Traumatic Cervical Facet Fractures and Dislocations.

Cervical facet injuries, though less common than other spinal injuries, represent a subset of subaxial cervical spine injuries and can present significant challenges in terms of diagnosis, management, and outcomes. A major concern with cervical facet fracture is identifying instability patterns that may necessitate surgical stabilization. Particularly in cases of cervical facet fracture dislocations, there remains controversy regarding requirements for closed reduction, timing, surgical approach, need for preoperative MRI, and method of fixation.

Prognostic Factors Impacting Surgical Outcomes in Patients With Cervical Spondylotic Myelopathy.

The purpose of surgical decompression in patients who have CSM is to stop the progression of symptoms and hopefully improve function. It is critical to understand prognostic factors that affect the outcome. Factors intrinsic to the patient that can adversely affect outcomes include diabetes, older age, tobacco use, the presence of mental health disease, and obesity.

Quantitative Assessment of the Anatomical Footprint of the C1 Pedicle Relative to the Lateral Mass: A Guide for C1 Lateral Mass Fixation.

Study Design: Anatomic study.

Objectives: To determine the relationship of the anatomical footprint of the C1 pedicle relative to the lateral mass (LM).

Methods: Anatomic measurements were made on fresh frozen human cadaveric C1 specimens: pedicle width/height, LM width/height (minimum/maximum), LM depth, distance between LM's medial aspect and pedicle's medial border, distance between LM's lateral aspect to pedicle's lateral border, distance between pedicle's inferior aspect and LM's inferior border, distance between arch's midline and pedicle's medial border.

Comparison of fatigue strength of C2 pedicle screws, C2 pars screws, and a hybrid construct in C1-C2 fixation.

Study Design: A biomechanical study comparing the fatigue strength of different types of C2 fixation in a C1-C2 construct.

Objective: To determine the pullout strength of a C2 pedicle screw and C2 pars screw after cyclical testing and differentiate differences in stiffness pre- and post-cyclical loading of 3 different C1-C2 fixations.

Summary Of Background Data: Some surgeons use a short C2 pars screw in a C1-C2 construct, because it is less technically demanding and/or when the vertebral artery is high riding.

Correlation of posterior ligamentous complex injury and neurological injury to loss of vertebral body height, kyphosis, and canal compromise.

Study Design: Retrospective, case-control study.

Objective: The purpose of this study was to determine if thoracolumbar vertebral body collapse, translation, or canal compromise (CC) is associated with injury to the posterior ligamentous complex (PLC) or neurological elements.

Summary Of Background Data: Radiographical parameters, including loss of vertebral body height (LOVBH), vertebral body translation, local kyphosis (LK), and CC, are often used as indicators of spinal instability.

An anatomical study of the mid-lateral pars relative to the pedicle footprint in the lower lumbar spine.

Study Design: An anatomic study that describes the relationship of the pedicle center to the mid-lateral pars (MLP) in the lower lumbar spine as a guide to pedicle screw placement.

Objective: Describe morphometric data of the lower lumbar pedicles, the unique coronal pedicle footprints of L4 and L5, and their impact on the relationship of the pedicle center to the MLP.

Summary Of Background Data: Traditional medial-lateral starting points for lumbar pedicle screws use the facet as an anatomic reference for all lumbar levels.

An anatomic and radiographic study of lumbar facets relevant to percutaneous transfacet fixation.

Study Design: An anatomic study of lumbar facet anatomy for transfacet fixation.

Objective: Describe the ideal starting point and trajectory for percutaneous transfacet fixation.

Summary Of Background Data: Percutaneous transfacet fixation is gaining popularity for posterior stabilization after anterior lumbar interbody fusion.

Basicervical versus intertrochanteric fractures: an analysis of radiographic and functional outcomes.

This retrospective study compared the long-term stability and functional outcomes of basicervical versus intertrochanteric fractures, and evaluated the use of an additional derotational screw in the treatment of basicervical fractures. Sixty-six patients (28 with basicervical fractures and 38 treated for stable and unstable intertrochanteric fractures) were identified. All intertrochanteric fractures were treated with a sliding hip screw.

Vitallium radial head prosthesis for acute and chronic elbow fractures and fracture-dislocations involving the radial head.

This retrospective study aims to evaluate the radiographic, functional, and patient-derived outcomes of 16 patients who each received a Vitallium radial head prosthesis for unreconstructable acute fractures of the radial head, as well as previously treated fractures of the radial head associated with residual instability, pain, and stiffness. Follow-up averaged 33 months. A trend toward greater disability and poorer motion was noted in the delayed treatment group compared with the acute replacement group.

A device for zone-II flexor tendon repair. Surgical technique.

Background: The stainless-steel Teno Fix tendon-repair device has improved biomechanical characteristics compared with those of suture repair, and it was well tolerated in a canine model. The purpose of this study was to compare the Teno Fix with suture repair in a clinical setting.

Methods: Sixty-seven patients with isolated zone-II flexor tendon injury were randomized to be treated with a Teno Fix or a four-stranded cruciate suture repair.

A 15- to 25- year follow-up study of primary Charnley low-friction arthroplasty: a single surgeon series.

Long term outcome studies are essential to determine the effectiveness and durability of a procedure. We report our 15 to 25 year clinical and radiographic follow-up with the Charnley low-friction hip arthroplasty. Four hundred and forty-seven primary Charnley hip arthroplasties were performed by a single surgeon.

Device for zone-II flexor tendon repair. A multicenter, randomized, blinded, clinical trial.

Background: The stainless-steel Teno Fix tendon-repair device has improved biomechanical characteristics compared with those of suture repair, and it was well tolerated in a canine model. The purpose of this study was to compare the Teno Fix with suture repair in a clinical setting.

Methods: Sixty-seven patients with isolated zone-II flexor tendon injury were randomized to be treated with a Teno Fix or a four-stranded cruciate suture repair.

The effects of implant composition on extensor tenosynovitis in a canine distal radius fracture model.

Purpose: Dorsal plating of distal radius fractures with titanium plates has resulted in clinically observed tenosynovitis and tendon rupture. The goal of this study was to investigate whether titanium-based implants result in more extensor tendon inflammation than matched stainless-steel implants in a canine fracture model.

Methods: An osteotomy was created in the distal radius of 18 beagles and fixed with 2.

The biomechanical analysis of a tendon fixation device for flexor tendon repair.

Purpose: Stainless steel suture is high in tensile strength but is not widely used in flexor tendon repair because of difficulty with handling and knot tying. The purpose of this study was to examine the biomechanical characteristics of the single-strand multifilament stainless steel Teno Fix device (Ortheon Medical, Winter Park, FL) designed for zone II flexor digitorum profundus (FDP) tendon repair.

Methods: Sixty cadaveric flexor tendons were transected and randomized to receive a Teno Fix or 4-stranded (3-0 or 4-0 braided polyester) suture repair; all repairs were tested with and without a 5-0 monofilament polypropylene circumferential epitendinous suture.

Height and lower extremity length as predictors of hip fracture: results of the NHANES I Epidemiologic Follow-up Study.

Unlabelled: The relationship between height, lower extremity length (LEL), and hip fracture was examined in 4264 women followed for 22 years. Greater height predicted fracture among younger women, whereas LEL predicted risk for all ages. LEL is a better predictor of hip fracture risk than height among older women.

Influence of demographic and technical variables on the incidence of osteolysis in Charnley primary low-friction hip arthroplasty.

The influence of demographic and technical variables on the incidence of osteolysis in Charnley primary low-friction arthroplasty was investigated. Demographic variables included age, gender, diagnosis, and Charnley joint class. Technical variables included the design of acetabular and femoral components, subchondral plate retention versus removal, and cementing techniques.