Radiological outcome analyses of transtrochanteric posterior rotational osteotomy for osteonecrosis of the femoral head at a mean follow-up of 11 years

Garida Zhao, Takuaki Yamamoto, goro motomura, Kenyu Iwasaki, Ryosuke Yamaguchi, Satoshi Ikemura, Yukihide Iwamoto

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Background: This study investigated the radiological factors that correlated with progression of collapse and joint space narrowing after transtrochanteric posterior rotational osteotomy (PRO) for osteonecrosis of the femoral head. Methods: This study reviewed 51 hips in 47 patients with a mean follow-up of 11 years (5-20). The subjects included 29 males and 18 females with a mean age of 34 years (12-54) at the time of surgery. The 51 hips were divided into two groups based on the radiological outcome (group I: evidence of progression of collapse and/or joint space narrowing, group II: no evidence of either progression of collapse or joint space narrowing). Both clinical and radiological factors were analyzed by both univariate and multivariable analyses. Results: Six hips were categorized as group I and 45 hips were categorized as group II. The postoperative intact ratio and preoperative stage were significantly correlated with the radiological outcome in both univariate (P < 0.0001, P = 0.006) and multivariate (P = 0.0014, P = 0.0039) analysis. The cutoff point for the postoperative intact ratio (the minimum ratio required to prevent both progression of collapse and joint space narrowing) was 36.8 %. Conclusions: The results of this study indicate that the postoperative intact ratio is one of the main influences on progression of collapse and/or joint space narrowing after PRO, and should be at least 36.8 %. An increased awareness of this critical ratio would be useful for planning the optimal use of this procedure.

Original languageEnglish
Pages (from-to)277-283
Number of pages7
JournalJournal of Orthopaedic Science
Volume18
Issue number2
DOIs
Publication statusPublished - Jan 1 2013

Fingerprint

Osteonecrosis
Osteotomy
Thigh
Joints
Hip

All Science Journal Classification (ASJC) codes

  • Orthopedics and Sports Medicine

Cite this

Radiological outcome analyses of transtrochanteric posterior rotational osteotomy for osteonecrosis of the femoral head at a mean follow-up of 11 years. / Zhao, Garida; Yamamoto, Takuaki; motomura, goro; Iwasaki, Kenyu; Yamaguchi, Ryosuke; Ikemura, Satoshi; Iwamoto, Yukihide.

In: Journal of Orthopaedic Science, Vol. 18, No. 2, 01.01.2013, p. 277-283.

Research output: Contribution to journalArticle

@article{e0fc4c805ed94ec88b7a5344a3e645a0,
title = "Radiological outcome analyses of transtrochanteric posterior rotational osteotomy for osteonecrosis of the femoral head at a mean follow-up of 11 years",
abstract = "Background: This study investigated the radiological factors that correlated with progression of collapse and joint space narrowing after transtrochanteric posterior rotational osteotomy (PRO) for osteonecrosis of the femoral head. Methods: This study reviewed 51 hips in 47 patients with a mean follow-up of 11 years (5-20). The subjects included 29 males and 18 females with a mean age of 34 years (12-54) at the time of surgery. The 51 hips were divided into two groups based on the radiological outcome (group I: evidence of progression of collapse and/or joint space narrowing, group II: no evidence of either progression of collapse or joint space narrowing). Both clinical and radiological factors were analyzed by both univariate and multivariable analyses. Results: Six hips were categorized as group I and 45 hips were categorized as group II. The postoperative intact ratio and preoperative stage were significantly correlated with the radiological outcome in both univariate (P < 0.0001, P = 0.006) and multivariate (P = 0.0014, P = 0.0039) analysis. The cutoff point for the postoperative intact ratio (the minimum ratio required to prevent both progression of collapse and joint space narrowing) was 36.8 {\%}. Conclusions: The results of this study indicate that the postoperative intact ratio is one of the main influences on progression of collapse and/or joint space narrowing after PRO, and should be at least 36.8 {\%}. An increased awareness of this critical ratio would be useful for planning the optimal use of this procedure.",
author = "Garida Zhao and Takuaki Yamamoto and goro motomura and Kenyu Iwasaki and Ryosuke Yamaguchi and Satoshi Ikemura and Yukihide Iwamoto",
year = "2013",
month = "1",
day = "1",
doi = "10.1007/s00776-012-0347-0",
language = "English",
volume = "18",
pages = "277--283",
journal = "Journal of Orthopaedic Science",
issn = "0949-2658",
publisher = "Springer Japan",
number = "2",

}

TY - JOUR

T1 - Radiological outcome analyses of transtrochanteric posterior rotational osteotomy for osteonecrosis of the femoral head at a mean follow-up of 11 years

AU - Zhao, Garida

AU - Yamamoto, Takuaki

AU - motomura, goro

AU - Iwasaki, Kenyu

AU - Yamaguchi, Ryosuke

AU - Ikemura, Satoshi

AU - Iwamoto, Yukihide

PY - 2013/1/1

Y1 - 2013/1/1

N2 - Background: This study investigated the radiological factors that correlated with progression of collapse and joint space narrowing after transtrochanteric posterior rotational osteotomy (PRO) for osteonecrosis of the femoral head. Methods: This study reviewed 51 hips in 47 patients with a mean follow-up of 11 years (5-20). The subjects included 29 males and 18 females with a mean age of 34 years (12-54) at the time of surgery. The 51 hips were divided into two groups based on the radiological outcome (group I: evidence of progression of collapse and/or joint space narrowing, group II: no evidence of either progression of collapse or joint space narrowing). Both clinical and radiological factors were analyzed by both univariate and multivariable analyses. Results: Six hips were categorized as group I and 45 hips were categorized as group II. The postoperative intact ratio and preoperative stage were significantly correlated with the radiological outcome in both univariate (P < 0.0001, P = 0.006) and multivariate (P = 0.0014, P = 0.0039) analysis. The cutoff point for the postoperative intact ratio (the minimum ratio required to prevent both progression of collapse and joint space narrowing) was 36.8 %. Conclusions: The results of this study indicate that the postoperative intact ratio is one of the main influences on progression of collapse and/or joint space narrowing after PRO, and should be at least 36.8 %. An increased awareness of this critical ratio would be useful for planning the optimal use of this procedure.

AB - Background: This study investigated the radiological factors that correlated with progression of collapse and joint space narrowing after transtrochanteric posterior rotational osteotomy (PRO) for osteonecrosis of the femoral head. Methods: This study reviewed 51 hips in 47 patients with a mean follow-up of 11 years (5-20). The subjects included 29 males and 18 females with a mean age of 34 years (12-54) at the time of surgery. The 51 hips were divided into two groups based on the radiological outcome (group I: evidence of progression of collapse and/or joint space narrowing, group II: no evidence of either progression of collapse or joint space narrowing). Both clinical and radiological factors were analyzed by both univariate and multivariable analyses. Results: Six hips were categorized as group I and 45 hips were categorized as group II. The postoperative intact ratio and preoperative stage were significantly correlated with the radiological outcome in both univariate (P < 0.0001, P = 0.006) and multivariate (P = 0.0014, P = 0.0039) analysis. The cutoff point for the postoperative intact ratio (the minimum ratio required to prevent both progression of collapse and joint space narrowing) was 36.8 %. Conclusions: The results of this study indicate that the postoperative intact ratio is one of the main influences on progression of collapse and/or joint space narrowing after PRO, and should be at least 36.8 %. An increased awareness of this critical ratio would be useful for planning the optimal use of this procedure.

UR - http://www.scopus.com/inward/record.url?scp=84879686821&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84879686821&partnerID=8YFLogxK

U2 - 10.1007/s00776-012-0347-0

DO - 10.1007/s00776-012-0347-0

M3 - Article

C2 - 23344931

AN - SCOPUS:84879686821

VL - 18

SP - 277

EP - 283

JO - Journal of Orthopaedic Science

JF - Journal of Orthopaedic Science

SN - 0949-2658

IS - 2

ER -