Evidence map›Paper›PMID 32519945›Full record

SynthesisDeutsches Arzteblatt international2020

Conservative Versus Surgical Treatment for Primary Patellar Dislocation.

Jannik Frings, Peter Balcarek, Philippe Tscholl, Michael Liebensteiner, Florian Dirisamer, Paola Koenen

Open access · greenAbstract readSystematic Review
In one paragraph

Synthesis in Deutsches Arzteblatt international, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 36 papers.

0numbers the graph read from it
0cells of the map it votes in
36citing papers in PubMed
2.5field-weighted citation impact, top 11% 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

36 citing papers in PubMed, 50 citations in OpenAlex.

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  12. Management of first-time patellar dislocation: The ESSKA 2024 formal consensus-Part 1.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2025
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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

6 authors at 5 institutions in 3 countries.

Jannik FringsDepartment of Trauma and Orthopaedic Surgery, University Medical Center Hamburg-Eppendorf (UKE), Hamburg, Germany; ARCUS Kliniken Pforzheim, Pforzheim, Germany; Department of Orthopedic Surgery and Musculoskeletal Trauma Care Division, HUG-Hôpitaux Universitaires Genève, Geneva, Switzerland; Orthopedic Surgery, Medical University of Innsbruck, Innsbruck, Austria; Orthopedics & Sports Medicine Linz, UMIT - Private University for Health Sciences, Medical Informatics and Technology, Hall, Austria; Department of Orthopedics, Trauma Surgery and Sports Medicine, Cologne Merheim Medical Center, University of Witten/Herdecke, Cologne, Germany.
Peter Balcarek
Philippe Tscholl
Michael Liebensteiner
Florian Dirisamer
Paola Koenen
Hôpital Beau-Séjour · CHInnsbruck Medical University · ATStatistics Austria · ATUniversität Hamburg · DEUniversität Innsbruck · AT

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundPrimary patellar dislocation is often the initial manifestation of patellofemoral instability. Its long-term consequences can include recurrent dislocation and permanent dysfunction of the knee joint. There is no consensus on the optimal treatment of primary patellar dislocation in the relevant literature. The main prerequisite for a good long-term result is a realistic assessment of the risk of recurrent dislocation.

methodsWe carried out a systematic literature search in OvidSP (a search engine for full-text databases) and MEDLINE to identify suitable stratification models with respect to the risk of recurrent dislocation.

resultsIn the ten studies included in the current analysis, eight risk factors for recurrence after primary patellar dislocation were identified. Six studies revealed a higher risk in younger patients, particularly those under 16 years of age. The sex of the patient had no clear influence. In two studies, bilateral instability was identified as a risk factor. Two anatomical risk factors-a high-riding patella (patella alta) and trochlear dysplasia-were found to have the greatest influence in six studies. In a metaanalysis of five studies, patella alta predisposed to recurrent dislocation with an odds ratio (OR) of 4.259 (95% confidence interval [1.9; 9.188]). Moreover, a pathologically increased tibial tuberosity to trochlear groove (TT-TG) distance and rupture of the medial patellofemoral ligament (MPFL) on the femoral side were associated with higher recurrence rates. Patients with multiple risk factors in combination had a very high risk of recurrence.

conclusionThe risk of recurrent dislocation after primary patellar dislocation is increased by a number of risk factors, and even more so when multiple such risk factors are present. Published stratification models enable an assessment of the individual risk profile. Patients at low risk can be managed conservatively; surgery should be considered for patients at high risk.

Indexed as

Conservative TreatmentHumansPatellar DislocationRecurrenceRisk FactorsTreatment Outcome

Identifiers

PMID32519945
PMCPMC7370958
OpenAlexW3015843745

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.