Mechanical strength of tooth fragment reattachment.
The aim of this study was static and fatigue test investigation of the strength of a tooth fragment reattached with adhesives to the tooth body. Central bovine incisor teeth were used, and standardized fragments were obtained by cutting the incisal edge of the selected teeth. All the fragments were reattached using a multistep dentine adhesive system, and the specimens were randomly divided into two groups (A and B). Group B specimens underwent a further dental treatment: a circumferential double chamfer prepared around the external cut interface was filled with light cured composite restorative resin. Static and fatigue bending tests were performed and linear elastic equations were used to analyze and compare the strength of the treated teeth. The results indicated that the static and fatigue bending properties were improved by using reinforcement with composite restorative resin.
De Santis
R
R
Institute of Composite Materials Technology, National Research Council and Interdisciplinary Research Centre in Biomaterials, University of Naples Federico II, Piazzale Tecchio 80, 80125 Napoli, Italy. rosantis@unina.it
Prisco
D
D
Nazhat
S N
SN
Riccitiello
F
F
Ambrosio
L
L
Rengo
S
S
Nicolais
L
L
D000180:Acrylic Resins; D000818:Animals; D001696:Biomechanical Phenomena; D002417:Cattle; D003188:Composite Resins; D011140:Polyurethanes; D014082:Tooth Fractures
D000180:Acrylic Resins; C029012:Composite Dental Resin; D003188:Composite Resins; D011140:Polyurethanes