This study aimed to assess the fracture resistance and fracture patterns of endodontically treated permanent mandibular molars restored with either preheated or nonpreheated conventional composite resin or short fiber-reinforced composite resin (SFRC). One hundred and twenty mandibular molars with prepared mesio-occluso-distal (MOD) cavities were allocated to six groups: positive control (intact teeth, no restoration, n = 20), negative control (endodontically treated but unrestored, n = 20), and four experimental groups restored with conventional composite, preheated composite, SFRC, or preheated SFRC (n = 20 each). After thermocycling, fracture resistance was tested using a universal testing machine at 0.5 mm/min. Data were analyzed using Jamovi software (Version 2.4.8; The Jamovi Project, Sydney, Australia). Normality was assessed with the Kolmogorov–Smirnov test. Group differences were evaluated using the Kruskal–Wallis test followed by the Dwass–Steel–Critchlow–Fligner post hoc test. The association between fracture modes and fracture strength categories was examined using the chi-square test of independence. A p-value < 0.05 was considered statistically significant. The positive control showed significantly greater fracture strength than all restored groups (p < 0.05). All restored groups had significantly higher fracture resistance than the negative control (p < 0.05), with no significant differences among the restored groups (p > 0.05). A significant association was found between fracture mode and fracture strength (χ²(1) = 6.97, p = 0.008). The preheated SFRC group showed a higher rate of restorable fractures compared to others, suggesting improved clinical reparability with preheating.

Objective: To examine the effects of six whitening mouthwashes on tooth color and immediate bond strength to the enamel.Materials and Methods: Human incisors were divided into seven groups (n = 10) according to mouthwashes (R.O.C.S Black Edition White, Splat White Plus, Colgate Plax White Charcoal, Signal White Now, Listerine Advanced White, Colgate Optic White, and distilled water). After the initial color measurements, the teeth were exposed to mouthwash for 4 weeks. Then, the color measurements were repeated. Then, cylindrical composite resin blocks were immediately applied to the enamel surfaces and subjected to shear bond strength tests. Data were analyzed using Kruskal‐Wallis and Bonferroni tests (α = 0.05).Results: Δ𝑏, Δ𝐿, and ΔE ₀₀ values did not present significant differences among the groups. Significant differences among the groups were determined for Δ𝑎 and ΔWI _D values (p < 0.05). R.O.C.S Black Edition White and Splat White Plus produced clinically acceptable color changes. Signal White Now, Splat White Plus, and Listerine Advanced White created acceptable whiteness changes. The mouthwashes did not statistically affect the bond strength compared to the distilled water (p > 0.05).Conclusions: Whitening mouthwash containing blue covarine revealed more acceptable color and whitening changes. Mouthwash containing charcoal led to the lowest enamel bond strength values.Clinical Significance: The content of whitening mouthwashes affected the degree of tooth whitening and shear bond strength to enamel.

Bone mineral density (BMD) is related to oral health. This study investigated how changes in BMD influence tooth loss risk and dental caries prevalence. This cross-sectional observational study included 224 people (199 males and 25 females). The BMD scores of the participants’ lumbar spine, femoral neck, and total hip were categorized as normal, osteopenia, or osteoporosis. Oral health was assessed using the Decayed, Missing, Filled Teeth (DMFT) index and Oral Hygiene Index-Simplified (OHI-S) scores. Based on the number of surviving teeth, the participants were categorized into low (< 20) and high (≥ 20) groups. Differences between groups were assessed using independent sample T tests and one-way analysis of variance. The normal, osteopenia, and osteoporosis groups comprised 72, 87, and 65 participants, respectively. The OHI-S scores showed no notable variations across the groups. The DMFT index scores were highest (18.69) in the osteoporosis group and lowest (14.08) in the normal group (p < 0.001). Although the number of remaining teeth was lower in the osteoporosis and osteopenia groups compared to the normal group (p < 0.001), that in the osteopenia group approximated the normal group, but was substantially higher than in the osteoporosis group. The group with the lowest number of remaining teeth had lower total hip T-scores, despite significantly higher DMFT indexes (p < 0.001). Tooth loss and dental decay rates were significantly high in patients with osteoporosis. Although bone resorption during osteopenia is not excessive, it constitutes a crucial risk factor for dental health. Therefore, attention must be paid to bone resorption treatment in patients with osteopenia.

The aim of this study was to investigate the effects of diet, oral hygiene, visits to the dentist, and body mass index (BMI) on the risk of dental decay. 240 patients aged 18–50 were included in the study. Participants completed a questionnaire that included demographic information and oral hygiene habits. They were also required to submit dietary analysis forms, which asked about the foods and amounts consumed at breakfast, lunch, dinner, and during two snacks. Intraoral and radiographic examinations of the patients were performed, and the values for DMFT, plaque index, dental calculus index, and oral hygiene index (OHI-S) were recorded. Statistical analysis, including Chi-square tests, independent samples t-tests, and one-way ANOVA, was conducted on the data (p < 0.05). The oral hygiene index(OHI-S) was determined to be good in 58.3% of the study participants and poor in 10%. No statistical difference was found between BMI and DMFT index (p > 0,005). When the relationship between food consumption frequencies and DMFT was evaluated, it was determined that there was no statistically significant relationship between bread, rice, milk, legumes, and DMFT values (p > 0,005), but there was a statistically significant relationship between fruit, vegetables, yoghurt, cheese, meat/chicken/fish, eggs, honey, sugar, glutens, acidic drinks, tae/coffee consumption and DMFT indices (p < 0,005 ). The types of food consumed by patients and the frequency of consumption affect the risk of caries.

Aims: This prospective cross-sectional study aimed to compare the decayed, missing, filled teeth (DMFT) index values and dental caries prevalence of patients with type 2 diabetes mellitus (T2DM) to those of healthy individuals, and to examine the effect of inadequate glycemic control on DMFT and caries prevalence. Methods: T2DM patients were divided into two groups based on metabolic control: well-controlled (WC; HbA1c ≤7%) and poorly controlled (PC; HbA1c >7%). The clinical parameters assessed were the number of natural teeth, the coronal DMFT index, the simplified oral hygiene index (OHI-S), and body-mass index (BMI). Results: The DMFT index and number of filled teeth were similar between the WC and healthy control groups. In contrast, the PC group showed significantly higher values than both the WC and control groups. The highest DMFT index (14.38) was observed in the PC group, and the lowest (9.90) in the control group (p