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2014, Number 2

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Revista Cubana de Ortopedia y Traumatología 2014; 28 (2)

A ten-year sensitometric study of femoral remodeling after implantation of an anatomical stem

Aguilar EA, Panisello SJJ, Mateo AJJ

Language: Spanish
References: 27
Page: 168-180
PDF size: 286.15 Kb.


ABSTRACT

Introduction: Dual X-ray absorptiometry is commonly used to quantify periprosthetic bone remodeling, usually for short-term follow up.
Objective: determine patterns of remodeling caused by anatomical stem, by quantifying changes in bone mineral density in the 7 Gruen zones during follow up and analyze the influence of other factors in bone remodeling.
Methods: a prospective study (10 year follow-up) was performed to a group of 39 patients undergoing uncemented total hip prosthesis. The healthy hip was used as control. Dual X-ray absorptiometry in Gruen zones 7 was used to quantify the femoral periprosthetic remodeling. Bone mass measurements were performed at 15 days, 1, 3 and 10 years after surgery on the non-operated hip, and at 15 days, 1, 3, 5 and 10 years of operation in the prosthetic hip. The influence of other factors in bone remodeling (sex, body mass index, and preoperative bone mass) was also analyzed.
Results: 7 % of decrease in bone mineral density was found in Gruen zone 1 and 24.1 % was found in Gruen zone 7 at the end of the tenth year of follow up. Sex, body mass index and preoperative bone density were not statistically significant in its influence on bone remodeling.
Conclusions: periprosthetic bone remodeling depends mainly on the implant. No correlation has been found with sex, body mass index and preoperative preoperative bone density.


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