Kuwashima Umito    Department   School of Medicine(Tokyo Women's Medical University Hospital), School of Medicine    Position   Assistant Professor
Article types	Original article
Language	English
Peer review	Peer reviewed
Title	Comparison of torsional changes in the tibia following a lateral closed or medial open wedge high tibial osteotomy.
Journal	Formal name：The Knee Abbreviation：Knee ISSN code：18735800/09680160
Domestic / Foregin	Foregin
Volume, Issue, Page	26(2),pp.374-381
Author and coauthor	Kuwashima Umito, Takeuchi Ryohei, Ishikawa Hiroyuki, Shioda Mikio, Nakashima Yasuharu, Schröter Steffen
Authorship	Lead author
Publication date	2019/03
Summary	OBJECTIVE:The aim of this study is to evaluate, by computed tomography (CT), whether different torsional changes occur in the tibia following a lateral closed wedge high tibial osteotomy (CWHTO) versus a medial open wedge high tibial osteotomy (OWHTO) procedure. It was hypothesized that the distal fragment of the tibia would show greater internal rotation after CWHTO.METHODS:Thirty knees from 25 patients who underwent HTO were enrolled. Fifteen knees of 14 patients who underwent CWHTO and 15 knees of 11 patients who received OWHTO were match-paired. CT scans were taken before and three weeks after surgery. Rotational changes in the distal fragment of the tibia were assessed by measuring the tibial torsion angle (TTA).RESULTS:The mean TTA in the CWHTO group pre-operatively and postoperatively was +23.9° ± 7.8° and + 18.2° ± 7.0°, respectively. Internal rotation of the distal fragment of the tibia after CWHTO was -5.7 ± 3.3° (P < 0.001). In the OWHTO group, the mean TTA pre-operatively and postoperatively was +27.9° ± 6.9° and + 26.8 ± 7.7°, respectively, with no significant change in torsion observed (P > 0.05).CONCLUSIONS:The distal fragment of the tibia rotated internally after CWHTO but not after OWHTO.LEVEL OF EVIDENCE:Level III: case-control study.
DOI	10.1016/j.knee.2019.01.009
PMID	30772185