Positioning of the acetabular component in cemented prostheses - radiographic calculation

OBJECTIVE: to assess the reliability of the inclination angle and anteversion of acetabular cup component in patients with idiopatic osteoarthritis of the hip, aseptic necrosis and hip neck fracture using trigonometric formula and plain radiographs. METHODS: 66 patients underwent cemented total arthroplasty of 72 hips. The inclination of acetabular component was measured using plain radiograph. The acetabular component anteversion was measured using trigonometric formula. RESULTS: it was observed that, in the osteoarthritic hips, hip neck fracture and aseptic necrosis, the degree of agreement was highly significant (p < 0.0001), in the measurements of anteversion and inclination angles, among the three assessments, from intra as well as inter-observers. All the agreement pairs were of excellent degree (ICC > 0.80). CONCLUSION: using plain radiographs and trigonometric formula, the method resulted to be highly accurate and reliable. Besides being easy to be calculated. No significant variation was found in the anteversion and inclination angles when compared with osteoarthritis of the hip, aseptic necrosis and hip neck fracture.

Bibliographic Details

Main Authors:	Labronici,Pedro José, Motta,Ramon Louro, Esteves,Bruno Bandeira, Franco,José Sergio, Hoffmann,Rolix, Ferreira,Luiz Aurélio Costa, Giordano,Marcos, Alves,Sergio Delmonte
Format:	Digital revista
Language:	English
Published:	Sociedade Brasileira de Ortopedia e Traumatologia 2013
Online Access:	http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0102-36162013000100062
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