title: Clinical Evaluation of the Root Tear of the Posterior Horn of the Medial Meniscus in Total Knee Arthroplasty for Osteoarthritis.
abstract: OBJECTIVE
  To investigate the incidence of root tears of the posterior horn of the medial meniscus in total knee replacement arthroplasty for knee osteoarthritis and retrospectively analyze clinical results and factors associated with root tears.
  
  
  METHODS
  There were 197 knees of 140 enrolled patients who had undergone total knee replacement arthroplasty between September 2010 and May 2014. The presence of a root tear of the posterior horn of the medial meniscus was confirmed in all patients. Statistical analysis was performed to investigate the correlation between root tears and the possible factors of meniscal tears including gender, age, severity of symptoms (visual analogue scale [VAS] score and medial joint line tenderness), grade of osteoarthritis (Kellgren-Lawrence grading scale), body mass index (BMI), varus deformity, and mechanical axis deviation.
  
  
  RESULTS
  Meniscal tears were observed in 154 knees (78.17%). The root tear had correlation with the severity of osteoarthritis (p<0.05), varus deformity (p<0.05), mechanical axis deviation (p<0.05), and BMI (p<0.05).
  
  
  CONCLUSIONS
  Factors considered to represent the severity of osteoarthritis were found to be associated with root tears of the medial meniscus posterior horn. Increased BMI seemed to be associated with the increased incidence of root tears of the medial meniscus posterior horn.
authors.affiliation: Department of Orthopaedic Surgery, Chungbuk National University Hospital, Cheongju, Korea.
authors.forename: Eui-Sung
authors.initials: ES
authors.lastname: Choi
authors.affiliation: Department of Orthopaedic Surgery, Chungbuk National University Hospital, Cheongju, Korea.
authors.forename: Sang-Jun
authors.initials: SJ
authors.lastname: Park
keywords: Arthroplasty; Degenerative arthritis; Knee; Medial meniscus; Root tear