Advanced search
Start date
Betweenand
Related content
(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Initial investigation of the corrosion stability of craniofacial implants

Author(s):
Beline, Thamara [1] ; Vechiato Filho, Aljomar Jose [2] ; Wee, Alvin G. [3, 4] ; Sukotjo, Cortino [5] ; dos Santos, Daniela Micheline [6] ; Brandao, Thais Bianca [2] ; Ricardo Barao, Valentim Adelino [1]
Total Authors: 7
Affiliation:
[1] Univ Estadual Campinas, Piracicaba Dent Sch, Dept Prosthodont & Periodontol, Sao Paulo - Brazil
[2] Univ Sao Paulo, Fac Med, Inst Canc Sao Paulo, Dent Oncol Serv, Sao Paulo - Brazil
[3] Vet Affairs Nebraska Western Iowa Hlth Care Syst, Maxillofacial Prosthodont, Omaha, NE - USA
[4] Creighton Univ, Sch Dent, Dept Prosthodont, Omaha, NE 68178 - USA
[5] Univ Illinois, Coll Dent, Dept Restorat Dent, Chicago, IL - USA
[6] Sao Paulo State Univ, Aracatuba Dent Sch, Dept Dent Mat & Prosthodont, Sao Paulo - Brazil
Total Affiliations: 6
Document type: Journal article
Source: JOURNAL OF PROSTHETIC DENTISTRY; v. 119, n. 1, p. 185-192, JAN 2018.
Web of Science Citations: 0
Abstract

Statement of problem. Although craniofacial implants have been used for retention of facial prostheses, failures are common. Titanium undergoes corrosion in the oral cavity, but the corrosion of craniofacial implants requires evaluation. Purpose. The purpose of this in vitro study was to investigate the corrosion stability of commercially pure titanium (CP Ti) exposed to simulated human perspiration at 2 different pH levels (5.5 and 8). Material and methods. Fifteen titanium disks were divided into 3 groups (n=5 per group). The control group was subjected to simulated body fluid (SBF) (control). Disks from the 2 experimental groups were immersed in simulated alkaline perspiration (SA(K)P) and simulated acidic perspiration (SA(C)P). Electrochemical tests, including open circuit potential (3600 seconds), electrochemical impedance spectroscopy, and potentiodynamic tests were performed according to the standardized method of 3-cell electrodes. Data were analyzed by 1-way ANOVA and the Tukey honestly significant difference tests (alpha=.05). Results. Simulated human perspiration reduced the corrosion stability of CP Ti (P<.05). The SBF group presented the lowest capacitance values (P<.05). SA(K)P and SA(C)P groups showed increased values of capacitance and showed no statistically significant differences (P>.05) from each other. The increase in capacitance suggests that the acceleration of the ionic exchanges between the CP Ti and the electrolyte leads to a lower corrosion resistance. SA(K)P reduced the oxide layer resistance of CP Ti (P<.05), and an increased corrosion rate was noted in both simulated human perspiration groups. Conclusions. Craniofacial implants can corrode when in contact with simulated human perspiration, whereas alkaline perspiration shows a more deleterious effect. Perspiration induces a more corrosive effect than simulated body fluid. (AU)

FAPESP's process: 16/07269-3 - Magnetron sputtering deposition of tantalum oxide (Ta2O5) films onto titanium surface for biomedical applications: electrochemical behavior, biocompatibility and microbiologic analysis
Grantee:Thamara Beline
Support Opportunities: Scholarships in Brazil - Doctorate