Ultrasonographic measurement of the dimensions of proximal and distal patellar fragments after Niebauer-King Procedure for the management of congenital dislocation of the knee

Objective The aim of this study was to ultrasonographically measure the dimensions proximal and distalpatellar fragments determine whether postoperative growth differences existbetween in children with congenital dislocation kneetreated by Niebauer Kings quadricepsplasty. Methods This retrospective included six congenitaldislocated knees four arthrogryposis multiplex congenita (AMC)(3 girls; mean age = 40 months; range 9-44 months), presented severe hyperextension knee contractures,which were treated Niebauer-King's quadricepsplasty.The transverse, craniocaudal, anteroposterior patellaewere measured 20 (range 6-42) months postoperatively a singleradiologist. Results anteroposteriordimensions distal halves patellae were: 11.46 (7.0-16.9)-10.5 (8.0-14.4); 17.4 (14.0-21.0) -16.68 (14.5-19.3); 6.76 (5.6-7.9) -7.76 (7.0-9.4) mm respectively. There no significantdifference craniocaudal transverse dimensions, but anteroposteriordimension (thickness) articulating joint had agreater thickness (P 0,01). Conclusion Evidence from has shown that bettergrowth can be expected fragment patella compared theproximal following treatment quadricepsplasty ofthe knee. Level evidence IV, Therapeutic Study.