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1.
RGO (Porto Alegre) ; 69: e20210032, 2021. graf
Article in English | LILACS-Express | LILACS, BBO | ID: biblio-1340563

ABSTRACT

ABSTRACT Digital dentistry is a ubiquitous phenomenon nowadays but it requires access to technologies and learning curve. To aid digital workflow implementation, digital steps can be progressively incorporated in conventional workflows. We aimed to demonstrate a multidisciplinary oral rehabilitation performed mixing conventional procedures with digital open-source software programs and low-cost devices. A 46-year-old female patient had photographs, intraoral scans, and cone-beam computed tomography obtained and used in combination with conventional clinical exams to develop a treatment plan. Power point software was used for digital smile planing and Horos for digital implant planning. The digital dataset were used to guide conventional clinical procedures (scaling and root planning, gingivoplasty, in-office tooth bleaching, fiber-post restoration, implant and bone graft placement, teeth preparation, and protheses design and milling). The inclusion of digital steps in the conventional workflow enabled the performance of rehabilitation procedures with reduced clinical time and increased predictability, favoring the overall workflow and the communication among the different dental specialties. A mixed workflow can progressively lead to an exclusively digital workflow as technologies become accessible and learning curve is coped.


RESUMO Atualmente, a Odontologia digital é um fenômeno onipresente, contudo exige acesso à tecnologia e curva de aprendizado. Para auxiliar na implementação de fluxos de trabalho digitais, etapas digitais podem ser progressivamente incorporadas nos fluxos de trabalho convencionais. Nosso objetivo foi demonstrar uma reabilitação oral multidisciplinar realizada combinando procedimentos convencionais e ferramentas digitais de baixo custo e acesso aberto. Uma paciente de 46 anos teve fotografias, exames intraorais e tomografia computadorizada de feixe cônico obtidos e usados em combinação com exame clínico convencional para desenvolvimento de um plano de tratamento. O software Power Point foi utilizado para o planejamento digital do sorriso e o Horos para o planejamento digital dos implantes. O conjunto de dados digitais foi usado para orientar a execução dos procedimentos clínicos convencionais (raspagem e alisamento radicular, gengivoplastia, clareamento dental, restauração com pino de fibra de vidro, inserção de implantes e enxerto ósseo, preparos protéticos e design e fresagem protética). A inclusão de etapas digitais no fluxo de trabalho convencional permitiu redução do tempo clínico na realização da reabilitação aliado à maior previsibilidade, favorecendo o fluxo de trabalho e a comunicação entre as diferentes especialidades odontológicas. O fluxo de trabalho misto pode progressivamente levar a um fluxo de trabalho exclusivamente digital à medida que as tecnologias se tornem acessíveis e a curva de aprendizado superada.

2.
J. appl. oral sci ; 27: e20180480, 2019. tab, graf
Article in English | LILACS, BBO | ID: biblio-1002402

ABSTRACT

Abstract Objectives: To measure and compare in vivo and in vitro pulp temperature (PT) increase (ΔTEMP) over baseline, physiologic temperature using the same intact upper premolars exposed to the same Polywave® LED curing light. Methodology: After local Ethics Committee approval (#255,945), local anesthesia, rubber dam isolation, small occlusal preparations/minute pulp exposure (n=15) were performed in teeth requiring extraction for orthodontic reasons. A sterile probe of a temperature measurement system (Temperature Data Acquisition, Physitemp) was placed within the pulp chamber and the buccal surface was sequentially exposed to a LED LCU (Bluephase 20i, Ivoclar Vivadent) using the following exposure modes: 10-s low or high, 5-s Turbo, and 60-s high. Afterwards, the teeth were extracted and K-type thermocouples were placed within the pulp chamber through the original access. The teeth were attached to an assembly simulating the in vivo environment, being similarly exposed while real-time temperature (°C) was recorded. ΔTEMP values and time for temperature to reach maximum (ΔTIME) were subjected to two-way ANOVA and Bonferroni's post-hoc tests (pre-set alpha 0.05). Results: Higher ΔTEMP was observed in vitro than in vivo. No significant difference in ΔTIME was observed between test conditions. A significant, positive relationship was observed between radiant exposure and ΔTEMP for both conditions (in vivo: r2=0.917; p<0.001; in vitro: r2=0.919; p<0.001). Conclusion: Although the in vitro model overestimated in vivo PT increase, in vitro PT rise was close to in vivo values for clinically relevant exposure modes.


Subject(s)
Humans , Temperature , Dental Pulp/radiation effects , Curing Lights, Dental/adverse effects , Radiation Dosage , Reference Values , Time Factors , In Vitro Techniques , Regression Analysis , Reproducibility of Results , Analysis of Variance , Radiation Exposure
3.
Braz. dent. j ; 25(1): 38-42, Jan-Feb/2014. tab, graf
Article in English | LILACS | ID: lil-709408

ABSTRACT

During the cementation of ceramic veneers the polymerization of resin cements may be jeopardized if the ceramics attenuate the irradiance of the light-curing device. The aim of this study was to evaluate the effect of different types and thicknesses of ceramic veneers on the degree of conversion of a light-cured resin-based cement (RelyX Veneer). The cement was light-cured after interposing ceramic veneers [IPS InLine, IPS Empress Esthetic, IPS e.max LT (low translucency) and IPS e.max HT (high translucency) - Ivoclar Vivadent] of four thicknesses (0.5 mm, 1.0 mm, 1.5 mm and 2.0 mm). As control, the cement was light-cured without interposition of ceramics. The degree of conversion was evaluated by FTIR spectroscopy (n=5). Data were analyzed with one-way ANOVA and Tukey's test (α=0.05). Significant differences were observed among groups (p<0.001). The degree of conversion was similar to the control for all light-cured groups with interposition of ceramics of 0.5 mm and 1.0 mm (p>0.05). Among 1.5-mm-thick veneers, IPS e.max LT was the only one that showed different results from the control (p<0.05). At the thickness of 2.0 mm, only the IPS e.max LT and HT veneers were able to produce cements with degrees of conversion similar to the control (p>0.05). The degree of conversion of the evaluated light-cured resin cement depends on the thickness and type of ceramics employed when veneers thicker than 1.5 mm are cemented.


Durante a cimentação de facetas cerâmicas, a polimerização de cimentos resinosos pode ser comprometida se a cerâmica atenuar a irradiância do aparelho fotopolimerizador. O objetivo deste estudo foi avaliar o efeito de diferentes tipos e espessuras de facetas cerâmicas sobre o grau de conversão de um cimento resinoso fotopolimerizável (RelyX Veneer). O cimento foi fotoativado após a interposição de facetas cerâmicas [IPS InLine, IPS Empress Esthetic, IPS e.max LT (baixa translucidez) e IPS e.max HT (alta translucidez) - Ivoclar Vivadent] de quatro espessuras (0,5 mm; 1,0 mm; 1,5 mm e 2,0 mm). Como controle, o cimento foi polimerizado sem interposição de cerâmica. O grau de conversão foi avaliado por espectroscopia FTIR (n=5). Os dados foram analisados através de ANOVA a um critério e teste de Tukey (α=0,05). Foram observadas diferenças significativas entre os grupos (p<0,001). O grau de conversão foi semelhante ao do controle para todos os grupos polimerizados com interposição de cerâmicas de 0,5 mm e 1,0 mm (p>0,05). Entre as facetas de 1,5 mm de espessura, IPS e.max LT foi a única que apresentou resultados diferentes do controle (p<0,05). Com a espessura de 2,0 mm, apenas IPS e.max LT e HT foram capazes de produzir cimentos com grau de conversão semelhantes aos do controle (p>0,05). O grau de conversão do cimento resinoso fotopolimerizável avaliado depende da espessura e do tipo de cerâmica utilizados quando facetas mais espessas do que 1,5 mm são cimentadas.


Subject(s)
Ceramics , Dental Veneers , Light
4.
Full dent. sci ; 4(16): 611-614, out. 2013. ilus
Article in Portuguese | LILACS, BBO | ID: lil-695735

ABSTRACT

Um dos problemas odontológicos mais vivenciados pelos cirurgiões dentistas refere-se ao tratamento restaurador de dentes despolpados. Nessas situações, a retenção para o material restaurador é normalmente crítica. Quando a região da câmara coronária apresenta condições adequadas para os princípios de retenção podem-se empregar as coroas tipo Endocrown. No entanto, atualmente, este tipo de tratamento se torna não apenas um problema funcional, mas também estético. Dessa forma, o objetivo deste trabalho é apresentar uma sequência operatória para restaurar um dente posterior despolpado utilizando uma coroa Endocrown para restabelecer a função e a estética


One of the most common problems faced by the dentists is the restorative treatment of pulpless teeth. In these situations the retention for the restorative material is usually critic. When the pulp chamber presents appropriate conditions for the retention the Endocrown type crown can be used. However, nowadays, this type of treatment becomes not only a functional problem, but also an aesthetic one. In that way, the aim of this work was to present an operative sequence to restore a non vital tooth using Endocrown to reestablish aesthetics and function


Subject(s)
Humans , Female , Adult , Dental Porcelain/therapeutic use , Dental Restoration, Permanent , Dental Impression Technique , Endodontics/methods
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