Journal title
عنوان نشریه
Journal of Dentomaxillofacial
Literature & Humanities
http://3dj.gums.ac.ir
1
admin
doi
en
jalali
1396
9
1
gregorian
2017
12
1
6
4
online
1
fulltext
fa
A Comparative Study of Shear Bond Strength of Bulk-Fill Composites, Packable and Flowable, as Well as Conventional Light-Curing Composite
Surgery
Surgery
پژوهشي
Original article
<div style="text-align: justify;"><strong>Introduction:</strong> This study aimed to compare the Shear Bond Strength (SBS) of two bulk-fill composites versus a conventional resin composite.<br>
<strong>Materials and Methods: </strong>In this study, 60 sound extracted human premolars were selected and sectioned horizontally from one-third of the coronal crown to expose dentin using a low-speed cutting saw. The dentin bonding agent was applied to all specimens, then they were randomly divided into three groups based on their corresponding composites: Group I: Bulk-fill packable (x-tra fil, Voco, Germany); Group II: Bulk-fill flowable (x-tra base, Voco, Germany); and Group III: Conventional (Grandio, Voco, Germany). Subsequently, composite samples with a diameter of 2.5 mm and height of 4 mm were prepared. Following thermocycling (1500 cycles, 5°C -55°C), SBS testing was performed by a universal testing machine. Then, the specimens were examined for the type of fracture (adhesive, cohesive, or mixed) under a stereomicroscope at 20X magnification. Data were analyzed using 1-way ANOVA and Tukey post-hoc test in SPSS. <br>
<strong>Results:</strong> The highest bond strength was observed in group III (52.99±6.07) and the lowest bond strength was observed in group II (49.11±4.86). There was no statistically significant difference between the packable and flowable groups in terms of SBS (P=0.19). Statistically significant differences were detected between group I and group III (P=0.005) as well as group II and group III (P=0.000). The majority of the fractures observed in all three groups were of adhesive type.<br>
<strong>Conclusion:</strong> Conventional composites produced significantly better results in comparison with bulk-fill composites as far as SBS was concerned. Therefore, it is advisable to continue the use of bulk-fill materials incrementally in dental treatment.</div>
Composites, Dentin, Shear Bond Strength (SBS)
115
122
http://3dj.gums.ac.ir/browse.php?a_code=A-10-1-145&slc_lang=fa&sid=1
Seyedeh Maryam
Tavangar
0000-0003-2221-5531
No
Assistant Professor, Department of Restorative Dentistry, Dental Sciences Research Center, Guilan University of Medical Sciences, Rasht, Iran.
Yasaman
Sadeghi
No
Assistant Professor, Department of Restorative Dentistry, Dental Sciences Research Center, Guilan University of Medical Sciences, Rasht, Iran.
Reza
Davalloo
No
Assistant Professor, Department of Restorative Dentistry, Dental Sciences Research Center, Guilan University of Medical Sciences, Rasht, Iran.
Farideh
Darabi
No
Assistant Professor, Department of Restorative Dentistry, Dental Sciences Research Center, Guilan University of Medical Sciences, Rasht, Iran.
Shima
Mahmudi
shima70@gmail.com
0000-0003-0853-2493
Yes
Postgraduate Student, Department of Restorative Dentistry, School of Dentistry, Guilan University of Medical Sciences, Rasht, Iran.
Somaye
Seyednejad
No
Dentist, School of Dentistry, Guilan University of Medical Sciences, Rasht, Iran.