Prefabricated implant abutments don't require CAD/CAM or other special equipment and the components are readily available, allowing practitioners to buy and send them to the laboratory along with the case. Nelson Rego, CDT, AAACD, offers a step-by-step look at using a Straumann® Anatomic IPS e.max pre-fabricated abutment.
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Step 4: Rego measured the soft tissue and, since this is a bone-level implant, chose a Straumann Anatomic IPS e.max abutment with a 3.5-mm gingival cuff height (a 2.0mm gingival cuff height is also available). A cuff height of 3mm or more is often required for placing the margins near the gum line on bone-level implants. Therefore, a 3.5mm abutment equates to a 4.5mm depth for the bone-level implant, with it still being “in the zone.” It’s important to keep the implant abutment margins approximately 1mm subgingival in order to facilitate cement clean up.
Step 8: IPS e.max CAD is lithium disilicate glass ceramic in a soft state that can be milled and, at this stage, exhibits an unusual bluish color. Upon receiving the restoration from the Straumann milling center, Rego carefully fit it on the model and cut back the blue material to create the room necessary for the incisal porcelain.
Step 2:When given the option of a bridge or implant, the patient selected an implant, which was immediately placed. Due to the patient’s exceptional bone quality, the dental team also decided to immediately load a temporary restoration. To ensure the design of the temporary restoration was ideal, Nelson Rego fabricated a waxup. Dr. Ken Hovden placed a prefabricated temporary abutment in the patient’s mouth and then filled the matrix that was created from the waxup with bis-acrylic temporary material. This matrix was then seated in the mouth to create a screw-retained custom temporary. This allowed the patient to “test-drive” the restoration and discuss any features that required modification, and enabled Dr. Hovden to develop the implant gingival architecture immediately upon implant placement.