All-Ceramic Crown: Shouldered Abutment

Laboratory Technique: Implant Level Impression

1. Assemble the appropriate implant analog and impression post prior to inserting them as a unit into the impression.

2. Inject soft tissue material (e.g. Soft Tissue Moulage by Kerr) around the impression post and implant analog up to the connection of each part. Pour a stone model and articulate the casts.

3. Select the appropriate size abutment. The shouldered abutment should support the papillae, but not encroach upon them. The shoulder of the abutment should sit approximately 1.0 to 1.5mm below the gingival crest.

Follow Steps 5 to 11 of the next section for selection of the aluminum oxide sleeve and fabrication of the all-ceramic crown.

Keys to Success

• Carefully confirm complete seating of impression components.
• Implant level transfer impressions will provide more flexibility in the selection and modification of the abutment and sleeve.
• Often a narrower or shorter abutment will be easier to restore than a wider or angled abutment.

Stealth Shouldered Abutment