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Lower-extremity rotational problems in children. Normal values to guide management
Insights
This study establishes normal rotational profile values for lower extremities in children and adults. Most rotational variations, like out-toeing or tibial torsion, are normal developmental variations requiring no treatment.
Area of Science:
- Orthopedics
- Pediatric Orthopedics
- Developmental Biology
Background:
- Fetal positioning influences lower limb development, causing lateral femoral and medial tibial rotation.
- These intrauterine molding effects typically resolve during infancy.
- Genetically determined variations in limb rotation become apparent after infancy.
Purpose of the Study:
- To establish normative data for the rotational profile of the lower extremities in children and adults.
- To provide reference values for clinical evaluation of rotational variations.
- To differentiate normal developmental variations from clinically significant rotational problems.
Main Methods:
- Analysis of lower extremity rotational profiles in 1,000 normal subjects.
- Inclusion of both pediatric and adult populations.
- Establishment of normal ranges for femoral and tibial rotation.
Main Results:
- Normal values for the rotational profile of the lower extremities were established.
- Out-toeing in infants, medial tibial torsion in toddlers, and medial femoral torsion in young children represent extremes of a normal developmental pattern.
- The vast majority of these rotational variations fall within the normal range and do not necessitate treatment.
Conclusions:
- The study provides essential normative data for assessing lower limb rotational profiles.
- Clinicians should compare patient findings to these established normal values.
- Most common rotational variations in children are benign developmental variations and do not require intervention.
Abstract:
We studied 1,000 normal lower extremities of children and adults in order to establish normal values for the rotational profile. The intrauterine position of the fetus molds the femur by rotating it laterally and molds the tibia by rotating it medially. These molding effects usually resolve spontaneously during infancy, and then genetically determined individual differences are unmasked. Rotational problems should be clinically evaluated and the findings compared with the normal values provided by this study. Out-toeing in infants, medial tibial torsion in toddlers, and medial femoral torsion in young children are extremes of a normal developmental pattern. In the vast majority, these rotational variations fall within the broad range of normal and require no treatment.