OBJECTIVE The aim of this study was to introduce a new method for bilateral distal movement of the entire maxillary posterior segment. CASE REPORT A 17-year-old girl with Class I skeletal malocclusion (end-to-end molar relationships, deviated midline and space deficiency for left maxillary canine) was referred for orthodontic treatment. She did not accept maxillary first premolars extraction....

AIMS anchorage control with self-tapping screws has become an important part of the clinical management of the orthodontic patients. Mechanical resistance and sites of insertion of miniscrews as orthodontic anchorage are critical to ensure successful outcomes. Aim of this clinical study was threefold: 1) to measure the mechanical resistance of the M.A.S., 2) to evaluate if the alveolar areas us...

Objective: To explore the efficacy of an intracorporeal bone grafting technique in the treatment of type A thoracolumbar fracture. Methods: From Feb 2010 to March 2012, a series of 28 patients type A thoracolumbar fracture with moderate to severe osteoporosis who met our inclusion criteria were treated by a combination of percutaneous pedicle screws posteriorly and intracorporeal grafting throu...

STUDY DESIGN Pedicle screw strength or load to failure was biomechanically evaluated, and the geometric characteristics of pedicle screw instrumentation systems were compared. OBJECTIVES To compare the features of pedicle screw systems, and to demonstrate the failure point of the polyaxial pedicle screw head. SUMMARY OF BACKGROUND DATA Many pedicle screw instrumentation systems are currentl...

Effect of mini-screw maximum insertion torque on skeletal orthodontic anchorage. ii To my husband Mike whose has always supported me no matter how ambiguous or flighty my life plans have been. Everyday we spend together makes me a better person. iii ACKNOWLEDGEMENTS I would like to thank my thesis supervisor, Dr. Tom Southard, for all his support and guidance throughout my thesis and education....

Generally, bilateral pedicle screw fixation after Minimal Invasive (MIS) TLIF is accepted as a standard procedure for treating symptomatic spinal pathologies, such as degenerative spinal stenosis, spondylolisthesis, recurrent disc herniation, postlaminectomy instability, and deformity (10). Some authors have recently demonstrated that unilateral pedicle screw fixation is as effective for spinal...

BACKGROUND Reusing orthodontic mini-screws would reduce treatment cost and lead to more use of mini-screws and improvement of orthodontic treatments. This study has assessed the effects of reprocessing and reusing the titanium mini-screws on their maximum insertion, removal and fracture torque (FT). MATERIALS AND METHODS In this experimental study, 20 titanium mini-screws (1.6-mm × 8-mm) were...

conclusions to our knowledge in the literature up to now there are only nine reports of coracoid osteoid osteoma. these cases were treated with different approaches and different techniques. we used en-bloc resection via mini-anterior approach. our patient 30 months after surgery (october 2012) have full range of motion and became pain free since wound healing with normal control imaging.defini...

OBJECTIVE The purpose of this study was to evaluate the safety and efficacy of cervical midline-splitting French-door laminoplasty with a polyether ether ketone (PEEK) plate. The authors retrospectively analyzed the results of patients with cervical laminoplasty miniplate (MAXPACER®) without bone grafts in multilevel cervical stenosis. METHODS Fifteen patients (13 males and 2 females, mean ag...

The aim of this study was to compare the interfragmentary compression generated across a simulated femoral fracture model by a conventional 4.5 mm AO/ASIF cortical lag screw with a differentially pitched cortical compression screw. A 45-degree osteotomy was made in a whole bone composite femoral shaft, this was internally fixed with either a conventional 4.5 mm AO/ASIF cortical lag screw or the...