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BruxZir® NOW Case of the Week: Episode 151

December 18, 2015
Author
image
Siamak Abai, DDS, MMedSc

My clinical challenge in this Case of the Week was a patient’s request to have a crown replaced in a timely manner so that we could complete treatment in one visit. This desire presented an ideal situation to clinically test a new version of BruxZir® Solid Zirconia. The available formulations of BruxZir Solid Zirconia have already proven themselves to be extremely strong materials and are utilized by clinicians across the country. Recently, we have been developing a product called BruxZir NOW, and with this chairside, fully sintered zirconia restoration, I can provide the patient with an extremely strong crown in a very short amount of time.

Recently, we have been developing a product called BruxZir NOW, and with this chairside, fully sintered zirconia restoration, I can provide the patient with an extremely strong crown in a very short amount of time.
Figure 1a
Figure 1b

Figures 1a, 1b: Occlusal and buccal views of existing fractured restoration, a lithium disilicate crown on tooth #30.

Figure 2

Figure 2: The patient was anesthetized, and the existing crown was sectioned and removed.

Figure 3

Figure 3: Immediately after removal, the tooth was prepared to receive a chairside-milled restoration.

Figure 4

Figure 4: The preparation consisted of chamfer margins with a minimum of 1 mm of axial reduction and 1.5 mm of occlusal reduction.

Figure 5

Figure 5: A two-cord technique was utilized prior to the digital impression.

Figure 6a
Figure 6b

Figures 6a, 6b: The intraoral digital impression was captured using the 3M™ True Definition Scanner (3M™ ESPE™; St. Paul, Minn.). The preparation, opposing and bite registration were captured in 56 seconds.

Figure 7a
Figure 7b

Figures 7a, 7b: Utilizing the digital information with the FastScan™ software (IOS Technologies, Inc.; San Diego, Calif.), a virtual crown was fabricated. The intuitive nature of the software, with a built-in library of teeth, allows the clinician to efficiently design a final restoration.

Figure 8

Figure 8: The final proposal for the restoration is approved, and the STL file is sent to the TS150™ chairside mill (IOS Technologies) for fabrication of the final restoration.

Figure 9a
Figure 9b

Figures 9a, 9b: Once the crown is ready to be milled, the TS150 chairside mill is loaded with the BruxZir NOW block and primed for milling.

Figure 10a
Figure 10b

Figures 10a, 10b: The milling time for this restoration was 45 minutes. The clinician has the option of post-milling staining; however, for less esthetic cases, polishing will suffice prior to delivery.

Figure 11

Figure 11: A final try-in prior to cementation allowed for any occlusal adjustments or modifications. A radiograph was also taken to ensure proper margins.

Figure 12

Figure 12: The crown was delivered with resin cement. The patient received the dual advantage of BruxZir crown strength with the efficiency and convenience of chairside milling.

Conclusion

With BruxZir NOW, you can pare down your chair time to a single appointment for a restoration, while still providing the established brawn of BruxZir. This chairside, fully sintered zirconia restorative material joins an array of lab-verified innovations from our Research & Development department, where a team of 75 includes material scientists, technicians, clinicians and experts with Ph.D.s. The R&D team has been hard at work making certain the chairside-milled BruxZir NOW is clinically sound, and you can learn more about their advancements at bruxzir.com.