Purpose: The aim of this study was to establish the wear and cutting efficiency of tungsten carbide burs from different manufacturers by performing cutting tests with machinable glass ceramic.
Materials And Methods: Cutting tests were performed with 70 tungsten carbide burs from seven manufacturers: (A) Coltene/Whaledent, (B) CEI, (C) Meisinger, (D) Axis, (E) Komet, (F) Kerr, (G) Edenta. All groups were examined under scanning electron microscope (SEM) before and after the cutting efficiency test for similarities and differences. A specially designed cutting device was used. An electric handpiece was operated at 200,000 rpm with a 120 ml/min coolant water supply rate. The burs were tested under a 165 g constant load using 3 mm wide Macor ceramic as substrate. For each bur the cutting procedure involved a total of five cuts of 3 minutes on every cut, with a total cutting time for each bur of 15 minutes. Data were analyzed using one-way ANOVA at 95.0% confidence level.
Results: Significant differences (p < 0.05) were found in the mean cutting rates of the different groups. Groups A and B showed the highest cutting rates. Higher cutting rates were associated with a longer bur lifespan. SEM photomicrographs of the burs and substrates revealed significant changes on the surfaces after the cutting process.
Conclusions: The morphology characteristics of tungsten carbide burs are related to their effectiveness. The group that presented the worst working life also showed substantial wear on its surface according to the results of SEM.
Download full-text PDF |
Source |
---|---|
http://dx.doi.org/10.1111/jopr.12017 | DOI Listing |
Clin Oral Investig
January 2025
Faculty of Dentistry, Department of Orthodontics , Hacettepe University, Sihhiye, Ankara, 06100, Turkey.
Introduction: To evaluate topographic changes of enamel surface in 3-dimensional after different debonding methods of aligner attachments formed with 2 different composite resins.
Methods: Vertical rectangular attachments were created on 88 premolar teeth and divided into two composite resin groups (Group 1:flowable, Group 2:packable) (N = 44). These were then divided into two subgroups (N = 22) using different debonding methods.
Med Sci Monit
January 2025
Department of Preventive Dental Sciences, College of Dentistry, Jazan University, Jazan, Saudi Arabia.
BACKGROUND Dental caries removal is conventionally done using carbide burs, but non-metallic polymer burs have recently been developed with the aim of being more selective and causing less pain. The objective of the study is to evaluate and compare the effectiveness of caries removal, time taken, and patient compliance during restorations using smart bur and carbide burs in pediatric patients. MATERIAL AND METHODS A clinical study was designed and conducted at the Pedodontics Outpatient Department, with a focus on 40 children between 6 and 12 years old, who were split into 2 groups consisting of 20 children each: group 1, using a carbide conventional rotary bur, and group 2, using a smart bur.
View Article and Find Full Text PDFPurpose: To assess the influence of operator, tool, dental loupes, and tooth position on enamel loss and composite remnants after removal of composite attachments (CA) for orthodontic clear aligners. Procedure duration was also analyzed.
Materials And Methods: Eight maxillary resin dental arches with four natural teeth were placed in the right posterior sector in dental simulators, and CA was realized.
J Maxillofac Oral Surg
December 2024
Present Address: Department of Dental and Oral Maxillofacial Surgery, LHMC and Associated SSK and KSC Hospital, New Delhi, India.
Medical device separation or breakage is not an uncommon incident in routine maxillofacial surgery. The maxillofacial surgical procedures utilize various devices like piezosurgery tips, tungsten carbide burs, chisels and elevators. Instrument breakage or separation may be attributed to substandard grade, overused blunt instruments, repeated autoclaving, improper force application and overheating of instruments.
View Article and Find Full Text PDFJ Funct Biomater
October 2024
Division of Restorative Dentistry, Periodontology and Prosthodontics, Dental Medicine and Oral Health, Medical University of Graz, 8010 Graz, Austria.
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!