title: Tilt of the radius from forearm rotational axis reliably predicts rotational improvement after corrective osteotomy for malunited forearm fractures.
abstract: Forearm rotation occurs around an axis connecting the center of the radial head and the fovea of the distal ulna. The purpose of the present study was to demonstrate the usefulness of the difference between forearm and proximal radial axis in the treatment of malunited forearm fractures. We reviewed the results of eight corrective osteotomies for malunited fractures of the forearm without dislocations of the wrist or elbow. Subjects were 6 men and 2 women (mean age, 15 years; range, 10-21 years). Corrective osteotomy was performed at the fracture site. Preoperatively and at final follow-up, the are of forearm rotation was recorded and anteroposterior and lateral X-rays were taken. Proximal radius tilt was defined as the angle between the rotational axis of the forearm and the axis of the proximal radius. Corrective osteotomy improved proximal radius tilt in all cases. Three patients were considered to have malrotation. Postoperative rotational are correlated with proximal radial tilt (r = -0.83). No significant difference in rotational arc was evident between malunited cases and the remaining cases. To improve forearm rotation, corrective osteotomy should be planned to minimize proximal radius tilt.
authors.affiliation: Department of Hand Surgery, Nagoya University School of Medicine, 65 Tsurumaicho, Showaku, Nagoya 466-8550, Japan. tatebe@med.nagoya-u.ac.jp
authors.forename: Masahiro
authors.initials: M
authors.lastname: Tatebe
authors.forename: Takaaki
authors.initials: T
authors.lastname: Shinohara
authors.forename: Nobuyuki
authors.initials: N
authors.lastname: Okui
authors.forename: Michiro
authors.initials: M
authors.lastname: Yamamoto
authors.forename: Shigeru
authors.initials: S
authors.lastname: Kurimoto
authors.forename: Hitoshi
authors.initials: H
authors.lastname: Hirata
mesh_terms: D000293:Adolescent; D002648:Child; D005260:Female; D005592:Fracture Fixation / Q000379:methods*; D017102:Fracture Healing; D017759:Fractures, Malunited / Q000000981:diagnostic imaging / Q000503:physiopathology / Q000601:surgery*; D006801:Humans; D007564:Japan; D008297:Male; D010027:Osteotomy; D011237:Predictive Value of Tests; D011859:Radiography; D011885:Radius Fractures / Q000000981:diagnostic imaging / Q000503:physiopathology / Q000601:surgery*; D016059:Range of Motion, Articular; D020127:Recovery of Function; D012189:Retrospective Studies; D016896:Treatment Outcome; D014458:Ulna Fractures / Q000000981:diagnostic imaging / Q000503:physiopathology / Q000601:surgery*; D055815:Young Adult