OBJECTIVE The objective of this study was to assess the primary stability of different orthodontic mini-implants inserted into different maxillary and mandibular regions of swine. MATERIAL AND METHODS One hundred eighty orthodontic mini-implants produced by 5 different manufacturers, all presenting several shapes, were divided into 5 groups: Mondeal (M), Neodent (N), SIN (S), INP, and Titaniu...

Damage to the medial meniscus root, for example by a complete radial tear, destroys the ability of the knee to withstand hoop strain, resulting in contact pressure increases and kinematic alterations. For these reasons, several techniques have been developed to repair the medial meniscus posterior root tear (MMPRT), many of which have shown complete healing of the repaired MMPRT. However, effor...

Polymethyl methacrylate (PMMA)-augmented cannulated pedicle-screw fixation has been routinely performed for the surgical treatment of lumbar degenerative diseases. Despite its satisfactory clinical outcomes and prevalence, problems and complications associated with high-strength, stiff, and nondegradable PMMA have largely hindered the long-term efficacy and safety of pedicle-screw fixation in o...

Stone has over millennia been used for structures which naturally develop compression under gravity loads. This study focuses on segmental stone beams with artificially induced compression. Prototype specimens were fabricated using epoxy adhesive longitudinal shear transfer between prestressed steel strands and pre-cut Valange limestone blocks mortar inter-block joints. Each specimen was by a s...

PURPOSE Our purpose was to compare 3 commonly used suture anchor configurations for repair of type II SLAP lesions. METHODS Biomechanical testing was performed on 3 groups of 7 cadaveric shoulders by use of an optical linear strain measurement system. Standardized type II SLAP lesions were created and repaired via 3 suture anchor configurations: (1) a single simple suture anterior to the bice...

Introduction: Approximately 15 to 20 percent of all proximal humeral fractures are displaced and require operative treatment [1]. Reduced bone quality of the humeral head complicates internal fixation and may result in implant loosening, fracture re-displacement and poor functional outcome for the patient [2, 3]. Little is known about the effect of bone mineral density (BMD) on internal fixatio...

AIM To improve the strength of stabilization systems currently used in osteoporotic spinal fractures, essentially by increasing the fixation force of pedicle screws. MATERIAL AND METHODS Six human cadaveric vertebrae were used. Bone mineral densities of the specimens were measured with Dual Energy X-ray Absorptiometry in order to assess the osteoporosis. All vertebrae were found to be severel...