The University of Iowa College of Dentistry and Dental Clinics logoLink to University of Iowa home pageLink to College of Dentistry and Dental Clinics home page

  college of dentistry mission graphic

Oscillating Burs & Instruments

In an examination of the percentage incidence of inadvertent damage to adjacent teeth by dentists, it was found that 89% of adjacent teeth have iatrogenic damage when traditional rotary burs are used for cavity preparations, and that 73% of adjacent teeth surfaces are affected when rotary burs are used for crown preparations. When preparing teeth for fillings or crowns, oscillating instruments/burs offer a more conservative alternative. These burs oscillate at a high frequency, thus removing less tooth structure per unit time, but also have non-cutting “safe-sides” that prevent any damage to the adjacent tooth surfaces even when the bur is in direct contact with the adjacent tooth. When used with the microscope, these burs allow for ideal marginal preparation and for more conservation of healthy tooth structure.