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In recent years close consideration of the biomechanical principles of treatment of mandibular fractures has led to the use of operative as well as conservative methods. Since this combined method of treatment appeared cumbersome, a new kind of osteosynthesis plate was developed for functionally stable internal fixation of mandibular fractures, without the(More)
Various methods have been advocated for the treatment of fractures of the angle of the mandible, emphasizing the complexity of the problem. A functionally stable osteosynthesis can be achieved in such fractures with a solitary lag screw. This technique meets the principles of rigid internal fixation and achieves maximum stability with a minimum of implant(More)
Osteosynthesis with lag screws is an essential supplement to osteosynthesis with mental plates. It is especially suitable in association with a neutralization plate for stabilization of short lamellar fractures. Wide lamellar fractures can be functionally stabilized with two or, in rare cases, three screws.
Since the early 1990s, there have been continuous improvements in the software available for planning orthognathic surgery. This study investigates the precision of profile prediction by version 1.51 of the Dentofacial Planner (DFP). Orthognathic operations in 40 patients with different types of dysgnathia were evaluated. The preoperative and postoperative(More)
Functional and esthetic dysgnathia surgery requires accurate planning and precise surgical technique. Programs that simulate such surgery have thus become increasingly important. These are useless, however, when there is no technique for reproduction of surgical planning in the patient. This can be mediated by a surgical model. The present study(More)
The treatment of fractures and osteotomies of the mandible and the midface show very different problems. The mandible must be treated in a stable and the midface in a static way. Due to the different bio-mechanics and topography of these bony structures, the advantages and disadvantages of treating a fracture in the maxillo-facial-region by the means of(More)
Mechanical properties of blood clots stabilized with collagen (Pentapharm) and a gelatine (Gelastypt-M) sponge were compared with the help of thrombelastography and volumetric tests. The collagen songe was distinctly inferior to gelatine in stabilizing the clot against retraction. It appears that gelatine is a better material for filling large osseous(More)
The use of collagen as a bone substitute was examined in a clinical study involving 70 patients. In a standardized operation impacted mandibular third molars were removed simultaneously. Collagen fleece was implanted in one osseous defect while the other defect was packed with iodoform gauze. Postoperative pain, swelling and complications were analyzed.(More)