title: Open wedge high tibial osteotomy: cause of patellar descent.
abstract: This was a retrospective review of the nine open wedge high tibial osteotomy (HTO) done in a regional hospital in Hong Kong from 2006 to 2008. The mechanical hip-knee-ankle angle improved from average 169.5°(164°-175°) to average 183.9° (179°-187°). Patellar descent was noted in all patients postoperatively, with Blackburne-Peel (BP) index significantly changing from 0.78 (0.64-0.93) to 0.59 (0.38-0.78) (p < 0.05). This change was strongly correlated with the size of anterior bone graft (r = -0.766; p = 0.016). The patellar tendon length as measured by Insall-Salvati index was not changed (pre-operative: 1.02 (0.88-1.25), final: 1.09 (0.8-1.22) (p = 0.683)), inferring that scarring contracture of patellar tendon was not related to patellar descent.
authors.affiliation: Department of Orthopaedics & Traumatology, Alice Ho Miu Ling Nethersole Hospital, Hong Kong SAR, People's Republic of China. fchjason@netvigator.com
authors.forename: Jason C H
authors.initials: JC
authors.lastname: Fan
mesh_terms: D000328:Adult; D016025:Bone Transplantation / Q000009:adverse effects / Q000379:methods; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D020370:Osteoarthritis, Knee / Q000601:surgery; D010027:Osteotomy / Q000009:adverse effects* / Q000379:methods; D010329:Patella / Q000473:pathology*; D017847:Patellar Ligament / Q000473:pathology*; D012189:Retrospective Studies; D013977:Tibia / Q000601:surgery*