Document Details
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Document Type |
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Article In Journal |
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Document Title |
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FRACTURE RESISTANCE OF ENDODONTICALLY TREATED FRACTURE RESISTANCE OF ENDODONTICALLY TREATED |
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Document Language |
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English |
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Abstract |
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In face the invasive trend toward an overuse andd misuse of post and cores,
another strong conservative trend is nowadays appearing helped by the recent
revolutionary impr6vement in adhesive dentistry for restoration of endodontically
treated teeth with more than 60% of remaining sound tooth structure.
Aim of study: 1- To reveal if the type of anterior tooth destruction can affect the
resistance of such teeth to fracture. 2-To investigate the effect of veneering with
different types of dental adhesive composite systems on the fracture resistance.
Materials and methods: Eighty freshly extracted intact human maxillary central
incisors were prepared for root canal treatiment to an apical preparation of size#50
file.Canals were obturated with cold lateral compaction. Teeth were then classified
into four main groups of 20 teeth each In the first group (Access) no other coronal
destruction other than the access cavity was made (control group). In the second
group, in addition to the access cavity, a standard class III cavity was made (C3).
In the third group (C4), class IV cavity was prepared, and in the fourth group (F)
diagonal incisal reduction simulating fractured incisal angle was done. Each group
was subdivided into two subgroups of 10 teet each for the two types of composite
restorative systems Adhe SE / TEconom (A) and Prompt L-Pop/ Filtek Supreme
(P). Composite restorations were done for both the access cavities and the type of
destruction respective to each group. In each subgroup, 5 teeth (n=5) were restored
with the corresponding composite restoration with no lamination (NL) and in the
other 5 teeth (n=5) a direct laminate veneer was done. All teeth specimens were
then loaded to failure using compressive force at a cross-head speed of
0.5mrn1minute.
Results: Teeth specimens with different type's destruction restored with Prompt LPop/
Filtek Supreme with or without lamination showed generally a statistically
significant higher fracture resistance as compared to those restored with Adhe SE /
TEconom"P-value 0.0003". Lamination caused an increase in fracture resistance in
almost all studied teeth groups. Irrespective of the composite resin type used, a
general trend was recognized toward higher fracture strength in teeth with
fractured unilateral incisal angle followed by teeth with access cavities only
(control), then teeth with class IV cavities and the least fracture strength was
detected in teeth with class ill cavities (a mean of 489.5,475.5,399.5, and 366
respectively).
Conclusion: Lamination caused an increase in fracture resistance in almost all
studied teeth groups. Type of coronal destruction had a statistically significant
effect on the resistance to fracture. Most of the fractures were ofthe favorable type.
Teeth restored with Prompt L-Pop lFiltek Supreme showed statistically significant
higher fracnire strength than those restored with Adhe SEI TEconom. |
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ISSN |
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0 |
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Journal Name |
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Egyptian dental journal |
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Volume |
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53 |
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Issue Number |
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4 |
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Publishing Year |
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2007 AH
2007 AD |
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Article Type |
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Article |
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Added Date |
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Friday, January 4, 2008 |
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Researchers
| مديحة جمعة | Gomaa, Madiha | Investigator | Doctorate | |
| سلمى باهمام | Bahammam, Salma | Researcher | Doctorate | |
| علا فهمي | Fahmi, Ola | Researcher | Doctorate | |
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