PDF Download - Glidewell Dental Labs

More documents

Recommendations

Info

Lab Corner: Accurately Seating Inclusive® Custom Abutments Using an Acrylic Jig Go online for in-depth content by Dzevad Ceranic, CDT In processing restorations for more than 100,000 implant cases, the Implant department at Glidewell Laboratories has accumulated a unique understanding of the industry as a whole, observing everything from shifting trends, to emerging techniques, to common difficulties experienced by practicing clinicians. In this column, we endeavor to share some of the insights we have obtained, in hopes of improving the quality and efficiency of cases everywhere. Among the most popular products in implant dentistry today are CAD/CAM custom abutments. An investment in cutting-edge digital technology and state-of-the-art milling equipment here at Glidewell Laboratories enables us to efficiently and precisely design and mill our own Inclusive ® Custom Implant Abutments. In our experience, custom abutments are superior in almost every way to stock, off-the-shelf abutments. After all, a restoration is only as good as the foundation on which it is placed. And if that foundation is less than ideal in terms of size, shape, angulation or tissue contour, the success of that restoration could be compromised. Inclusive Custom Implant Abutments are available in three varieties: Titanium, All-Zirconia or Zirconia with Titanium Base. Titanium is most often the choice for posterior restorations because the popular perception among dentists is that this metal alloy must be stronger than zirconia. Our testing data suggests that this may not necessarily be true, in that a properly designed zirconia connection has been shown to tolerate greater loads than a titanium connection. The traditional opinion persists, it seems, due to the fundamental nature of a metal, which deforms under stress, versus a ceramic, which fractures. Regardless, the most widely accepted advantage of a zirconia abutment is its improved esthetics. Having a tooth-colored foundation, rather than a metal one, allows the lab technician to increase the translucency of the crown or bridge. It also eliminates the risk of the gray color of the metal shining through thin soft tissue. For this reason, zirconia abutments are more often used in the esthetic region (Fig. 1). This brings us to the question of which type of zirconia abutment — All-Zirconia or Zirconia with Titanium Base — should be used. Considerations here are two-fold. One is the length of the abutment connection (the post-like section of the abutment that engages into the implant). Zirconia connections are designed to be short for improved strength — superior even to the strength of a titanium connection* — but this shortened length can sometimes present a challenge in terms of verifying complete seating of the abutment onto the implant. Titanium connections are longer (Fig. 2), making them easier to seat, assuming adequate vertical clearance. The second consideration, however, goes back to the difference in esthetics. With a titanium base, there remains the small risk of the appearance of metal showing through around the base of the abutment. With an all-zirconia abutment, this potential drawback is eliminated. *Editor’s note: For more on the comparative strength of zirconia and titanium connections, see article on optimizing the design of zirconia implant abutments, page 21. 28 – www.inclusivemagazine.com –
Figure 1: Graph depicting usage of custom abutment type by tooth number at Glidewell Laboratories Figure 2: A visual comparison of titanium and zirconia abutment connections – Lab Corner: Accurately Seating Inclusive Custom Abutments Using an Acrylic Jig 29
Page 1 and 2: Inclusive® Restorative Driven Impl
Page 3: Contents 6 15 From Intraoral Scan t
Page 6 and 7: Contributors ■ Bradley C. Bockhor
Page 8 and 9: From Intraoral Scan to Final Custom
Page 10 and 11: Figure 4: Healing abutments at six
Page 12 and 13: Figure 15: iTero virtual scan (Alig
Page 14 and 15: Figure 25: 4-unit BruxZir Solid Zir
Page 17 and 18: Implant Q&A: An Interview with Dr.
Page 19 and 20: Not only are we maintaining the bon
Page 21: BB: If you go that route — four i
Page 24 and 25: For proper prosthetic function, zir
Page 26 and 27: On the abutment, there were three a
Page 28: Finite element analysis (FEA) provi
Page 33 and 34: Clinical Delivery The following pro
Page 35: Delivery of a Screw-Retained BruxZi
Page 39 and 40: Figure 1: Preoperative digital trea
Page 41 and 42: Figure 8: Inclusive Mini Implant Im
Page 43 and 44: Figure 16: Wax rim delivered on cas
Page 45 and 46: Figure 26: Articulated model with b
Page 47 and 48: Implant-retained overdentures can o
Page 49 and 50: Figure 2: Sagittal MPR view with ma
Page 52 and 53: Understanding Zirconia Crown Esthet
Page 54 and 55: Spectrophotometry A spectrophotomet
Page 56 and 57: The key to increasing light transmi
Page 58: Inclusive ® Image Contest: Name Th

PDF Download - Glidewell Dental Labs

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?