The morphology of the femur in elderly Japanese females: Analysis using 3D-CT

Takashi Maehara, Masahiro Kiyono, Tomoyuki Noda, Ryozo Sato, Hiroaki Kadota, Tadahiro Hori, Yoichi Koga, Yoshihisa Hidaka, Ryoji Joko, Sosuke Muraoka, Toshihumi Ozaki

Research output: Contribution to journalArticle

Abstract

Background: While various implants are currently used for the treatment of femoral trochanteric fractures in Japan, ‘mismatches’ have been known to occur between patient and implant type. The purpose of this study is to identify morphological characteristics of elderly Japanese females, both in terms of the shape of proximal femur and its anterior curvature in order to evaluate the suitability of implants for treatment of femoral trochanteric fractures using 3D-computed tomography (CT) scanning. Methods: This study used CT scan data taken from 50 elderly females (aged 70 years or older). Neck–shaft (NS) angle and height of the greater trochanter (GT) were measured under defined conditions (TPI: theoretical plane to place implant). Anterior curvature of the femoral shaft was also measured. Results: On average, the NS angle was found to be 128.1° and GT height was 62.4 mm. Average curvature radius was 1040 mm. As for the NS angle, the centrum-collum-diaphysis angles of existing implants (125° or 130°) are reasonable. In elderly Japanese patients, the proximal femur shows specific characteristics. As GT height is very short, the implant may easily interfere with the lateral cortex. Additionally, the curvature radius calculated (1040 mm) was smaller than that of past reports, indicating strong curvature in the Japanese elderly. Conclusion: Our measurement results are potentially useful in the avoidance of intraoperative trouble caused by mismatch of implants.

Original languageEnglish
JournalJournal of Orthopaedic Surgery
Volume27
Issue number1
DOIs
Publication statusPublished - Jan 1 2019

Fingerprint

Femur
Tomography
Femoral Fractures
Hip Fractures
Diaphyses
Thigh
Japan
Therapeutics

Keywords

  • computed tomography (CT)
  • curvature
  • femur
  • morphology

ASJC Scopus subject areas

  • Surgery

Cite this

The morphology of the femur in elderly Japanese females : Analysis using 3D-CT. / Maehara, Takashi; Kiyono, Masahiro; Noda, Tomoyuki; Sato, Ryozo; Kadota, Hiroaki; Hori, Tadahiro; Koga, Yoichi; Hidaka, Yoshihisa; Joko, Ryoji; Muraoka, Sosuke; Ozaki, Toshihumi.

In: Journal of Orthopaedic Surgery, Vol. 27, No. 1, 01.01.2019.

Research output: Contribution to journalArticle

Maehara, T, Kiyono, M, Noda, T, Sato, R, Kadota, H, Hori, T, Koga, Y, Hidaka, Y, Joko, R, Muraoka, S & Ozaki, T 2019, 'The morphology of the femur in elderly Japanese females: Analysis using 3D-CT', Journal of Orthopaedic Surgery, vol. 27, no. 1. https://doi.org/10.1177/2309499018816488
Maehara, Takashi ; Kiyono, Masahiro ; Noda, Tomoyuki ; Sato, Ryozo ; Kadota, Hiroaki ; Hori, Tadahiro ; Koga, Yoichi ; Hidaka, Yoshihisa ; Joko, Ryoji ; Muraoka, Sosuke ; Ozaki, Toshihumi. / The morphology of the femur in elderly Japanese females : Analysis using 3D-CT. In: Journal of Orthopaedic Surgery. 2019 ; Vol. 27, No. 1.
@article{60cc19a1cdea4aa9a944757a97b1a204,
title = "The morphology of the femur in elderly Japanese females: Analysis using 3D-CT",
abstract = "Background: While various implants are currently used for the treatment of femoral trochanteric fractures in Japan, ‘mismatches’ have been known to occur between patient and implant type. The purpose of this study is to identify morphological characteristics of elderly Japanese females, both in terms of the shape of proximal femur and its anterior curvature in order to evaluate the suitability of implants for treatment of femoral trochanteric fractures using 3D-computed tomography (CT) scanning. Methods: This study used CT scan data taken from 50 elderly females (aged 70 years or older). Neck–shaft (NS) angle and height of the greater trochanter (GT) were measured under defined conditions (TPI: theoretical plane to place implant). Anterior curvature of the femoral shaft was also measured. Results: On average, the NS angle was found to be 128.1° and GT height was 62.4 mm. Average curvature radius was 1040 mm. As for the NS angle, the centrum-collum-diaphysis angles of existing implants (125° or 130°) are reasonable. In elderly Japanese patients, the proximal femur shows specific characteristics. As GT height is very short, the implant may easily interfere with the lateral cortex. Additionally, the curvature radius calculated (1040 mm) was smaller than that of past reports, indicating strong curvature in the Japanese elderly. Conclusion: Our measurement results are potentially useful in the avoidance of intraoperative trouble caused by mismatch of implants.",
keywords = "computed tomography (CT), curvature, femur, morphology",
author = "Takashi Maehara and Masahiro Kiyono and Tomoyuki Noda and Ryozo Sato and Hiroaki Kadota and Tadahiro Hori and Yoichi Koga and Yoshihisa Hidaka and Ryoji Joko and Sosuke Muraoka and Toshihumi Ozaki",
year = "2019",
month = "1",
day = "1",
doi = "10.1177/2309499018816488",
language = "English",
volume = "27",
journal = "Journal of Orthopaedic Surgery",
issn = "1022-5536",
publisher = "Hong Kong Academy of Medicine Press",
number = "1",

}

TY - JOUR

T1 - The morphology of the femur in elderly Japanese females

T2 - Analysis using 3D-CT

AU - Maehara, Takashi

AU - Kiyono, Masahiro

AU - Noda, Tomoyuki

AU - Sato, Ryozo

AU - Kadota, Hiroaki

AU - Hori, Tadahiro

AU - Koga, Yoichi

AU - Hidaka, Yoshihisa

AU - Joko, Ryoji

AU - Muraoka, Sosuke

AU - Ozaki, Toshihumi

PY - 2019/1/1

Y1 - 2019/1/1

N2 - Background: While various implants are currently used for the treatment of femoral trochanteric fractures in Japan, ‘mismatches’ have been known to occur between patient and implant type. The purpose of this study is to identify morphological characteristics of elderly Japanese females, both in terms of the shape of proximal femur and its anterior curvature in order to evaluate the suitability of implants for treatment of femoral trochanteric fractures using 3D-computed tomography (CT) scanning. Methods: This study used CT scan data taken from 50 elderly females (aged 70 years or older). Neck–shaft (NS) angle and height of the greater trochanter (GT) were measured under defined conditions (TPI: theoretical plane to place implant). Anterior curvature of the femoral shaft was also measured. Results: On average, the NS angle was found to be 128.1° and GT height was 62.4 mm. Average curvature radius was 1040 mm. As for the NS angle, the centrum-collum-diaphysis angles of existing implants (125° or 130°) are reasonable. In elderly Japanese patients, the proximal femur shows specific characteristics. As GT height is very short, the implant may easily interfere with the lateral cortex. Additionally, the curvature radius calculated (1040 mm) was smaller than that of past reports, indicating strong curvature in the Japanese elderly. Conclusion: Our measurement results are potentially useful in the avoidance of intraoperative trouble caused by mismatch of implants.

AB - Background: While various implants are currently used for the treatment of femoral trochanteric fractures in Japan, ‘mismatches’ have been known to occur between patient and implant type. The purpose of this study is to identify morphological characteristics of elderly Japanese females, both in terms of the shape of proximal femur and its anterior curvature in order to evaluate the suitability of implants for treatment of femoral trochanteric fractures using 3D-computed tomography (CT) scanning. Methods: This study used CT scan data taken from 50 elderly females (aged 70 years or older). Neck–shaft (NS) angle and height of the greater trochanter (GT) were measured under defined conditions (TPI: theoretical plane to place implant). Anterior curvature of the femoral shaft was also measured. Results: On average, the NS angle was found to be 128.1° and GT height was 62.4 mm. Average curvature radius was 1040 mm. As for the NS angle, the centrum-collum-diaphysis angles of existing implants (125° or 130°) are reasonable. In elderly Japanese patients, the proximal femur shows specific characteristics. As GT height is very short, the implant may easily interfere with the lateral cortex. Additionally, the curvature radius calculated (1040 mm) was smaller than that of past reports, indicating strong curvature in the Japanese elderly. Conclusion: Our measurement results are potentially useful in the avoidance of intraoperative trouble caused by mismatch of implants.

KW - computed tomography (CT)

KW - curvature

KW - femur

KW - morphology

UR - http://www.scopus.com/inward/record.url?scp=85058482665&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85058482665&partnerID=8YFLogxK

U2 - 10.1177/2309499018816488

DO - 10.1177/2309499018816488

M3 - Article

C2 - 30798708

AN - SCOPUS:85058482665

VL - 27

JO - Journal of Orthopaedic Surgery

JF - Journal of Orthopaedic Surgery

SN - 1022-5536

IS - 1

ER -