Objetives: to determine the noise level made during odontological clinical procedures at the areas of operative dentistry, fixed prosthetics, endodontics and pediatric dentistry, at the Faculty of Dentistry at San Marcos University, Navy Medical Center and Hipolito Unanue National Hospital. Material and methods:A convenience sample of 80 sound records were registered at Dental Operatory, Fixed Prosthetic, Endodoncy, and Pediatric Dentistry clinics using a digital sound meter, which were located at ear level and at 45cm from the clinical dental procedure. Results: The highest average noise record at ear level was 83.13 decibels (dB) at dental operatory, and the lowest average noise record was 65.57 dB at endodoncy. The highest average noise record at 45 cm from de clinical dental procedure was 76.99 dB at Fixed Prosthetics, and the lowest average noise record was 61.62 dB at endodoncy. Conclusions: The sound level of dental operatory, fixed prosthetic, endodoncy, and pediatric dentistry were within the permissible limits by the Health Ministry of Peru.

Objetivos: Determinar el nivel de ruido producido durante los procedimientos clínicos odontológicos en las Áreas de Operatoria dental, Prótesis fija, Endodoncia y Odontopediatría de la Facultad de Odontología de la Universidad Nacional Mayor de San Marcos, Centro Médico Naval y Hospital Nacional Hipólito Unanue. Material y métodos: Se tomó una muestra por conveniencia de 80 registros sonoros de procedimientos clínicos odontológicos en prótesis fija, operatoria dental, odontopediatría y endodoncia usando un sonómetro digital, el cual fue colocado a nivel del oído y a una distancia de 45 cm del procedimiento clínico odontológico. Resultados: Se encontró que el mayor promedio de nivel de ruido a la altura del oído fue en operatoria dental con 83,13 decibeles(dB) y el menor fue en endodoncia con 65,57 dB. A 45 cms., el mayor promedio fue en prótesis fija con 76,99 dB y el menor fue en Endodoncia con 61,62 dB. Conclusiones: Los procedimientos clínicos odontológicos de operatoria dental, prótesis fija, endodoncia y odontopediatría se encontraron dentro de los límites permisibles sonoros del Ministerio de Salud del Perú.

Clinical evidence has shown that dental bridge (DB) misfit is more frequent than individual crown restoration misfit, and that it causes restorative failures. A comparative study of misfit profiles was performed for the most common clinical situations in mouth rehabilitation procedures with fixed restorations: gold-cast DB and porcelain metal alloy DB. Evidence from this study may lead dentists to consider the advantages and weaknesses of one structure type over the other. The results obtained showed two different profiles, with the porcelain metal alloy (PMA) DB being less predictable than the gold-cast DB. The posterior abutment restoration tends to come apart distally from the tooth structure and get closer to the mesial aspect, while keeping distal-medial separation with respect to the anterior abutment. The gold-cast DBs showed a separation pattern in which the distal end comes away from the molar and the medial end from the premolar, getting clearly closer to the faces next to the pontic: its distal aspect gets closer to the premolar and mesially to the molar. The study has also shown that even though the adaptive patterns are different, is less in PMA than in gold alloys, the latter being used only in a small percentage of clinical indications in oral rehabilitation, mainly due to aesthetic demands and high costs. The impact of this research in clinical dentistry is that PMA DBs have shown worst marginal adaptation areas where clinically, there is lack of vision or inaccessibility for appropriate dental preparation.

Ante la evidencia que los puentes odontológicos (PO) desadaptan más que las restauraciones individuales y que la desadaptación en prótesis fija es un factor determinante del fracaso, se llevó a cabo un estudio comparativo del perfil de desadaptación de los PO más utilizados en rehabilitación bucal: el PO co - lado en oro y el colado en aleación no preciosa y porcelana fundida. A partir de este, podemos trasladar al clínico las ventajas y debilidades de un tipo de estructura con respecto a la otra. Los resultados obtenidos muestran dos perfiles diferentes, presentando el PO ceramometálico un comportamiento más desordenado que el colado en oro, la restauración del pilar posterior se separa de la pieza dentaria por distal, se acerca por mesial y mantiene esta separación en distal y mesial del pilar anterior. El PO colado en oro se separa en los extremos, distal del molar y mesial del premolar y se acerca marcadamente en las caras vecinas al tramo, distal del premolar y mesial del molar. Ha quedado también demostrado que el comportamiento adaptativo, a pesar de ser diferente, es menor en las aleaciones no nobles con porcelana fundida con respecto a la aleación de oro, relegadas estas últimas, a un bajo porcentaje en su uso clínico en rehabilitación, debido a la demanda estética y los altos costos. El impacto de este trabajo en la clínica consiste en que el PO ceramometálico ha desadaptado más en las áreas donde su confección en boca es más dificultosa por su visión e inaccesibilidad.

Cochlospermum regium (Mart. & Schr.) Pilger, conhecido popularmente como "algodãozinho-do-campo", é uma planta medicinal que cresce no Cerrado brasileiro. Esta planta tem sido utilizada na medicina tradicional contra várias doenças como leucorréia, gastrites e úlceras. Esta também tem se mostrado efetiva no tratamento de doenças de pele como espinhas, furúnculos e manchas. No presente estudo, foi avaliada a antimutagenicidade do extrato aquoso de C. regium pelo Teste do Micronúcleo in vivo. Este ensaio foi realizado em eritrócitos policromáticos de camundongos machos Swiss tratados com quatro concentrações diferentes do extrato da planta (19, 38, 76 e 114 mg.kg-1 por peso corpóreo), administrado por injeção intraperitonial (i.p.) simultaneamente com ciclofosfamida (24 mg.kg-1 p.c.) ou mitomicina C (4 mg.kg-1 p.c.). A citotoxicidade foi avaliada pela razão eritrócitos policromáticos e normocromáticos (PCE/NCE). Os resultados obtidos não mostraram redução significativa da freqüência de eritrócitos policromáticos micronucleados (P > 0,05). Em conclusão, os resultados indicam que o extrato aquoso de raiz de C. regium, para as condições utilizadas, não exibiu efeito antimutagênico.

Cochlospermum regium (Mart. and Schr.) Pilger, popularly known as "algodãozinho do campo", is a medicinal plant that grows in the Cerrado of Brazil. This plant has been used in traditional medicine against various diseases such as leucorrhoea, gastritis and ulcers. It has also been effective in treating skin problems like pimples, boils and blotches. In the present study, the in vivo antimutagenicity of aqueous extract of C. regium was evaluated. The Micronucleus Test was performed in polychromatic erythrocytes from Swiss male mice treated with one of the four doses of extract of the plant (19, 38, 76 and 114 mg.kg-1 body weight), administered by intraperitonial injection (i.p.) simultaneously with cyclophosphamide (24 mg.kg-1 b.w.) or mitomycin C (4 mg.kg-1 b.w.). The cytotoxicity was evaluated by polychromatic and normochromatic erythrocytes ratio (PCE/NCE). The results showed no significant reduction of the micronucleated polychromatic erythrocytes frequency (P > 0.05). In conclusion, the data indicate that C. regium roots aqueous extract, for the conditions used, did not exhibit the antimutagenic effect.