The findings of the study showed that for materials used in the study, PMMA was more color stable than bis-acrylic composite based resin. Also, material based on PMMA was more resistant to damage from dietary beverages as compared to bis-acrylic composite based provisional crown and bridge resin.

Background: The purpose of this in vivo study was to compare the marginal and internal gap widths of monolithic zirconia crowns fabricated by CAD/CAM technique and metal-ceramic crowns fabricated by conventional technique. Materials and methods: 10 participants needing a single restoration were selected. Zirconia crowns using CAD/ CAM technology (Group A) (n=10) and metal-ceramic crowns (Group B) (n=10) using lost wax casting technique were fabricated for each selected tooth. The marginal and internal gaps of crowns were recorded using a replica technique with light body silicone material stabilized with a regular set putty. Each replica was sectioned buccolingually and mesiodistally and then evaluated at five predetermined sites. The points measured were PM for marginal gap, PA for axial gap, PAO for axio-occlusal transition gap and PO and PCO for occlusal gaps using a stereomicroscope at 30× magnification. The Paired Sample (t) test was used to detect significant differences between the two groups in terms of marginal and internal fit (α= 0.05). Results: The mean for the marginal gap was 77.42μm (±39.5μm) for Group A compared with 95.86μm (±55.12μm) for Group B. Mean values for internal gap was 87.24 (±21.7 µm) for Group A and 132.91 µm (± 50.63 µm) for Group B. Significant differences were observed between both the groups for marginal (p=.010) and internal (p=.000) fit. Conclusions: The CAD/CAM fabricated zirconia crowns demonstrated a better accuracy of fit when compared to metal-ceramic crowns fabricated by conventional technology.

Mucormycosis, a rare fungal infection seen in diabetes, is now very frequent owing to the deadly triad of COVID-19 infection, diabetes, and rampant use of corticosteroids. Immediate management revolves around therapeutic drugs like antifungals, antibiotics, and aggressive surgical debridement. The cases described in the article explain prosthetic rehabilitation of maxillectomy defects. The findings focus on prosthetic rehabilitation of patients with acquired maxillectomy defects after mucormycotic necrosis post-COVID-19 infection and the techniques to overcome the complications like lack of supporting tissues and post-surgical microstomia. The maxillectomies were performed on patients who suffered a superinfection of mucormycosis after COVID-19 contraction and uncontrolled blood sugar levels. Case 1 elaborates a technique to overcome the complications like lack of supporting structures and microstomia by fabrication of sectional and hollow obturator prostheses using sectional impression technique and lost salt technique. Case 2 explains the management of an extensive defect with a mobile soft tissue flap and lone standing tooth by using a functional impression technique to gain retention and support from the remaining soft and hard tissues. Both the techniques overcome the clinical complications and give predictable outcomes. Prosthetic rehabilitation of such challenging cases needs modifications depending upon the clinical challenges encountered.

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Background: Dental caries is the most prevalent dental disease affecting human race. The etiology and pathogenesis of dental caries are known to be multifactorial. Studies have shown that removable partial dentures in the oral cavity increases the biofilm formation and consequently an increase in the occurrence of caries and periodontal diseases. There is a complex relationship between diabetes mellitus and dental caries. Patients with diabetes are more susceptible to oral sensory, periodontal, and salivary disorders which could increase the risk of developing new and recurrent dental caries. Therefore, the aim of the study was to assess the prevalence of dental caries among diabetic and non-diabetic acrylic removable partial denture wearers. Materials and Methods: Individuals participating in the study were partially edentulous and aged between 18 and 64 years. Patients were screened at Out patient department (OPD) in the Department of Prosthodontics JSSDCH, among which 60 patients were diabetic based on the random blood sugar level more than 160 mg/dl—30 patients were wearing RPD and 30 were without RPD. And 60 non-diabetic patients were selected among which 30 were wearing RPD and 30 without RPD. A total 120 patients were screened. Dental caries prevalence was assessed using Decayed, Missing, Filled (DMFT) index. Results: Diabetic group unrehabilitated with removable partial prosthesis showed significant difference in the number of missing teeth when compared to non-diabetic patients without removable prosthesis ( P < 0.05). Conclusion: Removable partial denture prosthesis had less impact on prevalence of dental caries with good oral hygiene, following post insertion RPD instructions and regular dental visits irrespective of diabetes.