Ann Clin Case Rep | Volume 5, Issue 1 | Case Report | Open Access

Rotating Hinge Knee Prosthesis for Severe Valgus Knee Deformity: A Case Report

Ceyhun Çağlar1* and Hilal Yağar2

1Department of Orthopedics and Traumatology, Ankara City Hospital, Turkey 2Department of Orthopedics and Traumatology, Yozgat City Hospital, Turkey

*Correspondance to: Ceyhun Çağlar 

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Cases of valgus knee deformity are relatively rare and special cases in the orthopedic clinics. Especially severe deformities according to Keblish classification are challenging cases for orthopedic surgeons. These patients require a serious preoperative planning prior to surgery. Herein, we shared a our case with a 67-year-old woman with 45° valgus knee deformity with congenital hip dislocation on the right lower limb, which was classified as a severe deformity according to Keblish classification. Knee examination revealed 60° flexion and almost complete extension of right knee. As a result of our planning, we decided to use a Rotating Hinge Knee (RHK) prosthesis to maintain bone and soft tissue balance. The NexGen RHK prosthesis was preferred to correct deformity. Fracture of the medial femoral condyle occurred and fixed as intraoperative complication. The Knee Society Score (KSS) increased from 40 to 91. Patient stated that knee pain completely resolved and could be mobilized easily. RHK prosthesis is an important option for correction deformity in patients with severe valgus knee deformity. Long-term follow-up of these patients is needed to determine the success rate.


Osteoarthritis; Keblish classification; Valgus knee deformity; Knee society score; Rotating hinge knee prosthesis


Çağlar C, Yağar H. Rotating Hinge Knee Prosthesis for Severe Valgus Knee Deformity: A Case Report. Ann Clin Case Rep. 2020; 5: 1872.

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