Scholz, Konstantin J. and Hinderberger, Michael and Widbiller, Matthias and Federlin, Marianne and Hiller, Karl-Anton and Buchalla, Wolfgang (2020) Influence of selective caries excavation on marginal penetration of class II composite restorations in vitro. EUROPEAN JOURNAL OF ORAL SCIENCES, 128 (5). pp. 405-414. ISSN 0909-8836, 1600-0722
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Selective caries excavation may support pulp preservation. This in vitro study investigated the influence of selective removal of demineralized dentin on marginal integrity of composite restorations as determined by dye penetration. Dentinal caries-like lesions were produced in the approximal surfaces of 40 extracted human molars (ethylenediaminetetraacetate, 0.5 M, 96 h). The following test procedures were established: complete excavation, selective excavation, and caries-free control. Two class II cavities with enamel at the cervical margins were prepared per tooth and demineralization volume was determined by micro-computed tomography for the purpose of a stratified distribution to receive complete excavation or selective excavation. After complete or selective excavation (30 cavities each), adhesive composite restorations were placed. Cavities without demineralized dentin (20 cavities) served as control. The marginal integrity of restorations was evaluated by dye penetration with and without thermocycling or mechanical loading. Results were analyzed by non-parametrical statistical tests (Mann-WhitneyUTest) with an alpha = 0.05 level of significance. Dye penetration did not differ significantly among completely excavated, selectively excavated, or undemineralized teeth, but was increased by thermocycling and mechanical loading in all experimental groups. Selective caries removal did not increase marginal penetration in class II restorations. The presence of remaining demineralized dentin surrounded by sound dentin did not impair marginal integrity of restorations with margins placed in sound enamel.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | PARTIAL CERAMIC CROWNS; BOND STRENGTH; CARIOUS DENTIN; INTEGRITY; ENAMEL; HARDNESS; LESIONS; TEETH; MICROLEAKAGE; CAVITY; dental bonding; dental caries; dental cavity preparation; permanent dental restorations |
| Subjects: | 600 Technology > 610 Medical sciences Medicine |
| Divisions: | Medicine > Lehrstuhl für Zahnerhaltung und Parodontologie |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 17 Mar 2021 08:23 |
| Last Modified: | 17 Mar 2021 08:23 |
| URI: | https://pred.uni-regensburg.de/id/eprint/44059 |
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