Assessment of aging effects on porcelain repair systems discoloration

Introduction: The selection of porcelain is based on high biocompatibility, endurance, superficial texture and aesthetics. Nevertheless, the innate fracture charateritics of porcelain is the main cause of the intra oral fractures. Electing a suitable porcelain restorative system in terms of stabilit...

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Main Authors: Abdolhamid Alhavaz (Author), Homayoun Alaghemand (Author), Arash Poorsattar- Bejehmir (Author), Yashar Vakili (Author), Mashhad Odak (Author), Amir Rastar (Author)
Format: Book
Published: Babol University of Medical Sciences, 2013-03-01T00:00:00Z.
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100 1 0 |a Abdolhamid Alhavaz  |e author 
700 1 0 |a Homayoun Alaghemand  |e author 
700 1 0 |a Arash Poorsattar- Bejehmir  |e author 
700 1 0 |a Yashar Vakili  |e author 
700 1 0 |a Mashhad Odak  |e author 
700 1 0 |a Amir Rastar  |e author 
245 0 0 |a Assessment of aging effects on porcelain repair systems discoloration 
260 |b Babol University of Medical Sciences,   |c 2013-03-01T00:00:00Z. 
500 |a 2251-9890 
500 |a 2322-2395 
520 |a Introduction: The selection of porcelain is based on high biocompatibility, endurance, superficial texture and aesthetics. Nevertheless, the innate fracture charateritics of porcelain is the main cause of the intra oral fractures. Electing a suitable porcelain restorative system in terms of stability of color is important. For this reason, this study aimed to examine the color changes of common porcelain repair materials . Methods: Using a silicon mold, 30 pieces of feldspathic porcelain in A3 color, 10mm of diameter and 2 mm of thickness were prepared. The samples were randomly distributed into three groups : Group 1: Porcelain-Silane-Bonding-Composite Group 2: Porcelain-Silane-Bonding-Panavia F 2.0-Bonding-Silane-Porcelain Group 3: Porcelain-Silane-Bonding-Choice 2 -Bonding-Silane-Porcelain The aging process was accomplished with thermocyling (3000 cycles, 5/55 degree), incubation in 37&deg; and 100&deg; humidity. Thereafter, discoloration was assessed In CIE system via designation of color transforming matrix in MATLAB environment . Results: The average quantitative amount of discoloration at day 0, 90 and 180 were 76.8&plusmn;0.57, 79.15&plusmn;0.52, 80.13&plusmn;0.6 for Choice, 78.03&plusmn;0.9, 79.42&plusmn;0.82, 80.17&plusmn;0.51 for Panavia, and 78.41&plusmn;1.53, 79.59&plusmn;0.77, 81.03&plusmn;0.63 for Composite, respectively. The color changes by the time were significant for the all three groups (p<001).Calculating day 0-180 color changes, mean color differences for Choice, Panavia and Composite groups were 3.33&plusmn;0.83 , 2.13&plusmn;1.23, and 2.61&plusmn;1.6, respectively. The color changes did not differ in the studied groups (p<0.133). Conclusions: Post-aging color changes were significant, although all samples had color changes less than 3.5,Considering the clinical significance of color changes of more than 3.5, these results were acceptable and all three restorative materials could reliably be applied in the daily clinical use . 
546 |a EN 
690 |a Porcelain 
690 |a  Color changes 
690 |a  Digital photographer 
690 |a  CIE LAB color system 
690 |a Dentistry 
690 |a RK1-715 
655 7 |a article  |2 local 
786 0 |n Caspian journal of dental research, Vol 2, Iss 1, Pp 46-52 (2013) 
787 0 |n http://cjdr.ir/browse.php?a_code=A-10-91-3&slc_lang=en&sid=1 
787 0 |n https://doaj.org/toc/2251-9890 
787 0 |n https://doaj.org/toc/2322-2395 
856 4 1 |u https://doaj.org/article/f3f877463c93447f89ebf3fde7c10367  |z Connect to this object online.