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      A Scientometric Analysis of Studies on Patellar Dislocation

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          Abstract

          Background:

          Patellar dislocation is attracting considerable research interest.

          Purpose:

          To assess studies on patellar dislocation using a scientometric method to better understand the current status of research and explore future study directions.

          Study Design:

          Scoping review.

          Methods:

          The Web of Science Core Collection database was selected to retrieve publications on patellar dislocation. Articles and reviews written in English with patellar dislocation as the main topic were included. Conference abstracts, notes, letters, expert opinions, and animal studies were excluded. A total of 4632 articles were identified in our initial search. In addition, Excel 2019, CiteSpace 6.1.R1, and VOSviewer 1.6.9 were used to analyze the h-index, the most highly cited publication, publication essentials, and research themes.

          Results:

          A total of 1485 articles were included in our analysis, with 36,608 citations and an h-index of 93. Overall, 1494 institutions and 195 journals were identified from these studies. The United States (n = 531) was the most productive country. The institution and journal with the largest number of articles were the Hospital for Special Surgery (n = 59) and Knee Surgery, Sports Traumatology, Arthroscopy (n = 212), respectively. The article “Scoring of Patellofemoral Disorders” by Kujala et al in 1993 was the most highly cited reference. The most commonly found terms used were patellar dislocation, patellar instability, medial patellofemoral ligament, knee, recurrent patellar dislocation, and soft tissue restraints. Four topics were identified after clustering analysis of key terms: risk factors, medial patellofemoral ligament reconstruction, patellar dislocation in skeletally immature patients, and lateral retinacular release.

          Conclusion:

          This scientometric review of articles on patellar dislocation summarized the current status of research (countries, institutions, and authors) and identified potential research directions.

          Related collections

          Most cited references75

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          Radiographic landmarks for femoral tunnel placement in medial patellofemoral ligament reconstruction.

          Philip Schöttle, Arno Schmeling, Nikolaus Rosenstiel … (2007)
          Reconstruction of the medial patellofemoral ligament has recently become popular for restoring patellofemoral stability. Femoral insertion site anatomy of the medial patellofemoral ligament has been described. This anatomical insertion has been inferred to be the isometric point in medial patellofemoral ligament reconstruction, but data about radiographic landmarks for a postoperative or intraoperative control are missing. To determine the radiographic landmarks for control of postoperative and intraoperative femoral medial patellofemoral ligament insertion. Descriptive laboratory study. Eight fresh-frozen human knees were dissected, and the medial patellofemoral ligament was exposed. After identification of the femoral medial patellofemoral ligament insertion site, the insertion center was marked with a lead ball of 2-mm diameter. Straight lateral radiographs were taken, and posterior-anterior as well as proximal-distal position were evaluated. Six of 8 insertion points were anterior to a line representing an extension of the posterior cortex, 1 point was touching this line, and 1 point was posterior to it. All points were situated distal to the posterior origin of the medial femoral condyle and proximal to the most posterior point of the Blumensaat line. A reproducible anatomical and radiographic point, 1 mm anterior to the posterior cortex extension line, 2.5 mm distal to the posterior origin of the medial femoral condyle, and proximal to the level of the posterior point of the Blumensaat line on a lateral radiograph with both posterior condyles projected in the same plane, shows the mean femoral medial patellofemoral ligament center. This radiographic point may be useful both intraoperatively and postoperatively.
          Article 0 comments Cited 150 times – based on 0 reviews     Review now
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            Factors of patellar instability: an anatomic radiographic study.

            H DEJOUR, L Nové-Josserand, C Guier … (1993)
            We analyzed the radiographs and computed tomography (CT) scans of 143 knees operated on for symptomatic patellar instability and 67 contralateral asymptomatic knees, together with 190 control knee radiographs and 27 control knee scans, to determine the factors affecting patellar instability. Four factors were relevant in knees with symptomatic patellar instability: (1) Trochlear dysplasia (85%), as defined by the crossing sign (96%) and quantitatively expressed by the trochlear bump, pathological above 3 mm or more (66%), and the trochlear depth, pathologic at 4 mm or less. (2) Quadriceps dysplasia (83%), defined a present when the patellar tilt in extension is more than 20% on the CT scans. (3) Patella alta (Caton-Deschamps) index greater than or equal to 1.2 (24%). (4) Tibial tuberosity-trochlear groove, pathological when greater than or equal to 20 mm (56%). The factors appeared in only 3%-6.5% of the control knees. The etiology of patellar instability is multifactorial. Determination of the factors permits an effective elective therapeutic plan which aims at correcting the anomalies present.
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              Epidemiology and natural history of acute patellar dislocation.

              Donald Fithian, Elizabeth Paxton, Mary Lou Stone … (2015)
              The goals of this study were to (1) define the epidemiology of acute patellar dislocation, (2) determine the risk of subsequent patellar instability episodes (subluxation and/or redislocation) during the study period, and (3) identify risk factors for subsequent instability episodes. Prospective cohort study. The authors prospectively followed 189 patients for a period of 2 to 5 years. Historical data, injury mechanisms, and physical and radiographic measurements were recorded to identify potential risk factors for poor outcomes. Risk was highest among females 10 to 17 years old. Patients presenting with a prior history of instability were more likely to be female (P < .05) and were older than first-time dislocation patients (P < .05). Fewer first-time dislocators (17%) had episodes of instability during follow-up than patients with a previous history of instability (49%) (P < .01). After adjusting for demographics, patients with a prior history had 7 times higher odds of subsequent instability episodes during follow-up than first time dislocators (adjusted odds ratio = 6.6, P < .001). Patellar dislocators who present with a history of patellofemoral instability are more likely to be female, are older, and have greater risk of subsequent patellar instability episodes than first-time patellar dislocators. Risk of recurrent patellar instability episodes in either knee is much higher in this group than in first-time dislocators. Copyright 2004 American Orthopaedic Society for Sports Medicine
              Article 0 comments Cited 146 times – based on 0 reviews     Review now
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                Author and article information

                Journal
                Journal ID (nlm-ta): Orthop J Sports Med
                Journal ID (iso-abbrev): Orthop J Sports Med
                Journal ID (publisher-id): OJS
                Journal ID (hwp): spojs
                Title: Orthopaedic Journal of Sports Medicine
                Publisher: SAGE Publications (Sage CA: Los Angeles, CA )
                ISSN (Electronic): 2325-9671
                Publication date (Electronic): 25 November 2022
                Publication date Collection: November 2022
                Volume: 10
                Issue: 11
                Electronic Location Identifier: 23259671221137051
                Affiliations
                [* ]Department of Orthopaedics, Lanzhou University Second Hospital, Orthopedic Clinical Medical Research Center of Gansu Province, Intelligent Orthopedic Industry Technology Center of Gansu Province, Lanzhou, China. H.W. and Z.Y. contributed equally to this work.
                [2-23259671221137051] Investigation performed at the Department of Orthopaedics, Lanzhou University Second Hospital, Lanzhou, China
                Author notes
                [*] [† ]Yayi Xia, MD, PhD, Department of Orthopaedics, Lanzhou University Second Hospital, No. 82 Cuiyingmen, Chengguan District, Lanzhou City, Gansu Province, 730000, China (email: xyy123456a@ 123456126.com ).

                H.W. and Z.Y. contributed equally to this work.

                Article
                Publisher ID: 10.1177_23259671221137051
                DOI: 10.1177/23259671221137051
                PMC ID: 9703555
                PubMed ID: 36452338
                SO-VID: 108ca1f9-3e8e-4740-941f-1e81f4d8047a
                Copyright © © The Author(s) 2022
                License:

                This article is distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 License ( https://creativecommons.org/licenses/by-nc-nd/4.0/) which permits non-commercial use, reproduction and distribution of the work as published without adaptation or alteration, without further permission provided the original work is attributed as specified on the SAGE and Open Access pages ( https://us.sagepub.com/en-us/nam/open-access-at-sage).

                History
                Date received : 26 August 2022
                Date accepted : 30 August 2022
                Categories
                Subject: Article
                Custom metadata
                typesetter ts3

                Keywords: patellar dislocation,scientometric analysis,citation analysis,citespace,research hotspots
                Data availability:
                Keywords: patellar dislocation, scientometric analysis, citation analysis, citespace, research hotspots

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