Optimizing calibration of modern skeletal maturity systems.

Area of Science:

• Orthopedics
• Radiology
• Pediatric Growth Assessment

Background:

• The Greulich and Pyle system is widely used for skeletal maturity estimation but has limitations.
• Newer systems, like the modified Fels skeletal maturity system using knee radiographs, have been developed to address these drawbacks.
• Selecting an appropriate skeletal maturity standard is crucial for developing accurate systems.

Purpose of the Study:

• To compare the accuracy of a skeletal maturity system developed using the 90% of final height standard versus the peak height velocity standard.
• To evaluate the performance of these systems in predicting lower extremity length.

Main Methods:

• The modified Fels knee skeletal maturity system was recalibrated using two standards: 90% of final height and peak height velocity.
• The models were applied to 133 knee radiographs from 38 subjects.
• Skeletal age was estimated, and lower extremity length (femur and tibia) was predicted using the White-Menelaus method.

Main Results:

• The skeletal maturity system calibrated with the 90% of final height standard yielded significantly more accurate skeletal age estimates (p < 0.05).
• Both standards resulted in similar predictions for final femoral and tibial length (p > 0.05).

Conclusions:

• The 90% of final height standard provides a simpler and potentially more accurate approach for skeletal maturity system development.
• This standard may improve the precision of skeletal age estimation in pediatric populations.