BACKGROUND The Lapidus bunionectomy is a popular procedure for severe bunion deformity where metatarsus primus varus is equal to or exceeds 15 degrees. We evaluated a new locking compression plate which may improve outcomes with the Lapidus procedure. METHODS Ten matched pairs of cadaver feet were used to compare the standard crossed 4.0-mm compression screw method of fixation to the LPS Lapi...

ABSTRACT BACKGROUND Minimally invasive internal fixation is also called "biological internal fixation". This concept is used widely in the treatment of various fractures but to date, there have been no report about such application in the repair of isolated ulnar bone fractures. METHODS Eleven patients with fracture of isolated ulnar bone (four AO type 22A11 and seven AO type 22A12), mean ...

BACKGROUND The treatment of displaced proximal humerus fractures, especially in elderly, remains controversial. The objective of this study was to evaluate functional outcome of locking plate used for fixation of these fractures after open reduction. We also attempted to evaluate the complications and predictors of loss of fixation for such an implant. METHODS Over two and a half years, 56 pa...

BACKGROUND There are many techniques that are used for limb lengthening. Lengthening a limb over a plate is an alternative choice used in children or when using an intramedullary nail is difficult. OBJECTIVES In this study, we presented a new technique for tibial lengthening using a monolateral external fixator over a lengthening plate. MATERIALS AND METHODS For tibial lengthening, a monola...

OBJECTIVES The aim of this study was to compare the mechanical resistance of four different osteosyntheses modeled in two different sagittal split ramus osteotomy (SSRO) designs and to determine the linear loading in a universal testing machine. MATERIALS AND METHODS An in vitro experiment was conducted with 40 polyurethane hemimandibles. The samples were divided into two groups based on oste...

We describe a minimally invasive procedure for removal of a distal femur locking plate using arthroscopic assistance. Using lateral accessory portals, we performed arthroscopically-assisted removal of distal locking screws. Under fluoroscopic image, proximal screws were removed from the diaphysis. The accessory lateral portal sites used to remove the distal screws were connected. Through this a...

In this paper, we propose two lower order nonconforming rectangular elements for the Reissner-Mindlin plate. The first one uses the conforming bilinear element to approximate both components of the rotation, and the modified nonconforming rotated Q1 element to approximate the displacement, whereas the second one uses the modified nonconforming rotated Q1 element to approximate both the rotation...

BACKGROUND AND PURPOSE Historically, the treatment of periprosthetic femoral fractures (PFFs) has been associated with a high frequency of complications and reoperations. The preferred treatment is internal fixation, a revision of the femoral stem, or a combination of both. An improved understanding of plate use during internal fixation, and the introduction of locking-plate osteosynthesis may ...

OBJECTIVES The purposes of this study were to evaluate the cantilevered bending strength and failure modes of locking screws inserted at various angles in a plate with fully circumferential threaded holes. As an additional measure, the amount of screw head prominence at these angles was also assessed. METHODS Standard 3.5-mm locking screws were inserted into round fully circumferential thread...

The proximal humerus internal locking system is an internal fixation device consisting of a low-profile plate and locking screws, which is used for the fixation of three- and four-part fractures of the proximal humerus. We describe a case in which the screws cut out of the humeral head causing injury to the axillary artery necessitating urgent removal of the implant.