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Accuracy of Conventional Triplane Measures Compared to 3-D Analysis for Assessment of Cubitus Varus Deformities in Adults

Authors
 Gil-Sung Yoon  ;  Won-Taek Oh  ;  Yong-Min Chun  ;  Il-Hyun Koh  ;  Ho-Jung Kang  ;  Yun-Rak Choi 
Citation
 THERAPEUTICS AND CLINICAL RISK MANAGEMENT, Vol.16 : 349-355, 2020-05 
Journal Title
 THERAPEUTICS AND CLINICAL RISK MANAGEMENT 
ISSN
 1176-6336 
Issue Date
2020-05
Keywords
computed tomography ; cubitus varus ; preoperative evaluation ; triplane measurement
Abstract
Purpose: Cubitus varus is a common triplane deformity in adults associated with supracondylar humeral fractures experienced as a child and consists of varus, extension, and internal rotation components. When corrective osteotomy is indicated, these three components should be measured precisely. This study aimed to evaluate the accuracy of radiographic and physical measurements of cubitus varus deformities in adults compared to values measured on three-dimensional (3-D) bone surface models of the adult bilateral humerus. Methods: Three-dimensional bilateral humerus models were developed using bilateral humerus CT images of 20 adult patients with cubitus varus. The varus, internal rotation, and extension components of the deformity were assessed by superimposing the 3-D bone model onto a mirror-image model of the contralateral normal humerus. Values obtained from the radiographic and physical measurements were compared with those from the 3D model. The reliability of each measurement was assessed by calculating correlation coefficients (CCs). Results: Radiographic measurements of the varus and extension components showed good reliability (CC = 0.796 and 0.791, respectively). Physical measurement of the varus component, however, showed only moderate reliability (CC= 0.539), while physical measurement of the extension and internal rotation components exhibited poor reliability (CC = 0.164 and 0.466, respectively). Conclusion: Varus and extension components of cubitus varus in adults can be reliably measured using conventional methods, whereas the internal rotation component cannot. Thus, 3-D methods with which to quantify the rotational component preoperatively might be needed when the correction of a rotational deformity is considered.
Files in This Item:
T202002014.pdf Download
DOI
10.2147/TCRM.S238142
Appears in Collections:
1. College of Medicine (의과대학) > Dept. of Orthopedic Surgery (정형외과학교실) > 1. Journal Papers
Yonsei Authors
Kang, Ho Jung(강호정) ORCID logo https://orcid.org/0000-0003-0273-1264
Koh, Il Hyun(고일현) ORCID logo https://orcid.org/0000-0001-9823-8516
Oh, Won Taek(오원택) ORCID logo https://orcid.org/0000-0003-1815-0851
Chun, Yong Min(천용민) ORCID logo https://orcid.org/0000-0002-8147-6136
Choi, Yun Rak(최윤락)
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/179202
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