Assessment of proximal femur anthropometry in south indian population through cadaveric bones and radiologically. Correlating difference if any between other ethnic groups,assessment of best fit implant for indian population

Chandan Noel, V (2015) Assessment of proximal femur anthropometry in south indian population through cadaveric bones and radiologically. Correlating difference if any between other ethnic groups,assessment of best fit implant for indian population. Masters thesis, PSG Institute of Medical Sciences and Research, Coimbatore.

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Abstract

INTRODUCTION: The morphology of the proximal femur is a topic of extensive research. The anatomy and anthropometry of proximal femur is subject to wide range of ethnic variations. The femurs of Asians & Indians are considered to be anthropometrically the smaller group. The conventional prosthesis in circulation are designed to the trends of European femora. Thus leading to various problems involved with implantation like intra op splintering of the proximal femur. The present study addresses these issues involving ethnic differences in the geometry of the proximal femur in Indians and other ethnicity. It also evaluates the adequacy of fit of the conventional femoral stems in Indian population. AIMS AND OBJECTIVES: To determine the proximal femur morphology in South Indian population determined with radiographs and from cadaveric dry bones To determine the differences between anthropometry of South Indian population and other ethnic groups. To determine the differences if any between the anthropometric parameters of male and female femurs. To estimate the dimensions of conventional cemented femoral stems (modular & monoblock bipolar) and imported modular for assessing the fit and fill in Indian femora. METHODS: Standardized pelvis with hip radiographs of 200 normal volunteers of indian origin were taken and the anthropometric parameters of proximal femur were templated. The parameters were compared with other Asian and European populations to estimate dfferences. The same parameters were templated in 50 dry bones and the fit of conventional proximal femoral prosthesis was assessed. CONCLUSIONS: In our study the comparison of average measurements in male and female femora. The male femora had larger dimensions in all the anthropometric parameters. The canal flare index in South-Indians was an average of 3.23 with 70% of the study population having normal CFI (3-4.5), 30% of the population having a stove pipe configuration CFI (<3). Majority of the Indian population favour a un-cemented fixation (70%). The Asian and Indian femur bone is of much smaller sizes in comparison to European femurs in terms of endosteal diameter and offset. The mean offset difference of 4.25mm and canal was larger in the European population At the neck osteotomy (level-D) the mean canal-implant difference was 2-3mm for all mono-block bipolar implants indicating a very tight fit. The implant was found to be oversized in 17% (SMPL) and 34% (ORMED) of the femurs. Thus accounting for the regular occurrence of proximal splintering with the use of the implant. In summary all current implants have to be revised on population basis to fit the changing anthropometry of our proximal femur.

Item Type: Thesis (Masters)
Uncontrolled Keywords: proximal femur anthropometry ; south indian population ; cadaveric bones ; radiologically ; Correlating difference ; ethnic groups ; implant ; indian population.
Subjects: MEDICAL > Orthopaedics
Depositing User: Subramani R
Date Deposited: 26 Sep 2017 01:10
Last Modified: 26 Sep 2017 01:10
URI: http://repository-tnmgrmu.ac.in/id/eprint/3350

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