Purpose: Evaluation of the accuracy of implants position using two different types of computer-aided design/computer-aided manufacturing (CAD/CAM) surgical guides, including bone supported and mucosa supported guided templates. Materials and methods: Twelve completely edentulous patients were selected for this study and divided into two groups six each. all patients received a radiopaque radiographic template. A cone beam computed tomography was taken to simulate the position of the two implants, virtual implants were drawn in its place, fabrication of surgical guide template using rapid prototyping technique to match the position of virtual implant according to patient' group. Group I bone supported surgical guide(BSG) and group II mucosa supported surgical guide (MSG). The implants were installed for each patient using surgical guide templates according to the group. The positions and angulations of the placed implants in comparison to those of the planned ones were determined using special software that matched pre-and postoperative computed tomography (CT) images, and deviations were calculated and compared between the two guide templates using a software program to detect any difference in linear and angular deviation. Data were collected; tabulated and analyzed using student T test. Results : There was no significant difference of both linear and angular measurements between virtual and the surgically placed implants for both groups. Also there was insignificant difference in accuracy between group I (bone supported) and group II (mucosa supported). Conclusions: Using template-guided surgery enables the clinician to optimize implant position, angle, diameter and length by dictating the drilling position and angulation. Cone beam CT has accurate measurements in distances between two implants as clinical measurements. The bone supported surgical guide as well as the mucosa supported surgical guide has the same accuracy in implant positioning.

Immunological and inflammatory mechanisms perform a key role in the development and progression of type 2 diabetes mellitus. The objective of this study was to evaluate immunologically the effect of different implant abutment interface, the platform switched (PS) and platform matched (PM) implants for implant assisted complete mandibular overdenture in controlled type II diabetic patients. Methodology: Ten edentulous controlled type II diabetic male patients were selected in a split-mouth study design, where group I represented the right side of the patient and restored with platform-switched implant while group II represented the left side of the patient and restored with platform matched implants. The patients received complete mandibular implant assisted overdenture with O-ring attachment. Saliva samples were collected to measure the level of salivary cytokines (TNF-α & IL-6) using ELISA technique. The recall visits for every patient was at the time of insertion, 3 and 6 months. The data of this study were collected, tabulated and statistically analyzed by IBM-SPSS statistics software. Results: Comparing from denture insertion for group 1, both cytokines (TNF-α & IL-6) were significantly increased after 3 months and significantly decreased after six months, but there were insignificant differences in both cytokines from denture insertion up to 6 months. While for group 2, there a was significant increase from 0 to 3 months and from 0 to 6 months and significant decrease from 3 to 6 months. When comparing the two studied groups regarding the mean level of both pro inflammatory salivary cytokines (TNF-α& IL-6) after 3 and six months of the new denture delivery, group II levels were significantly higher than group I levels. There were significant differences between both groups. Group I implants represented less mean of TNF-α & IL-6 levels. Conclusion: TNF-α and IL-6 can be used as a site specific marker in monitoring early inflammatory changes in peri-implant sulcular fluid. Platform-Switched dental implant is the implant of choice particularly in controlled type II diabetic patients to control inflammatory changes around implant and avoid progression of type 2 diabetes mellitus.

Background and aim:Polymethyl methacrylate (PMMA) is broadly used as a removable prosthesis denture base. Silver Nano-particles (AgNPs) had been included to PMMA because of their antibacterial homes and higher thermal conductivity, at the same time as it had a destructive effect on the flexural strength and coloration stability that is probably resulted from the inhomogeneous combination. The motive of this research changed into to discover whether the addition of (AgNPs) to PMMA either in liquid form or in powder nation can enhance the flexural strength and the shade balance of PMMA. Also evaluating an edentulous menopausal lady as a multidisciplinary control after wearing a denture made from silver nanoparticles added to (PMMA) denture base. Materials and methods:Fifty specimens of heat cure acrylic resin had been organized for flexural strength and color stability. Twenty-five for each test that become divided into 3 groups. Group 1 was the control group (unmodified acrylic resin specimens) and group 2 turned into Nano silver introduced within the form of powder to the polymer of (PMMA), while group 3 was Nano silver brought in the form of liquid to the monomer of (PMMA). Group 2 and 3 specimens had been break up into subgroups A and B 5 each, with 0.2%, and 0.4 % wt. of Nano silver addition to (PMMA) respectively. A flexural strength was measured via the usage of an Instron regular testing machine. A double beam ultra-violet visible spectrophotometer was checked to the degree of coloration stability. One edentulous menopausal woman that present process treatment below a gynecologist for menopausal signs and symptoms was selected as a case report and received denture made out of silver nanoparticles added to acrylic resin and patient satisfaction became evaluated after 4 months. The results have been gathered tabulated and statically analyzed.Results: There has been a massive distinction in the flexural power values among all corporations (p< 0.05) relative to the non-changed heat treatment (control group). Acrylic resin samples with 0.2% in liquid additive form (3A) ended in more flexural power then 0.4% addition (3B) in comparison to different changed groups .The samples with 0.4 % in powder form(2B) had a lowest (1514) Hoda A Rashad and Faten A S Abutaleb E.D.J. Vol. 64,No. 2 flexural strength in comparison to the all groups (p< 0.05). In comparing the color variations (ΔE) comparable to control group, group 3A and group 3B, showed lowest color variations respectively. At the same time group 2Aand 2B ended in highest shade distinction .Conclusion: Set up on the effects of this results, modifying PMMA with Nano silver debris led to lower in flexural strength and shade stability, addition of Nano silver particles in liquid shape was higher than powder form as concerning flexural strength and better color difference and the addition percentage of 0.2 became better than 0.4. Menopausal pride turned into higher and her complain became managed with the new denture.