280 KB0 KB200020262026Jagličić, ZvonkoKocijan, AleksandraMajerič, PeterMihor, PeterRudolf, RebekaSvetec, Milanštevilka:3letnik:60str. 445-449DOI:10.17222/mit.2026.1679ISSN:1580-2949COBISSID_HOST:281786883URN:URN:NBN:SI:doc-OZ55FHM8enInštitut za kovinske materiale in tehnologijeMateriali in tehnologijebase and noble dental alloysbazne in plemenite dentalne zlitinecharacterizationkarakterizacijamagnetic forcemagnetic resonance imaging safetymagnetna silavarnost slikanja z magnetno resonancoQuantitative measurement of magnetic force in basic and precious dental alloys for porcelain technique| Kvantitativno merjenje magnetne sile na osnovnih in plemenitih zobnih zlitinah za porcelansko tehniko|Precious dental alloys based on gold, platinum, palladium or silver exhibit excellent corrosion resistance, high biocompatibility and optimal mechanical properties for use in prosthetic dentistry. In comparison, base dental alloys based on chromium, cobaltor nickel are cheaper, have excellent mechanical properties but poorer corrosion resistance and biocompatibility. This research examined the magnetic properties of dental alloys in a magnetic field, which vary with composition and electronic structure. Materials can be classified as diamagnetic, paramagnetic or ferromagnetic, depending on how they respond to an external magnetic field, with noble metals usually showing weak or negligible magnetic behaviour. Experimental results of magnetic force measurements in precious dental alloys have shown that most exhibit diamagnetic properties, being weakly repelled by a magnetic field, and do not retain any magnetization when the magnetic field is removed. One of the tested precious-metal alloys ex-hibited paramagnetic behaviour, indicating a weak attraction in a magnetic field. In contrast, all studied dental base-metal alloys exhibited stronger paramagnetic interactions with magnetic fields. Diamagnetic properties of precious-metal dental alloys present a significant advantage in the medical environment, especially in magnetic resonance imaging (MRI) as diamagnetic materials do not interfere with magnetic fields and thus reduce image distortion and patient risk during MRI. However, paramagnetic base-metal dental alloys can cause local heating or imaging artefacts under MRI conditions. Therefore, precious-metal dental alloys are more suitable for patients who may require MRI, as they combine functional durability with greater safety in medical diagnosticsPlemenite zobne zlitine na osnovi zlata, platine, paladija ali srebra imajo odlično korozijsko odpornost, visoko biokompati­bilnost in optimalne mehanske lastnosti za uporabo v protetični stomatologiji. V primerjavi z njimi so osnovne zobne zlitine na osnovi kroma, kobalta ali niklja cenejše, z odličnimi mehanskimi lastnostmi, vendar slabšo korozijsko odpornostjo in biokompatibilnostjo. V tem članku avtorji opisujejo raziskavo, ki je preučevala magnetne lastnosti zobnih zlitin, ki se razlikujejo glede na sestavo in elektronsko strukturo. Materiale lahko razdelimo na diamagnetne, paramagnetne ali feromagnetne, glede na to kako se odzivajo na zunanje magnetno polje, pri čemer plemenite kovine običajno kažejo šibko ali zanemarljivo magnetno obnašanje. Eksperimentalni rezultati merjenja magnetne sile v plemenitih zobnih zlitinah so pokazali, da večina kaže diamagnetne lastnosti, kar pomeni, da jih magnetno polje šibko odbija in da ne ohranijo nobene magnetizacije, ko je magnetno polje odstranjeno. Ena od testiranih plemenitih zlitin je pokazala paramagnetno obnašanje, kar kaže na šibko privlačnost v magnetnem polju. Nasprotno pa so vse raziskane osnovne (bazne) zobne zlitine pokazale močnejše paramagnetne interakcije z magnetnimi polji. Diamagnetne lastnosti plemenitih zobnih zlitin predstavljajo pomembno prednost v medicinskem okolju, zlasti pri slikanju z magnetno resonanco (MRI), saj diamagnetni materiali ne motijo magnetnih polj in s tem zmanjšujejo popačenje slike in tveganje za paciente med slikanjem z magnetno resonanco. Paramagnetne bazne zobne zlitine pa lahko v pogojih slikanja z magnetno resonanco povzročijo lokalno segrevanje ali slikovne artefakte. Zato so plemenite zobne zlitine primernejše za paciente, ki potrebujejo slikanje z magnetno resonanco, saj združujejo funkcionalno vzdržljivost z večjo varnostjo v medicinski diagnostikiTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaInštitut za kovinske materiale in tehnologije