Related Experiment Video
Updated: Jun 12, 2026
09:31
Individualized Stem-positioning in Calcar-guided Short-stem Total Hip Arthroplasty
Published on: February 27, 2018
Change in effective leg length after angular deformity correction by hemiepiphyseal stapling
Ho-Joong Jung1, Tae-Joon Cho, In Ho Choi
1Department of Orthopaedic Surgery, Chung-Ang University College of Medicine, Seoul, Korea.
Clinics in Orthopedic Surgery
|June 2, 2010
Summary
Hemiepiphyseal stapling impacts leg length based on limb length, physeal width, and angular correction amount. The L/d ratio guides predictions for effective leg length changes in pediatric angular deformity correction.
Area of Science:
- Orthopedic surgery
- Pediatric orthopedics
- Limb length discrepancy
Background:
- Hemiepiphyseal stapling can influence effective leg length positively or negatively.
- Understanding these effects is crucial for managing angular deformities in growing children.
Purpose of the Study:
- To analyze changes in effective leg length following hemiepiphyseal stapling for angular correction.
- To validate a mathematical model for predicting these length changes in clinical settings.
Main Methods:
- A mathematical model of hemiepiphyseal stapling was developed.
- The model's formula was validated using 6 clinical cases.
- Key anatomical parameters (L, d, theta) were measured in 21 additional cases.
Main Results:
- Effective leg length changes depend on distal limb length (L), physeal width (d), and angular correction (theta).
- The model accurately predicted the direction of leg length change in validated cases.
- The limb length to physeal width (L/d) ratio was found to be 4.82 +/- 0.51.
Conclusions:
- Hemiepiphyseal stapling may decrease leg length with <10 degrees correction and increase it with >16 degrees correction, given the observed L/d ratio.
- This predictive model aids in selecting appropriate surgical techniques for angular deformities in skeletally immature patients.
Related Concept Videos
01:18Indeterminate Structure
Indeterminate structures refer to structures where internal forces and reactions cannot be determined using only the equations of static equilibrium. Indeterminate structures have more unknown forces and reaction forces than equations of static equilibrium that can be used to determine them. Indeterminate structures are often used in engineering to create complex, efficient, and aesthetically pleasing structures. There are various types of indeterminate structures used in engineering and some...
01:09Changes in the Appendicular Skeleton with Age
The upper and lower limb initially develops as a small bulge called a limb bud, which appears on the lateral side of the early embryo. The upper limb bud appears near the end of the fourth week of development, with the lower limb bud appearing shortly after.
Initially, the limb buds consist of a core of mesenchyme covered by a layer of ectoderm. The ectoderm at the end of the limb bud thickens to form a narrow crest called the apical ectodermal ridge. This ridge stimulates the underlying...
Initially, the limb buds consist of a core of mesenchyme covered by a layer of ectoderm. The ectoderm at the end of the limb bud thickens to form a narrow crest called the apical ectodermal ridge. This ridge stimulates the underlying...