Extinct species of Malleodectes gen. nov. from Middle to Late Miocene deposits of the Riversleigh World Heritage Area, northwestern Queensland, Australia are enigmatic, highly specialized, probably snail-eating marsupials. Dentally, they closely resemble a bizarre group of living heterodont, wet forest scincid lizards from Australia (Cyclodomorphus) that may well have outcompeted them as snail-...

Objective: To assess the gingival health status among preclinical and clinical Yemeni dental students. Materials and Methods: This cross-sectional study was conducted on preclinical and clinical students at Thamar University. The self-reported oral health behavior of dental students with their actual gingival status was evaluated. One hundred and ninety five volunteers (115 male and 80 females ...

Many factors influence the oral health status of cats and dogs. The present study aimed to elucidate the influence of feeding home-prepared (HP) food v. commercial pet food on oral health parameters in these animals and to investigate the effect of home oral hygiene on oral health. The study surveyed 17,184 dogs and 6371 cats visiting over 700 Polish veterinary surgeries in 2006-7 during a Pet ...

BACKGROUND AND OBJECTIVE Dental calculus occurs as a consequence of supersaturation of saliva with respect to calcium phosphates. This mineralization of dental plaque can be delayed by the presence of crystallization inhibitors, such as pyrophosphate or bisphosphonates. Phytate inhibits brushite and hydroxyapatite crystallization and has the potential to prevent dental calculi formation. The ai...

Epidemiological studies have implicated dental calculus as an ideal substrate for subgingival microbial colonization. Therefore, the main objective of periodontal therapy is to eliminate the microbial biofilm along with the calculus deposits from the root surface by root surface debridement. Over the past years, a large number of clinical and laboratory studies have been conducted to evaluate t...

Objective:The aim of this studywas to characterize the structure of normal and inflammed pulpal connective tissue on samples of human dental pulp and recently extracted teeth. Materials andMethods:Morphological and histochemical stainingmethodswere used in order to reveal the particular cell types and fibers present in dental pulp, in normal and inflammatory conditions. Results: In the patholog...

Litokoala is revised on the basis of new material from the early to middle Miocene deposits of Riversleigh. A new species of Litokoala is described from the System B Outasite Local Fauna. Litokoala garyjohnstoni sp. nov. possesses a unique combination of both plesiomorphic and apomorphic dental features, making its phylogenetic position within Litokoala difficult to interpret. In some aspects o...

Few studies have evaluated the oral effects of smokeless tobacco use in adolescents. This study described the oral health status of adolescents who were daily users of local smokeless tobacco (shamma) in Saudi Arabia. A convenience sample of 270 middle-school male students completed a questionnaire and received an oral examination and a saliva cotinine test. Among the students, 96% had plaque d...

Archaeologists have long recognized the problem of the ‘‘old wood’’ effect in radiocarbon dating charcoal and wood samples, the age of which may be hundreds of years older than their use by humans. Such problems have resulted in significant changes in how most researchers select wood and charcoal samples for C dating, with many now using relatively short-lived carbonized materials for dating. D...