title: Evaluation of Gingival Microleakage in Class II Composite Restorations with Different Lining Techniques: An In Vitro Study.
abstract: Aim. To compare the microleakage in class II composite restorations without a liner/with resin modified glass ionomer and flowable composite liner. Method. Forty standardized MO cavities were prepared on human permanent mandibular molars extracted for periodontal reasons and then divided into 4 groups of ten specimens. The cavity preparations were etched, rinsed, blot dried, and light cured and Adper Single Bond 2 is applied. Group 1 is restored with Filtek P60 packable composite in 2 mm oblique increments. Group 2 is precure group where 1 mm Filtek Z350 flowable liner is applied and light cured for 20 sec. Group 3 is the same as Group 2, but the liner was cocured with packable composite. In Group 4, 1 mm RMGIC, Fuji Lining LC is applied and cured for 20 sec. All the teeth were restored as in Group 1. The specimens were coated with nail varnish leaving 1 mm around the restoration, subjected to thermocycling, basic fuchsin dye penetration, sectioned mesiodistally, and observed under a stereomicroscope. Results. The mean leakage scores of the individual study groups were Group 1 (33.40), Group 2 (7.85), Group 3 (16.40), and Group 4 (24.35). Group 1 without a liner showed maximum leakage. Flowable composite liner precured was the best.
authors.affiliation: Department of Conservative Dentistry and Endodontics, Dayananda Sagar College of Dental Sciences, Bangalore 560 078, India.
authors.forename: Vedavathi
authors.initials: V
authors.lastname: Bore Gowda
authors.affiliation: Department of Conservative Dentistry and Endodontics, M.S. Ramaiah Dental College, Karnataka 560054, India.
authors.forename: B V
authors.initials: BV
authors.lastname: Sreenivasa Murthy
authors.affiliation: Department of Conservative Dentistry and Endodontics, M.S. Ramaiah Dental College, Karnataka 560054, India.
authors.forename: Swaroop
authors.initials: S
authors.lastname: Hegde
authors.affiliation: Department of Conservative Dentistry and Endodontics, Dayananda Sagar College of Dental Sciences, Bangalore 560 078, India.
authors.forename: Swapna Devarasanahalli
authors.initials: SD
authors.lastname: Venkataramanaswamy
authors.affiliation: Department of Conservative Dentistry and Endodontics, Dayananda Sagar College of Dental Sciences, Bangalore 560 078, India.
authors.forename: Veena Suresh
authors.initials: VS
authors.lastname: Pai
authors.affiliation: Department of Conservative Dentistry and Endodontics, Dayananda Sagar College of Dental Sciences, Bangalore 560 078, India.
authors.forename: Rashmi
authors.initials: R
authors.lastname: Krishna