Color Stability of Two Novel Provisional Restorative Materials with and Without Polishing
Amir MamdouhHarhash;
Abstract
This study was designed to investigate the color stability of two communally available provisional restorative materials namely; CAD/CAM and Auto-Cure Bis Acrylic. Moreover; to investigate the effect of polishing of these materials; on color stability through immersion in different solutions; Coffee, Coca Cola and Mouthwash, at different time intervals.
Sixty specimens of the two tested provisional materials were prepared. Thirty discoid specimens were prepared from CAD/CAM Temp Composite (CCT) by milling ceramic blocks in the CAD/CAM machine (2mm thickness and 10mm in diameter). The other thirty discoid specimens of the Auto-Cure Bis Acrylic Temp (ACT) were prepared by packing the mixed material into a specially prepared disc shaped Teflon mold with the same size according to the manufacturer's instructions. Half of the specimens were polished by successive rubber cups with low speed contra, and the other half was kept without polishing.
The prepared specimens were then randomly divided into two equal groups, of 30 specimens each, according to the material used (M). Group 1 (M1) was cut from (CCT), while Group 2 (M2) was filled with (ACT). Each group was further allocated to two equal subgroups according to surface treatment done using the finishing Kit (P); subgroup (P0) received no polishing and the other half subgroup (P1) were finished and polished. For staining assessment, further three subclasses were grouped according to the stain used (S); class 1 (S1) was immersed into Coffee, (S2) was immersed into Coca Cola and (S3) was immersed into Mouth wash for 10 minutes every day for a month in each staining solution, then 2 months, and then 3 months. Specimens were washed with tap water for one minute after immersion in the staining solutions, and then they were dried with absorbent paper, kept dry in their containers for the next day till immersion again in the staining solution. The measurement of the final color was carried out at the end of each aging time using the Easyshade Spectrophotometer.
Sixty specimens of the two tested provisional materials were prepared. Thirty discoid specimens were prepared from CAD/CAM Temp Composite (CCT) by milling ceramic blocks in the CAD/CAM machine (2mm thickness and 10mm in diameter). The other thirty discoid specimens of the Auto-Cure Bis Acrylic Temp (ACT) were prepared by packing the mixed material into a specially prepared disc shaped Teflon mold with the same size according to the manufacturer's instructions. Half of the specimens were polished by successive rubber cups with low speed contra, and the other half was kept without polishing.
The prepared specimens were then randomly divided into two equal groups, of 30 specimens each, according to the material used (M). Group 1 (M1) was cut from (CCT), while Group 2 (M2) was filled with (ACT). Each group was further allocated to two equal subgroups according to surface treatment done using the finishing Kit (P); subgroup (P0) received no polishing and the other half subgroup (P1) were finished and polished. For staining assessment, further three subclasses were grouped according to the stain used (S); class 1 (S1) was immersed into Coffee, (S2) was immersed into Coca Cola and (S3) was immersed into Mouth wash for 10 minutes every day for a month in each staining solution, then 2 months, and then 3 months. Specimens were washed with tap water for one minute after immersion in the staining solutions, and then they were dried with absorbent paper, kept dry in their containers for the next day till immersion again in the staining solution. The measurement of the final color was carried out at the end of each aging time using the Easyshade Spectrophotometer.
Other data
| Title | Color Stability of Two Novel Provisional Restorative Materials with and Without Polishing | Other Titles | ثبات لون إثنين من المواد المؤقته الحديثه مع التلميع وبدونه | Authors | Amir MamdouhHarhash | Issue Date | 2015 |
Recommend this item
Similar Items from Core Recommender Database
Items in Ain Shams Scholar are protected by copyright, with all rights reserved, unless otherwise indicated.