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Reconstructed patellar tendon length after proximal tibia prosthetic replacement
SHIMOSE S; SUGITA T; KUBO T; MATSUO T; OCHI M
CLIN ORTHOP RELAT RES , 2005, n° 439, p. 176-180 Doc n°: 122364 Localisation : Documentation IRR Descripteurs : DE66 - TRAITEMENTS - TIBIA-PERONE A common problem after proximal tibia prosthetic reconstruction is insufficient extensor mechanism or extensor lag. Maintaining the reconstructed patellar tendon length is an important way to minimize extensor lag. We measured the patellar tendon length and extensor lag serially. From 19942003, seven consecutive patients with malignant bone tumors of the proximal tibia had prosthetic reconstruction. The extensor mechanism was reconstructed by reattachment of the patellar tendon to the prosthesis with a synthetic material and augmented by a gastrocnemius flap. The patellar tendon length was measured according to the Insall-Salvati ratio. The ratios at 30 degrees knee flexion decreased immediately postoperatively, and reverted to almost the same preoperative values within 18 months. The mean ratios at 60 degrees knee flexion are significantly greater than 30 degrees at 6 months postoperatively. These findings indicate that the patellar tendon stretched, whereas the extensor lag improved continuously for 12 months postoperatively. Langue : ANGLAIS |
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