title: In vitro evaluation of marginal leakage using invasive and noninvasive technique of light cure glass ionomer and flowable polyacid modified composite resin used as pit and fissure sealant.
abstract: OBJECTIVE
  This study compared the microleakage of light cure glass ionomer and flowable compomer as pit and fissure sealant, with and without tooth preparation.
  
  
  METHODS
  One hundred premolars that were extracted for orthodontic purpose were used. After adequate storage and surface debridement, the teeth were randomly divided into four groups. In Group I and III, the occlusal surfaces were left intact, while in Group II and Group IV, tooth surfaces were prepared. Teeth in Group I and Group II were sealed with Light cure glass ionomer, whereas flowable compomer was used to seal teeth in Group III and IV. The sealed teeth were then immersed in dye. Subsequently, buccolingual sections were made and each section was examined under stereomicroscope for microleakage followed by scoring.
  
  
  RESULTS
  In group I, microleakage score ranged from 2 to 4 with mean of 3.64 (±0.757), while in group II the range was observed to be 1-4 with mean of 2.88 (±1.236). Group III recorded a range of 0-4 with the mean of 2.20 (±1.443) while 0-2 and 0.60 (±0.707) being the range and mean observed, respectively, for group IV.
  
  
  CONCLUSIONS
  Flowable compomer placed after tooth preparation showed better penetration and less marginal leakage than the light cure glass ionomer.
authors: Department of Pedodontics and Preventive Dentistry, Rayat Bahra Dental College, Mohali, Chandigarh, India. anshu4@gmail.com
authors: Anshu
authors: A
authors: Singla
authors: Shalini
authors: S
authors: Garg
authors: Sanjeev Kumar
authors: SK
authors: Jindal
authors: H P
authors: HP
authors: Suma Sogi
authors: Deepak
authors: D
authors: Sharma
mesh_terms: D000134:Acid Etching, Dental / Q000379:methods; D000180:Acrylic Resins / Q000737:chemistry; D004396:Coloring Agents; D020770:Compomers / Q000737:chemistry* / Q000528:radiation effects; D055117:Curing Lights, Dental; D003763:Dental Leakage / Q000145:classification*; D005899:Glass Ionomer Cements / Q000737:chemistry* / Q000528:radiation effects; D006801:Humans; D008422:Materials Testing; D008751:Methylene Blue; D010756:Phosphoric Acids / Q000737:chemistry; D010895:Pit and Fissure Sealants / Q000737:chemistry* / Q000528:radiation effects; D019279:Resin Cements / Q000737:chemistry / Q000528:radiation effects; D012117:Resins, Synthetic / Q000737:chemistry / Q000528:radiation effects; D013696:Temperature; D013997:Time Factors; D019246:Tooth Preparation / Q000379:methods
chemical_list: D000180:Acrylic Resins; D004396:Coloring Agents; D020770:Compomers; C477384:Dyract Flow Compomer; C079765:Fuji II LC cement; D005899:Glass Ionomer Cements; D010756:Phosphoric Acids; D010895:Pit and Fissure Sealants; D019279:Resin Cements; D012117:Resins, Synthetic; C006903:carbopol 940; C030242:phosphoric acid; D008751:Methylene Blue