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Quintessence Publishing: Journals: QI
Quintessence International

Edited by Eli Eliav

ISSN 0033-6572 (print) • ISSN 1936-7163 (online)

September 1999
Volume 30 , Issue 9

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A clinical, radiographic, and scanning electron microscopic evaluation of adhesive restorations on carious dentin in primary teeth

Cecília C. C. Ribeiro, DDS, MS/Luiz N. Baratieri, DDS, MS, PhD/Jorge Perdigão, DMD, MS, PhD/Naira M. M. Baratieri, DDS, MS, PhD/André V. Ritter, DDS

Pages: 591-599
PMID: 10765864

Objective: The purpose of this project was to evaluate the performance of a dentin adhesive system on carious and noncarious primary dentin in vivo. Method and materials: Forty-eight primary molars with carious lesions were randomly assigned to 2 different treatments: group 1 (control, n = 24)--All identifiable, irreversibly infected dentin was removed prior to the application of the bonding agent and restorative material; group 2 (experimental, n = 24)--Irreversibly infected dentin was partially removed prior to the application of the bonding agent and restorative material. The control and experimental teeth were clinically monitored every 3 months and evaluated 12 months after restoration. The teeth were extracted around the time of exfoliation and processed for scanning electron microscopy. Results: Retention rate, marginal integrity, and pulpal symptoms were identical in both groups. Radiographically, the radiolucent area associated with the experimental restorations did not increase with time in 75% of the cases. For the control group, the adhesive system formed a hybrid layer. In the experimental group, there was morphologic evidence of the formation of an acid-resistant ’altered hybrid layer.’ An acid-resistant tissue, resulting from the interdiffusion of adhesive resin within the area of carious dentin, was observed adjacent to and under the altered hybrid layer. Conclusion: Application of an adhesive restorative system to irreversibly infected dentin did not affect the clinical performance of the restoration.

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