title: Patellar instability following total knee replacement -- the dangers of constant design evolution.
abstract: Patellar instability following total knee replacement although infrequent can cause disabling symptoms. We report a case of symptomatic patellar instability caused by insertion of left femoral component into a right knee. We highlight that all members of the surgical and theatre team need to be familiar both with the implant equipment and of any recent design modifications, particularly if they have been used to using one system for a long time, in order to prevent surgical errors. In addition this possibility should be born in mind by surgeons looking for causes of post-operative patellar instability.
authors.affiliation: Department of Orthopaedics, Manchester Royal Infirmary, Oxford Road, Manchester M13 9WL, UK.
authors.forename: T M
authors.initials: TM
authors.lastname: Clough
authors.forename: A
authors.initials: A
authors.lastname: Goel
authors.forename: P
authors.initials: P
authors.lastname: Hirst
mesh_terms: D000368:Aged; D019645:Arthroplasty, Replacement, Knee / Q000009:adverse effects*; D005260:Female; D006801:Humans; D007593:Joint Instability / Q000209:etiology* / Q000503:physiopathology* / Q000601:surgery; D019300:Medical Errors / Q000009:adverse effects*; D010329:Patella / Q000503:physiopathology* / Q000601:surgery; D011474:Prosthesis Design / Q000009:adverse effects*