Implants (Crown & Bridge)
Implants are an increasingly popular alternative to removable partials. The Mayans are credited with the earliest known example of endosseous implants. While excavating Mayan burial sites in Honduras in 1931, archaeologists found a mandibular fragment, dating to approximately 600 AD. This mandible, belonging to a woman in her twenties, had three tooth-shaped pieces of shell placed into the sockets of her missing lower incisors. For forty years, archaeologists believed that the shells were placed after death, in a manner also observed in the ancient Egyptians. However, in 1970, a Brazilian professor named Amadeo Bobbio re-examined the mandible and, after taking a series of radiographs, noted compact bone formation around two of the implants. This discovery led to the conclusion that the implants were placed during the woman’s life, and not post-mortem.
We offer a full selection of implant options to suit the needs of your patients. Choose from patient-specific custom milled abutments, screw retained crown and bridge, or stock abutments.
Patient Specific Custom Milled Abutments
We have chosen Atlantis™ abutments for our patient specific, custom milled abutments. They are available for all major implant systems, including Astra Tech, Biomet 3i, Nobel Biocare, and Straumann, and are digitally designed with the ideal buccal-lingual, mesial-distal, and cervical-incisal dimensions based on the surrounding dentition and opposing occlusion. Atlantis VAD™ (Virtual Abutment Design) is a patented process using 3D optimized scanning to generate an exact virtual image of the upper and lower implant-level models. It enables patient-specific solutions for single, multiple, and full arch restorations. The scanned image allows each Atlantis™ abutment to be individually designed for the specific space it will fit and in relation to the surrounding teeth. Using the Atlantis VAD™ (Virtual Abutment Design) software, Astra Tech designs the abutments from the final tooth shape, which is a significant advantage in achieving a more natural, esthetic result. The software analyzes the specifications we provide, such as details which enable us to make the final restoration according to the doctor’s preferences for occlusal and interproximal contacts, and integrates them into the abutment design. Atlantis™ abutments are available in titanium, gold-shaded titanium (Atlantis GoldHue™), or zirconia. Each abutment is precision-machined from a solid blank of Grade 5 titanium alloy or zirconia.
Atlantis™ abutment in titanium
Atlantis™ abutments are among the very first CAD/CAM titanium abutments to be anatomically designed and produced for each specific patient and indication. The excellent design means there is no need for hand-grinding by a technician or a clinician. The abutments are milled from titanium alloy blanks.
Atlantis GoldHue™ abutment
The Atlantis GoldHue™ abutment has the same features and benefits as the Atlantis™ abutment in titanium. However, it has a thin coating of titanium nitride, which gives it a warm gold-shaded color. This is an advantage in esthetically challenging cases with thin soft tissue or when using all-ceramic crowns.
Atlantis™ abutment in zirconia – white and shaded
Made of Y TZP (yttria-stabilized tetragonal zirconia polycrystals), the zirconia abutments are milled from a solid zirconia blank for unmatched strength and durability, color consistency, excellent biocompatibility and reduced plaque build-up in comparison to titanium. They are available in both white and shaded. The shaded zirconia material is available in four shades, of which we, the laboratory, would choose the one that most closely matches the final restoration shade.
Screw Retained Implant Crown & Bridge
When clearance does not allow enough retention for a cement retained implant restoration, or the Doctor requires retrievability, a screw retained crown or bridge implant restoration can be made.
A PFM screw retained restoration requires the use of a UCLA/castable abutment, on which the plastic sleeve is adjusted and then waxed upon by our technicians. The abutment is waxed to include the ideal crown (or bridge) metal framework design to properly support the porcelain. Once waxed as desired, the abutment is cast, then opaqued and stacked with porcelain like a standard PFM.
An all ceramic screw retained restoration requires the use of a Titanium base designed for hybrid abutments.The crown (or bridge) is made using either full zirconia or layered zirconia, then cemented by the laboratory to the titanium base.
When implant placement allows and the Doctor instructs for it, we can fabricate any implant case using stock abutments. We have experience with most brands available on the market. Please call with any specific questions related to your next implant case.
Closed & Open Tray Impression Techniques
Please find the below closed and open tray impression techniques for implants, courtesy of Zimmer Dental. Regarding step 6 of the closed tray technique, you do not need to place the indirect transfers (impression copings) into the impression prior to sending it to us. If you send the transfers separately in a plastic crown box or in a sealed pouch, we will place them inside the impression under our microscopes to ensure accurate and precision placement.