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A temporomandibular joint case with an anterior open bite and a high mandibular plane angle was treated by erupting the posterior teeth after creating a posterior open bite using a Garcia Distraction Appliance and a Garcia Pivot Splint.
1. Periodontitis is a bacterial, plaque-induced disease. 2. Periodontal tissues may be affected simultaneously by inflammatory changes and traumatic changes. 3. Unless a traumatic injury is diagnosed, the occlusion should not be altered as part of the periodontal treatment. There is no place for prophylactic treatment of the occlusion. 4. Occlusal adjustment, occlusal bite splints, orthodontic treatment, and restorative dentistry are all means to treat the occlusion. 5. Occlusal treatment is generally performed after control of the inflammatory periodontal changes by root preparation and oral hygiene. 6. Restorative procedures should be carried out at least one to two months after completion of periodontal surgery. 7. The aim of occlusal therapy should be the establishment and maintenance of stable occlusal relationships and the restoration of an optimal occlusal function.
A compression fracture of the maxilla in a young cat was treated by splinting the maxillary canine teeth. Wire-reinforced composite resin was used to keep these teeth from tipping palatally. This technique stabilized the fracture with anatomic reduction and minimal invasion of the tissues. A mandibular symphyseal separation was also stabilized with a cerclage wire and composite resin bonded wire fixation of the mandibular canine teeth. Two years later, occlusion was normal.
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The aims of this longitudinal, observational study were two-fold: first, to determine in adults with sleep disorders the extent of dental and occlusal changes following the use of a mandibular advancement splint (MAS) and, second, to determine the time course of these changes. One hundred adult subjects (87 males, 13 females) diagnosed with obstructive sleep apnoea (OSA) and/or asymptomatic snoring were treated with non-adjustable MAS. At the outset each subject was randomly assigned to a group and reviewed 6, 12, 18, 24 or 30 months after placement of a splint. There were 20 subjects in each group. Craniofacial changes were measured on lateral cephalometric radiographs taken at the initial and review appointments. When the changes in all subjects were examined, the SNA, ANB angles, ANS-PNS length and face height increased, and the mandibular first molars and the maxillary first premolars significantly overerupted. Significant retroclination of the maxillary incisors and proclination of the mandibular incisors were accompanied by reductions in maxillary arch length, overbite and overjet. When the changes over time were determined, the mandibular symphysis was significantly lower at all review periods. An increase in face height and reductions in overbite and overjet were evident at 6 months, and over-eruption of the maxillary first premolars and mandibular first molars, and proclination of the lower incisors were found at 24 months. Significant positive correlations were also found between the amount of anterior opening by the appliances and changes in overbite at 24 and 30 months. The appliance used produced small, unpredictable changes in the occlusion that tended to occur after 24 months' wear. It is postulated that the changes in overbite might be lessened by keeping the bite opening to a minimum.
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This article reports treatment for a 21-year 11-month old female patient with severe osteoarthrosis of the TMJ with a special reference to adaptive changes of the condyle during the treatment. She had severe open bite with a Class II molar relationship; she had limited mouth opening, TMJ sounds, pain, and tinnitus. Lateral tomograms showed flattening and deep erosion on the left condyle, and an MRI revealed anterior disk displacement without reduction. By manipulation and splint therapy, TMJ pain and tinnitus were eliminated, then orthodontic treatment was initiated, maintaining the splint-induced position of the condyles. After 2 years of orthodontic treatment with a multibracket appliance, an acceptable occlusion was achieved with a Class I molar relationship. On lateral tomograms after treatment, bony deformation of the left condyle disappeared and adaptive remodeling was recognized with a uniform joint space in the left TMJ. However, repositioning of the disk was not achieved. Adaptive changes or functional remodeling experienced in this patient may be due to stable occlusion, uniform joint space, and the consequent biomechanical equilibrium in the TMJ.
The aim of the investigation was to evaluate the status and function of the temporomandibular joint (TMJ) and masticatory system in patients with habitual snoring and obstructive apnoea after 2 years nocturnal treatment with a mandibular advancement splint. Thirty-two patients participated in the study, ranging from 43.0 to 79.8 years of age (mean 54.4 years, SD 8.78) at the start of treatment. All patients had been referred from the ENT department for treatment with a mandibular advancement splint. The acrylic splint advanced the mandible 50-70 per cent of maximal protrusion, opened 5 mm vertically, and was used 6-8 hours per night and 5-7 nights per week. Overjet, overbite, and molar relationship were measured on dental casts. The patients were asked to answer a questionnaire concerning symptoms of craniomandibular dysfunction (CMD). They were also clinically examined in a standardized manner, including registration of range of mandibular movements, TMJ sounds, pain on movement, and palpatory tenderness of the TMJ and the masticatory muscles. None of the patients showed more than five symptoms of dysfunction either at the start of or after 2 years of treatment. A decrease in the frequency of headache was found for nine of those 18 patients that reported headache (P = 0.004). A minor, but significant decrease in overjet and overbite was found and the molar relationship was also changed. It was concluded that 2 years' treatment with a mandibular advancement splint had no adverse effects on the craniomandibular status and function, but the observed occlusal changes requires further evaluation.
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