Einfluss des Zahnalters auf den Haftverbund intrakanalär befestigter Wurzelstifte unter Verwendung der Befestigungskomposite SpeedCEM Plus und Multilink Automix
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Philipps-Universität Marburg
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Abstract
The restoration of endodontically treated teeth with large coronal loss generally requires
the insertion of an intraradicular post to provide adequate retention for the final restoration.
While the properties of the post material and the luting cement have been determined
by the manufacturer and their bond has already been adequately investigated,
the bond between the luting cement and the root canal wall is dependent on the properties
of the root dentine. However, these are by no means to be regarded as constant,
since a change in the structure and physical properties occurs in the course of physiological
aging.
The present study investigated the influence of tooth age on the adhesion of two different
luting systems for the adhesive luting of root canal posts. For this purpose, adhesion
values were measured on specimens of different ages using the pull-out-method.
From a number of endodontically untreated, extracted human teeth with straight root
canals and a preferably round anatomy of canal cross-sections, 60 suitable test teeth
were selected. A radiographic examination of the root canal anatomy was performed.
The test teeth were divided into three age groups (young: 20 - 35 years, middle-aged:
45 - 60 years, old: 70 - 85 years). Ten teeth of each age group were then randomly
assigned to one of the two luting systems (SpeedCEM Plus, Multilink Automix), resulting
in six test groups. In order to prevent dehydration, the test teeth were continuously stored
moist in sodium acylide solution.
In order to achieve the same bonding surface in each case, the teeth were decoronated
and the root canals were mechanically prepared up to size ISO 60 with a root canal
length of 8 mm. The preparation steps were accompanied by intermediate rinses with
distilled water. Subsequently, the cementation of conditioned steel spreaders ISO 60
prepared for the purpose of the study was carried out using SpeedCEM Plus (Ivoclar
Vivadent) and Multilink Automix (Ivoclar Vivadent). After a 14-day curing period, the bond strength analysis was performed using the pullout-
method in a universal testing machine. In addition, the fracture mode was determined
by photos.
The median bond strength values in the three age groups for the investigated luting composites
ranged from 6.48 to 7.95 MPa for SpeedCEM Plus and from 7.64 to 8.71 MPa
for Multilink Automix. When the three age groups were compared using ANOVA, no significant
differences were found (SpeedCEM Plus p = 0.225 and Multilink Automix p =
0.938).
In a pairwise comparison of all combination possibilities of the age groups, no significant
differences with regard to tooth age could be found. For SpeedCEM Plus, the significance
values for young vs. middle-aged were p = 0.997, for young vs. old p = 0.972 and
for middle-aged vs. old p = 0.877. For Multilink Automix, the significance values for young
vs. middle-aged were p = 0.240, for young vs. old p = 0.386 and for middle-aged vs. old
p = 0.826.
The median of the bond strength values of both luting composites were compared pairwise
using t-test for all three age groups. No significant differences were found between
the two luting composites in any age group. Significance values for the young age group
were p = 0.284, for the medium age group p = 0.876 and for the old age group p = 0.806.
Regarding the fracture modes, mixed fracture occurred in 41 cases, adhesive failure to
dentin in eight cases, cohesive failure in cement in seven cases, and adhesive failure to
the spreader in only four cases. With a total share of 68%, mixed fracture was the dominant
fracture mode. A significant correlation between fracture mode and bond strength
could not be found with p = 0.423.
Based on the analyses, no age-dependent differences in terms of bond strength could
be determined for the two luting composites Multilink Automix and SpeedCEM Plus.
Thus, both composites are equally suitable for the adhesive cementation of root posts
for all three age groups (young, middle-aged, old). There were also no significant differences
in the adhesive bond between the two composites. Thus, both are equally well
suited for adhesive cementation.
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Dates
Created: 2022Issued: 2022-07-04Updated: 2022-07-04
Faculty
Medizin
Publisher
Philipps-Universität Marburg
Language
ger
Data types
DoctoralThesis
DDC-Numbers
610
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Schumacher, Tamara Tina: Einfluss des Zahnalters auf den Haftverbund intrakanalär befestigter Wurzelstifte unter Verwendung der Befestigungskomposite SpeedCEM Plus und Multilink Automix. : Philipps-Universität Marburg 2022-07-04. DOI: https://doi.org/10.17192/z2022.0277.
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