No abstract

This study evaluated the microshear bond strength (µSBS) of resin composite to primary dentin using a universal adhesive in etchand-rinse mode or self-etch mode. Flat ground dentin surfaces were created on forty extracted human primary incisors and randomly assigned into four groups (n=10): Adper Single Bond II (ASB), Clearfil SE Bond (CSE), Single Bond Universal etch-and-rinse (SBU-ER) and Single Bond Universal self-etch (SBU-SE). Adhesive was applied on the dentin surface, which was subsequently bonded with a resin composite. The µSBS test was performed using a universal testing machine at a crosshead speed of 1 mm/min. The ASB group generated a lower mean µSBS (19.1±3.4 MPa) than those of the other groups [SBU-ER (24.3±2.7 MPa), SBU-SE (25.1±2.4 MPa), and CSE (25.3±2.7 MPa)]. Adhesive failure was the most common failure mode in each group. In conclusion, SBU used in etch-and-rinse or self-etch mode resulted in similar bond strength to primary dentin.

Within the limit of this study, after MTA apexification, intraradicular reinforcement with MTA, fiber post, or composite resin increased the fracture resistance of simulated immature teeth.

Due to deeper level of GIC remineralization, the refractive index of the GIC applied enamel might be closer to sound enamel. Hence, GIC is recommended for remineralization of anterior teeth. SDF staining makes it unsuitable for use in anterior teeth; thus, it is reserved for use in posterior teeth.

Aim To investigate the factors association with dental caries experience in the primary dentition of Thai preschool children with cerebral palsy. Methods and results A cross‐sectional study was conducted among sixty Thai preschool children with cerebral palsy, aged 3–6 years old. Caries experience was determined by identifying decayednon‐cavitated and cavitated lesion, missing, and filled surfaces of deciduous teeth(dmfs). Sociodemographic data, CP motor types, dietary habits, oral health behaviors and dental plaque index were collected. Multiple linear regression analysis was carried out to identify the strength of the association between factors and dental caries experience. The prevalence of dental caries was 91.66%. The average dmfs was 20.30 ± 21.63 surfaces/individual. The multiple linear regression indicated that dmfs was significantly associated with snacking carbohydrate between meals more than two times/day (β ± SE = 0.372 ± 0.125; p = 0.004), spastic type of cerebral palsy (β ± SE = 0.309 ± 0.124; p = 0.015) and one‐time daily tooth brushing (β ± SE = 0.306 ± 0.124; p = 0.017). Conclusions Nine out of 10 preschool children with CP experienced dental caries. Spastic type of CP had more risk to develop dental decay. Caries prevention for preschool children with CP should emphasis on controlling the frequency of carbohydrate snack no more than two times/day and reinforcing tooth brushing at least twice daily.