A Simple and Practical Method to Determine Amount of Rotation in Femoral Midshaft Derotational Osteotomy: Geometric Arc and Chord Formulas

Samir İlgaroğlu; Abdul Veli Ismailoglu; Ziya Shammadli

Makale detayları

A Simple and Practical Method to Determine Amount of Rotation in Femoral Midshaft Derotational Osteotomy: Geometric Arc and Chord Formulas

Yazarlar:

Samir İlgaroğlu | Abdul Veli Ismailoglu | Ziya Shammadli

Yayıncı:

Marmara University

Ana Başlıklar:

Orthopaedics

Dergi:

Clinical and Experimental Health Sciences Vol.15 Issue 2, pp.302-307

Belge Tipi:

Makale

Yayın Tarihi:

6/2025

Belge Dili:

İngilizce

Document ID (Org No.):

2001352321

pISSN:

2459-1459

Anahtar kelimeler:

Özet:

 Objective: Femoral derotational osteotomy is a surgical intervention that involves the derotation of the femur at certain sites to achieve the desired femoral anteversion angle. However, current intraoperative techniques measuring the degree of correction and adequately performing it is still insufficient to achieve the desired femoral anteversion angle. The aim of this study is to investigate whether the geometric arc and chord formulas are applicable to achieve the target femoral anteversion angle in mid-shaft femoral derotational osteotomy. Methods: CT images of 20 femurs with excessive anteversion or retroversion deformities were retrospectively selected, and three-dimensional 3D geometric models were obtained. 15⁰ of femoral anteversion were chosen as the target angle. Geometric arc and chord formulas were separately applied on axial CT images at the mid-point of the femurs to calculate the degree of correction. Then, virtual mid-shaft femoral derotational osteotomy was performed, then post-op femoral anteversion angle was measured. Results: There was no statistical difference between the postoperative measured anteversion angles and the targeted angle in all examples. The arc and the chord lengths were not statistically different which indicates both formulas can be used to estimate the degree of correction. Conclusion: The arc and chord formulas provided an accurate target femoral anteversion angle. Using one of these formulas preoperatively can facilitate to achieve desired femoral anteversion angle without having the intraoperative measurements nor using any special equipment.

 Objective: Femoral derotational osteotomy is a surgical intervention that involves the derotation of the femur at certain sites to achieve the desired femoral anteversion angle. However, current intraoperative techniques measuring the degree of correction and adequately performing it is still insufficient to achieve the desired femoral anteversion angle. The aim of this study is to investigate whether the geometric arc and chord formulas are applicable to achieve the target femoral anteversion angle in mid-shaft femoral derotational osteotomy. Methods: CT images of 20 femurs with excessive anteversion or retroversion deformities were retrospectively selected, and three-dimensional 3D geometric models were obtained. 15⁰ of femoral anteversion were chosen as the target angle. Geometric arc and chord formulas were separately applied on axial CT images at the mid-point of the femurs to calculate the degree of correction. Then, virtual mid-shaft femoral derotational osteotomy was performed, then post-op femoral anteversion angle was measured. Results: There was no statistical difference between the postoperative measured anteversion angles and the targeted angle in all examples. The arc and the chord lengths were not statistically different which indicates both formulas can be used to estimate the degree of correction. Conclusion: The arc and chord formulas provided an accurate target femoral anteversion angle. Using one of these formulas preoperatively can facilitate to achieve desired femoral anteversion angle without having the intraoperative measurements nor using any special equipment.

 Objective: Femoral derotational osteotomy is a surgical intervention that involves the derotation of the femur at certain sites to achieve the desired femoral anteversion angle. However, current intraoperative techniques measuring the degree of correction and adequately performing it is still insufficient to achieve the desired femoral anteversion angle. The aim of this study is to investigate whether the geometric arc and chord formulas are applicable to achieve the target femoral anteversion angle in mid-shaft femoral derotational osteotomy. Methods: CT images of 20 femurs with excessive anteversion or retroversion deformities were retrospectively selected, and three-dimensional 3D geometric models were obtained. 15⁰ of femoral anteversion were chosen as the target angle. Geometric arc and chord formulas were separately applied on axial CT images at the mid-point of the femurs to calculate the degree of correction. Then, virtual mid-shaft femoral derotational osteotomy was performed, then post-op femoral anteversion angle was measured. Results: There was no statistical difference between the postoperative measured anteversion angles and the targeted angle in all examples. The arc and the chord lengths were not statistically different which indicates both formulas can be used to estimate the degree of correction. Conclusion: The arc and chord formulas provided an accurate target femoral anteversion angle. Using one of these formulas preoperatively can facilitate to achieve desired femoral anteversion angle without having the intraoperative measurements nor using any special equipment.

 Objective: Femoral derotational osteotomy is a surgical intervention that involves the derotation of the femur at certain sites to achieve the desired femoral anteversion angle. However, current intraoperative techniques measuring the degree of correction and adequately performing it is still insufficient to achieve the desired femoral anteversion angle. The aim of this study is to investigate whether the geometric arc and chord formulas are applicable to achieve the target femoral anteversion angle in mid-shaft femoral derotational osteotomy. Methods: CT images of 20 femurs with excessive anteversion or retroversion deformities were retrospectively selected, and three-dimensional 3D geometric models were obtained. 15⁰ of femoral anteversion were chosen as the target angle. Geometric arc and chord formulas were separately applied on axial CT images at the mid-point of the femurs to calculate the degree of correction. Then, virtual mid-shaft femoral derotational osteotomy was performed, then post-op femoral anteversion angle was measured. Results: There was no statistical difference between the postoperative measured anteversion angles and the targeted angle in all examples. The arc and the chord lengths were not statistically different which indicates both formulas can be used to estimate the degree of correction. Conclusion: The arc and chord formulas provided an accurate target femoral anteversion angle. Using one of these formulas preoperatively can facilitate to achieve desired femoral anteversion angle without having the intraoperative measurements nor using any special equipment.

Makale detayları

A Simple and Practical Method to Determine Amount of Rotation in Femoral Midshaft Derotational Osteotomy: Geometric Arc and Chord Formulas

Yazarlar:

Samir İlgaroğlu | Abdul Veli Ismailoglu | Ziya Shammadli

Yayıncı:

Marmara University

Ana Başlıklar:

Orthopaedics

Dergi:

Clinical and Experimental Health Sciences Vol.15 Issue 2, pp.302-307

Belge Tipi:

Makale

Yayın Tarihi:

6/2025

Belge Dili:

İngilizce

Document ID (Org No.):

2001352321

pISSN:

2459-1459

derotational osteotomy

femoral anteversion

geometric arc formula

femoral midshaft osteotomy.

Sayı

Makale detayları

A Simple and Practical Method to Determine Amount of Rotation in Femoral Midshaft Derotational Osteotomy: Geometric Arc and Chord Formulas

Yazarlar: Samir İlgaroğlu | Abdul Veli Ismailoglu | Ziya Shammadli

Yayıncı: Marmara University

Ana Başlıklar: Orthopaedics

Dergi: Clinical and Experimental Health Sciences Vol.15 Issue 2, pp.302-307

Belge Tipi: Makale

Yayın Tarihi: 6/2025

Belge Dili: İngilizce

Document ID (Org No.): 2001352321

pISSN: 2459-1459

derotational osteotomy

femoral anteversion

geometric arc formula

femoral midshaft osteotomy.

Sayı

Yazarlar:

Samir İlgaroğlu | Abdul Veli Ismailoglu | Ziya Shammadli

Yayıncı:

Marmara University

Ana Başlıklar:

Orthopaedics

Dergi:

Clinical and Experimental Health Sciences Vol.15 Issue 2, pp.302-307

Belge Tipi:

Makale

Yayın Tarihi:

6/2025

Belge Dili:

İngilizce

Document ID (Org No.):

2001352321

pISSN:

2459-1459