Utjecaj stupnja maturacije i zaštitnog premazivanja na promjenu boje restaurativnih materijala

master's thesis

• Title (english): The impact of the maturation degree and protective coating on the discoloration of the restorative materials
• Author: Klara Vresk
• Mentor: Ana Ivanišević (mentor)
• Granter: University of Zagreb; School of Dental Medicine; Zagreb
• Defense date and country: 2024-07-03, Croatia
• Scientific / art field, discipline and subdiscipline: BIOMEDICINE AND HEALTHCARE; Dental Medicine

Abstract

U kontekstu potiskivanja amalgama iz kliničke prakse, staklenoionomerni cementi
predstavljaju jednu od zamjenskih opcija. Biokompatibilnost je njihova komparativna prednost,
no njihova su mehanička i estetska svojstva inferiorna u usporedbi s kompozitnim materijalima.
Promjena boje restaurativnih materijala određena je svojstvima materijala i djelovanjem
vanjskih čimbenika. Cilj ovog istraživanja bio je utvrditi utjecaj stupnja maturacije i zaštitnog
premazivanja na promjenu boje restaurativnih materijala temeljenih na staklenim ionomerima
u uvjetima cikličkog izlaganja diskolorirajućem sredstvu.
U istraživanju su ispitana dva materijala: visokoviskozni stakleni ionomer Ketac Universal
Aplicap i staklo-hibridni materijal Equia Forte HT Fil. Uzorci su podijeljeni u osam
eksperimentalnih skupina – svaki materijal u nematuriranom i maturiranom obliku s
pripadajućim zaštitnim premazom i bez premaza. Inicijalna boja određena je za svaki uzorak
prije cikličkog izlaganja zelenom čaju te ponovo po završetku izlaganja kako bi se izračunala
promjena boje (ΔE). Rezultati su statistički obrađeni ANOVA te post-hoc Bonfferoni testom s
razinom statističke značajnosti α=0.05.
Dobivenim rezultatima utvrđeno je da skupine višeg stupnja maturacije i premazane zaštitnim
premazom imaju manju promjenu boje, statistički značajnu za skupine Equia (p<0,05).
Usporedbom materijala, značajno manja promjena boje zabilježena je u skupinama
visokoviskoznog staklenoionomernog cementa u odnosu na staklo-hibridni materijal (p<0,05).
U okviru ovog in vitro istraživanja može se zaključiti da stupanj maturacije i zaštitno
premazivanje utječu na stabilnost boje materijala temeljenih na staklenim ionomerima.
Maturacija i zaštitni premaz smanjili su stupanj diskoloracije visokoviskoznog staklenog
ionomera, ali ne značajno. Promjena boje staklo-hibridnog restaurativnog materijala u uvjetima
cikličke izloženosti diskolorirajućem sredstvu bila je značajna.

Abstract (english)

In the context of phasing out amalgam from clinical practice, glass ionomer cements represent
one of the alternative options. Biocompatibility is their comparative advantage, but their
mechanical and aesthetic properties are inferior compared to composite materials. The
discoloration of restorative materials is determined by the material properties and the influence
of external factors. This study aimed to determine the impact of the maturation degree and
protective coating on the discoloration of glass ionomer-based materials under conditions of
cyclic exposure to a discoloring agent.
Two materials were tested in the study: high-viscosity glass ionomer Ketac Universal Aplicap
and glass-hybrid material Equia Forte HT Fil. Samples were divided into eight experimental
groups - each material in both non-matured and matured forms with and without the protective
coating. The initial color was determined for each sample before cyclic exposure to green tea
and again after exposure to calculate the color change (ΔE). The results were statistically
analysed using ANOVA and post-hoc Bonferroni test with a level of significance α=0.05.
The results showed that groups with a higher maturation degree and coated with a protective
coat had a smaller color change, statistically significant for the Equia groups (p<0.05).
Comparing the materials, a significantly smaller color change was observed in the highviscosity glass ionomer cement groups compared to the glass-hybrid material (p<0.05).
Within the framework of this in vitro study, it can be concluded that the degree of maturation
and protective coating affect the color stability of glass ionomer-based materials. Maturation
and protective coating reduced the degree of discoloration of the high-viscosity glass ionomer,
but not significantly. The color change of the glass-hybrid restorative material under the
conditions of cyclic exposure to a discoloring agent was significant.

• Keywords: diskoloracija; kolorimetrija; maturacija; staklo-hibridni materijal; staklenoionomerni cement; zaštitni premaz
• Keywords (english): discoloration; colorimetry; maturation; glass-hybrid material; glass ionomer cement; protective coating
• Language: croatian
• URN:NBN: urn:nbn:hr:127:572590
• Study programme: Title: Integrated undergraduate and graduate university study of 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: 2024-06-22 19:53:40