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Conservative treatment is indicated for partial quadriceps tears. Immobilize the knee in full extension for 3-6 weeks. Straight-leg raises are started late in the immobilization phase. If these can be performed without discomfort for 10 days, immobilization can be progressively discontinued. Range-of-motion exercises are then initiated and quadriceps strengthening is continued until the strength of the injured leg is equal to that of the contralateral leg.
Early surgical repair yields the best results for complete quadriceps tendon ruptures
Early operative repair is indicated for all acute, complete quadriceps tendon ruptures, provided that the patient is a suitable surgical candidate. Surgery is also indicated for most chronic, complete quadriceps ruptures. Although repair, is technically more difficult and results are inferior to those of early repair, successful results have been reported with surgery performed even as late as a year following injury. Partial tears may be treated nonoperatively unless they are refractory to a long course of conservative management.
Refer ://www.emedicine.com/orthoped/TOPIC274.HTM
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