Bachelor's in Prosthodontics

Jul 1, 2009 - Jul 1, 2014

Master's in Prosthodontics

Jul 1, 2017 - Dec 30, 2019

PhD in Maxillofacial Rehabilitation

Apr 1, 2021 - Aug 29, 2024

lecturer [Lecturer]

Jul 1, 2015 - Present

Teaching
Courses taught: General Anatomy, Physiology, Medical terminology.

Color Changes in Dry Pigmented Tech-Sil25 Maxillofacial Elastomer after Artificial Weathering

Oct 1, 2019

Journal Indian Journal of Forensic Medicine

Background : Maxillofacial prosthesis that processed from silicone elastomer materials have their own physical properties that will lead to degradation on frequent subjection to ultra violet sunlight that will need to replacement of the prosthesis because of its pigments undergo color changes. Aim of the Study : The objective of this study isto evaluate effect of three periods of artificial aging at (75h, 150h, 300h) on color changes of room temperature volcanized (Tech-sil25) silicone maxillofacial material after incorporation 0.2 % by weight of dry pigment (Burnt sienna) by using spectrophotometer test. Materials and MethodTotal of20 circular disk (2mm thick and 20mm diameter) specimens were fabricated by incorporation of 0.2 % by weight of Burnt sienna to room temperature vulcanized (Tech-Sil25) silicon divided into two groups control and study group ,10 samples for each group. The control group samples wastested for color change with spectrophotometer and the study group were subjected to artificial weathering ultraviolet for (75, 150, and 300 h) then after each period they tested for color change with spectrophotometer. All data were analyzed with a descriptive statistical analysis, one -way ANOVA test, LSD test. Result:Subjection of the burnt sienna pigmented (Tech-sil25) maxillofacial silicone elastomers to ultraviolet light resulted in a highly significant increase (P≤ 0.01) in mean values of color absorbance after artificial weathering for (150-300 hours) where there is no significant differences in mean values of color absorbance after artificial weathering for (75 hours). Conclusion: The color change in silicone elastomer pigmented with burnt sienna is increase with increasing the aging period.

1- Enhancement of Tech‐Sil25 Maxillofacial Silicone Mechanical Properties after Artificial Weathering through Addition of Nanoparticles‏

Dec 31, 2022

Journal International Journal of Dentistry

Purpose. To evaluate the e.ect of nanosilica and nanoalumina addition in Tech-sil25 maxillofacial silicone before and after exposure to arti2cial weathering conditions. Materials and Methods. A total of 144 samples were divided into four groups, a control group (n = 12) and three test groups, nanosilica (NS) (n = 36), nanoalumina (NA) (n = 36), and a hybrid nanoparticle (HySA) (n = 60) at di.erent weight percentages (1, 2, and 3 wt. %) was added to Tech-sil25. Samples were exposed to arti2cial weathering for 100 hours, and subjected to characterizations involving tear strength, shore A hardness, roughness, and tensile strength tests. (e data were analyzed using descriptive and inferential statistics using a one-way ANOVA test to determine the level of signi2cance between the groups. Results. After 100 hours of arti2cial weathering, the one-way ANOVA result shows a highly signi2cant increase in tensile and tear strengths with a minimal increase in hardness and roughness observed in samples containing 2% nanosilica (NS) followed by hybrid nanoparticle (HySA) of 1% nanoalumina (NA) + 1% nanosilica (NS) compared with a control group and other groups. Conclusions. (e addition of nanosilica (NS), nanoalumina (NA), and a hybrid nanoparticle (HySA) to the Tech-sil25 maxillofacial silicone improved its mechanical properties. (e combination of several 2ller reinforcements is essential for enhancing

Nanoparticles in Enhancing Mechanical Properties of Silicone for Maxillofacial Rehabilitation - A Review

Oct 1, 2023

Journal Journal of Evolution of Medical and Dental Sciences

BACKGROUND Facial prostheses are made to restore a missing part of the face, so they must be made from a material that mimics the surrounding soft tissues and skin in properties. The studies nowadays show that the maxillofacial silicone elastomer is widely used for this purpose because of its biocompatibility, can be easily colored by intrinsic or extrinsic coloration, and good elasticity. The drop points of the pure silicone elastomers are the mechanical properties such as the tear strength and the tensile strength, which need to be improved to be clinically applicable. This improvement may be done by the addition of some types of Nano-oxide fillers. The objective of the study was to review the results of previous studies that evaluated the effect of adding different types of nanoparticles on improving the silicone maxillofacial rehabilitation material mechanical properties. METHODS Search Methods: An electronic search in PubMed/Medline was used to find applicable papers that were published in English before September 2022. Selection Criteria: By examining the title, abstract, and full text of the articles to ensure that they fit the inclusion criteria, the relevance of the articles was confirmed. The term was chosen based on the following: silicone elastomer as the population, nanoparticles as the intervention, and silicone elastomer with and without nanoparticle reinforcement as the comparison (mechanical properties). Data Collection: Data regarding the published articles on the effect of adding nanoparticles to silicone material to enhance its mechanical properties has been collected. RESULTS Out of 27 articles, 18 articles met the requirements for data extraction for review of the results of studies that evaluated the effect of different nanoparticle addition on improving the mechanical properties of the silicone elastomer. Among the essential properties to be considered was that the silicone’s mechanical characteristics were enhanced by the incorporation of various nanoparticles at concentrations ranging from 1% to 3%. CONCLUSIONS An ideal maxillofacial silicone that exhibits perfect mechanical properties in a variety of human and environmental aging situations hasn't yet been found.

Evaluation of Maxillofacial Silicone Implant Superstructure Material Mechanical Properties after Addition of Titanium Dioxide Nanoparticles

Nov 1, 2024

Journal Journal of Evolution of Medical and Dental Sciences

BACKGROUND This study is to investigate the effects of titanium dioxide addition on maxillofacial silicone implant superstructure material mechanical properties. METHODS A total of 60 samples were prepared and divided into 6 groups; control, 1% Tio2 (nano-titanium oxides), 1.5% Tio2, 2% Tio2, 2.5% Tio2, 3% Tio2 which was added to (VST30) silicone elastomer. Samples were exposed to artificial weathering for 600 hours, then tested for tensile strength and Shore A hardness. The data were analyzed using a one-way ANOVA to determine the differences between groups. RESULTS After artificial weathering, a high increase in the mean value for tensile strength with a significant increase in hardness in samples containing 2.5% Tio2, followed by the samples with 2% Tio2 compared to the control and other groups. CONCLUSIONS The addition of Tio2 nanoparticles to maxillofacial silicone improved its mechanical properties. Tio2 nanoparticle filler reinforcement is encouraging for enhancing tensile strength and Shore A hardness properties values for the longevity of maxillofacial silicone.

The Effect of Hybrid Nano Addition on the Color Stability of Maxillofacial Rehabilitation Silicone Material after Weathering

Nov 21, 2024

Journal Medical Journal of Babylon

Background: Facial prostheses may get discolored and change color from intrinsic and extrinsic coloring due to external factors. This is related to the inherent color stability of elastomers and colorants. Objectives: We aimed to evaluate the effect of hybrid nano additives on the color stability of Tech-Sil25 room-temperature vulcanized silicones used for maxillofacial prosthesis after artificial weathering. Materials and Methods: A total of 70 samples were fabricated for fourteen groups. Seven groups contained 0.2 wt% burnt sienna, and another seven groups contained 0.2 wt% cobalt blue. The seven groups were the control groups. Each group consists of five samples. The samples were exposed to artificial weathering for 300 h. The CIELAB color system was used to record the color values. It aids in the numerical classification of color differences by describing the three color coordinates (or color values) x, y, and z in three unique corresponding values of L, a, and b, respectively. Results: Burnt sienna pigment samples with hybrid nano 1%NS+1%NA show the highest color stability, followed by 2% NS and 2% NA; the least color change was observed (ΔE* about = 1.1) by the visual system as the threshold was seen. The cobalt blue pigment shows the most significant color change. The color shift observed in all groups was within the clinically acceptable level. Conclusion: It can be concluded that a 2% hybrid nano additive can improve the color stability for both pigment groups (burnt sienna and cobalt blue). The variation in color in the burnt sienna group was less than that in the cobalt blue groups. The color change in each group came within an acceptable range for clinical purposes.

Color Stability and Roughness of Ocular Prosthesis Between Heat-Cured Acrylic and 3D Printed Acrylic After Artificial Weathering

Jan 29, 2025

Journal International Journal of Dentistry

Eye loss canmajorly impact a person’s look, functionality, and psychological well-being. This study addresses a critical gap in understanding the durability of ocular prostheses by investigated the surface roughness and color stability of ocular prostheses fabricated using threedimensional (3D) printing and heat-cured polymethyl methacrylate (PMMA) acrylic resin (QC-20 heat polymerize) after they were subjected to artificial weathering. Two techniques were used to create 100 samples (2mm thickness and 20mm diameter) that were fabricated and divided into 50 heat-cured PMMA samples, and 50 samples were made using Next Dent Denture 3D acrylic resin printed with 3D printing technology stereolithography (SLA) 3D printer. All samples were subjected to 300 h of artificial weathering using a weathering chamber. Color changes were tested using a spectrophotometer, while surface roughness micrometers (μm) were measured with a profilometer. Descriptive statistics were used, followed by one-way analysis of variance (ANOVA), independent sample t-tests were used, and the significance level was α=0.05. The results demonstrated a significant difference in color stability between the two materials and fabrication methods; the highest mean ΔE observed in heat-cured PMMA samples was 2.67 (p¼0:003) and the lowest in 3D-printed samples ΔE of 1.42, respectively. Regarding surface roughness, PMMA demonstrated the highest mean of 0.58 μm, while the lowest mean was with the 3D-printed samples at 0.33 μm (p¼0:001), 3D-printed prostheses exhibiting superior resistance to color changes after weathering. 3D-printed prostheses maintained a significantly smoother surface texture compared to heat-cured acrylic ones. These findings concluded that 3D-printed ocular prostheses offer potential advantages in color stability and surface smoothness, potentially enhancing esthetic outcomes, wearability, and patient satisfaction.