Cervical column posture and airway dimensions in clinical bruxist adults: a preliminary study.

The aim of this study was to compare the cervical column posture and the upper airway dimensions between sleep bruxist and non-bruxist young adults. Twenty-three sleep-grinders and 22 asymptomatic subjects, selected according to the American Academy of Sleep Medicine (AASM) criteria (report by a sleep partner and the presence of dental wear, according to Wetselaar et al.), were evaluated. The mean age was 23·8 years (range 18-30). All the subjects had complete permanent dentition and skeletal and occlusal class I. A digital cephalometric radiograph with natural head posture was performed for each subject. The craniocervical posture was traced and evaluated according to Solow and Tallgren, and the airway dimensions of the oropharynx and nasopharynx were evaluated in agreement with Sayinsu. The data were analysed with independent-samples t-tests and Mann-Whitney U-test. Significance was set at P < 0·05. Sleep bruxist young adults presented more forwarded cervical column posture and narrower measures of the oropharynx, when compared with controls (P < 0·05). As in children, anterior cervical column posture was found to be associated with sleep bruxism.

La fotopolimerización en 2002 / Photopolymeration at year 2002

Debido a la reciente aparición de nuevas lámparas de fotopolimerización de alta intensidad y teniendo en cuenta los factores que influyen y los parámetros que determinan la eficacia de la polimerización se discute sobre los distintos tipos de lámparas. Los resultados obtenidos son inferiores en los de alta intensidad (arco de plasma y láser) a los valorados con lámparas halógenas. En cuanto a su evolución las LED son las mejor valoradas por sus ergonómicas ventajas (AU)

Due to the recent appearance of new lamps of photopolymerization of high intensity and considering the factors that influence and the parameters that determine the effectiveness of the curing it discusses on the different types from lamps. We've made a review of advantages and disadvantages for each light technology. We explain the main factors wich take importance in these procedures.The obtained results are poorer in those of high intensity (are of plasma and laser) to the valued ones with halogenous lamps. As far as their evolution the LED could be the right choice because of their ergonomic advantages. We expect a future with total compatibility between dental curing materials and lamps (AU)

[Magnetic materials in dentistry]. / Materiales magnéticos en odontoestomatología.

In the last 40 years, magnets have been used in dentistry. Initially as anecdotic reports, but recently, after the development of powerful rare earth magnets, new applications of them have arised and offer a clinically proved alternative to mechanical systems. Many experimental and clinical trials have demonstrated their adequate use in prosthetic rehabilitations, partial removable or overdentures, tooth or implant beared, or in other like orthodontics. The authors describe the historical evolution of magnetic systems used in dentistry, their physical and mechanical principles, their attributes as biomaterials and their designs and way of use.