Radiological outcome analysis of transtrochanteric curved varus osteotomy for osteonecrosis of the femoral head at a mean follow-up of 12.4 years

G. Zhao, T. Yamamoto, Satoshi Ikemura, goro motomura, T. Mawatari, Yasuharu Nakashima, Y. Iwamoto

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

We investigated the factors related to the radiological outcome of a transtrochanteric curved varus osteotomy in patients with osteonecrosis of the hip. We reviewed 73 hips in 62 patients with a mean follow-up of 12.4 years (5 to 31.1). There were 28 men and 34 women, with a mean age of 33.3 years (15 to 68) at the time of surgery. The 73 hips were divided into two groups according to their radiological findings: group 1 showed progression of collapse and/or joint-space narrowing; group 2 had neither progressive collapse nor joint-space narrowing. Both of these factors and the radiological outcomes were analysed by a stepwise discriminant analysis. A total of 12 hips were categorised as group 1 and 61 as group 2. Both the post-operative intact ratio and the localisation of the necrotic lesion correlated with the radiological outcome. The cut-off point of the postoperative intact ratio to prevent the progression of collapse was 33.6%, and the cut-off point to prevent both the progression of collapse and joint-space narrowing was 41.9%. The results of this study indicate that a post-operative intact ratio of 33.0% is necessary if a satisfactory outcome is to be achieved after this varus osteotomy.

Original languageEnglish
Pages (from-to)781-786
Number of pages6
JournalJournal of Bone and Joint Surgery - Series B
Volume92
Issue number6
DOIs
Publication statusPublished - Jun 1 2010

Fingerprint

Osteonecrosis
Osteotomy
Thigh
Hip
Joints
Discriminant Analysis

All Science Journal Classification (ASJC) codes

  • Surgery
  • Orthopedics and Sports Medicine

Cite this

@article{92e28bcbb39d4c49a2915c58a3b624c0,
title = "Radiological outcome analysis of transtrochanteric curved varus osteotomy for osteonecrosis of the femoral head at a mean follow-up of 12.4 years",
abstract = "We investigated the factors related to the radiological outcome of a transtrochanteric curved varus osteotomy in patients with osteonecrosis of the hip. We reviewed 73 hips in 62 patients with a mean follow-up of 12.4 years (5 to 31.1). There were 28 men and 34 women, with a mean age of 33.3 years (15 to 68) at the time of surgery. The 73 hips were divided into two groups according to their radiological findings: group 1 showed progression of collapse and/or joint-space narrowing; group 2 had neither progressive collapse nor joint-space narrowing. Both of these factors and the radiological outcomes were analysed by a stepwise discriminant analysis. A total of 12 hips were categorised as group 1 and 61 as group 2. Both the post-operative intact ratio and the localisation of the necrotic lesion correlated with the radiological outcome. The cut-off point of the postoperative intact ratio to prevent the progression of collapse was 33.6{\%}, and the cut-off point to prevent both the progression of collapse and joint-space narrowing was 41.9{\%}. The results of this study indicate that a post-operative intact ratio of 33.0{\%} is necessary if a satisfactory outcome is to be achieved after this varus osteotomy.",
author = "G. Zhao and T. Yamamoto and Satoshi Ikemura and goro motomura and T. Mawatari and Yasuharu Nakashima and Y. Iwamoto",
year = "2010",
month = "6",
day = "1",
doi = "10.1302/0301-620X.92B6.23621",
language = "English",
volume = "92",
pages = "781--786",
journal = "Bone and Joint Journal",
issn = "2049-4394",
publisher = "British Editorial Society of Bone and Joint Surgery",
number = "6",

}

TY - JOUR

T1 - Radiological outcome analysis of transtrochanteric curved varus osteotomy for osteonecrosis of the femoral head at a mean follow-up of 12.4 years

AU - Zhao, G.

AU - Yamamoto, T.

AU - Ikemura, Satoshi

AU - motomura, goro

AU - Mawatari, T.

AU - Nakashima, Yasuharu

AU - Iwamoto, Y.

PY - 2010/6/1

Y1 - 2010/6/1

N2 - We investigated the factors related to the radiological outcome of a transtrochanteric curved varus osteotomy in patients with osteonecrosis of the hip. We reviewed 73 hips in 62 patients with a mean follow-up of 12.4 years (5 to 31.1). There were 28 men and 34 women, with a mean age of 33.3 years (15 to 68) at the time of surgery. The 73 hips were divided into two groups according to their radiological findings: group 1 showed progression of collapse and/or joint-space narrowing; group 2 had neither progressive collapse nor joint-space narrowing. Both of these factors and the radiological outcomes were analysed by a stepwise discriminant analysis. A total of 12 hips were categorised as group 1 and 61 as group 2. Both the post-operative intact ratio and the localisation of the necrotic lesion correlated with the radiological outcome. The cut-off point of the postoperative intact ratio to prevent the progression of collapse was 33.6%, and the cut-off point to prevent both the progression of collapse and joint-space narrowing was 41.9%. The results of this study indicate that a post-operative intact ratio of 33.0% is necessary if a satisfactory outcome is to be achieved after this varus osteotomy.

AB - We investigated the factors related to the radiological outcome of a transtrochanteric curved varus osteotomy in patients with osteonecrosis of the hip. We reviewed 73 hips in 62 patients with a mean follow-up of 12.4 years (5 to 31.1). There were 28 men and 34 women, with a mean age of 33.3 years (15 to 68) at the time of surgery. The 73 hips were divided into two groups according to their radiological findings: group 1 showed progression of collapse and/or joint-space narrowing; group 2 had neither progressive collapse nor joint-space narrowing. Both of these factors and the radiological outcomes were analysed by a stepwise discriminant analysis. A total of 12 hips were categorised as group 1 and 61 as group 2. Both the post-operative intact ratio and the localisation of the necrotic lesion correlated with the radiological outcome. The cut-off point of the postoperative intact ratio to prevent the progression of collapse was 33.6%, and the cut-off point to prevent both the progression of collapse and joint-space narrowing was 41.9%. The results of this study indicate that a post-operative intact ratio of 33.0% is necessary if a satisfactory outcome is to be achieved after this varus osteotomy.

UR - http://www.scopus.com/inward/record.url?scp=77953170367&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=77953170367&partnerID=8YFLogxK

U2 - 10.1302/0301-620X.92B6.23621

DO - 10.1302/0301-620X.92B6.23621

M3 - Article

VL - 92

SP - 781

EP - 786

JO - Bone and Joint Journal

JF - Bone and Joint Journal

SN - 2049-4394

IS - 6

ER -