Fátima Maria Namen

Soft Chelating Irrigation Protocol Optimizes Bonding Quality of Resilon/Epiphany Root Fillings

This study was designed to test the impact of either a strong (MTAD) or a soft (1-hydroxyethylidene-1, 1-bisphosphonate [HEPB]) chelating solution on the bond strength of Resilon/Epiphany root fillings. Both 17% EDTA and the omission of a chelator in the irrigation protocol were used as reference treatments. Forty extracted human upper lateral incisors were prepared using different irrigation protocols (n = 10): G1: NaOCl, G2: NaOCl + 17% EDTA, G3: NaOCl + BioPure MTAD (Dentsply/Tulsa, Tulsa, OK), and G4: NaOCl + 18% HEPB. The teeth were obturated and then prepared for micropush-out assessment using root slices of 1 mm thickness. Loading was performed on a universal testing machine at a speed of 0.5 mm/min. One-way analysis of variance and Tukey multiple comparisons were used to compare the results among the experimental groups. EDTA- and MTAD-treated samples revealed intermediate bond strength (0.3-3.6 MPa). The lowest bond strengths were achieved in NaOCl-treated samples (0.3-1.2 MPa, p < 0.05). The highest bond strength was reached in the HEBP-treated samples (3.1-6.1 MPa, p < 0.05). Under the present in vitro conditions, the soft chelating irrigation protocol (18% HEBP) optimized the bonding quality of Resilon/Epiphany (Resilon Research LLC, Madison, CT) root fillings.

Reduced Long-term Sealing Ability of Adhesive Root Fillings after Water-storage Stress

This study was designed to compare in vitro the short-term and long-term ability to prevent through-and-through fluid movement along Resilon/Epiphany root fillings. A sample of 40 human upper incisors were prepared and assigned to experimental groups of 20 teeth each, designated as G1, Resilon/Epiphany, and G2, gutta-percha/AH Plus. Additional 10 teeth were used as controls. Each tooth was assembled in a hermetic cell to allow the evaluation of fluid filtration. After the root filling procedures, the filled roots were stored at 37 degrees C and 100% humidity for 7 days to allow setting of the sealer. Forthwith, the teeth were submitted to the first fluid flow measurement. Leakage was measured by the movement of an air bubble traveling within a pipette connected to the teeth. Shortly after the measurements, the teeth were detached from the hermetic cell and then stored in water for 14 months at 37 degrees C. At this moment, fluid filtration was re-measured. Both Kruskal-Wallis and Wilcoxon signed rank tests were applied to detect differences between the experimental groups. No differences were found between the experimental groups during the immediate measure (P > .05), whereas Resilon/Epiphany group displayed significantly more fluid movement than the gutta-percha/AH Plus group after 14 months of water storage (P < .05). The water-storage stress had no significant effect on the sealing ability of the gutta-percha/AH Plus root fillings (P > .05). The main point of our study is the fact that long-term sealing was compromised in the Resilon/Epiphany samples, when exposed to long-term water storage.

Avaliação da existência de controle de infecção oral nos pacientes internados em hospitais do estado do Rio de Janeiro

The aim of the present study is to ascertain whether an oral infection control protocol is being used in Rio de Janeiro State hospitals. Sixty two hospitals, both public and private have been surveyed. When asked whether any procedure was being adopted with admitted patients (in case of ICU patients), 39% of the hospitals responded positively. Among all institutions surveyed, only 15% conduct a regular plaque control protocol in admitted patients. Studies have shown that there is an inter-relationship between periodontal disease and systemic diseases, such as cardiovascular disease, osteoporosis, preterm births and low birthweight, diabetes and respiratory diseases. The oral cavity is considered a potent reservoir of respiratory pathogens. Based on these findings, it has become evident that oral hygiene is an important means of preventing a number of diseases. Thus the need arises not only to create an oral cavity infection control protocol that will contribute to reduce mortality in admitted patients but also to propose preventive measures towards this end.

Surface energy and wettability of polymers light-cured by two different systems

Objectives This study evaluated the surface energy and wettability of composite resins polymerized by different light-curing units to ascertain the good wetting of tooth surfaces to achieve adhesion. Material and Method Filtek Z350 (3M ESPE), Admira (VOCO) and Grandio (VOCO) resins were selected for the testing procedures. The resins were light cured using LED and Halogen devices. Contact angles were measured goniometrically (Ramé-Hart F100) using water and glycerol as test liquids. Surface energy values were calculated with a software program (DROPimage Standard) that uses the harmonic mean method applied to the acid-base theory. The data were analyzed statistically by ANOVA and Tukeys test with a significance of 0.05. Results and Conclusions No statistically significant differences were found between the values of surface energy. The measured wettability differed statistically in most combinations as a function of the type of composite resin, type of light-curing unit, and the test liquid.

Reflexões sobre a educação de profissionais da área de saúde

O objetivo do presente ensaio e o levantamento de polemicas sobre a educacao como um todo e o conhecimento cientifico como alicerces importantes na formacao academica. Acreditando que a busca incessante dos cursos de pos-graduacao nao se deveria restringir as teses como mera formalizacao, questiona-se a dinâmica metodologica do conhecimento, bem como verdade e saber. A condicao humana e introduzida como um tema que faz um vies com a era dita pos-moderna, discutindo a liquidez e efemeridades humanas. A complexidade e interdisciplinaridade foram questionadas como um novo formato de trabalho. A abordagem da pesquisa qualitativa correlaciona-se com a questao humana e existencial. Alem de outros topicos a respeito de educacao e pesquisa tais como bioetica, viabilidade da pesquisa desinteressada, producao massificante e teses bem direcionadas, quisemos mostrar o quanto o processo de educacao e conhecimento podem formar eventos para que o aluno se torne sujeito, um individuo com autocritica e com postura dialetica.

Controle de infecção oral em pacientes internados: uma abordagem direcionada aos médicos intensivistas e cardiologistas

This paper aims to find the current level of periodontal med-care knowledge, as well as the possible existence of some oral infection control protocol regarding hospitalized patients. Our sample gathered 110 cardiologists and intensive care units doctors selected from medical teams of five Rio de Janeiro hospitals. Preliminary numbers: 75.4% said to have heard something about Periodontal Medicine, although only 30% out of this group admitted to have read something concerning such subject. On the other side, only 2.7% of the sample informed to do consistent information searching along their patients anamnese, while 58.2% out of this group admitted such procedure conditional to the patients general state at the due moment. Through such numbers, we tend to come up to the conclusion that, be it either through direct or indirect Periodontal Medicine technical information (and consequently with regards to the absolut importance of preservation and control of oral biofilm and its impact on ones systemic health), the matter has been dimly spread among medical groups. The search also revealed the probability that Rio de Janeiro hospitals lack either units or agents designed for prevention and control of oral infection; consequently, such organizations do not have any kind of protocols, reliable or not, concerned to oral infections.