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Current Status and Role of Dental Polymeric Restorative Materials
Published in Mary Anne S. Melo, Designing Bioactive Polymeric Materials for Restorative Dentistry, 2020
Haohao Wang, Suping Wang, Xuedong Zhou, Jiyao Li, Libang He, Lei Cheng
Dental caries is known as the destruction of dental hard tissues by acidic by-products from bacterial metabolism of dietary carbohydrates (Selwitz et al. 2007). Despite the great efforts in caries prevention, it is still one significant public health problem globally, and dental restorations are the most commonly used approach to restore decayed teeth (Selwitz et al. 2007). Apart from that, restorations also play an essential role in clinical treatment, including tooth wear, dental trauma, and esthetic purposes. Although all kinds of restorative materials emerge in an endless stream, there are generally two common categories of restorative dental materials: direct and indirect materials, both have their specific indications for clinical use (AFFAIRS ACOS 2003). The former category includes most commonly used filling materials like amalgam, resin composites, glass ionomer cement (GIC), etc., which are placed directly into a tooth cavity and shaped intraorally. The indirect restorations are fabricated outside of the mouth via dental impressions of a prepared tooth, such as crowns, inlays and onlays, bridgework, and veneers (Loomans and Özcan 2016).
Oral health of the prehistoric Rima Rau cave burials, Atiu, Cook Islands
Published in Journal of the Royal Society of New Zealand, 2020
Angela L. Clark, Christina Stantis, Hallie R. Buckley, Nancy Tayles
Antemortem tooth loss can be the final consequence of most dental diseases. Within prehistoric Polynesia, the frequency of AMTL ranges from 3.3% (Hane dune) to 9.6% (Honokahua), with the AMTL frequency of 7.7% in the Rima Rau sample, within the range. Stantis (2015) attributes the 6.3% AMTL frequency at ‘Atele to dental trauma resulting from the consumption of marine foods (such as shellfish) indicated by high nitrogen isotope values. The frequency of enamel chipping at ‘Atele was 17.3%, which is similar to Rima Rau at 21.2%. Although nitrogen isotopic values are unavailable for the Rima Rau sample, marine foods would have formed a substantial part of the diet, resulting in dental trauma and ultimately tooth loss as observed in prehistoric Tonga. At Rima Rau, the partial remodelling of the alveoli in the majority of tooth sockets observed with AMTL suggests tooth loss was recently before death.
Fracture resistance of simulated immature teeth treated with a regenerative endodontic protocol
Published in Acta Biomaterialia Odontologica Scandinavica, 2019
Mohamed Raouf W. Ali, Manal Mustafa, Asgeir Bårdsen, Athanasia Bletsa
The experiment model in this study emphasizes the immediate effect of the TSCs on treated immature teeth with REPs. We implemented a continuously increasing load of force model to measure fracture resistance. Traumatic dental injuries involve mostly anterior teeth [2]. The absence of high occlusal forces at the incisors may imply that the type of force that leads to dental trauma in such cases is a single impact that overwhelms the structural integrity of the tooth at that moment. Untreated immature bovine teeth had a higher fracture resistance than immature bovine teeth treated with TSCs therefore, the null hypothesis was rejected. Under the experimental set-up, the treated immature teeth fractured at the cervical area and thus, REP and cervical seal with bioceramic materials does not seem to reinforce fracture resistance of bovine teeth.