Micro-CT observations of the adaptation at gingival wall in ClassⅡrestorations with different dental restorative materials
10.3969/j.issn.1671-167X.2015.02.025
- VernacularTitle:不同牙体修复材料与Ⅱ类洞龈壁适合性的显微CT 观察
- Author:
Jie NIE
;
Xiaoyan WANG
;
Xuejun GAO
- Publication Type:Journal Article
- Keywords:
Dental materials;
Dental prosthesis;
Dental cavity;
Gingival layer;
X-ray microto-mography
- From:
Journal of Peking University(Health Sciences)
2015;(2):317-320
- CountryChina
- Language:Chinese
-
Abstract:
Objective: To evaluate the adaptation of different materials for gingival layer in Class Ⅱrestorations using Micro-CT.Methods:Eighteen extracted human premolars were selected, and ClassⅡcavities were prepared.The teeth were randomly divided into six groups and restored using layering tech-nique.Six materials were used for gingival layer, including four injectable materials:Beautifil Flow Plus F00 (F00), Beautifil Flow F10 (F10), Filtek Z350 Flowable (Z350F), FujiⅡLC CAPSULE (Fuji), and two packable materials: BeautifilⅡ (BF), Filtek Z350 (Z350).The restored teeth were scanned with micro-CT and the images were 3D reconstructed to evaluate the volumes and the distribution of the voids on the restoration-tooth interface of the gingival layer.The volume of the voids were statistically analyzed using nonparametric Jonckheere-Terpstra tests.Results: The volumes ( mm3 ) of the voids on the restoration-tooth interface were: Z350F (0.000 15), F10 (0.000 39), F00 (0.012), Fuji (0.070), Z350 (0.16) and BF (0.20).There were significant differences between Z350F/F10 and Fuji/Z350/BF (P<0.05).Most of the voids were found on the point-line angles of the cavities.Con-clusion:The voids on the restoration-tooth interface were mainly on the point-line angles of the cavities. Injectable materials with high flowablility could reduce the restoration-tooth interface voids significantly when used for the gingival layer in ClassⅡrestorations.
