Anthropometric assessment of Tibial Resection Surface Morphology in Total Knee Arthroplasty for tibial component design in Indian population

Research paper by Vivek Bansal, Abhishek Mishra; Tarun Verma; Dhruv Maini; Yugal Karkhur; L. Maini

Indexed on: 01 Mar '18Published on: 03 Jan '18Published in: Journal of Arthroscopy and Joint Surgery


Publication date: Available online 30 December 2017 Source:Journal of Arthroscopy and Joint Surgery Author(s): Vivek Bansal, Abhishek Mishra, Tarun Verma, Dhruv Maini, Yugal Karkhur, L. Maini Introduction An anthropometrically well designed knee prosthesis that matches properly to the resected surface of the bone is key for long term survivorship in TKA. Aim The aim of the study was to make an anthropometric analysis at resected surfaces of proximal tibia in Indian population and to compare it with the available data of other ethnicities. Methods- CT scans of 50 subjects were used to select the tibial resection surface. The surface selection was virtually done on each tibia at 8mm off the lateral plateau using Micro Dicom system (reflecting a 10-mm surgical cut assuming a cartilage thickness of 2mm). We measured the mediolateral, middle anteroposterior, medial and lateral anteroposterior dimensions, the aspect ratio and asymmetry metrics of the resected proximal tibial surface. Results The dimensions of the tibial plateau of Indian knees demonstrated significant differences according to gender (P<0.05) in terms of size. The shape parameters are not different significantly. When compared to all other ethnicities the Indian knee differs in size as well as the shape parameters i.e. Aspect ratio. Conclusion Clinically relevant differences in proximal tibia morphology at the level of proximal TKA resections across ethnicities can lead to mismatch of sizes of Western TKA implants in Indian patients. Tibial component designs should be done by considering the morphometry of knee in Indian population. Indian females were found to have significant smaller dimension of tibia in terms of size than. But the impact of small sample size and single centre on study warrant a multicentric study with large sample size.