El hueso alveolar está sujeto no sólo a influencias del ambiente, sino también a otros factores como hábitos parafuncionales, tipo de alimentación, alteraciones respiratorias y enfermedades sistémicas que afectan su tamaño, forma y volumen. En cambio, el hueso basal viene genéticamente determinado y el funcionalismo dentario lo afecta menos. Por esta razón, al analizar la forma del arco es importante tener en cuenta tres aspectos: a) tipo de arco dento-alveolar, b) armonía o simetría y e) relación topográfica o volumétrica entre el arco alveolar y el hueso basal del maxilar o la mandíbula. La forma final del arco se obtiene por la configuración del hueso de soporte, la erupción de los dientes, la musculatura oro-facial y las fuerzas funcionales intraorales. La desnutrición infantil constituye un grave problema de Salud Pública en el Perú así como en el resto de Amér...

According to the WHO, three-quarters of the population suffers from tooth decay, more than 3.5 billion people worldwide.1 Although dental caries is a well-known disease, proper diagnosis has some grey areas that affect treatment and care, making proper rehabilitation of dental caries difficult for patients. Conventional methods for diagnosing dental caries, such as tactile examination and visual inspection, continue to be widely used in clinical practice. However, the sensitivity and specificity of this method are questionable and will greatly depend on the working conditions in which the professional finds himself. The conventional evaluation is usually complemented with radiographic examinations (periapical and bite-wing x-rays) that will help confirm advanced dental caries lesions or with a view to pulp involvement of the tooth. The latter is a more sensitive but less specific method ...

Composite resins are the most widely used material for restorations in the last decade. An adhesive system is required to serve as a bonding agent between the tooth structure and the restoration, and universal adhesive systems are used. However, one of the main problems in restorations is microleakage, defined as the passage of bacteria or fluids between the restorative material and the prepared cavity. Objective: To compare the degree of microleakage between three restorative systems using universal adhesives before and after the thermocycling process. Material and methods: Experimental in vitro study with a sample of dental anterior pieces of 120 bovines. Three brands of restorative systems were used for class V restorations: 3M®, FGM®, and Ivoclar®. Each brand had a control group and an experimental group. The experimental groups were subjected to a thermocycling process. After tha...

Objective: To build and validate an instrument to measure the level of knowledge about the Law that regulates the work of the dental surgeon in the Peruvian territory (Law No. 27878) of postgraduate students and teachers of the Stomatology Career of the Scientific University of South. Peru. Material and methods: The sample consisted of 38 dental surgeons, participants in the postgraduate program (20) and professors (18) of the Stomatology Career at the Universidad Científica del Sur. A structured questionnaire of 15 questions was developed based on the articles of Law No. 27878. Results: It was approved by Expert Judgment and submitted to Aiken's V with an average result of 0.95. A moderate level of correlation was obtained through the Pearson Correlation Coefficient and a Cronbach's Alpha of 0.8. Through the Exploratory Factor Analysis, 3 dimensions were formed. Conclusions: The instru...

Introduction: The dentist and auxiliary personnel are in constant risk of occupational diseases such as: allergies, infections, skin or eye injuries; that could affect patients. A problem of social interest are the ocular injuries that occur to dental personnel. The literature reveals the prevalence of eye injuries in dental practice that are associated with solid particles, fluid splashes. Our objective was, through a systematic review, to review the types of ocular injuries and their associated factors that occurred in dental practice. Material and Methods: The relevant studies were searched in the databases: PubMed, Scopus, Ebsco, among others. The search included cross-sectional studies that evaluated the evidence on ocular injuries occurring in dental practice, excluding literature reviews, letters to the reader, and editorials. Results: Eight studies were included to develop the sy...

Objective: Compare the surface roughness of two composite resins after immersion in carbonated beverages. Materials and methods: 160 resin discs (6 x 2 mm) were divided into 8 groups (n=20 per group) according to type of resin (Filtek™ Z350 XT® and Palfique LX5®) and type of immersion in beverages (distilled water, Coca Cola®, Inca Kola® and Kola Escocesa®. The immersions were carried out under a structured cycle: 4 immersions a day for 5 days, intermediate storage in distilled water and overnight incubation for 8 h at 37°C. The measurements with the roughness meter were evaluated in three times: baseline, 7 and 14 days. The three-way Anova test was used at P<0.05. Results: Roughness showed differences only for the individual factors of time (P<0.000) and resin (P=0.000), and for the interaction time*drink (P=0.000) and resin*drink (P=0.003). Roughness was higher with Filte...

Introduction: In oral rehabilitation, the use of ceramic restorations is widely accepted due to its aesthetic capacity to mimic the naturalness of the dental tissue, provide longevity of the material, and present a greater marginal fit compared to crowns with a metal structure. Termination lines are biological preparations whose function is to minimize the cervical opening of the marginal seal. Consequently, analyzing the behavior of restorative materials under compressive forces decreases the risk of fracture and increases the success of the treatment. Objective: To compare the compressive stresses of lithium disilicate crowns with three different finishing lines. Methodology: In silico study of the simulation of a dental preparation on a lower right first molar with chamfer (0.6 mm), shoulder (0.5 mm) and deep chamfer (0.5 mm) finish lines. Using the SolidWorks®️ version 2017 softwa...