J Korean Fract Soc.  1999 Jul;12(3):660-666.

Assessments of Reduction for Supracondylar Humerus fractures in Children: Comparison of Clinical carrying angle, Baumanns angle and Metaphyseal-diaphyseal angle

• Park SR
• Kim HS
• Kang JS
• Lee WH
• Kim SH

Abstract

PURPOSE: The object of this retrospective study is to verify Baumanns angle as assessment methods of reduction for supracondylar fracture of the humerus in children and to confirm what is the more accurate assessment methods of supracondylar fracture of the humerus between Baumanns and metaphyseal-diaplyseal angle.
MATERIALS AND METHODS
34 cases of more than 1 years follow up after closed reduction and pinning were reviewed. Simple linear regression has been used for statistical analysis and Pearsons correlation coefficient(rho) has been used for comparison of Baumanns angle and metaphy seal-diaphyseat angle.
RESULTS
The results form simple linear regression, about a 10 change in Baumanns angle contributes to a change in the carrying angle of approximately 3.7 on the uninjured(=-0.372, r=-0.750, P<0.001) and injured( =-0.365, r=-0.759, P<0.001) arms. In comparison of Baumanns angle and metaphyseal-diaphyseal angle to predict final carrying angle, the correlation coefficient between Baumanns angle and carrying angle(r=-0.759) was higher than that between metaphyseal-diaphyseal angle and carying angle(r=-0.495) with statistical significant using Fishers rho(P<0.05).
CONCLUSION
The Baumannss angle after reduction can be reliably used to predict accurately the final carrying angle and is more accurate than the metaphyseal-diaphyseal angle to predict the final carrying angle.

Keyword

Humerus; Supracondylar Fracture; Baumanns angle; Metaphyseal-diaphyseal angle; Carrying angle

MeSH Terms

Arm
Child*
Follow-Up Studies
Humans
Humerus*
Linear Models
Retrospective Studies