In vitro effect of anodization of titanium abutments on their tensile bond strength to implant‑supported lithium disilicate all‑ceramic crowns

Abstract

Background: The retention of cement‑retained implant‑supported restorations can be affected
by surface treatments such as anodizing. This study aimed to assess the effect of the anodization
of titanium abutments on their tensile bond strength to implant‑supported lithium disilicate (LDS)
all‑ceramic crowns.
Materials and Methods: This in vitro, experimental study was conducted on 26 straight abutments
in two groups of anodization and control. In the anodization group, seven flat 9 V batteries connected
in series were used to generate 64 V energy. A glass container was filled with 250 mL of distilled
water, and 1 g of trisodium phosphate was added to it to create an electrolyte solution. The anode
was then disconnected and the abutment was rinsed with acetone and deionized water. The
surface roughness of abutments was measured by a profilometer. The abutments were scanned
by a laboratory scanner, and maxillary central incisor monolithic crowns were fabricated by inLab
SW18 software. The crowns were seated on the abutments and temporarily cemented with
TempBond. They were then incubated in artificial saliva and subjected to 5000 thermal cycles. The
tensile bond strength of crowns was then measured. Data were analyzed by the Student’s t‑test
and Mann–Whitney U‑tests (α =0.05).
Results: The mean bond strength was significantly higher in anodized abutments (P = 0.003). The
surface roughness of anodized abutments was slightly, but not significantly, higher than that of the
control group (P > 0.05). The frequency of adhesive failure was almost twice higher in anodized
abutments.
Conclusion: Anodization of titanium abutments significantly improved their tensile bond strength
to implant‑supported LDS all‑ceramic crowns.
Key Words: Dental abutments, dental implants, single‑tooth, surface properties, titanium oxide

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 Azita Mazaheri Tehrani: Pubmed,Google Scholar