Salentijn, M.E. (2010) Het versterken van avitale onvolgroeide frontelementen. thesis, Dentistry.
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Abstract
Background: A problem dental clinicians have to deal with is a high frequency of fractures of immature pulpless teeth which have had an endodontic treatment. Those teeth are severely weakened and reinforcement is recommended. Aim: The aim of this study was to evaluate if fiber posts have a positive influence on the fracture resistance of an immature pulpless tooth compared with gutta-percha, which is widely used for endodontic treatment. Methodology: 68 extracted bovine teeth are used to simulate an immature pulpless tooth model; the apex was cut to a length of 12mm. from the cement-enamel junction and the crown to a length of 8mm. from the cement-enamel junction. The diameter of the root canal was standardized to 2.3mm. During root canal preparation the teeth were irrigated with sodium hypochlorite 2°/o and for removing the smear layer EDTA 17o/o was used. As final rinse the root canals were irrigated with a saline solution of 0.9o/o. During the study the teeth were stored in distilled water. The prepared teeth were at random divided into four groups (n = 17): group I = control (without root canal filling), group II = apical plug of MTA and root canal filling with gutta-percha sealed with AH 26, group Ill =apical plug of MTA and root canal filling with gutta-percha sealed with AH 26 and everStickPost post, IV = apical plug of MTA and root canal filling with gutta-percha sealed with AH 26 and Para Post Fiber White post. The posts were cemented with resin cement (Panavia 2.0). The endodontic access cavities of the teeth were restored with light-cured composite Photo Posterior. The periodontal ligament was simulated with a polyether impression material (lmpregum). The fracture resist~nce was determined with a Universal Testing Machine. A compressive load was applied at 130° on the long axis of the tooth with a speed of 1 mm. min. -1 until fracture. The data were analyzed with SPSS 16.0. The applied tests were Kolmogorov-Smirnov test, Analysis of Variance (one-way ANOVA) and the Tukey test. A significance level of 0.05 was used for all comparisons. Results: Group II showed the highest fracture resistance (1882.22N) followed by Group Ill (1567.43N), Group IV (1426.12N) and Group I (1047.44N) with the lowest fracture resistance. Group II and Ill had a significant higher fracture resistance when compared with group I (respectively p<0.001 and p=0.015). Between the different root canal materials of group II, Ill and IV, no statistically difference was found. Conclusion: The results of this study indicate that the root canal materials guttapercha and everStickPost post have the possibility to reinforce the immature endodontically treated tooth.
| Item Type: | Thesis (Thesis) |
|---|---|
| Supervisor name: | Begeleider; and Vogels, drs. M.P.J.M. and Endodontologie |
| Faculty: | Medical Sciences |
| Date Deposited: | 25 Jun 2020 10:39 |
| Last Modified: | 25 Jun 2020 10:39 |
| URI: | https://umcg.studenttheses.ub.rug.nl/id/eprint/96 |
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