Eckhoff, Donald G. MD, MS; Bach, Joel M. PHD; Spitzer, Victor Reinig, Karl D. Bagur, Michelle BS; Baldini, Todd H. Flannery, Nicolas M.P. BS Author Information

Eckhoff, Donald G. MD, MS; Bach, Joel M. PhD; Spitzer, Victor Reinig, Karl D. Bagur, Michelle BS; Baldini, Todd H. Rubinstein, David MD; Humphries, Stephen MS Author Information

Background: Arthroscopic shoulder capsuloligamentous repair can be performed in the beach-chair (BC) or lateral decubitus (LD) position. Patient positioning may influence anchor placement. Limited research exists evaluating these 2 techniques, specifically with respect to position and trajectory. Purpose/Hypothesis: The purpose of this study was perform a cadaveric imaging analysis arthroscopic anterior stabilization LD BC positions. It hypothesized that repairs would demonstrate more...

Background: Acute inversion ankle sprains are among the most common musculoskeletal injuries. Higher grade sprains, including anterior talofibular ligament (ATFL) and calcaneofibular (CFL) injury, can be particularly challenging. The precise effect of CFL injury on instability is unclear. Hypothesis: will result in decreased stiffness, peak torque, increased talar calcaneal motion alter contact mechanics when compared with uninjured ATFL-only injured a cadaveric model. Study Design:...

Background: Liquid gentamicin is approved by the Food and Drug Administration, readily available, much less costly than tobramycin, more commonly used antibiotic in cement spacers. The purpose of present study was to test mechanical properties, elution characteristics, antibacterial activity liquid an acrylic bone spacer. Methods: Standardized specimens consisting Palacos combined with gentamicin, powdered or no were fashioned, three groups tested regard compressive tensile strength,...

Several new arthroscopic suture materials are available. It is important for surgeons to know which suture-knot combination provides the strongest construct.The newer, polyblend sutures have dissimilar load-to-failure characteristics.Controlled laboratory study.The load failure of 4 knots was evaluated (surgeon's, Duncan loop, Samsung Medical Center [SMC], and Roeder) using 5 No. 2 (Ethibond, Ticron, FiberWire, ForceFiber, MaxBraid). One surgeon tied all knots. Fifteen samples were tested...

Whole bone strength can be partitioned into structural and material components. In three-point bending tests of 6-month-old female humeri from the HcB/Dem recombinant congenic series, strains HcB/8 HcB/23 differed markedly in calculated failure stress but not ash percentage. Fourier transform infrared spectroscopic imaging was used to determine whether differences ratio pyridinoline (pyr; nonreducible) dehydrodihydroxynorleucine (de-DHLNL; reducible) collagen cross-links (XLR), mineral...

In Brief Study Design. Fresh frozen human cadaver specimens were used to perform a biomechanical assessment focusing on spinal-pelvic fixation. Unit rod fixation alone was compared with that of unit supplemented L5 pedicle screws. Objectives. To investigate the effects adding screw construct. Summary Background Data. The treatment neuromuscular scoliosis associated pelvic obliquity continues evolve. Spinal fusion using extending from thoracic spine pelvis segmental instrumentation has become...

Conventional screws used for fracture fixation in orthopedic surgery continue to rely on the historic buttress thread design. While generally provide solid resistance against unidirectional axial loading forces, their design suffers from several limitations, as does not adequately resist multiaxial forces. Furthermore, screw is prone stripping at bone-screw interface and can cause microfracturing of surrounding bone due its Standard are therefore risk adverse postoperative outcomes secondary...

Anterior cruciate ligament reconstruction with hamstring tendon graft and interference screw fixation has recently been considered. Concerns for the use of screws soft tissue grafts include damage to during insertion, decreased strength, a decrease in bone-tendon contact area healing within tunnel when is placed an eccentric position. This last concern could be addressed by placing centrally between four limbs graft. The purpose this study was determine mode failure, pullout force, slippage...

Medial compartment knee osteoarthritis is a painful and debilitating disease. A proximal fibular osteotomy novel, simple surgical technique that may reduce pain improve function for patients with osteoarthritis. The purpose of this biomechanical cadaver study was to determine what effect had on joint ankle pressures tibia strain. Ten matched pairs legs were tested in compression 1.1 times body weight comparing intact at 0°, 15°, 30° flexion. Sensors inserted into the measure pressure, force,...

The current study compared tunnel diameter as an independent risk factor for fixation failure from the coracoid after transcoracoid coracoclavicular reconstruction. effect of variation in size and scapular bone density on was also studied. Sixty-two cadaveric scapulae were randomized into 1 4 groups: a control group with no hole, 4-mm tunnel, 6-mm socket technique using hole superiorly inferiorly. Bone measures all specimens performed. Coracoid dimensions quantified. Using cortical button...

Abstract Fracture susceptibility depends jointly on bone mineral content (BMC), gross anatomy, and microarchitecture quality. Overall, it has been estimated that 50-70% of strength is determined genetically. Because the difficulty performing studies genetics in humans, we have used HcB/Dem series recombinant congenic (RC) mice to investigate this phenotype. We performed a comprehensive phenotypic analysis strains including morphological long bones, measurement ash percentage, biomechanical...

The purpose of this study was to compare the biomechanical properties four volar fixed-angle fracture fixation plate designs in a novel sawbones model as well cadavers. Four fixed angle plating systems (Hand Innovations DVR-A, Avanta SCS/V, Wright Medical Lo-Con VLS, and Synthes stainless locking) were tested on models using an osteotomy gap simulate distal radius fracture. Based power analysis, six plates from each system failure axial compression. To loads with physiologic wrist motion,...

In Brief Study Design. Biomechanical and radiographical study. Objective. To test the hypothesis that stiffness strength at discrete sites of human lumbar vertebrae depend on 3-dimentional structure density vertebral-body bone elements, can be evaluated using models based vertebral characteristics obtained from quantitative computed tomogrphy. Summary Background Data. We have not found published methods allow in vivo evaluation mechanical properties body applicable for clinical use....

Higher rates of poor outcomes in displaced midshaft clavicle fractures treated nonoperatively have recently been reported. Along with expanding indications for operative fixation and increasing application locked plate constructs, it is unknown whether complications related to bicortical penetration the can be avoided using unicortical fixation. The purpose this study compare biomechanical properties precontoured vs manually contoured locking plates. Forty-eight Sawbone composite human...