Digitalna analiza i usporedba trodimenzionalno skeniranih otisaka iz alginata, polivinilsiloksana i polietera potpuno bezubog pacijenta

master's thesis

• Title (english): Digital analysis and comparison of three-dimensionally scanned impressions from alginate, polyvinylsiloxane and polyether in a completely edentulous patient
• Author: Manuela Miloš
• Mentor: Maja Žagar (mentor)
• Granter: University of Zagreb; School of Dental Medicine; Zagreb
• Defense date and country: 2023-07-05, Croatia
• Scientific / art field, discipline and subdiscipline: BIOMEDICINE AND HEALTHCARE; Dental Medicine; Prosthetic Dentistry

Abstract

Otisni su postupci sastavni dio protetske opskrbe pacijenata. Budući da preciznost protetskog rada počiva na preciznosti radnog modela, važno je razumjeti faktore koji utječu na uspjeh otisnog postupka. Otisni materijali posjeduju različita svojstva poput preciznosti, elastičnosti, dimenzijske stabilnosti, hidrofilnosti i drugih. Dijele se na elastične i neelastične otisne materijale. Danas u upotrebi dominiraju elastični materijali koji se dodatno dijele na hidrokoloide i sintetičke elastomere. Od hidrokoloida najčešće korišten materijal je alginat, dok se od sintetičkih elastomera uporabom ističu polivinilsiloksani i polieteri. Svaka od ovih vrsta otisnih materijala pokazuje određene prednosti i nedostatke, no indikacije za njihovu uporabu obuhvaćaju gotovo sve kliničke situacije. Suvremeno doba u dentalnu je medicinu dovelo i novi način registracije intraoralnog stanja uporabom intraoralnog skenera. Stvaranjem velikog broja preklapajućih slika, intraoralni skeneri softverskom obradom trodimenzionalno reproduciraju skeniranu regiju. Unatoč brzini, ugodnosti i preciznosti, visoka cijena predstavlja barijeru za njihovu širu primjenu. Općenito smatra se da su polivinilsiloksani i polieteri zbog izvrsnih svojstava materijali izbora za izradu visokopreciznih radnih modela, dok se alginati koriste u situacijama kada visoka preciznost nije imperativ. Ipak, digitalnom analizom dimenzijskih i površinskih svojstava ovih triju skupina materijala nije dokazana smanjena vrijednost alginata u odnosu na polivinilsiloksan i polieter. Stoga se, iako su daljnja istraživanja još potrebna, postavlja pitanje upotrebljivosti alginata za izradu radnih modela.

Abstract (english)

Impression procedures are an integral part of patients' prosthetic supply. Since the accuracy of prosthetic work relies on the precision of the working model, it is important to understand the factors that influence the success of the impression procedure. Impression materials possess different properties such as accuracy, elasticity, dimensional stability, hydrophilicity, and others. They are divided into elastic and non-elastic impression materials. Currently, elastic materials dominate the market and are further categorized into hydrocolloids and synthetic elastomers. The most commonly used hydrocolloid material is alginate, while polyvinylsiloxanes and polyethers stand out among synthetic elastomers. Each of these types of impression materials exhibits certain advantages and disadvantages, but their indications cover almost all clinical situations. The modern era has introduced a new way of registering intraoral conditions using intraoral scanners in dental medicine. By capturing a large number of overlapping images, intraoral scanners create a three-dimensional reproduction of the scanned region through software processing. Despite their speed, convenience, and precision, the high cost presents a barrier to their wider application.
In general, polyvinylsiloxanes and polyethers are considered materials of choice for fabricating high-precision working models, while alginates are used in situations where high precision is not imperative. However, through digital analysis of the dimensional and surface properties of these three material groups, the reduced value of alginates compared to polyvinylsiloxanes and polyethers has not been proven. Therefore, although further research is still needed, the usability of alginates for making working models is being questioned.

• Keywords: analogni otisak; digitalni otisak; alginat; polivinilsiloksan; polieter; stomatološki materijali za otiske
• Keywords (english): analog impression; digital impression; alginate; polyvinylsiloxane; polyether; dental impression materials
• Language: croatian
• URN:NBN: urn:nbn:hr:127:179510
• 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: 2023-06-29 08:29:28