Recent research has emphasized the relationships between environmental and individual factors that may influence population oral health and lead to health inequalities. However, little is known about the effect of interactions between environmental and individual factors on inequalities in clinical (e.g., decayed teeth) and subjective oral health outcomes (e.g., oral health–related quality of life [OHQoL]). This cohort study aimed to explore the direct and mediated longitudinal interrelationships between key environmental and individual factors on clinical and subjective oral health outcomes in adults. Self-reported measures of OHQoL and individual (sense of coherence [SOC], social support, stress, oral health beliefs, dental behaviors, and subjective socioeconomic status [SES]) and environmental factors (SES and social network) were collected at baseline and 3-mo follow-up, together with a baseline clinical examination of 495 adult employees of an automobile parts manufacturer in India. Lagged structural equation modeling was guided by the adapted Wilson and Cleary/Brunner and Marmot model linking clinical, individual, and environmental variables to quality of life. The study provides tentative evidence that SES may influence levels of resources such as social support and SOC, which mediate stress and in turn may influence subjective oral health outcomes. Accordingly, the present findings and the adapted Wilson and Cleary/Brunner and Marmot model on which they are predicted provide support for the psychosocial pathway being key in the SES–oral health relationship. The pathways through which environmental factors interact with individual factors to impact subjective oral health outcomes identified here may bring opportunities for more targeted oral health promotion strategies.

Introduction: Accurate age data are always necessary in medicine and dentistry, and are also important to assess maturity and estimate age in a number of disciplines, such as forensic odontology, paediatric and preventive dentistry, orthodontics, etc. Aim: This investigation determines the accuracy of dental age estimation and its comparison with chronological age by two methods: Demirjian's and Willems’. Materials and methods: Tooth development was assessed in seven left mandibular teeth from 215 orthopantomograms (OPGs) belonging to healthy children aged 6–15 years selected by convenience sampling, from patients of the Sudha Rustagi College of Dental Sciences & Research, Faridabad, and were staged according to Demirjian's and Willems’ scales. The statistical analysis was performed using the unpaired ‘ t’-test and the correlation was analysed using Karl Pearson's correlation coefficients test. Results: Overall, Willems’ method was found to be more accurate with a mean age overestimation of 0.36 years (SD = 0.38) in boys and 0.24 years (SD = 0.36) in girls, and Demirjian's method produced a mean overestimation of 0.66 years (SD = 0.41) in boys and 0.56 years (SD = 0.43) in girls, respectively. Also, correlation between the two methods revealed a high coefficient value, 0.9947 for boys and 0.9944 for girls ( P < 0.05). Conclusion: Despite the favourable result of Willems’ method in comparison with Demirjian's method, this study demonstrated a high correlation coefficient between both chronological and obtained dental age, thus confirming their potential applicability in clinical practice and forensic dentistry.

Despite growing knowledge of the adverse effects of cigarette smoking on general health, smoking is one of the most widely prevalent addictions around the world. Globally, about 1.1 billion smokers and over 8 million people die each year because of cigarette smoking. Smoking acts as a source for a variety of oral and systemic diseases. Various periodontal issues such as increased pocket depth, loss of alveolar bone, tooth mobility, oral lesions, ulcerations, halitosis, and stained teeth are more common among smokers. This systematic review was conducted according to the guidelines from PRISMA, and research articles were retrieved from the Web database sources on 31 May 2021. The quality of research articles was ensured by the type of evidence from combined schema incorporating as schema-13 evidence type description, Cochrane health promotion and public health field (CHPPHF), and the health gains notation framework-14 screening question for quality assessment of qualitative and quantitative studies. Smokers have been found to have bleeding on probing, periodontal pockets, and clinical attachment loss compared to nonsmokers. Oral and respiratory cancers are among the most lethal known diseases caused by cigarette smoking and other commonly occurring sequelae such as stained teeth, periodontal diseases, etc.

This systematic review’s objective was to conduct a complete analysis of the literature on the root canal morphology using advanced micro-computed tomography. The electronic web databases PubMed, Scopus, and Cochrane were examined for research papers concerning the chosen keywords, evaluating the root canal morphology using Micro-CT, published up to 2021. The articles were searched using MeSH keywords and searched digitally on four specialty journal websites. DARE2 extended (Database of Attributes of Reviews of Effects) was used to assess bias risk. The information was gathered from 18 published studies that strictly met the criteria for inclusion. In the included studies, a total of 6696 samples were studied. The studies were conducted on either maxillary (n-2222) or mandibular teeth (n-3760), permanent anteriors (n-625), and Third molars (n-89). To scan samples, a Scanco Medical machine in was used in 10 studies, Bruker Micro-CT in 34, and seven other machines were utilized in the rest. Bruker Micro-CT software from Kontich, Belgium, VG-Studio Max 2.2 software from Volume Graphics, Heidelberg, Germany, was the most commonly used software. The minimum Voxel size (resolution) adopted in the included studies was 11.6 µm. However, 60 µm was the maximum. Most studies classified the root canal morphology using Vertucci’s classification system (n-16) and the four-digit system (n-6).

The dental erosion or decalcification of enamel is a significant clinical problem. Apple acidic beverages are thought to increase the potential for dental erosion. The purpose of this in vitro study was to investigate the effect of clove essential oil (CEO) and its active principles on tooth decalcification of apple juices. On GC-MS analysis, CEO showed a high content of eugenol (58.29%) and eugenyl acetate (19.10%). Teeth specimens were randomly divided into 5 treatment groups: control, CEO, eugenol, eugenyl-acetate, and fluoride. The specimens were exposed for 24h and were analyzed for calcium contents using Inductively Coupled Plasma with Optical Emission Spectroscopy (ICP-OES). Data were analyzed using student t-test (𝑃<0.05). CEO, eugenol, and eugenyl-acetate significantly decreased the decalcification of tooth by the apple juice to only 17, 24, and 21mgL1, respectively. Hemolytic activity on human erythrocytes was studied to exclude the possibility of further associated cytotoxicity. It was observed that the CEO and its two lead molecules inhibit the decalcification and/or promote the remineralization caused by the apple juices. The effect of the test compounds appears to be distinct like that of fluoride treatment. CEO may, therefore, serve to be a promising adjunct to fluoride in the treatment of root caries during minimally invasive therapy.