title: The high tibial osteotomy, open versus closed wedge, a comparison of methods in 108 patients.
abstract: BACKGROUND
  One hundred and eight patients with varus gonarthrosis were treated with high tibial osteotomy (HTO) in 2001. Fifty one patients received an open wedge osteotomy by using the 'Puddu' plate and 57 patients received a Coventry-type closing wedge osteotomy. For both groups the follow-up examination period was 22.5 months (253-1009 days).
  
  
  METHODS
  To evaluate the study, radiological and subjective criteria as well as the Lysholm and the Tegner Activity Score were used. Altogether 84 % of the patients were included in the follow-up examination study.
  
  
  RESULTS
  In both groups a significant improvement of both scores were achieved. Both methods obtained safe and reproducible results for the correction considering the different operation techniques. There were no differences in outcome between the two methods. Satisfactory results were also achieved for early arthrosis of the femoropatellar and the lateral compartment.
  
  
  CONCLUSIONS
  Open and closed wedge HTOs obtain significant improvement in patients with medial osteoarthritis of the knee. Using the right technique is very important for good results. For stabilization of the medial ligament we recommend the open wedge osteotomy. The patient should be informed about the routine removal of the metal plate.
authors.affiliation: Department of Operative Orthopaedics and Sportstraumatology, Hospital for Sports Injuries Hellersen, Paulmannshoherstr.17, 58515 Luedenscheid, Germany. st.hoell@web.de
authors.forename: S
authors.initials: S
authors.lastname: Hoell
authors.forename: J
authors.initials: J
authors.lastname: Suttmoeller
authors.forename: V
authors.initials: V
authors.lastname: Stoll
authors.forename: S
authors.initials: S
authors.lastname: Fuchs
authors.forename: G
authors.initials: G
authors.lastname: Gosheger
mesh_terms: D000328:Adult; D001860:Bone Plates; D006801:Humans; D007593:Joint Instability / Q000601:surgery; D008875:Middle Aged; D020370:Osteoarthritis, Knee / Q000601:surgery*; D010027:Osteotomy / Q000379:methods*; D013977:Tibia / Q000601:surgery*