Naslov
Do termocycling and brushing affect stability of pet G orthodontic retainers?

Autori
Šimunović, Luka ; Blagec, Tadeja ; Meštrović, Senka

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Book of abstracts 9th International Congress of the School of Dental Medicine University of Zagreb U: Acta stomatologica Croatica, 57(2) / Klarić, Eva - Zagreb : School of Dental Medicine University of Zagreb, 2023, 195-195

Skup
9th International Congress of the School of Dental Medicine University of Zagreb

Mjesto i datum
Dubrovnik, Hrvatska, 24.03.2023. - 25.03.2023

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Orthodontic Retainers ; Toothbrushing ; PETG

Sažetak
Aim: To evaluate changes of surface roughness and mass of orthodontic retainer materials after exposure to thermocycling and brushing. Materials and Methods: A total number of 96 samples of polyethylene terephthalate glycol (PETG) material from four different manufacturers (Biolon- Dreve ; Erkodur A1- Erkodent ; Track A- Forestadent ; Essix C+ - Raintree Essix) were exposed to thermocycling and simulated brushing. Thermocycling was performed on Thermocycler- SD Mechatronik machine for a total number of 1500 cycles, 5-55 °C, and dwell time 13 seconds. Samples were then exposed to simulated brushing for 30 minutes with 3 different types of toothbrushes according to the number and thickness of filaments (CS 5460, CS 3960, CS 1560). Both surface roughness and mass of the samples were evaluated three times: initial, after thermocycling and after brushing. Since the data followed normal distribution, t-test and one-way ANOVA were used. Results: In all four brands, both thermocycling and brushing increased surface roughness significantly (p<0.001). Surface roughness values after thermocycling did not vary significantly between brands, with Biolon having the lowest and Track A having the highest. In terms of brushing, only Biolon samples showed statistically significant increased roughness after brushing with all three types of brushes (CS 5460: p=0.046 ; CS 3960: p=0.027 ; CS 1560: p=0.027), in comparison to Erkodur A1 where differences were not statistically significant. Thermocycling increased the mass of all samples, but a statistically significant difference was found only in Biolon (p=0.0203), while after brushing, decreased mass was found in all specimens, statistically significant only in Essix C+ (CS 1560: p=0.016). Conclusion: Thermocycling and brushing have an impact on the change in surface roughness and mass of all investigated materials. Of all brands, Erkodur A1 demonstrated the most stability under external influence, whereas Biolon demonstrated the lowest. Key words: Orthodontic Retainers ; Toothbrushing ; PETG

Izvorni jezik
Engleski

Znanstvena područja
Dentalna medicina

POVEZANOST RADA