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Volume 29 , Issue 3
May/June 2009
Pages 277-287

Ultrasonic Sulcus Penetration: A New Approach for Full Crown Preparations

Marc Sous, DDS, PhD/Yann Lepetitcorps, PhD/Jean-François Lasserre, DDS, PhD/Ngampis Six, DDS, MSc, PhD

PMID: 19537467
DOI: 10.11607/prd.00.0864

Newly developed ultrasonic diamond-coated tips (UDT) have been created for sulcus penetration and intracrevicular finish line preparation and polishing. One hundred forty-two freshly extracted premolars and molars were employed for a cutting efficiency test. Dentin surface roughness was analyzed with an optical profilometer and a scanning electron microscope. Within a reasonable cutting time, the UDTs possessed sufficient dentin-cutting capacity. The surface roughness of dentin prepared with the UDT can be improved by using a smaller grit size UDT or a smooth tip set at lower power, and the roughness approaches that of dentin prepared with a referenced red diamond bur. A clinical protocol of ultrasonic sulcus penetration with these developed UDTs is proposed. (Int J Periodontics Restorative Dent 2009;29:277–287.)

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