ABSTRACT
Aim: This study aimed to evaluate the clinical efficacy of posterior resin implant-supported fixed partial dentures (FPDs) made from two different computer-aided design and computer-aided manufacturing (CAD-CAM) materials: polymethylmethacrylate (PMMA) and polyoxymethylene (POM). Materials and Methods: Twenty-one patients received a total of 49 interim implant-supported FPDs. The same participant received PMMA and POM as part of the control and experimental groups, respectively. The restorations were evaluated 1 week, 3 months, and 6 months after placement. In addition, their functional wear and color stability were assessed. Nonparametric statistics (α = 0.05) were used to analyze the data. Results: The study found that PMMA outperformed POM in surface and color parameters, with more fractures occurring with internal conical connection implants. The color stability analysis showed ΔE*ab values of 7.18 for PMMA and 8.8 for POM, with no significant differences. After 6 months of operation, both materials showed a significant increase in wear, but no significant differences were found within the materials. Conclusion: The study found that PMMA interim implant-supported FPDs outperformed POM in surface and color parameters, while polymer posterior implant-supported FPDs with internal conical connection implants were more fracture-prone.
ABSTRACT
Aim: The study's objective was to assess the dimensional accuracy of hybrid polyether and polyvinyl siloxane materials for implant impressions. Materials and Methods: Nine groups were created from 45 samples of various building materials and construction techniques from the study. Five samples were tested, and 45 impressions were recorded. Results: The hybrid non-splinted technique has improved implant site replication, accuracy, and low interimplant distance alterations. Conclusion: The finest possible reproduction of implant sites on the master cast was made feasible by the use of an open, non-splinted method and a hybrid polyvinyl siloxane-polyether impression material.
ABSTRACT
Objectives: This study aimed to assess the relationship between diabetes mellitus (DM) and the disintegration of the residual alveolar ridge. Methods and Materials: The study sample comprises 144 participants (64 diabetics and 80 controls). Each participant had their orthopantomagram (OPG) taken. Considering the mandibular foreman (MF) and the lower border of mandible in OPGs as landmarks, resorption of residual ridge (RRR) in mandible was evaluated. Results: The resorption in diabetic study participants was 36.9%, while it was 19.1% in the healthy control study participants. The RRR in the diabetic group was greater than the control group (P = 0.0039). Conclusion: The resorption of RRR was greater in diabetic patients.
ABSTRACT
OBJECTIVE: To improve knowledge of oral health among the hearing impaired in Saudi Arabia using videos with detailed oral hygiene instructions in Arabic sign language. METHODS: Videos of oral hygiene instructions in Arabic sign language were produced under the supervision of a periodontist. Fifty male subjects above 18 years of age were chosen randomly from different deaf schools in Jazan, Saudi Arabia and divided into two groups as follows: Group 1 received printed booklets with oral hygiene instructions, and Group 2 received videos of the same instructions in Arabic sign language. Knowledge regarding oral health and hygiene practice was evaluated with the aid of a questionnaire before and after 4 weeks. RESULTS: The estimated marginal mean of the knowledge regarding oral hygiene in Group 1 was 3.37, which was slightly increased to 4.40 after 4 weeks of general instructions. The estimated marginal mean in Group 2 was 3.70 before the distribution of the videos, which was significantly increased to 11 after 4 weeks (P < .001). CONCLUSION: Videos of oral hygiene instructions in Arabic sign language had immensely improved knowledge regarding oral health and hygiene practices in the deaf/hearing impaired patients in this study.
