title: Total knee arthroplasty in a patient with an ankylosing knee after previous patellectomy.
abstract: Patellectomized patients may have less satisfactory clinical outcomes following total knee arthroplasty (TKA) due to a decreased extensor mechanism efficiency and potential instability. Furthermore, the existing literature does not provide concrete guidance on the expected results of TKA or the type of implant that should be used in patellectomized patients. We present a case of a patient with an ankylosing knee who had undergone patellectomy due to gunshot injury 45 years ago and was treated with primary TKA using a posterior stabilized prosthesis at our institution. TKA using this prosthesis in the ankylosed knee with a previous history of patellectomy yielded good results in terms of postoperative clinical scores, range of motion and joint stability.
authors.affiliation: Department of Orthopaedic Surgery, Pusan National University School of Medicine, Busan, Korea.
authors.forename: Jeung Tak
authors.initials: JT
authors.lastname: Suh
authors.affiliation: Department of Orthopaedic Surgery, Pusan National University School of Medicine, Busan, Korea.
authors.forename: Seung Joon
authors.initials: SJ
authors.lastname: Rhee
authors.affiliation: Department of Orthopaedic Surgery, Pusan National University School of Medicine, Busan, Korea.
authors.forename: Shi Hwan
authors.initials: SH
authors.lastname: Park
authors.affiliation: Department of Orthopaedic Surgery, Pusan National University School of Medicine, Busan, Korea.
authors.forename: Sung Min
authors.initials: SM
authors.lastname: Hong
keywords: Ankylosis; Arthroplasty; Knee; Previous patellectomy