title: Influence of handpiece maintenance sprays on resin bonding to dentin.
abstract: OBJECTIVE
  To investigate the influence of maintenance spray on resin bonding to dentin.
  
  
  METHODS
  The crown of extracted, caries-free human molars was transversally sectioned with a model trimmer to prepare the dentin surfaces from mid-coronal sound dentin, and then uniformly abraded with #600 silicon carbide paper. The dentin surfaces were randomly divided into three groups: oil-free spray group where maintenance cleaner for air bearing handpieces was sprayed onto the dentin surface for 1 s and rinsed with water spray for 30 s; oil-containing spray group where maintenance cleaner for micro motor handpieces was sprayed onto the dentin surface for 1 s and rinsed with water spray for 30 s; and control group where the surface was rinsed with water spray for 30 s and then air-dried. These surfaces were then bonded with Clearfil SE Bond (Kuraray Medical), and resin composite (Clearfil AP-X, Kuraray Medical) build-up crowns were incrementally constructed on the bonded surfaces. After storage for 24 h in 37°C water, the bonded teeth were sectioned into hour-glass shaped slices (0.7-mm thick) perpendicular to the bonded surfaces. The specimens were then subjected to microtensile bond strength (μTBS) testing at a crosshead speed of 1.0 mm/min. Data were analyzed with one-way ANOVA and the Tukey-Kramer test.
  
  
  RESULTS
  Maintenance spray-contaminated specimens (oil-free and oil-containing spray groups) showed significantly lower μTBS than control specimens (P < 0.05). However, there was no significant difference between the spray-contaminated groups (P > 0.05).
  
  
  CONCLUSIONS
  Maintenance spray significantly reduces the bond strength of Clearfil SE Bond to dentin.
authors: Undergraduate Student, Tokyo Dental College, Chiba, Japan.
authors: Toyotarou
authors: T
authors: Sugawara
authors: Atsushi
authors: A
authors: Kameyama
authors: Akiko
authors: A
authors: Haruyama
authors: Takumi
authors: T
authors: Oishi
authors: Nobuyuki
authors: N
authors: Kukidome
authors: Yasuaki
authors: Y
authors: Takase
authors: Masatake
authors: M
authors: Tsunoda
keywords: contamination; dentinbonding; lubricant; maintenance spray; microtensile bond strength
references: Dent Mater J. 2008 Sep;27(5):660-5
references: 18972781
references: Am J Dent. 1999 Jun;12(3):116-8
references: 10649932
references: Bull Tokyo Dent Coll. 2009 Feb;50(1):13-22
references: 19622875
references: Int Dent J. 2000 Feb;50(1):1-12
references: 10945174
references: Biomaterials. 2007 Sep;28(26):3757-85
references: 17543382
references: Oper Dent. 2005 Jul-Aug;30(4):528-32
references: 16130875
references: J Prosthodont. 1995 Mar;4(1):28-32
references: 7670608
references: J Esthet Dent. 2000;12(3):139-45
references: 11324082
references: J Dent. 1994 Apr;22(2):89-91
references: 8195481
references: Br Dent J. 2005 May 28;198(10):637-40; discussion 627; quiz 648
references: 15920598
references: Oper Dent. 2007 Mar-Apr;32(2):160-5
references: 17427825
references: Dent Mater. 1994 Jul;10(4):236-40
references: 7664990
references: Oper Dent. 2004 Sep-Oct;29(5):554-9
references: 15470878
references: J Adhes Dent. 2006 Feb;8(1):41-5
references: 16536344
references: Am J Dent. 1998 Dec;11(6):281-5
references: 10477979
references: Oper Dent. 2006 Nov-Dec;31(6):660-5
references: 17153973
references: Bull Tokyo Dent Coll. 2002 Aug;43(3):193-7
references: 12455239
references: Quintessence Int. 1998 Sep;29(9):567-72
references: 9807140
references: Dent Mater. 1993 Sep;9(5):295-9
references: 7995480
references: Am J Dent. 2008 Apr;21(2):101-4
references: 18578177
references: Am J Dent. 2001 Dec;14(6):367-72
references: 11949796
references: Eur J Oral Sci. 1995 Oct;103(5):322-6
references: 8521124