Objective Isotretinoin, also known as 13-cis-retinoic acid, is an isomer of tretinoin, the oxidized form of Vitamin A. Orthodontic tooth movement (OTM) is the result of a cascade of inflammatory responses stimulated by a physical element that is the force generated by orthodontic appliances. Isotretinoin is mainly used among adolescents and young adults, and coincidentally it is this age group that also undergoes orthodontic treatment. Materials and Methods Thirty-five animals were used, and they were randomly divided into 7 groups, containing 5 animals in each group. Group 1: Control; Group 2: OTM for 7 days; Group 3: OTM for 14 days; Group 4: Treated with isotretinoin for 14 days; Group 5: Treated with isotretinoin for 21 days; Group 6: Treated with isotretinoin for 14 days and undergoing OTM for 7 days; Group 7: Treated with isotretinoin for 21 days and undergoing OTM for 14 days. In Groups 6 and 7, the animals were treated with isotretinoin at a dosage of 1.0mg/kg/day for 7 days before OTM and maintained during the movement period in the respective groups. Results There was no significant difference on microtomographic parameters [Trabecular Volume (BV/TV), Trabecular Thickness (Tb.Th), Number of Trabeculae (Tb.N) and Trabecular Separation (Tb.Sp)] and tooth displacement between groups. Conclusion Isotretinoin did not cause a reduction in tooth displacement during OTM when administered at a dose of 1.0mg/kg/day and isotretinoin did not change the microtomographic parameters of animals treated with isotretinoin + OTM.

Anterior crossbite refers to the abnormal vestibulolingual relationship in the sagittal dimension between one or more anterior superior and inferior anterior teeth. It can be classified as dental, functional or skeletal. Each has its own diagnostic criteria and specific treatment, and it is up to the dentist to know how to distinguish between these different natures of malocclusion. In this sense, the aim of this study is to show a case report about an ACM. Patient HCA, female, 7 years old, attending the Preventive Orthodontics Clinic of the Faculty of Dentistry of Araçatuba - UNESP, having as main complaint “untidy front tooth”. The patient has no history of systemic diseases or medication use. The patient was in the first transitional period of mixed dentition with her right maxillary central incisor in crossbite relationship with its antagonists mandibular central incisor. On both sides, the patient had the first permanent molars in Class I relationship, the deciduous second molars with mesial step and the deciduous canines in a Class I. Initially, an acrylic appliance with an expander was installed. Due to lack of cooperation, the treatment plan was changed and the patient received a fixed appliance with a 2x2 configuration, with brackets on maxillary central incisors and edgewise tubes on maxillary deciduous molars. In the lower arch, a bite lift was performed on the occlusal surface of mandibular deciduous molars to unblock the occlusion and facilitate the movement of right maxillary central incisor. The total treatment time was 60 days.

Tooth extractions for orthodontic purposes has been a topic discussed for over a hundred years and, currently, the criteria that determine the choice of this form of treatment go beyond the analysis of models and the position that the teeth are in the bone base. The aim of this study was to analyze the indications for extractions, which teeth are extracted most frequently, and post-treatment stability. The study was developed from an electronic search in PubMed/Medline and Google Scholar databases. Articles published over a 10-year period were selected that addressed extractions in the treatment plan. Duplicate articles in both databases and those that did not address the topic of Extractions were excluded. 468 articles were found in PubMed and 152 in Google Scholar, 472 were excluded, 153 articles were examined, reaching the selection of 37 articles and, of these, only 12 were used for the development of this work. The extractions are indicated in cases of dental and skeletal discrepancies, protrusion or biprotrusion and ortho-surgical treatments. The main teeth to be extracted are the maxillary premolars due to their location in the arch and post-treatment stability was similar to cases where extractions are not chosen in the treatment plan.

A erosão dentária é um processo crônico, caracterizado pela dissolução química da superfície dental, em decorrência da ação de ácidos de origem intrínseca, extrínseca ou idiopática. Estima-se que esta condição afete, mundialmente, cerca de 30-50% da dentição decídua e 20-45% da permanente. O objetivo deste trabalho foi relatar um caso clínico de erosão dentária moderada associada à alta ingestão de alimentos ácidos e fermantados. Paciente do sexo masculino, leucodermo, 8 anos, compareceu à Clínica de Odontopediatria da Faculdade de Odontologia de Araçatuba para consulta preventiva. Durante a anamnese, constatou-se consumo de refrigerante 2 vezes por semana, suco de frutas ácidas 2 vezes ao dia e bebida láctea açucarada 1 vez ao dia. Ao exame clínico, foi observado ausência de lesões cariosas, tecido gengival sadio, entretanto, havia a presença de fluorose generalizada e desgaste dental erosivo generalizado, com características como brilho excessivo, lisura e lesões do tipo “cupping” na superfície oclusal dos molares decíduos, além de desgaste nas bordas incisais de incisivos e caninos. A conduta clínica imediata envolveu orientação de dieta e higiene aos responsáveis, enfatizando os fatores causais e a característica irreversível do desgaste dental erosivo. Foram realizadas quatro sessões de aplicação tópica de verniz fluoretado. O acompanhamento odontológico infantil e o diagnóstico precoce de desgastes dentários são de suma importância, a fim de minimizar os danos estruturais aos dentes decíduos e também prevenir danos à dentição permanente.