This article and videos review the steps for:
- Preparing a wax rim to be scanned
- How to scan a wax rim
Preparing a Wax Rim: Steps Before Scanning
- Use light body or a combination of light body and heavy body to border mold and capture an impression of the patient's edentulous arch. The wax rim serves as the impression tray for border molding.
- Confirm the VDO proposed with the wax rim. Adjust the vertical height as needed before proceeding.
- Make the following carving patterns on the buccal surface of the wax rim to mark:
- The midline
- The high smile line
- The canine lines
- Carve notches into the occlusal surface of the wax rim. This creates space for bite registration material to record an accurate, repeatable bite.
- Create additional markings/carvings (i.e. X's, +'s, etc.) on the occlusal and buccal sides of the wax rim.
- These marks allow the scanner to understand its location when scanning. It also assists in stitching together data.
- These marks also allow us to align the patient's bite once we begin our scans.
Scanning a Wax Rim: 360° Scanning Technique
The scan of a wax rim is complete in three phases. First, you will scan the entire cameo (wax-sided) side of the wax rim. Then, you will scan the entire border. Lastly, you will scan the intaglio surface.
- Extraorally, turn on the scanner over the occlusal surface of the wax rim. Glide the scanner across the entire occlusal surface.
- Proceed to scanning the entire buccal surface of the wax rim after scanning the occlusal surface.
- Proceed to scanning the entire lingual surface of the wax rim.
- To scan the rest of the palatal region, bring the scanner to site #8 and #9. Sweep the scanner back and forth, capturing the palatal region. Continue until reaching the posterior border of the appliance.
- Turn off the scanner. This allows the image to process.
- Turn on the scanner over the buccal surface. Slowly roll the scanner over the border towards the intaglio surface. Perform this rolling motion from buccal-to-intaglio border to capture the entire circumference of the wax rim's border.
- Capture the palatal region of the intaglio surface.