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· DOS Abstracts
Short-term result of a pyrocarbon implant in the STT
joint for osteoarthritis
Allan Ibsen Sørensen, Peter Axelsson , Jonny Andersson
Clinic of Hand Surgery, Sahlgrenska University Hospital
Background:
Only one pilot study have been presented in 2006 of a Scaph-
oid Trapezium Pyrocarbon Implant (STPI) in the scaphoid-trapezium- trapezoid
(STT) joint.
Purpose / Aim of Study:
In a prospective study to present our short- term
results of a STPI implant in the STT joint in patients with osteoarthritis.
Materials and Methods:
Postoperatively a cast was used for four weeks fol-
lowed by rehabilitation. All patients were evaluated preoperatively six, 12 and
26 weeks postop. and then yearly with ROM, grip strength, pinch, key-pinch,
VAS scores for pain, Quick-DASH, PRWE and patients satisfaction. X-Ray per-
formed preop., 3 months postop. and thereafter yearly. Twenty-eight patients
were operated on, 11 men and 17 women. Mean age was 63 years (51-78).
Findings / Results:
Mean follow-up was 24 months (range 3- 48). Extension/
flexion of the wrist was preop. 54/60 degrees and at follow-up 54/60 and
radial/ulnar flexion preop. 19/41 and at follow-up 14/42. Radial abduction/
palmar abduction of the CM1 joint was preop. 42/43 degrees and at follow-up
41/45. Opposition of thumb preoperatively 0.6 cm and postop. 0.1 cm. Grip
strength not affected by the procedure, 24 Kg respectively 24 kg. Pinch/key-
pinch (Kg) preop.: 4.6/5.0 and at follow-up: 5.4/6.0, (NS/NS). VAS pain (mm
of 100) was preop. at rest/activity 47/72 and at follow-up 22/36 (p<0.01).
Radiographic optimal position of the implant seen in 22 patients and dislocation
in two. Quick DASH improved from 49 preop. to 32 p<0.01) at latest follow-up.
PRWE changed from 63 preop. to 27 (p<0.01) at follow-up. Satisfaction (mm
of 100) was preoperatively 20 and at follow- up 63 (p<0.01). No infections
encountered but seven implants (25%) revised.
Conclusions:
Short-term results with this STPI pyrocarbon implant in the STT
joint are promising concerning pain, PROM, but revision rate was alarmingly high.
No conflicts of interest reported
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