3D打印图案化微结构氧化锆桩粘接性能及弯曲强度的研究

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[中图分类号] R783.2[文献标志码]A [doi] 10.7518/hxkq.2025.2025119

[Abstract]ObjectiveThis study aims to design surface paterns using integrated programming software on zirconia posts fabricated through 3Dprinting.MethodsAtype33Mfiberpost was builtasaresearch model，andHyperMil2021 software was applied to design linear overflow grooves extending from the apex to the base on the post surface.The design parameters included the number， depth，and width of the overflow grooves.Five groups of patterned microstructured zirconia posts were designed，withthe3Mfiberpostas thecontrol group.Micro-push-outandthree-point bending tests wereused tomeasurethebonding and flexural strengths of the paterned microstructured zirconia posts.The failure mode of bonding was analyzed by using a stereomicroscope.ResultsThe patterned microstructure significantly increased the bond strength of zirconia posts （P<0.05） .Bonding strength ranged from 9.80MPa±0.64 MPa to 26.49MPa±0.94 MPa at the base of the root， from 9.26MPa±1.08MPa to 18.51MPa±0.93N IPaatthecenterof theroot，and from 6.74MPa±0.31 MPa to 13.00MPa± （2号 0.71MPa at the apex of the root. The implementation of patterned microstructures reduced the flexural strength of the zirconia post （P<0.05） ，and flexural strength ranged from 378.3MPa±24.18N IPato 587.4MPa±36.60MPa .The failure mode of zirconia post adhesions treated with paterned microstructures was mainly mixed failure. ConclusionPatterned microstructured zirconia posts with improved flexuralstrength andadhesive propertiescould be produced byusing 3D printing.The bonding and flexural strengthsofthe paterned zirconiaposts can meet the clinicalrequirements for custom post-and-core design.

[Key words] 3D printing； zirconia post; patterned treatment; bonding strength； flexural strength

重度龋坏、牙外伤等导致牙体硬组织大量丢失的牙体缺损通常需要桩核修复来提供固位并提高抗折性]。（剩余11162字）