Browsing by Author "Salama, Aya A"

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Color stability of two diferent resin matrix ceramics: randomized clinical trial
(BioMed Central Ltd., 2023-08) Mahrous, Aliaa Ibrahim; Salama, Aya A; Shabaan, Alshaimaa Ahmed; Abdou, Ahmed; Radwan, Mohamed Mostafa
Background One of the most common causes of aesthetic failure and restoration replacement is the tooth restorations color mismatch specifcally after aging. Methods One hundred and two participants with endodontically treated frst molar were selected clinically. The patients were randomly splited into two groups and restored either with Cerasmart hybrid ceramic or Vita Enamic polymer infltrated ceramic network (PICN) crowns and cemented using dual cure adhesive cement. The color difer- ence (ΔE) values after cementation at 0 (Baseline), 6, and 12 months of use were obtained by quantifcation of L*, a*, and b* values with a digital spectrophotometer. Mann–Whitney test used to compare between tested groups at each time point and between (α=0.05). Results At 6 months follow-up intervals, Vita Enamic group showed the highest signifcant ∆L* (p=0.035) and ∆a* (p<0.001) compared to Cerasmart group. ∆b* and ∆E showed no signifcant diference between both groups (p>0.05). Furthermore, all color parameters of both groups showed statistically signifcant diference at 12 months follow-up intervals. After 12 months, Vita Enamic restorations presented higher color change compared to Cerasmart restorations with a (p-value of 0.0120). When comparing the total color diference ∆Et through-out the follow-up intervals of Vita Enamic & Cerasmart groups, there were insignifcant diference (p=0.263). Conclusion Both hybrid materials demonstrated comparable color stability after 1 year of clinical service within clini- cal acceptance range. However, Cerasmart demonstrated a better colour stability after 1 year. Trial registration ClinicalTrials.gov (ID: NCT05501808) 15/8/ 2022- ‘retrospectively registered’.
The effect of aging on the translucency of contemporary zirconia generations: in-vitro study
(BioMed Central Ltd, 2024-06) Salama, Aya A; Shehab, Karim A; Bushra, Sherif Samir ; Hamza, Faisal Safwat
BACKGROUND: The translucency of different zirconia generations at each time point after thermocycling aging is still lacking. METHODS: Four zirconia materials were used with a total of 60 samples produced from monolithic third generation (5Y) 5 mol% yttria-stabilized zirconia polycrystalline ceramic and fourth generation zirconia (4Y) 4 mol% yttria-stabilized zirconia polycrystalline ceramic, represented by [group1:[CM-5Y] Ceramill Zolid fx (3rd generation zirconia) (Amann Girrbach, Koblach, Austria), group 2:[CM-4Y] Ceramill Zolid HT + (4th generation zirconia) (Amann Girrbach, Koblach, Austria), group 3:[CC-5Y] Cercon XT/ML (Dentsply Sirona, Germany) (3rd generation), and group 4:[CC-4Y] Cercon HT/ML (Dentsply Sirona, Germany) (4th generation)]. The L*a*b* figures were measured by using a spectrophotometer at baseline and after 10,000, 30,000, and 50,000 cycles of thermocycling. At each interval, the translucency of the samples was estimated by using the translucency formula CIEDE2000. The Scheffe post-hoc compared differences among each of the four materials. The Repeated measures ANOVA tested the differences between the materials at each of the different thermocycling intervals (p < .001). Data analyses were evaluated at a significance level of p < .05 (CI 95%). RESULTS: Two-way ANOVA revealed that at baseline the third and fourth generation's zirconia showed statistically significant differences in translucency (P < .001). Translucency values at baseline and after thermocycling exhibited statistically significant changes (p = .003). At each of the time interval; CM-4Y had the highest translucency values followed by CM-5Y, CC-4Y and CC-5Y had the least translucency values. CONCLUSIONS: The third and fourth generations of zirconia displayed different translucencies. Thermocycling affected the translucency of both third and fourth generations of zirconia. At each of the time intervals group 2:[CM-4Y] had the highest TP followed by group1:[CM-5Y], while, group 3:[CC-5Y] and group 4:[CC-4Y] had the least TP.
Root Canal Medicaments - Literature Review
(ACTA, 2020-03) Salama, Salma A; Salama, Aya A
Objective: Identify, through an integrative literature review, the general update on clinical studies, current research and new developments in the area of root canal pastes, endodontic cements and dressings. Method: The scientific electronic bases were used: MEDLINE, PUBMED, and COCHRANE for assessing ADM’s class III medical devices: Odontopaste, Odontocem and Odontocide, to determine if these products are in line with recent best dental practice.The research took place between March and December 2019, for articles published between the period 2007 to 2019. Exclusion criteria were: editorials, abstracts, theses and dissertations. Results: 21 articles were found that reflected relevant aspects of the medical root canal medicaments. Conclusion: For a wide range of materials currently available on the market, ADM’s class III medical devices: Odontopaste, Odontocem and Odontocide meet the requirements of a formulation which is compatible with recent restorative and endodontic practice and in regards the active ingredients in all three products no safety complains was reported from any in the last 12 months research.