Session
Dental Sciences
Description
Statement of problem. Meny studies concerning the ferrule effect may have a significant effect on fracture resistance of endodontically treated teeth.
Purpose. This study investigated the fracture resistance of endodontically treated anterior central incisors prepared with internal ferrule preparation design.
Material and methods. A total of 120 extracted human maxillary central incisor were endodontically treated and divided into 10 groups of 12. Group A1 to E1 and A2 to E2 represented teeth prepared with a 0mm, 0.5mm, 1mm, 1.5mm, and 2mm internal ferrule preparation. As material for our experiments, we used Ø 1.4 - 1.6mm Y-TZP ceramics posts with retention forms in the coronary part of the post, upgraded with core build-up material (IPS E-MAX, Ivoclar, Vivadent).
The experimental samples were cemented (Multilink Automix, Ivoclar), embedded in acrylic resin bloks (ProBase Polymer/Monomer, Ivoclar) and loaded at an angle of 45° degrees in an Instron Testing Machine 4301 (Instron Corp., USA) at a crosshead speed of 1mm/min until fracture. Fracture loads (N) and modes (repairable or catastrophic) were recorded. Two-way analysis of variance was used for statistical analysis with the level of significance seat p
Results. The mean values (±SD) for fracture loads measured in Newtons were for the group A1: 1.4mm - 405,04N (±100.04); and A2: 1.6 mm - 503,09N (±109.01); for Group B1: 1.4mm - 401.07N (±75.02) and B2: 1.6mm - 507.13N (±101.08), for Group C1: 1.4mm - 479.01N (±109.12) and C2: 1.6mm - 567.06N (±134.37), for group D1: 1.4mm - 601.73N (±103.52) and D2: 1.6mm - 675.79N (±171.09), for Group E1: 1.4mm - 719.99N (±220.02) and E2: 1.6mm - 861.06N (±237.15).
Failure patterns within those 1.4 – 1.6mm Y-TZP posts - E-MAX cores groups revealed noncatastrophic failure in group A = 100% - 100% for 0 mm, group B = 100% - 100% for 0.5mm; group C – 91.7% - 91.7% for 1mm, group D = 91.7% - 75% for 1.5mm; and 66.7% - 58.3% for 2mm both of groups E.
Conclusion. With the limitations of this study, the teeth prepared without, 0.5mm and 1mm internal ferrule preparation restored with 1.4 - 1.6mm zirconia posts with retentive coronal part demonstrated significantly lower failure loads then those with 1.5 and 2mm IF. The results showed that zirconia posts with retentive coronal part and 1.5mm - 2mm internal ferrule preparation which contribute to increasing the fracture resistance of the restored root-coronary dental complex, show significance higher fracture resistance. Significant higher % of reparable fractures was determined in all of experimental groups.
Proceedings Editor
Edmond Hajrizi
ISBN
978-9951-550-47-5
Location
UBT Kampus, Lipjan
Start Date
30-10-2021 11:45 AM
End Date
30-10-2021 12:00 PM
DOI
10.33107/ubt-ic.2021.394
Recommended Citation
Jovanovski, S. and Marion, Lj., "THE EFFECT OF NEW INTERNAL FERRULE DESIGN PREPARATION ON THE FRACTURE RESISTANCE OF ENDODONTICALLY TREATED CENTRAL INCISORS" (2021). UBT International Conference. 412.
https://knowledgecenter.ubt-uni.net/conference/2021UBTIC/all-events/412
Included in
THE EFFECT OF NEW INTERNAL FERRULE DESIGN PREPARATION ON THE FRACTURE RESISTANCE OF ENDODONTICALLY TREATED CENTRAL INCISORS
UBT Kampus, Lipjan
Statement of problem. Meny studies concerning the ferrule effect may have a significant effect on fracture resistance of endodontically treated teeth.
Purpose. This study investigated the fracture resistance of endodontically treated anterior central incisors prepared with internal ferrule preparation design.
Material and methods. A total of 120 extracted human maxillary central incisor were endodontically treated and divided into 10 groups of 12. Group A1 to E1 and A2 to E2 represented teeth prepared with a 0mm, 0.5mm, 1mm, 1.5mm, and 2mm internal ferrule preparation. As material for our experiments, we used Ø 1.4 - 1.6mm Y-TZP ceramics posts with retention forms in the coronary part of the post, upgraded with core build-up material (IPS E-MAX, Ivoclar, Vivadent).
The experimental samples were cemented (Multilink Automix, Ivoclar), embedded in acrylic resin bloks (ProBase Polymer/Monomer, Ivoclar) and loaded at an angle of 45° degrees in an Instron Testing Machine 4301 (Instron Corp., USA) at a crosshead speed of 1mm/min until fracture. Fracture loads (N) and modes (repairable or catastrophic) were recorded. Two-way analysis of variance was used for statistical analysis with the level of significance seat p
Results. The mean values (±SD) for fracture loads measured in Newtons were for the group A1: 1.4mm - 405,04N (±100.04); and A2: 1.6 mm - 503,09N (±109.01); for Group B1: 1.4mm - 401.07N (±75.02) and B2: 1.6mm - 507.13N (±101.08), for Group C1: 1.4mm - 479.01N (±109.12) and C2: 1.6mm - 567.06N (±134.37), for group D1: 1.4mm - 601.73N (±103.52) and D2: 1.6mm - 675.79N (±171.09), for Group E1: 1.4mm - 719.99N (±220.02) and E2: 1.6mm - 861.06N (±237.15).
Failure patterns within those 1.4 – 1.6mm Y-TZP posts - E-MAX cores groups revealed noncatastrophic failure in group A = 100% - 100% for 0 mm, group B = 100% - 100% for 0.5mm; group C – 91.7% - 91.7% for 1mm, group D = 91.7% - 75% for 1.5mm; and 66.7% - 58.3% for 2mm both of groups E.
Conclusion. With the limitations of this study, the teeth prepared without, 0.5mm and 1mm internal ferrule preparation restored with 1.4 - 1.6mm zirconia posts with retentive coronal part demonstrated significantly lower failure loads then those with 1.5 and 2mm IF. The results showed that zirconia posts with retentive coronal part and 1.5mm - 2mm internal ferrule preparation which contribute to increasing the fracture resistance of the restored root-coronary dental complex, show significance higher fracture resistance. Significant higher % of reparable fractures was determined in all of experimental groups.