Evaluating the efficacy of denture cleansing materials in removal of tea and turmeric stains: An in vitro study.

Context: Extrinsic staining of acrylic resin dentures could be a major esthetic problem for denture wearers. Tea, coffee, cola, turmeric, and tobacco often cause extrinsic staining of dentures. Aim: To evaluate the efficacy of various denture cleansing materials in the removal of tea and turmeric stains and to compare the efficacy of those denture cleansers with each other in the removal of tea and turmeric stains. Materials and Methods: Heat-cured acrylic resin specimens were stained using tea and turmeric solutions. The spectrophotometer was used to determine the reflectance values of the samples and to evaluate the efficacy of various denture cleansing materials in removal of tea and turmeric stains. Three denture cleansers, namely, sodium hypochlorite, Safe plus, and Clinsodent were used in the study. Water was used as a control. Statistical Analysis Used: ANOVA test and post hoc Tukey's test were used to determine the statistical difference between the groups. Result: A statistically significant difference was found (p ≤ 0.05) between the different denture cleansing materials used. Products containing sodium perborate along with trisodium phosphate had the highest stain removing capability. Conclusion: It was found that all the denture cleansing materials used in the study were effective in removing tea and turmeric stains. Products containing sodium perborate along with trisodium phosphate had a comparatively greater stain removal capability than products containing sodium perborate along with sodium bicarbonate followed by products containing sodium hypochlorite followed by water (control).

An in vivo study to correlate the relationship of the extraoral and intraoral anatomical landmarks with the occlusal plane in dentulous subjects.

Background: The occlusal plane position is considered to be the primary link between esthetic and function. Aim: To evaluate the relationship between extraoral and intraoral soft tissue landmarks with the occlusal plane in dentulous subjects on both sides and to check for any variations. Study and Design: An in vivo study and 100 subjects with all healthy permanent teeth in normal arch and alignment were selected from Modern Dental College and Research Centre, Indore. Materials and Methods: Three custom made instruments (occlusal plane analyzer, buccinator groove relator, and level analyzer) were indigenously designed to check parallelism of the interpupillary line, ala‑tragus line, buccinator groove with the occlusal plane. Relation of retromolar pad with the occlusal plane was checked with the metallic scale. Statistical Analysis: Chi‑square test. Results: In 20.0% subjects, the occlusal plane was parallel to the interpupillary line. The posterior reference point for ala‑tragus line was middle point on right side in 56% and left side in 58% subjects. Intraorally, right side 59% and left side 62% subjects had the occlusal plane at the same level as that of buccinator groove. Right side 48% and left side 45% subjects showed occlusal plane at the middle one‑third of retromolar pad. Conclusion: The occlusal plane is not generally parallel to interpupillary line. The occlusal plane is parallel to the ala‑tragus line with middle point of tragus as posterior reference point on right and left sides. Both sides, the buccinator groove and the middle one‑third retromolar pad are coinciding with occlusal plane level.

Assessment of the learning environment in prosthodontic department based on Dental College Learning Environment Survey by the graduates of a dental institute in India / 보건의료교육평가

The purpose of this study was to determine dental graduates' perceptions of learning environment in a prosthodontic department in a dental institute in India. The 60-item closed-ended, cross-sectional questionnaire with five options was completed by the dental graduates and the dentists. The data obtained was analyzed using statistical software. The mean, SD, frequency and percentages were calculated wherever appropriate. The questionnaire was answered by 242 dentists and dental graduates. Of the seven Dental College Learning Environment Survey scales, the highest mean scores were for student to student interaction (2.76+/-0.53) followed by meaningful learning experience (2.67+/-0.39). The lowest scores were for flexibility (2.26+/-0.51) followed by supportiveness (2.40+/-0.59). The lowest mean scores obtained for the 'flexibility scale' conveys that the opportunity for the faculty and students to modify the learning environment are less than for the other categories, and there is thus a need to modify the learning environment. Faculty should also increase their support to the students by contributing to an effective and meaningful interaction by creating a congenial environment.