Assessing the cutting efficiency of different burs on zirconia substrate

Peters, Ove A.; Du, Daniel; Ho, Mei Ying; Chu, Rick; Moule, Alex J.

doi:10.1111/aej.12350

Cited by 10 publications

(8 citation statements)

References 29 publications

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“…Peters et al 22 studied the CE of burs in cutting zirconia, but they compared the performance of tungsten carbide burs to diamond burs. The diamond burs performed better than the tungsten carbide burs.…”

Section: Discussionmentioning

confidence: 99%

“…There are very limited studies assessing the performance of diamond burs cutting zirconia. Peters et al 22 reported a study comparing the CE of a multiple‐use bur marketed specifically for cutting zirconia with a multiple‐use conventional diamond bur. There was no statistically significant difference in the CE of the conventional diamond bur and the special zirconia cutting bur in the first 5 minutes of cutting.…”

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confidence: 99%

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Bur Choice When Removing Zirconia Restorations

Keeling

Taft

Haney

2022

Journal of Prosthodontics

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Purpose Removal of zirconia restorations can be challenging and time consuming, requiring dental burs with optimal cutting efficiency to minimize iatrogenic complications. Yet, there are very few burs marketed for this purpose and little evidence of their comparative benefit. This study evaluated one specialized bur and compared its cutting efficiency with three general‐purpose burs (one single use and two multiple uses). Materials and methods This study was designed to assess the cutting efficiency of 4 burs on a high‐strength zirconia substrate. One of these burs is a multiple‐use bur marketed for high‐strength ceramics (Komet 4ZR), another is a single‐use general‐purpose bur (Piranha 837.012 coarse), and two are multiple‐use general‐purpose burs (Brassler 6837.31.012C coarse and Komet 6837.314.012 coarse). The cutting efficiency of each bur was determined by measuring the time taken to perform serial 2 mm cuts into a block of zirconia. Ten burs in each group were tested with repeated cuts until the time taken for a 2 mm cut was twice that of the first 2 mm cut (50% loss of efficiency). This study was performed under reproducible conditions using a custom‐designed and fabricated rig assembly. Results The results demonstrated a statistically significant difference in the cutting efficiency between bur types. The single‐use general‐purpose bur (Piranha 837.012) was the most efficient for all cut numbers p <2.2 × 10–16. The performance of all burs decreased with each cut, with cutting efficiency dependent on time point/cut number (p = 0.02). The rate of deterioration varied between burs, but this difference was not sufficient to be statistically significant. Conclusions This study demonstrated that a single‐use bur is more efficient than 3 multiple‐use burs. The cutting efficiency of a single‐use general‐purpose bur (Piranha 837.012 coarse) on Cerec Zirconia Mono L was statistically superior to that of multiple patient use burs in this study, including one marketed for use on high‐strength ceramics. Because single‐use burs are comparatively inexpensive and require no sterilization, they should be strongly considered for the removal of zirconia restorations.

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Section: Discussionmentioning

confidence: 99%

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confidence: 99%

Bur Choice When Removing Zirconia Restorations

Keeling

Taft

Haney

2022

Journal of Prosthodontics

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“…This may have an impact on the misfit discrepancies among the study groups. Furthermore, it is suggested that the cutting efficiency, sequence, and duration of use of burs can influence the properties of ceramics including its surface [37][38][39] . The burs were continuously changed on the manufacturers' recommendations, which differed between systems.…”

Section: Discussionmentioning

confidence: 99%

Influence of milling systems and marginal configurations on the fit of yttrium stabilized tetragonal zirconia polycrystals (Y-TZP)’ copings

Al‐Aali

Bin-Shuwaish

Alhenaki

et al. 2020

Journal of Applied Biomaterials & Functional Materials

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Objective: The aim of this study was to evaluate marginal fit of yttrium tetragonal zirconia polycrystals (Y-TZP)’ copings with different finish line designs fabricated with various digital scanners and milling systems. Methods: Three model plastic teeth were prepared with three finish line designs: Design-1, continuous chamfer; Design-2, chamfer with shallow depression; Design-3, chamfer with deep depression. The “master models” were replicated using elastomeric polyvinyl siloxane impression material and poured in type IV stone generating 90 dies, 30 dies for each design. Dies were scanned and copings were milled utilizing three digital scanners and computer-aided design/computer-aided manufacturing (CAD/CAM) systems: System-1, InEos Red Scan (Sirona Dental Systems, Germany), Vitablocks® Mark II (VITA, Germany) copings milled by Cerec® inLab (Sirona Dental Systems, Germany); System-2, Cerec® AC Connect with BlueCam (Sirona Dental Systems, Germany), Vitablocks® Mark II (VITA, Germany) copings milled by Cerec® inLab (Sirona Dental Systems, Germany); and System-3, NobleProcera™ Optical Scanner (NobleBiocare™), procera zirconia coping milled by a Noble Procera™ milling machine (NobleBiocare™). Copings were seated on their respective “master models” and secured with uniform force. Eight measurements per coping were performed at pre-established points, with a metallurgical microscope (Zeiss, Germany) connected to a high precision digital video-micrometer (Javelin JV6000, California, USA) at 200 × magnification. Results: The tested systems demonstrated marginal gaps ranging from 12.4 to 26.6 µm. Results for marginal fit of milled copings fabricated using three systems with different finish line designs differed significantly ( p < 0.05). Procera zirconia copings scanned and milled with NobleProcera™ exhibited significantly lower marginal gaps compared to other specimen groups. However, InEos Red Scan/Vitablocks® Mark II/Cerec® inLab showed maximum marginal gaps among the study specimens. Conclusions: CAD-CAM manufactured Y-TZP’ copings exhibited marginal gaps ranging from 12.49 to 26.6 µm. The CAD-CAM fabrication system was a significant factor influencing the marginal misfit of Y-TZP’ copings. Margin design exhibited system dependent influence on the marginal misfit. Marginal misfit observed for all systems were within clinically acceptable parameters.

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“…Clinically, the use of implants with a single body requires extreme ability by the professional for a correct three-dimensional positioning without prejudice for subsequent prosthetic manufacture [ 141 ]; technological details that are also being perfected by companies with the manufacture of implants with separate parts [ 142 ]. Finally, corrections in components made with ZrO 2 after the period of osseointegration or cementation are extremely difficult due to their hardness and the possibility of creating cracks with the use of specific burs [ 143 ]. Thus, the use of dental materials derived from zirconia must be carried out with a correct learning curve and planning by the clinical professional.…”

Section: Clinical Benefitsmentioning

confidence: 99%

Oral Tissue Interactions and Cellular Response to Zirconia Implant-Prosthetic Components: A Critical Review

et al. 2021

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Background: Dental components manufactured with zirconia (ZrO2) represent a significant percentage of the implant prosthetic market in dentistry. However, during the last few years, we have observed robust clinical and pre-clinical scientific investigations on zirconia both as a prosthetic and an implantable material. At the same time, we have witnessed consistent technical and manufacturing updates with regards to the applications of zirconia which appear to gradually clarify points which until recently were not well understood. Methods: This critical review evaluated the “state of the art” in relation to applications of this biomaterial in dental components and its interactions with oral tissues. Results: The physico-chemical and structural properties as well as the current surface treatment methodologies for ZrO2 were explored. A critical investigation of the cellular response to this biomaterial was completed and the clinical implications discussed. Finally, surface treatments of ZrO2 demonstrate that excellent osseointegration is possible and provide encouraging prospects for rapid bone adhesion. Furthermore, sophisticated surface treatment techniques and technologies are providing impressive oral soft tissue cell responses thus leading to superior biological seal. Conclusions: Dental devices manufactured from ZrO2 are structurally and chemically stable with biocompatibility levels allowing for safe and long-term function in the oral environment.

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Assessing the cutting efficiency of different burs on zirconia substrate

Cited by 10 publications

References 29 publications

Bur Choice When Removing Zirconia Restorations

Bur Choice When Removing Zirconia Restorations

Influence of milling systems and marginal configurations on the fit of yttrium stabilized tetragonal zirconia polycrystals (Y-TZP)’ copings

Oral Tissue Interactions and Cellular Response to Zirconia Implant-Prosthetic Components: A Critical Review

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