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|Title:||In vitro hip testing in the International Society of Biomechanics coordinate system|
|Keywords:||Science & Technology;Life Sciences & Biomedicine;Technology;Biophysics;Engineering, Biomedical;Engineering;Hip;In vitro;Bone pots;Coordinate system;Reference frame;ACETABULAR LABRUM;CAPSULAR LIGAMENTS;PART 1;JOINT;MOTION;STABILITY;ARTHROPLASTY;CONSTRAINTS;POSITION;RANGE;Bone pots;Coordinate system;Hip;In vitro;Reference frame;Biomedical Engineering;0903 Biomedical Engineering;1106 Human Movement And Sports Science;0913 Mechanical Engineering|
|Issue Date:|| 99|
|Description:||Many innovative experiments are designed to answ er research questions about hip biomechanics, however many fail to define a coordinate system. This makes comparisons between studies unreliable and is an unnecessary hurdle in extrapolating experimental results to clinical reality. The aim of this study was to present a specimen mounting protocol which aligns and registers hip specimens in the International Society of Biomechanics (ISB) coordinate system, which is defined by bony landmarks that are identified by palpation of the patient???s body. This wou ld enable direct comparison between experimental testing and clinical gait analysis or radiographic studies. To represent the intact hip, four intact synthetic full - pelves with 8 full - length articulating femora were assembled and digitised to define the IS B coordinate system. Using our proposed protocol, pelvis specimens were bisected into left and right hemi - pelves and femora transected at the mid - shaft, and then mounted in bone pots to represent a typical experimental setup. Anatomical landmarks were re - digitised relative to mechanical features of the bone pots and the misalignment was calculated. The mean misalignment was found to be less than 1.5?? flexion/extension, ab/adduction and internal/external rotation for both the pelves and femora; this equate s to less than 2.5 % of a normal range of hip motion. The proposed specimen mounting protocol provides a simple method to align in vitro hip specimens in the ISB coordinate system which enables improved comparison between laboratory testing and clinical s tudies. Engineering drawings are provided to allow others to replicate the simple fixtures used in the protocol.|
|Type Of Material:||OTHER|
|Appears in Collections:||Mechanical Engineering|
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