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Updated: Sep 6, 2025

Detection and Removal of Tooth-Colored Composite Resin Using the Fluorescence-Aided Identification Technique

Detection and Removal of Tooth-Colored Composite Resin Using the Fluorescence-Aided Identification Technique

Published on: July 27, 2022

Bur Choice When Removing Zirconia Restorations.

Francis L Keeling¹, Robert M Taft^1,2, Stephan J Haney¹

¹Department of Prosthodontics, UT Health San Antonio, San Antonio, TX.

Journal of Prosthodontics : Official Journal of the American College of Prosthodontists

|June 30, 2022

Summary

This summary is machine-generated.

A single-use general-purpose bur demonstrated superior cutting efficiency for zirconia restoration removal compared to multiple-use burs. This finding suggests single-use burs are a cost-effective and efficient option for dental professionals.

Keywords:

CAD-CAM Single use ceramic crown removal cutting efficiency drill high-strength ceramics implant prosthetics multiple use prostheses sectioning

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Multi-material Ceramic-Based Components – Additive Manufacturing of Black-and-white Zirconia Components by Thermoplastic 3D-Printing (CerAM - T3DP)

Multi-material Ceramic-Based Components – Additive Manufacturing of Black-and-white Zirconia Components by Thermoplastic 3D-Printing (CerAM - T3DP)

Published on: January 7, 2019

Area of Science:

Dental Materials Science
Biomaterials Engineering
Restorative Dentistry

Background:

Zirconia restorations present challenges for removal due to their high strength.
Iatrogenic complications can arise from inefficient burs during zirconia removal.
Limited research exists on the comparative cutting efficiency of burs for zirconia.

Purpose of the Study:

To evaluate the cutting efficiency of a specialized bur against general-purpose burs for zirconia removal.
To compare the performance of single-use and multiple-use burs on a high-strength zirconia substrate.

Main Methods:

Four burs were tested: one specialized multiple-use bur (Komet 4ZR), one single-use general-purpose bur (Piranha 837.012), and two multiple-use general-purpose burs (Brassler 6837.31.012C, Komet 6837.314.012).
Cutting efficiency was measured by the time taken to make serial 2 mm cuts in zirconia blocks.
Burs were tested until a 50% loss of initial cutting efficiency was observed, under reproducible conditions using a custom rig.

Main Results:

A statistically significant difference in cutting efficiency was observed among the bur types (p <2.2 × 10^-16).
The single-use general-purpose bur (Piranha 837.012) exhibited the highest cutting efficiency across all cut numbers.
All burs showed decreased performance with increased use, though the rate of deterioration varied without statistical significance.

Conclusions:

Single-use general-purpose burs are significantly more efficient for removing zirconia restorations than multiple-use burs.
The Piranha 837.012 coarse bur demonstrated superior cutting efficiency on Cerec Zirconia Mono L compared to tested multiple-use burs.
Single-use burs offer a cost-effective, sterilization-free alternative and should be considered for zirconia restoration removal.