After hydrofluoric acid etching of the ceramic a layer of salts develops on the surface which acts as a barrier preventing good priming of the surface. Phosphoric acid is thought to remove these salts and dissolve them for a fresh surface. (However this is an arguable matter and some argue against its use)
@@drabyad2498 the phosphate groups in the phosphoric acid fight to bind with the phosphate groups in the cement less adhesion to the crown/tooth interface. Not recommended anymore
@@AHMEDSAlAH-qv3ss dry by air only then put your adhesive..with variolink you don t need to put adhesive in the veneer..you put it only in the tooth surface
@@dr.davident actually I need to know if it’s ok or we will face problems later ,there is a theory says do one step curing (bonding ,cement and veneers) so we will not lose the fitting
@@user-hd3hy4co1h You can not ensure that you get a proper hybrid layer if you co-cure. You need to cure the bonding agent on tooth surface separately to make sure you get a good hybrid layer. As for sitting issues, you need to completely air thin the bonding agent.
Porcelain is brittle like natural tooth but porcelain is so hard to withstand chips and cracking although wrong or heavy frequent compact forces could cause fracture by the way. So it's indicated as veeners or full crowns just for anterior teeth where no heavy forces might be applied on likewise posterior teeth
Quick question Mario, what do you think about curing the bond prior to cement application? Does it make any difference? I see you cure everything all at once, does this give better results? Thanks for sharing!
Louis Barros I cure the adhesive layer prior to bonding the restoration. For me it is critical to have a fully polimerized hybrid layer and curing all at once can create some problems if it does not reach the adhesive layer with the needed energy.
@@puneetsekhon3436 the use on bonding agent in the intaglio surface is only to improve “wetability” of the resin cement to the silanated glass surface.
This video is supposed to show the process of cementation, not color matching. You commented negatively in only way you knew how. It says three things: You don't know much. You're craving negativity. Your comment is irrelevant.
why orthophosphoric acid on already etched porcelain surfuce !!!!
After hydrofluoric acid etching of the ceramic a layer of salts develops on the surface which acts as a barrier preventing good priming of the surface. Phosphoric acid is thought to remove these salts and dissolve them for a fresh surface. (However this is an arguable matter and some argue against its use)
@@drabyad2498 the phosphate groups in the phosphoric acid fight to bind with the phosphate groups in the cement less adhesion to the crown/tooth interface. Not recommended anymore
Can i use this silane in the attached photo from 3M 3M™ Silane Coupling Agent, 68300
Yes you can.
Is the ultrasonic bath necessary?
is the cement light cure or dual cure?
What container is used to carry the veneer when place in ultrasonic bath
Elenza Jacob plastic container
Are u washing silane with water??
Logically No !
@@81od dry by air only ?? then put adhesive bond or what the next step ??
@@AHMEDSAlAH-qv3ss dry by air only then put your adhesive..with variolink you don t need to put adhesive in the veneer..you put it only in the tooth surface
@@81od thank u Dr , all the the best to you❤👍
@@AHMEDSAlAH-qv3ss not at all Dr Ahmed Saiah..you re welcome.!
Which resin cement is recommended
LEGANDARY GAMING NX3 Kavo Kerr
Wished to see every step under high magnification
What about applying bonding ,cement and veneers and cure it at the same time ,don’t you think it’s better?
Why?
@@dr.davident actually I need to know if it’s ok or we will face problems later ,there is a theory says do one step curing (bonding ,cement and veneers) so we will not lose the fitting
@@user-hd3hy4co1h You can not ensure that you get a proper hybrid layer if you co-cure. You need to cure the bonding agent on tooth surface separately to make sure you get a good hybrid layer. As for sitting issues, you need to completely air thin the bonding agent.
Although the ceramic material is brittle material ,but we can use it in less than 1mm for facial and occlusal veneer ..why??
Porcelain is brittle like natural tooth but porcelain is so hard to withstand chips and cracking although wrong or heavy frequent compact forces could cause fracture by the way.
So it's indicated as veeners or full crowns just for anterior teeth where no heavy forces might be applied on likewise posterior teeth
@@emyfekry3344 can it br used for 2 or more units bridge for the anteriors or just for individual crown?
وا ډیر شایسته
Thanks a lot for the video ❤️
Ultrasonic not ultrasound ! and thanks for the amazing video :)
Thanks for catching the typo. We will correct it.
What's the difference between those words?
Quick question Mario, what do you think about curing the bond prior to cement application? Does it make any difference? I see you cure everything all at once, does this give better results? Thanks for sharing!
Louis Barros I cure the adhesive layer prior to bonding the restoration. For me it is critical to have a fully polimerized hybrid layer and curing all at once can create some problems if it does not reach the adhesive layer with the needed energy.
@@romerodentalseminars did you cure the bond on the intaglio surface of the veneer before applying the cement?
@@puneetsekhon3436 No, you should not cure.
@@romerodentalseminars thanks for the prompt reply, appreciate it. What is the reason behind not curing it before the cement?
@@puneetsekhon3436 the use on bonding agent in the intaglio surface is only to improve “wetability” of the resin cement to the silanated glass surface.
What a dreadful shade match
This video is supposed to show the process of cementation, not color matching.
You commented negatively in only way you knew how.
It says three things:
You don't know much.
You're craving negativity.
Your comment is irrelevant.
Can we use luting GIC ??
Absolutely not.