scholarly journals Coronal Seal Microleakage Effect of the Four Different Types of Restorative Materials on Endodontically Treated Lower Premolar

2020 ◽  
Vol 11 (4) ◽  
pp. 255-260
Author(s):  
Norhayati Luddin ◽  
Tioh Yen Ji ◽  
Nik Rozainah Nik Abdul Ghani ◽  
Fadzlinda Baharin ◽  
Tahir Yusuf Noorani ◽  
...  
Keyword(s):  
Different Types ◽  
Restorative Materials ◽  
Lower Premolar

Effect of Erosive pH Cycling on Different Restorative Materials and on Enamel Restored with These Materials

10.2341/07-77 ◽  
2008 ◽  
Vol 33 (2) ◽  
pp. 203-208 ◽  
Author(s):  
L. F. Francisconi ◽  
H. M. Honório ◽  
D. Rios ◽  
A. C. Magalhães ◽  
M. A. A. M. Machado ◽  
...  
Keyword(s):  
Clinical Relevance ◽  
Restorative Material ◽  
Tooth Erosion ◽  
Different Types ◽  
Restorative Materials ◽  
Ph Cycling

Clinical Relevance The different types of restorative materials tested were not able to protect adjacent enamel from erosion. Thus, the ability of a restorative material to prevent tooth erosion should not be considered when choosing a material.

scholarly journals Effect of Bleaching with 15% Carbamide Peroxide on Flexural Strength of Three Resin-Based Restorative Materials

2020 ◽  
Author(s):  
Soodabeh Kimyai ◽  
Yasaman Ghavami Lahij ◽  
Mehdi Daneshpooy ◽  
Elmira Jafari Navimipour ◽  
Parnian Alizadeh Oskoee
Keyword(s):  
Flexural Strength ◽  
Hybrid Composite ◽  
Composite Resin ◽  
Restorative Material ◽  
Carbamide Peroxide ◽  
Bleaching Procedure ◽  
Different Types ◽  
Restorative Materials ◽  
The Mean

Objectives: Considering the increasing use of vital bleaching procedures and the increased application of newly introduced resin-based materials for tooth restoration, this study was designed to evaluate the effect of 15% carbamide peroxide gel on the flexural strength of three resin-based restorative materials. Materials and Methods: Three different types of restorative materials namely Beautifil II giomer, Cention N, and Z250 micro-hybrid composite resin were evaluated in this in vitro, experimental study. Twenty-four bar-shaped specimens were prepared from each restorative material, totaling 72 specimens, and were randomly assigned to two subgroups with and without bleaching procedure (n=12). In the bleaching subgroups, 15% carbamide peroxide gel was applied on the specimen surface 8 h a day for 14 days. The flexural strength of the specimens was then measured. Two-way ANOVA was used to compare the flexural strength of the specimens. Results: There was a significant reduction in the flexural strength of materials following exposure to the bleaching agent (P<0.05). The flexural strength was significantly higher in the groups that did not undergo bleaching. However, the mean flexural strength of the restorative materials was not significantly different (P=0.12). Conclusion: The flexural strength of Beautifil II giomer, Cention N, and Z250 micro-hybrid composite resin could be compromised subsequent to bleaching with 15% carbamide peroxide gel. The three resin-based restorative materials exhibited similar flexural strength values irrespective of the use or no use of 15% carbamide peroxide gel.

Cytotoxicity and inflammatory response of different types of provisional restorative materials

2020 ◽  
Vol 111 ◽  
pp. 104643 ◽  
Author(s):  
Marcio Campaner ◽  
Aline Satie Takamiya ◽  
Sandro Basso Bitencourt ◽  
Leticia Cerri Mazza ◽  
Sandra Helena Penha de Oliveira ◽  
...  
Keyword(s):  
Inflammatory Response ◽  
Different Types ◽  
Restorative Materials

scholarly journals The translucency of human teeth and its relation to esthetic restorative materials

2021 ◽  
Vol 8 (11) ◽  
pp. 5603
Author(s):  
Thuraya Abdulrahim Basudan ◽  
Saif Juraythi Alqahtani ◽  
Omar Abdulaziz Alsalmh ◽  
Ekhlas Ishaq Kensara ◽  
Mohammed Fareed Al Mughafi ◽  
...  
Keyword(s):  
Mean Value ◽  
Dental Restoration ◽  
Resin Composites ◽  
Human Teeth ◽  
Lighting Conditions ◽  
Naturally Occurring ◽  
Human Enamel ◽  
Different Types ◽  
Restorative Materials ◽  
Main Factor

The main factor that can determine the harmonization and depth of color restorations for the adjacent other restorations or other teeth is the translucency of these restorations. Many factors can affect the translucency and color of the restoration material, including translucency parameter, lighting conditions, opacity, gloss, light scattering, and overall perception by the naked eye. Previous investigations have indicated that translucency is the main factor that can significantly contribute to the esthetic characteristics of the different dental restoration materials. In the present literature review, we have discussed the translucency of human teeth and its relation to esthetic restorative materials. Comparing the translucency of the different restoration materials with the naturally occurring human enamel is essential for adequate validation of their clinical application. It has been demonstrated that for 1 mm thick human enamel, a mean value for the translucency parameter of 15-19 should be considered. We have also highlighted the differences between the different types of resin composites and different shade groups, and findings indicate the superiority of some types and shade groups over others, as previously discussed. However, it should be noted that further research is still needed to unify the variously estimated values for the translucency parameter among the different restoration materials. This can help clinicians adequately interpret these data and obtain satisfactory clinical and patient-related outcomes.

The Effect of Different Finishing and Polishing Systems on the Surface Roughness of Different Composite Restorative Materials

2007 ◽  
Vol 8 (2) ◽  
pp. 89-96 ◽  
Author(s):  
Hacer Deniz Arisu ◽  
Mine Betül Üçtaşli ◽  
Hüma Ömürlü ◽  
Evrim Eligüzeloğlu ◽  
Suat Özcan ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Composite Resin ◽  
Restorative Material ◽  
Average Surface Roughness ◽  
Significance Level ◽  
Average Surface ◽  
Different Types ◽  
Restorative Materials ◽  
Before And After

Abstract Aim The purpose of this in vitro study was to examine the effect of two different finishing systems on the surface roughness of different types of composite restorative materials. Methods and Materials Thirty specimens, 8 mm in diameter and 3 mm in depth, were prepared using a microfill composite (Clearfil ST, Kuraray Co. Ltd., Osaka, Japan), a hybrid composite (Clearfil AP-X, Kuraray Co. Ltd., Osaka, Japan), and a packable composite (Clearfil Photo Posterior, Kuraray Co. Ltd., Osaka, Japan) cured against a Mylar matrix strip to create a baseline surface. The average surface roughness was measured using a surface profilometer (Surftest 211, Mitutoyo, Japan) in five different positions on each sample before and after finishing with one of the two finishing systems [Sof-Lex discs (3M) and Po-Go (Dentsply)]. The obtained data were analyzed by two-way analysis of variance (ANOVA) at a p=0.05 significance level. Results There were statistically significant differences in the average surface roughness (Ra, ìm) between the Mylar matrix strip, Sof-Lex discs, and Po-Go discs (p<0.05). For all tested materials, the Mylar matrix strip provided smoother surfaces than both of the finishing systems (p<0.05). When the finishing discs were compared, Sof-Lex discs produced a smoother surface than Po-Go discs for all tested materials (p<0.05). Conclusion The Mylar matrix strip provided a smoother surface than Sof-Lex and Po-Go discs. Furthermore, Sof-Lex discs produced smoother surfaces than Po-Go discs. Sof-Lex and Po-Go systems produced clinically acceptable surface roughness for microfill, hybrid, and packable composite resin materials. The effect of finishing and polishing systems on surface roughness was dependent on both the system and the composite resin restorative material. Citation Üçtaşli MB, Arisu HD, Ömürlü H, Eligüzeloğlu E, Özcan S, Ergun G. The Effect of Different Finishing and Polishing Systems on the Surface Roughness of Different Composite Restorative Materials. J Contemp Dent Pract 2007 February;(8)2:089-096.

The extinction time of a general birth and death process with catastrophes

1986 ◽  
Vol 23 (04) ◽  
pp. 851-858 ◽  
Author(s):  
P. J. Brockwell
Keyword(s):  
Laplace Transform ◽  
Size Distribution ◽  
Sufficient Conditions ◽  
Necessary And Sufficient Conditions ◽  
Death Process ◽  
Extinction Time ◽  
Birth And Death Process ◽  
Different Types ◽  
The Laplace Transform ◽  
Necessary And Sufficient

The Laplace transform of the extinction time is determined for a general birth and death process with arbitrary catastrophe rate and catastrophe size distribution. It is assumed only that the birth rates satisfyλ0= 0,λj&gt; 0 for eachj&gt; 0, and. Necessary and sufficient conditions for certain extinction of the population are derived. The results are applied to the linear birth and death process (λj=jλ, µj=jμ) with catastrophes of several different types.

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