Fixation of Anteromedial Coronoid Facet Fractures: A Biomechanical Evaluation of Plated Versus Screw Constructs.

Objective: To examine the stability of plate (locking and non-) versus screw constructs in the fixation of these fractures.

Methods: An anteromedial coronoid facet fracture (OTA/AO type 21-B1, O'Driscoll type 2, subtype 3) was simulated in 24 synthetic ulna bones that were then assigned to 3 fracture fixation groups: non-locking plate, locking plate (LP), or screw fixation. Each construct was first cycled in tension (through a simulated medial collateral ligament) and then in compression.

Lateral Elbow Exposures: The Extensor Digitorum Communis Split Compared with the Kocher Approach.

Introduction: In comparison with the frequently used modified Kocher approach, the extensor digitorum communis (EDC) splitting approach allows improved access to the anterior half of the radial head, which is most commonly fractured, while reducing the risk of iatrogenic injury to the lateral collateral ligament.

Step 1 Make The Incision Modified Kocher Approach: Make an oblique 7-cm lateral incision beginning at the proximal edge of the lateral epicondyle and extending distally over the center of the radial head toward the posterior ulnar border of the extensor carpi ulnaris muscle belly.

Step 2 Develop The Interval Between The Anconeus And The Extensor Carpi Ulnaris: Identify and develop the intermuscular interval between the anconeus and the extensor carpi ulnaris.

Functional outcomes of distal humeral fractures managed nonoperatively in medically unwell and lower-demand elderly patients.

Background: There is scant contemporary literature describing the outcomes of nonoperative management of distal humeral fractures. The aim of this study was to report the functional and radiographic outcomes after nonoperative management of distal humeral fractures.

Methods: Between 2007 and 2013, 32 low-demand, medically unwell, or older patients with distal humeral fractures were treated nonoperatively.

Crista Supinatoris Fractures of the Proximal Part of the Ulna: Surgical Technique.

Introduction: Open reduction and internal fixation of crista supinatoris fractures is required when the elbow is unstable despite appropriate nonoperative management and when a patient is undergoing surgical treatment of a periarticular elbow fracture-dislocation.

Step 1 Skin Incision And Surgical Approach: Use a posterior or lateral skin incision according to your preference and then utilize the Kocher interval to access the joint, lateral collateral ligament, and crista supinatoris or, in the setting of a proximal ulnar fracture, use the Boyd interval.

Step 2 Management Of Associated Injuries: Crista supinatoris fractures have not been identified in isolation; address associated injuries such as radial head/neck fractures, capitellar fractures, and coronoid fractures first.

Objective analysis of lateral elbow exposure with the extensor digitorum communis split compared with the Kocher interval.

Background: The most widely used surgical approach to treat radial head fractures is through the Kocher interval. However, the extensor digitorum communis (EDC) splitting approach is thought to allow easier access to the anterior half of the radial head, which is more commonly fractured. The aim of this cadaveric study was to compare the osseous and articular surface areas visible through the EDC split and the Kocher interval.

Do revised hip resurfacing arthroplasties lead to outcomes comparable to those of primary and revised total hip arthroplasties?

Background: A theoretical clinical advantage of hip resurfacing (HR) is the preservation of femoral bone. HR femoral component revision reportedly yields postoperative function comparable to that of primary THA. However, few studies have looked at the outcome of both HR femoral and acetabular side revisions.

Zn2+-catalyzed methanolysis of phosphate triesters: a process for catalytic degradation of the organophosphorus pesticides paraoxon and fenitrothion.

The methanolyses of two neutral phosphorus triesters, paraoxon (1) and fenitrothion (3), were investigated as a function of added Zn(OTf)(2) or Zn(ClO(4))(2) in methanol at 25 degrees C either alone or in the presence of equimolar concentrations of the ligands phenanthroline (4), 2,9-dimethylphenanthroline (5), and 1,5,9-triazacyclododecane (6). The catalysis requires the presence of methoxide, and when studied as a function of added NaOCH(3), the rate constants (k(obs)) for methanolysis of Zn(2+) alone or in the presence of equimolar 4 or 5 maximize at different [(-)OCH(3)]/[Zn(2+)](total) ratios of 0.3, 0.