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 Table of Contents  
ORIGINAL STUDY COMPETITION
Year : 2018  |  Volume : 18  |  Issue : 5  |  Page : 10-11

OSC9: Colour stability and matching accuracy of custom dual laminated composite resin shade guide


Date of Web Publication31-Oct-2018

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DOI: 10.4103/0972-4052.244598

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How to cite this article:
... OSC9: Colour stability and matching accuracy of custom dual laminated composite resin shade guide. J Indian Prosthodont Soc 2018;18, Suppl S1:10-1

How to cite this URL:
... OSC9: Colour stability and matching accuracy of custom dual laminated composite resin shade guide. J Indian Prosthodont Soc [serial online] 2018 [cited 2018 Nov 20];18, Suppl S1:10-1. Available from: http://www.j-ips.org/text.asp?2018/18/5/10/244598



Mohd Zulkifli Kassim1, Siti Nadia Rahimi1, Muhamad Asyraf Berhanuddin2, Siti Mariam Ab Ghani1, Tong Wah Lim1

1Centre for Restorative Dentistry Studies, Faculty of Dentistry, Universiti Teknologi MARA, Selangor, Malaysia, 2Klinik Pergigian Padang Tengku, Ministry of Health, Malaysia.

Aims: Custom-dual-laminated shade guides are used to mimic closely the material and layering technique used in final restoration. This study aims to determine optimal time duration for custom-dual-laminated composite resin shade guides to reach colour stability after polymerization and to compare their colour matching accuracy with the conventional shade guides.

Materials and Methods: 18 incisor shaped dual-laminated resin composite specimens from two commercially available composite resin materials; Group 1 (Ceram. X® One Enamel & Dentine) and Group 2 (Filtek™ Z350 XT) were prepared into shade A2, A3 and A3.5 according to manufacturers’ instruction. Colour measurement done with spectrophotometer CIELab system immediately after polymerization (t0), 24 hours (t1), 7 days (t7), 14 days (t14) and 21 days (t21). The average values were obtained to calculate Δ between the specimens and Vitapan classical shade guide at each post-curing time. Data was analysed using repeated measure ANOVA (SPSS 24) and acceptability threshold (Δ ≤ 3.3) were used to determine matching accuracy.

Results: Δ were significant for all specimens until 24 hours for Group 1 and 7 days for Group 2. At the optimal time period, all specimen showed Δ values greater than acceptability threshold (Δ ≤ 3.3) except for Group 2 A2 shade.

Conclusions: Colour stability of custom shade guides were reached at 24 hours for Group 1 and 7 days for Group 2 after polymerization. Only Group 2 A2 shade was accurately matched relative to conventional shade guides emphasizing the importance of using custom dual laminated shade guide for multi-layering technique.






 

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