Abstract
This study was designed to evaluate the shear bond strength
(SBS) of posterior composite resin cores to tooth surface using
two dental adhesives and two retentive means.
Thirty extracted permanent molars were used for this purpose.
They were made flat by removing the occlusal one third
using “stone grinding wheal”. Teeth were then randomly divided
into six groups:
Groups I and IV: Scotchbond Multipurpose Plus (SbMP)
and All bond 2 dental adhesives were used for groups I and IV
respectively to adhere composite to the flat tooth surface with no
retentive mean as the control group.
Groups II and V: A circumferential slot was prepared and
composite attached to the tooth using SbMP and All bond 2 for
groups II and V respectively.
Groups III and VI: Four self threading pins were placed
and composite adhered using SbMP and All bond 2 for groups III
and VI respectively.
After storage and thermal cycling, the SBS for each group
was measured using “universal testing machine”.
The results varied according to the retentive mean and dental
adhesive used. Groups with four pins produced the highest SBS
and groups with no retentive mean showed the lowest SBS. Also
the groups using All bond 2 adhesive generally had higher values
when compared with the same groups using SbMP dental adhesive.
Within the limits of this study, it is indicated that when the
highest SBS is to be achieved, then All bond 2 dental adhesive
with pins should be used.
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