Evidence map›Paper›PMID 39085879›Full record

ArticleJournal of orthopaedic surgery and research2024

Spherical varus rotational osteotomy of the femur using a navigation system as extra-articular surgery for extensive osteonecrosis of femoral head: a case control study.

Minoru Watanabe, Tsubasa Ishikawa, Satoshi Kagaya, Daichi Kuzushima, Itaru Kachi, Satoe Tanabe, Yasuoki Kobayashi, Koji Kanzaki

Abstract read
PubMed Full text at PMC Publisher
In one paragraph

Article in Journal of orthopaedic surgery and research, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.

0numbers the graph read from it
0cells of the map it votes in
3citing 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

3 citing papers in PubMed.

  1. Review
  2. Article
  3. Article
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

8 authors.

Minoru WatanabeDepartment of Orthopedic Surgery, Showa University Fujigaoka Hospital, 1-30 fujigaoka Aoba-ku, Yokohama, 227-8501, Japan. minoruwa@med.showa-u.ac.jp.
Tsubasa IshikawaDepartment of Orthopedic Surgery, Showa University Fujigaoka Hospital, 1-30 fujigaoka Aoba-ku, Yokohama, 227-8501, Japan.
Satoshi KagayaDepartment of Orthopedic Surgery, Showa University Fujigaoka Hospital, 1-30 fujigaoka Aoba-ku, Yokohama, 227-8501, Japan.
Daichi KuzushimaDepartment of Orthopedic Surgery, Showa University Fujigaoka Hospital, 1-30 fujigaoka Aoba-ku, Yokohama, 227-8501, Japan.
Itaru KachiDepartment of Orthopedic Surgery, Showa University Fujigaoka Hospital, 1-30 fujigaoka Aoba-ku, Yokohama, 227-8501, Japan.
Satoe TanabeDepartment of Orthopedic Surgery, Showa University Fujigaoka Hospital, 1-30 fujigaoka Aoba-ku, Yokohama, 227-8501, Japan.
Yasuoki KobayashiDepartment of Orthopedic Surgery, Showa University Fujigaoka Hospital, 1-30 fujigaoka Aoba-ku, Yokohama, 227-8501, Japan.
Koji KanzakiDepartment of Orthopedic Surgery, Showa University Fujigaoka Hospital, 1-30 fujigaoka Aoba-ku, Yokohama, 227-8501, Japan.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundCurved varus osteotomy (CVO) is an effective femoral head-preserving surgical procedure for osteonecrosis of the femoral head (ONFH) classified as type B or C1 according to the Japanese Investigation Committee (JIC) classification; it reportedly provides better postoperative outcomes than transtrochanteric rotational osteotomy (TRO). We have developed a new procedure called spherical varus rotational osteotomy (SVRO) in which osteotomy of the femur into a spherical shape is followed by varus and anterior rotation using navigation to increase indications and improve postoperative outcomes.

methodsNine joints of eight patients who underwent SVRO and could be followed up for > 1 year were included in the study. Disease types determined preoperatively according to the JIC classification were type C1 for four joints and type C2 for five joints. Preoperative disease JIC classification stages were 3a for eight joints and 1 for one joint. SVRO was performed using OrthoMap

resultsThe measurement results were as follows: surgery time, 130 min; blood loss, 200 ml; angle of varus, 20°; angle of anterior rotation, 30°; preoperative angle of anteversion, 15°; postoperative angle of anteversion, 22°; lower limb shortening, 11 mm; preoperative intact area occupancy, 0%; and postoperative intact area occupancy, 74.2%. There were no cases of progression in the postoperative stages or re-collapse.

conclusionSVRO allows for the repositioning of the exterior and posterior intact areas, providing a broader intact region postoperatively. This technique is particularly beneficial for young patients with ONFH and extensive necrosis and is a less invasive alternative to TRO. This procedure has been shown to be effective in achieving favorable outcomes in patients with extensive necrosis who would have otherwise required rotational osteotomy, depending on the necrosis location. Further longitudinal studies are necessary to validate these findings and establish long-term benefits.

Indexed as

Femur Head NecrosisOsteotomyAdultCase-Control StudiesFemaleFemurFollow-Up StudiesHumansMaleMiddle AgedRotationSurgical Navigation SystemsTreatment OutcomeYoung AdultCT-based navigationCurved varus osteotomy osteonecrosis of the femoral headExtensive necrosis

Identifiers

PMID39085879
PMCPMC11290192

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-ND
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.