Laboratorijska izradba metal-keramičkog rada

master's thesis

• Author: Mario Peić
• Mentor: Marko Jakovac (mentor)
• Granter: University of Zagreb; School of Dental Medicine; Zagreb
• Defense date and country: 2006, Croatia
• Scientific / art field, discipline and subdiscipline: BIOMEDICINE AND HEALTHCARE; Dental Medicine

Abstract

Izradba metal-keramičkog uratka počinje preparacijom zuba i kvalitetnim otiskom. Otisak se koristi za izradu radnog modela koji omogućuje suradnju između stomatologa i tehničara. Slijedi modelacija u vosku te ulaganje. Voštani model izgara bez ostataka te se na njegovo mjesto lijeva metalna legura. Metalna osnova se mora staviti na bataljak bez uporabe sile te mora ležati na bataljku bez savijanja. Debljina metala bi trebala biti 0.3-0.5 milimetara. Da bi se povećala snaga veze metala i keramike površina metala se pjeskari i po potrebi žari u oksidirajućoj atmosferi. Keramika se nanosi u tri osnovna sloja: opaker, deninski i caklinski sloj. Opaker se aplicira prvi da maskira metal, da daje bazičnu boju i da inicira vezu s keramikom. Dentinska keramika daje tijelo restauraciji, a caklinska translucenciju. Apsolutna minimalna debljina keramike je 0.7 milimetara, poželjna 1 milimetar. Kad su željene konture i okluzija postignute, restauracija se podvrgava površinskom tretmanu. Tri uobičajena tretmana uključuju: prirodnu ili autoglazuru,
apliciranu glazuru i poliranje. Oprez treba postojati od prepečenja keramike. Ona se može vratiti u više kristalno stanje i postati mliječnog izgleda, stanje poznato kao devitrifikacija.

Abstract (english)

Making of metal-ceramic restoration begins with tooth preparation and good impression. Impression is used to make precise work model that enables cooperation between dentist and technician. Modelation in wax is next. Than the wax is being invested. Wax model burns without a trace and on his place metal is being cast. Metal coping must be placed on tooth preparation without force and without bending. Metal coping should be at least 0.3 to 0.5 millimeter thick. To increase bond strength between metal and ceramic metal surface is being sand blasted and (if needed) fired in an oxidizing atmosphere. Ceramic is being applied in three elemental layers: opaque, dentin and enamel layer. Opaque ceramic is applied first to mask the metal, to give the restoration its basic shade, and to initiate the porcelain-metal bond. Dentin ceramic gives body to restoration and enamel gives translucency. The absolute minimum thickness of porcelain is 0.7 millimeter, and the desirable thickness is 1.0 millimeter. Once the desired contours and occlusion have been achieved, the restoration must receive a surface treatment. Three commonly used treatments include: natural or autoglaze, applied overglaze, or polishing. Caution must be exercised not to overfire ceramic. It may return to a more crystalline state and become milky in appearance, condition known as devitrification.

• Keywords: metalokeramičke legure
• Keywords (english): Metal Ceramic Alloys
• Language: croatian
• URN:NBN: urn:nbn:hr:127:392902
• 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: Closed access
• Created on: 2024-05-22 08:24:06