Evaluation of influence of bone quality on onset of action and the volume of anesthetic solution required: An original research

Aim: To evaluate the drug volume and onset of action of local anesthetic agent in different bone densities. Methodology: Present study was conducted on 40 subjects (20 male and 20 female) between 25 to 50 years attending to Sibar Institute of Dental Sciences, A 1.8ml 2% lignocaine with adrenalin was injected in the buccal mucosa(1ml) and palatal mucosa (0.8ml) in desired site of evaluation in maxilla. The duration of onset of action in minutes and drug volume used in milliliters was evaluated, where mainly comparison was done between two different densities of bone (D2,D3) according to Misch classification. Results: Areas of maxillary which had a denser cortical bone (D2) needed more volume (1.8-3.6 ml) of local anaesthetic solution (mean ± sd= 2.98 ± 1.02) for achieving its mode of action and subsequently lead to numbness when compared to D3 bone which was more of a porous variety which needed less volume of anaesthetic solution (mean ± sd= 1.63± 0.78) to achieve results. The comparative result was statistically significant (P=0.037). Conclusion: The denser the bone, more time it would take to achieve adequate level of anesthesia

Comparative evaluation of flexural strength of conventional and reinforced heat cure acrylic resins: An In vitro study

Aim: The aim is to comparatively evaluate flexural strengths (FSs) of conventional and various types of reinforced heat cure acrylic resins. Objectives: To determine the FS of conventional (polymethylmethacrylate [PMMA]) denture base material and reinforced resins by the addition of 2% by weight glass fibers and metal mesh reinforcement, respectively. Materials and Methods: A total of 30 specimens of similar dimensions were prepared for each of the three experimental groups: conventional acrylic resin and the same resin reinforced with glass fibers and with metal mesh. FS was evaluated with a three-point bending test. The results were analyzed with a one-way analysis of variance. Results: All reinforced specimens showed better FS than the conventional acrylic resin. Specimens reinforced with metal mesh showed the highest FS, followed by glass fibers. Conclusion: Within the limitations of this study, the FS of heat-polymerized PMMA denture resin was improved after reinforcement with glass fibers and metal mesh

Collation of chewing efficiency and dentures with diverse occlusal schemes

Background: Rehabilitation of an edentulous patient nurtures satisfaction and this lies in the chewing ability provided by the prosthesis. Aim: To evaluate and compare the masticatory efficiencies of complete dentures with different occlusal schemes. Materials and Methods: Fourteen completely edentulous patients from the age group of 50-70 years were selected according to the inclusion criteria followed in this study. The dentures were made with three different occlusal schemes, i.e., anatomic occlusion without balancing, anatomic occlusion with balancing, and lingualized occlusion and stored in water till the date of denture insertion. Post-insertion instructions were given to the patients at the time of delivery of the dentures. Patients were recalled after seven days and then masticatory efficiency was performed. The test was performed using boiled peanuts and Sieve system. Statistical Analysis: One-way analysis of variance (ANOVA) test and unpaired t-test were carried out. Results: The obtained masticatory efficiency values with anatomic occlusion without balancing, anatomic occlusion with balancing, and lingualized occlusion LO were analyzed using one-way ANOVA test and unpaired “t” test. The tests showed that lingualized scheme had highest masticatory efficiency. Conclusion: Within the scope of this study, it can be concluded that the masticatory efficiency will be generally higher in patients provided with complete dentures fabricated using the lingualized occlusal scheme