What has been your experience with cementing crowns and bridges on implant abutments?
We have had some problems with resin and glass ionomer cements. They may be strong, but it can be very difficult to remove the excess.
Most of the implant companies advocate permanent cementation because they say the problems with screw loosening is now a thing of the past. So possibly there is no need to use temporary cement.
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according to my experience one should go to the glassinomer or polycarboxylate , both are good for cementation.
I still don’t think you should never use permanent cement for implant crown cementation. Screw is made to be losen.
I don’t use screw retained system any more.
Regardless of the depth of the implant, if one chooses to have their lab fabricate a custom abutment the margin of of the crown can be placed just below the gingival crest where excess cement removal is easier.
I think that there are indications for both and anyone who says”I do not use screw retained restorations” hssn’t been experienced enough to resllize that retrievability cannot always be achieved with permanently cementerd restoraions.
has anyone used the implant restoration known as the IAC (integrated abutment crown)that does not use screws or cement?
How to deliver the final prosthesis is a question without a definate answer.
When dealing with dental implants, the key word is “retrievability”
There is no certainty that a crown cemented on an implant abutment that has a screw or morse taper to retain the abutment will loosen.
There is no guarantee that a permenent crown cemented with temporary cement will easily unfasten when you try to separate it.
Plan in advance where the retaining screw under the permanent crown can be accessed, by placing a mark in the porcelain, so that if need be , a hole can be drilled through the cemented crown, and the abutment released……outside the mouth, the application of heat will break down cement.
Do not attempt to tap too vigorously on an implant supported crown……..you will possibly fracture the screw,fracture the abutment,fracture
the implant body, or at worst….extract the implant….. good luck
Nobody worries about retrievability with crowns on natural teeth. Implants don’t need to be treated much differently. That being said, I usually do prefer provisional cement just in case the screw loosens. I have of course had the situation where I could not remove a crown cemented with temp bond and had to cut it off. So, I guess you have to go woth your gut feeling on this one. Probably a non-setting cement such as tempo-sil would be great fofr a couple fo weeks, followed by vaseline plus temp bond. Then decide where to go next
Does anyone know of a permanent cement remover for in the mouth??
Thank You!
How much cement should be used to place a crown in an implant? If you experience a severe infection and cement has to be surgically removed, is the dentist who placed the crown at fault?
Can’t not keep my crown attached to the abutment. Changed bite to eliminate any contact with other teeth, even tried laser treatment to remove what seemed to be excess soft tissue from around the abutment. Permanently cemented the crown and it lasted only two weeks. This is the third attempt to reattach the crown. This is a tapered abutment (larger dia, at the implant and tapers down as it extends away from the implant. The first cemented attachment lasted two years but now each re-attachment lasts only a few months. Could the taper in the crown be enlarged from cement removal and now does not match the abutment? Suggestions?
Tim, Try crown lengenthening of the implant and prep down onto the implant. Then reimpress etc.
Tim, etch or sandblast the abutment and the inner surface of the crown and cement with glass ionomer.
I would try Panavia (with metal primer, both on the abutment and in the crown).
I usually use zinc phosphate or poly carboxylate cement. I never use a glassionomer cement for implant cases. I never use screw retained crowns or bridges. I will use a screw access hole, which heips with getting the unit cemented with closed margins. Rem3ember hydrolic pressure.