This invention relates to a periodontal instrument and curettage method for separating and removing diseased granulation tissue from a periodontal cavity. The instrument is comprised of a periodontal curette affixed to a source of ultrasonic energy that drives the curette in an elliptical motion at an...http://www.google.es/patents/US5577911?utm_source=gb-gplus-sharePatente US5577911 - Ultrasonically driven curette for periodontal curettage
Ultrasonically driven curette for periodontal curettage
