Salivary factors associated with noncarious cervical lesions: A systematic review.

OBJECTIVE: This study aimed to carry out a systematic review of observational studies searching the association between salivary factors (amount and quality of saliva) and noncarious cervical lesions (NCCL) in individuals with permanent dentition. DESIGN: Cross-sectional, case-control, and cohort studies performed in humans with permanent dentition (population) and considering noncarious cervical lesions (outcome) in association with salivary characteristics (exposure) were included. PubMed, Web of Science, Cochrane, LILACS/BBO, Scopus, Embase, IBCT, NICE, OpenGrey, and Google Scholar were searched, with no language or date restrictions. Of 6561 potentially eligible studies, 142 were selected for full-text analysis. Three reviewers independently selected the studies, performed data extraction, and quality analysis through the Newcastle-Ottawa Scale. RESULTS: Finally, ten references were included in the review, four case-control and six cross-sectional studies. Several salivary parameters were evaluated. Some parameters were considered associated with the presence of noncarious cervical lesions: salivary buffering capacity, salivary pH, citric acid, and calcium and potassium levels. The methodological quality varied across studies, with high heterogeneity among them. CONCLUSIONS: Some associations between saliva and NCCL suggesting protective factors and others risk factors were found. However, the evidence is sparse and comes from a few studies with great heterogeneity. New scientific evidence, with standardized methods, should be encouraged. Understanding salivary parameters that influence the occurrence of NCCL is important to guide dentists in relation to etiological factors that could potentially be neglected. The results may help in the development of new and early diagnostic methods and treatments for noncarious cervical lesions.

Relationship Between Quality of Complete Dentures and User Satisfaction at 1 and 5 Years Postinsertion.

AIMS: To evaluate the effects of complete denture (CD) quality and user satisfaction on the use of CDs provided by primary care services at 1 and 5 years postinsertion. MATERIALS AND METHODS: A random sample of 233 individuals were evaluated regarding the use of maxillary and/or mandibular CDs at 1 and 5 years after insertion; at both time points, denture quality, integrity, and user satisfaction were measured. The covariates included age, gender, marital status, years of education, family income, past use of CD, time since maxillary teeth loss, mandibular ridge height, and frequency of return visits to the dentist after receiving the prostheses. The effect of the variables on the use of CDs throughout the period was estimated using logistic regression models with random effects in the intercept. RESULTS: Overall, 64.9% and 64.1% of the participants were using their CD at 1 and 5 years, respectively. Of those who used the pair of prostheses at 5 years, 86.3% reported using them in the first evaluation. Use of CDs at 1 year was greater among users with some degree of education, higher satisfaction, and those whose CD had adequate stability and free functional space. Use of CDs at 5 years was greater in satisfied users and those with a stable CD. CONCLUSION: Denture quality and user satisfaction were associated with the use of CDs after 1 and 5 years. CD use was greater in individuals who had used it for 1 year, indicating greater abandonment in the first year than in other periods.