Restorative Workflow: Grammetry

Overview

The GrammetryTM system is an IOS-based alternative to photogrammetry. Grammetry allows for simple record capture protocol and offers the ability to fabricate physical models (not available through photogrammetry).

The goal of the Grammetry workflow is to capture records for a Printed Try-In.

Prerequisites

Patient must have existing denture or prosthesis

Technology & Materials

Intraoral scanner
One Grammetry kit per arch
PVS wash reline material of choice
If patient has a denture: Healing caps approved for IOS scanning

Photographs

Full-face full-smile
Full-face exaggerated smile
Optional: Full-face profile smile

Workflow Steps for using the Grammetry Workflow for a Printed Try-in


Step	Instructions	Image
1.	Take the following photos with the patient standing up: Full-face full-smile Full-face exaggerated smile Optional: Full-face profile smile
2.	Remove the patient’s denture/prosthesis. Seat the scan bodies passively onto each MUA.
3.	Seat the framework and lute to the scan bodies using acrylic resin (e.g. Stellar).
4.	Once cured, unscrew the scan bodies and remove from the mouth.
5.	Scan the top of the framework extraorally, capturing each of the scan bodies. Tip: Start your scan in the center of the cured luting and work outwards towards the scan bodies.
Important: Steps 6-9 are for dentures only. If your patient has a loaded prosthesis, not a denture, skip steps 6-9 and go directly to step 10.
6.	Seat approved healing caps onto the MUAs. Note: If you are unsure if your healing collars are approved for use with Grammetry, visit our website at www.roedentallab.com/grammetry.
7.	Try in the denture and ensure full seat over the healing collars. Adjust the denture as needed to ensure passive seat.
8.	Perform a PVS wash capturing the detail of all of the healing collars, with the denture in occlusion. Remove the denture.
9.	Capture a 360° extraoral scan of the denture with the IOS.
10.	Scan the tissue and MUAs with your IOS. Nothing should be seated on the MUAs. A PVS impression is also suitable.
11.	Re-seat the denture or prosthesis. Capture the following IOS scans: Denture only: Teeth and labial flange Opposing Bite
12.	Upload all scans to ROE Dental Laboratory. Next, ROE will fabricate or provide in-office printing files for the Printed Try-In. The Printed Try-In is a 3D-printed prototype of the final prosthesis. See page 58 for more details.