fa Effect of Different Enamel Preparation Methods on Microleakage of Fissure Sealant: An In Vitro Study کودکان Pediatric Dentistry پژوهشي Research <p style="background-color: rgb(239, 243, 250)"><strong style="margin: 0px padding: 0px border: 0px"><i style="margin: 0px padding: 0px border: 0px">Objective: </i></strong>Lack of a dental material with optimal adhesion and sealability is an important challenge in modern dentistry leading to marginal leakage. There are controversies on the necessity of enamel preparation in pit and fissure sealant therapy and its effect on decreasing the microleakage therefore, the present <i style="margin: 0px padding: 0px border: 0px">in vitro</i>study aimed to assess the amount of microleakage with and without enamel preparation.</p><p style="background-color: rgb(239, 243, 250)"> <strong style="margin: 0px padding: 0px border: 0px"><i style="margin: 0px padding: 0px border: 0px"> Methods: </i></strong>In this experimental study, 30 sound premolars assigned suitable for sealant application, were chosen and randomly divided into two groups. Sealant was applied to all teeth with the same conventional technique. In group A, fissure sealant was applied without enamel preparation while in group B, sealant was applied after fissurotomy with bur. The teeth were thermocycled and microleakage was measured using silver nitrate as leakage tracer. The teeth were then cut into three bucco-lingual sections and examined under a stereomicroscope with 32 × magnification. The amount of dye penetration into the sealant was recorded in microns and the degree of microleakage was classified into four degrees of 0, 1, 2 and 3. T-test was applied for the comparison of data between the two groups.</p><p style="background-color: rgb(239, 243, 250)"> <strong style="margin: 0px padding: 0px border: 0px"><i style="margin: 0px padding: 0px border: 0px"> Results: </i></strong>In total,20% of specimens in group B (fissurotomy) had degree 1 and 80% had degree 0microleakage and no specimen had degrees 2 and 3 microleakage, while in group A (no preparation), 20% had degree 1, 33.3% had degree 2 and 46.7% had degree 3microleakage. No specimen had degree 0 microleakage. Therefore, placement of sealant with enamel preparation significantly decreased microleakage (P<0.001).</p><p style="background-color: rgb(239, 243, 250)"> <strong style="margin: 0px padding: 0px border: 0px"><i style="margin: 0px padding: 0px border: 0px"> Conclusion: </i></strong>In view of the findings of this investigation, it seems that enamel preparation reduces marginal leakage in pit and fissure sealant therapy.</p><hr><p class="MsoNormal" dir="rtl"><span lang="FA" style="font-family: Arial, sans-serif"><!--stripped--> <!--stripped--></span></p> <p class="MsoNormal" style="text-align: left direction: ltr unicode-bidi: embed"><b>Source: </b>Journal of Dental School Shahid Beheshti University of Medical Sciences </p> <p class="MsoNormal" style="text-align: left direction: ltr unicode-bidi: embed"><a href="http://jds.sbmu.ac.ir/browse.php?a_id=1345&sid=1&slc_lang=en" target="_blank"><font color="#0000ff">Full Text</font></a></p> Pit, fissure sealant, Tooth preparation, Microleakage, 0 0 http://idai.ir/browse.php?a_code=A-10-32-2934&slc_lang=fa&sid=1 Atefeh Pakdel a_pakdel@dentaliau.ac.ir 100319475328460013644 100319475328460013644 Yes Dept. of Pediatric Dentistry, Dental School, Islamic Azad University, Tehran, Iran Saman Partovi 100319475328460013645 100319475328460013645 No Elnaz Sadra 100319475328460013646 100319475328460013646 No Shahrzad Rezvani 100319475328460013647 100319475328460013647 No Dept. of Pediatric Dentistry, Dental School, Islamic Azad University, Tehran, Iran Naser Valayi 100319475328460013648 100319475328460013648 No Dental School, Islamic Azad University, Tehran, Iran Mojdeh Kalantar Motamedi 100319475328460013649 100319475328460013649 No