Bürgi M, Stoffel K, Bereiter H, Jacob. Radiological findings and clinical results of 102 Thrust-Plate hip prostheses - a follow-up of 2 to 8 years. SICOT/SIROT San Diago Convention Center, San Diego, CA, USA, August 2002.

Gago M, Frenk A, Stoffel K, Ulrich D. Locking Compression Plate: Screw configuration and biomechanical situation. AO Curse, Davos, December, 2002.

Ozturk H, Jones C, Stoffel K, Stachowiak G. The Effect of Surface Active Phospholipids on the Lubrication of Osteoarthritic Sheep Knee Joints: Friction. 6th International Tribology Conference – Austrib 02, Perth, WA, Australia, December, 2002.

Jones C, Ozturk H, Stoffel K, Stachowiak G. The Effect of Surface Active Phospholipids on the Lubrication of Osteoarthritic Sheep Knee Joints: Wear. 6th International Tribology Conference – Austrib 02, Perth, WA, Australia, December, 2002.

Stoffel K, Ulrich D, Stachowiak G, Gächter A, Kuster M. How can stability in internal fixators be controlled? A mechanical and Finite Element Analysis. Swiss Orthopaedic Association Congress, Bale, October 2003.

Stoffel K, Gächter A, Stachowiak G. Surfactant: der Durchbruch in der Behandlung der Gelenksarthrose? Swiss Orthopaedic Association Congress, Bale, October 2003.

Stoffel K, Ellenberger M, Gächter A, Nagel W. Eine seltene Ursache für Wadenkrämpfe beim Jungen: Klinik, Diagnostik, Therapie und Literaturübersicht des poplitealen Entrapmentsyndromes. Swiss Orthopaedic Association Congress, Bale, October 2003.

Stoffel K, Forster T, Stachowiak G, Gächter A, Kuster MS. Oblique screws at the plate end increases the fixation strength. Swiss Orthopaedic Association Congress, Bale, October 2003.

Boder P. Stoffel K, Bereiter H, Gächter A. Die sekundäre mediale Patellaluxation nach medialisierenden Operationstechniken an der Tuberositas tibiae. Swiss Orthopaedic Association Congress, Bale, October 2003.

Harder L, Stoffel K. The pull out strength of locked internal fixators and conventional plates. Poster; Swiss Orthopaedic Association Congress, Bale, October 2003.

Kessler M, Stoffel K, Gächter A.  Die SLAP-Läsions als Ursache eines glenolabralen Ganglions. Swiss Orthopaedic Association Congress, Bale, October 2003 and Jahreskongress der Deutschen Vereinigung für Schulter- und Ellbogenchirurgie, Köln, März 2004.

Wengler E, Stoffel K, Gächter A, Kuster MS. A new technique of subtrochanteric shortening osteotomy in total hip arthroplasty performed with the trust plate prosthesis for high riding congenital dislocation of the hip. Swiss Orthopaedic Association Congress, Bale, October 2003.

Kuster M, Stoffel K, Grob K, Forster Th. Clinical Experience with NCB – A new locking plate. Continuing Medical Education, Fremantle Orthopaedic Unit, The University of Western Australia, Fremantle, June, 2004.

Stoffel K, Jones C, Ozturk H, Stachowiak G, Kuster M. Surface active pospholipids reduce friction and wear in osteoarthritic sheep joints. Annual Scientific Meeting of the Australian Orthopaedic Association, Perth, September, 2004.

Stoffel K, Lorenz K, Grob K, Forster Th, Kuster M. The biomechanical advantages of internal fixators in plate osteosynthesis. Annual Scientific Meeting of the Australian Orthopaedic Association, Perth, September, 2004.

Kuster M, W. Bryceson, Stoffel K. The Non Contact Bridging Plate: A new advance in the osteosynthesis of osteoporotic fractures. Preliminary findings. Annual Scientific Meeting of the Australian Orthopaedic Association, Perth, September, 2004.

Stoffel K, Kuster M. Orthopaedic X-Ray Session – Common Fractures. 38th  Fremantle Postgraduate Medical Meeting. Fremantle, October, 2004.

Booth G, Stoffel K, Kuster M. Internal Fixation of experimental intraartikular calcaneus fractures: a biomechanical comparison of conventional and locking plates in cadaveric specimens. Annual Australian Orthopaedic Foot and Ankle Society Conference, Darwin, August, 2005.

Lorenz, K, Stoffel K, Kuster M. Biomechanical evaluation of current devices for the refixation of the greater trochanter. Annual Scientific Meeting AOA ASM, Perth, October, 2005.

Khorshid O, Stoffel K, Kuster M. The effect of high tibial osteotomy on patellofemoral pressure. A biomechanical study in human cadaveric knees. Annual Scientific Meeting AOA ASM, Perth, October, 2005.

Stoffel K, Kuster M. Current biomechanical concepts in plate osteosynthesis.  Invited Lecture at the University of Adelaide at the Royal Adelaide Hospital, Adelaide, South Australia, September, 2005.

Lim T, Billik B, Stoffel K. Sliding Hip Screw Fixation of fractures of the proximal femur: An analysis of the predictive factors of failure. Annual Scientific State Meeting AOA, Perth, March, 2006.

Cunnen S, Stoffel K, Kuster M. Biomechanical comparison of double-plate fixation in 90 º vs. 180 º for 2 different periarticular locking systems for distal humeral fractures in human cadavers. Annual Scientific State Meeting AOA, Perth, March, 2006.

Murray B, Stoffel K, Jarrett P, Kuster M. Volar vs dorsal locking plates in dorsally comminuted distal radius fractures: a biomechanical study. Annual Scientific State Meeting AOA, Perth, March, 2006.

Kinzel V, Jarrett P, Stoffel K. A Biomechanical Comparison of Scaphoid Fixation Grafting with Iliac Bone or Distal Radial Bone Grafts. Annual Scientific State Meeting AOA, Perth, August, 2006.

Jarrett P, Kinzel V, Stoffel K. Scaphoid Morphology – An Analysis of 28 Cadaver Scaphoids. Federation of European Societies for Surgery of the Hand ASM, Glasgow, June 2006.

Stoffel K. Trauma Update Meeting - New Design of Locking Plate – Trauma MIS Approaches.  Invited Lecture from the Taiwan Orthopaedic Association, March 2006.

Stoffel K, Lim T, Billik B. An analysis of the predictive factors of failure of the Sliding Hip Screw Fixation of fractures of the proximal femur. MOA-APOA Trauma Section combined Meeting, Kuala Lumpur, June, 2006.

Booth G, Stoffel K, Kuster M. A comparison of conventional versus locking plates in intraarticular calcaneus fractures: a biomechanical study in human cadavers. Annual Scientific State Meeting AOA, Perth, August, 2006.

Leys T, Stoffel K. Cement augmentation of hip screws. Annual Scientific State Meeting AOA, Perth, August, 2006.

Li-on L, Alan Kop, Stoffel K. Neck fracture of 4 Cobalt Alloy Hip Arthroplasty Femoral Components. Annual Scientific State Meeting AOA, Perth, August, 2006.

Jarrett P, Kinzel V, Stoffel K. Scaphoid bone density assessment – A Comparison of two measurement techniques. Annual Combined National Scientific Meeting AOA, Canberra, October, 2006.

Lim T, Stoffel K. Sliding Hip Screw Fixation of fractures of the proximal femur: An analysis of the predictive factors of failure. Annual Combined National Scientific Meeting AOA, Canberra, October, 2006.

Cunnen S, Stoffel K, Kuster M. Biomechanical comparison of double-plate fixation in 90 º vs. 180 º for 2 different periarticular locking systems for distal humeral fractures in human cadavers. Annual Combined National Scientific Meeting AOA, Canberra, October, 2006.

Murray B, Stoffel K, Jarrett P, Kuster M. Volar vs dorsal locking plates in dorsally comminuted distal radius fractures: a biomechanical study. Annual Combined National Scientific Meeting AOA, Canberra, October, 2006.

Kinzel V, Jarrett P, Stoffel K. A Biomechanical Comparison of Scaphoid Fixation Grafting with Iliac Bone or Distal Radial Bone Grafts. Annual Combined National Scientific Meeting AOA, Canberra, October, 2006.

Ioppolo J, Stoffel K, Roehrl S, Nivbrand J. Tibiofibular kinematics following ankle fracture fixation using RSA and single plane fluroscopy. Annual Combined National Scientific Meeting AOA, Canberra, October, 2006.

Stoffel K, Kuster M. Biomechanical considerations in plate osteosynthesis: the effect of plate to bone compession with and without angular stability of the screws. Annual Combined National Scientific Meeting AOA, Canberra, October, 2006.

Li-on L, Stoffel K, Mohindra R, Dayle R. Fatigue failure of a Cobalt-Alloy femoral taper. A report of four cases. Annual Combined National Scientific Meeting AOA, Canberra, October, 2006.

Booth G, Stoffel K, Kuster M. Internal Fixation of experimental intraarticular calcaneus fractures: a biomechanical comparison of conventional and locking plates in cadaveric specimens. Annual Combined National Scientific Meeting AOA, Canberra, October, 2006.

Jarrett P, Kinzel V, Stoffel K. A Biomechanical Comparison in Human Cadavers between Scaphoid Fracture Fixation and Grafting with Iliacal Bone versus Distal Radial Bone. 10t Triennial Congress of the International Federation of Societies for Surgery of the Hand, Sydney, March 2007.

Stoffel K. First clinical results with the PFN A. Synthes Annual Sales Conference, Launceston, Tasmania. January 2007.

Stoffel K. Key-point to understand the Locking Plates. Synthes Annual Sales Conference, Launceston, Tasmania. January 2007.

Stoffel K. Concept of Mechano-Biology in Fracture Management. Invited Lecture at Silver Jubilee Annual Conference of Gujarat Orthopaedic Association, Goacon, India. February, 2007.

Stoffel K. How to use Locking Plates. Invited Lecture at the Striker Annual Trauma Meeting, Perth, March, 2007

Lim T, Stoffel K, Bilik B, Yates P. Sliding Hip Screw Fixation of Extracapsular Fractures of the Proximal Fracture: An Analysis of the Predictive Factors of Failure. 37th Annual General Meeting of the Malaysian Orthopaedic Association & 14th International Musculosceletal Laser Society (IMAS) Congress, Awana Porto Malai, Langkawi, Kedah, Malaysia, May 2007.

Stoffel K, Yates P. Periprosthetic Fracture fixation around TKA using a polyaxial locking plate. 5th Annual Meeting Asia pacific Orthopaedic Association (APOS), Bangkok, June 2007.

Yates P, Stoffel K. Arthroplasty for subcapital neck of femur fractures.  5th Annual Meeting Asia pacific Orthopaedic Association (APOS), Bangkok, June 2007.

Friedrich L, Page R, Yates P, Stoffel K. The use of a Visual Hand Chart to aid in the description of acute hand injuries. Annual Scientific Service Registrar Meeting, CTEC, Perth, April, 2007

Khoo P, Stoffel K, Yates P. Characteristics of periprosthetic fractures around polished collarless cemented stems with triple vs. double tapers. Annual National Scientific Meeting AOA, Gold Coast, October, 2007.

Stoffel K, Flivik G, Yates P, Nicholls R. Intraosseous blood flow of the subluxed or everted patella during total knee arthroplasty. Annual National Scientific Meeting AOA, Gold Coast, October, 2007.

Aldrige O, Marshall A, Taylor P, Stoffel K. An audit of a clinical pathway guiding management of patients with proximal femur fractures. Annual National Scientific Meeting AOA, Gold Coast, October, 2007.

Wysocki D, Yates P, Stoffel K. Reliability of the intra-operative assessment of injuries of the ankle syndesmosis: A cadaveric study.  Annual National Scientific Meeting AOA, Gold Coast, October, 2007.

Stoffel K, Wysocki D, Yates P. Reliability of the intra-operative assessment of injuries of the ankle syndesmosis: A cadaveric study. Combined Australian & New Zealand Orthopaedic Foot & Ankle Society Conference, Cairns, August, 2007.

Angus K, Stoffel K, Yates P. Early Clinical and Radiographic Results of the Proximal Femoral Nail A (PFNA). Annual State Scientific Meeting AOA, Bunker Bay, August, 2007.

Baddour E, Stoffel K, Day R. How can we reduce implant stress in bridging plate osteosynthesis? Annual State Scientific Meeting AOA, Bunker Bay, August, 2007.

Khoo P, Stoffel K, Yates P. Characteristics of Periprosthetic Fractures Around Polished Collarless Cemented Stems with Triple Versus Double Tapers. Annual State Scientific Meeting AOA, Bunker Bay, August, 2007.

Lawson-Smith M, Schweiger K, Gueorguiey B, Stoffel K. Investigation of a new locking bolt in the expert tibial nail. Annual State Scientific Meeting AOA, Bunker Bay, August, 2007.

Nicholls R, Winata A, Dempsey A, Lloyd D, Kirk B, Stoffel K.  Does the use of ankle tape affect loading in the lower limb? Annual Meeting of the Australian Association for Exercise and Sport Science, Melbourne 27-30 March, 2008

Stoffel K, Leys T, Damen N, Rochelle N, Kuster M. A new technique for cement augmentation of the sliding hip screw in proximal femur fractures. 9th EFFORT Congress, Nice 28-30 May, France, 2008

Stoffel K, Shan Lim T, Billik B, Yates, P. Dynamic hip screw (DHS) Fixation of extracapsular proximal femur fractures - predictive factors of failure in a series of 567 cases. 9th EFFORT Congress, Nice 28-30 May, France, 2008

Stoffel K, Lorenz KU, Kuster M. Biomechanical considerations in plate osteosynthesis: the effect of plate to bone compression with and / or without angular stability in shaft and distal intraarticular femur fractures. 9th EFFORT Congress, Nice 28-30 May, France, 2008

Taylor P, Stoffel K, Rasmussen J. A computational Model of Clavicle Fracture Fixation. 16th Annual Symposium of Computational Methods in Orthopaedic Biomechanics, San Francisco, March, 2008

Stoffel Karl. Biomechanics of Locking Plates. AO Meeting: Between Nostalgia and Future. 50 Years AO, Biel, Switzerland, November, 2008

Stoffel K. The diabetic foot: conservative and operative treatment options from an orthopaedic point of view. Symposium, Chur, 3 Dec, 2008

Eriksson B et al., Contributing investigator. Rivaroxaban vs Enoxaparin for Thromboprophylaxis after hip arthroplasty. Eriksson B, et al NEJM 2008; 358 (26): 2765-76.

Schwieger K, Gueorguiev B, Lawson-Smith M, Windolf M, Stoffel K. Biomechanisches Potential winkelstabiler Marknagelverriegelung bei distalen Tibiafrakturen. 72. Deutscher Kongress für Orthopädie und Unfallchirurgie; 22-25 Okt, Berlin, 2008.

Wysocki D,  Stoffel K, Baddour E, Yates P. Reliability of the Intra-operative Assessment of Injuries of the Ankle Syndesmosis - A Cadaver Study. American Academy of Orthopaedic Surgeons (AAOS) 2009 Annual Meeting. Las Vegas, Nevada, February, 2009.

Stoffel K, Flivik G, Nicholls G, Yates P. Intraosseous Blood Flow of the Everted or Laterally - Retracted Patella During Total Knee Arthroplasty. American Academy of Orthopaedic Surgeons (AAOS) 2009 Annual Meeting. Las Vegas, Nevada, February, 2009.

Stoffel K. Current concepts of pilon fracture treatment. Invited lecture. Swiss Orthopaedic Society. Annual Meeting, Geneva, June, 2009

Stoffel K, Lim TS, Billik B, Yates P. Dynamic hip screw (DHS) fixation of extracapsular proximal femur fractures – predictive factors of failure in a series of 567 cases. Swiss Orthopaedic Society. Annual Meeting, Geneva, June, 2009

Stoffel K, Lorenz KU, Kuster MS. Biomechanical considerations in plate osteosynthesis: the effect of plate-to-bone compression with and without angular screw stability. Swiss Orthopaedic Society. Annual Meeting, Geneva, June, 2009.

Kampshof J, Stoffel K.  Periprosthetic fractures – which screw can be used in cement. Australian Orthopaedic Association (AOA) 2009. Annual Meeting, Cairns, Queensland, October, 2009.

Stoffel K. Alpinism and Osteoarthritis. Invited Lecture. Society of Swiss Traumatology and Sports medicine (GOTS). Annual Meeting, Engelberg, July, 2009

Stoffel K. What should I know about biomechanics. Invited Lecture. AO Course Davos,  Dec 2009

Stoffel K. A new classification for periprosthetic fractures around the femur. Invited Lecture. Jubilee Meeting 30 Years Orthopaedics Münsterlingen, Switzerland, Nov 2009

Stoffel K, Nicholls R, Gunnar F, Yates P. Patella relocation technique affects intraosseous blood flow during total knee arthroplasty. 10th EFFORT Congress, Barcelona, June, Spain 2010

Stoffel K, Nicholls R, Winata A, Dempsey A, Boyle J, Lloyd D. The effect of ankle taping on loading at the ankle and proximal joints. Medicine and Science in Sport and Exercise. 10th EFFORT Congress, Barcelona, June, Spain 2010

Buergi M, Stoffel K, Bereiter H. Bipolar Head Prostheses of the Hip in Young Patients – Long-term Results. 10th EFFORT Congress, Barcelona, June, Spain 2010

Giesinger K, Yates P, Stoffel K, Ebneter L, Day R, Kuster MS. ‚Can plate osteosynthesis of stable femoral periprosthethic fractures cause early cement mantle failure around the hip stem? A biomechanical evaluation. Swiss Orthopaedic Society. Annual Meeting, St.Gallen July , 2010

Attinger M, Bereiter H, Stoffel K. Early clinical and radiological outcome of total hip replacement with the short uncemented Fitmore stem. Swiss Orthopaedic Society. Annual Meeting, St.Gallen July , 2010

Stoffel K. Osteoporotic fractures: A serious problem of the future or a problem with a future? Swiss Orthopaedic Society. Annual Meeting, Invited Lecture, St.Gallen July , 2010

Buergi M, Stillhard P, Stoffel K. Grade III AC-joint injuries – is operative treatment still justifiable? 10th EFFORT Congress, Barcelona, June, Spain 2010

Stoffel K. Biomechanical rules in plate osteosynthesis. AOT  Symposium 10th EFFORT Congress, Barcelona, June, Spain 2010     

Thalmann C, Stoelzle T, Stoffel K. Distal femoral cortical hypertophy of the Fitmore cementless tapered stem within the first year: Incidence, risk factor analysis and clinical implication. Swiss Orthopaedic Society. Annual Meeting, Lausanne, June, 2011

Buehler G, Grehn H, Stoffel K. Pertrochanteric femur fracture after Durom® Resurfacing Hip Arthroplasty - Our Solution. Swiss Orthopaedic Society. Annual Meeting, Lausanne, June, 2011

Gonzales A, Grehn H, Stoffel K. Uncommon complication: The long way of a Spina scapulae fracture during mini open rotator cuff repair – A case report. Swiss Orthopaedic Society. Annual Meeting, Lausanne, June, 2011

Thalmann C, Meier G, Bereiter H, Stoffel K. Tibial bone cyst after total knee arthroplasty with screw fixation of the tibial component. Swiss Orthopaedic Society. Annual Meeting, Lausanne, June, 2011

Attinger M, Buergi M, Bereiter H, Stoffel K. Early clinical and radiological outcome of total hip replacement with the short uncemented Fitmore stem. Swiss Orthopaedic Society. Annual Meeting, Lausanne, June, 2011

Attinger M, Molnar L, Bereiter H, Stoffel K. Rupture of the popliteal artery complicating medial opening wedge high tibial osteotomy. Swiss Orthopaedic Society. Annual Meeting, Lausanne, June, 2011

Erhardt J, Khoo P, Yates P, Stoffel K. Periprosthetic fractures around polished collarless cemented stems: triple – versus double tapers. Swiss Orthopaedic Society. Annual Meeting, Lausanne, June, 2011

Hutter R, Stoffel K. Atypical low-energy subtrochanteric femoral fractures in patients on Bisphosphonates therapy: A report of two cases and review of the literature. Swiss Orthopaedic Society. Annual Meeting, Lausanne, June, 2011

Acklin, Y.P, Stoffel K, Sommer C. Clinical outcome after minimal invasive plate osteosynthesis for proximal humerus fractures. Swiss Society for Surgery. Annual Meeting, Geneva, May, 2011

Acklin, Y.P, Stoffel K, Sommer C. Clinical outcome after minimal invasive plate osteosynthesis for proximal humerus fractures. European Society for Trauma and Emergency Surgery. Annual Meeting, Milano, April, 2011

Stoffel K. Periprosthetic fractures around the hip. Annual Meeding Indian Orthopaedic Association MOACON, Invited lecture, Kuolhapur, Nov 2011.

Michelitsch C, Müller TS, Stoffel K, Sommer C. Locking compression plate fixation for supracondylar periprosthetic fracture of the distal femur after total knee arthroplasty. European Congress for Trauma and Emergency Surgery, Basel, May 2012

Thalmann C, Bereiter H, Stoffel K. Distal Femoral Cortical Hypertrophy Using The Fitmore Stem©: A Two Year Follow Up Regarding Incidence, Development And Clinical Implications. Swiss Orthopaedic Society. Annual Meeting, Basel, June , 2012

Kampshoff J, Stoffel K, Yates P, Kuster M. Periprosthetic fractures – which screw can be used in the cement. J Bone Joint Surg, Vol. 94-B no. Supp XXIII 220, 2012

Stoffel K. Biphosphonate fractures. Annual Meeting Australian Orthopaedics Association, Trauma COE. Invited lecture, Melbourne May 2013

Stoffel K. Salvage procedure of failed DHS. Annual Meeting Australian Orthopaedics Association, Trauma COE. Invited lecture, Melbourne May 2013

Stoffel K. Arthroplasty versus internal fixation for periprosthetic fractures around the hip. 2nd AOTrauma Asia Pacific Scientific. Seoul Korea May 2014

Stoffel K. How to handle complex proximal humerus fractures: Tipps and Tricks. Indonesian Trauma Meeting; Management on upper extremity Trauma. Malang February 2014

Oh JK, Schneider K, Zderic I, Stoffel K, Nork S, Gueorguiev B. What is the underlying mechanism for the failure mode observed in the Proximal Femoral Locking Compression Plate? A Biomechanical Study. 2nd AOTrauma Asia Pacific Scientific Congress. Seoul Korea May 2014

Jenni R, Acklin YP, Bereiter H, Stoffel K. Prospective clinical and radiostereometric (RSA) results of 24 Fitmore Hip Stems after 2 years follow up. Swiss Orthopaedic Society. Annual Meeting, St.Gallen, June, 2014

Papineau JL, Stoffel K, Bauer S, Hayes A, Day R, Kuster M. Biomechanical Assessment of the combination of rigid and dynamic fracture fixation for the same fracture location. Annual Scientific Meeting of the Western Australian Orthopaedic Association, Bunker Bay, Sept 2014

Gueorguiev B, Camino G, Zderic I, Richards G, Sancineto C., Stoffel K, Barla J, Windolf M. Kann eine Angulation der distalen Schrauben ein Ausreißen der Platte bei Versorgung mittels dynamischer Hüftschraube (DHS) verhindern? Eine biomechanische Studie. Deutscher Kongress für Orthopädie und Unfallchirurgie. Berlin, Oktober 2014

Stoffel K. Acetabular stress shielding in total hip arthroplasty. 1st International Hip community Convention 2014, Lucern, Oct, 2014

Stoffel K. The history of isoelasticity and RM technology in total hip arthroplasty. 1st International Hip community Convention 2014, Lucern, Oct, 2014

Bauer S, Kuster M Stoffel K. Is the combination of rigid and dynamic fracture fixation a contraindication? A biomechanical study. 74th Annual Scientific Meeting of the AOA, Melbourne, Oct 2014

Sands A, White C, Blankstein M, Zderic I, Ernst M, Windolf M, Richards RG, Stoffel K, Gueorguiev B. Assessment Of Ankle And Hindfoot Stability And Joint Pressures Using A Human Cadaveric Model Of A Large Lateral Talar Process Excision. A Biomechanical Study. 16th EFORT Congress. Prague, Tschekoslowakei, May 2015.

Stoffel K, Sommer C, Kalampoki V, Sebald A, Joeris A. Improved outcomes after the treatment of periprosthetic hip and interprosthetic femur fractures with minimal invasive techniques and recent implants?—a systematic literature review of 1571 cases. 16th European Congress of Trauma and Emergency Surgery. Amsterdam, Holland, May 2015

Stoffel K. Periprosthetic fractures around shoulder and elbow prosthesis. Invited lecture at AO Trauma Europe Master Course – Periprosthetic Fractures. Barcelona, Spain, 6-7.March 2015

Stoffel K, Zderic I, Sommer C, Eberli U, Mueller D, Oswald M, Gueorguiev B. Biomechanical evaluation of femoral neck fracture fixation with the new femoral neck system compared to diverse standard implants for osteosynthesis. 21st Congress of the European Society of Biomechanics, Prague, Tschekoslowakei, July 5 - 8 2015

Rieger B, Bolliger L, Stoffel K, Ilchmann T, Clauss M. Mid-Term Results Of A Modular Cementless Revision Stem (Revitan). 16th EFORT Congress. Prague, Tschekoslowakei, May 2015.

Siepen W, Zwicky L, Stoffel K, Ilchmann T, Clauss M. Prospective Two-Year Subsidence Analysis of 100 Cemented Polished Straight. Stems16th EFORT Congress. Prague, Tschekoslowakei, May 2015.

Lenz M, Stoffel K, Kielstein H, Hofmann G, Gueorguiev B. Potenzial der Plattenverankerung im großen Trochanter bei periprothetischen  Femurfrakturen Vancouver Typ B1. Deutscher Kongress für Orthopädie und Unfallchirurgie. Berlin , Deutschland, Oktober 2015.

Lenz M, Stoffel K, Kielstein H, Hofmann G, Gueorguiev B. Anterolaterale Doppelplatte oder verriegelbarer Plattenaufsatz bei periprosthetischen Femurfrakturen Typ Vancouver B1? – Eine biomechanische Studie. Deutscher Kongress für Orthopädie und Unfallchirurgie. Berlin , Deutschland, Oktober 2015.

Stoffel K, Zderic I, Sommer C, Eberli U, Mueller D, Oswald M, Gueorguiev B. Biomechanische Beurteilung der Fixation von Schenkelhalsfrakturen mit dem neuen Femoral Neck System im Vergleich zu Drei Durchbohrten Schrauben, DHS-Klinge und DHS mit Antirotationsschraube. Deutscher Kongress für Orthopädie und Unfallchirurgie. Berlin, Deutschland, 20. – 23. Oktober 2015.

Stoffel K, Zderic I, Sommer C, Eberli U, Mueller D, Oswald M, Gueorguiev B. The new Femoral Neck System for femoral neck fracture fixation. Biomechanical performance in comparison to diverse standard implants for osteosynthesis. SICOT Orthopaedic World Congress, Guangshou, China, 17-19 September 2015

Stoffel K, Zderic I, Sommer C, Eberli U, Mueller D, Oswald M, Gueorguiev B. Biomechanical evaluation of femoral neck fracture fixation with the new Femoral Neck System compared to diverse standard implants for osteosynthesis. Annual congress of European Society of Biomechanics, Prague, Tschekoslowakei, 5-8 July 2015

Stoffel K. ORIF of Periprosthetic proximal Femur fractures: Whats new ? Tipps and Tricks. Invited lecture. 16th European Congress of Trauma and Emergency Surgery, Amsterdam, Holland, 10-12 May 2015

Stoffel K. Indirekte Repositionshilfe bei subtrochantären Femurfrakturen zur Marknagelosteosynthese. AO Frühjahrstagung 2015, Fischingen, Schweiz 8.Mai

Thalmann C, Bereiter H, Stoffel K. 5 Year Follow Up in Using The Fitmore Stem©: General Results And Further Development And Clinical Implications Of Distal Femoral Cortical Hypertrophy. Swiss Orthopaedic Society. Annual Meeting, Basel, June , 2015

1Rieger B, Bolliger L, Stoffel K, Ilchmann Th, Clauss M. Mid-Term Results Of A Modular Cementless Revision Stem (Revitan) . Swiss Orthopaedic Society. Annual Meeting, Basel, June , 2015

Siepen W, Zwicky L, Stoffel K, Ilchmann Th, Clauss M. Prospective two-year subsidence analysis of 100 cemented polished straight stems. Swiss Orthopaedic Society. Annual Meeting, Basel, June , 2015

Hutter R, Zdravkovic V, Bereiter H, Grehn H, Stoffel K. Impact of operation technique in total knee arthroplasty: Gap balancing (tibia first) versus measured resection technique (femur first) . Swiss Orthopaedic Society. Annual Meeting, Basel, June , 2015

Stoffel K. Periprosthetic fractures around the hip. Invited Lecture, Vereniging voor Orthopedisch Chirurgisch Assistenten, Amsterdam, November, 2015

Stoffel K, Zderic I, Sommer C, Eberli U, Mueller D, Oswald M, Gueorguiev B. The new Femoral Neck System for femoral neck fracture fixation. Biomechanical performance versus diverse standard implants for osteosynthesis. 17th Congress of the European Society for Trauma and Emergency Surgery (ECTES), April, Vienna, 2016.

Stoffel K. Pathologische Frakturen bei Bisphophonaten. Invited Lecture,  Kongress für Alterstraumatologie, Marburg, März, 2016.

Gueorguiev B, Filipov O, Stoffel K, Sommer C. Filipov's method of biplane double-supported screw fixation extremely reduces the risk of fixation failure in femoral neck fractures. Clinical outcomes in 207 patients. DGOU, Berlin, Oct. 2016

Lenz M, Stoffel K, Kielstein H, Hofmann G, Gueorguiev B. Proximal plate fixation in periprosthetic femoral shaft fractures – trochanteric hook or bicortical embracement? A biomechanical study. DGOU, Berlin, Oct. 2016

Filipov O, Stoffel K, Gueorguiev B, Sommer  C.  Filipov's method of biplane double-supported screw fixation extremely reduces the risk of fixation failure in femoral neck fractures. Clinical outcomes in 207 patients. 15th Biennial Conference of the ISFR (International Society of Fracture Repair), Munich, Germany, June 2016

Lenz M, Stoffel K, Gueorguiev B, Kielstein H, Hofmann G. Biomechanical Potential Of Double Plating Versus Single Lateral Plating In Periprosthetic Femur Fractures. EFORT, Geneva, June, 2016

Lenz M, Stoffel K, Kielstein H, Majo K, Hofmann G. Gueorguiev B.  Longer Plate Or Bicortical Locking?-A Biomechanical Comparison Of Two Techniques For Periprosthetic Femur Fracture Fixation. EFORT, Geneva, June, 2016

Siepen W, Hurni B, Clauss M, Stoffel K. Results and difficulties in the first 6 months of a newly founded comanaged orthogeriatric fracture unit. Alterstraumatologie Kongress, Marburg, March, 2016

Stoffel K. Worst Case Sezenarios in Biphosphonate Fractures. Invited lecture. Alterstraumatologie Kongress, Marburg, March, 2016

Lenz M, Stoffel K, Mayo K, Kielstein H, Hoffmann G, Gueorguiev B. Influence of Bone Mineral Density in fracture fixation of the greater trochanter. A biomechanical study. DGOU, Berlin, Oct. 2016

Stoffel K. Epidemiology, risk factors, challenges, outlook and classification of periprosthetic hip fractures. Invited Lecture AOTrauma / AORecon Session—Periprosthetic fractures after THA. EFORT, Geneva, June, 2016

Stoffel K, Zderic I, Sommer S, Eberli U, Mueller D, Oswald M, Gueorguiev B. The new Femoral Neck System for femoral neck fracture fixation. Biomechanical performance versus diverse standard implants for osteosynthesis. European Orthopaedic Research Society (EORS), Bologna, September, 2016

Lenz M, Stoffel K, Mayo K, Kielstein H, Hoffmann G, Gueorguiev B. Fixation of periprosthetic fractures – trochanteric hook or subtrochanteric bicortical locking screws? ESB, Lyon, France, July 2016

Lenz M, Stoffel K, Mayo K, Kielstein H, Hoffmann G, Gueorguiev B. The potential of plate fixation in the greater trochanter, 15th Biennial Conference of the ISFR (International Society of Fracture Repair), Munich, Germany, June, 2016

Stoffel K. Bone preservation: how does biomechanics improve the function and outcome of prosthesis. Moderator of Symposium Invited Lecture AOTrauma / AORecon Session—Periprosthetic fractures after THA. EFORT, Geneva, June, 2016

Stoffel K. Invited lecture: Short stems in total hip arthroplasty: Early experience with the Optimys stem. Wintherthur, Switzerland, June, 2016

Stoffel K. Invited Lecture. Femoral head fractures: Fixation Strategies. Annual Congress of the Indian Trauma Association; Traumacon, Mumbai, August 2016

Stoffel K. Invited Lecture. Development, rationale & future of Locking plates. Annual Congress of the Indian Trauma Association; Traumacon, Mumbai, August 2016

Stoffel K. Invited Lecture. Periprosthetic and periimplant fractures around the knee. Annual Congress of the Indian Trauma Association; Traumacon, Mumbai, August 2016

Stoffel K. Invited Lecture. Periprosthetic and periimplant fractures around the schoulder and elbow. Annual Congress of the Indian Trauma Association; Traumacon, Mumbai, August 2016

Stoffel K. Invited Lecture. Cement augmentation using the new TFNA. Annual Congress of the Indian Trauma Association; Traumacon, Mumbai, August 2016

Stoffel K. Invited Lecture. Evaluation and management of Pilon Fractures: Annual Congress of the Indian Trauma Association; Traumacon, Mumbai, August 2016

Stoffel K. Invited Lecture. Atypical fractures: Fixation Strategies. Annual Congress of the Indian Trauma Association; Traumacon, Mumbai, August 2016

Stoffel K. Invited Lecture. Complications of locking plates. Annual Congress of the Indian Trauma Association; Traumacon, Mumbai, August 2016

Stoffel K. Invited Lecture. Biomechanical principles in fracture stabilization - When and how can I mix principles? Annual Congress of the Indian Trauma Association; Traumacon, Mumbai, August 2016

Stoffel K. Invited Lecture. Joint preservation in hips. 39th Annual Meeting of the Singapore Orthopaedic Association, Singapore, October 2016

Stoffel K. Invited Lecture. Duo Mobility in Revision Arthroplasty. 39th Annual Meeting of the Singapore Orthopaedic Association, Singapore, October 2016

Stoffel K. Invited Lecture. Assessing the patient with peri-prosthetic fractures of the hip and knee: history, exam and imaging. 39th Annual Meeting of the Singapore Orthopaedic Association, Singapore, October 2016

Stoffel K. Invited Lecture. Technique of osyeosynthesis in periprosthetic fractures of the hip and knee. 39th Annual Meeting of the Singapore Orthopaedic Association, Singapore, October 2016

Stoffel K. Invited Lecture. Stem fixation in Europe: Trends and Challenges. The 47th Annual Meeting of Japanese Society for Replacement Arthroplasty. Date: 24-25 February 2017. Okinawa Convention Center, Okinawa, Japan

Stoffel K. Inivted Lecture: Sehnenverletzungen im Sport: Hamstrings und sonstige Sehnenverletzungen der Hüfte. Forum for Advanced Medical Education. Basel, April, Switzerland.

odorov D, Zderic I, Stoffel K, Richards G, Lenz M, Enchev D, Gueorguiev B. Is Augmented LISS Plating Biomechanically Advantageous In Comparison To Conventional LISS Plating? 18th EFORT Congress. Vienna, Austria. June 2017.

Stoffel K. Symposium: Current Challenges In Joint Arthoplasty And Possible Solutions: Bone Preservation: A Solution For Individual Reconstruction Of The Patients Anatomy. 18th EFORT Congress. Vienna, Austria. June 2017.

Stoffel K. Invited Lecture. Advanced Course In Total Hip Replacement: Principles Of Internal Fixation Of Periprosthetic Fractures. 18th EFORT Congress. Vienna, Austria. June 2017.

Thalmann C, Bereiter H, Postler, A, Günther KP, Cattaneo G, Camera A, Kluge W, Grogan R, Chotta S, Goetze  C, Stoffel K. Short Stem: 5-Years Experience With The FitmoreTM Stem – A Prospective Multi-Centre Clinical Follow-Up Study. 18th EFORT Congress. Vienna, Austria. June 2017.

Todorov D, Zderic I, Stoffel K, Richards G, Lenz M, Enchev D, Gueorguiev B. Biomechanical Investigations of augmented vs conventional Liss Plating of distal femoral fractures. 23 Congress of the European Society of Biomechanics, Seville, Spain, June 2017.

D.Todorov, B.Gueorguiev, I.Zderic, K.Stoffel, R.G.Richards, M.Lenz, D.Enchev, A.Baltov, Biomechanical comparison of augmented locking plate fixation verus conventional locking plating, EORS, Munich, Germany, September 2017

D.Todorov, B.Gueorguiev, I.Zderic, K.Stoffel, R.G.Richards, M.Lenz, D.Enchev, A.Baltov, Are there biomechanical benefits in augmentation of LISS plating compared to conventional LISS plating? Kuentscher Society, Osteosynthese International 2017, Munich, Germany, September 2017

Stoffel K. Invited Lecture. New concepts in the treatment of femoral neck fractures. 5th US AOTK Symposium, Seattle, USA, September 2017

Stoffel K. Invited Lecture. Periprosthetic femur fracture fixation: “Recon view”. 5th US AOTK Symposium, Seattle, USA, September 2017

Stoffel K. Invited Lecture. The great hip debate: Femoral head size: Bigger is better? 5th Indonesian Hip and Knee Society annual Scientific Meeting, Jakarta, Indonesia, August 2017 

Stoffel K. Invited Lecture. An update on patella fracture fixation. 5th Indonesian Hip and Knee Society annual Scientific Meeting, Jakarta, Indonesia, August 2017 

Stoffel K. Invited Lecture. Reduction and Fixation Principles in Periprosthetic Femur Fractures. 5th Indonesian Hip and Knee Society annual Scientific Meeting, Jakarta, Indonesia, August 2017 

Stoffel K. Invited Lecture. Cement augmentation of the neck screw in proximal femur fractures: a case based lecture. 5th Indonesian Hip and Knee Society annual Scientific Meeting, Jakarta, Indonesia, August 2017 

Stoffel K. Invited Lecture. Evidence Based Management of Subtrochanteric Fractures. 5th Indonesian Hip and Knee Society annual Scientific Meeting, Jakarta, Indonesia, August 2017 

Stoffel K. Invited Lecture. Periprosthetic Fractures Around the Hip: Is the stem loose? 5th Indonesian Hip and Knee Society annual Scientific Meeting, Jakarta, Indonesia, August 2017 

Stoffel K. Invited Lecture. Why do cups fail? Challenges on the acetabular side. Congress Sociedad Espanola de Cirugia Ortopedica y Traumatologia (SECOT). Barcelona, Spain, September 2017

Stoffel K. Invited Lecture. Stress shielding on the acetabular side – it is an issue? Congress Sociedad Espanola de Cirugia Ortopedica y Traumatologia (SECOT). Barcelona, Spain, September 2017

Stoffel K. Invited Lecture. Unmet needs in periprosthetic fracture fixation. 12th European AOTK Expert’s Symposium, Mainz, November 2017

Stoffel K. Invited Lecture. An algorithm how to treat neck of femur fractues: Existing and new concepts. 12th European AOTK Expert’s Symposium, Mainz, November 2017