We retrospectively reviewed the charts of 66 patients
Of these 66 patients, 16 (24%) had an extension
contracture of the knee develop (Table 1). These patients
were not able to bend their knee greater than 60 despite
aggressive physical therapy.
Extension contracture of the knee is a common complication of femoral lengthening. Knee flexion exercises to stretch the contracture with physical therapy can be effective but take a prolonged amount of time to work and place increased stress across the patellofemoral joint. We developed a minimal-incision limited quadricepsplasty surgical technique to treat knee extension contracture secondary to femoral lengthening and retrospectively reviewed 16 patients treated with this procedure.
Range of motion of the knee and quadriceps strength were recorded preoperatively, after femur lengthening but before additional surgery, after quadricepsplasty, and at each followup. The mean femoral lengthening performed was 4.4 cm. We compared range of motion and time to regain knee flexion with those of historical controls. The minimum follow up after quadricepsplasty was 6 months (mean, 38 months; range, 6–84 months). The mean range of motion was 129 preoperatively, 29 after the distraction phase of femoral lengthening, and 108 after limited quadricepsplasty, and at final followup, the mean knee flexion was 125. There were no major complications. Limited quadricepsplasty improved knee flexion after a knee extension contracture developed secondary to femoral lengthening. In comparison to historical controls who did not have quadricepsplasty, the patients with limited quadricepsplasty had quicker return of knee flexion, although there was no difference in knee flexion achieved ultimately.
http://www.limblengthening.com/LimitedQuad.pdfso range of motion comes back even if you don't do a quadroplasty. it takes longer to reach full ROM though.
this was in cages also so monorail would have less scar tissue I imagine.
this scar tissue and subsequent range of motion issue seems to be the only draw back to external femur long term damage.
with the new lon monorail technique I imagine even less scar tissue. and a much greater chance of recovery.
I guess my point is why is everyone so scared of doing external femur?Huh?Huh?? obviously there is a higher chance to develop knee contractures and limited ROM however all my study shows that is due to scar tissue and increased for a larger cage frame and is also increased for a longer duration of external frames.