Akademik Veri Yönetim Sistemi
International Dental Journal, cilt.65, ss.104, 2015 (SCI-Expanded)
Aim and purpose: The aim of this in vitro study was to evaluate
the effects of different placement techniques and different restorative techniques on the microleakage with tooth clearing method in
Class II cavities.
Materials and method: Class II slot cavities (randomized on mesial
or distal surfaces, 4 mm width, 5 mm height and 2 mm depth)
were prepared on 50 sound nonerupted human third molars. The
cavities were bonded with Scotchbond MP etch-and-rinse adhesive
(3M ESPE) and were randomly divided into 5 groups (n = 10)
according to the restorative techniques. Filtek Ultimate Universal
nanohybrid composite and Filtek Ultimate Flow (3M ESPE) were
used to restore all cavities. Group 1: Bulk, Group 2: Horizontal,
Group 3: Oblique, Group 4: Horizontal, Indirect Polymerization
(on replica), Luting with Flowable Composite, Group 5: Oblique,
Indirect Polymerization (on replica), Luting with Flowable Composite. The specimens were thermocycled (500x) and immersed in
50% silver nitrate solution for 24 h. Microleakage on the gingival
and proximal walls were evaluated with a stereomicroscope and
calculated in the form of area after the application of decalcification and clearing method. Data were analyzed with Kruskal-Wallis
and Mann-Whitney U-test (p < 0.001).
Results: Placement techniques and the usage of indirect polymerisation luted with flowable composite significantly reduced microleakage. There was no significant difference between the placement
techniques but less microleakage scores were determined by using
oblique placement technique. The significant fewer microleakage
scores were determined in the Group 4 and Group 5.
Summary and conclusions: Microleakage was observed in all
groups. Indirect polymerisation technique combined with flowable
composite were reduced microleakage.