To Evaluate and Compare the Effect of Various Surface Treatment Modalities on Shear Bond Strength of Composite to Polyetherketoneketone and SEM Analysis: An In vitro Study.

Context: It is a challenge to bond resin materials with polyetherketoneketone (PEKK). To increase the bond strength, surface treatments using chemical adhesion, mechanical adhesion, or a combination of both can be used. Aims: The objective of the present study was to evaluate and compare the shear bond strength of PEKK to the composite resin after various surface treatments and to evaluate the fracture mode analyses. Materials and Methods: One hundred and twenty PEKK specimens were randomly divided into four groups (n = 30) after three different surface treatments (95% sulfuric acid etching, airborne abrasion with 110 µm aluminum-oxide, and 99% acetone). With the help of polytetrafluorethylene tube, resin composite (3M ESPE) was bonded on all the specimens, thermocycled, and subjected to shear bond strength testing. Thereafter, 15 samples from each group were assessed for fracture mode analyses using a scanning electron microscope. Statistical Analysis Used: Mean, Standard deviation, one-way analysis of variance (ANOVA) f-test, post hoc Tukey's test. Results: Statistical analysis using one-way ANOVA f-test revealed that the results were significant with a P < 0.05 with the maximum value obtained in the case of air abraded group and the minimum value obtained in the case of the untreated group. Adhesive failure mode was the most common among the air-abraded group. Conclusions: The mechanical surface treatment group (air abrasion) showed higher shear bond strength than the chemical surface treatment groups (sulfuric acid and acetone). The mixed-type fracture mode was most commonly noted in the air-abraded group.

Prevalence and severity of temporomandibular joint disorder in partially versus completely edentulous patients: A systematic review.

Temporomandibular joint disorders (TMDs) following tooth loss may or may not be prevalent, but the risk of developing these disorders is always there due to changes in occlusion and vertical dimension, leading to changes in the disc-fossa relationship. The purpose of this systematic review was to evaluate the prevalence and severity of temporomandibular joint (TMJ) disorder in partially versus completely edentulous patients. An elaborated literature search was conducted in PubMed/Medline, Scopus, Web of Science, Lilacs, and Google Scholar databases including all articles about varied effects of partial and complete edentulism on the TMJ published from January 1, 2000, to January 1, 2022. After the meticulous screening, only publications which fulfilled the inclusion parameters were ultimately selected for full-text evaluation and tested for bias using the Joana Briggs Institute Appraisal tools for cross-sectional, case-control, and cohort studies. A total of 547 articles from various electronic databases and manual searches were found. After eliminating the duplicates and thorough screening, 13 studies were included for qualitative synthesis. Most of the studies demonstrated at least one or two signs of the presence of TMDs following tooth loss, the intensity/frequency of which increased in proportion to the number of missing teeth.

An in vivo study to assess and compare the angular, linear, and depth deviation as well as the difference in bone density of implants placed using computer-aided design/computer-aided manufacturing fabricated three-dimensional guides versus the implants placed using bone pen kit in maxillary and mandibular ridges.

Aim: The aim is to assess and compare angular, linear, and depth deviation and difference in bone density of dental implants placed using computer aided design/computer aided manufacturing (CAD/CAM) fabricated surgical guides versus implants placed using Bone Pen Kit. Till now, no original research exists in the search engines such as Pubmed, Google Scholar, Science Direct, and Research Gate on this kit. Settings and Design: In vivo- Randomised control trial. Materials and Methods: Twenty clinical cases were selected and split into two distinct groups. Group 1 involved the placement of 10 implants using CAD/CAM fabricated three dimensional guides and Group 2 involved the placement of 10 implants using Bone Pen Kit. Four deviation parameters were evaluated, which included: (a) Angular deviation, (b) Linear deviation at implant platform, (c) Linear deviation at implant apex, and (d) Depth deviation and difference in bone density before and after implant placement was also evaluated. Statistical Analysis Used: SPSS software version 23 was utilized for the analysis of the data. The comparison was made using the Whitney test, and Wilcoxon signed rank test. Results: When comparing angular deviation, the results indicated a statistically significant difference with a P < 0.05. The values observed for angular and linear deviation in Group 2 were significantly greater than those in Group 1. No statistically significant difference in depth and linear deviation was found at the implant platform among the two groups. Bone density before and after implant placement was significantly higher in Group 1. Conclusions: (1) Angular and linear deviation at the apex in Group 2 exhibited higher values in comparison to Group 1, (2) No difference in depth and linear deviation at the implant platform was found among the two groups, and (3) There was no difference in change in bone density among two groups.

Marginal bone loss around implants with platform switching and platform matched connection: A systematic review.

STATEMENT OF PROBLEM: Platform switching using narrower abutments than the implant platform has been used to reduce marginal bone loss (MBL) surrounding dental implants. While platform switching has been reported to prevent initial peri-implant bone loss, available data regarding the use of the platform-switching implant abutment configuration with long-term follow-up has been sparse; thus, the systematic review was planned to evaluate the best available evidence for the use of the platform switching technique. PURPOSE: The purpose of this systematic review was to answer the specific question, "Is there a difference between platform-matching implant abutment configurations and platform-switching implant abutment configurations in terms of MBL changes around endosseous implants"? MATERIAL AND METHODS: The PubMed/Medline, Scopus, Google Scholar, and Lilac databases were searched by 2 independent reviewers for articles published between January 2000 and July 2022. Platform-switched versus platform-matched implants were examined for changes in MBL in human randomized clinical trials (RCTs) and potential clinically controlled cohort studies (PCCS). RESULTS: Overall, 4 eligible studies were included and critically evaluated to summarize their findings. The follow-up period of the included studies was between 5 and 10 years. Two of the included studies showed a mean ±standard deviation of 0.6 ±0.20 mm MBL at 5 years and 1.20 ±0.21 mm at 10 years for the platform switched (PS) technique and 1.1 ±0.3 mm and 1.24 ±0.39 mm MBL for the platform matched (PM) technique. Another study showed marginal bone level changes for the platform-switched technique to be 0.18 ±0.14 mm as compared with the platform matched technique (0.80 ±0.40 mm). In one of the studies published in 2019, the mean estimated difference in the marginal bone levels of PS- and PM-restored implants after 5 years was reported to be 0.29 mm. The descriptive analysis of 4 RCTs indicated that platform-switched implant-to-abutment connections reduced average marginal bone loss surrounding implants compared with platform-matched implant-to-abutment connections, favoring the platform-switched approach. CONCLUSIONS: Platform switching appears to be a beneficial approach for retaining the crestal bone around dental implants.

To compare the stability and crestal bone loss of implants placed using osseodensification and traditional drilling protocol: A clinicoradiographical study.

AIM: The present study was done to evaluate and compare the stability of the implant and the loss of crestal bone in the implants placed using OD drilling and traditional drilling technique. SETTING AND DESIGN: In vivo-comparative study. MATERIALS AND METHODS: A total of 20 implants were placed in the anterior maxilla, and the patients were divided into two groups. In Group I, the implants were placed using traditional drilling technique, and in Group II, implant placement was done using OD drilling technique. Primary stability was measured in both the groups at baseline (immediate postoperative), and at an interval of 6 months, while crestal bone levels were measured at baseline, 6, and 8 months. STATISTICAL ANALYSIS USED: The data obtained were subjected to unpaired t-test to make intergroup comparisons, while one-way ANOVA F-test was used to make intragroup comparisons. RESULTS: The primary stability of implant placed using OD drills was found to be slightly higher than implant placed with traditional drilling; however, there was no statistical significance (P > 0.05). When the data obtained for crestal bone levels were statistically analyzed, no significant difference between the two groups was obtained (P > 0.05). CONCLUSION: Within the limitations of this study following conclusions were drawn: there was no statistically significant difference in implant stability between the traditional drilling and OD drilling (P < 0.05). On comparison of crestal bone levels between OD and traditional drilling, no statistically significant difference was found between the two groups (P < 0.05).

Pyrexia: An update on importance in clinical practice.

Pyrexic patients are usually attended with some scepticism by anaesthesiologists. Main reasons are the absence of comprehensible guidelines pertaining to anaesthesia in such patients and the presence of innumerable aetiologies of pyrexia. This article has tried to fill the existing void in the medical literature regarding anaesthesia in a patient with pyrexia. The article aims to discuss common and relevant causes of pyrexia, their pathophysiology in anaesthetic perspective, and the subsequent anaesthetic management, though a detailed discourse on all the entities causing pyrexia is beyond the scope of this article. This article will also touch upon the thermoregulatory alterations during anaesthesia. The literature search was performed manually using text and reference books, peer-reviewed journals, online and offline and through internet search engines Google, PubMed and Medline databases, using search terms 'perioperative pyrexia or fever, anaesthesia and thermoregulation'. Articles from 1980 to 2013 in English language were selected.

Rehabilitation of digital defect with silicone finger prosthesis: a case report.

Patients with acquired defects often had severe trauma which leads to psychological instability, functional loss and poor aesthetics. Digital defects threaten the integrity of one's self esteem and also leads to a reduced and compromised function. A well fitted and colour matched finger prosthesis can make a patient feel a capable person and not a handicap. This article describes a technique for fabrication of custom made finger prosthesis with a silicone elastomer. The customization of the prosthesis leads to a better fit and retention. An excellent shade matching is achieved by the use of intrinsic colours. The other advantages of using silicone as a material of choice for prosthesis fabrication are also discussed.