Utjecaj stanja površine na trajnost alata za izradu protetskih nadomjestaka

master's thesis

• Title (english): The influence of the surface on the durability of tools for the production of prosthetic restorations
• Author: Iva Ćavar
• Mentor: Zdravko Schauperl (mentor)
• Granter: University of Zagreb; Faculty of Mechanical Engineering and Naval Architecture; Zagreb
• Defense date and country: 2023-07-20, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Mechanical Engineering

Abstract

U ovom diplomskom radu prikazana je usporedba stanja površine triju reznih alata glodalice za
izradu dentalnih protetskih nadomjestaka.
U teorijskom dijelu rada predstavljena je povijest protetskih nadomjestaka, njihova podjela te
materijali od kojih su izrađeni. Nadalje, vrlo detaljno je opisan CAD/CAM sustav za izradu
dentalnih protetskih nadomjestaka uz naglasak na povijesni razvoj i komponente sustava,
materijale koji se obrađuju te prednosti i nedostatke sustava. Posebno je prikazan postupak
strojnog glodanja za izradu protetskih nadomjestaka pri čemu je naglasak postavljen na alat
glodalice, njegovu klasifikaciju, materijale od kojih je izrađen te zahtjeve na svojstva samog
alata.
U eksperimentalnom dijelu rada provedena je SEM analiza površine na nepotrošenim i
potrošenim svrdlima koja su sudjelovala u izradi pedeset zubnih krunica iz blokova
cirkonijevog dioksida u predsinteriranom stanju. Alati su podvrgnuti jednakim parametrima i
uvjetima glodanja zubnih krunica. Svi alati imaju jednaku geometriju i broj reznih oštrica, a
temeljna razlika im je u kemijskom sastavu. Osnovni materijal svih reznih alata je volframov
karbid visokolegiran kobaltom. Jedan ispitivani alat je tvrdi metal bez ikakvih prevlaka, drugi
alat je prevučen dijamantnom prevlakom dok je treći alat prevučen titanij-nitrid prevlakom.
Prevlačenje alata TiN prevlakom provedeno je u sklopu diplomskog rada PACVD postupkom.

Abstract (english)

This Master's thesis compares the different surface properties of three dental milling cutters
used in the production of dental prostheses.
In the theoretical section of this thesis, the history of dental prostheses is given, along with their
classification and types of materials used for their manufacture. Furthermore, the CAD/CAM
system used for creating dental prostheses is thoroughly described, with an emphasis on its
historical development and system elements, as well as its advantages and disadvantages and
the materials it can process. The process of machine milling in the manufacture of dental
prostheses is described in detail, with the focus on the milling tool, its classification, the
materials from which it is made and its property requirements.
In the experimental part of this thesis, an SEM analysis of the intact and worn surfaces of dental
drills used in the fabrication of fifty dental crowns from pre-sintered zirconia blocks was
performed. All three tools were subjected to the same conditions and the same parameters
during the process of milling dental crowns. All tools have the same geometry and the same
number of cutting blades, their fundamental difference lies in their chemical composition. The
base material of all cutting tools is tungsten carbide highly alloyed with cobalt. One of the three
tools is a hard metal without any coatings, while the other two are coated with diamond and
titanium-nitride coating. As a part of this thesis, the PACVD process was used to coat the TiN-coated tool.

• Keywords: protetski nadomjesci; dentalni materijali; CAD/CAM; glodanje; svrdla
• Keywords (english): prosthetic replacements; dental materials; CAD/CAM; milling; burs
• Language: croatian
• URN:NBN: urn:nbn:hr:235:793588
• Study programme: Title: Mechanical Engineering; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka strojarstva (magistar/magistra inženjer/inženjerka strojarstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2023-07-12 16:03:35