INTRODUCTION: The recent surge of interest in double bundle Anterior Cruciate Ligament reconstruction techniques has arisen from the biomechanical theory that the technique allows better postoperative tolerance of complex knee activity because it recreates both a posterolateral and anteromedial bundle of the ACL while traditional transtibial single bundle techniques recreate only the anteromedi...

OBJECTIVE To carry out a biomechanical study of four techniques for fixation of four-part humeral head fractures. METHODS The fracture was reproduced in 40 plastic humeri, divided into groups of ten according to the fixation technique, each one employing different fixation resources, in different configurations. The humeral models were mounted on an aluminum scapula, with leather straps simul...

The financial cost of using human tissues in biomedical testing and surgical reconstruction is predicted to increase at a rate that is disproportionately greater than other materials used in biomechanical testing. Our first hypothesis is that cadaveric proximal humeri that had undergone monotonic failure testing of simulated rotator cuff repairs would not differ in ultimate fracture loads or in...

and accessory rods at PSO level. Testing evaluated (1) accessory Study Design. In vitro cadaveric biomechanical study. Objective. To assess effects of 4-rod reconstruction, rod material, and anterior column support on motion and surface rod strain in a pedicle subtraction osteotomy model. Summary of Background Data. Pedicle subtraction osteotomy (PSO) can correct significant sagittal deformity ...

The purpose of this study is to evaluate ultrasonic suture welding of monofilament suture in an animal model of rotator cuff repair with biomechanical and histologic analyses. We randomly assigned 46 shoulders in 23 rabbits to 1 of 3 treatment groups: sham-operated (n = 15), knotted (n = 15), and welded (n = 16). Supraspinatus defects were surgically created and acutely repaired with suture anc...

Biomechanical modelling and simulation techniques offer some hope for unravelling the complex inter-relationships of structure and function perhaps even for extinct organisms, but have their limitations owing to this complexity and the many unknown parameters for fossil taxa. Validation and sensitivity analysis are two indispensable approaches for quantifying the accuracy and reliability of suc...

OBJECTIVE To evaluate fixation properties of a new intervertebral anchored fusion device and compare these with ventral locking plate fixation. STUDY DESIGN In vitro biomechanical evaluation. ANIMALS Cadaveric canine C4-C7 cervical spines (n = 9). METHODS Cervical spines were nondestructively loaded with pure moments in a nonconstraining testing apparatus to induce flexion/extension while...

In this study, we examine the effect of collagenase, elastase and glutaraldehyde treatments on the response of porcine aorta to controlled peel testing. Specifically, the effects on the tissue׳s resistance to dissection, as quantified by critical energy release rate, are investigated. We further explore the utility of these treatments in creating model tissues whose properties emulate those of ...

The study aimed to compare the effects of different cryopreservation temperatures on mechanical properties and determine optimal temperature for bones in Japanese quail. Bone biomechanical tests are getting more attention but, fresh not always available testing have a limited lifespan. Cryopreservation biological specimens is often needed during tissue preparation testing. In study, tibiotarsi ...

A human cadaveric study using anatomy based muscle loading testing apparatus Oh JH ([email protected]), McGarry MH, Tilan JU, Chen YJ, Chung KC, Lee TQ Department of Orthopedic Surgery, Seoul National University College of Medicine, Seoul, Korea Orthopaedic Biomechanics Laboratory, VA Long Beach Healthcare System and University of California, Irvine [email protected] INTRODUCTION The treatment of ...