Different techniques are used for restoring the crown of incisor teeth, though crown placement is not always easy as, in most of the cases coronal portion is severely damaged. Loss of anatomic tooth structure such as cusps, ridges and arched roof of the pulp chamber may result in tooth tissue fracture even after final restoration. Therefore, it is important to restore the tooth with a material that provides intra coronal strengthening of tooth which, thus, protects them against fracture, preserves occlusion and esthetics.

Un certain nombre de matériaux de restauration ont inondé les marchés de temps à autre. La biocompatibilité reste une préoccupation majeure dans la sélection des futurs matériaux de restauration. Autian et ses collègues ont été parmi les premières personnes à publier une évaluation de la réponse tissulaire des matériaux dentaires dans les années 1970 et, peu à peu, le concept de biocompatibilité a été développé.Jusqu'à il y a quelques années, presque toutes les normes dentaires nationales et internationales et les programmes d'essai se concentraient entièrement sur...

Vegetable-producing operations are extremely labor intensive; throughout the activities, farm workers often adopt various postures such as bending, twisting, semi-bending, standing and sitting. which are directly associated with drudgery and occupational health problems. The present study was designed with the following objectives: to study the demographic and activity profile of farm workers engaged in a vegetable production system, postural analysis of farm workers involved in a vegetable production system, to identify the work-related health hazards experienced by the farmworkers during...