Statement of the Problem: PIT AND FISSURE sealant placement is considered as an effective modality for prevention of caries on occlusal surfaces. Penetration, retention AND lateral wall adaptation are the key factors in success of PIT AND FISSURE sealant restorations. Purpose: The purpose of this paper was to compare penetration ability AND lateral wall adaptation of three commercially available PIT AND FISSURE SEALANTS. Materials AND Method: The present in-vitro study was done on 45 extracted sound human molars to evaluate the FISSURE pattern AND assess the penetration ability of three commercially available SEALANTS [Delton® FS Sealant (Dentsply DeTrey GmbH, Konstanz, Germany), Clinpro™ Sealant (3M™ ESPE™ , Minnesota, USA) AND GC Fuji VII Glass Ionomer Cement (GC Asia Dental Pte Ltd, Singapore)] on molars divided into 3 equal groups of 15 each, with further sectioning of each sample into 2 parts giving 30 samples per group. Following thermocycling AND embedding of teeth in clear auto-polymerizing acrylic resin, sections were evaluated for FISSURE morphology, sealant penetration, unfilled space, lateral wall adaptation, AND for presence of voids. Results: Penetrability of all the SEALANTS studied was found to be significantly more in U-type FISSURE pattern (93. 89%) followed by V-type (78. 62%), IK-type (74. 34%) AND then in I-type (65. 91). The depth of penetration of the GC Fuji VII Glass Ionomer sealant (85. 82%) was found to be superior followed by unfilled resin sealant (Clinpro™ Sealant-78. 26%) AND then by filled resin sealant (Delton® FS Sealant-74. 89%). Conclusion: U-type FISSURE pattern was more common than other FISSURE patterns AND showed significantly higher penetrability of different type of SEALANTS evaluated in the present study. GIC based sealant, due to significantly higher penetration depth than unfilled AND filled SEALANTS used in the present study, can be preferred over filled or unfilled resin SEALANTS.

Objectives: DesPITe the increasing use of Internet, there is no supervision over the accuracy AND quality of the information provided in the web. To deal with this problem, health specialists should take part in planning, publishing AND supervision of online health-related information. The aim of this study was to evaluate the quality of information related to PIT AND FISSURE SEALANTS in Persian websites.Materials AND Methods: In this cross-sectional study, Persian websites providing information about FISSURE SEALANTS were found using Google search engine. The searched keywords according to the MeSH database were "patient education" AND "FISSURE sealant". After applying the exclusion criteria, 37 websites out of 500 initial links remained in the study. These websites were evaluated based on a researcher-made checklist. The validity AND reliability of the checklist were evaluated AND confirmed. Descriptive analysis was applied to report the results of our study using SPSS version 11.5.Results: The average score for the quality of information was 22.46 out of 38. The minimum scores were 16 AND 30 AND belonged to Pezeshkanemrooz.com AND Asa85.blogfa.com, respectively. The results showed that 62.2% of the answers were scored 2-4 AND 37.8% were scored 1, therefore, the overall quality of the published content was rated to be moderate for 62.2% AND low for 37.8% of the websites.Conclusions: Overall, the quality of information related to FISSURE sealant provided in Persian websites was good, however, the information given was mostly incomplete AND could be improved. The main problems were doubtful credibility AND outdated information.

Statement of the Problem: The purpose of placing SEALANTS is to inhibit caries by physical closure of the PITs AND FISSUREs of teeth. A device named DIAGNOdent is useful in detecting occlusal caries by employing laser fluorescence (LF). However, there are contradictory results in the influence of SEALANTS on LF measurements.Purpose: The aim of this study is to investigate the effects of two different types of FISSURE SEALANTS on LF measurements.Materials AND Method: In this in vitro study, 86 extracted permanent third molars were divided rANDomly into two groups AND clear or opaque sealant was applied on the occlusal surfaces. Two examiners performed pre AND post-seal fluorescence measurements twice with one week interval by employing DIAGNOdent device. Finally, measured values were evaluated through the statistical paired t-test by means of SPSS 17 software.Results: The mean value of LF measurements increased significantly due to the application of clear sealant (p=0.001) while the statistical changes in this measurement is negligible after applying opaque sealant (p=0.311).Conclusion: Clear SEALANTS increase the LF measured values but opaque SEALANTS cause almost no changes. Therefore DIAGNOdent device is not reliable for detecting caries beneath the clear sealant.