The effect of thermomechanical aging on the fracture resistance of additively and subtractively manufactured polyetheretherketone abutments.
J Dent
; 149: 105225, 2024 Oct.
Article
de En
| MEDLINE
| ID: mdl-38969266
ABSTRACT
OBJECTIVES:
To evaluate the fracture resistance (FR) of polyetheretherketone (PEEK) abutments produced by additive and subtractive methods compared to milled zirconia abutments.METHODS:
Custom abutments were designed on Ti-base abutments and produced from three different materials, namely additively manufactured PEEK (PEEK-AM), subtractively manufactured PEEK (PEEK-SM), and zirconia (N = 60). PEEK-AM abutments were printed using PEEK filaments (VESTAKEEP®i4 3DF-T, Evonik Industries AG) on a M150 Medical 3D Printer (ORION AM) by fused filament fabrication (FFF). All surface treatments were carried out according to the manufacturer's instructions. All abutments were cemented on Ti-bases with hybrid abutment cement and then restored with milled zirconia crowns. Each subgroup was divided into non-aged and aged subgroups (n = 10). The aged groups were subjected to thermomechanical aging (49 N, 5-55 °C, 1.2 million cycles). FR tests were performed by using an universal testing machine. Data were statistically analyzed with one-way and two-way ANOVA and t-test.RESULTS:
The survival rate of the specimens after aging was determined as 100%. It was found that both the material and aging had a significant effect on the FR (p<.001). There was a statistical difference among the fracture values of the groups (p<.001). In both the aged and non-aged groups, PEEK-AM showed the statistically lowest FR, while the highest FR was seen in the zirconia group, which was significantly higher than the PEEK-SM (p<.001).CONCLUSION:
Hybrid abutments were successfully manufactured, and extrusion-based processed PEEK seems to be a good alternative to subtractive processed PEEK. However, since subtractive manufacturing still appears to be superior, further developments in additive manufacturing are needed to further improve the quality of 3D-printed PEEK parts, especially in terms of accuracy and bonding between adjacent layers. CLINICALSIGNIFICANCE:
Additively manufactured PEEK abutments have the potential to be an alternative for implant-supported restorations in the posterior region.Mots clés
Texte intégral:
1
Collection:
01-internacional
Base de données:
MEDLINE
Sujet principal:
Polyéthylène glycols
/
Polymères
/
Zirconium
/
Benzophénones
/
Test de matériaux
/
Piliers dentaires
/
Échec de restauration dentaire
/
Matériaux dentaires
/
Analyse du stress dentaire
/
Cétones
Limites:
Humans
Langue:
En
Journal:
J Dent
/
J. dent
/
Journal of dentistry
Année:
2024
Type de document:
Article
Pays de publication:
Royaume-Uni