This study evaluated the effects of the photoactivation source and restorative material on the development of caries-like lesions on human enamel after an in vitro pH challenge. Enamel cavities were prepared in 36 blocks, which were assigned to two groups according to the restorative material: resin-modified glass ionomer (RMGI) and composite resin (CR). Samples were exposed to quartz-tungsten-...

Background: Compomers remain the material of choice for restoration of primary teeth as they combine the best of GIC and composites. However, as it is a resinous material, attention is focused on polymerization shrinkage causing gaps at restoration cavity interface. Gaps represent decreased efficacy of adaptation. Aim: To evaluate the marginal adaptation of compomers (Dyract, Compoglass, and F-...

A model was used to investigate stresses and deflections in cement bases and in a composite restorative material induced in a posterior Class I restoration. Deflections in the composite were highest when it was supported by a base with a low modulus; however, the maximum tensile stress (12 MN/meter2) occurring in the composite restoration at the interface with the base was well below the maximu...

The history of pins in molars is back in 1839-1855. Their use is mainly in the restoration of large cavities first with amalgam and then with esthetic resin materials. Between 1958-2008 for a period of 50 years only 70 publications appear which are related to the topic. This is due to the difficulties in the clinical and non clinical research on pins. The articles focused on class II cavities a...

Aesthetic materials have always been a priority for the restoration of anterior teeth; increasingly, they have also gained prominence in the restoration of posterior teeth. This has been due to their advantages as an alternative to amalgam. Their drawbacks however, can include poor marginal adaptation, postoperative sensitivity and cuspal movement. These are particularly associated with the pol...

In many respects, we take the age of things for granted. Age is assumed to be an inherent quality, dictated by the time a thing has been in existence and put to use. Many of us have even developed an appreciation for the wear associated with age. The worn leather covers of old books, their mottled pages and the creases along their spines are all considered, in some circles at least, to be signs...

The longevity of dental restorations is largely dependent on the continuity at the interface between the restorative material and adjacent tooth structure (the restoration margin). Clinical decisions on restoration repair or replacement are usually based upon the weakest point along that margin interface. Physical properties of a restorative material, such as polymerisation shrinkage, water sor...

For restoration purposes, nature conservation generally enforces the use of local seed material based on the "local-is-best" (LIB) approach. However, in some cases recommendations to refrain from this approach have been made. Here we test if a common widespread species with no obvious signs of local adaptation may be a candidate species for abandoning LIB during restoration. Using 10 microsatel...

Root perforations are significant complications of endodontic treatment. However, when teeth are of strategic value, perforation repair is clearly indicated. The successful utilization and placement of a subgingival resin-ionomer restoration to repair an endodontic root perforation is demonstrated. Sustained tissue health and minimal probing depths at the surgical site demonstrate clinical succ...

Dental clinicians have an expanding range of biomaterial choices for restoring tooth structure. Scientific developments in cariology, advances in dental biomaterials, and patients' esthetic concerns have led to a reduction in amalgam restorations and an increase in composite restorations. The aim of this study was to compare teaching time with students' clinical procedures in amalgam and compos...