Influence of preparation depths on the fracture load of customized zirconia abutments with titanium insert
The Journal of Advanced Prosthodontics
;
: 183-190, 2015.
Article
in English
| WPRIM
| ID: wpr-194331
ABSTRACT
PURPOSE:
This study evaluated the fracture load of customized zirconia abutments with titanium insert according to preparation depths, with or without 5-year artificial aging. MATERIALS ANDMETHODS:
Thirty-six identical lithium disilicate crowns (IPS e.max press) were fabricated to replace a maxillary right central incisor and cemented to the customized zirconia abutment with titanium insert on a 4.5x10 mm titanium fixture. Abutments were fabricated with 3 preparation depths (0.5 mm, 0.7 mm, and 0.9 mm). Half of the samples were then processed using thermocycling (temperature 5-55degrees C, dwelling time 120s) and chewing simulation (1,200,000 cycles, 49 N load). All specimens were classified into 6 groups depending on the preparation depth and artificial aging (non-artificial aging groups N5, N7, N9; artificial aging groups A5, A7, A9). Static load was applied at 135 degrees to the implant axis in a universal testing machine. Statistical analyses of the results were performed using 1-way ANOVA, 2-way ANOVA, independent t-test and multiple linear regression.RESULTS:
The fracture loads were 539.28 +/- 63.11 N (N5), 406.56 +/- 28.94 N (N7), 366.66 +/- 30.19 N (N9), 392.61 +/- 50.57 N (A5), 317.94 +/- 30.05 N (A7), and 292.74 +/- 37.15 N (A9). The fracture load of group N5 was significantly higher than those of group N7 and N9 (P<.017). Consequently, the fracture load of group A5 was also significantly higher than those of group A7 and A9 (P<.05). After artificial aging, the fracture load was significantly decreased in all groups with various preparation depths (P<.05).CONCLUSION:
The fracture load of a single anterior implant restored with lithium disilicate crown on zirconia abutment with titanium insert differed depending on the preparation depths. After 5-year artificial aging, the fracture loads of all preparation groups decreased significantly.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Axis, Cervical Vertebra
/
Titanium
/
Aging
/
Dental Implants
/
Linear Models
/
Crowns
/
Incisor
/
Lithium
/
Mastication
Language:
English
Journal:
The Journal of Advanced Prosthodontics
Year:
2015
Type:
Article
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