Publication: Fracture fesistance of endodontically treated teeth: Three walls versus four walls of remaining coronal tooth structure
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Issued Date
2009
Resource Type
File Type
application/pdf
ISSN
1059941X
Other identifier(s)
2-s2.0-58149129849
Rights Holder(s)
มหาวิทยาลัยศรีนครินทรวิโรฒ
Bibliographic Citation
Journal of Prosthodontics. Vol 18, No.1 (2009), p.49-53
Suggested Citation
Arunpraditkul S., Saengsanon S., Pakviwat W. Fracture fesistance of endodontically treated teeth: Three walls versus four walls of remaining coronal tooth structure. Journal of Prosthodontics. Vol 18, No.1 (2009), p.49-53. doi:10.1111/j.1532-849X.2008.00375.x Retrieved from: https://hdl.handle.net/20.500.14740/7702
Author(s)
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 Scheffé tests (p < 0.05). Results: Group 1 had the highest fracture resistance (1190.3 ± 110.5 kg), significantly different from the other groups (p < 0.05) (group 2: 578.5 ± 197.4 kg; group 3: 786.6 ± 132.8 kg; group 4: 785.4 ± 289.9 kg). There were no significant differences among the test groups. The mode of failure in group 1 was a horizontal root fracture, whereas that of the other groups was either vertical or oblique fracture. Conclusions: Teeth with four walls of remaining coronal dentine had significantly higher fracture resistance than teeth with only three walls. The site of the missing coronal wall did not affect the fracture resistance of endodontically treated teeth. © 2008 by The American College of Prosthodontists.
Subject(s)
Chromium derivative
Zinc phosphate
Article
Cementation
Dental care
Dental surgery
Denture
Human
Mandible
Pathophysiology
Premolar tooth
Tooth crown
Tooth fracture
Tooth pulp disease
Bicuspid
Cementation
Chromium Alloys
Dental Casting Technique
Dental Restoration Failure
Dental Stress Analysis
Humans
Mandible
Post and Core Technique
Tooth Crown
Tooth Fractures
Tooth Preparation, Prosthodontic
Tooth, Nonvital
Zinc Phosphate Cement
Zinc phosphate
Article
Cementation
Dental care
Dental surgery
Denture
Human
Mandible
Pathophysiology
Premolar tooth
Tooth crown
Tooth fracture
Tooth pulp disease
Bicuspid
Cementation
Chromium Alloys
Dental Casting Technique
Dental Restoration Failure
Dental Stress Analysis
Humans
Mandible
Post and Core Technique
Tooth Crown
Tooth Fractures
Tooth Preparation, Prosthodontic
Tooth, Nonvital
Zinc Phosphate Cement