Navigation versus Radiographic Measurements in the Open-Wedge High Tibial Osteotomy using Computer Assisted Surgery (CAS).
10.4055/jkoa.2008.43.3.301
- Author:
Dae Kyung BAE
1
;
Kyung Ho YOON
;
Sang Jun SONG
;
Myeung Cheol SHIN
;
Jung Ho NOH
Author Information
1. Department of Orthopedic Surgery, School of Medicine, Kyung Hee University, Seoul, Korea. bdkyung@khmc.or.kr
- Publication Type:Original Article
- Keywords:
Knee;
Osteoarthritis;
Open wedge high tibial osteotomy;
Navigation system
- MeSH:
Axis, Cervical Vertebra;
Knee;
Osteoarthritis;
Osteotomy;
Surgery, Computer-Assisted
- From:The Journal of the Korean Orthopaedic Association
2008;43(3):301-307
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
PURPOSE: To compare the measurements using a navigation system and radiographic measurement in an open wedge high tibial osteotomy under navigation control. MATERIALS AND METHODS: From July, 2005 to January, 2007, 32 open wedge high tibial osteotomies were performed using a navigation system for osteoarthritis of the knee. The postoperative mechanical axis % (MA%), which is planned on the navigation system, were 62%. The mechanical axis (MA) and MA% were measured on the navigation system. The preoperative and postoperative MA and MA% were measured on the radiographs. The angles measured with the navigation system and radiographs were compared. RESULTS: On the navigation system, the mean MA before osteotomy was varus 8.8degrees. The mean MA and MA% after fixation were valgus 2.9degrees and 57.7%. On the radiographs, the mean MA was varus 9.7degrees preoperatively and valgus 4.0degrees postoperatively. The mean MA% was 10.2% preoperatively and valgus 64.4% postoperatively. There were positive correlations between the values measured with the navigation system and the radiographs (r>0.5, p<0.001). CONCLUSION: There were significant correlations between the values measured with the navigation system and radiographs in an open wedge high tibial osteotomy using a navigation system. The correction angle from the navigation system is reliable, predictable and controllable during surgery.
