Sains Malaysiana 44(8)(2015): 1189-1194

 

The Combined Effect of Dental Post and Cement Materials on Fracture Resistance and Fracture Mode of Endodontically-treated Teeth

(Gabungan Kesan Pasca Pergigian dan Bahan Simen ke atas Rintangan Keretakan dan Mod

Keretakan Gigi yang Dirawat secara Endodontik)

 

 

MOHAMED ABDULMUNEM1*, ALI DABBAGH2, HADIJAH BINTI ABDULLAH1 & NOOR HAYATY BINTI ABU KASIM1

 

1Department of Restorative Dentistry, University of Malaya, 50603 Kuala Lumpur, Malaysia

 

2Biomaterials Technology Research Group, Faculty of Dentistry, University of Malaya

50603 Kuala Lumpur, Malaysia

 

Received: 16 October 2014/Accepted: 13 April 2015

 

ABSTRACT

The aim of this study was to investigate the simultaneous influence of various dental posts and cementation materials on the fracture resistance and failure mode of the endodontically-treated teeth. Sixty endodontically treated upper central incisors were randomly divided into two main groups, each consisted of three subgroups restored with titanium, fiber and stainless steel posts. The posts in the first and second groups were luted with zinc phosphate and composite resin cements, respectively. Composite cores were built-up over the specimens and then retained with nickel-chromium crowns. Specimens were thermocycled and then loaded at 135o until failures were observed. The obtained data of fracture resistances and failure modes were analyzed using Two-way ANOVA and the Chi-Square tests, respectively. The results showed that the zinc phosphate cement resulted in relatively higher fracture resistances. However, luting of dental posts with composite resin provided more restorable failures in endodontically-treated teeth. Moreover, the teeth restored by fiber posts exhibited desirable fracture resistances with more restorable failure modes, compared with those restored by titanium or stainless steel posts.

 

Keywords: Dental cements; dental posts; fracture resistance

 

ABSTRAK

Kajian ini bertujuan untuk mengkaji pengaruh serentak pelbagai tiang pergigian dan bahan simen pada rintangan keretakan dan mod kegagalan ke atas gigi dirawat secara endodontik. Enam puluh batang gigi rawatan endodontik gigi kacip atas berpusat dibahagikan secara rawak kepada dua kumpulan utama, masing-masing terdiri daripada tiga subkumpulan yang dipulihkan dengan titanium, serat dan tiang keluli tahan karat. Tiang dalam kumpulan pertama dan kedua telah diikat masing-masing dengan zink fosfat dan simen resin komposit. Teras komposit dibuat ke atas spesimen tersebut dan kemudian dikukuhkan dengan gelang nikel-kromium. Spesimen dikitarhaba dan kemudian dinaikkan pada 135o sehingga kegagalan diperhatikan. Data yang diperoleh untuk rintangan retak dan mod kegagalan dianalisis menggunakan ANOVA dua hala dan ujian khi kuasa dua. Hasil kajian menunjukkan bahawa simen fosfat zink mengakibatkan rintangan retak yang agak tinggi. Walau bagaimanapun, ikatan tiang gigi dengan resin komposit memberikan lebih kegagalan yang boleh dipulihkan dalam gigi dirawat secara endodontik. Selain itu, gigi yang dipulihkan melalui tiang gentian menunjukkan rintangan retak yang diinginkan dengan lebih banyak mod kegagalan yang boleh dipulihkan, berbanding dengan kumpulan yang dipulihkan melalui titanium atau tiang keluli tahan karat.

 

Kata kunci: Rintangan retak; simen pergigian; tiang pergigian

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*Corresponding author; email: Mohamadjasem2011@hotmail.com

 

 

 

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