Posted 1323 days ago
Mike Skramstad, DDS
Sponsored by Dentspple Sirona
This patient presented an ECA tooth that previously had a PFM crown. That crown fractured and tired part of the structure of the teeth with it.
Preoperative tooth #14
There was no present decomposition, excellent oral hygiene and sufficient dental structure to make a new accumulation and crown for this patient
As there was no present enamel, the tooth was already prepared for a conventional crown, and we needed to maximize the resistance form, a complete coverage circumstance crown was chosen. Katana Stml was the zone that we planned to use the rest of the arch was restored with IPS E.Max CAD and we wanted to match translucidity as close as possible.
All of preparation #14
As we had an extra time assigned for this patient (1 hour and 40 minutes), we also decided to use the extra -fine circumcase milling for this case. In addition to the CS of 2.5 CS Bur and the 1.0 CS finishinger, there is a narrow.
After anesthetizing the patient with 4% articin, the shadow was tasks for restoration. It was determined that we would use an A2 Katana Stml block. Once the shadow was tasks, the block information was entered in the first and the tactile process began.
After starting the tactile process, the patient information and administration phase was completed (designating Katana Stml’s freshness for restoration).
After an accumulation of union was completed, a complete coverage restoration was prepared with the appropriation and retention form for a cementable circumstination restoration. We prepare to the gum line with a modified shoulder of 1.0 mm (winter shoulder) and reduce occludically in 2.0 mm to ensure that the final restoration had a good anatomy and at least 1.0 mm thick. No retraction cable was used in this case.
After preparing the tooth, the lower jaw, the upper jaw and the oral bite were recorded with the CEREC priority in the acquisition phase.
Image
The models were processed and automargination was evaluated. The CERREC software did an excellent job with marginalization and only minor modifications were necessary.
Car marginalization
The CERREC software gave an excellent initial proposal and only minor adjustments were needed for contours, contact or occlusion.
Proposed design phase
After evaluating the proposal, the restoration was taken to the manufacturing phase and sent to Cerec Primemill. Since the tactile process was previously completed, grinding advanced immediately.
Pretech immediately
In this case, we use extra fine freshness to complete the process. This grinding has substantiality longer than fine or fast strawberry, but the detail is improved very well. The total time of the mill for the restoration of Katana Stml was 26:59. In most cases, extra fine freshness is approaching 19 minutes. As this was such a large restoration, it was longer.
After the extra fine freshness was completed, the restoration withdrew from the swimsuit.
Extra fine katana mill from the factory
Since the anatomy was excellent with extra fine grinding, no additional details were required and only a complete pre -polish in the pre -interpreted state.
Katana Prepolish before the sinter
The EF milling definitely reduced the amount of time necessary in the work of Presinter. The restoration was automatically transferred to Cerec Speedfire and the sintering was completed in 18 minutes.
After the sintering, the functional surfaces were polished using brass dialite wheels and then stained and stretched in the Cerec Speedfire oven.
Final and glazed stain
After the glazing and cleaning of the restoration, Cerec Zirconia was cested conventionally using resin modified glass ionomer.
FINE FINE FINAL RESTORATION KATANA STML #14
Total treatment time for this restoration can be broken down as follows:
- Anesthesia, entering the block information in the first process, before touch and information in the case of the patient and the case: 6 minutes
- Preparation of tooth and fabric management: 9 minutes
- Images and Restoration Design: 4 minutes
- Restoration milling: 26:59
- Eliminate sprue restoration, define anatomy and prepolish: 2 minutes
- Restoration sintering: 18:39
- Restoration cooling: 2 minutes
- POLISHED POLISHING THE SINTERIZATION OF RESTORATION AND THE STAIN/ACRITISIZATION: 5 minutes
- Restoration glazing: 9 minutes
10. Restoration cooling: 2 minutes
11. Cleaning and final cementation of the restoration: 5 minutes
Total Treatment Time: 1 hour 30 minutes
The final restoration fits excellent and did not need post -cementation adjustments. Extra finely milling certainly extended time compared to super fast, even with additional milling time, the total appointment time fell into an acceptable range. The best thing about extra fine freshness is that we have the option of creating additional details if necessary for the case.
The Cererec Primemill not only provides speed to the appointment, but also to versatility in grinding strategies. In this case, we choose additional manufacturing time to create a restoration with beautiful details. This special is useful when bridges are made, since it created beautiful not possible switches with fine or fast grinding.
Whenever necessary, Extra Fast Cerec Primemill grinding can create an anatomy not seen before with conventional manufacturing with MC XL. While this would not represent my daily workflow, the time of the appointment is still in a very acceptable range to produce an exceptional result. The options are the key.