In recent years the interest of tribology applied to dentistry is taking on a large scale due to its rapid expansion and growth. Intensive experimental research conducted on dental tribology allows to develop a more detailed understanding of all the phenomena that take part in the phenomenon of tooth wear. The purpose of this work is to investigate tribological performances in the tooth-to-tooth contact and material-to-natural tooth contact (zirconia vs. zirconia and natural tooth vs. zirconia). The tribological tests were carried out by using a reciprocating tribometer under lubricated conditions (artificial saliva). The normal force in these tests was 20 N, and the duration was of 60 min. The stroke length was 2 mm, according to the range of displacement used in scientific literature. The wear mass loss evaluation was evaluated by using a gravimetric method. A topographic analysis was carried with a 3D non-contact optical profiler in order to characterize the wear mechanisms present in the worn surfaces after each of tribo-tests. The results show that the minimum value of the COF is obtained in the case of Zirconia vs. Zirconia tribo-couple, corresponding to 0.49±0.03. In the case of the tooth-tooth couple this value is 0.52 ±0.03. The results on the wear mass loss show a very low wear rate when coupling in tribological condition natural tooth with a ceramic restoration (a mean value of 0.5 mg was found). This rate is even lower when the contact is between two artificial zirconia teeth.
On the Dental BioTribology: Comparison of Zirconia/Zirconia and Zirconia/Natural Tooth Friction Coefficients by Using a Reciprocating Tribometer
Ruggiero, Alessandro;D'Amato, Roberto;SBORDONE, Ludovico;LANZA, Antonio
2018
Abstract
In recent years the interest of tribology applied to dentistry is taking on a large scale due to its rapid expansion and growth. Intensive experimental research conducted on dental tribology allows to develop a more detailed understanding of all the phenomena that take part in the phenomenon of tooth wear. The purpose of this work is to investigate tribological performances in the tooth-to-tooth contact and material-to-natural tooth contact (zirconia vs. zirconia and natural tooth vs. zirconia). The tribological tests were carried out by using a reciprocating tribometer under lubricated conditions (artificial saliva). The normal force in these tests was 20 N, and the duration was of 60 min. The stroke length was 2 mm, according to the range of displacement used in scientific literature. The wear mass loss evaluation was evaluated by using a gravimetric method. A topographic analysis was carried with a 3D non-contact optical profiler in order to characterize the wear mechanisms present in the worn surfaces after each of tribo-tests. The results show that the minimum value of the COF is obtained in the case of Zirconia vs. Zirconia tribo-couple, corresponding to 0.49±0.03. In the case of the tooth-tooth couple this value is 0.52 ±0.03. The results on the wear mass loss show a very low wear rate when coupling in tribological condition natural tooth with a ceramic restoration (a mean value of 0.5 mg was found). This rate is even lower when the contact is between two artificial zirconia teeth.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.