Avaliação em modelos digitais das modificações ocorridas em modelos de gesso em função do posicionamento da moldeira

The objective of this study was to assess if the positioning of the impression tray could cause plaster casts distortion during gypsum setting time. fifteen pairs of master models were cast with alginate impression material and immediately poured with gypsum. impressions were allowed to set with the tray in the not inverted position (group a) or in the inverted position (group b). the plaster models were digitized using a laser scanner (3shape r-700, 3shape a/s). tooth size measurements and distances were obtained using o3d software (widialabs, brasil) measurement tools. data were analyzed by paired t test and linear regression with 5% significance. most measurements of both groups were similar, except for the lower intermolar distance. it was not possible to corroborate the presence of distortions owing to the position of the impression tray during gypsum setting time.

Conduta no tratamento de gengivite ulcerativa necrosante (GUN) em serviço de urgência

Necrotizing ulcerative gingivitis is a periodontal disease which suddenly appears and presents an acute clinical course, characterized by patients' pain, discomfort and halitosis. Ulceration on papilla and marginal gingiva can be observed. For this reason, patients presenting this condition may seek dental assistance in Health Units or Graduation Institutions, being the dentist responsible for the adoption of a clinical treatment that minimizes symptomatology. The purpose of this case report is to expose and discuss aspects of clinical treatment for this disease applied to the reality of this service.

Conduta de tratamento de gengivite ulcerativa necrosante (GUN) em serviço de urgência

Necrotizing ulcerative gingivitis is a periodontal disease which suddenly appears and presents an acute clinical course, characterized by patients' pain, discomfort and halitosis. Ulceration on papilla and marginal gingiva can be observed. For this reason, patients presenting this condition may seek dental assistance in Health Units or Graduation Institutions, being the dentist responsible for the adoption of a clinical treatment that minimizes symptomatology. The purpose of this case report is to expose and discuss aspects of clinical treatment for this disease applied to the reality of this service.

Rehabilitacion oral sobre implantes instalados por medio de la tecnica sin colgajo (flapless) y carga inmediata

The oral rehabilitation with osseointegrated implants is a well-documented treatment with high rate of success. Nevertheless, demands related to treatment time and surgical technique began to appear. In this context, the procedure of immediate loading in which the dental prosthesis is placed right after implant surgery has become a constant practice. Although immediate loading has been an important advance, minimally invasive procedures, such as implant placement without raising a mucoperiosteal flap (flapless) are increasingly being performed. Association of immediate loading with the flapless technique improves acceptance by patients and professionals, because no suturing is required. Moreover, it reduces swelling, bleeding during and after surgery, postoperative pain, surgery time, discomfort and hematoma, as well as the need for postoperative medication. These characteristics ease the stages of rehabilitation soon after implant placement, cooperating with prosthodontist's work. Thus, the proposal of this study is to present a clinical case of oral rehabilitation with osseointegrated implants and fixed prosthesis in both arches, in which the flapless technique was applied, followed by immediate loading. It will discuss the diagnosis, prosthetic planning, surgical/prosthodontic procedures and follow-up for 20 months.

Reabilitação oral de paciente com síndrome da combinação: relato de caso

The Combination Syndrome represents an important pathologic condition of the masticatory system that requires a complex rehabilitation treatment. The presence of flaccid mucosa is one of the most common features due to bone resorption of the pre-maxilla caused by anterior hyperfunction of the mandibular teeth on the maxillary complete denture, where the impact of oclusal loading in this region results in movement of the maxillary prosthesis into the ridge, resulting in increased resorption of the residual ridge, internal misfit and loss of the retention of the maxillary complete denture. The presence of flaccid mucosa, in such cases, leads to problems of support and stability of the maxillary complete denture, which can be treated by surgical reduction of the thickness of the tissue or using specific techniques of fabrication of prostheses. This article describes the oral rehabilitation of a patient with the Combination Syndrome where the surgical reduction of flaccid mucosa was not performed, using a modified technique of functional impression in two steps, with the objective of generating forces and less distortion in flaccid mucosa during functional impression.

Microstructural, physical, and fluid dynamic assessment of spinel-based and phosphate-bonded investments for dental applications

This work reports the experimental evaluation of physical and gas permeation parameters of four spinel-based investments developed with or without inclusion of sacrificial fillers. Data were compared with those of three commercial formulations. Airflow tests were conducted from 27 to 546°C, and permeability coefficients were fitted from Forchheimer's equation. Skeletal densities found for spinel- (ρs = 3635 ± 165 kg/m3) and phosphate-bonded (ρs = 2686 ± 11 kg/m3) samples were in agreement with the literature. The developed investments were more porous and less permeable than commercial brands, and the differences were ascribed to the different pore morphologies and hydraulic pore sizes of ceramic matrices. The inclusion of both fibers and microbeads resulted in increases of total porosity (42.6–56.6%) and of Darcian permeability coefficient k1 (0.76 × 10−14–7.03 × 10−14 m2). Air permeation was hindered by increasing flow temperatures, and the effect was related to the influence of gas viscosity on ΔP, in accordance with Darcy's law. Casting quality with molten titanium (CP Ti) was directly proportional to the permeability level of the spinel-based investments. However, the high reactivity of the silica-based investment RP and the formation of α-case during casting hindered the benefits of the highest permeability level of this commercial brand.

Transformação cosmética de caninos em incisivos laterais: uma abordagem sistemática

A agenesia de dentes do grupamento anterossuperior é de fácil percepção pelo leigo por afetar a estética do sorriso, sendo esse o motivo principal da busca por tratamento nesses casos. Atualmente, as diferentes opções de tratamento ampliam as possibilidades clínicas mas também trazem dúvidas e discussões sobre qual abordagem seria a ideal. O objetivo desse estudo foi avaliar, por meio da execução de um caso clínico, os parâmetros de importância no planejamento da transformação de caninos em incisivos laterais pelo uso da técnica restauradora direta com resinas compostas. Com o avanço das propriedades mecânicas, das cores e técnicas de estratificação dos materiais compósitos atuais, resultados altamente estéticos e mais duráveis podem ser conquistados. Em casos de agenesia de incisivos laterais e reposicionamento de caninos, a reanatomização com resinas compostas em incisivos laterais é um procedimento viável e com previsibilidade de resultados quando um método multidisciplinar e racional de trabalho é utilizado pela equipe odontológica.

Evaluación del comportamiento biológico de tres cementos obturadores endodónticos en tejido subcutáneo de ratones

The aim of this study was to evaluate the biological behavior of the root canal filling sealers: Endofill, Endomethasone and Sealer 26 when in contact with the subcutaneous connective tissue of rat. For the study one control and three experimental groups were used. A total of 15 animals were divided into 5 for each period: 7, 21, and 60 days. The obtained histological sections were processed and stained using the hematoxiline & eosine technique. The histological sections were subjective and comparatively analyzed using optic microscopy. The intensity of the inflammatory reaction and the level of fibrosis of the tissue were registered. The results were registered in scores and statistical analysis by KRUSKAL-WALLIS p<0,05 and MILLER methods. The statistical analysis revealed that in the period of 60 days, there was statistical significance to group II (Endofill) between group (control) and III (Endomethasone) with mononuclear cells into connective tissue. All materials promoted inflammatory reaction more intense at 7 and 21 days with the Endomethasone showing the best results.

Sistemas cerámicos puros parte 1: una evolución basada en la composicíon

The continuing advances in technology, dental materials and equipment have contributed significantly to improve the level of esthetic dentistry today. Among these innovations, development of pure ceramic restorations has evolved to give different alternatives. Dental ceramics have presented a rapidly technological changing to improve mechanical and optical properties. Currently there are several systems of metal free ceramics with excellent mechanical and optical properties, for making crowns and plurals. These modern systems are presented with various compositions and different preparation techniques, making these more versatile. Within this perspective, the dental market offers a huge range of new indirect and metal-free materials for prostheses, providing new options, plus also new questions to decide among the available alternatives. The aim of this review is take a view of the different ceramic systems in terms of its composition and different techniques of production.

Sistemas cerámicos puros parte 2: materiales, propiedades ópticas y consideraciones clínicas

While dentistry continues to advance, the aesthetic techniques have evolved in proceedings more effective, functional and biocompatible. Meanwhile, cosmetic dentistry has become a bit more complex and technically difficult. With improvement of the properties (physical and optical) of the ceramics and the establishment of a working protocol, ceramic restorations have become increasingly popular. Currently there are several ceramic systems have excellent optical properties such as opalescence, fluorescence, translucency, chromaticity, which allow the restoration to mimic the tooth structure. From the physical point of view has restored biomechanical integrity and strengthening the remaining tooth structure. All this has led the profession to experience the use of new ceramic systems ranging from conventional feldspathic ceramics to modem ceramic reinforced, injected or computer-aid made. The material selection should be based on clinical need, aesthetic and functional requirements, restoration site, prosthetic design and laboratory techniques. In this article we will deal with the characteristics of the materials, their optical properties and clinical considerations for proper selection.

Estado actual del blanqueamiento: sigue siendo un tratamiento seguro? review

The demand for cosmetic dentistry, including teeth whitening, has increased in recent years. The home teeth whitening and in-office, are widely used in dental practice. The mechanism by which it works is by oxidation of the chromogenic existing tooth structure. This is an effective and minimally invasive procedure that achieves tooth lighten the color, however, may cause alterations in the enamel surface, such as a dental permeability increase. Another effect caused by this procedure is tooth sensitivity, being the most common side effect, up to 65% of individuals have had a secondary effect at least once during treatment. This sensitivity and gingival irritation caused by bleaching may vary depending on the patient and used bleaching product

Protocolo de fotografias odontológicas na comunicação entre CD e TPD em restaurações indiretas

O planejamento estético em dentes anteriores está intimamente ligado a uma cuidadosa análise das desarmonias do sorriso do paciente. Dentro desse conceito, a fotografia odontológica, feita através de um protocolo padronizado, parece ser um auxílio-diagnóstico para uma correta verificação desses problemas. Através dessa ferramenta, é possível realizar tratamentos personalizados, obtendo, assim, uma estética natural e harmoniosa.

Impacto da saúde bucal na qualidade de vida de pacientes maiores de 50 anos de duas instituições públicas do município de Araraquara-SP

Introduction: Oral health can affect quality of life, and the OHIP-14 index (Oral Health Impact Profile) is useful for evaluating this impact. Objective: to investigate the impact of oral health conditions on the quality of life of patients over  50  years, assessing, initially, the consistency of the short form of the Oral Health Impact Profile index (OHIP-14). Material and method: A cross-sectional study was performed among 149 patients of two public institutions for routine dental (UNESP) and medical practice (Municipal). They were interviewed using the OHIP-14 formulary, assessing its internal consistency (Cronbach´s alpha coefficient) and the OHIP-mean (additive method). The patients were distributed according to sex, age, and education level. The comparisons of interest were made using Student´s t test at a 5% level of significance. Result: A total of consecutive patients (n = 149) participated of this study (87% response rate). Cronbach´s alpha coefficient was 0.78, denoting a good consistency of the OHIP index. The OHIP mean was 4.98. The most prevalently affected OHIP domains were dimensions of physical pain: painful aching (11.40%) and uncomfortable eating foods (21.50%). There was non-significant difference (p > 0.05) between the mean OHIP value in relation to each of gender, age, and education level. Conclusion: The OHIP-14 is a reliable instrument of assessing oral health-related quality of life, and among patients under routine practice, it was found a low impact of oral conditions on their quality of life in the studied institutions (UNESP and Municipal).

Informatização do consultório odontológico

Dental software allow for a practical management of clinical and administrative tasks of the dental office. The aim of this study was to correlate different software (ProDent, Is-Odonto, ExDental, DentalPro, Dental Office, Dental Clinic, Dentalis, EasyDental), through research in specialized sites on the internet, enumerating their advantages and disadvantages. Due to the variety of software in the market, the dentist should be aware of some aspects such as: friendliness of use, presence of a calendar base and administrative controls, storage of treatments and images, broader coverage of the dentist competency, direct contact with software developers, and the pertinent ethical issues.

Imageologia na odontologia e aspectos legais

The technology, through the advent of new equipments that allow imaging exams, has helped very much in the diagnosis and prognosis of diseases in Dentistry. The use of informatics, in general, in the manufacture of clinical reports is increasingly present in the dental offices. The legal validity of these systems is questioned, and is matter of discussion. This work makes considerations about Imageology or Diagnostic by image, a new area that is appearing on Dentistry. Among other exams, there are: digital radiography, tomography, computed tomography, artomography, magnetic resonance, computed cefalometry and ultra-sonography. It permits the professional to obtain a better diagnostic, and to the patient, the visualization of his problem and treatment. A survey on the possibilities of using informatics in Dentistry, particularly in Radiology, was also carried out, as well as the legal aspects, which are in accordance with the Law 8.935/94, what guarantees its practicability. Digital Certification is a mechanism that provides legal validity to documents and, as such, to radiographic images and others. It is a procedure that the dentist should take to ensure that he/she has safeguarded the judicial proofs that may be necessary in an eventual demand.