Cuspal movement related to different bonding techniques using etch-and-rinse and self-etch adhesive systems.
OBJECTIVE
To investigate the effects of adhesion technique using different contemporary adhesive systems on the cuspal movement in class II composite restorations in human premolar teeth.


METHODS
Human premolar teeth were prepared with class II cavities and then restored with composite and etch-and-rinse (Adper Scotchbond Multi Purpose and Adper Single Bond) or self-etch (Clearfil SE Bond and Clearfil S3 Bond) adhesive systems under different bonding techniques (total bonding and selective bonding). The influence of an intermediate layer of flowable composite was also evaluated. The cuspal distance was measured before and after the restorative procedure, and the difference was recorded as cuspal movement. The data were submitted to ANOVA test and Tukey's post hoc comparison procedure test (alpha=0.05).


RESULTS
For all adhesive systems, the teeth restored with selective bonding technique showed lower values of cuspal movement and the use of an intermediary layer of flowable composite did not show any influence on the cuspal movement.


CONCLUSIONS
Both the adhesive techniques tested were not able to prevent the cuspal movement. However, selectively bonded class II composite restorations demonstrated lower values of cuspal movement comparing with total bonding technique, and the use of an intermediate layer of flowable composite did not diminish the values of cuspal movement.
Campos
Edson Alves
EA
Positivo University.
Andrade
Marcelo Ferrarezi
MF
Porto-Neto
Sizenando Toledo
ST
Campos
Lucas Arrais
LA
Saad
José Roberto Cury
JR
Deliberador
Tatiana Miranda
TM
Oliveira-Júnior
Osmir Batista
OB