Evidence map›Paper›PMID 41735567›Full record

ArticleInternational orthopaedics2026

Bilateral curved intertrochanteric varus osteotomy for osteonecrosis of the femoral head: a retrospective comparative study.

Kimihiro Oono, Yusuke Osawa, Hiroto Funahashi, Hiroaki Ido, Yasuhiko Takegami, Shiro Imagama

Abstract readClinical StudyComparative StudyComparative Study
PubMed Publisher
In one paragraph

Article in International orthopaedics, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

0numbers the graph read from it
0cells of the map it votes in
0citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

0 citing papers in PubMed.

No citing paper in PubMed yet.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors.

Kimihiro OonoDepartment of Orthopaedic Surgery, Nagoya University, Nagoya, Japan.
Yusuke OsawaDepartment of Orthopaedic Surgery, Nagoya University, Nagoya, Japan. ysk0568@yahoo.co.jp.
Hiroto FunahashiDepartment of Orthopaedic Surgery, Nagoya University, Nagoya, Japan.
Hiroaki IdoDepartment of Orthopaedic Surgery, Nagoya University, Nagoya, Japan.
Yasuhiko TakegamiDepartment of Integrated Health Sciences, Nagoya University, Nagoya, Japan.
Shiro ImagamaDepartment of Orthopaedic Surgery, Nagoya University, Nagoya, Japan.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundWhile curved intertrochanteric varus osteotomy is an effective treatment for osteonecrosis of the femoral head, whether this procedure is applicable to bilateral cases remains unclear. The aim of this study was to compare the clinical outcomes of bilateral curved intertrochanteric varus osteotomy and unilateral curved intertrochanteric varus osteotomy for osteonecrosis of the femoral head.

methodsThis comparative study included 60 patients with osteonecrosis of the femoral head; 15 (30 hips) underwent bilateral curved intertrochanteric varus osteotomy (bilateral group) and 45 (45 hips) underwent unilateral curved intertrochanteric varus osteotomy (unilateral group). Patients in the bilateral group were followed up for a mean of 8.0 years, whereas those in the unilateral group were followed-up for a mean of 8.2 years. The Harris Hip Score, complication rates, radiographic parameters, and survival rates were assessed. Conversion to total hip arthroplasty and radiographic failure were the endpoints.

resultsThe postoperative Harris Hip Score was significantly lower in the bilateral group than in the unilateral group. Complication rates and radiographic parameters were not significantly different between the groups. Ten-year survival rates, with conversion to total hip arthroplasty and radiographic failure as endpoints, did not differ significantly between the groups. In bilateral curved intertrochanteric varus osteotomy, the survival rate, with radiographic failure as the endpoint, tended to be poorer on the contralateral side than on the initial side.

conclusionThe clinical outcomes of bilateral curved intertrochanteric varus osteotomy were not necessarily favorable. When planning for bilateral curved intertrochanteric varus osteotomy, surgeons should ensure that the contralateral hip could undergo surgical intervention timeously.

Indexed as

Femur HeadFemur Head NecrosisHipOsteotomyAdultFemaleFollow-Up StudiesHumansMaleMiddle AgedPostoperative ComplicationsRadiographyRetrospective StudiesTreatment OutcomeBilateralContralateral sideCurved intertrochanteric varus osteotomyFemoral headOsteonecrosis

Identifiers

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.