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. 2022 Feb 15;57(4):612-618.
doi: 10.1055/s-0041-1741022. eCollection 2022 Aug.

Clinical Validation of the Glenoid Track Concept in Anterior Glenohumeral Instability

Mauro Emilio Conforto Gracitelli  1 , Frederico Lafraia Lobo  1 , Eduardo Angeli Malavolta  1 , Jorge Henrique Assunção  1 , Fernando Brandão de Andrade-Silva  1 , Arnaldo Amado Ferreira Neto  1
Affiliations

Clinical Validation of the Glenoid Track Concept in Anterior Glenohumeral Instability

Mauro Emilio Conforto Gracitelli et al. Rev Bras Ortop (Sao Paulo). .

Abstract

Objective To evaluate the correlation of the glenoid track and glenoidal bone loss with the recurrence dislocation rate and the Rowe score. Methods Retrospective study that assessed the glenoid track and glenoidal bone loss through preoperative magnetic resonance imaging. Patients undergoing primary arthroscopic repair of anterior Bankart were included. Patients with glenoidal bone loss greater than 21%, rotator cuff tear, scapular waist fracture, and posterior or multidirectional instability were not included. Rowe score were the primary outcome, and the recurrence rate was the secondary outcome. Results One hundred and two patients were included. Postoperative recurrent instability was reported by 8 patients (7.8%). Four patients (50%) in the group with recurrence presented glenoidal bone loss greater than 13.5% against 24 (25.5%) in the group without recurrence ( p = 0.210), with a negative predictive value of 94.6%. Three patients (37.5%) in the recurrence group were considered off-track, against 13 (13.8%) in the group without recurrence ( p = 0.109), with a negative predictive value of 94.2%. Patients with absolute glenoid track value ≤ 1.5 mm had worse results in relation to the recurrence group, with 6 patients (75%) presenting recurrence ( p = 0.003). Conclusion Off-track injury and glenoidal bone loss greater than the subcritical are not related to the recurrence rate and Rowe score, despite the high negative predictive value. The cut of the absolute value of the glenoid track at 1.5 mm had a significant relationship with the recurrence rate.

Keywords: Bankart lesions; glenoid cavity; shoulder dislocation.

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Conflict of interest statement

Conflito de Interesses Os autores declaram não haver conflito de interesses.

Figures

Fig. 1
Fig. 1
Axial slice of magnetic resonance imaging for evaluation of the Hill-Sachs interval (A).
Fig. 2
Fig. 2
Measurement of the anterior defect of the glenoid was performed by the perfect circle method in modified sagittal slice of the more lateral portion of glenoid on magnetic resonance imaging. The diameter of the glenoid (D) and the bone defect (C); calculation of the percentage of the anterior bone defect of the glenoid, using the formula: bone defect of the glenoid (%) = C/D.
Fig. 1
Fig. 1
Imagem axial de ressonância magnética para avaliação do intervalo de Hill-Sachs (A).
Fig. 2
Fig. 2
Medida do defeito anterior da cavidade glenoidal foi realizada pelo método do círculo perfeito em corte sagital modificado da porção mais lateral da cavidade glenoidal em ressonância magnética. O diâmetro da cavidade glenoidal (D) e do defeito ósseo (C); cálculo da porcentagem do defeito ósseo anterior da cavidade glenoidal, utilizando a fórmula: defeito ósseo da cavidade glenoidal (%) = C/D.
See this image and copyright information in PMC

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