Aim: The aim and objectives of this study were to assess and compare the efficacy of a new copyrighted technique (wax ball technique, L-77997/2018) and design (denture base design for the wax ball technique, L-78006/2018) for recording centric relation (CR). Settings and Designs: In vivo – comparative study. Materials and Methods: This study was conducted on sixty consented edentulous patients. The study participants were divided into Group I and Group II. CR in Group I patients was recorded using Dawson's bimanual technique (technique 1). For participants in Group II, CR was recorded using the authors’ copyrighted technique (technique 2). Time taken and accuracy of CR records by both the techniques were evaluated. Statistical Analysis Used: Descriptive statistics such as frequency and percentage were calculated for categorical variables, mean and standard deviation were calculated for quantitative variables. Independent t -test was used to compare the time taken to record the CR between the two groups. The accuracy of both the techniques was assessed by Mann–Whitney U-test. Results: The mean time taken for technique 1 was 56.47 s, whereas for technique 2, it was 5.97 s, with an overall mean difference of 50.5 s between the two techniques. Both techniques were found to be accurate, as the CR recorded during jaw relation matched with CR during trial in all the cases in both the groups (frequency 30 (N) and cumulative percentage 100%). Conclusion: From the study, it was found that, time taken for technique 2 was statistically less compared to that of technique 1, and both the techniques were found to be equally accurate.

BACKGROUND Although the metal-ceramic system is still widely used to fabricate crowns and fixed partial dentures, and is considered as the standard treatment in dentistry, aesthetic concerns have stimulated the development of new dental tooth-coloured systems such as PEEK. So, the present study was planned to check the marginal fit accuracies of conventional Porcelain Fused to Metal (PFM) crowns and Polyether Ether Ketone (PEEK) crowns. METHODS Based on the inclusion and exclusion criteria, sample size of 80 patients was considered. Out of 80 patients, 40 patients (Group I) received PFM crowns and 40 patients received PEEK (Group II) crowns. The marginal fit accuracy of crowns was checked using stereomicroscope. CBCT of the same patient with the crown was made to validate the readings obtained using stereomicroscope. RESULTS Data was analysed with the SPSS (Statistical Package for Social Sciences) version 17. Comparison of the two groups for marginal gap was done with unpaired 't' Test. For all the above tests, p value is considered statistically significant when it was ≤0.05. Four points were considered to measure the marginal gaps i.e., MB (Mesiobuccal), ML (Mesiolingual), DB (Distobuccal), DL (Distolingual). The highest marginal gap in the group I was at Mesiobuccal (MB) point i.e. 120.280000 microns and lowest marginal gap was at Distolingual (DL) point i.e. 110.127050 microns. It can be noted from CBCT that the marginal gap present in PFM crown is much greater than the PEEK crown. CONCLUSIONS Comparing the marginal fit accuracy between PFM and PEEK crowns based on the stereomicroscope readings, the marginal fit accuracy in PEEK crowns were much higher than the PFM crowns.