What is CALM?
Crown – Abutment Loosening Method, or CALM, is a patent pending solution for cemented implant restorations which:
- greatly simplifies abutment/suprastructure separation process
- aids control over the excess of cement
It is YOUR choice now!
When dealing with implant prosthetics, we are faced with a fundamental choice to make.
Do we want to deliver a screw-retained or cement-retained restoration?
There has been along going dispute between advocates of these solutions, and both sides have their sound arguments.
Until now, screw retained crowns and bridges were generally considered the smart and safe choice. On the other hand, the cemented structures were thought of as easier but more risky due to problems with their removal and difficulties with management of cement excess.
"CALM was developed for you to have a real choice. This makes you clinically free" Sebastian Stępniewski, inventor
Dependable retrievability
If, for whatever reason, we chose to use cemented structures, we were faced with major dificulties in case of a need for it’s removal. CALM is designed to make separation of prosthesis and abutment easy.
Cement excess control
Another major concern associated with cemented prostheses was the excess cement being forcibly pushed into the periimplant tissues during cementation. CALM significantly reduces the risk of periimplant cementitis by acting as a pressure release valve.
Money
it requires minimal-to-none financial investment.
Workflow
it does not interfere with your workflow
Time
it does not consume your precious time
Win-win
it benefits both you and your patient
Why cemented?
We gave up all the advantages of cemented structures because the risks have been to high.
However, as clinicians using screw-retained restorations, we are forced to place implants in positions that favour screw-retained restorations, which can be in contrary to a position dictated by the bone. Consequently we need to introduce more advanced surgical procedures i.e. bone grafting. From prosthetic point of view, we often need to use multi-unit abutments to ensure passive fit of prostheses or angulated screw channels for off-angle implants.
But now, that we finally have a choice, let’s remind ourselfs about benefits of cemented structures.
Passive fit
final passivation process taking place directly in patients mouth (due to the cement acting as a buffer – compensating for manufacturing inaccuracies).
This has great clinical significance especially in case of splinting multiple implants – i.e. bridge, promoting passive fit (especially considering Morse cone/abutment sinking phenomenon).
Superior esthetics
no need for the screw access opening in a visible area of the prosthesis.
No more problems with straight – line screw access, especially in upper frontal area.
Control over occlusion
occlusal contacts and guiding surfaces can be fully developed by a technician in the laboratory.
We do not have to rely on the composite filling of the screw access to bear occlussal and articulatory loads.
Structural integrity
the screw access opening no longer undermines crown’s cusps.
No more dealing with poor composite-porcelain adhesion causing high failure rate of the filling closing the screw channel.
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