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Purpose: To investigate the effect of coffee stain and whitening systems on the color stability of CAD/CAM glazed lithium disilicate glass-ceramics (LDGCs). Methods:  68 glazed LDGC discs (12 × 10 × 2 mm) were fabricated using blocks of CAD/CAM systems (IPS e.max CAD ceramic). Baseline color was measured (CIE/L*a*b*), and specimens were randomized into four groups (n = 17). All specimens were stained (coffee solution; 24 h/d × 12) and then subjected to two whitening protocols. G1- (kept moist × 7 days); G2-positive control (brushed with distilled water, 200gm/load, 2 min twice daily × 7 days); G3- whitening toothpaste (Colgate optic white; relative dentin abrasivity = 100, 200gm/load, 2 min twice daily × 7 days) and G4-simulated at-home bleaching protocol (Opalescence,15% carbamide peroxide (CP), 6 h/day × 7 days). The study outcome was color change (ΔE) measured at baseline, after staining, and after whitening treatments. Data were analyzed using paired T-test and one-way ANOVA (α = 0.05). Results: All groups stained equally (p > 0.05) but were not clinically significant (ΔE ≤ 1.05). Stains were significantly (p ≤ 0.01) improved in G2 and G3 (ΔE = 0.69 and 0.63), yet were not eliminated compared to bleaching, which had the highest color improvement and completely removed the stains (ΔE = 0.72). Conclusions: Glazed LDGC was color stable after simulating one year of coffee staining. Bleaching, using 15% CP for a week, completely removed the stains and returned the LDGCs to their original shade. However, simulating eight months of brushing, regardless of the toothpaste content, improved the color outcome but didn't remove it completely.

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OBJECTIVES: To investigate the effects of a coffee beverage and two whitening systems on the surface roughness and gloss of glazed Lithium Disilicate Glass-Ceramics (LDGC) for computer-aided design/computer-aided manufacturing (CAD/CAM) systems. METHODS: Sixty-eight LDGC disks (12 × 10 × 2 mm) were prepared from blocks of CAD/CAM systems (IPS e.max CAD ceramic). Baseline measurements for surface roughness (Ra) and gloss (GU) were taken using a 3-D optical profilometer and a glossmeter, respectively; then specimens were randomized into four groups (n = 17). All specimens were immersed in a coffee solution (24 h × 12 days) then subjected to two whitening systems. G1-negative control (kept moist × 7 days); G2-positive control (brushed with distilled water, 200 g/load, 2 min twice daily × 7 days); G3-whitening toothpaste (Colgate optic white; relative dentin abrasivity (RDA) = 100, 200 g/load, 2 min twice daily × 7 days); and G4-simulated at-home bleaching protocol (Opalescence,15% carbamide peroxide (CP), 6 h/day × 7 days). The study outcomes were measured at baseline and after the treatments. Data were analyzed using paired T-test and one-way ANOVA (α = 0.05). RESULTS: The mean surface roughness significantly increased (p ⩽ 0.002) for all groups after the designated treatment protocols. Among groups, the mean surface roughness of G2 and G3 were significantly higher (p ⩽ 0.001) (Ra: 0.51 and 0.57 µm, respectively) compared to the control group (Ra: 0.23 µm), and were not significantly different from G4 (Ra: 0.46 µm). Surface gloss decreased with no significant change within or among groups after treatment. CONCLUSION: All glazed LDGC had a significant increase in surface roughness after being subjected to simulated 1 year of coffee drinking and whitening systems (15% CP and whitening toothpaste), and the greatest change was associated with brushing (simulating 8 months). However, coffee beverages and whitening systems had no significant effect on the surface gloss.

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OBJECTIVES: Missing teeth are routinely replaced with fixed dental prostheses (FDPs); thus, knowing the patient's oral health-related quality of life (OHRQoL) after placement of FDP and factors affecting their quality of life in addition to their oral hygiene practices is important. This study aimed to measure OHRQoL with FDPs and oral hygiene practices of adults in Riyadh, Saudi Arabia. MATERIALS AND METHODS: A survey was distributed in hard and soft copy forms. Target subjects were adults older than 18 years with FDP and living in Riyadh. The questionnaire contained four domains: demographic data, medical history, characteristics of the prostheses and oral hygiene practices, and Oral Health Impact Profile (OHIP)-14 questionnaire, which measures OHRQoL. RESULTS: The study included 528 subjects. More than half of the participants (56.6%) had poor OHRQoL, which was associated with female gender, full-time employment, and low income. The presence of toothache, periodontal diseases, oral abscess, and broken teeth were all associated with poor OHRQoL. Participants with diabetes were also found to have poor OHRQoL. As for oral hygiene practices, 47% of subjects did not receive oral hygiene instructions after the placement of their FDP. It was also found that 53.4% of the study population brush only once daily. CONCLUSION: Many factors can have an influence on OHRQoL. Both dentist and patient awareness regarding postoperative oral hygiene instructions should be increased to ensure the durability of the prosthodontic appliances and improve patients' OHRQoL.

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BACKGROUND: Early childhood caries (ECC) is a significant worldwide oral health problem. However, parents do not take their children to the dentist for regular screening of oral diseases as early as they do with pediatricians and family physicians. As a result, pediatricians and family physicians are considered as a reliable and perfect source for children's oral health promotion and disease prevention. Studies assessing pediatricians' and family physicians' practice, knowledge and attitude regarding ECC and infant's oral health in Saudi Arabia are few. As a result, this study aimed to assess these aspects. METHODOLOGY: A cross-sectional study based on a structured close-ended questionnaire was conveniently distributed among pediatricians and family physicians in Riyadh city, Saudi Arabia. The questionnaire composed of two main sections; demographic characteristics and questions assessing participants' practice, knowledge and attitude. The data was analyzed using SAS software, frequency and chi-square test were conducted, and P-value of <0.05 and less was considered significant. RESULTS: There was a discrepancy between the participants' knowledge, attitude and practice. The participants' practice was lower (42.6%) compared with their attitude (86.1%) and knowledge (65.3%). Most of the participants (52.5%) indicated lack of clinical time was the main barrier for performing oral health related activities. Majority of the participants (76.7%) indicated that they need more dental training and education. Dental caries preventive methods (44.6%) was the most requested topic, of which workshops and seminars were the main preferred method (39.6%). CONCLUSION: Although most of the participants reported good dental attitude and knowledge, a lack of the associated dental practice was detected. Therefore, more efforts are encouraged to enhance and facilitate dental practice among pediatricians and family physicians.

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Self-medication is a widespread behavior worldwide. It is defined as the practice of self-diagnosis and drug prescription without proper professional consultation. Aim: To determine the prevalence and predictors of self-medication for oral health problems among adults living in Riyadh city. Methods: A cross-sectional study based on a structured close-ended questionnaire was distributed among adults visiting shopping malls in all different five regions of Riyadh. A two-stage sampling technique was used: cluster and simple random sampling. The questionnaire was composed of two main sections: demographic characteristics and questions assessing the behavior of self-medication. Results: The prevalence of self-medication was found to be 63.25%, with a higher prevalence among females than males. Gender and nationality were significantly associated with self-medication. Salt in hot water locally (52.57%) and acetaminophen (47.43%), a type of an analgesic, were, systemically, the most frequently used. Pharmacy shops were the main source of these medicaments (66.01%). Similarly, the advice for using them was mainly given by pharmacists (53.36%). Lack of time was claimed to be the main reason for practicing self-medication (54.55%) with abscess, toothache, and gingival bleeding being the main predictors. Conclusions: Self-medication was found to be a common practice among the population of Riyadh city.