Abstract Purpose Biomechanical comparison of wedge and biconcave deformity different height restoration after augmentation osteoporotic vertebral compression fractures was analyzed by three-dimensional finite element analysis (FEA). Methods Three-dimensional model (FEM) T11-L2 segment constructed from CT scan elderly osteoporosis patient. The von Mises stresses vertebrae, intervertebral disc, f...

The crack growth resistance of human dentin was characterized as a function of relative distance from the DEJ and the corresponding microstructure. Compact tension specimens were prepared from the coronal dentin of caries-free 3rd molars. The specimens were sectioned from either the outer, middle or inner dentin. Stable crack extension was achieved under Mode I quasi-static loading, with the cr...

 Abstract  Background: The goal of this report is to show our results with extension block technique for treatment of mallet fracture. The indications for this technique were the presence of a large bone fragment, and palmar subluxation.  Methods: We retrospectively assessed the results of treatment in 14 mallet fractures  which have been treated by extension block technique to determine the ra...

In this paper, the fatigue and fracture properties of bovine dentin are evaluated using in vitro experimental analyses. Double cantilever beam (DCB) specimens were prepared from bovine maxillary molars and subjected to zeroto-tension cyclic loads. The fatigue crack growth rate was evaluated as a function of the dentin tubule orientation using the Paris law. Wedge-loaded DCB specimens were also ...

conclusions pedicled pibf is a new option for treating distal radius fracture non:union:. the results are predictable in achieving :union: and good function, and this technique can be successfully used in cases with extensive soft-tissue damage or infection. background non:union: of distal radius fractures is disabling. treatment is difficult and the results are not predictable. however, poster...

In most cases it is an advantage to provide means of skeletal traction before attacking the fracture-site. Femur. 1. Thomas splint. Kirschner wire extension via tibial crest. 2. Brauns splint and skeletal traction. 3. Sliding-bed traction. Tibia and fibula. 1. Watson Jones apparatus. 2. Thomas splint and flexion-piece, with Kirschner wire extension via os calcis. 3. Brauns splint and skeletal t...

We find that, in contrast to most viscoelastic polymers previously studied, the intrinsic fracture toughness of vitrimer strongly depends on loading rate while its bulk dissipation associated with crack extension has weak rate-dependence.

Intraarticular coronal fracture of the femoral condyle is rare, and an isolated medial Hoffa fracture in a child is extremely rare. To our knowledge, such a case has not yet been reported in the literature. Early diagnosis and prompt treatment are essential for a good long-term outcome. We report a case of 12-year-old male who suffered a traffic accident and sustained an isolated medial Hoffa f...

Proximal interphalangeal (PIP) joint injuries remain challenging to hand surgeons [1]. Painless, stable and mobile PIP joint are the main goals for any treatment option of PIP joint [2,3]. Closed reduction and extension block pins [1,2] Open reduction of PIP joint fractures [3,4] and osteochondral hemihamate autograft arthroplasty [5,6] described for treatment of such difficult injuries. Mainte...

This biomechanical study is the first to compare 3 fixation methods-bilateral fixed-angle plate, modified anterior tension wiring, and cannulated lag screws with anterior tension wiring-in multifragmentary distal patella fractures. A T-shaped 3-part fracture simulating a multifragmentary articular distal patella fracture (AO/OTA 34-C2.2) was created in 18 human cadaver knee specimens. Three gro...