Influence of surface remodelling using burs on the macro and micro surface morphology of anatomically formed fibre posts.
OBJECTIVE
To evaluate the effect of modifying preformed fibre-reinforced composite (FRC) endodontic posts on their surface morphology and to determine how this procedure affects the integrity of the posts.


CONCLUSIONS
Surfaces of 10 preformed glass-fibre posts (group 1) and carbon-fibre posts (group 2) were compared with those of individually formed glass-fibre posts (group 3). Ten FRC posts were modelled in order to give them a shape as close as possible to the anatomy of oval root canals. Starting from a preformed cylindrical fibre post 2.5 mm in diameter, it was modelled in such a way as to passively occupy the entire post-space length, using a cast previously created as a guide. Microscopic analyses (optical stereomicroscope and scanning electron microscope) of the post surfaces revealed similar features in all three groups. All posts had regular surfaces after cutting with a diamond bur. Smear layer mainly attributable to the cutting procedures covered the cut surface of some specimens. In conclusion, modulation of a fibre post using a diamond-coated bur did not show a loss of integrity of the post. *Because of the importance of micromechanical retention, the surface integrity of fibre posts may be important for adhesion between post and composite resin. *Modification of a fibre post using a diamond-coated bur did not damage the surface integrity of the posts. *Fibre posts can be ground to a different shape without losing their surface integrity, resulting in posts with a surface that is not visibly different from unmodified commercially available fibre posts.
Plotino
G
G
Department of Endodontics, Catholic University of the Sacred Heart, Rome, Italy. gplotino@fastwebnet.it
Grande
N M
NM
Pameijer
C H
CH
Somma
F
F
D001641:Bicuspid; D002244:Carbon; D000077482:Carbon Fiber; D003188:Composite Resins / Q000737:chemistry; D017267:Dental Prosthesis Design; D018130:Diamond; D005898:Glass; D006801:Humans; D011176:Post and Core Technique; D013499:Surface Properties
D000077482:Carbon Fiber; D003188:Composite Resins; C009753:fiberglass; D002244:Carbon; D018130:Diamond