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· DOS Abstracts
Short-term result of a pyrocarbon implant in the TMC
joint for osteoarthritis
Allan Ibsen Sørensen
Clinic of Hand Surgery, Sahlgrenska University Hospital
Background:
Different prostheses have been used for several decades in the
TCM joint with a high revision rate for some prostheses.
Purpose / Aim of Study:
To present short-term results of a Pyrocarbon im-
plant (Pyrocardan) in the trapezometacarpal joint (TMC).
Materials and Methods:
A pyro disc used as a spacer between first metacarpal
bone and trapezium bone. A cast used for 4 weeks followed by rehabilitation.
All patients were evaluated preoperatively, 6, 12 and 26 weeks postoperative-
ly and then yearly with ROM, grip strength, pinch, key-pinch, VAS scores for
pain, Quick- DASH and patients satisfaction. X-Ray performed preoperatively,
3 months postoperatively and thereafter yearly. Twenty-six patients operated
13 men and 13 woman. Mean age 60 years (45-79). Six additional operations
performed on other thumb, finger and wrist joints. One patient operated later
with arthrodesis in MP1 joint in same thumb.
Findings / Results:
Follow-up was 23 months (range 3-46). Radial abduction/
palmar abduction was preoperatively 38/38 degrees and at follow- up 41/41.
Opposition of thumb was 0 cm (0-3.5) versus 0.5 (0-5.5) postoperatively.
Grip strength in KgF preoperatively was 23 (range 6-50) and at follow-up 27
(7-48), p<0.05. Pinch/key-pinch (Kg) preoperatively 4.5/3.7 and at follow-up
5.0/5.6, (NS/NS). VAS pain (mm) was preop. at rest/activity: 48/80 and at fol-
low- up: 11/49, p<0.05. Radiographic migration of one implant. Quick DASH
preop.: 48 (16-86) and at follow-up; 28 (0-75) (p<0.01). Satisfaction (mm of
100) preop.: 20 (0-94) and at follow-up: 79 (5-100) (p<0.01). No infection.
One implant revised (3.8%).
Conclusions:
Short-term results with a pyrocarbon implant in the TMC joint
concerning pain, grip strength, Quick-DASH and patient satisfaction are favor-
able. Longer follow-up and a larger series of patients operated on with this new
technique is needed.
No conflicts of interest reported
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