Distribution and Chemical Speciation of Exogenous Micro- and Nanoparticles in Inflamed Soft Tissue Adjacent to Titanium and Ceramic Dental Implants.
Anal Chem
; 92(21): 14432-14443, 2020 11 03.
Article
in En
| MEDLINE
| ID: mdl-32970419
ABSTRACT
Degradation of the implant surface and particle release/formation as an inflammation catalyst mechanism is an emerging concept in dental medicine that may help explain the pathogenesis of peri-implantitis. The aim of the present study was a synchrotron-based characterization of micro- and nanosized implant-related particles in inflamed human tissues around titanium and ceramic dental implants that exhibited signs of peri-implantitis. Size, distribution, and chemical speciation of the exogenous micro- and nanosized particle content were evaluated using synchrotron µ-X-ray fluorescence spectroscopy (XRF), nano-XRF, and µ-X-ray absorption near-edge structure (XANES). Titanium particles, with variable speciation, were detected in all tissue sections associated with titanium implants. Ceramic particles were found in five out of eight tissue samples associated with ceramic implants. Particles ranged in size from micro- to nanoscale. The local density of both titanium and ceramic particles was calculated to be as high as â¼40 million particles/mm3. µ-XANES identified titanium in predominantly two different chemistries, including metallic and titanium dioxide (TiO2). The findings highlight the propensity for particle accumulation in the inflamed tissues around dental implants and will help in guiding toxicological studies to determine the biological significance of such exposures.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Titanium
/
Dental Implants
/
Ceramics
/
Nanoparticles
/
Peri-Implantitis
/
Microspheres
Type of study:
Prognostic_studies
Limits:
Humans
Language:
En
Journal:
Anal Chem
Year:
2020
Type:
Article
Affiliation country:
Germany