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An In Vitro Study on the Effects of Post-Core Design and Ferrule on the Fracture Resistance of Endodontically Treated Maxillary Central Incisors.

Sreedevi S, Sanjeev R, Raghavan R, Abraham A, Rajamani T, Govind GK - J Int Oral Health (2015)

Bottom Line: The fracture load results were then statistically analyzed.Reinforcement of endodontically treated maxillary central incisors with post and core, improved their fracture resistance to be at par with that of endodontically treated maxillary central incisor, with natural crown. 2.The fracture resistance of endodontically treated maxillary central incisors is significantly increased when restored with custom cast post-core and 2 mm ferrule.

View Article: PubMed Central - PubMed

Affiliation: Professor, Department of Prosthodontics, Century International Institute of Dental Sciences and Research Centre, Poinachi, Thekkil, Kasaragode, Kerala, India.

ABSTRACT

Background: Endodontically treated teeth have significantly different physical and mechanical properties compared to vital teeth and are more prone to fracture. The study aims to compare the fracture resistance of endodontically treated teeth with and without post reinforcement, custom cast post-core and prefabricated post with glass ionomer core and to evaluate the ferrule effect on endodontically treated teeth restored with custom cast post-core.

Materials and methods: A total of 40 human maxillary central incisors with similar dimensions devoid of any root caries, restorations, previous endodontic treatment or cracks were selected from a collection of stored extracted teeth. An initial silicone index of each tooth was made. They were treated endodontically and divided into four groups of ten specimens each. Their apical seal was maintained with 4 mm of gutta-percha. Root canal preparation was done and then post core fabrication was done. The prepared specimens were subjected to load testing using a computer coordinated UTM. The fracture load results were then statistically analyzed. One-way ANOVA was followed by paired t-test.

Results: 1. Reinforcement of endodontically treated maxillary central incisors with post and core, improved their fracture resistance to be at par with that of endodontically treated maxillary central incisor, with natural crown. 2. The fracture resistance of endodontically treated maxillary central incisors is significantly increased when restored with custom cast post-core and 2 mm ferrule.

Conclusion: With 2 mm ferrule, teeth restored with custom cast post-core had a significantly higher fracture resistance than teeth restored with custom cast post-core or prefabricated post and glass ionomer core without ferrule.

No MeSH data available.


Related in: MedlinePlus

Specimens loaded in the universal testing machine for testing fracture strength.
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Figure 2: Specimens loaded in the universal testing machine for testing fracture strength.

Mentions: The prepared specimens were subjected to load testing using a computer coordinated UTM (Schimadzu Inc.) (Figure 2). The test specimens were placed in the lower jaw of the load testing machine and a vertical rod mounted on the upper jaw of the UTM was aligned to apply load on the palatal aspects of the specimen teeth 2 mm apical to the incisal edge of the metal crown\coping.


An In Vitro Study on the Effects of Post-Core Design and Ferrule on the Fracture Resistance of Endodontically Treated Maxillary Central Incisors.

Sreedevi S, Sanjeev R, Raghavan R, Abraham A, Rajamani T, Govind GK - J Int Oral Health (2015)

Specimens loaded in the universal testing machine for testing fracture strength.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4588787&req=5

Figure 2: Specimens loaded in the universal testing machine for testing fracture strength.
Mentions: The prepared specimens were subjected to load testing using a computer coordinated UTM (Schimadzu Inc.) (Figure 2). The test specimens were placed in the lower jaw of the load testing machine and a vertical rod mounted on the upper jaw of the UTM was aligned to apply load on the palatal aspects of the specimen teeth 2 mm apical to the incisal edge of the metal crown\coping.

Bottom Line: The fracture load results were then statistically analyzed.Reinforcement of endodontically treated maxillary central incisors with post and core, improved their fracture resistance to be at par with that of endodontically treated maxillary central incisor, with natural crown. 2.The fracture resistance of endodontically treated maxillary central incisors is significantly increased when restored with custom cast post-core and 2 mm ferrule.

View Article: PubMed Central - PubMed

Affiliation: Professor, Department of Prosthodontics, Century International Institute of Dental Sciences and Research Centre, Poinachi, Thekkil, Kasaragode, Kerala, India.

ABSTRACT

Background: Endodontically treated teeth have significantly different physical and mechanical properties compared to vital teeth and are more prone to fracture. The study aims to compare the fracture resistance of endodontically treated teeth with and without post reinforcement, custom cast post-core and prefabricated post with glass ionomer core and to evaluate the ferrule effect on endodontically treated teeth restored with custom cast post-core.

Materials and methods: A total of 40 human maxillary central incisors with similar dimensions devoid of any root caries, restorations, previous endodontic treatment or cracks were selected from a collection of stored extracted teeth. An initial silicone index of each tooth was made. They were treated endodontically and divided into four groups of ten specimens each. Their apical seal was maintained with 4 mm of gutta-percha. Root canal preparation was done and then post core fabrication was done. The prepared specimens were subjected to load testing using a computer coordinated UTM. The fracture load results were then statistically analyzed. One-way ANOVA was followed by paired t-test.

Results: 1. Reinforcement of endodontically treated maxillary central incisors with post and core, improved their fracture resistance to be at par with that of endodontically treated maxillary central incisor, with natural crown. 2. The fracture resistance of endodontically treated maxillary central incisors is significantly increased when restored with custom cast post-core and 2 mm ferrule.

Conclusion: With 2 mm ferrule, teeth restored with custom cast post-core had a significantly higher fracture resistance than teeth restored with custom cast post-core or prefabricated post and glass ionomer core without ferrule.

No MeSH data available.


Related in: MedlinePlus