Virtual facebow techniques: A scoping review.

STATEMENT OF PROBLEM: Although advances in technology continue to improve the acquisition of patient data and the manufacturing of different oral rehabilitations, the method of transferring clinical information to a virtual environment has not yet been consolidated in the literature. PURPOSE: The purpose of this scoping review was to map the existing literature on different techniques of transferring information from virtual facebows for oral rehabilitation. MATERIAL AND METHODS: This scoping review was structured using a 5-step methodology based on guidelines proposed by Arksey and O'Malley: (1) characterization of the research question, (2) identification of relevant studies, (3) selection of studies, (4) mapping of results, and (5) selection, summary and reporting of the data. The Joanna Briggs Manual for Evidence Synthesis was followed and the review was guided by the Preferred Reporting Items for Systematic Reviews and Meta-Analyses extension for Scoping Reviews (PRISMA-ScR). The guiding question for the development of this review was, "What virtual facebow techniques are being used to transfer anatomic data to the virtual environment?" RESULTS: A total of 1745 articles were found during the search, and 20 were included in this review. Nineteen of the included articles had positive results with the described techniques of registration and transfer of anatomic references to the virtual environment; however, 1 study indicated that the technique was negative. CONCLUSIONS: Based on the findings, facial scanning, 2-dimensional photographs, and cone beam computed tomography are feasible methods of acquiring extraoral anatomic landmarks. The use of a device that allows the convergence of intraoral and extraoral images by superimposing data was revealed to be a promising option.

Muscle activity between dentate and edentulous patients rehabilitated with dental prostheses: A systematic review.

BACKGROUND: Adequate muscle activity is important for the success of oral rehabilitation: it maintains the integrity of the stomatognathic system and is responsible for chewing movements needed to break, crush and grind food. OBJECTIVE: To compare muscle activity using electromyography (EMG) while clenching or chewing soft and/or hard foods among individuals with natural dentition (ND) and edentulous patients rehabilitated with dental prostheses. METHODS: This review was conducted until March, 2023, and the research question was "Is the muscle activity of edentulous patients rehabilitated with dental prostheses similar to that of dentate individuals?" A search strategy was conducted in PubMed/MEDLINE, The Cochrane Library, Web of Science, Lilacs, Embase and manual journal searches. RESULTS: Ten studies were included in the analysis. Most of them reported that individuals with ND had significant higher muscle activity (clenching or chewing) than complete dentures (CD) users. However, no difference was observed between patients with full mouth implant-supported fixed dental prosthesis (ISFDP) and ND. Additionally, two studies compared patients with mandibular ISFDP with maxillary CD and individuals with ND and found no differences; however, one study concluded that patients with ISFDP with CD (maxillary or mandibular) had lower muscle activity than individuals with ND. Only one study reported a higher muscle activity in patients with full-mouth ISFDP than in individuals with ND. CONCLUSIONS: Bimaxillary CD users had lower muscle activity than individuals with ND. During rehabilitation, the muscle activity of patients with full-mouth ISFDP and mandibular ISFDP with maxillary CD is similar to individuals with ND.

Perfil sociodemográfico e odontológico de usuários de próteses totais do programa de extensão universitária Resgatando Sorrisos / Sociodemographic and dental profile of users of total protheses in the university extention program "Resgatando Sorrisos"

Objetivo: Realizar uma análise transversal do perfil sociodemográfico e clínico de pacientes edêntulos bimaxilares e dos hábitos de uso das suas próteses totais (PT) antigas. Posteriomente, os participantes foram reabilitados com próteses totais, em um período de 3 anos (2017- 2019)), em três municípios do estado de Pernambuco - Brasil, por meio de um programa de extensão universitária. Métodos: 58 participantes foram avaliados por meio de um questionário composto de 73 questões. Os dados coletados permitiram uma avaliação quantitativa, e o nível de significância considerado foi de 0,05. Resultados: Destaca-se um perfil de pacientes idosos com uma média de tempo de desdentado total de 24,3±15,3 anos (maxila) e 22,14±14,22 (mandíbula), havendo uma maior prevalência de usuários com próteses bimaxilares (74%). Destaca-se em 57,1% da amostra, a predo-minância da escovação com creme dental e, em 42,9%, a utilização de sabão/detergente, solução de hipoclorito de sódio (NaClO) e/ou bicarbonato de sódio (NaHCO3) como coadjuvantes na higienização. Além disso, 66,6% da amostra apresentou necessidade de intervenção clínica para reparos na PT. Com relação aos hábitos deletérios, os idosos apre-sentaram menos o hábito de dormir com a prótese quando comparados a adultos (p≤0,001). Conclusão: O perfil dos participantes apresentou prevalência do gênero feminino e idade média de 63 anos, além de uma média de 20 anos desdentados (maxila e mandíbula), um tempo elevado de uso das próteses (>10 anos) e o hábito de uso contínuo. Mais da metade dos participantes utilizava métodos de higienização inadequados.

Objective: To conduct a cross-sectional analysis of the sociodemographic and clin-ical profile of edentulous bimaxillary patients and their habits of using old complete den-tures (CD).Subsequently, the participants were rehabilitated with complete dentures, in three years (2017-2019), in three municipalities located in the state of Pernambuco, - Bra-zil, through a university extension program. Methods: We evaluated a total of 58 partici-pants through a questionnaire with 73 questions. Data collected were used for quantitative assessment, and the level of significance was set at 0.05. Results: Most of the participants were elderly patients with an average total edentulous time of 24.3 ± 15.3 years, and 22.14 ± 14.22 years at the maxilla and mandible, respectively. In addition, there was a high prev-alence of users who had bimaxillary prostheses (74%). In 57.1% of the sample, there was a predominance of brushing with toothpaste, 42.9% used soap/detergent, sodium hypochlo-rite solution, and (or) sodium bicarbonate as adjuvants in cleaning. Moreover, 66.6% of the patients needed a clinical intervention for CD repairs. About the harmful habits, the elderly showed a less frequent habit of sleeping with their prostheses compared to the adults (p ≤ 0.001). Conclusion: Most of the participants were female with an average age of 63 years. They presented an average of 20 years of edentulousness (maxilla and mandible) and the extended use of the dentures (> 10 years), in addition to the habit of continuous use. More than half of the participants used inadequate cleaning methods.