Vorträge

Koller H. Ideas and concepts for improving quality, efficiency and avoiding complication in spinal deformity surgery. Invited key note lecturer at Japanese Spine and Research Society Annual Meeting, April 2022, Yokohama / Japan.

Koller H. Translating experiences from the treatment of cervical

deformities to the degenerative cervical spine. Invited key note lecturer at annual meeting of Eurospine 2022, Octobre 2022, Milano / Italy.

Koller H. Podium discussion and lecture: In a straight degenerative C-spine with compression, reconstruction of lordosis & balance is part of the job. Presented at annual meeting of CSRS-Europe, May 2022, Barcelona / Spain.

Koller H, Krol O, Imbo B, Joujon-Roche R, Tretiakov P, Williamson T, McFarland K, Dave P, Mir J, Vira S, Diebo B, Passias P. The Additional Burden of the Existence of Baseline Cervical Deformity When Undergoing Thoracolumbar Adult Spinal Deformity Corrective Surgery. Presented at CSRS annual meeting 2022, Dez 2022, San Diego / USA.

Koller H. The Importance of Sagittal Alignment: A German Perspective. 50th Annual Meeting of Japanese Society for Spine Surgery and Related Research. April 2021, Kyoto.

Koller H. Cervical deformity surgery: Learning from the past –Creating solutions for the future. 50th Annual Meeting of Japanese Society for Spine Surgery and Related Research. April 2021, Kyoto.

Koller H. Global Sagittal and Coronal Malalignment in the Patient with Parkinson’s: Surgical Considerations. Presentation 22th of September at 56th annual meeting of Scoliosis Research Society, Louis / USA, September 2021

Koller H. Zukunft der Revisionschirurgie bei Implantatlockerung. Pro: Die meisten Implantatlockerungen sind biomechanisch bedingt / Ein Wandel des Managements ist (nicht) notwendig“ . DWG-Jahrestagung, München. Decembre 2020.

Koller H. Successful cervical spine deformity surgery – „It is all about complication avoidance!“ Presented at DSS lunch symposia. 50th Annual Meeting of Japanese Society for Spine Surgery and Related Research. 22nd of April 2021, Kyoto.

Koller H. Anterior surgery in CSM: Subtotal corpectomy, multilevel ACDF and hybrid procedures – When & How ? Presented at Curso AHED, national spain wide educational orthopedic project. Webinar, Madrid / Spain. 29th of April 2021.

Koller H. Case-specific decision making for challenging cervical deformities. Presented at Annual Meeting of Cervical Spine Research Society – Asian Pacific. 26th of March, Seoul / Korea 2021.

Koller H. Digital Transformation During the Pandemic: How Did COVID-19 Change the Practice of Cervical Spine Surgery ? Invited lecture at 49th annual meeting of CSRS , Atlanta / USA, November 2021

Koller H. Cervical spine kyphosis. Invited lecture at 14. Annual meeting of Czech Spine Society, Spindleruv / Czech Republic, September 2021

Koller H. Upper thoracic spine pathologies. Invited lecture at 14. Annual meeting of Czech Spine Society, Spindleruv / Czech Republic, September 2021

Koller H. Occipital and Cervical Fixation with Cervical Pedicle Screws and Lateral Mass Screws. Presented at Scoliosis Research Society Cadaver Lab Course at University of Neijmegen / The Netherlands, Octobre 2021

Koller H. Hostettler I, Koller J, Stengel F, Mayer M, Hitzl W, Ferraris L, Meier O, Hempfing A. Cervical Alignment can Predict BEST- and WORST-Outcomes in Patients with Anterior Multilevel Cervical Decompression. A Study on 244 Patients with Degenerative Cervical Disease. Presentation #282. Presented at 36th annual meeting of CSRS-Europe, Paris / France, September 2021

Koller H. Correction strategy of cervicothoracic kyphotic deformity of the stiff spine. Invited Guest speaker at annual French spine society congress 2019. Strassbourg / France, June 2019.

Koller H. Tips and Tricks in subaxial cervical pedicle screw fixation. Invited guest speaker at Brazilian Spine Congress 2019. Sao Paulo / Brazil, April 2019.

Koller H. Importance of clinical and radiological ceervical alignment. Invited guest speaker at Brazilian Spine Congress 2019. Sao Paulo / Brazil, April 2019.

Koller H. Surgical Options in Cervical Deformity – European Perspective. Invited guest speaker at Brazilian Spine Congress 2019. Sao Paulo / Brazil, April 2019.

Koller H. The Cervical Spine & distal junctional kyphosis. Invited guest speaker at Brazilian Spine Congress 2019. Sao Paulo / Brazil, April 2019.

Koller H. Concepts of cervical spine deformity surgery. Invited guest speaker at Brazilian Spine Congress 2019. Sao Paulo / Brazil, April 2019.

Koller H. Sagittal Imbalance and Implications for Cervical Neck Pain. Invited Guest Speaker at the South African Spinal Society Congress 2016, Pretoria, South Africa, May 2016.

Koller H. Approach related complications. Invited Guest Speaker at the South African Spinal Society Congress 2016, Pretoria, South Africa, May 2016.

Koller H. Concepts and reconstructive strategies in biomechanically challenging, failed and osteoporotic revision cases. Presented at Lunch-Symposium of DepuySynthes at annual meeting of CSRS-E 2018, Lissabon / Portugal 2018.

Koller H. 10 key-points for cervical deformity treatment. Presented at Lunch-Symposium of DepuySynthes at annual meeting of CSRS-E 2018, Lissabon / Portugal 2018.

Koller H. Proximal and distal junctional kyphosis in the cervical spine. Presented at Lunch-Symposium of DepuySynthes at annual meeting of EUROSPINE, 2018. Barcelona / Spain.

Koller H. Cervical osteotomies and cervical deformity in 2018. Invited guest speaker at Nanjing Drum Tower Hospital and Peking 3rd Medical University Hospital, 2018.

Koller H. Cervical spine sagittal alignment: Importance. Invited guest speaker at Schulthess Clinic Academy Meeting June 2018.

Koller H. Osteotomies in Ankylosing Spondylitis. Invited guest speaker at Eurospine Meet the Experts Meeting March 2018, Madrid / Spain.

Koller H. Kyphotic deformity in the cervical spine – instructional course lecture. Presented at EMEA Spine Symposium April 2018. Hamburg / Germany.

Koller H. Causes & strategies for failed surgery in idiopathic scoliosis. Invited guest speaker at SILONY-Lunchsymposium, IMAST 2018, July 2018, Los Angeles.

Koller H. Treatment of adolescent double major & large curves >80°. Invited guest speaker at SILONY-Lunchsymposium, IMAST 2018, July 2018, Los Angeles.

Koller H. Cervical osteotomies: High-grade techniques & indications. Presented as invited Speaker at AO-Spine meeting at annual meeting of Frenche spine society. Nantes. April 2019.

Koller H. Zervikale Osteotomien – Status quo. DKOU Annual Meeting – Session “High-End zervikale Chirurgie”, Berlin 2018.

Koller H. Restotation of thoracic kyphosis in AIS. Techniques and implication of TK. Advanced techniques in AIS – Invited guest lecture at DSS – Lunch Session at IMAST 2017, Capetown, South Africa.

Koller H. Invited Guest Lecture: Treatments Concepts in spinal deformity surgery 2016. Presented at International Medical Congress. Orthopedics and its capabilities. Ljubjana / Slowenia 2016.

Koller H. CSRS-ES Lunch-Symposium at Global spine: Dysphagia / Dysphonia complicating cervical spine surgery. Global Spine Meeting, 4th of May, Mailand / Italy 2017.

Koller H. Invited Guest Speaker. Deformity session. Complications and Management in Cervical Deformity Surgery. Global Spine Meeting. 4th of May, Mailand / Italy 2017.

Koller H. Treatment of elderly patients with upper cervical spine injury.
Invited guest Lecture. AO-Spine Symposium on spinal trauma & spinal cord injury at Nijmegen University, 7./8. October 2010.

Koller H. Zenner J. The development of ATPS.
Invited guest Lecture. Meeting with Nagoya Spine Study Group, Nagoya / Japan 21.9.2010.

Koller H. Zenner J, Anterior and poster cervical spine revision surgery.
Invited guest Lecture. Meeting with Nagoya Spine Study Group, Nagoya / Japan 21.9.2010.

Koller H. Challenges and complications in scoliosis surgery.
AO Spine Expert Meeting 2012. Innsbruck 2012.

Koller H. Debate Session: Neuromuscular Scoliosis. Fix the pelvis or not ?. AO Spine Expert Meeting 2012. Innsbruck 2012.

Koller H. Posterior subaxial cervical fusion: Lateral mass and pedicle screws: CSRS-E autumn instructional courses 2012, Barcelona / Spain.

Koller H. Anterior cervical fusion options: CSRS-E spring instructional course 2012, Barcelona/Spain.

Koller H. Lateral mass screws and fusion: CSRS-E spring instructional course 2012, Barcelona/Spain.

Koller H. Cervical kyphosis in Neurofibromatosis. Invited lecture at CSRS-E lunch symposium. at Spineweek, Amsterdam/Netherlands 2012.

Koller H. Os odontoideum. Invited lecture at CSRS-E lunch symposium at Spineweek, Amsterdam/Netherlands 2012.

Koller H. Basilar Invagination & Platybasia. Presented at Depuy-Synthes CSRS-ES Lunch Symposium, 29th annual meeting 2013 of CSRS-ES, Bordeaux/France.

Koller H. Anterior Cervical Fusion & Pseudoarthrosis: „The goal is solid fusion !. Invited lecture at 29th annual meeting 2013 of CSRS-ES, Bordeaux/France.

Koller H. Challenges in the Treatment of Spinal Deformities in the Aging Population: Review of Potential Complications. Medtronic Fundamental Deformity Course London 2015.

Koller H. Challenges with Pedicle Screw Fixation of Cervical Spine & Solutions using a Dynamic Surgical Guidance (DSG) device. Invited Guest Speaker Lecture at Annual Meeting of Japanese Spine Society 2015, Fukuoka, Japan, April 2015.

Koller H. Guest of Honor Lecture: Rationals for Fusion Level Selection in AIS Lenke 3 to 6 curves. Presented at Journees Euros, Marseille, 14-16.5.2015.

Koller H. Guest of Honor Lecture: Lumbosacral & Lumbopelvic Reconstruction: Current Concepts, Techniques & Pitfalls. Presented at Journees Euros, Marseille, 14-16.5.2015.

Koller H. Challenges & Strategies in Cervical Spine Revision Surgery – With a special focus on cervical kyphosis. Invited Lecture at Dutch Spine Society Annual Meeting, Leuven, November 2015.

Koller H. Cervical Spine Sagittal Balance – From Theory To Clinical Impact. Invited Lecture at Dutch Spine Society Annual Meeting, Leuven, November 2015.

Koller H. How I do it: Cervicothoracic Osteotomy in AS. European Association of Neurological Surgeons Advanced Course in Spinal Surgery. Innsbruck, AUT, 6.9.-8.9.2015.

Koller H. How I do it: AIS correction. European Association of Neurological Surgeons Advanced Course in Spinal Surgery. Innsbruck, AUT, 6.9.-8.9.2015.

Koller H. Different Sacral Pelvic Fixation Options. Role of S1 Ala Fixation. Depuy Synthes Spine – Lunchsymposium. Eurospine Kopenhagen 2015. 2.9.2015.

Koller H. Implant failures in the cervical spine and it’s reasons. Invited Speaker at 24th Ulm Spine week, Ulm Germany 2015.

Koller H. Principles of cervical spine deformity correction. Invited Speaker at 24th Ulm Spine week, ulm Germany 2015, 2016, 2017, 2018 and 2019.

Koller H. Osteotomien bei posttraumatische Kyphose. AO-Spine Symposum – Komplikationen in der Wirbelsäulenchirurgie. 18.Juni 2016, Frankfurt/Germany.

Koller H. Annual invitations as guest and speaker at CSRS-ES Instructional Course March and Octobre: Cervical Kyphosis Issues, Barcelona Spain 2011-2019.

Koller H. Invited Guest Speaker. AIS – How I do it. 13th Advanced Deformity Symposium: What’s new in Adolescent Idiopathic Scoliosis 11-12 May, 2017 Lisbon, Portugal.

Koller H. Invited Guest Speaker. AIS and sagittal plane problems: Restoration and preservation. 13th Advanced Deformity Symposium: What’s new in Adolescent Idiopathic Scoliosis 11-12 May, 2017 Lisbon, Portugal.

Koller H. Invited Guest Speaker. AIS & pulmonary compromise. 13th Advanced Deformity Symposium: What’s new in Adolescent Idiopathic Scoliosis 11-12 May, 2017 Lisbon, Portugal.

Koller H. Complex Cervical Surgery: Correction of cervical deformity. J&J EMEA Spine Symposium. Hamburg / Germany, March 2019.

Koller H. Selective thoracic fusions in Lenke 1 C curves. Eurospine annual meetign. Scoliosis pre-day course. Helsinki / Finnland, Octobre 2019.

Koller H. Sagittal plane considerations in the choice of fusion levels and surgical maneuvers in thoracic curves. Helsinki / Finnland, Octobre 2019.

Koller H. Posttraumatic Deformity of the Cervical Soine. J&J Lunch symposium at annual meeting of CSRS-E. Roma / Italy, May 2019.

Koller J and Koller H. Growing rods / Growing Spine. How to avoid complications. : Tips and tricks. Eurospine Spring Meeting Frankfurt. Frankfurt / Germany. April 2019.

Koller H. Cervical Spine Deformity – Current concept. Ulm Spine Week 2019. Ulm / Germany. March 2019.

Koller H. Cervical Deformity Surgery: The 10 main pitfalls to avoid ! J&J Breakfast symposium at annual IMAST 2019. Amsterdam / Netherlands . July 2019.

Koller H. instrumentation & Reconstructive techniques in the pediatric cervical spine: Challenge and solutions. Helsinki / Finnland, Octobre 2019. Invited Speaker at annual IMAST 2019. Amsterdam / Netherlands . July 2019.

Koller H. Challenges with posterior reduction techniques in deformity, trauma surgery and in osteoporotic spines. DepuySynthes Spine – Posterior cervical cadaver event. Soluthurn / Switzerland. June 2019.

Koller H. Pearls for Instrumentation and Reconstructive Techniques in the Pediatric Cervical Spine. Symposiun II, CSRS-NA annual meeting – New York / USA, Dez.2020.

Koller H. Symposium IV: Cervical Deformity and Complex Cervical. Management of Cervical Deformity. Resulting from Trauma. CSRS-NA annual meeting – New York / USA, Dez.2020.

Koller H. Zenner J, Resch H, Schwaiger R, Resch H: Die Bedeutung der sagittalen Balance in der Beurteilung thorakolumbaler und lumbaler Berstungsbrüche.
Jahrestreffen der AG Wirbelsäule der ÖGU, November 2007, Innsbruck/Österreich.

Koller H. Sagittales Profil. Korrektur ist die oberste Maxima: Pro. Invited guest speaker at German Spine Society annual meeting 2018. Wiesbaden / Germany.

Koller H. The big 5 – Die wesentlichen Herausforderungen in der Wirbelsäulenchirurgie 2018 – Deformitäten – Invited guest speaker at DSS Lunch-Symposium at German Spine Society annual meeting 2018. Wiesbaden / Germany.

Koller H. Drüber – Caudale Verankerungsmöglichkeiten bei langstreckigen Spondylodesen – Was sind die Optionen? Invited lecture AO-Spine Session Deutschland. 12.Jahrestagung der DWG, Stuttgart, Dezember 2017.

Koller H. Korrektur kyphotischer Deformitäten der HWS. DSS-Lunch Workshop. 12. Jahrestagung der DWG, Stuttgart 2017.

Koller H. Multiple failed back surgery ? Pro Revision. Forum Wirbelsäulenchirurgie, DWG-Verantstaltung. St.Anton Januar 2017.

Koller H. Osteotomietechniken an der Halswirbelsäule und oberen Brustwirbelsäule – DWG Master-Kurs. Leipzig, September 2017.

Koller H. Osteotomietechniken an der Halswirbelsäule und oberen Brustwirbelsäule – Stellenwert der Korporektomie DWG Master-Kurs. Leipzig, September 2017

M.Mayer, Koller H. Invited Lecture. Status quo Skoliosetherapie 2017. Interdisziplinäre Fortbildung des Klinikum Bogenhausen. München,9.5.2017.

Koller H. Invited Guest Speaker: Cervicale Revisionschirurgie: Von der Prävention zur Problemlösung. Jahrestagung der ÖGU Salzburg 6.10.2016.

Koller H. Invited Guest Speaker. Eurospine 2016. Spineguard Lunch-time session: Improvement of Surgical Efficacy in Cervical Reconstructive Surgery using the Pediguard. Eurospine, Berlin 5.10.2016.

Koller H. Zenner J, Hempfing A. Auswirkungen von posttraumatischen Fehlstellungen auf die globale Balance der Wirbelsäule.
44.Jahrestagung der ÖGU, October 2008, Salzburg/Österreich.

Koller H. Pedikulierungstechniken thorakal, lumbal und lumbosacral. Free-hand und röntgengestützt.
Operative Techniken an der degenerativen LWS, Hands-On Kurs 2010 München-Bogenhausen, Neurochirurgie, 09.-10.01.2010.

Koller H. Rekonstruktionstechniken thorakolumbal und lumbosakral. Operative Techniken an der degenerativen LWS, Hands-On Kurs 2010 München Bogenhausen, Neurochirurgie, 09./10.01.2010.

Koller H. HWS-Revisionschirurgie: Diagnostik und Behandlungskonzepte.
Passionate about Spine Seminar 2010, Hotel Kempinski Neu-Isenburg Frankfurt, Mai 2010.

Koller H. Die dorsale Stabilisierung C1-2.
Invited guest lecture. AIOD Meeting 2010. Ellington Hotel, Berlin.

Koller H. Sagittale Balance & Stabilität der Wirbelsäule. Modul I der DWG, Mainz , April 2015

Koller H. Cervical Sagittale Balance. Wirbelsäulensymposium am Diakonie-Klinikum Stuttgart: „Wie viel Balance braucht die Wirbelsäule?“, 15.03.2014

Koller H. Diagnostik und Therapie der Spondylitis Ankylosans (AS). 26.11.2015, Leipzig
Modul 5 der DWG.

Koller H. Wenn er der Frau nicht mehr in die Augen schauen kann – Osteotomien der HWS. Eingeladener Render beim 1. Lorsches Wirbelsäulensymposium

Koller H. Jährliche Vorlesungen im Rahmen der „CSRS-ES Instruction Courses – Hands on“, Barcelona/Spain, seit 2012-14. Themenbeispiel: Occipito-cervical Junction & Upper Cervical Spine. Posterior Approach – Technical Details & Important Remarks related to apply different devices & possibilities of treatment. XVIIth CSRS-ES Instructional Course, Barcelona/Spain, Oktober 2015.

Koller H. Concept of Cervical sagittal balance – Measurements Cervical balance effects clinical outcome: YES. Zimmer Biomet Symposium, 21.-22.April 2016, Winterthur, Switzerland.

Koller H. How to produce cervical sagittal balance: Diagnosis + Planning. Zimmer Biomet Symposium, 21.-22.April 2016, Winterthur, Switzerland.

Koller H. Degenerative Cervical Kyphosis. Aesculap Spine Days, Tuttlingen, Germany 25.4.2016.

Koller H. Invited Guest Speaker: Kindliche Skoliose – Typische Behandlungsfehler. Forum Wirbelsäulenchirurgie, St.Anton am Arlberg, Januar 2017.

Koller H.Die Posttraumatische Deformität der Halswirbelsäule. AO-Spine Basis Seminar-Frakturen. Modul 4 der DWG-Kurse. Ingoldstadt / Dtld. September 2019.

Theurer D, Kammermeier V, Stecher J, Koller H., Holz U. Die operative Versorgung der Densfraktur im fortgeschrittenen Lebensalter.
67.Jahrestagung der DGU. Oktober 2003/Berlin.

Koller H., Kathrein A.: Long-Term Results and Recommendations for the Treatment of unstable Traumatic Spondylolisthesis C2-3.
Spineweek 2004, CSRS-E annual meeting. July 2004/Porto, Portugal.

Koller H., Kathrein A. Langzeitergebnisse und Empfehlungen zur Behandlung der instabilen Traumatischen Spondylolisthese C2-3.
40.Jahrestagung der ÖGU, Oktober 2004/Treffen AG-Wirbelsäule, Salzburg/Österreich.

Koller H., Daniaux H, Blauth M, Kathrein A. Die Traumatische Spondylolisthese C2-3: Überlegungen zur Behandlungsstrategie und Langzeitergebnisse nach operativer Versorgung.
68.Jahrestagung der DGU. Oktober 2004/Berlin.

Kammermeier V, Koller H., Stecher J, Oberst M., Holz U. Die CT-basierte, navigierte C1-C2 Fusion nach Magerl mit dem Brain Lab System.
68.Jahrestagung der DGU. Oktober 2004/Berlin.

Kammermeier V, Koller H.. Computernavigation in der Wirbelsäulenchirurgie.
Highlights, Juni 2005/Stuttgart.

Koller H.., Oberst M., Ulbrecht D., Holz U.: Clinical Outcome and sporting capacity after atlantooccipital dislocation.
EFORT-Congress. Juni 2005, Lissabon/Portugal.

Kammermeier V, Koller H., Ulbricht D, Holz U. Evaluierung anatomischer Landmarken zur Standardisierung der ventralen atlantoaxialen Verschraubung.
69.Jahrestagung der DGU. Oktober 2005/Berlin.

Kammermeier V, Koller H., Ulbricht D, Holz U. Anterior retropharyngeal fusion C1-2 for stabilisation of atlantoaxial instabilities.
22nd annual meeting of the CSRS-E, May 2005, Berlin.

Tauber M, Moursy M, Koller H., Resch H. Operative Versorgung der distalen Humerusfraktur des alten Menschen – Ergebnisse und Komplikationen.
43.Jahrestagung ÖGU, October 2007, Salzburg/Österreich.

Koller H., Kolb K, Holz U. Die Ellenbogenarthrodese: Indikationen, Operationstechniken und Langzeitergebnisse bei 14 Patienten. 43.Jahrestagung ÖGU, Oktober 2007, Salzburg 10/Österreich.

Koller H., Kolb K, Holz U. Die Ellenbogenarthrodese: Indikationen, Operationstechniken und Langzeitergebnisse bei 14 Patienten.
50.Jahrestagung DGU 2007, Berlin 11/2007.

Tauber M, Moursy M., Koller H., Resch H. Die operative Versorgung der distalen Humerusfraktur des alten Menschen. Ergebnisse und Komplikationen. 43.Jahrestagung ÖGU, Salzburg 10/2007.

Kolb K, Koller H., Holz U, Grützner PA. Die Ellenbogenarthrodese – Indikation, Operationstechnik und Ergebnis bei 14 Patienten.
15. Jahreskongress der Deutschen Vereinigung für Schulter- und Ellenbogenchirurgie, Hannover 2008.

Hempfing A, Koller H., Ferraris L, Meier O. Grenz und Fehlindikationen interspinöser Implantate. Eine kritische Bewertung anhand von Fallbeispielen.
57. Jahrestagung der Norddeutschen Orthopädenvereinigung 2008.

Koller H.. Meier O. Die dorsale Instrumentierung an der Halswirbelsäule.
Depuy-Seminar, Erlangen 2008

Meier O, Koller H.. Korrekturmöglichkeiten der posttraumatischen Kyphose.
44.Jahrestagung der ÖGU Salzburg 2008.

Meier O, Koller H.. Fortgeschrittene HWS-Chirurgie: Ventrale multi-level und Revisionschirurgie.
Bad Wildungen Depuy-HWS-Seminar 2009

Koller H.. Fortgeschrittene HWS-Chirurgie: dorsale Instrumentation der HWS.
Vortrag Bad Wildungen HWS-Seminar 2009

Hempfing A, Koller H.. Bandscheibenendoprothetik.
Vortrag Bad Wildungen HWS-Seminar 2008

Mayer M, Zenner J, Auffarth A,Koller H.. Hazards of anterior odontoid screw fixation in the elderly patient – A CT-based analysis of risk factor for non-union.
Global Spine Congress 2009, San Francisco/USA.

Koller H., J Zenner, A Hempfing, S Ondra MD, T Koski MD, F Acosta MD, L Ferraris, O Meier, Failure and Success of Spinal Surgery in Patients with Parkinson’s Disease – A Critical Case Series Review in Light of Sagittal Balance.
Paper #60: 16th IMAST Vienna 2009.

Hart R, Tomasino A, Parikh K, Koller H., Zink W, et al. The vertebral artery and the cervical pedicle: Morphometrical analysis of a critical neighborhood.
Global Spine Congress 2009, San Francisco/USA.

Koller H., Zenner J, Mayer M. A comparative study of in-vivo sagittal plane rotation C1-2 in volunteers immobilized in the halo thoracic vest or Philadelphia collar.
Paper #125, Global Spine Congress 2009, San Francisco/USA.

Zenner J, Koller H. et al. Does clinical assessment of neck rotation resemble the atlantoaxial rotatio preserved after notion sparing treatment of C1 and C2 injuries ? Morphometric analysis using dynamic CT-scans.
Global Spine Congress 2009, San Francisco/USA

Koller H., Mayer M, Zenner J et al. The impact of posttreatment alignment on atlantoaxial rotation and clinical outcome in C2 fractures.
Annual meeting of the CSRS-E, Uppsala/Sweden 2009.

Zenner J, Koller H., Mayer M, Resch. Plain radiographs versus CT scans in the assessment of odontoid fracture union. Do we have to revisit our published union rates.
Annual meeting of the CSRS-E, Uppsala/Sweden 2009.

Koller H., Zenner J, Mayer M, Acosta F et al. Development of the AnteriorTranspedicularScrew (ATPS) fixation technique: A three-part study project on clinical preparation for ATPS.
Annual meeting of the CSRS-E, Uppsala/Sweden 2009.

Ferraris L, Koller H. Staged surgery for rigid scoliosis correction.
Depuy-Expert-Meeting Buenos Aires 2009.

Ferraris L, Koller H. Revision surgery for failed total cervical disc replacement.
Depuy-Expert-Meeting Buenos Aires 2009.

J Zenner, K Kolb, A Auffarth, J Reynolds, H Resch, S Lederer, F Acosta, M Mayer, Koller H. Plain radiographs vs CT scanning in the assessment of odontoid fracture union – pseudoarthrosis rate have to be revisited! Paper #9, Eurospine 2009, Warsaw/Polen.

Koller H., J Zenner, L Ferraris, A Hempfing, F Acosta, O Meier. Report on failure and success of multilevel spinal surgery in patients with Parkinson’s disease and the importance of sagittal and spino-pelvic balance.
Special Poster Session #9, Eurospine 2009, Warsaw/Polen.

Koller H., J Zenner, T Kathrein, R Penzkofer, M Tauber, L Ferraris, M Mayer. A biomechanical rationale for C1-Eing osteosynthesis as treatment alternative for unstable Jefferson Burst Fractures (JBF) with incompetency oft he transverse atlantal ligament (TAL).
Special Poster Session #31, Eurospine 2009,Warsaw/Polen.

Koller H., J Zenner, M Mayer, S Lederer, A Auffarth, H Resch, W Hitzl, A Hempfing, M, Tauber. Clinical assessment of axial neck rotation is not a reliable measure for C1-2 rotation range of motion. Results of a morphometrical analysis using dynamic CT-scans.
Special Poster Session #32, Eurospine 2009,Warsaw/Poster.

Meier O, Koller H., A.Hempfing. Behandlung von Frakturen bei M. Bechterew.
Basiskurs DWG September 2009 Frankfurt

L.Ferraris, Koller H.. Biomechanics of lumbosacral fixation.
EFFORT-ExMEx Forum, November 2009, Barcelona/Spain.

Koller H., J. Zenner, Penzkofer, M.Tauber, M.Mayer, H.Resch. C1-ring osteosynthesis is a biomechanically sound alternative for the treatment of displaced Jefferson Burst Fractures with incompetency of the transverse atlantal ligament.
4.Jahrestreffen Deutsches Gesellschaft für Wirbelsäulenchirurgie. München. Vortrag 6 (Abstract: Eur Spine J (2009) 18:1715).

Koller H., R.Schmidt, J.Zenner, H-J.Wilke, L.Ferraris, M.Mayer. The impact of cervical pedicle screw anchors in 2-level corpectomy reconstructions – A biomechanical study and first test bed results of ATPS-prototyping.
1st inaugurial meeting of CSRS-Asian Pacific 2010, 25.4.2010, Lecture: F4-2, Kobe/Japan.

Koller H.., Zenner, J., Schmidt, R., Meier, O., Ferraris, L., Mayer, M. Impact of cervical pedicle screws on primary stability of instrumented 2-level corpectomy reconstructions: biomechanical investigation and first test bed results of ATPS-prototyping.
Annual Meeting CSRS-E Corfu/Greece, May 2010. Lecture 24.

Koller H., Bransford, R., Caron, T., Zenner, J., Tomasino, A.,Hartl, R., Fratezi, J.P., Mayer, M. DISH-related cervical spine trauma: injury characteristics and early outcome with surgical treatment. Annual Meeting CSRS-E Corfu/Greece, May 2010. Lecture 36.

Mayer M, Zenner J, Resch H, Hitzl W, Koller H. Biomechanische Analyse eines 1-Level-Korpektomie-Modells von 5 anterior-only Techniken zur Rekonstruktion des Wirbelsäulenalignmentss und ihres Potentials, axial Vorlast auf einen Wirbelkörperersatz auszuüben. 46.Jahrestagung der ÖGU, 7.10.2010: Session E7.

Koller H., Meier O, Ferraris L, Hempfing A, Umstätter M, Schmidt R, Zenner J. Results of surgical treatment for Scheuermann’s kyphosis using combined front-back approach & pedicle screw constructs: A base for benchmark comparisons through analysis of 111 cases.
Paper #43. 17th IMAST 2010, Toronto/Canada.

Koller H., Gajic V, Meier O, Ferraris L, Hempfing A, Schmit P, Zenner J. Impact of Halo-Gravity-Traction (HGT) on curve rigidity and pulmonary function: Refining indications for HGT in the treatment of rigid scoliosis & kyphoscoliosis.
Paper #73 45th annual meeting of SRS, Kyoto/Japan.

Zenner J, Umstätter M, Schmidt R, Ferraris L, Meier O, Koller H. Die Therapie der Scheuermann-Kyphose mit ventralem Release und dorsaler Kompressionsspondylodese: Radiologische und klinische Ergebnisse in 111 Fällen. Paper #75, 5.Jahrestagung der DWG 2010, Dezember 2010, Bremen.

M. Mayer, J. Zenner, A. Auffarth, H. Resch, Koller H. Ventrale Schraubenosteosynthese der Densfraktur des älteren Patienten: Eine CT-basierte Analyse zur Identifizierung von Risikofaktoren zur Ausbildung einer Pseudarthrose. ÖGU Jahrestreffen Oktober 2011: V11

M. Mayer, J. Zenner, G. Korn, H. Resch, Koller H. Titel: Revisions-Strategien für fehlgeschlagene posteriore C2-Pedikelschrauben – Eine biomechanische Analyse. ÖGU Jahrestreffen Oktober 2011: V10

Koller H., O. Meier, J. Zenner, H. Albrecht, W. Hitzl. Single Center Analysis of Anterior Correction and Fusion (ASF) for Selective Thoracic Fusion in AIS. Analysis of Efficacy, Restoration of Thoracic Kyphosis and Prediction of Spontaneous Lumbar Curve Correction in >300 patients. V3 at annual congrerss of German Spine Congress.

Koller H., O.Meier, J.Zenner, L.Ferraris. The efficacy of cervical pedicle screw fixation using an electrical conductivity device: First report of a consecutive case series of 50 patients with analysis of accuracy and technical details. V7 at annual congress of German Spine Congress.

S. Núñez-Pereira, W. Hitzl, J. Zenner, L.Ferraris, O. Meier. M. Mayer, Koller H.. Cervical Alignment and Sagittal Balance. Definition of Clinical Relevant Interdependencies C0-C7 under the Influence of Spinopelvic Balance. V14 at annual congrerss of German Spine Congress.

Koller H., M.Mayer, J. Zenner, A. Auffarth. The impact of a constrained double-screw anchor on resistance to cyclic loading and holding strength in anterior scoliosis and deformity surgery. V25 at annual congrerss of German Spine Congress.

Koller H., O. Meier, J. Zenner, W. Hitzl. Spontaneous lumbar curve correction after selective thoracic fusion of 273 AIS. Clear thresholds improve prediction accuracy of lumbar curve resolution. V60 V25 at annual congrerss of German Spine Congress.

Núñez-Pereira S., Hitzl W.,Koller H..; Sagittal balance of the cervical spine: Analysis of
occipitocervical interdependence. #60, Spineweek 2012, Amsterdam/Netherlands.

Koller H., Mayer M, Resch H, Korn G, meier O, Hitzl W, Zenner J. Coparison of revision strategies for failed C2-pedicle screws – A biomechanical study. P#10-03 Annual meeting of the CSRS-AP, Busan/South Korea 2011.

Koller H., Ferraris L, Meier O, Schmack P, Zenner J. C1-lateral mass screw fixation: Usage of a C1-trocar facilitates screw placement in atlantoaxial instabilities. P#09 at annual meeting of the CSRS-E, Istanbul/Turkey

Zenner J, Korn G, Mayer M, Resch H, Hitzl W, Keudel A, Koller H. The impact of working length of occipital screws on the pullout resistance of the screw-plate construct. A biomechanical cadaver study. P#25 at annual meeting of the CSRS-E, Istanbul/Turkey

Sitte I, Meier O, Koller H. Ultrastructural Differences in Intervertebral Disc Cell Morphology in idiopathic scoliosis. P#553 at 18th annual meeting of IMAST, Copenhage/Denmark 2011.

Mayer M, Korn G, Resch H, Keudell A, Hitzl W, Zenner J, Koller H. comparison of revision strategies for failed C2-pedicle screws – A biomechanical study. P#38 at annual meeting of the CSRS-E, Istanbul/Turkey

Koller H., Zenner J, Ferraris L, Hitzl W, Meier O. Historical foundation for use and justification of instrumented cervicothoracic osteotomy correction in ankylosing spondylitis – clinical rationales based on results with Mason-Urist Osteotomies C7-T1 and gradual Halo-Thoracic-Cast correction. P#40 at annual IMAST 2011, Kopenhagen/Denmark

Koller H., Lenke L, Nakamura Y, Bridwell KH, Koester L, Hempfing A, Ferraris L, Meier O, Zenner J, Hitzl W. Comparison of anteiror/posterior to posterior-only correction of Scheuermann’s kyphosis. A matched pair analysis of 166 patients. P#80 at annual IMAST 2011, Kopenhagen/Denmark.

Koller H., Mayer M, Zenner J, Hitzl W, meier O, Resch H. The impact of a distal expansion mechanism added to a standard pedicle screw on pullout resistance: A biomechanical study. P#79 at annual IMAST 2011, Kopenhagen/Denmark.

Koller H. L. Lenke, J. Zenner, L.Ferraris, A. Hempfing,W. Hitzl, K. Bridwell, M. Umstätter, O. Meier. Comparison of Anterior/Posterior to Posterior-Only Correction of Scheuermann’s Kyphosis: A matched pair analysis of 166 patients. V60 at annual meeting of the German Spine Society 2011, Hamburg/Germany.

Koller H., McClung A, Sucato DJ. Parameters Leading to a Successful Outcome Following Surgical Treatment for Lenke 2 Curves. Paper #35, presented at annual IMAST 2013, Vancouver/Canada.

Zenner J, Bismarck C, Hitzl W, Koller H.. Awareness of coexistence of neck and shoulder disability: results of a population-based study on normative scores and multifactorial risks of neck and shoulder problems. Papaer 22, presented at annual CSRS-ES, Bordeaux/France.

Zenner J, Mayer M, Bismarck C, Koller H.. Eine Studie über die Koinzidenz von HWS- und Schulterbeschwerden – Ergebnisse einer populationsbasierten Studie über Normalverteilung, Risikofaktoren und das Ausmaß gegenseitiger Interaktion – Wirbelsäulenchirurgen seid wachsam! Jahrestreffen der Deutschen Wirbelsäulengesellschaft, Frankfurt 12/2013: Vortrag 2.

Koller H.. Risikofaktoren, Komplikationen und Ergebnisse – eine Studie über 448 adulte Skoliosen zur Bestimmung von Prädiktoren für erfolgreiche Behandlung. Jahrestreffen der Deutschen Wirbelsäulengesellschaft, Frankfurt 12/2013: Vortrag V26

Koller H.. Beurteilung der Lungenfunktion von Skoliosekindern auf Basis der radiologischen Deformität – ein Beitrag zur frühhzeitigeren Identifi kation von Risikopatienten für pulmonale Funktionsstörungen. Jahrestreffen der Deutschen Wirbelsäulengesellschaft, Frankfurt 12/2013: Vortrag V41

Mayer M, Hitzl W,, Meier O. Koller H.. Optimierung sakraler Instrumentierung durch Verwendung eines winkelstabilen S1-Doppel-Schrauben Ankers im S1-Pedikel und -Ala im Vergleich zur S1-Pedikelschraube – eine biomechanische Untersuchung mit zyklischen und coaxialen Belastungen. Jahrestreffen der Deutschen Wirbelsäulengesellschaft, Frankfurt 12/2013: Vortrag V42.

Koller H.. Identifikation relevanter Parameter für eine erfolgreiche Skoliosekorrektur und Schulterbalance bei Patienten mit Lenke 2 Krümmung – eine Studie über 158 Patienten mit adoleszenter idiopathischer Skoliose (AIS). Jahrestreffen der Deutschen Wirbelsäulengesellschaft, Frankfurt 12/2013: Vortrag V43.

Koller H.. Kriterien für eine erfolgreiche Korrektur thorakolumbaler und lumbaler Skoliosen – eine Studie über die Ergebnisse von Prädiktionsanalysen bei 245 Patienten mit Adoleszentenskoliose. Jahrestreffen der Deutschen Wirbelsäulengesellschaft, Frankfurt 12/2013. Vortrag V45.

Mayer M, Zenner J, Hitzl W, Meier O, Koller H. Eine Studie zur Beurteilung der atlantoaxialen Rotation – Können wir der klinischen Untersuchung vertrauen? Jahrestreffen der Deutschen Wirbelsäulengesellschaft, Frankfurt 12/2013. Vortrag V56.

Koller H., Mayer M, Zenner J. Pedicle Screw Fixation in Cervical Deformity Surgeries using an Electrical Conductivity Device (ECD). Report of a German Experience and Results of Accuracy in a Consecutive Case series of 137 patients.

Koller H., Zenner J, Koeszegary M, Mayer M. Construct stability of an instrumented 2-level cervical corpectomy model following fatigue testing:biomechanical comparison of antero-posterior instrumentation (360°) versus a novel anterior-only transpedicular screw-plate fi xation technique. CSRS-ES annual meeting: #OP8

Koller H., Mayer M, Hempfing A, Ferraris L, Meier O. Posterior Release, Temporary Internal Distraction Using the Magnetic Rod and Definitive Posterior Fusion for Severe Idiopatic Kyphoscoliosis in a 13-Year-Old AIS Patient. 49th Annual Meeting of the SRS, Anchorage, Alaska. Presentation 1A.

Koller H., Schulte TL, Zenenr J, Schmücker JA, Ferraris L, Hempfing A, Dreimann M, Meier O, Mayer M. The Effect of Late Isolated Rib Humb Resection on the evolution of pulmonary function. 49th Annual Meeting of the SRS, Anchorage, Alaska 2014. Presentation #98.

Koller H., Ito M, Pilkahn C, Meier O, Nunez-Pereira S, Sudo H. Long-term maintenance of spontaneous lumbar curve correction following selective thoracic fusion of Lenke 1 curves in AIS: Radiographis and clinical results 13 years after ASF. 49th Annual Meeting of the SRS, Anchorage, Alaska 2014. Presentation 123.

Koller H., Meier O, Zenner J, Dreimann M. Correlation of pre-operative deformity magnitude and pulmonary function tests (PFT) revisited: A study of 492 socliosis patients to improve the prediction of PFT using radiographs. 49th Annual Meeting of the SRS, Anchorage, Alaska 2014. Presentation 125.

Koller H., Meier O. Improving the Prediction of Spontaneous Lumbar Curve Correction (SLCC) with Selective Thoracic Fusions: A Study on 306 AIS Patients. IMAST 21st Valencia, Spain 3014. Paper #60.

Koller H., Zenner J, Meier O, Mayer M. Reliability of computer tomography scanning for the analyis of cervical fusion and pseudoarthrosis. A prospective study benchmarking CT-based decision making and surgical experience. Presentation at Annual meeting of the CSRS-ES, London May 2015.

Mayer M, Meier O., Koller H. Multilevel Anterior Cervical Decompression, Fusion, and Plate Fixation crossing the cervicothoracic Junction: Surgical Outcomes and Complications. Presentation at Annual Meeting of CSRS-ES London May 2015

Koller H. M. Mayer, A. Hempfing, O. Meier, H. Koller. Multisegmentale ventrale zervikale Dekompression, Spondylodese und Plattenosteosynthese über den cervikothorakalen Übergang – chirurgische Ergebnisse und Komplikationen. Jahrestreffen der Deutschen Wirbelsäulengesellschaft, Frankfurt 12/2015. Vortag 31.

Koller H., K. Mühlenkamp, M. Mayer, A. Tomasino, A. Hempfing, O. Meier. Chirurgische Ergebnisse und Komplikationen in der anatomischen Reposition hochgradiger Spondylolisthesen L5-S1 – Bedeutung der lumbosakralen Kyphosekorrektur und Einfluss der segmentalen Distraktion. Jahrestreffen der Deutschen Wirbelsäulengesellschaft, Frankfurt 12/2015. Vortrag 40.

Koller H., R. Hart, O. Meier, M. Mayer. Hat es wirklich funktionelle Konsequenzen bei L5 zu stoppen? Eine Studie über funktionelle Langzeitresultate und Differenzen nach multisegmentaler Fusion bis L5 versus S1 – eine Matched-Pairs Studie unter Berücksichtigung der sagittalen Balance. Jahrestreffen der Deutschen Wirbelsäulengesellschaft, Frankfurt 12/2015. Vortrag 43.

Koller H., A.-K. Gerding, A. Tomasino, S. Núñez Pereira, M. Mayer, A. Hempfing O. Meier. Der Einfluss von Implantatdichte und Ponte-Osteotomien auf das Korrekturergebnis von adoleszenten idiopathischen Skoliosen (AIS) mit thorakaler Krümmung >80°. Jahrestreffen der Deutschen Wirbelsäulengesellschaft, Frankfurt 12/2015. Vortrag 44.

Koller H., J. Seifert, M. Mayer, A. Hempfing, O. Meier. Die Vorhersage des Postoperativen C7-Lots nach Operativer Korrektur von Fixierter Sagittaler Imbalance bleibt eine Herausforderung – eine Studie zur Evaluierung existierender Planungsmodelle an Patienten mit M. Bechterew. Jahrestreffen der Deutschen Wirbelsäulengesellschaft, Frankfurt 12/2015. „Best of Session“.

Koller H. Rumpfdekompensation nach Osteoprotischer Fraktur. DWG Modul 3 – Münsteraner
Deformitäten Kurs. August 2015.

Koller H. Jährliche Vorlesungen im Rahmen der unfallchirurgischen studentischen Ausbildung an der Paracelsus Medical University Salzburg, Österreich; 2012-2015.

Koller H., Mayer M, Meier O, Contag AG, Daniels AH, Hamilton DK, Smith JS, Bess S, MD, Klineberg EO Ames CP, Schwab FJ, Robert AH; International Spine Study Group. Selecting Caudal Fusion Levels: Two Year Functional Outcomes with Matched. Pairs Analysis in Multilevel Fusion to L5 versus S1. IMAST 2015, Kuala Lumpur, Malaysia, July 2015; Paper # 105.

Koller H., Mayer M, Hempfing A, Meier O, Mühlenlamp K. Prediction of Surgical Outcomes and Complications with Reduction of High-Grade Spondylolisthesis. IMAST 2015, Kuala Lumpur, Malaysia, July 2015; Paper # 130.

Mayer M, Koller H. Adulte Skoliose, Herausforderungen und Komplikationen. Live-Surgery Wirbelsäulensymposium am Donauspital Wien: November 2015.

Koller H. Challenging Pedicle Screw for Deformity Surgeries: Techniques & Pitfalls. 1st Pediguard Workshop, April 2016, Bad Wildungen, Germany.

Koller H. Der krumme Rücken im Kinder- und Jugendalter (Skoliose , Kyphose). Tag der Rückengesundheit der Schön Klinik Nürnberg Fürth. April 2016.
Using Standardized Techniques and Indications for using PediGuard

Koller H. The Center of Rotation (COR) of Cervical 3-Column Osteotomies (3-CO) for
Correction of Cervical Kyphosis. Presented at the 32nd annual meeting of the Cervical Spine Research Society. May 2016, Praha, Tschech Republic.

Koller H.The Center of Rotation (COR) of Cervical 3-Column Osteotomies (3-CO) for Correction of Cervical Kyphosis. Presented at the annual IMAST in Washington/USA, 15. July 2016.

Koller H., W.Hitzl, MC.Marks, P.Newton – Harms Study Group. Best Prediction of Spontaneous Lumbar Curve Correction (SLCC) following Selective Thoracic Fusion in AIS using Logistic Regression Models and Clinical Rationale. Presented at SRS annuala meeting Praha / Hungary 2016.

Koller H. Update kindliche Skoliose: Diagnostische Notwendigkeiten und moderne Therapien 2016. 1. WS-Symposium Zentrum für Wirbelsäulen- und Skoliosetherapie Nürnberg Fürth, 26.11.2016.

Koller H. Cervicale sagittale Fehlstellung & Imbalance. Neue Parameter, Bewertung
und Therapieoptionen in 2016. 1. WS-Symposium Zentrum für Wirbelsäulen- und Skoliosetherapie Nürnberg Fürth, 26.11.2016.

Koller H., S. Decker, M. Bergoin, A. Hempfing, A. Tateen, O. Meier. Beckenkippung in die Konkavität der Lumbalen Nebenkrümmung – Untersuchung eines radiologischen Zeichens als potentieller Prädiktor der lumbalen Spontankorrektur bei selektiver thorakaler Fusion von Lenke 1 Krümmungen. Lecture # 31. Presented at German Spine Society Meeting, Decembre 2016

Koller H., M. Mayer, A. Hempfing, S. Decker, A. Tateen, J. Koller, W. Hitzl, L. Ferraris, O. Meier. Grenzen in der Behandlung von hochgradigen und rigiden Early-Onset Skoliosen (EOS) unter Einsatz von magnetisch kontrollierten Wachstumsstäben – eine klinisch-biomechanische Analyse.

Koller H., A. Hempfing, M. Mayer, A. Tateen, J. Zenner, L. Ferraris, O. Meier. Patientencharakteristik und Insertionsgenauigkeit von Pedikelschrauben beein ussen die Komplikationsrate bei langstreckigen Fusionen am cervicothorakalen Übergang (CTÜ). Lecture # 51. Presented at German Spine Society Meeting, Decembre 2016

Koller H., M. C. Marks, W. Hitzl, P. Newton, Bestmögliche Prädiktion der lumbalen Spontankorrektur nach dorsaler selektiver thorakaler Fusion in der Behandlung der idiopathischen Adoleszentenskoliose – ein Abgleich multivariater Regressionsmodelle und klinisch sinnvoller Kriterien. Lecture # 21. Presented at German Spine Society Meeting, Decembre 2016.

Koller H. Invited Speaker. Nuvasive Dinner session. Wachstumslenkende Chirurgie mit Magnetstäben (Magec-Rods) – Standordbestimmung 12 / 2016. Decembre 2016

Koller H. Preoperative patient characteristics and pedicle screw placement acuracy implact complications rates with fusion surgery at the cervicothoracic junction. Presented at 8th annual meeting of CSRS-Asian Pacific. 11th of March 2017, Kobe / Japan

Koller H. Der krumme Rücken – Gesundheitsgespräche der Schön Klinik 2017. Fürth, 9.5.2016

Decker, S, Mayer M, Hempfing A, Ernstbrunner L, Koller H. Flexibility of thoracic kyphosis (TK) impact postoperative sagittal alignment in adult spinal deformity patients. IMAST 2017, Capetown. Presentation #42.

Koller H., Hempfing A, Tateen A, Mayer M. Temporary Magnetic Controlled Growing Rods (MCGR) for the Treatment of Severe Scoliosis Provides Maximum Curve Correction and Spinal Height Restoration: A 6 Years Experience from First to Latest Case. 52nd annnual meeting of SRS, Philadelphia / USA. Paper # 50.

Koller H. and the CSRS. Klinische und radiologische Ergebnisse der operativen Behandlung von Patienten mit rigider zervikaler Kyphose: Ergebnisse einer multizentrischen Studie. V2, 12.Jahrestagung der DWG, Stuttgart, Dezember 2017.

Koller H. M. Mayer, A. Hempfing, O. Meier, B. Wiedenhöfer, J. Koller. Therapie der hochgradigen thorakalen Skoliose mit dem temporären Magnetstabverfahren – Analyse der ersten Behandlungen und 6-Jahres-Erfahrungen. V58, 12.Jahrestagung der DWG, Stuttgart, Dezember 2017.

S. Hartmann, R. Gmeiner, W. Schmölz, A. Tschugg, C. Thomé, Koller H. Der Effekt diverser Schrauben-Stab-Konfigurationen und multipler Schrauben-Stab-Konstrukte in der operativen Stabilisierung multisegmentaler zervikaler 3-Säuleninstabilitäten – eine biomechanische Analyse. Presented E-Poster at annual meeting of German Spine Society, Dez.2018. Wiesbaden / Germany.

G. Bodon, K. Kiraly, B. Hirt, Koller H. Der posterolateral subokzipitale Zugang zum Retroodontoidraum – Wie viel Knochenresektion ist erforderlich? Presented E-Poster at annual meeting of German Spine Society, Dez. 2018. Wiesbaden / Germany.

Koller H., M. Enercan, A. Hempfing, S. Decker, W. Hitzl, H. Mehdian, M. Mayer, L. A. Nasto, J. Koller, A. Hamzaoglu. Die Vorhersage der postoperativen Spontankorrektur der lumbosakralen Krümmung (LSK) in 101 adoleszenten Patienten mit idiopathischen kombinierten thorakolumbalen Skoliosen. Presented E-Poster at annual meeting of German Spine Society, Dez.2018. Wiesbaden / Germany.

L. Zhou, V. I. Shiratori, Koller H., O. Meier, A. Hempfing. Fusionsrate der dorso-ventralen Revisions-OP bei symptomatischer Pseudarthrose nach PLIF oder TLIF. Presented E-Poster at annual meeting of German Spine Society, Dez.2018. Wiesbaden / Germany.

A. Hempfing, Koller H., O. Meier, A. Tateen, L. Ferraris, M. Mayer, J. Koller, W. Hitzl.
Pseudoarthrose- und Revisionsrate nach lumbosakraler Fusion L5-S1 unter Einsatz 5 verschiedener Versorgungskonzepte  Presented E-Poster at annual meeting of German Spine Society, Dez.2018. Wiesbaden / Germany.

Koller H. Klassifikation & Diagnostik und allgemeine Therapieprinzipien von Hyperkyphosen. Basiskurs der DWG Modul 3 –Deformitäten. Karlsbad-Langensteinbach / Dtld. März 2019.