Laypersons' Assessment of Smile Esthetics in Young Individuals in Ha'il, Saudi Arabia.

Introduction: When planning esthetic dental treatments, understanding smile preferences is important for dental professionals. This study aimed to evaluate the impact of selected smile characteristics on the attractiveness of young Saudis as assessed by Saudi laypersons and explore gender-preferred changes in smile attractiveness.

Methodology: This observational study assessed the dynamic smile attractiveness of 168 Saudi individuals (84 males and 84 females), selected through non-probability convenience sampling.

The effect of 1,450 and 5,000 ppm sodium fluoride on polished dentin after citric acid erosion using change in step height.

Purpose: To measure step height change, using profilometry on dentin, after pre-treatment with sodium fluoride at 1,450 and 5,000 ppm and then erosion with citric acid. .

Methods: Dentin specimens (n= 150), sectioned from the coronal aspect of extracted human molars were randomly divided into three groups of 60 samples each and fully immersed in deionized water (control), or solutions of NaF with 1,450 ppm (F1450) or 5,000 ppm (F5000) for 3 minutes and then artificial saliva (not containing proteins) for 30 minutes.

Comparison of metrology created by profilometry and digital microscopy on polished dentine in an erosion/abrasion model.

Objective: Digital microscopy offers the ability to scan surfaces to produce 3D reconstructions, allowing step height measurements with high accuracy. The aims of this study were to compare the step heights from the gold standard, non-contact profilometry, to digital microscopy in an erosion/abrasion model.

Methods: Dentine specimens (n = 60) were immersed in deionised water, 1450 ppm and 5000 ppm fluoride as sodium fluoride for 3 min, eroded for a total of 25 min in a cycled protocol in 0.

Caries lesion remineralization with fluoride toothpastes and chlorhexidine - effects of application timing and toothpaste surfactant.

Introduction: Habitual toothbrushing with fluoridated toothpaste followed by rinsing with antibacterial mouthwashes is a method to maintain good oral hygiene and to diminish the occurrence and severity of dental caries and periodontal disease. However, our understanding of how antimicrobial agents in mouthwashes affect fluoride-mediated caries lesion remineralization is still poor.

Objective: The objectives of this in vitro study were a) to determine the effects of the waiting period of chlorhexidine (CHX) rinsing after fluoride toothpaste use and b) to further determine the effect of the type of toothpaste surfactant [sodium dodecyl sulfate (SDS) or cocamidopropyl betaine (CAPB)] on caries lesion remineralization associated with CHX rinsing.