The MRI revealed progressive oedema in the fracture (figure 4A,B). Consequently, it was decided to perform an acute percutaneous internal compression fixation of the fracture by means of an Acutrak screw (figure 5). Since there was a progression of oedema along the fracture line—without real fracture diastasis—the authors chose a single compression screw fixation as the definitive treatment. Po...

269 INTRODUCTION Ophthalmomyiasis refers to infestation of the eye by dipterous fly larvae such as Chrysomyia bezziana. Chrysomyia bezziana is also known as old world screw worm; it is an obligatory parasite of the wound and found mostly in tropical and subtropical areas of the world. The sequelae of ophthalmomyiasis may range from minor irritation to blindness and even death. Treatment of opht...

A 33-year-old man presented for follow up radiographs of the lower leg revealing dense material in the soft tissues of the ankle. These could be traced to a track in the adjacent tibia created by removal of an intramedullary nail and locking screws. This too contained dense bone graft material. The graft had migrated from the locking screw holes in the proximal tibia which had been filled appro...

PURPOSE To assess an alternative technique for the treatment of midshaft non-unions of the clavicle. METHODS Five patients with symptomatic non-unions of the clavicle were treated with open reduction and intramedullary fixation by using a Herbert cannulated bone screw. Autogenous bone grafting was applied in one case and decortication in the other 4 cases. RESULTS Review of the clinical and...

The purpose of this study was to histomorphometrically evaluate the bone-to-implant contact and bone area around a titanium implant retrieved from a human lower jaw. A screw-shaped titanium implant (sandblasted and acid-etched surface) was removed from a 68-year-old male after having been in function for 40 months because of a fracture of the abutment screw. Following the implant removal, an un...

background: primary stability is an important factor for the clinical success of orthodontic mini-screws. the present study made an attempt to evaluate the effect of insertion angle changes on the maximum insertion and removal torque of orthodontic mini-screws. materials and methods: in this experimental study, 72 mini-screws (dual top anchor system, jeil, 1.6 mm diameter, 8 mm length) were use...

introduction: some clinicians use a handheld screw driver instead of a torque wrench to definitively tighten abutment screws. the aim of this study was to compare the removal torque of one-piece and two-piece abutments tightened with a handheld driver and a torque control ratchet. methods: 40 iti implants were placed in acrylic blocks and divided into 4 groups. in groups one and two, 10 iti one...

an ultra-glide twin screw extruder is employed to allow the quick and easy removal of the screws from the fixed processing section within few seconds, probing the current degree of the melting state, the dispersive anddistributive processing steps and finally the level of morphology development along extruder screws. for morphological studies the molten samples, collected from different points ...

The utility model relates to a conveying device for processing metal accessories with vibration type chip removal, which comprises an outer frame body, roller, support plate, belt and sprocket mechanism. left right sides of the bottom surface body are fixed sleeve, internal screw sleeve is installed second return spring, top spring rod, rod inner In addition, ends main internally connected side...