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نوع الوثيقة |
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مقال في مجلة دورية |
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عنوان الوثيقة |
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ASSESSMENT OF PULP RESPONSE TO DIFFERENT REMAINING DENTIN THICKNESSES (RDT) AND A DENTIN BONDING AGENT. AN IN-VIVO STUDY ASSESSMENT OF PULP RESPONSE TO DIFFERENT REMAINING DENTIN THICKNESSES (RDT) AND A DENTIN BONDING AGENT. AN IN-VIVO STUDY |
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لغة الوثيقة |
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الانجليزية |
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المستخلص |
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The aim of the present in-vivo study was to assess the pulpal response to different remaining
dentin thicknesses in terms of soft tissue changes and hard tissue deposition beneath class V cavities
lined with a dentin bonding agent. Material and methods: a sum of thirty-two premolar from four
adult healthy dogs was used for the study. The experimental procedures in dogs were made following
the European Communities Directive (86/609/EEC). Class V cavities in the center of the
buccal surface of each selected tooth were prepared at two different pre-specified and adjusted
depthE(CWD) as an estimate of RDT and grouped as depth I (16 teeth) and depth II (16 teeth). The
adhesive dentin bonding used was Clearfil SE bond (Kuraray). Calcium hydroxide (Dycal) was used
as a control lining material. Accordingly, experimented teeth were' further subdivided into four
groups of eight teeth each, namely groups A and B (depth I), to be lined with Dycal and Clearfil SE
respectively. Groups C and D (depth II), to be lined also with Dycal and Clearfil SE respectively.
Dogs were sacrificed after one month observation period and teeth specimens 'prepared. Results of
histomorphometric analyses showed that, remaining dentin thickness (RDT) ranged from 1-0.75mm
in teeth sections of groups A, B (depth I) and< 0.5 - 0.25mm in groups C and D (depth II). For
Clearfil SE bond- depth 1- a significantly less pulpal inflammation than depth II was observed either
immediately under the prepared cavity or at the pulpal center (P-value: 0.003 and <0.001) respectively.
For both depths, Clearfil SE bond groups (B and C) showed significantly more inflammatory
features than Dycal (control). As for hard tissue formation, reactionary dentin formation
was detected under 14 out of 16 cavities of depth I, irrespective of the lining material. As for depth
II, Dycallined cavities showed a thin layer of tertiary dentin. This feature was nearly absent under
the majority of depth II cavities lined with Clearfil SE bond group (D). On the other hand, no reparative
dentin was found in all studied teeth sections. Conclusions: According to the present evidence,
it can concluded that, RDT is an important and effective factor in reducing or preventing pulpal adverse
reaction to insults caused by cavity preparation and restoration events. So unnecessary increase
in cavity depths should be avoided. |
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ردمد |
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0070-9484 |
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اسم الدورية |
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Egyptian Dental Journal |
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المجلد |
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52 |
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العدد |
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1 |
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سنة النشر |
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1426 هـ
2006 م |
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نوع المقالة |
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مقالة علمية |
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تاريخ الاضافة على الموقع |
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Sunday, April 15, 2012 |
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الباحثون
| مديحه جمعه | Gomaa, Madiha | باحث مشارك | | |
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