Hayrettin Kesmezacar is an orthopedist and Professor at Bilim University Medical Faculty. He specializes in shoulder and elbow surgery with training from the Hospital for Special Surgery in New York. Kesmezacar treats patients at Gayrettepe Florence Nightingale Hospital in Istanbul.

Specialization and Surgical Focus

Kesmezacar treats injuries and degenerative conditions of the upper limbs. He performs shoulder replacements and arthroscopic procedures for rotator cuff tears and shoulder instability. Arthroscopy is a minimally invasive technique using a small camera to visualize and repair joint tissues through tiny incisions.

His practice also involves treating orthopedic trauma. This includes treating displaced supracondylar humerus fractures and femoral neck fractures. He addresses various conditions such as shoulder ligament tears and frozen shoulder. This involves stiffness that limits the range of motion in the joint.

The physician treats shoulder and knee osteoarthritis, meniscus tears, and arthrosis. Additionally, he treats habitual dislocation of the shoulder and valgus deformity of the big toe. He also manages hip fractures and bone injuries.

Academic and Professional Roles

Kesmezacar has been a member of the orthopedic team at Gayrettepe Florence Nightingale Hospital since 2013. In 2024, he began serving as a Clinical Research Associate at Mount Sinai Hospital iCORE research unit in Toronto. He previously served as Associate Professor at Istanbul University–Cerrahpaşa starting in 2006.

Advanced Training and Education

Kesmezacar completed international training to refine his surgical techniques. He held a visiting fellowship at Cornell University Hospital for Special Surgery in 2004. In 2009, he completed another visiting fellowship at the University of Western Ontario in Canada. He earned his medical degree from Istanbul University in 1992 and completed his residency in 1997.

2024 – Clinical Research Associate (CRA) Certificate, Oxford College, Canada
2011 – Professor, Bilim University Medical Faculty
2006 – Associate Professor, Istanbul University, Cerrahpaşa Medical Faculty
2000 – Fellowship, Istanbul University, Cerrahpaşa Medical Faculty
1997 – Residency, Istanbul University, Cerrahpaşa Medical Faculty
1992 – Medical Degree, Istanbul University Medical Faculty

Research and Scientific Contributions

Kesmezacar has published research in journals including J Shoulder Elbow Surg and Arthroscopy. His academic work includes a long-term study tracking humerus fracture outcomes for 22.4 years. He also studied the morphology of the coracoacromial ligament and its relation to rotator cuff pathology. These findings help doctors understand the physical structures that lead to tendon tears in the shoulder.

His research covers functional outcomes for shoulder tumor prostheses and geriatric hip fracture mortality. The specialist also examined rotational malalignment after femoral shaft surgeries. Furthermore, he investigated the anatomy of elbow arthroscopy portals to improve patient safety during surgery.

Selected publications include:

"Outcome after the surgical treatment of the Dubberley type B distal humeral fractures"
"Functional outcome of reverse shoulder tumor prosthesis in the treatment of proximal humerus tumors"
"Medium-term natural history of subacromial impingement syndrome"
"Intraarticular injections for knee osteoarthritis"
"Bipolar or unipolar hemiarthroplasty after femoral neck fracture in the geriatric population"
"Treatment of hallux valgus by modified McBride procedure: a 6-year follow-up"

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