Sealing Manifest Occlusal Caries Lesions in the Permanent Dentition

Background: The first restoration is fatal for the prognosis of the tooth. Studies have shown that caries progression can be stopped with a tight sealing which may even lead to re-mineralization of lesions.

Aim: To investigate the possibility of treating manifest occlusal caries with non-invasive sealing instead of conventional resin restoration.

Study design: the study is carried out as a prospective, randomized clinical study (RCT). Primary, occlusal caries lesions in 521 patients, aged 6-17 years old were treated by non-invasive resin based sealing (n= 368) or resin based restoration (n=153). The dentists or patients were not free to choose the treatment type. Randomization between sealing and restoration (2:1) was made by computer for each practitioner at the University of Copenhagen and kept at the clinics in sealed envelopes. The treatments are examined clinically and radiographically after 1, 2, 3, 5, 7 and 10 years. The treatments are performed and controlled by 68 general practitioners from Public Dental Health Care Service in 9 Danish municipalities.

Sealing: The dentists use material of own choice, and follow their usual clinical procedures based on the instructions from the manufacturer and the guidelines from The Department of Cariology and Endodontics, University of Copenhagen.

Restoration: The dentists use preparation design and material of own choice, and follow their usual clinical procedures based on the instructions from the manufacturer and the guidelines from The Department of Cariology and Endodontics, University of Copenhagen.

The prevalence of regression, arrest and progression of sealed and restored caries lesions, are computed and related to the clinical and radiological registrations of patient, dentist or treatment related factors for assessing of statistically significant correlations.

The influence of each factor on the quality, longevity and need for retreatment of occlusal sealants and restorations, will be assessed using non-parametric tests and Kaplan-Meier survival analyses for statistical treatment of data, supplemented with summarizing multivariate survival analyses such as the Cox regression model and discriminatory analyses.

Inclusion criteria

• each patient should have one manifest occlusal caries lesion in need of restorative treatment
• the radiographic depth of the lesion should be limited to half through the dentin
• written informed consent from children and parents should be obtained before treatment

Exclusion criteria

• when the occlusal lesion had communication with an approximal caries lesion or occlusal/approximal restoration
• the tooth was hypomineralized
• in case of serious chronic diseases affecting the caries experience and activity