Arthroscopic Assisted STT Arthrodesis for Kienb

Kienböck’s disease is characterized by avascular necrosis of the lunate that may proceed to sclerosis and collapse of the bone, wrist instability, and ultimately, end-stage arthrosis. Although considered a rare clinical entity, the disease often requires surgical treatment due to symptoms of progressive wrist pain and loss of function.

October 2022-october 2023, We performed arthroscopic STT arthrodesis for two patients with Kienböck's disease (IIIB) . Arthroscopic debridement for the wrist and STT joint, then we performed arthrodesis the STT joint with Kirschner wire fixation. X-ray films were taken at 1 month, 2 months and 3 months after operation. The Kirschner wire was pulled out after bone fusion of STT joint. The Wrist Mayo score was recorded preoperatively and 6 months postoperatively.

Both patients were followed up after operation. 2 months after operation, the STT joint had fused and the Kirschner wire was pulled out. Six months after surgery, the wrist Mayo scores were 60 and 55, respectively. The average score was 57.5.

Arthroscopic-assisted STT Arthrodesis is a common surgical method used to treat Kienböck’s disease. It involves removing the cartilage between the scaphoid-trapezium - trapezoid, and then fixing these two bones together to distribute pressure evenly in the wrist joint, reducing pain and discomfort for the patient.

Keywords: STT ,Kienböck’s disease,Arthrodesis