Objective: To compare oral stereognostic proficiency scores between new and previous complete denture wearers. Study design and study settings: This cross-sectional study design was conducted at Armed Forces Institute of Dentistry, Rawalpindi. Methodology: Total 60 patients belonging to age group of 45–75 years were selected from the study setting. Oral stereognostic proficiency was recorded by using different oral stereognostic intra oral testing tools and scores were noted. Data analysis was done using SPSS (version 20) software. Independent sample t-test was used to compare the scores of new and old previous complete denture wearers. Effect modifier like gender was rectified by method of stratification. Post stratification independent sample t-test was applied and p value of 0.05 or less was considered to be significant. Results: The mean age of patients was 59.8+7.85 years. Previous complete denture wearers were found to have a higher value as compared to the new complete denture wearers. Significant difference between both groups according to age was found with older individuals having a lower stereognostic value than younger individuals. Conclusions: Oral stereognostic test is a dependable test to measure patients’ oral stereognostic perception which can help the dentist in better educating the patient in terms of his/her expectations regarding the prosthesis and in better understanding the limitations of the prosthesis

Objective: To evaluate the type and depth of lingual concavity in posterior mandible using pre-treatment CBCT (Cone Beam Computed Tomography) images for dental implants. Study Design and Setting: A cross-sectional study was designed and conducted on pre-treatment CBCT scans of 75 patients at Armed Forces Institute of Dentistry, Rawalpindi, Pakistan from February 2018 to November 2018. Methodology: Pre-treatment CBCT scans of 75 patients were selected and following parameters were measured: type of ridge (undercut, parallel, convex), ridge width, ridge height, depth of lingual concavity, concavity angle, and location of the undercut. Data was analyzed using SPSS version .24. Post-stratification Mann-Whitney U test was used for effect modifiers, while Kruskal-Wallis test was used to compare study parameters between groups. P value <0.05 was taken as significant. Results: A mean concavity depth of 1.17±1.40 mm was observed while majority (46.7%) of the CBCT images presented with undercut type ridge. No significant difference was observed between males and females for any study parameter. Conclusion: Undercut ridges were frequently observed, posing a threat of lingual perforation during implant placement. Pre-operative assessment of implant site using CBCT can serve as a reliable method to avoid such complications