A comparative evaluation of fracture resistance of endodontically treated teeth restored with different post core systems - an in-vitro study

Department of Conservative Dentistry, VSPM's Dental College and Research Centre Nagpur, Maharashtra, India.
The journal of advanced prosthodontics (Impact Factor: 0.63). 06/2011; 3(2):90-5. DOI: 10.4047/jap.2011.3.2.90
Source: PubMed

ABSTRACT To compare the fracture resistance and the mode of failure of endodontically treated teeth restored with different post-core systems.
Root canal treatment was performed on 40 maxillary incisors and the samples were divided into four groups of 10 each. For three experimental groups post space preparation was done and teeth were restored with cast post-core (Group B), stainless steel post with composite core (Group C) and glass fiber post with composite core using adhesive resin cement (Group D). Control group (A) samples were selected with intact coronal structure. All the samples were prepared for ideal abutment preparation. All the samples were subjected to a load of 0.5 mm/min at 130° until fracture occurred using the universal testing machine. The fracture resistance was measured and the data were analyzed statistically. The fracture above the embedded resin was considered to be favorable and the fracture below the level was considered as unfavorable. The statistical analysis of fracture resistance between different groups was carried out with t-test. For the mode of failure the statistical analysis was carried out by Kruskal-Wallis test and Chi-Square test.
For experimental group Vs control group the fracture resistance values showed significant differences (P<.05). For the mode of failure the chi-square value is 16.1610, which means highly significant (P=.0009) statistically.
Endodontically treated teeth without post core system showed the least fracture resistance demonstrating the need to reinforce the tooth. Stainless steel post with composite core showed the highest fracture resistance among all the experimental groups. Teeth restored with the Glass fiber post showed the most favorable fractures making them more amenable to the re-treatment.


Available from: Pravinkumar Patil, May 30, 2015
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: The objective of the present study was to determine the effect periodontal disease on the bond strength of fiberglass posts, different adhesive systems and resin cements. Ninety human maxillary central incisors roots extracted due to periodontal disease or prosthetic reasons were endodontically treated and divided into six experimental groups: NPD-ARC – no periodontal disease/RelyX ARC and Adper Single Bond 2; NPD-PF – no periodontal disease/Panavia F and ED Primer; NPD-U – no periodontal disease/RelyX U100; PD-ARC – periodontal disease/RelyX ARC and Adper Single Bond 2; PD-PF – periodontal disease/Panavia F and ED Primer; and PD-U – periodontal disease/RelyX U100. Specimens were subjected to push-out test and data were analyzed by two-way ANOVA and Tukey’s test (p = 0.05). The periodontal disease groups showed that the Panavia F/ED Primer group presented no significantly higher mean values compared with RelyX U100, and that both presented significantly higher mean values when compared with RelyX ARC/Single Bond 2 group. These results were also observed in roots with no periodontal disease. There were no differences in bond strength mean values of roots related or not to periodontal disease.
    03/2014; 2(1):11. DOI:10.1186/2196-4351-2-11
  • [Show abstract] [Hide abstract]
    ABSTRACT: Objective: Limited data are available on the resistance to fracture of premolars restored with newly direct techniques. The aim of this study was to assess in vitro the fracture resistance of endodontically treated premolars with cusp coverage restored with different resin restorations. Method: Fifty human superior premolars were divided into 5 groups (n = 10), prepared as follows: Sound teeth used in G1 as control; in the other experimental groups (G2, G3, G4 and G5), MOD cavities were prepared, extending toward the palatal cups and root canal treatments were performed. Groups were restored varying the restorative technique: G2 – only with composite resin (CR), G3– fiber post + CR, G4- polyethylene fiber (Ribbond) + CR and G5- Fiber post + Ribbond + CR. The teeth were thermocycled 1000 times between 5°C and 55°C. After 24 h, the specimens were loaded in a universal testing machine until fracture (N) and failure mode was checked. One-way ANOVA and Tukey-Krammer tests were used for the statistical analysis (α = 0.05). Result: Fracture strength of control (G1- 0.41 ± 0.11) was not significantly different (P >0.05) from Ribbond + CR (G4- 0.30 ± 0.08) and Fiber post + Ribbond + CR (G5- 0.38 ± 0.11). Specimens restored only with CR (G2- 0.18 ± 0.05) and fiber post + CR (G3- 0.26 ± 0.09) were statistically similar (P >0.05) between themselves, but both had mean values different from control (P <0.05). Longitudinal and oblique crown fractures were found in all groups. Conclusion: Ribbond-fiber reinforced resin restorations increased the fracture resistance of premolars with extensive cavities when compared to conventional direct restorative techniques.
    IADR General Session 2012; 06/2012
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: When fabricating indirect post and core, internal coronal walls are tapered to remove undercuts and allow a better adaptation. To evaluate the fracture strength of anterior tooth reconstructed with post and core and crowned, with two different taper of internal coronal walls, 6° and 30° to the long axis, two groups of 30 clear plastic analogues simulating endodontically treated maxillary central incisors were prepared. The analogues crowned were subjected to a compressive load with a 1-kN cell at a crosshead speed of 0.05 mm/min at 130° to the long axis until fracture occurred. Data were analyzed by Lillifors and Mann-Whitney tests. Mean failure loads for the groups were as follows: group I 1038.69 N (standard deviation ±243.52 N) and group II 1231.86 N (standard deviation ±368.76 N). Statistical tests showed significant difference between groups (p = 0.0010 < 0.01). Increasing the taper of internal coronal walls appears to enhance the fracture resistance of anterior maxillary teeth post and core reconstructed.
    02/2014; 5:1758736014547550. DOI:10.1177/1758736014547550