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Journal of Peking University(Health Sciences) ›› 2019, Vol. 51 ›› Issue (1): 111-114. doi: 10.19723/j.issn.1671-167X.2019.01.020

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Effects of CAD/CAM titanium alloy surface treatment and resin luting on shear bond strength and durability of composite resin

Bei-bei LI1,2,Ping DI1,△()   

  1. 1. Department of Oral Implantology, Peking University School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing 100081, China
    2. Department of Oral Implantology, Beijing Stomatological Hospital, School of Stomatology, Capital Medical University, Beijing 100050, China
  • Received:2018-08-17 Online:2019-02-18 Published:2019-02-26
  • Contact: Ping DI E-mail:diping2008@163.com
  • Supported by:
    Supported by the Capital Special Fund for Health Development and Scientific Research(2018-2-4102)

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Abstract:

Objective: To assess the effects of two surface treatments (sandblasting, SB; microarc-oxidation, MAO) and resin luting on shear bond strength and durability of titanium alloy and composite-resin. Methods: Eighty cylindrical titanium alloy specimens with a diameter of 10 mm and a height of 8 mm were fabricated by CAD/CAM technique. It was divided into two groups according to the surface treatment methods: sandblasting with Al2O3 particles on the surface of SB specimens; porous ceramic film structure could be formed on the surface of MAO specimens after surface treatment. Each group was classified into SB-resin luting-N group (not used), SB-resin luting-Y group (used), MAO-resin luting-N group (not used), MAO-resin luting-Y group (used) depending on whether or not resin luting was applied. Each specimen was bonded and cured with the Cemerage resin, and the shear bond strength after 0 and 5 000 thermocycling was tested. The results were statistically analyzed. The surface morphology of titanium alloy specimens before and after the shear bond strength test was observed by scanning electron microscopy (SEM). Results:The shear bond strength between titanium alloy and composite-resin was the highest in the SB combined with resin luting group after 0 thermocycling (16.2±1.8) MPa; was the lowest in MAO group after 5 000 thermocycling (8.9±1.5) MPa. The shear bond strength of SB and MAO surface treatment methods combined without resin luting group after 5 000 thermocycling were (10.7±2.2) MPa and (8.9±1.5) MPa, which were statistically lower than those in the thermocycling 0 (P=0.000 and P=0.001). The shear bond strength of SB and MAO surface treatment methods combined with resin luting group after 5 000 thermocycling were (15.5±2.1) MPa and (11.7±1.3) MPa, respectively, which were lower than those in the thermocycling 0 group, but there was no statistical significance (P=0.087 and P=0.234). Conclusion: Both the surface treatment methods of SB and MAO combined with resin luting can improve the shear bond strength and durability of titanium alloy and composite-resin. The SB combined with resin luting is more significant. At present, the effect of SB is better than that of MAO due to the limitation of technical parameters of micro-arc oxidation.

Key words: Titanium alloy, Micro-arc oxidation, Composite resin, Shear bonding strength

CLC Number: 

  • R783.1

Table 1

The shear bond strength of titanium alloy and composite-resin for each group/MPa"

Thermocycling Group Samples Shear bond strength
0 SB resin luting-N 10 12.9±2.5
SB resin luting-Y 10 16.2±1.8
MAO resin luting-N 10 10.0±1.9
MAO resin luting-Y 10 12.0±1.8
5 000 SB resin luting-N 10 10.7±2.2
SB resin luting-Y 10 15.5±2.1
MAO resin luting-N 10 8.9±1.5
MAO resin luting-Y 10 11.7±1.3

Figure 1

Surface morphology of titanium alloy after sandblasting (A) and microarc-oxidation (B)"

Figure 2

Surface morphology of titanium alloy after shear bond strength test A, SB resin luting-N group; B, SB resin luting-Y group; C, adhered resin particles on the titanium alloy; D, MAO resin luting-N group; E, MAO resin luting-Y group; F, the inner compact layer was exposed (arrow). SB, sandblasting; MAO, microarc-oxidation."

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