Search

Ectopic eruption of the permanent first molar can lead to malocclusion if left untreated. Despite several reported etiologic factors and treatment options, ectopic eruption caused by an improper restoration on an adjacent tooth and a simple solution have never been documented. Case report: An 8-year-old boy presented with an entrapped ectopic permanent mandibular first molar under the poorly adapted margin of a preformed metal crown (PMC) on the adjacent primary second molar. Replacement with a PMC that had well-contoured margins followed by inserting a separating module between the proximal contact of the two teeth resulted in successful management of this situation in 1 month. Conclusion: This simple approach with good interdisciplinary communication is practical for correcting eruption problems due to a poorly adapted PMC, with long-term satisfactory results. To avoid subsequent malocclusion and unnecessary treatments, dental practitioners must be vigilant when manipulating PMCs and assessing the marginal adaptation prior to their cementation. [ABSTRACT FROM AUTHOR]

To evaluate the effects of bite-raising with light-cured orthodontic band cement, a method commonly used in contemporary orthodontic treatment, on masticatory function, as assessed by objective and subjective methods. The objective evaluation of masticatory performance and subjective evaluation of masticatory ability were performed on 30 healthy volunteers (19 females and 11 males, 22.3 ± 1.56 years) with a normal occlusion. Assessment was performed before and immediately after bite-raising. The bite-raising was done by adding light-cured orthodontic band cement (3 × 5 × 2-mm width × length × height) on the palatal cusps of the upper first molars. The masticatory performance index (MPI) was calculated from chewed test food particles using a sieving method. For the subjective evaluation, the participants performed the food intake ability (FIA) test using a questionnaire with six types of food. The correlation between the evaluation methods was determined. The MPI and FIA scores of the participants were significantly reduced after bite-raising (P <.001). The MPI and FIA score reduction was not significantly different between females and males. No significant correlations were found between the changes in MPI and FIA scores. Masticatory function after bite-raising with light-cured orthodontic band cement was immediately reduced, both objectively and subjectively. However, because there was no significant correlation between the objective and subjective results, an individual may not perceive his/her decreased masticatory ability to the same degree as masticatory performance was reduced. Further study is required to evaluate the long-term adaptation to this bite-raising method. [ABSTRACT FROM AUTHOR]

Purpose: The purpose of this study was to assess the development of sleepdisordered breathing (SDB) symptoms and the relationship between the amount of increased vertical dimension and severity of SDB symptoms in healthy children wearing orthodontic removable appliances with posterior bite planes. Methods: The Obstructive Sleep Apnea-18 (OSA-18) questionnaire and Pediatric Sleep Questionnaire (PSQ) were used as data collecting tools. The questionnaires were filled out by 16 parents of children who had an anterior crossbite with Class I skeletal pattern. The data were collected three times: one month preinsertion of the appliance; one day post-insertion; and one month post-insertion. Results: There were no significant differences between the OSA-18 or PSQ results collected at different times. Pearson's correlation revealed no significant relationship between the posterior bite plane thickness and the difference in scores (P>0.05). Conclusion: Short-term treatment using such appliances does not initiate SDB symptoms, and the amount of increased posterior bite plane thickness does not relate to the severity of SDB symptoms. [ABSTRACT FROM AUTHOR]