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Copyright of Revista Oral is the property of Benemerita Universidad Autonoma de Puebla and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Revista de la Academia Mexicana de Odontología Pediátrica (2594-1798) is the property of Academia Mexicana de Odontologia Pediatrica, A. C. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Introduction. Recent studies carried out in the permanent dentition revealed a wide range of terminal relationships between enamel and cement described by Choquet, characterized by not having a unique pattern around the tooth neck. This is little studied in the primary dentition. Objective. To know the frequency distribution of the cemento-enamel junction in the temporary dental organs. Methodology. In a study approved by the Research and Ethics Commission of the Faculty of Stomatology of the BUAP (registration 2019104) a probabilistic, non-random sample, stratified by sex, of 73 healthy dental organs was analyzed, with more than one third of root and any dental formula of children between three and five years of age. They were observed under an optical microscope at magnifications of 5, 10 and 20x, slices obtained with the wear technique. Microphotographs obtained with a camera integrated to the microscope were analyzed by an observer (k = .9102). Results. 180 sections were obtained from the calculated sample. The percentage distribution of the cases corresponds case 1, 41%; case 2 present in 13%; case 3, 38%; and case 4, eight percent. According to the anatomic faces, case 1 was more frequent in the mesio-vestibular face (37%), case 2 in the mesio-lingual/palatal (44%), case 3 in 35% of the mesio-vestibular faces, and case 4 in 72% of the mesio-vestibular faces. Discussion. The tissue relations between the enamel and cement of the temporary dentition present the four combinations reported by Choquet in a different frequency distribution with respect to the authors consulted. Interdigitations between cementum and enamel of the primary dentition were observed, as well as serendipiti; some sui generis characteristics in the underlying dentin. [ABSTRACT FROM AUTHOR]

Introduction. It is considered that in the temporomandibular joint of children, the glenoid cavity is almost flat with a low prominence of the anterior or temporal condyle that allows the anterior displacement of the jaw, so that the incisors cross over is smaller and it is considered that there is no Spee curve, and its analysis is lacking. Objective. To analyze the frequency and risk association of the presence of the Spee curve in each of the terminal planes and the overbite. Material and method. In a cross-sectional, prospective and analytical clinical epidemiological study, a heterodemic and multicentric probabilistic sample stratified by sex was analyzed, from 140 sets of temporary dentition models of the child population aged 3 to 5 years, without loss of proximal walls or cavitations for caries, as well as with fractured dental organs. Were analyzed the dependent variables Spee curve, terminal plane and overbite. Results. Were tested the hypothesis of dependence of the Spee curve with respect to the type of terminal plane (c2 = 7.104, p = 0.01, Gl = 1). The prevalence rate of the presence of the Spee curve was 43.47%. Its association with the straight terminal plane is RM = 3.96 and with the deep bite it is RM = 2.89. Conclusions. The curve of Spee is present in the deciduous dentition and responds to the need to compensate the condylar trajectory that promotes the maximum intercuspidization that allows protrusive de-occlusion thanks to the anterior and condylar guides that avoid excessive pressure in the posterior area, optimizes the incisive function during the cutting action and promotes the wear of cusps and incisal edges, which is why deep bites were not found. [ABSTRACT FROM AUTHOR]

Copyright of Revista Oral is the property of Benemerita Universidad Autonoma de Puebla and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)