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. 2023 Jun;27(6):2595-2607.
doi: 10.1007/s00784-022-04816-z. Epub 2022 Dec 11.

Influence of dental prophylaxis procedures on the tooth veneer interface in resin-based composite and polymer-infiltrated ceramic veneer restorations: an in vitro study

Lena Unterschütz #  1 , Florian Fuchs #  2 , Laura-Antonia Mayer  1 , Andreas Koenig  1 , Nadia Challakh  3 , Ellen Schulz-Kornas  3 , Dirk Ziebolz #  3 , Sebastian Hahnel #  4
Affiliations

Influence of dental prophylaxis procedures on the tooth veneer interface in resin-based composite and polymer-infiltrated ceramic veneer restorations: an in vitro study

Lena Unterschütz et al. Clin Oral Investig. 2023 Jun.

Abstract

Objectives: The aim of this study was to investigate the influence of dental prophylaxis cleaning procedures and artificial aging on veneers in human teeth. The external marginal and internal tooth veneer as well as the restoration surfaces were examined.

Material and methods: Thirty-two extracted premolars were restored with resin-based composite (RBC) and polymer-infiltrated ceramic network (PICN) veneers. Artificial aging by alternating thermocycling and subsequent prophylaxis procedure (glycine-based powder air polishing or ultrasonic scaling) was conducted for five consecutive cycles. The external marginal interface was examined by height profile measurements and the internal interface was investigated using micro X-ray computed tomography. In addition, the surface texture of the veneer surface was analyzed using confocal laser scanning microscopy.

Results: The application of both prophylaxis procedures resulted in a deepening of the marginal interface (10 µm ± 8 µm) for materials. Furthermore, the internal interface of PICN restorations showed marginal gaps after both treatments and artificial aging (16 µm ± 3 µm). In contrast to the RBC specimens, a significant increase in surface roughness was identified for PICN veneers after ultrasonic scaling.

Conclusions: The marginal and internal interface regions in veneers fabricated from PICN and RBC were affected by prophylaxis procedures. Furthermore, it may result in increased veneer surface roughness, especially in PICN and after ultrasonic scaling, which might affect bioadhesion and longevity.

Clinical relevance: After dental prophylaxis procedures, examination of the marginal and the internal interface as well as the veneer surface provides a precise insight into damage mechanisms and offers an assessment of longevity.

Keywords: Air polishing; Interface; Surface analysis; Ultrasonic scaling; Veneer.

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Conflict of interest statement

The authors declare no competing interests.

Figures

Fig. 1
Fig. 1
Overview of sample preparation. Accelerated aging including prophylactic treatment and analytical procedures for analysis of the marginal and internal interface (transition area between veneer, adhesive, and tooth structure) as well as the veneer surface
Fig. 2
Fig. 2
Visual appearance of the interface tooth veneer of resin-based composite (RBC) and polymer-infiltrated ceramic network material (PICN) veneer surfaces (3D models of S-F surfaces) prior to and after exposure to dental prophylaxis procedure
Fig. 3
Fig. 3
µXCT sectional images of a specimen with veneer (V), adhesive layer (A), enamel (E), dentin (D), and background (B) with an enlarged region of interest (ROI) of the µXCT datasets of a polymer-infiltrated ceramic network material (PICN) veneer before (t0) and after (tE) treatment; left: treated with air polishing, right: treated with ultrasonic scaling; yellow box: a gap (yellow arrow) formed between veneer and adhesive layer in both (tE) specimens
Fig. 4
Fig. 4
Selected sectional images of a µXCT dataset of a resin-based composite (RBC) veneer with veneer (V), adhesive layer (A), enamel (E), dentin (D), and background (B) before (t0) (upper row) and after (tE) (lower row) ultrasonic scaling with visible alternations/damages in the lower interface area (yellow arrows)
Fig. 5
Fig. 5
Visual appearance of the surface measurements of resin-based composite (RBC) and polymer-infiltrated ceramic network (PICN) veneers (3D models of S-F surfaces) prior to and after dental prophylaxis procedures by ultrasonic scaling or glycin-based powder air polishing
See this image and copyright information in PMC

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