Comparison on polymerization of bulk-fill composite resins in different marginal thickness of tunnel restoration / SM Ab Ghani ... [et al.]

Ab Ghani, SM and Hassan, N S and Tamrin, A A and Lim, T W and Abu Hassan, M I and Ismail, M H (2018) Comparison on polymerization of bulk-fill composite resins in different marginal thickness of tunnel restoration / SM Ab Ghani ... [et al.]. Journal of Mechanical Engineering (JMechE), SI 8 (1). pp. 65-79. ISSN 18235514


Bulk-fill composite resins (BCR) was introduced with the advantage of 4-5mm depth of cured, thus an applicable material for a tunnel restoration. The study aimed to assess the polymerization of BCR with different marginal ridge thickness in tunnel restoration technique. Fifteen extracted teeth categorized into; G1=conventional proximal restoration (n:5), G2=tunnel 1.5mm marginal ridge thickness (n:5) and G3=tunnel 3.0mm marginal ridge thickness (n:5). Samples received the designated cavity preparation design and restored with BCR, embedded in resin and sectioned into halves. Each sample was tested with Vickers micro-hardness at the top (TP), middle (MP) and bottom part (BP) to get the micro-hardness value (VH). Data were statistically analyzed with 1-way ANOVA to compare means between groups and repeated measured ANOVA to compare means between the different areas. The mean micro-hardness (VH) value for top part (TP) G1=79.1, G2=77.3 and G3=74.9.; middle part (MP) G1=79.0, G2=73.3 and G3=74.9 and bottom part (BP) G1=71.1, G2=64.4 and G3=62.7. A decrease pattern of VH noted TP>MP>BP. No significant difference (p>0.05) VH for all groups for TP. For MP, significant difference (p<0.05) noted among the 3 groups and for BP, significant differences (p<0.05) between G1 to G2 and G3 only. In the same group, no statistical mean differences (p>0.05) were


Item Type: Article
Email / ID Num.
Ab Ghani, SM
Hassan, N S
Tamrin, A A
Lim, T W
Abu Hassan, M I
Ismail, M H
Subjects: T Technology > TA Engineering. Civil engineering > Engineering machinery, tools, and implements
T Technology > TJ Mechanical engineering and machinery
Divisions: Universiti Teknologi MARA, Shah Alam > Faculty of Mechanical Engineering
Journal or Publication Title: Journal of Mechanical Engineering (JMechE)
UiTM Journal Collections: UiTM Journal > Journal of Mechanical Engineering (JMechE)
ISSN: 18235514
Volume: SI 8
Number: 1
Page Range: pp. 65-79
Keywords: Micro-Hardness; Bulk-Fill Composite Resins; Tunnel Restoration Technique; Marginal Ridge.
Date: 2018
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