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At least 181 records · Page 10Linked to original sources
PubMed2003

Prediction of maxillary canine impaction using sectors and angular measurement.

Maxillary canine impaction has an incidence of 1 in 100 in the general population and has been reported as much higher in an individual orthodontic practice. Because patients with canine impactions generally have longer treatment times, depending on the location of the impacted tooth, early identification of impaction is of critical interest to the orthodontist. Sector location and angulation of the unerupted tooth have been analyzed previously as predictors of canine eruption after deciduous extraction. Additionally, sector location has been studied as an indicator of eventual impaction, resulting in good predictive success. In this study, angulation of the unerupted tooth was measured from panoramic radiographs and added to sector location to see whether the combination of these factors could predict impaction more accurately than sector alone. Results verified earlier findings for sector: canines that become impacted will overlap the adjacent lateral incisor in 82% of cases. Logistic regression analysis also determined that once the canine overlaps the midline of the lateral incisor, there is a greater than 0.87 chance of impaction. Sector was found to be the better predictor of impaction, with angulation adding little supplementary predictive value.

Child↗
PubMed2000

Mandibular fracture after third molar removal.

PURPOSE: Mandibular fracture after impacted lower third molar removal is a rare, but major, complication. The factors leading to a mandibular fracture secondary to third molar removal are analyzed retrospectively. PATIENTS AND METHODS: Six patients who suffered from a mandibular fracture as a complication after third molar removal were examined clinically and radiographically. RESULTS: All fractures occurred an average of 14 days postoperatively. The patients were 42 to 50 years old and were all fully dentulous. All grades of tooth impaction were included. CONCLUSIONS: The major risk factor for this complication seems to be advanced age in combination with a full dentition. The degree of tooth impaction is less important. Preexisting bone lesions weaken the mandible and further predispose to a fracture.

Adult↗
PubMed1989

[Long-term observation of two post-treatment cases with an impacted maxillary central incisor corrected by orthodontic treatment].

UNLABELLED: This article describes long-term observation of two post treatment cases with an impacted maxillary central incisor corrected by orthodontic treatment. [Case 1] Age at first examination: 11 years and 1 month. Chief complaint: Retarded eruption of a maxillary right incisor and crowding of teeth. DIAGNOSIS: No skeletal problems were identified. Crown axis inclination of the impacted tooth showed 104.0 degrees. Root axis inclination showed 87.0 degrees. Treatment plan: [formula; see text] extraction, traction of the maxillary right incisor, edgewise method. Treatment time: 4 years and 3 months. [Case 2] Age at first examination: 8 years and 8 months. Chief complaint: Retarded eruption of a maxillary left incisor. DIAGNOSIS: No skeletal problems were identified. Crown axis inclination of the impacted tooth showed 112.0 degrees. Root axis inclination showed 88.0 degrees. Treatment plan: Traction of maxillary left incisor, edgewise method. Treatment time: 5 years and 6 months. The findings were as follows; 1) When the active treatment was finished, no pulp necrosis nor any resorption of root or alveolar bone was found in the two cases. 2) At present, the crown axis inclination is restored to normal in both cases. 3) The impacted maxillary central incisors were treated to the normal position in the dental archs, and the condition and the tissues around are good. The foregoing results, we are sure, can be an important traction of the impacted maxillary central incisor.

Cephalometry↗
PubMed1991

Rare earth magnets and impaction.

Aberration in the eruption process was found to be a prime etiologic factor in inducing impaction. Thus an ideal treatment approach should attempt to mimic the normal eruption modus. However, conventional traction methods have been found to be associated with gingiva inflammation, bone recession, reduced attached gingiva, periodontal pockets, exposed cementoenamel junction, and root resorption of the impacted and adjacent teeth. These side effects are the result of premature exposure of the impacted tooth to the oral cavity through a nonself-cleansing pathway and an uncontrolled force system. The present study introduces a new, magnetic attraction system, with a magnetic bracket bonded to an impacted tooth and an intraoral magnet linked to a Hawley type retainer. Vertical and horizontal magnetic brackets were designed, with the magnetic axis magnetized parallel and perpendicular to the base of the bracket, respectively. The vertical type is used for impacted incisors and canines, and the horizontal magnetic bracket is applied for impacted premolars and molars. A three-dimensional analysis of the magnetic force system, by means of the OMSS apparatus, found the small magnetic bracket combined with a large pole surface area of the intraoral magnet to exhibit the most efficient convergent guidance. For this report the magnetic eruption device was examined on one animal subject and four patients. The Nd2Fe14B magnets were coated with parylene and/or encapsulated in stainless steel housings. In deep impaction, the magnetic bracket was cold-sterilized before surgery, and the surgical mucoperiosteal flap was then sutured over the bonded magnetic bracket. Attraction was initiated 1 to 2 weeks after healing. Thus tooth emergence into the oral cavity replicated normal eruption conditioning. The system operated at an attractive force level of 0.2 to 0.5 N. Adjustment was accomplished by temporarily interposing a magnetic spacer between the two magnetic units. No side effects were observed in this restricted number of treated cases, and treatment time was reduced. The study recommends the application of magnets in the treatment of impaction on the grounds of less invasive surgical procedure, effective attractive forces at short distances, and controlled spatial guidance.

Adolescent↗
PubMed2001

Surgical orthodontic treatment of impacted teeth.

The authors demonstrate their clinical experience in the methodology developed by them for surgical-orthodontic treatment of impacted teeth. The material is based on 34 patients - 21 women and 13 men for the period 1994 - 1997. The patients were treated by the following methodology: after surgical exposure of the impacted tooth a photo-composite devise for tooth-alveolar traction is fixed to the crown part of the tooth by photopolymerization. The methodology is illustrated with a case of a patient treated for an impacted canine tooth.

Humans↗
PubMed2002

Periapical ameloblastoma--a case report.

Ameloblastomas, although often benign, are locally aggressive odontogenic lesions. Presentation of this lesion as a pericoronal radiolucency associated with an impacted tooth is well documented. Presentation of this lesion as a solitary periapical radiolucency associated with a non-impacted tooth however, is rare. Periapical presentation of this lesion may confuse practitioners.

Adult↗