title: Study of the Clinical Outcome between Traumatic and Degenerative (non-traumatic) Meniscal Tears after Arthroscopic Surgery: A 4-Years Follow-up Study.
abstract: BACKGROUND
  The meniscus is a biconcave fibrocartilage in the knee joint interpose between the femoral condyles and tibial plateau; the meniscus has functions in load bearing, load transmission, shock absorption joint stability, joint lubrication, and joint congruity.
  
  
  OBJECTIVE
  The aim of this study is to provide orthopeadic surgeon a base of reference in the choice of the optimal course of management for meniscal tears.
  
  
  METHODS
  One hundred and seventeen patients met the criteria of inclusion for the present study. Patients were divided in two groups T and NT according to the presence of distinct previous traumatic events to the knees. Two subgroups were formed in each groups T and NT respectively at a mean follow up of 1 and 4 years. Postoperative clinical outcome were assessed using Lysholm scores and Rand SF-36 survey.
  
  
  RESULTS
  One hundred and seventeen patients were included in the present study with 60(51.28%) patients in the traumatic group and 57(48.71%) in the degenerative group. 95(81.19%) patients in total were satisfied with their health status at end of follow up. The mean value of Lysholm scores at 1 year were respectively 85.25±8.78 for traumatic group and 86.38±12.14 for non-traumatic group and at 4 years were respectively 92.63±7.31 for traumatic group and 72.90±20.77 for non-traumatic group. According to Rand SF-36 health, traumatic group showed better improvements compare to non-traumatic group between 1 and 4 years after arthroscopic meniscus surgery.
  
  
  CONCLUSIONS
  A total of 95(81.19%) patients in total were satisfied with their health status at follow up, however, we found that arthroscopy as a treatment for meniscal tear have a relatively better mid-term clinical outcome for traumatic meniscal tears compare to non-traumatic/degenerative meniscal tears.
authors.affiliation: Master of Surgery, Physician Assistant, American Medical Center (AMC) , 888 Tianlin Road, Shanghai, Minghang District, P.R. China .
authors.forename: Nietiayurk Aminake
authors.initials: NA
authors.lastname: Ghislain
authors.affiliation: Medical Doctor, Attendin Physician, Orthopaedic Surgery, Zhongda Hospital , Medical College, Southeast University, 87 Ding Jia Qiao, Nanjing, Jiangsu-210009, P. R. China .
authors.forename: Ji-Nan
authors.initials: JN
authors.lastname: Wei
authors.affiliation: Medical Doctor, Chief Physician, Department of Orthopaedic Surgery, Zhongda Hospital , Southeast University, 87 Ding Jia Qiao, Nanjing, Jiangsu-210009, P. R. China .
authors.forename: Yong-Gang
authors.initials: YG
authors.lastname: Li
keywords: Meniscus; Optimal; Orthopedic surgeon; Trauma