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At least 991 records · Page 55Linked to original sources
PubMed1993

Molar and incisor changes with Wilson rapid molar distalization.

The purpose of this study was to determine the magnitude and direction of maxillary and mandibular first molar and incisor changes that occur during Class II molar correction with Wilson "rapid molar distalization." Nineteen patients (13 females, 6 males) were selected from the clinic at Loma Linda University Department of Orthodontics. All patients received maxillary bimetric distalizing arches (BDA), and either a mandibular three-dimensional lingual arch, with or without a passive 0.016 x 0.016-inch utility arch, or a traditional edgewise full banded and bonded arch. The arches were activated with open coil spring and Class II intermaxillary elastics. A total of five activations were completed or until visual inspection revealed a Class I molar relation. Prestudy and poststudy lateral cephalometric radiographs were taken with molar bands cemented. Dental changes were determined, with Ricketts superimpositions. The mean change in molar relation measured at the occlusal plane was 4.1 mm. The mean maxillary molar distalization was 2.16 mm, with 7.8 degrees of tip. The rate of maxillary molar movement was 0.56 mm per month. The mean mandibular molar mesial movement was 1.38 mm. The maxillary incisors protruded a mean of 0.3 mm, and extruded a mean of 1.6 mm. Except for the edgewise sample, all mandibular molars moved mesially further than the incisors, reducing the mandibular arch length. The presence of erupted maxillary second molars did not correlate with the rate of maxillary first molar movement, magnitude of movement, or amount of tipping that occurred.

Adolescent↗
PubMed1998

Prosthetic restorations with osseointegrated implants after bone grafts to correct large jaw defects caused by extraction of multi-impacted teeth: a case report.

A case is reported of a 21-year-old Japanese man examined for unerupted molar teeth on the left side of both jaws. Intraoral examination revealed edentulous regions from the second premolar to the molar, with moderate atrophy of the upper alveolar ridge. A panoramic X-ray revealed eight impacted teeth. The impacted mandibular teeth were extracted through decortication and bone replacement. The impacted maxillary teeth were extracted following reflection of a mucoperiosteal flap. The large defects caused by the extractions in both jaws were filled with autogenous cancellous marrow and bone chips. Eleven months later, in the first stage of the Branemark implant procedure, fixtures were placed in the edentulous regions of both jaws, with simultaneous additional corticocancellous block onlay bone grafting in the maxilla to correct slight resorption. After another seven months, second-stage abutment surgery was performed. Occlusion was then restored through a prosthetic procedure. Next, orthodontic treatment was commenced, using the implant supported teeth as an anchor. Despite the slight resorption in the maxilla, implantation was successful and occlusion was restored in the previously edentulous regions. This suggests that application of a simultaneous corticocancellous block onlay bone graft is a valuable basis for implant procedures in the maxilla.

Adult↗
PubMed1997

The correction of Class II, division 1 malocclusion with bionator headgear combination appliance.

The purpose of this study was to evaluate skeletal and dental effects of bionator headgear combination appliances on patients in development period with Class II, division 1 malocclusion. The comparison of computerized X-ray cephalometric measurements between the 26 treated children and 26 untreated children was made. The results showed that ANB angle was significantly reduced and horizontal mandibular growth development tended to be normal in the treated group. It was suggested that the bionator headgear combination appliance can restrain the maxillary growth early and promote the forward mandibular growth which contribute the functional jaws correction.

Activator Appliances↗