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Tuyển tập các báo cáo nghiên cứu về hóa học được đăng trên tạp chí sinh học quốc tế đề tài : The effects of thermal capsulorrhaphy of medial parapatellar capsule on patellar lateral displacement | Journal of Orthopaedic Surgery and Research BioMed Central Research article The effects of thermal capsulorrhaphy of medial parapatellar capsule on patellar lateral displacement Naiquan Zheng 1 Brent R Davis2 and James R Andrews2 Address University of North Carolina at Charlotte Charlotte NC USA and 2American Sports Medicine Institute Birmingham AL USA Email Naiquan Zheng - nzheng@uncc.edu Brent R Davis - Brent.R.Davis@kp.org James R Andrews - James.Andrews@asmoc.com Corresponding author Open Access Published 30 September 2008 Received 19 November 2007 Journal of Orthopaedic Surgery and Research 2008 3 45 doi l0.ll86 l749-799X-3-45 Accepted 30 September 2008 This article is available from http www.josr-online.cOm content 3 1 45 2008 Zheng et al licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License http creativecommons.org licenses by 2.0 which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. Abstract Background The effectiveness of thermal shrinkage on the medial parapatellar capsule for treating recurrent patellar dislocation is controversial. One of reasons why it is still controversial is that the effectiveness is still qualitatively measured. The purpose of this study was to quantitatively determine the immediate effectiveness of the medial parapatellar capsule shrinkage as in clinical setting. Methods Nine cadaveric knees were used to collect lateral displacement data before and after medial shrinkage or open surgery. The force and displacement were recorded while a physician pressed the patella from the medial side to mimic the physical exam used in clinic. Ten healthy subjects were used to test the feasibility of the technique on patients and establish normal range of lateral displacement of the patella under a medial force. The force applied the resulting displacement and the ratio of force over displacement were .
