title: Influence of different bonding agents and composite resins on fracture resistance of reattached incisal tooth fragment.
abstract: BACKGROUND
  Reattachment of the fractured tooth fragment should be considered as a conservative treatment and valid alternative to a composite restoration.
  
  
  OBJECTIVE
  This in vitro study was to evaluate the influence of different adhesives and composite resins on fracture resistance of dental fragment reattached to the sectioned incisal edges.
  
  
  METHODS
  120 sound human maxillary central incisors were selected under standard conditions and randomly divided into 3 groups, 12 sound teeth were used as a control group and the remaining teeth were assigned to 3 groups (n=36) and each group into three subgroups (n=12). The incisal third of the samples was sectioned using a diamond disk and the respective fragments were then reattached utilizing different intermediate restorative materials, namely: i) adhesive materials alone (OptiBond S or OptiBond XTR or OptiBond All-in-One; ii) Premise flowable composite and iii) Point 4 composite in the one of the mentioned adhesive interface. After storage for two weeks at 37°C and 100% humidity and then thermocycling; shear bond strength (SBS) was recorded in kilogram force (kgf) by applying a load in the middle incisal third with a Zwick Universal Testing Machine at a cross-head speed of 1 mm/min. Data was analyzed with one-way ANOVA and Tukey HSD (p< 0.05).
  
  
  RESULTS
  The control group had a significantly higher SBS than other groups (p= 0.001); the highest SBS values were obtained using the Premise flowable composite and OptiBond S adhesive (112.44±30.46 MPa); and the lowest with OptiBond All-in-One alone (33.97± 15.63 MPa).
  
  
  CONCLUSIONS
  Although, none of the tested materials provided fracture resistance similar to that found with the intact maxillary central incisors; utilizing the Premise flowable composite and OptiBond S adhesive improved the SBS of the reattached fragment than other materials.
authors.affiliation: Dept. of Restorative Dentistry, School of Dentistry, Shahid Sadoughi University of Medical Sciences, Yazd, Iran.
authors.forename: Ar
authors.initials: A
authors.lastname: Davari
authors.affiliation: Dept. of Restorative Dentistry, School of Dentistry, Rafsanjan University of Medical Sciences, Rafsanjan, Iran.
authors.forename: M
authors.initials: M
authors.lastname: Sadeghi
keywords: Composite resin; Dentin bonding agent; Reattachment technique; Tooth fracture
references.citation: Oper Dent. 2002 Sep-Oct;27(5):528-34
references.pmid: 12216574
references.citation: J Dent. 1999 Sep;27(7):523-30
references.pmid: 10507209
references.citation: Br Dent J. 1997 Feb 22;182(4):129-33
references.pmid: 9061998
references.citation: J Dent Res. 2005 Feb;84(2):118-32
references.pmid: 15668328
references.citation: Endod Dent Traumatol. 1995 Aug;11(4):186-8
references.pmid: 7588343
references.citation: Oper Dent. 2008 Jul-Aug;33(4):426-33
references.pmid: 18666501
references.citation: Eur J Oral Sci. 1999 Feb;107(1):70-3
references.pmid: 10102753
references.citation: Contemp Clin Dent. 2012 Oct;3(4):478-80
references.pmid: 23633814
references.citation: Oper Dent. 2008 Mar-Apr;33(2):155-62
references.pmid: 18435189
references.citation: Quintessence Int. 1995 Oct;26(10):669-81
references.pmid: 8935108
references.citation: J Dent Res. 2001 Jul;80(7):1605-14
references.pmid: 11597019
references.citation: Dent Traumatol. 2011 Feb;27(1):15-8
references.pmid: 21244624
references.citation: Am J Dent. 2001 Dec;14(6):349-54
references.pmid: 11949793
references.citation: Oper Dent. 2002 Nov-Dec;27(6):621-7
references.pmid: 12413229
references.citation: Dent Traumatol. 2006 Feb;22(1):48-52
references.pmid: 16422760
references.citation: Endod Dent Traumatol. 1995 Jun;11(3):129-35
references.pmid: 7641629
references.citation: Biomaterials. 2005 Apr;26(10):1195-204
references.pmid: 15451639
references.citation: Dent Traumatol. 2010 Feb;26(1):9-15
references.pmid: 20089057
references.citation: Quintessence Int. 2003 Feb;34(2):99-107
references.pmid: 12666858
references.citation: Dent Traumatol. 2008 Jun;24(3):283-8
references.pmid: 18489478
references.citation: Acta Odontol Scand. 2002 Oct;60(5):265-70
references.pmid: 12418715
references.citation: Oper Dent. 2004 Mar-Apr;29(2):226-33
references.pmid: 15088736
references.citation: Pract Periodontics Aesthet Dent. 2000 Oct;12(8):751-8; quiz 760
references.pmid: 11404871
references.citation: Endod Dent Traumatol. 1998 Jun;14(3):119-23
references.pmid: 9863420
references.citation: Oper Dent. 2004 May-Jun;29(3):295-300
references.pmid: 15195730
references.citation: Oral Health. 1996 Oct;86(10):33
references.pmid: 9462116
references.citation: Quintessence Int. 2000 Feb;31(2):133-6
references.pmid: 11203915
references.citation: J Esthet Restor Dent. 2007;19(5):240-5; discussion 246
references.pmid: 17877620
references.citation: Pract Proced Aesthet Dent. 2003 Jun;15(5):403-9; quiz 410
references.pmid: 12901070
references.citation: J Oral Rehabil. 2003 Jan;30(1):82-6
references.pmid: 12485389
references.citation: J Adhes Dent. 2008 Feb;10(2):113-7
references.pmid: 18512508
references.citation: Oper Dent. 2002 May-Jun;27(3):248-53
references.pmid: 12022455
references.citation: J Indian Soc Pedod Prev Dent. 2012 Oct-Dec;30(4):310-6
references.pmid: 23514683
references.citation: Endod Dent Traumatol. 1993 Jun;9(3):111-4
references.pmid: 8243342
references.citation: Quintessence Int. 1991 Feb;22(2):81-5
references.pmid: 1829840
references.citation: Dent Mater. 2001 Sep;17(5):430-44
references.pmid: 11445211
references.citation: J Biomed Mater Res A. 2003 Jul 1;66(1):10-20
references.pmid: 12833426
references.citation: Dent Traumatol. 2004 Jun;20(3):157-63
references.pmid: 15144447
references.citation: Endod Dent Traumatol. 1993 Apr;9(2):61-4
references.pmid: 8404697