title: Relationships between tissue properties and operational parameters of a dental handpiece during simulated cavity preparation.
abstract: A preliminary study was conducted on the development of an intelligent dental handpiece with functionality to detect subtle changes in mechanical properties of tooth tissue during milling. Such equipment would be able to adopt changes in cutting parameters and make real-time measurements to avoid tooth tissue damage caused by overexertion and overextension of the cutting tool. A modified dental handpiece, instrumented with strain gauges, microphone, displacement sensor, and air pressure sensor, was mounted to a linear movement table and used to mill three to four cavities in >50 bovine teeth. Extracted sound frequency and density were analyzed along with force, air pressure, and displacement for correlations and trends. Experimental results showed a high correlation (coefficient close to 0.7) between the feed force, the rotational frequency, and the averaged gray scale. These results could form the basis of a feedback control system to improve the safety of dental cutting procedures. This article is written in memory of Dr Hongyan Sun, who passed away in 2011 at a young age of 37.
authors.affiliation: The State Key Laboratory of Mechanical Transmission, Chongqing University, Chongqing, China ; Minnesota Dental Research Center for Biomaterials and Biomechanics, School of Dentistry, University of Minnesota, Minneapolis, MN, USA.
authors.forename: Hongyan
authors.initials: H
authors.lastname: Sun
authors.forename: Andrew
authors.initials: A
authors.lastname: Lau
authors.forename: Young C
authors.initials: YC
authors.lastname: Heo
authors.forename: Lianshan
authors.initials: L
authors.lastname: Lin
authors.forename: Ralph
authors.initials: R
authors.lastname: Delong
authors.forename: Alex
authors.initials: A
authors.lastname: Fok
keywords: Dental handpiece; cavity preparation; correlation coefficient; feed force; rotational frequency
references.citation: Br Dent J. 1983 Jan 22;154(2):42-5
references.pmid: 6572060
references.citation: Dent Mater. 2000 Nov;16(6):420-5
references.pmid: 10967191
references.citation: Proc Inst Mech Eng H. 1998;212(3):209-21
references.pmid: 9695640
references.citation: Proc Inst Mech Eng H. 2000;214(4):385-99
references.pmid: 10997059
references.citation: J Dent Res. 1951 Dec;30(6):854-69
references.pmid: 14897981
references.citation: J Dent. 2008 Jul;36(7):488-93
references.pmid: 18468763
references.citation: J Am Dent Assoc. 1987 May;114(5):648-50
references.pmid: 3474268
references.citation: Oper Dent. 1979 Summer;4(3):124-31
references.pmid: 398978
references.citation: J Dent. 1999 Nov;27(8):573-86
references.pmid: 10528975
references.citation: Br Dent J. 1989 Apr 22;166(8):287-9
references.pmid: 2719888
references.citation: Br Dent J. 2000 Jun 24;188(12):680-6
references.pmid: 11022384
references.citation: Arch Oral Biol. 2001 Feb;46(2):173-83
references.pmid: 11163325
references.citation: Br Dent J. 1951 May 15;90(10):251-9
references.pmid: 14830680
references.citation: Arch Oral Biol. 2002 Apr;47(4):281-91
references.pmid: 11922871
references.citation: Dent Mater J. 1990 Dec;9(2):173-80
references.pmid: 1966019
references.citation: J Dent. 1980 Jun;8(2):135-43
references.pmid: 6930387
references.citation: Dent Mater J. 1989 Jun;8(1):26-34
references.pmid: 2700689
references.citation: J Am Dent Assoc. 1981 Oct;103(4):584-7
references.pmid: 7026643
references.citation: Nat Mater. 2005 Mar;4(3):229-32
references.pmid: 15711554
references.citation: J Oral Rehabil. 1990 Sep;17(5):461-72
references.pmid: 2231164