TY  - JOUR
A1  - Gehrke, Peter
A1  - Abazari, Cyrus
A1  - Schlichter, Kai
A1  - Fischer, Carsten
A1  - Duddeck, Dirk
A1  - Romanos, Georgios
A1  - Weigl, Paul
T1  - Qualitative and semi-quantitative assessment of processing-related surface contamination of one- and two-piece CAD/CAM abutments before and after ultrasonic cleaning
T2  - Materials
N2  - Manufacturing processes of custom implant abutments may contaminate their surfaces with micro wear deposits and generic pollutants. Such particulate debris, if not removed, might be detrimental and provoke inflammatory reactions in peri-implant tissues. Although regulatory guidelines for adequate cleaning, disinfection, or sterilization exist, there does not appear to be a consistent application and data on the amount and extent of such contaminants is lacking. The aim of the present in vitro study was to evaluate the quality and quantity of processing-related surface contamination of computer-aided design/computer-aided manufacturing (CAD/CAM) abutments in the state of delivery and after ultrasonic cleaning. A total of 28 CAD/CAM monotype and hybrid abutments were cleaned and disinfected applying a three-stage ultrasonic protocol (Finevo protocol). Before and after cleaning, the chemical composition and the contamination of the abutments were assessed using scanning electron microscopy (SEM), dispersive X-ray spectroscopy(EDX),andcomputer-aidedplanimetricmeasurement(CAPM).Inthedeliverycondition, monotype abutments showed a significantly higher amount of debris compared to hybrid abutments (4.86±6.10% vs. 0.03 ± 0.03%, p < 0.001). The polishing process applied in the laboratory after bonding the hybrid abutment components reduces the surface roughness and thus contributes substantially to their purity. The extent of contamination caused by computer-aided manufacturing of custom abutments can be substantially minimized using a three-stage ultrasonic protocol.
KW  - CAD/CAM
KW  - contamination
KW  - debris
KW  - hybrid abutment
KW  - monotype abutment
KW  - planimetric measurement
KW  - ultrasonic cleaning
KW  - Finevo
Y1  - 2020
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/55462
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-554624
SN  - 1996-1944
N1  - © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
VL  - 13
IS  - art. 3225
SP  - 1
EP  - 18
PB  - MDPI
CY  - Basel
ER  -