ANSWERS

What is a PMMA try-in for full arch?

A PMMA try-in is a milled polymethyl methacrylate prototype of the final full-arch prosthesis, used to verify fit, occlusion, phonetics, and esthetics before the definitive zirconia or hybrid is fabricated. The patient wears it intraorally, the clinician confirms vertical dimension and midline, and the lab uses the...

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What the PMMA stage actually does in a full-arch workflow

A PMMA try-in sits between the digital design approval and the final prosthesis mill. The lab takes the approved CAD design, mills it from a solid PMMA puck (the same polymer used in long-term provisionals), and ships it to the practice for an intraoral try-in. The clinician seats it on the multi-unit abutments, checks passive fit, verifies centric occlusion, confirms the patient can phonate the F and S sounds correctly, and reviews esthetics with the patient in a mirror. Adjustments get marked, the try-in goes back to the lab, and the design file is updated before the definitive zirconia or titanium-bar hybrid is milled.

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How long does the PMMA try-in stage add to a full-arch case timeline?

At Dani Dental the PMMA mill and ship adds roughly 5 to 7 business days to the total case timeline, depending on shipping distance and whether revisions are needed after the intraoral try-in. The mill itself takes about 2 to 3 hours on the 5-axis. Most cases approve the PMMA on the first try-in appointment, which means one revision cycle at most before the definitive prosthesis is cut from zirconia or processed as a titanium-bar hybrid.

Can a PMMA try-in be converted into a long-term provisional?

Yes. PMMA is the same polymer used in long-term provisionals, so an approved try-in can be retained, polished, and seated as the provisional while the definitive prosthesis is fabricated. This is useful on cases where the patient is traveling between appointments or where the clinician wants the patient to wear-test the design for a few weeks before committing to the final zirconia. Dani Dental can polish and finish the PMMA for provisional use on request, noted on the case submission.

What gets verified at the PMMA appointment that cannot be verified digitally?

Phonetics, lip support, tissue contour against the prosthesis intaglio, and the patient's subjective esthetic approval. Digital design verifies passive fit, occlusal contacts, and emergence in software, but the patient saying the F and S sounds correctly and seeing the smile line in a mirror is the verification that only happens intraorally. Roughly 15% of Dani Dental's full-arch cases come back from PMMA with at least one midline or incisal-edge adjustment that the patient requested at the mirror.

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This answer is one piece of a larger workflow. The pillar page covers materials, turnaround, and how we build the case to your specification.

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