Evidence map›Paper›PMID 34289826›Full record

ArticleBMC musculoskeletal disorders2021

Clinical outcomes and predictive factors for failure with MPFL reconstruction combined with tibial tubercle osteotomy and lateral retinacular release for recurrent patellar instability.

Peng Su, Xiumin Liu, Nengri Jian, Jian Li, Weili Fu

Open access · goldAbstract read
In one paragraph

Article in BMC musculoskeletal disorders, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
15citing papers in PubMed, 1 pooled it
1.8field-weighted citation impact, top 16% of its field
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

15 citing papers in PubMed, 1 synthesis or guideline pooled it, 35 citations in OpenAlex.

  1. Pooled it
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  6. Review
  7. Article
  8. Article
  9. Care for Pediatric Patellofemoral Instability Prior to Orthopaedic Referral.Journal of the Pediatric Orthopaedic Society of North America · 2025
    Article
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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

5 authors at 2 institutions in 1 country.

Peng Su *Department of Orthopaedic Surgery, West China Hospital, Sichuan University, 37 Guoxue lane, Wuhou District, Chengdu, China.
Xiumin Liu *Department of Radiology, West China Hospital, Sichuan University, 37 Guoxue Lane, Wuhou District, Chengdu, China.
Nengri JianDepartment of Radiology, West China Hospital, Sichuan University, 37 Guoxue Lane, Wuhou District, Chengdu, China.
Jian LiDepartment of Orthopaedic Surgery, West China Hospital, Sichuan University, 37 Guoxue lane, Wuhou District, Chengdu, China. hxlijian.china@163.com.
Weili FuDepartment of Orthopaedic Surgery, West China Hospital, Sichuan University, 37 Guoxue lane, Wuhou District, Chengdu, China. foxwin2008@163.com.
West China Hospital of Sichuan University · CNSichuan University · CN

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundMedial patellofemoral ligament (MPFL) reconstruction combined with tibial tubercle osteotomy (TTO) and lateral retinacular release (LRR) is one of the main treatment methods for patellar instability. So far, few studies have evaluated the clinical effectiveness and assessed potential risk factors for recurrent patellar instability. PURPOSE: To report the clinical outcomes of MPFL reconstruction combined with TTO and LRR at least three years after operation and to identify potential risk factors for recurrent patellar instability.

methodsA retrospective analysis of medical records for patients treated with MPFL, TTO and LRR from 2013 to 2017 was performed. Preoperative assessment for imaging examination included trochlear dysplasia according to Dejour classification, patella alta with the Caton-Deschamps index (CDI), tibial tubercle-trochlear groove distance. Postoperative assessment for knee function included Kujala, IKDC and Tegner scores. Failure rate which was defined by a postoperative dislocation was also reported.

resultsA total of 108 knees in 98 patients were included in the study. The mean age at operation was 19.2 ± 6.1 years (range, 13-40 years), and the mean follow-up was 61.3 ± 15.4 months (range, 36-92 months). All patients included had trochlear dysplasia (A, 24%; B, 17%; C, 35%; D, 24%), and 67% had patellar alta. The mean postoperative scores of Tegner, Kujala and IKDC were 5.3 ± 1.3 (2-8), 90.5 ± 15.5 (24-100) and 72.7 ± 12.1 (26-86). Postoperative dislocation happened in 6 patients (5.6%). Female gender was a risk factor for lower IKDC (70.7 vs 78.1, P = 0.006), Tegner (5.1 vs 6.0, P = 0.006) and Kujala (88.2 vs 96.6, P = 0.008). Age (p = 0.011) and trochlear dysplasia (p = 0.016) were considered to be two failure factors for MPFL combined with TTO and LRR.

conclusionAs a surgical method, MPFL combined with TTO and LRR would be a reliable choice with a low failure rate (5.6%). Female gender was a risk factor for worse postoperative outcomes. Preoperative failure risk factors in this study were age and trochlear dysplasia. LEVEL OF EVIDENCE: Level IV; Case series.

Indexed as

Joint InstabilityPatellar DislocationPatellofemoral JointFemaleHumansLigaments, ArticularOsteotomyRetrospective StudiesTibiaCaton-Deschamps indexLateral retinacular releaseMedial patellofemoral ligament reconstructionPatellar altaRecurrent patellar instabilityTibial tubercle osteotomyTibial tubercle–trochlear groove distanceTrochlear dysplasia

Identifiers

PMID34289826
PMCPMC8296593
OpenAlexW3186127639

What OpenQuestion holds

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LicenceCC BY
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.