1/4. Asymmetric extraction treatment of an Angle Class II Division 2 subdivision left malocclusion with anterior and posterior crossbites.This case was chosen by the CDABO student case selection committee for publication in the AJO/DO.- - - - - - - - - - ranking = 1keywords = extraction (Clic here for more details about this article) |
2/4. The not-so-harmless maxillary primary first molar extraction.BACKGROUND: Premature loss of primary molars has been associated with space loss and eruptive difficulties, especially when the loss occurs to the primary second molars and when it occurs early. This has not been thought to be the case for primary first molars. methods: The author revisited 13 cases from an earlier study on the effects of premature loss of maxillary primary molars. These longitudinal cases were scrutinized, using serial panoramic radiographs, to explain the irregular response in terms of dental migration. The author presents two case reports. RESULTS: In the earlier study, the author used digitized study casts and the concept of D E space--the space occupied by the primary first and second molars--to describe the dental migration that occurred after premature tooth loss. Using analysis of variance on data generated using an instrument capable of measuring in tenths of millimeters, the author produced findings regarding the amount of space loss, rate of space loss, effect of age at loss, amount of space regained at the time of replacement by the permanent tooth and effect on Angle's classification. Finally, the author created a simulation describing directional change; this revealed that the maxillary primary first molar loss resulted in a mesial displacement of the permanent canine during eruption. CONCLUSIONS: When the maxillary primary first molar is lost prematurely, the first premolar erupts in a more mesial direction than normal, as a result of the mesial incline of the primary second molar, and consumes the space of the permanent canine, which becomes blocked out. CLINICAL IMPLICATIONS: Rather than use a space maintainer after the premature loss of the maxillary primary first molar, the author suggests, clinicians can choose from a number of other options for preventing the first premolar from erupting too far in a mesial direction.- - - - - - - - - - ranking = 1keywords = extraction (Clic here for more details about this article) |
3/4. Space-regaining treatment for a submerged primary molar: a case report.The aetiology of submerged primary molars is not known and optimal treatment has still not been established. If submerged primary teeth are left untreated, the occlusal consequences are space-loss due to tipping of adjacent teeth and/or overeruption of the opposing teeth. Normally, treatment consists of extraction of the deciduous teeth or observation for normal exfoliation. Here we report a case where the submerged primary molar was extracted surgically after space-loss had been regained.- - - - - - - - - - ranking = 0.25keywords = extraction (Clic here for more details about this article) |
4/4. Treatment of a patient with a mutilated Class II, Division 1 malocclusion and a dolichofacial skeletal pattern.The purpose of this case report is to present a description of the diagnosis and treatment to ABO standards of a patient with a mutilated Angle's Class II, Division 1 malocclusion, complicated by anterior dental crowding, and a dolichofacial skeletal pattern. Treatment involved extraction of the maxillary first premolars, lingual arches to enhance anchorage, and J-hook headgear to retract the maxillary anterior segments.- - - - - - - - - - ranking = 0.25keywords = extraction (Clic here for more details about this article) |