Tuyển tập các báo cáo nghiên cứu về hóa học được đăng trên tạp chí sinh học quốc tế đề tài : Assessment of the primary rotational stability of uncemented hip stems using an analytical model: Comparison with finite element analyses | Journal of Orthopaedic Surgery and Research BioMed Central Open Access Assessment of the primary rotational stability of uncemented hip stems using an analytical model Comparison with finite element analyses Maria E Zeman 1 Nicolas Sauwen 1 Luc Labey1 Michiel Mulier2 Georges Van der Perre1 and Siegfried VN Jaecques 1 3 Address 1Katholieke Universiteit Leuven Division of Biomechanics and Engineering Design BMGO Celestijnenlaan 300C 3001 Heverlee Belgium 2University Hospitals Leuven UZ Leuven Orthopaedics Section Weligerveld 1 blok 2 - bus 7001 3212 Pellenberg Belgium and 3Katholieke Universiteit Leuven Department of Dentistry Oral Pathology and Maxillo-Facial Surgery BIOMAT Research Cluster Kapucijnenvoer 7 - bus 7001 3000 Leuven Belgium Email Maria E Zeman - mariazeman@ Nicolas Sauwen - n_sauwen@ Luc Labey - fb679840@ Michiel Mulier - Georges Van der Perre - Siegfried VN Jaecques - Corresponding author fEqual contributors Published 25 September 2008 Received 14 April 2008 Journal of Orthopaedic Surgery and Research 2008 3 44 doi 1749-799X-3-44 Accepted 25 September 2008 This article is available from http content 3 1 44 2008 Zeman et al licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License http licenses by which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. Abstract Background Sufficient primary stability is a prerequisite for the clinical success of cementless implants. Therefore it is important to have an estimation of the primary stability that can be achieved with new stem designs in a pre-clinical trial. Fast assessment of the primary stability is also useful in the preoperative planning of total hip replacements