Maxillary zirconia and mandibular pmma for edentulous patients

[Simon_Vincismile]

Hello，I'd like to know what you guys think about it. My customer told me that it could avoid the breakage of zirconia bridges and be good for patient's bone and jaw. He would check the pmma bridges every year and make a new pmma bridge to replace it if neccessary.
Is it the trend for edentulous implant?

 

[Brett Hansen CDT]

Hello，I'd like to know what you guys think about it. My customer told me that it could avoid the breakage of zirconia bridges and be good for patient's bone and jaw. He would check the pmma bridges every year and make a new pmma bridge to replace it if neccessary.
Is it the trend for edentulous implant?

I use milled PMMA(TelioCAD usually) for my "diagnostic waxup" when I do full arch implant restorations. This allows the patient to wear the diagnostic for a few weeks so the doctor can dial in the occulsion and the patient can see if they are happy with the esthetics and function. I've had some patients wear these for over 6 months. I could see them lasting up to a year as long as they were properly cared for,

 

[Contraluz]

Hello，I'd like to know what you guys think about it. My customer told me that it could avoid the breakage of zirconia bridges and be good for patient's bone and jaw. He would check the pmma bridges every year and make a new pmma bridge to replace it if neccessary.
Is it the trend for edentulous implant?

Yes, not sure about a trend, but it is being done. Maybe not necessarily with a 'PMMA', but with a hybrid over a ti-bar or similar, for example.

 

[Simon_Vincismile]

Yes, not sure about a trend, but it is being done. Maybe not necessarily with a 'PMMA', but with a hybrid over a ti-bar or similar, for example.

Right, they usually made a hybrid over the ti-bar

 

[JKraver]

It is basically making a sacrificial arch one to be destroyed so the zirconia upper will stay nice.

 

[tehnik]

I would use hybrid composite instead of PMMA, as PMMA is not meant to be long term. And of course I would use it over ti-bar.

 

[Simon_Vincismile]

It is basically making a sacrificial arch one to be destroyed so the zirconia upper will stay nice.

Do you think if this is a practicable options compared to zirconia for both upper and lower jaw? They listed 3 main advantages:
•Control the wear to primarily the lower arch PMMA. (Lower arch is less aesthetically apparent and PMMA prostheses is easier to repair)
•Avoid high pitch sound created by two opposing zirconia prostheses during mastication
•Reduce the amount of stresses transmitted to the bone

Are these advantages above reasonable?

 

[Simon_Vincismile]

I would use hybrid composite instead of PMMA, as PMMA is not meant to be long term. And of course I would use it over ti-bar.

How about the abrasion between composite and zirconia? How often do you need to check the prostheses and take place it?

 

[tehnik]

I don't know answer to that, but there might be some studies out there. Composite should be more wear resistant than PMMA.

 

[Manikandan]

Do you think if this is a practicable options compared to zirconia for both upper and lower jaw? They listed 3 main advantages:
•Control the wear to primarily the lower arch PMMA. (Lower arch is less aesthetically apparent and PMMA prostheses is easier to repair)
•Avoid high pitch sound created by two opposing zirconia prostheses during mastication
•Reduce the amount of stresses transmitted to the bone

Are these advantages above reasonable?

You are right; in addition patient do find composite or Pmma against zirconia comfortable to chew on vis a vis zirconia vs zirconia.

 

[DianaZ]

Here's a link to a couple of studies: https://www.thejpd.org/article/S0022-3913(19)30733-4/fulltext
https://onlinelibrary.wiley.com/doi/10.1111/jopr.12374


Unfortunately, I can only link to the abstracts, but they give a general idea about material behavior and life cycle.

 

[Simon_Vincismile]

Here's a link to a couple of studies: https://www.thejpd.org/article/S0022-3913(19)30733-4/fulltext
https://onlinelibrary.wiley.com/doi/10.1111/jopr.12374


Unfortunately, I can only link to the abstracts, but they give a general idea about material behavior and life cycle.

Thank you, bro