e-journal

Fracture Resistance of Endodontically Treated Teeth: Three Walls versus Four Walls of Remaining Coronal Tooth Structure

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Abstract
Purpose: The purpose of this study was to evaluate the fracture resistance of endodontically
treated teeth between those with four walls and those with three walls of remaining coronal tooth structure and the effect of the site of the missing coronal wall.
Materials and Methods: Thirty-two endodontically treated second mandibular premolars were decoronated, leaving 3 mm above the cementoenamel junction (CEJ). A 0.5-mm-wide chamfer was prepared 1 mm above the CEJ. The teeth were randomly divided into four groups. Group 1 had four walls of coronal tooth structure, whereas groups 2, 3, and 4 had only three walls, missing the buccal, lingual, and mesial wall, respectively. The cast dowel and cores and crowns (Ni–Cr alloy) were cemented with zinc phosphate cement. A compressive load was applied 45◦ to the long axis, 2 mm
below the buccal cusp, with an Instron machine until failure at a crosshead speed of 5 mm/min. Failure load (kg) and mode of failure were recorded. Data were analyzed with one-way ANOVA and Scheff´e tests (p < 0.05).
Results: Group 1 had the highest fracture resistance (1190.3 ± 110.5 kg), significantly different from the other groups (p

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Ketersediaan

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Informasi Detail

Judul Seri

Prosthodontics

No. Panggil

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Penerbit

: Journal of Prosthodontics The American College of Prosthodontists., 2009

Deskripsi Fisik

Journal of Prosthodontics 18 (2009) 49–53

Bahasa

English

ISBN/ISSN

doi: 10.1111/j.1532-

Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

18 (2009) 49–53

Subjek

Prosthodontics

Info Detail Spesifik

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Pernyataan Tanggungjawab

deliza

Versi lain/terkait

Lampiran Berkas

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