Caries-preventive potential of an adhesive patch after thermomechanical loading--a microbial-based in vitro study.
OBJECTIVE
To assess the enamel-protective potential of a newly devised adhesive patch for smooth enamel sealing.


METHODS
Approximal surfaces of 30 extracted molars were divided into three areas: the buccal thirds were treated with a flowable composite (Tetric Flow, Ivoclar Vivadent) and served as negative control sites, the lingual thirds were left untreated and served as positive control sites, and the middle thirds served as the test areas. This was sealed with either 1. a twofold application of an unfilled resin (Heliobond, Ivoclar Vivadent), 2. an adhesive prototype patch (Ivoclar Vivadent), or 3. an adhesive patch in combination with a flowable composite. After thermomechanical loading and demineralization in a microbial-based artificial caries chamber, demineralization depth was assessed using a confocal laser scanning microscope.


RESULTS
Negative control sites treated with the flowable composite showed no signs of demineralization. Areas treated with the patch showed no signs of demineralization, irrespective of whether it was used in combination with a flowable composite or directly bonded to the enamel. Caries-like lesions in untreated sites showed a mean depth of 134.3 +/- 35.9 microm. Demineralization depth at sites treated with the unfilled resin was 76.2 +/- 26.5 microm (p = 0.023).


CONCLUSIONS
Under the conditions of the present study, the adhesive patch under investigation completely protected the underlying enamel from demineralization. This merits further study to assess its potential as an interproximal sealant.
Clinic for Preventive Dentistry, Periodontology and Cariology, Center for Dental and Oral Medicine and Cranio-Maxillofacial Surgery, University of Zürich, Plattenstrasse 11, 8028 Zürich, Switzerland. patrick.schmidlin@zzmk.unizh.ch
Patrick R
PR
Schmidlin
Ilja
I
Klück
Jörg
J
Zimmermann
Jean-François
JF
Roulet
Rainer
R
Seemann
D000269:Adhesives / Q000627:therapeutic use*; D018441:Biofilms / Q000187:drug effects / Q000254:growth & development; D003188:Composite Resins / Q000737:chemistry; D003731:Dental Caries / Q000382:microbiology / Q000517:prevention & control*; D017220:Dentin-Bonding Agents / Q000737:chemistry; D006358:Hot Temperature; D006801:Humans; D010895:Pit and Fissure Sealants / Q000737:chemistry*; D017001:Tooth Demineralization / Q000517:prevention & control
D000269:Adhesives; D003188:Composite Resins; D017220:Dentin-Bonding Agents; D010895:Pit and Fissure Sealants; C111840:flowable hybrid composite