title: Investigating the relationship between internal tibial torsion and medial collateral ligament injury in patients undergoing knee arthroscopy due to tears in the posterior one third of the medial meniscus.
abstract: OBJECTIVE
  To evaluate the relationship between medial collateral ligament (MCL) injury and degree of internal tibial torsion in patients who had undergone arthroscopic resection due to tears in the posterior one third of the medial meniscus.
  
  
  METHODS
  Seventy-one patients were allocated into two groups with respect to foot femur angle (FFA) and transmalleolar angle (TMA) (Group 1 31 patients with FFA<8° and Group 2 40 patients with FFA≥8°). The groups were compared in terms of valgus instability, Lysholm score, magnetic resonance view, FFA, and TMA, both before and after the operation.
  
  
  RESULTS
  Lysholm scores were higher in Group 2 at both postoperative week 1 (p<0.001) and month 1 (p=0.045) relative to Group 1. Preoperative cartilage injury was encountered more frequently in Group 1 (p=0.037) than in Group 2. MCL injury was detected more frequently in Group 1 compared to Group 2 postoperatively at week 1 (p=0.001).
  
  
  CONCLUSIONS
  We conclude that FFA and TFA, indicators of internal tibial torsion, may serve as markers for foreseeing clinical improvement and complications following arthroscopic surgery.
  
  
  METHODS
  level III retrospective comparative study.
authors.affiliation: Department of Orthopedics and Traumatology, Medipol University, Medical Faculty, Istanbul, Turkey. Electronic address: olcayguler77@gmail.com.
authors.forename: Olcay
authors.initials: O
authors.lastname: Guler
authors.affiliation: Department of Orthopedics and Traumatology, Medipol University, Medical Faculty, Istanbul, Turkey.
authors.forename: Mehmet
authors.initials: M
authors.lastname: Isyar
authors.affiliation: Department of Radiology, Nisa Hospital, Istanbul, Turkey.
authors.forename: Dilek
authors.initials: D
authors.lastname: Karataş
authors.affiliation: Department of Radiology, Medipol University, Medical Faculty, Istanbul, Turkey.
authors.forename: Tugrul
authors.initials: T
authors.lastname: Ormeci
authors.affiliation: Department of Orthopedics and Traumatology, Nisa Hospital, Istanbul, Turkey.
authors.forename: Halis
authors.initials: H
authors.lastname: Cerci
authors.affiliation: Department of Orthopedics and Traumatology, Medipol University, Medical Faculty, Istanbul, Turkey.
authors.forename: Mahir
authors.initials: M
authors.lastname: Mahirogulları
mesh_terms: D000328:Adult; D001182:Arthroscopy; D005260:Female; D006801:Humans; D007718:Knee Injuries / Q000175:diagnosis / Q000503:physiopathology* / Q000601:surgery; D035002:Lower Extremity / Q000033:anatomy & histology / Q000000981:diagnostic imaging; D008297:Male; D017888:Medial Collateral Ligament, Knee / Q000293:injuries / Q000503:physiopathology*; D008875:Middle Aged; D012189:Retrospective Studies; D013977:Tibia / Q000293:injuries* / Q000503:physiopathology; D000070600:Tibial Meniscus Injuries / Q000175:diagnosis / Q000503:physiopathology* / Q000601:surgery; D054159:Torsion, Mechanical; D055815:Young Adult
keywords: Foot femoral angle; Injury; Internal tibial torsion; Knee arthroscopy; Medial collateral ligament; Medial meniscus; Transmalleolar angle