A State-of-the-Art Review on the Wear of the Occlusal Surfaces of Natural Teeth and Prosthetic Crowns

Abstract

This review focuses on the wear mechanisms of natural and restorative dental materials, presenting a comprehensive description and analysis of the works published in the last two decades on the wear at the interface of occlusal surfaces. Different groups of tribological pairs were considered: tooth-tooth, tooth-restorative material (tooth-ceramic, tooth-resin-based-materials, and tooth-metal), and restorative-restorative materials. The lack of standardization of the wear tests impairs the direct comparison of the obtained results. However, it was possible to infer about the main wear mechanisms observed on the different classes of dental materials. Concerning ceramics, their toughness and surface finishing determines the wear of antagonist tooth. Abrasion revealed to be the main wear mechanisms at occlusal interface. In the case of resin-based composites, the cohesion of the organic matrix and the nature, shape, and amount of filler particles greatly influences the dental wear. The protruding and detachment of the filler particles are the main causes of abrasion of antagonist enamel. Metallic materials induce lower wear on antagonist enamel than the other classes of materials, because of their low hardness and high ductility. Most of the studies revealed plastic deformation and adhesive wear as the main wear mechanisms. Overall, more research in this area is needed for a better understanding of the mechanisms involved at the occlusal surfaces wear. This would be essential for the development of more suitable restoration materials.

Evaluation of colour stability and surface roughness of three CAD/CAM materials (IPS e.max, Vita Enamic, and PEEK) after immersion in two beverage solutions: An in vitro study

“…The slight increase in surface roughness of IPS e.max CAD and Vita Enamic after immersion in Coca-Cola and coffee could be also attributed to the effect of acid in degrading the ceramic matrix and exposing rough surfaces [41] . This was in agreement with (Branco et al; Hussein et al) [42,33] who stated that the increase in surface roughness of ceramics was due to the dissolution of the ceramic material by the effect of acids.…”

Wear Behavior and Surface Quality of Dental Bioactive Ions-Releasing Resins Under Simulated Chewing Conditions

“…Clinical wear is a complex process involving two-and-three-body wear and is influenced by materials' composition, antagonist properties, diet, and applied force [ 15 ]. Dental materials exhibit different wear mechanisms while underwear conditions in vitro [ 30 , 31 ]. None of these standing mechanisms can completely simulate the clinical wear process [ 30 ].…”

“…Dental materials exhibit different wear mechanisms while underwear conditions in vitro [ 30 , 31 ]. None of these standing mechanisms can completely simulate the clinical wear process [ 30 ]. Consequently, a straight correlation between the clinical and in vitro wear tests remains a challenge [ 32 ].…”

Wear Behavior between Aesthetic Restorative Materials and Bovine Tooth Enamel

“…To date, a large number of existing studies have reported on the wear behaviors of these aesthetic restorative materials; however, the majority of these studies are unable to be compared directly because of different product materials, specimen morphologies, and testing and evaluation methods [ 30 , 31 ]. In particular, evidence on the wear behavior of opposite restorative materials is still a matter of debate.…”