SEARCH · PubMed Health
Results for “Tooth, Unerupted”
Explore indexed PubMed citations for clinical trials, systematic reviews and public health research. Read source abstracts and follow each citation to its original PubMed record.
Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.
An unusual radiographic finding.
Explore the source record for details and available documents.
The use of resin-bonded porcelain crowns for primary molars in infra-occlusion.
Infra-occluded primary molars without permanent successors may require restorative treatment to maintain occlusal stability and periodontal health in addition to creating an aesthetic result. This paper describes the use of two resin-bonded porcelain crowns to provide a simple, minimally invasive technique using a material with good wear resistance and high strength to create an aesthetic and functional occlusion.
Interdisciplinary management of hypodontia: oral surgery.
Explore the source record for details and available documents.
Lack of tooth eruption following maxillary fracture: case report.
Aberrant tooth development following facial fractures is unusual. It is commonly reported that tooth buds involved in the line of a mandibular fracture will continue to develop normally and erupt sequentially. Few cases have been cited regarding developing teeth in the line of maxillary fractures. In the case reported, the normal growth and position of a maxillary third molar can be seen to be retarded at the position of a maxillary fracture, sustained by a child in the mixed dentition phase of dental development.
Orthodontic and prosthodontic treatment of ectodermal dysplasia--a case report.
In addition to its other symptoms, ectodermal dysplasia causes anodontia and hypodontia intraorally. Partial or total anodontia results in some loss of function, such as chewing, and affects aesthetics. Prosthodontic rehabilitation can be accomplished with fixed, overdenture, complete, or implant-retained prostheses. For rehabilitation, it is crucial to know the age, number and condition of present teeth, and the state of growth of the patient. A 10-year-old male patient who visited our clinic was treated by a multi-disciplinary team of surgeons, orthodontists, and prosthodontists. An overdenture was planned, and an implant-supported prosthesis was considered for when the patient had finished growing. A clasp retained over the denture was planned for prosthetic rehabilitation after considering his growth and the number and condition of his present teeth.
Complications following replantation of a primary incisor: a cautionary tale.
The replantation of avulsed primary incisors is contra-indicated. This case describes an 8-year-old child who six years previously had avulsed and had replanted a primary central incisor. At presentation, this tooth was retained, the permanent successor had failed to erupt and appearance of the adjacent lateral incisor was notably delayed. Investigation revealed a radicular cyst in relation to the replanted deciduous incisor together with severe displacement of the permanent tooth, which could not be saved.
Evaluation of a new radiographic technique: outcome following removal of mandibular third molars.
OBJECTIVE: To compare the effect on outcome of third molar removal of pre-operative radiographic assessment by two different techniques. METHODS: Two hundred and sixty three patients were allocated prior to surgery to one of two diagnostic groups. One hundred and thirty-seven were examined by the Scanora and 126 by a panoramic plus three intra-oral radiographs. Ten oral surgeons recorded their operating time in minutes. Postoperative pain was recorded 4 h after the operation by the patients on a Visual Analog Scale (VAS). The following clinical parameters were recorded at the 1-week postoperative examination: alveolitis, bleeding, and swelling related to the operation area, and any other complications such as paresthesia, nausea and trismus. RESULTS: There was no significant difference in operation time between the two groups of patients (t-test; P > 0.82) nor in the frequency of immediate postoperative pain (chi 2-test; P > 0.5). There were no statistically significant differences in pain score between patients who experienced pain in the two groups (P = 0.10). Sixty-four patients experienced one or more postoperative complications, but the differences between the two groups were not statistically significant (chi 2-test; P > 0.05). There were no significant differences between the surgeons in the number of patients they operated on who experienced pain (chi 2-test; P = 0.18) or who developed complications (chi 2-test; P = 0.27). CONCLUSION: There are no adverse effects on the rate of postoperative complications when surgeons with little experience with it base their diagnosis and treatment plan on Scanora compared with conventional radiography.
Evaluation of a new radiographic technique: diagnostic accuracy for mandibular third molars.
OBJECTIVE: To compare the accuracy of Scanora with that of traditional panoramic and intra-oral radiography for the assessment of impacted mandibular third molars. METHODS: Two hundred and fifty-four patients referred for removal of impacted or partly erupted third molars were randomly allocated to one of two groups; 133 were examined by the Scanora system and 121 by a panoramic plus a series of three intra-oral radiographs. The radiographs were read by a trained oral radiologist and her diagnoses validated against the surgeons' findings at operation. RESULTS: There was agreement about the state of tooth eruption in 71.4% of Scanora and 74.4% of conventional examinations and about tooth position in 77.2 and 69.7% respectively (P < 0.05). The number of roots was assessed more accurately by Scanora (82.7% agreement) than by conventional (71% agreement) examination (P < 0.05). There was agreement about the root morphology in 70.4% of Scanora and 62.4% of conventional examinations. In 12% of the patients, the roots were in very close contact with the canal determined by the surgeon. In approximately 50% of these cases, the close contact to the canal was found by radiography with no significant differences between the methods. CONCLUSION: The Scanora method was more accurate when validated against the surgeons' findings for the position and number of roots of ectopic mandibular third molars while both methods were equally accurate in demonstrating the relation between the roots and the inferior alveolar nerve.
A concept and classification of centers of rotation and extraoral force systems.
Explore the source record for details and available documents.
Premolar enucleation.
A study was made on 27 cases where enucleation of four first premolars was performed simultaneously without introduction of mechanical devices to influence space closure. The results suggested that: 1. Enucleation of premolars can be used to minimize the severity of crowding in arch-length deficiency cases. 2. There is no damage to the remaining teeth and alveolar process when enucleation is accomplished with good surgical technique. 3. The average amount of lingual tipping of the mandibular incisors in approximately four years subsequent to the enucleation procedure was 4.1 degrees. 4. This amount of lingual tipping compares quite favorably with the amount of lower incisor uprighting experienced during growth and could not be considered excessive. 5. The mandible does tend to rotate in a counterclockwise manner following enucleation of four first premolars without appliance therapy. This rotation was considered significant in comparison with the amount of rotation that could be expected from an untreated sample. 6. If orthodontic treatment is planned, the enucleation of the manddibular second premolars in borderline extraction cases to avoid excessive lingual tipping of the mandibular incisors would seem to be questionable. 7. Various combinations of enucleation and tooth extraction may be helpful in treatment planning. 8. With judicious timing the enucleation of four first premolars can minimize the severity of the malocclusion simplifying appliance therapy if proper diagnosis and good surgical technique are employed. 9. Although conventional serial extraction may accomplish similar ends, it would appear that enucleation would offer some advantages in terms of autonomous adjustment of the mandibular incisors and root positioning of mandibular cuspids. 10. Enucleation cases usually require fewer traumatic surgical procedures and less supervision by the orthodontist. 11. The parents should be informed that serial extraction procedures including enucleation may simplify but will not eliminate the need for appliance therapy.
Management of orthodontic treatment when first premolars are substituted for canines.
Explore the source record for details and available documents.
Late third molar genesis: its significance in orthodontic treatment.
(1) Third molar genesis may occur up to the age of sixteen years, although the possibility of their appearance after the age of twelve years is reduced. (2) When third molar genesis is delayed beyond the age of ten years, the possibility of all four third molars developing is reduced by about fifty percent. (3) The intraindividual variability in stage of development of third molars increase when genesis is delayed beyond ten years of age. (4) There is no significant difference in size of early and late developing third molars.
Extreme distal migration of the mandibular second bicuspid. A variant of eruption.
A five-year study of 26,264 panoramic radiographs found distal positioning of the mandibular second bicuspid associated with a missing adjoining first molar in one of every 505 patients. Following early removal of the first molar, there is a 5% to 10% chance that the second bicuspid will migrate distally. It usually continues until it contacts the root of the second molar, and then rotates up into occlusion adjacent to the parallel with that tooth. Mesial drift seldom occurs in this circumstance; the resulting space between lower first and second bicuspids remains. Early conservative management can be very important in these cases, making periodic x-ray examination advisable whenever a molar has been lost and the adjoining bicuspid has not yet erupted.