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At least 1,045 records · Page 58Linked to original sources
PubMed1996

Ultrasonic root-end preparation: clinical and radiographic evaluation of results.

PURPOSE: This study evaluated the results of periradicular surgery performed using ultrasonic root-end preparation. PATIENTS AND METHODS: The course of healing during observation periods ranging from 6 months to 3 years was examined in 157 teeth. RESULTS: One hundred forty-five teeth were successfully treated, for a success rate of 92.4%. CONCLUSION: It was concluded that the ultrasonic root-end preparation technique for periradicular surgery is a simple procedure that provides excellent results.

Adolescent↗
PubMed1998

Periodontal disease associated with interdental osteotomies after orthognathic surgery.

PURPOSE: One of the main reasons for orthodontics and orthognathic surgery is the prevention of dental loss caused by periodontal disease. Until now there have been no published data describing the periodontal situation near interdental osteotomies after orthognatic surgery. The purpose of this study was to evaluate this situation. PATIENTS AND METHODS: Thirty patients with Class II malocclusions were studied 4 to 10 years after segmental orthognathic surgery, analyzing the periodontal condition near osteotomies with the aid of periapical and panoramic radiographs. RESULTS: Fifty-one pathologic periodontal lesions were found in the 74 segmental osteotomy sites. There were 35 segmental areas with osseous periodontal defects and 16 segmental areas with missing teeth. CONCLUSION: A high incidence of dental and periodontal trauma occurs in the region of segmental osteotomies after orthognathic surgery.

Adult↗
PubMed1977

Periapical condition of anterior teeth after surgical correction of mandibular prognathism. A radiographic study.

Extrusion and root resorption of the mandibular anterior teeth have been reported after surgical correction of mandibular prognathism by horizontal osteotomy of the rami. The aim of the present study was to find out whether oblique sliding osteotomy also has such side effects. Intraoral radiographs of the maxillary and mandibular anterior teeth of 61 patients were studied. Enlargement of the periodontal space and signs of root resorption were estimated postoperatively and at a later review 1 1/2-5 years after the operation. Enlargement of periodontal space occurred postoperatively in 16.2% of the maxillary incisors and 52.2% of the mandibular incisors. The enlargements were mostly reversible and at the final review only 1.1 and 8.5% of the maxillary and mandibular incisors, respectively, showed such enlargements. Root resorption was rarely found in radiographs from the postoperative control. At the final review, however, there were signs of root resorption of 1.6 and 20.8% of the maxillary and mandibular incisors, respectively. It appears warranted to conclude that the anterior teeth, especially the mandibular incisors, are exposed to strong forces also after oblique sliding osteotomy of the mandibular rami.

Adolescent↗
PubMed1978

Central neurilemmoma of the jaws. Review of literature and case report.

Neurilemmomas presenting as primary central bone tumors are extremely rare. Only 21 cases have been reported to have arisen in the jaws; all except for one have occurred in the mandible. The majority of these have been associated with the inferior dental nerve. A case of a central neurilemmoma arising in the anterior mandible is reported. Its probable origin is from one of the alveolar branches of the incisive nerve--an unusual site in the mandible. The radiographic features include expansion of cortical bone, resorption of roots of teeth, the presence of lace-like bony septa and a spotty calcification within the tumor. The treatment and the prognosis are briefly discussed.

Child↗
PubMed1980

Delayed replantation after submucosal storage in order to prevent root resorption after replantation. An experimental study in monkeys.

The purpose of this study was to determine the root resorption pattern of teeth autotransplanted to a submucosal site and to determine whether root resorption after replantation could be prevented by delayed replantation of teeth after submucosal storage in order to regenerate damaged periodontal ligament. Permanent teeth were extracted in green Vervet monkeys. One group of teeth was transplanted to a submucosal site and examined histologically in situ. Another group of teeth was autotransplanted to submucosal sites, recovered and replanted either 2 or 6 weeks later. The animals were sacrificed 8 week after replantation and examined histometrically. The following histologic parameters were registered: surface resorption, inflammatory resorption, replacement resorption (ankylosis), periapical inflammatory changes and downgrowth of pocket epithelium. Teeth autotransplanted to submucosal sites developed surface and inflammatory resorption. In half of the cases where teeth were transplanted with a vital periodontal ligaments new formation of bone took place adjacent to the transplant. Delayed replantation after submucosal burial was not found to inhibit the development of ankylosis, but changed the resorption type from direct apposition of bone upon the root surface to apposition of bone after initial resorption.

Animals↗
PubMed1983

The effect of splinting upon periodontal and pulpal healing after autotransplantation of mature and immature permanent incisors in monkeys.

The effect of splinting upon periodontal and pulpal healing after autotransplantation of teeth with complete and incomplete root formation was studied in 16 green Vervet monkeys (Cercopithecus aethiops). 2 maxillary incisors were extracted in each monkey and autotransplanted to the contralateral socket. One of these teeth was stabilized with an acrylic splint for either 2 or 6 weeks, while the other incisor was non-splinted. The animals were sacrificed 8 weeks after autotransplantation and the autotransplanted teeth were examined histologically. The following histologic parameters were registered for each tooth: surface resorption, inflammatory resorption, replacement resorption (ankylosis), downgrowth of pocket epithelium, periapical inflammatory changes and extent of pulp necrosis. The histometric analysis demonstrated that splinting increased the extent of pulp necrosis and inflammatory root resorption compared to non-splinting. Furthermore, the extent of normal periodontium was decreased among the splinted teeth, when compared to the non-splinted teeth. It is concluded that splinting not only failed to improve healing but apparently exerted a harmful effect upon periodontal and pulpal healing after autotransplantation.

Animals↗
PubMed1984

Root resorption of upper permanent incisor caused by impacted canine. An analysis of 23 cases.

Unusual root resorption of 12 central and 11 lateral upper permanent incisors in 11 patients is described. The degree of resorption ranged from loss of the apical 1/4 to almost complete loss of root structure. Excepting 1 case, permanent canines were partially or completely impacted and their crowns were in close apposition to the resorbed surfaces of the incisors. The roots of the canines were either in the process of formation or completely formed. The findings suggest that the pressure from the canine which persists in moving downward despite the lack of space to permit normal eruption could cause root resorption of adjacent incisors even in the absence of systemic factors. Of 14 extracted incisors, 10 were replaced orthodontically by the impacted canines, whereas the spaces of the extracted incisors were restored by prosthetic means in the 4 other cases. 6 incisors were preserved without any treatment and 2 with the aid of a sapphire dento-osseous anchor pin. Since the resorbed incisors were mostly free of pain, early detection by radiographic examination is essential to establish a proper diagnosis.

Adolescent↗
PubMed2000

Orthodontic, genetic, and periodontal considerations in the treatment of impacted maxillary central incisors: A study of twins.

Treatment of twins each with one impacted maxillary central incisor and a mesiodens is described. Treatment included rapid expansion, extraction of the mesiodens, surgical exposure of the impacted central incisor, and its forced eruption. The impacted incisor was brought into functional position in one patient but was lost in the other because of insufficient root length and high mobility. Orthodontic, genetic, and periodontal considerations of these 2 cases are evaluated.

Adolescent↗
PubMed2003

Early and unusual incisor resorption due to impacted maxillary canines.

A very early and severe case of maxillary incisor resorption caused by impacted canines is reported. An estimated 50,000 cases of ectopic eruption and impaction of maxillary canines occur each year in the United States. Although incisor resorption due to ectopically positioned permanent maxillary canines can be swift, silent, and devastating, an effective protocol has been developed for early detection and management of this condition. Palpation and, if indicated, radiographic evaluation are combined with primary canine removal in selected cases. These strategies--particularly when used early--can prevent the vast majority of palatally impacted maxillary canines and the potentially devastating resorption of adjacent incisors.

Child↗
PubMed2004

Histologic analysis of pulpal revascularization of autotransplanted immature teeth after removal of the original pulp tissue.

The survival rate of replanted and autotransplanted teeth is mainly affected by the reaction of the pulp. Pulpal necrosis can cause periapical inflammation and inflammatory root resorption. The purpose of this study is to learn more about the pulpal changes in autotransplanted immature teeth whose pulp tissue was removed before transplantation. The experimental material consisted of 16 single-rooted teeth with open apices, from a beagle dog (3 months of age). At day 0, 4 teeth were extracted, the pulpal tissues were removed, and the teeth were then transplanted to their contralateral side. The same procedure was carried out on days 9, 16, and 23, each time for 4 single-rooted teeth. Longitudinal paraffin sections were made for histologic investigation. The results showed that, after 7 days, 2 of the 4 teeth had an ingrowth of new tissue over one fourth of their length. After 14 days, all 4 teeth had ingrowth (> or =one fourth of the pulp chamber). At the 21-day observation, more than half of the pulp chambers of all teeth were filled, and, after 30 days, there was total ingrowth in 3 of the 4 teeth. This new tissue consisted of well-organized and well-vascularized connective tissue.

Animals↗
PubMed1991

Patient characteristics and treatment variables associated with apical root resorption during orthodontic treatment.

Multivariate analysis of patient characteristics and clinical variables was carried out with the maximum single maxillary incisor apical root resorption for each patient as the dependent variable. Root lengths were measured in standardized intraoral radiographs from 485 consecutively treated patients, 11.5 to 25 years of age. The correlation matrix revealed a complex pattern of positive and negative associations between the six pretreatment and seven treatment variables. Variables found to contribute significantly to apical root resorption were overjet, history of trauma to maxillary incisors before initiation of treatment, time of treatment with rectangular arch wires, time of treatment with Class II elastics, lip/tongue dysfunction, and/or history of finger-sucking habits persisting beyond the age of 7 years, and impacted maxillary canines to be corrected orthodontically. Clinical application of an open activator was significantly correlated with overjet but negatively correlated with apical root resorption, with the use of rectangular arch wires and/or Class II elastics, and with total banding time.

Adolescent↗
PubMed1996

Distal movement of premolars to provide posterior abutments for missing molars.

In 24 patients with missing molar teeth in the upper and/or in the lower jaw, 32 premolars were distalized. The mean orthodontic distalizing distance was 9.4 mm (SD 2.6). After distalization all these teeth served as posterior abutments for fixed restorations. The investigation period ranged between 2.5 to 14.1 years, average 9.6 years (SD 3.2). The clinical examination criteria were sensitivity, mobility, probing depth, sulcus bleeding index; the radiologic criteria were root resorption (lateral and apical) marginal bone level and axial position. None of the 32 premolar abutments were lost during investigation period. All the teeth maintained their vitality. The measured probing depths and sulcus bleeding indices were low. Of the teeth tested 40.6% revealed localized lateral root resorption on the pressure side; the average postorthodontic depth of root resorption was 0.7 mm (SD 0.3), and the length 2.3 mm (SD 0.6). The follow-up examination revealed a partial repair of the lateral root lesions. The extent of apical root resorption amounted to 0.9 mm (SD 1.1). The marginal bone level showed a bone loss of 0.5 mm mesially and 0.2 mm distally. The findings confirm that the distalized premolar functioning as a posterior bridge abutment represents a prognostically favorable alternative to an implant.

Adolescent↗
PubMed1996

Levels of root resorption associated with continuous arch and sectional arch mechanics.

The purpose of this study was to evaluate differences in the extent of root resorption between continuous arch and sectional mechanics. Fifty-six persons with similar malocclusions requiring the extraction of four premolars were divided into two equal groups and treated with the two different techniques. Once the canines were retracted with sliding mechanics (continuous arch wire group) or with force driven retraction loops (sectional mechanics group), the anterior teeth were then retracted with 300 gm Sentalloy coil springs (GAC international, Central Islip, N.Y.). The extent of root resorption of the anterior teeth was evaluated radiographically. Both treatment groups exhibited the same levels of resorption indicating that the side effect of treatment may be due to individual variation and not to the "round tripping" of teeth so often assumed.

Adolescent↗