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Normal ranges of ulnar and radial deviation with reference to ulnar variance
The Journal of International Medical Research
|June 4, 2004
Summary
Wrist deviation ranges differ based on ulnar variance. Ulnar deviation is greater in ulna minus wrists, while radial deviation is greater in ulna minus/plus wrists. Ulnar variance should be noted with wrist deviation measurements.
Area of Science:
- Orthopedics
- Biomechanics
- Anatomy
Background:
- Ulnar variance, the relative length of the ulna and radius at the wrist, can influence wrist biomechanics.
- Understanding normal ranges of wrist motion in relation to ulnar variance is crucial for diagnosing and managing wrist conditions.
Purpose of the Study:
- To determine the normal ranges of radial and ulnar deviation of the wrist.
- To investigate the relationship between these ranges of motion and different types of ulnar variance.
Main Methods:
- 102 healthy subjects (204 wrists) were analyzed.
- Wrist radial and ulnar deviation were measured using a universal goniometer.
- Ulnar variance was assessed manually or radiographically and categorized (ulna minus, ulna plus, ulna minus/plus).
Main Results:
- Ulnar deviation was significantly greater in subjects with ulna minus variance.
- Radial deviation was significantly greater in subjects with ulna minus/plus variance.
- No significant difference was found in the total range of radio-ulnar deviation between groups.
Conclusions:
- Ulnar variance influences the specific ranges of radial and ulnar deviation.
- It is recommended to record ulnar variance alongside measurements of radial and ulnar deviation for a comprehensive assessment.
- These findings contribute to a better understanding of normal wrist biomechanics.
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