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Arch Hand Microsurg > Volume 22(1); 2017 > Article
Journal of the Korean Society for Surgery of the Hand 2017;22(1):13-19.
Published online March 31, 2017.
DOI: https://doi.org/10.12790/jkssh.2017.22.1.13   
The Factors Predicting Secondary Displacement after Closed Reduction of Unstable Distal Radius Fracture
Jung Suk Lee, Jae Hoon Lee, Young Joon Kim, Jong Hun Back, Wook Jae Song, Jin Sung Park, Duke Whan Chung, Chung Soo Han
1Department of Orthopaedic Surgery, Kyung Hee University Hospital at Gangdong, Seoul, Korea. ljhos69@naver.com
2Department of Orthopaedic Surgery, Inje University Busan Paik Hospital, Busan, Korea.
3Department of Orthopaedic Surgery, Kyung Hee University Medical Center, Seoul, Korea.
4Department of Orthopaedic Surgery, Gyeongsang National University Hospital, Jinju, Korea.
Received: 12 November 2016   • Revised: 2 February 2017   • Accepted: 12 February 2017
It has been studied prognostic factors about secondary displacement after conservative treatment of the distal radius fracture, but each study showed different results. Authors retrospectively evaluated factors known to be involved secondary displacement of the distal radius fracture to determine its significance.

One hundred eighteen cases of the radiographically unstable distal radius fractures that closed reduction was adequately performed were retrospectively studied and the radiographic images were taken at 1, 2, 3, 4, 6 weeks after closed reduction. During follow-up, dorsal tilt more than 15°, volar tilt more than 20°, ulnar positive variance more than 4 mm, radial length less than 6 mm, radial inclination less than 10° were thought of the loss of reduction.

In 41 cases (34.7%), the loss of reduction occurred. Sex, intra-articular fracture, dorsal and volar comminution, concomitant ulnar fracture and involvement of the distal radio-ulnar joint were statistically not significant. Analysis results of the binomial logistic regression model were as follows: age (p=0.003), radial shortening (p=0.010) and ulnar positive variance (p=0.010) were statistically significant as the predictive prognostic factors. Analysis results of the multinomial logistic regression model showed age (p=0.006) as an only statistically significant factor.

As the predictive prognostic factors for development of secondary displacement after conservative treatment of the unstable distal radius fracture, age was determined as most significant factor. Also radial shortening and ulnar positive variance were thought of the predictive factors for secondary displacement.

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