Novedades en relación a la cementación de espigos muñones / Novelties in relation to the cementation of espigos stumps

Uno de los procedimientos clínicos más importantes dentro de la rehabilitación de una pieza tratada endodónticamente con gran destrucción coronaria es la confección del espigo muñón. En este artículo describiremos algunos pasos que el facultativo debe tener presente para realizar con éxito este procedimiento.

Cimentação adesiva: tratamento do substrato aderente / Adhesive luting process: aderent bonding treatment

Este estudo teve por objetivo uma breve revisão da literatura, abrangendo alguns aspectos relacionados aos procedimentos de "cimentação adesiva", especialmente no que se refere às técnicas de condicionamento/tratamento do substrato aderente para a otimização da união adesiva.

Avaliação in vitro da qualidade do vedamento marginal cérvico-apical de alguns agentes cimentantes utilizados na fixação do retentor intra-radicular (Cytco) / In vitro evaluation of the quality of the cervicoapical marginal sealing of some cementing agents used for the fixation of a root post (Cytco)

Os autores avaliaram neste estudo a capacidade de vedar o canal radicular com retentor intra-radicular Cytco (Maillefer), fixado com cimentos de óxido fosfato de zinco, ionômero de vidro ou policarboxilato. Observaram que nenhum dos cimentos testados foi capaz de vedar o canal radicular hermética e tridimensionalmente em toda a extensão preenchida pelo retentor intra-radicular e que, em 80 por cento dos espécimes, a infiltração marginal cérvico-apical foi superior ao comprimento do aparato protético utilizado. Analisados estatisticamente os resultados, observaram não haver diferenças significantes para x=0,05

Classification and application of cementation alternatives.

More important than any resin cement is the marginal fit and retentive nature of the ceramic restoration to be bonded. Cementation should not be intended to compensate for poor dentistry, but to assist in producing superior aesthetic results. Responding to the demand for all-ceramic restorations, dental manufacturers continue to refine the resin cements used in luting for this modality. The ideal resin cement for ceramic restorations must demonstrate low viscosity; easy loading; a film thickness which facilitates complete seating high strength; and excellent wear resistance. This article reviews the available resin cements, with particular focus on a new type of initiator and stabilizer for light- and dual-cured resin cements.

Poor reproducibility in radiographic grading of femoral cementing technique in total hip arthroplasty.

The first study of the reproducibility of a widely accepted grading system for femoral cementation in total hip arthroplasty is reported. Sixty postoperative radiographs were graded on two occasions at least 2 weeks apart by two experienced observers. The test-retest reproducibility rate was 60% for observer 1 and 70% for observer 2. The interobserver reproducibility varied between 60 and 63% for the different assessments. Between 5 and 6% of cases differed by more than one grade between tests. Kappa statistical analysis confirmed that reproducibility was poor in all cases. This cement grading system, even in the hands of experienced observers, has too high a rate of intraobserver and interobserver error to recommend its use.