CC BY-NC-ND 4.0 · Rev Bras Ortop (Sao Paulo) 2020; 55(02): 239-246
DOI: 10.1055/s-0039-3400516
Artigo Original
Quadril
Sociedade Brasileira de Ortopedia e Traumatologia. Published by Thieme Revinter Publicações Ltda Rio de Janeiro, Brazil

Pelvic Bone Deformity and Its Correlation with Acetabular Center-edge Angle[*]

Article in several languages: português | English
1  Grupo de Quadril do Hospital Ortopédico de Passo Fundo, Faculdade de Medicina da Universidade de Passo Fundo, Passo Fundo, RS, Brasil
,
Milton Valdomiro Roos
1  Grupo de Quadril do Hospital Ortopédico de Passo Fundo, Faculdade de Medicina da Universidade de Passo Fundo, Passo Fundo, RS, Brasil
,
Antero Camisa Júnior
1  Grupo de Quadril do Hospital Ortopédico de Passo Fundo, Faculdade de Medicina da Universidade de Passo Fundo, Passo Fundo, RS, Brasil
,
Ezequiel Moreno Ungaretti Lima
1  Grupo de Quadril do Hospital Ortopédico de Passo Fundo, Faculdade de Medicina da Universidade de Passo Fundo, Passo Fundo, RS, Brasil
,
Darby Lira Tisatto
1  Grupo de Quadril do Hospital Ortopédico de Passo Fundo, Faculdade de Medicina da Universidade de Passo Fundo, Passo Fundo, RS, Brasil
,
Marcel Cruz Argoud
1  Grupo de Quadril do Hospital Ortopédico de Passo Fundo, Faculdade de Medicina da Universidade de Passo Fundo, Passo Fundo, RS, Brasil
› Author Affiliations
Further Information

Publication History

30 November 2018

22 January 2019

Publication Date:
28 January 2020 (online)

Abstract

Objective The purpose of the present study was to evaluate the pelvic bone deformities and its correlation with the acetabular center-edge (CE) angle.

Methods Between August 2014 and April 2015, we prospectively evaluated patients aged between 20 and 60 years old. The exclusion criteria were: metabolic disease, previous hip or spine surgery, radiograph showing hip arthrosis ≥ Tönnis two, severe hip dysplasia, global acetabular overcoverage, acetabular crossover sign, hip deformities from slipped capital femoral epiphysis (SCFE) or Leg-Perthes-Calveé, and bad quality radiographs. At anteroposterior (AP) pelvic radiographs, we have evaluated: the CE angle, the acetabular index (IA), the acetabular crossover sign, the vertical and horizontal superior and inferior pelvic axis (H1: Horizontal line 1, superior pelvic axis; H2: Horizontal line 2, superior pelvic axis; V1: Vertical line, superior pelvic axis; HR: Horizontal line, inferior pelvic axis; VR: Vertical line, inferior pelvic axis). The superior and inferior pelvic axis were considered asymmetric when there was a difference ≥ 5 mm between both sides. Patients were divided into two groups: control and group 1.

Results A total of 228 patients (456 hips) were evaluated in the period. According to the established criteria, 93 patients were included. The mean age was 39.9 years old (20 to 60 years old, standard deviation [SD] = 10,5), and the mean CE angle in the right hip was 31.5° (20 o to 40°), and in the left 32.3° (20 o to 40°). The control group had 38 patients, with asymmetric H1 in 4 cases (10.5%), H2 in 5 (13.1%), V1 in 7 (18.4%), HR in 5 (13.1%) and VR in 1 (2.63%). Group 1 had 55 patients, with asymmetric H1 in 24 cases (43.6%), H2 in 50 (90.9%), V1 in 28 (50.9%), HR in 16 (29.09%) and VR in 8 (14.5%). Comparing both groups, there was statistical significance for H1, H2 and V1 asymmetry (p < 0.001).

Conclusion In the present paper, we observed the correlation between variation in the acetabular CE angle and asymmetry of the superior hemipelvis. The present authors believe that a better understanding of the pelvic morphologic alterations allows a greater facility in the diagnosis of hip articular deformities.

* Study conducted at the Hip Group of the Hospital Ortopédico de Passo Fundo, Faculdade de Medicina da Universidade de Passo Fundo, Passo Fundo, RS, Brazil.