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      Estudo radiográfico do índice acromial e sua relação com as lesões do manguito rotador Translated title: Radiographic analysis of the acromion index and its association with rotator cuff tears

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          Abstract

          OBJETIVO: O objetivo deste estudo é avaliar a relação da projeção lateral do acrômio com as lesões do manguito rotador (LMR) na população brasileira. MÉTODOS: A projeção lateral do acrômio foi mensurada por meio de radiografias de ombros em sua incidência anteroposterior realizadas com a cavidade glenoidal em seu perfil absoluto e a cabeça do úmero em rotação neutra ou medial. Foi aferido o índice acromial (IA) pela razão entre a distância do plano da cavidade glenoidal ao extremo lateral do acrômio e a distância do plano da cavidade glenoidal ao extremo lateral da cabeça do úmero. Este índice foi mensurado em 83 indivíduos (idade média de 54 anos) com LMR e comparados com um grupo de 28 indivíduos (idade média de 48 anos) que não as apresentavam. A presença ou ausência de LMR foi evidenciada por meio de ressonância magnética. RESULTADOS: O IA médio foi de 0,7194 nos pacientes com LMR e de 0,6677 nos indivíduos que não a apresentavam na população brasileira. Essa diferença foi estatisticamente significativa com um p = 0,001. CONCLUSÃO: Pode-se estabelecer relação do IA e lesão do manguito rotador na população brasileira.

          Translated abstract

          OBJECTIVE: The purpose of this study is to evaluate the association between lateral extension of the acromion and rotator cuff tears (RCT) in the Brazilian population. METHODS: Lateral extension of the acromion was measured using anteroposterior radiographs of the shoulders, carried out with glenoid cavity in the absolute profile and the humeral head in neutral or internal rotation. The acromion index (AI) was defined by the ratio of the distance from the glenoid cavity to the lateral border of the acromion, and the distance from the glenoid cavity to the lateral border of the humeral head. This index was measured in 83 patients with (average age 54 years) with RCT and compared with a group with 28 patients (average age 48 years) without RCT. The presence or absence of RCT was defined by Magnetic resonance Imaging. RESULTS: The average AI was 0.7194 in the patients with RCT and 0.6677 in the individuals without RCT, in the Brazilian population. This difference was highly significant, with P< 0.001. CONCLUSION: An association can be established between AI and rotator cuff tear in the Brazilian population.

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          Impingement Lesions

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            Association of a large lateral extension of the acromion with rotator cuff tears.

            Factors predisposing to tearing of the rotator cuff are poorly understood. We have observed that the acromion of patients with a rotator cuff tear very often appears large on anteroposterior radiographs or during surgery. The purpose of this study was to quantify the lateral extension of the acromion in patients with a full-thickness rotator cuff tear and in patients with an intact rotator cuff. The lateral extension of the acromion was assessed on true anteroposterior radiographs made with the arm in neutral rotation. The distance from the glenoid plane to the lateral border of the acromion was divided by the distance from the glenoid plane to the lateral aspect of the humeral head to calculate the acromion index. This index was determined in a group of 102 patients (average age, 65.0 years) with a proven full-thickness rotator cuff tear, in an age and gender-matched group of forty-seven patients (average age, 63.7 years) with osteoarthritis of the shoulder and an intact rotator cuff, and in an age and gender-matched control group of seventy volunteers (average age, 64.4 years) with an intact rotator cuff as demonstrated by ultrasonography. The average acromion index (and standard deviation) was 0.73 +/- 0.06 in the shoulders with a full-thickness tear, 0.60 +/- 0.08 in those with osteoarthritis and an intact rotator cuff, and 0.64 +/- 0.06 in the asymptomatic, normal shoulders with an intact rotator cuff. The difference between the index in the shoulders with a full-thickness supraspinatus tear and the index in those with an intact rotator cuff was highly significant (p < 0.0001). A large lateral extension of the acromion appears to be associated with full-thickness tearing of the rotator cuff.
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              Anterior acromioplasty for the chronic impingement syndrome in the shoulder: a preliminary report

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                Author and article information

                Journal
                rbort
                Revista Brasileira de Ortopedia
                Rev. bras. ortop.
                Sociedade Brasileira de Ortopedia e Traumatologia (São Paulo, SP, Brazil )
                0102-3616
                1982-4378
                2010
                : 45
                : 2
                : 151-154
                Affiliations
                [01] orgnameFaculdade de Ciências Médicas da Santa Casa de São Paulo orgdiv1Departamento de Ortopedia e Traumatologia
                [02] orgnameFaculdade de Ciências Médicas da Santa Casa de São Paulo orgdiv1Departamento de Ortopedia e Traumatologia
                [05] orgnameFaculdade de Ciências Médicas da Santa Casa de São Paulo
                Article
                S0102-36162010000200008 S0102-3616(10)04500208
                e0c94eec-2e06-4b64-aacd-3e69583de7c6

                This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

                History
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 12, Pages: 4
                Product

                SciELO Brazil

                Categories
                Artigos Originais

                Bainha rotadora,Radiography,Acrominon,Rotator cuff,Radiografia,Acrômio

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