| |
 |
UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-23 18:01 |
 |
|
|
|
Conference: Bucharest University Faculty of Physics 2014 Meeting
Section: Solid State Physics and Materials Science
Title:
Nanomechanical properties of dental surfaces study as an irradiated treatment simulation
Authors:
Cristina IONESCU (1), Madalina Violeta PERIEANU (2), L.S. CRACIUN (1)
Affiliation:
(1) Horia Hulubei National Institute for Physics and Nuclear Engineering, P.O.B. MG-6, 077125 Magurele, Romania
(2) Facultatea de Medicina Dentara, Universitatea de Medicinå ºi Farmacie „Carol Davila“, Bucureºti
E-mail
cristina.ionescu@nipne.ro
Keywords:
radiotherapy, gamma irradiation, AFM, hardness
Abstract:
Patients with head and neck cancers are usually subjected to radiotherapy, using therapeutically doses of 60Gy. The purpose of this study was to investigate the effect of gamma irradiation on hard dental tissues hardness. Three human teeth have been prepared in the form of discs according to AFM sample preparation and divided in two groups: control group, respectively 60Co irradiated group. In order to reduce the risk of fissures the hardness of enamel and intertubular dentine was evaluated using nanoindentation coupled with AFM technique. The analysis was made in three different locations per tooth near the dentino-enamel junction. The mean hardness values decreased for both enamel and dentin when comparing unirradiated-irradiated teeth. Also information about DEJ width, dentinal tubules diameter and depth were obtained. This study confirms the applicability of AFM nanoindentation for studying biological samples.
|
|
|
|