Résumé
Aim: To evaluate the spatial distribution of MIH opacities in first permanent molars (FPM). Materials and methods: an analysis of intraoral photographs of FPM with demarcated MIH opacities was conducted. The presence of opacity was computed in a digital matrix, discriminating the anatomical regions of the FPM surfaces. The frequencies of distribution of the opacities were descriptively analyzed through 227 FPM digital images of 89 children built in GIMP and Python and by Spearman correlation (= 0,05). Results: the occlusal surface was the most affected one (94% to 100%). In the upper FPM, the palatine surface was the second most affected one (84%-91%). In the lower FPM, the vestibular surface was the second most affected one (85%-80%). A similar pattern of opacity distribution was observed in the contralateral teeth. On smooth surfaces, opacities were more frequent in the regions closer to the occlusal surface than to the cervical one. Conclusion: MIH opacities were mostly present on occlusal, vestibular, and lingual/palatine surfaces, respectively. There is a possibility that the occurrences are in accordance with the chronology of dental formation.
Résumé
Este estudo teve como objetivo realizar uma revisão sistemática da literatura para avaliar os efeitos dos hábitos parafuncionais de sucção sobre a ATM e estruturas adjacentes em crianças. Os artigos incluídos foram identificados por meio de pesquisas bibliográficas da Bireme, Pubmed, ClinicalTrials.gov, The National Research Register e Pro-Quest Dissertation Abstracts and Thesis, usando os termos de busca temporomandibular joint, sucking behavior and fingersucking. As pesquisas sobre os hábitos atuais ou anteriores de chupar o dedo e/ou uso de mamadeiras e chupetas e a presença de dor na ATM com crianças até 12 anos foram incluídas. Oito estudos foram selecionados, e 4 apresentaram uma associação, mas sem significância estatística. Os achados científicos demonstram uma associação baixa ou ausente de DTM com hábitos de sucção parafuncionais.
Objective: To assess the attitudes and knowledge about hepatitis by scholars and dental practitioners from Recife and its metropolitan region. Method: The research protocol was submitted and approved by the Ethics and Human Research Committee of the Federal University of Pernambuco. There were included 230 undergraduate students in dentistry and 104 dentists who exercise their professional activity in Recife and its Metropolitan Region. They signed a consent form and answered a questionnaire, the evaluative instrument, with objective questions about biosafety, transmission of hepatitis and sexually transmitted diseases. Results: About the types of hepatitis 133 (57.8%) students and 61 (58.7%) professionals claimed to know the types A, B and C. Concerning transmission 31 (13.5%) students and 25 (24.0%) professionals said that the main route of transmission were sexual and bloodstream respectively. Relating to imunization 221 (96.1%) students and 99 (95.2%) professionals reported that have been vaccinated against hepatitis B, however, only 126 (54.8%) students and 55 (52.9%) professionals have followed the immunization's schema. Regarding the cleaning of the office equipment, 18.7% of the students replied that they do not know who does it. 56.7% of professionals said that it was performed with alcohol 70 ° GL.Conclusions: The findings indicate that there is a concern for biosafety but the knowledge about the forms of hepatitis transmission and biosecurity measures need to be better settled.
Résumé
A microabrasão do esmalte é um método não-invasivo que remove defeitos intrínsecos e superficiais dos dentes objetivando melhorar a estética dentária com mínimo de perda estrutural. Este relato de caso descreve uma tentativa para a correção da cor dentária utilizando esta técnica conservativa numa paciente jovem cujo incisivo centralsuperior apresentou uma mancha branco-opaca. Microscopia eletrônica de varredura (MEV) foi realizada de modo a ilustrar o aspecto de vidro lustrado e uma textura lisa da superfície do esmalte microabrasionado. O correto diagnóstico do defeito é uma tarefa difícil ao se considerar esta abordagem conservativa.
Enamel microabrasion is a non-invasive method that removes intrinsic and superficial defects from teeth aimed to improve dental esthetic with minimal loss of dental tissue. This case presentation describes the attempt for teeth color correction utilizing that conservative technique in a young girl whose upper central incisor presented an opaque white stain. Scanning electron microscopy (SEM) was conducted in order to illustrate the glasslike luster and a smooth texture of microabraded enamel surface. The correct diagnosis of defect is a difficult task, when consider this conservative approach.
Sujets)
Humains , Femelle , Enfant , Microscopie électronique à balayage , Couleur , Microabrasion amélaire , Émail dentaire/malformations , Dentisterie esthétique , Incisive , Fluorose dentaireRésumé
O sistema de abrasão a ar pode ser definido como um novo método de preparo cavitário capaz de confeccionar cavidade de maneira ultra conservadora e adequada para serem restauradas com os materiais adesivos. Estes aparelhos produzem mínimo desconforto ao paciente devido à ausência da vibração, aquecimento e ruído durante a sua utilização. Com a finalidade de informar o clínico sobre os avanços desta tecnologia serão descritas a indicação, contra-indicação, biosegurança, biocompatibilidade, vantagens e desvantagens do sistema de abrasão a ar