Aim:The present study's aim was to assess the pattern of palatine ridges/rugae to identify gender. Materials and methods:This study consists of a total of 50 participants (25 males and 25 females). Participants of the age range of 20 to 50 years were selected from the outpatient department. According to the shape and size of the patient's arches, maxillary impression trays were selected using alginate, and casts were poured subsequently. With the help of a sharp graphite pencil, the palatine ridges were delineated to make it prominent, and on either side of the midline, the number of rugae was counted and the length measured. Using these parameters, the pattern of rugae was determined. Data were analyzed using independent sample t-test. The level of significance was set at 5%. Results:Males had more number of palatal rugae (mean 5.96 ± 0.88) compared with females (5.24 ± 0.77), and there was a statistically significant association between them. The mean length of palatal rugae was more in males (6.25 ± 1.15 mm) than females (5.16 ± 1.40 mm), and it was found to be a statistically significant association. The straight pattern was more common in both males and females (2.56 ± 1.08, 2.32 ± 0.85 respectively) than other patterns.

A bstract Introduction An accurate impression is one of the prime factors for success of any restoration, more so in field of fixed prosthodontics. The critical aspect is to reproduce fine surface details along with ease of use. Knowledge of impression materials and the techniques to which each is best suited is essential in achieving consistent results. Objective of the study The purpose of this study is to evaluate the accuracy of various putty-wash techniques in a laboratory model that simulated the clinical practice. Materials and methods A metal master model, containing three full crowns fixed partial denture (FPD) abutment preparations, was fabricated. A perforated custom tray was fabricated that can be placed in the same position on the master model for each impression. For each technique, 10 impressions of the master model were made and poured using a die stone. The measurements were made of the models using a measuroscope and the accuracy of the impressions was recorded. Results The statistical comparison between groups I, II, III, and IV casts measurements by using the Mann–Whitney test showed highly significant statistical difference between the various groups from each other ( p < 0.001) Conclusion The accuracy of the working casts obtained from group III impression (two-step using 1 mm coping) was the best, whereas it was least with group II impression (two-step using polyethylene spacer). How to cite this article Gautam N, Ahmed R, Sharma S, et al. A Comparative Study to Evaluate the Accuracy of Various Spacer Thickness for Polyvinyl Siloxane Putty-wash Impression Techniques: An In Vitro Study. Int J Clin Pediatr Dent 2020;13(5):536–542.

Background: The color stability of commercially available denture base acrylic resins (Lucitone-199, DPI and Travelon-HI) was studied in vitro. Material Methods: The specimens were exposed to tea, coffee and turmeric solutions at 37 ± 1 °C. Colour measurement of the specimens from each brand of denture base acrylic resin recorded by spectrophotometer. The specimens were washed under distilled water and dried before measuring the colour on 0, 10, 20 and 30 days of immersion and color differences were calculated. Results: Statistically the colour change was significant between and within the groups of different heat cure denture base acrylic resins. Conclusion: Where as Lucitone-199 heat cure showed the highest colour variation in tea and coffee followed by DPI and Travelon-HI.

A bstract Aims and objectives The aim and objective of the study were to determine the amount of marginal discrepancy produced by cobalt–chromium (Co–Cr) copings fabricated using two different fabrication methods, i.e., traditional casting and direct metal laser-sintering (DMLS), and compare the values obtained between each fabrication technique and to evaluate if the fabrication technique can produce prosthesis that is within the standards of clinical acceptance of marginal discrepancy. Materials and methods Twenty metal copings each were fabricated by laser sintering and traditional casting method. The marginal gap at the buccal, lingual, mesial, and distal areas was measured using the silicone replica technique. The stereomicroscope and optical microscope were used to measure the marginal discrepancy between the working die and the copings. Statistical analysis was done using a t -test using Open-epi calculator software. Results The values indicate that the marginal gap was less for the copings fabricated using Co–Cr alloy crowns that were fabricated with direct metal laser-sintered technique than Co–Cr alloy crowns fabricated with conventional casting technique. How to cite this article Gautam N, Khajuria RR, Ahmed R, et al. A Comparative Evaluation of Marginal Accuracy of Co–Cr Metal Copings Fabricated Using Traditional Casting Techniques and Metal Laser Sintering. Int J Clin Pediatr Dent 2021;14(1):128–132.

Aim: This study was undertaken to study the effect of three most commonly used dentifrices for denture cleaning and to find out any positive association between number of strokes by toothbrush and surface roughness of acrylic resin. Materials and methods:About 40 acrylic rectangular blocks with high finish were polished until surface roughness was calculated as 0 µm. The materials tested were distilled water as a control group, Patanjali Dant Kanti, Colgate Total Cream, and Cleansodent as dentifrices. Stroking was done with dentifrices, and surface roughness readings were recorded at 1,000, 9,000, and 18,000 strokes.Results: Patanjali Dant Kanti was found to have maximum abrasive potential followed by Colgate Total Cream, followed by Cleansodent and least by distilled water. Conclusion:Surface roughness was found to be directly proportional to the type, size, and fineness of the abrasive component used; the professional denture cleanser (Cleansodent) has less abrasive potential than the regular toothpastes. Among those tested, the highest abrasive potential was found in Patanjali Dant Kanti and lowest by Cleansodent (denture cleanser).Clinical significance: The patient as well as dentist should choose the dentifrice with utmost care noting the size and type of abrasives used. Washing the dentures normally with water without toothbrush daily and cleaning of dentures once in 10 to 15 days with a soft toothbrush and professional denture cleanser should be the line of maintenance of dentures.