J Adv Periodontol Implant Dent. 2023;15(2): 117-122.
doi: 10.34172/japid.2023.015
PMID: 38357335
PMCID: PMC10862043
  Abstract View: 353
  PDF Download: 213

Research Article

Evaluation of UV photofunctionalization effect on ultrastructural properties of SLA titanium disks: An in vitro study

Behzad Houshmand 1 ORCID logo, Zeinab Rezaei Esfahroodi 1, Aliasghar Behnamghader 2, Sadegh Mohammadreza 3* ORCID logo, Aytan Azizi 4, Kave Ramezani 1

1 Department of Periodontics, Faculty of Dentistry,Shahid Beheshti University of Medical Sciences, Tehran, Iran
2 Research Department of Nano-Technology and Advanced Materials, Karaj, Iran
3 Department of Periodontics, Faculty of Dentistry, Qazvin University of Medical Sciences, Qazvin, Iran
4 Department of Endodontics, Faculty of Dentistry, Qazvin University of Medical Sciences, Qazvin, Iran
*Corresponding Author: Sadegh Mohammadreza, Email: sadegh.mohamadreza1370@gmail.com


Background. The success rate of dental implants diminishes over time; the lack of osseointegration and infection are the major causes of most implant failures. One of the effective methods to improve the surface properties is to irradiate ultraviolet (UV) light. This study investigated the effect of UV photofunctionalization on the ultrasuperficial properties of sandblasted, large-grit, acid-etched (SLA) titanium discs.

Methods. In this in vitro study, 24 sandblasted and acid-etched titanium discs, with a lifespan of more than four weeks, were categorized into three groups (n=8): control, ultraviolet C (UVC), and ultraviolet B (UVB). Then, they were exposed to a UV light source for 48 hours at a 1-cm distance. In addition to measuring the contact angle between the liquid and the disc surface in each of the three groups, the atomic concentrations of carbon, oxygen, and nitrogen atoms were measured at three different sites on each disc. One-way ANOVA and post hoc Tukey tests were used to analyze data.

Results. The mean concentration of carbon atoms significantly differed in the control, UVC, and UVB groups (P<0.001). The mean concentrations of nitrogen atoms differed significantly between the three groups (P<0.001). However, the mean concentrations of oxygen atoms were not significantly different between the three groups. In examining the contact angle, wettability was higher in the UVC group than in the UVB group and higher in the UBV group than in the control group.

Conclusion. Photofunctionalization with UV light significantly decreased carbon and nitrogen concentrations on the surface of titanium implants, indicating that the implant’s superficial hydrocarbons were eliminated. It was observed that UVC photofunctionalization was more effective than UVB photofunctionalization in reducing superficial contamination and improving wettability.

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Submitted: 14 Dec 2021
Revision: 17 Aug 2023
Accepted: 26 Aug 2023
ePublished: 11 Sep 2023
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