Ispitivanje optimalnih polimerizacijskih protokola za brzo-polimerizirajuće bulk fill kompozitne materijale

master's thesis

• Title (english): Testing of optimal polymerization protocols for fast polymerizing bulk fill composite materials
• Author: Ana Crnadak
• Mentor: Danijela Marović (mentor)
• Committee member: Danijela Marović (predsjednik povjerenstva)
• Committee member: Višnja Negovetić Mandić (član povjerenstva)
• Committee member: Božana Lončar Brzak (član povjerenstva)
• Granter: University of Zagreb; School of Dental Medicine; (Department of Endodontics and Restorative Dentistry); Zagreb
• Defense date and country: 2020-09-18, Croatia
• Scientific / art field, discipline and subdiscipline: BIOMEDICINE AND HEALTHCARE; Dental Medicine

Abstract

Svrha ovog istraživanja bila je ispitati utjecaj polimerizacije uređajem vrlo visokog intenziteta
zračenja pri kratkom razdoblju od 3 sekunde na polimerizaciju nove generacije bulk-fill
kompozitnih materijala.
Ispitana su četiri materijala: Filtek One Bulk Fill (3M, St. Paul, SAD), Tetric PowerFill (Ivoclar
Vivadent, Schaan, Lihtenštajn), Tetric PowerFlow (Ivoclar Vivadent) te SDR (Dentsply,
Konstantz, Njemačka). Materijali (n = 5) polimerizirani su standardnim (950 mW/cm2
) ili 3 s
protokolom osvjetljavanja (2652 mW/cm2
; Bluephase PowerCure, Ivoclar Vivadent). Nakon
izrade polimerizirani uzorci 29 dana bili su pohranjeni u mraku u fiziološkoj otopini na 37 °C
te skladišteni u tamnom eksikatoru 3 dana. Stupanj konverzije izmjeren je pomoću Ramanovog
spektrometra (Spectrum GX Perkin- Elmer, Waltham, MA, SAD) sa snagom lasera 850 mW i
rezolucijom 4 cm-1 s 150 skenova/mjerenju. Srednje vrijednosti statistički su uspoređene
uporabom jednosmjerne ANOVA-e s Tukeyjevim prilagođavanjem za više usporedbi, na
ukupnoj razini značajnosti od 0,05.
Visok stupanj konverzije pokazali su svi ispitani materijali polimerizirani standardnim
protokolom osvjetljavanja, kao i 3 s polimerizacijom. Nije bilo razlike u stupnju konverzije
između različitih polimerizacijskih protokola za Tetric PowerFill i SDR Plus Bulk Fill
Flowable. U skupini uzoraka polimeriziranih 3 s donji uzorci na dubini 2 − 4 mm bili su nešto
slabije polimerizirani.
Polimerizacija 3 s fotopolimerizacijskim uređajem vrlo visokog intenziteta ovisi o kemijskom
sastavu kompozitnih materijala i potreban je oprez pri kliničkoj uporabi.

Abstract (english)

The purpose of this study was to examine the effect of polymerization with a very high-intensity
curing unit over a short period of 3 seconds on the polymerization of a new generation of bulkfill composite materials.
Four materials were tested: Filtek One Bulk Fill (3M, St. Paul, USA), Tetric PowerFill (Ivoclar
Vivadent, Schaan, Liechtenstein), Tetric PowerFlow (Ivoclar Vivadent), and SDR (Dentsply,
Konstanz, Germany). Materials (n = 5) were polymerized with a standard (950 mW/cm2
) or 3
s illumination protocol (2652 mW/cm2
; Bluephase PowerCure, Ivoclar Vivadent). After
preparation, the polymerized samples were stored in the dark in saline at 37°C for 29 days and
stored in a dark desiccator for three days. The degree of conversion was measured using a
Raman spectrometer (Spectrum GX Perkin-Elmer, Waltham, MA, USA). Mean values were
statistically compared using a one-way ANOVA with Tukey’s adjustment for multiple
comparisons, at an overall significance level of 0.05.
A high degree of conversion was shown by all tested materials polymerized both by the standard
illumination protocol, as well as with 3 s polymerization. There was no difference in conversion
rate between the different polymerization protocols for Tetric PowerFill and SDR Plus Bulk
Fill Flowable. In the group of samples polymerized 3 s, the lower samples at a depth of 2 - 4
mm were slightly less polymerized.
Polymerization for 3 s with a high light intensity photopolymerization device depends on the
chemical composition of resin composites and caution is advised in clinical application.

• Keywords: kompozitne smole; polimeri
• Keywords (english): Composite Resins; Polymers
• Language: croatian
• URN:NBN: urn:nbn:hr:127:684290
• Study programme: Title: dental medicine; Study programme type: university; Study level: integrated undergraduate and graduate; Academic / professional title: doktor/doktorica dentalne medicine (doktor/doktorica dentalne medicine)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2021-01-21 12:06:48