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Updated: May 17, 2026
Metacarpal Small Incision for Carpal Tunnel Syndrome
Published on: April 5, 2024
Four-corner arthrodesis concentrator of nickel-titanium memory alloy for carpal collapse: a report on 18 cases
Yong-qing Xu1, Bao-chuang Qi, Xin-yu Fan
1Department of Orthopedic Surgery, Kunming General Hospital, Kunming, China.
Purpose:
To evaluate the treatment of carpal collapse using a four-corner arthrodesis concentrator of nickel-titanium memory alloy.
Methods:
From August 2006 to August 2010, 18 patients with carpal collapse had scaphoid excision and four-corner (capitate, lunate, triquetrum, and hamate) arthrodesis using a nickel-titanium memory alloy four-corner arthrodesis concentrator. The mean follow-up time was 30 months (range, 12-48). Various wrist parameters, including grip strength, wrist motion, and degree of pain were recorded and compared before and after surgery.
Results:
The average fusion time was 2.3 months (range, 2-4). Neither nonunion nor wound infection was found in any of the patients. At one year follow-up, the grip strength had reached 80% of that of the healthy side, whereas the range of motion was greater than 50% of the contralateral side. After the surgery, the mean pain scores were improved.
Conclusions:
Four-corner arthrodesis using a nickel-titanium memory alloy four-corner arthrodesis concentrator effectively treated carpal collapse and preserved most wrist function.
