Premium
Treatment of crown fractured incisors with laminate veneer restorations. An experimental study
Author(s) -
Andreasen Frances M.,
Flügge Erik,
DaugaardJensen Jette,
Munksgaard E. Christian
Publication year - 1992
Publication title -
dental traumatology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.82
H-Index - 81
eISSN - 1600-9657
pISSN - 1600-4469
DOI - 10.1111/j.1600-9657.1992.tb00223.x
Subject(s) - veneer , crown (dentistry) , materials science , maxillary central incisor , dentin , fracture (geology) , flexural strength , composite material , dentistry , composite number , tooth fracture , luting agent , orthodontics , bond strength , medicine , adhesive , layer (electronics)
A method is described by which crown fractured incisors are restored with cast ceramic (Dicor) laminate veneers after initial treatment with either reattachment of the original crown fragment with a dentin bonding agent, with a composite resin build‐up or no treatment (i.e. the veneer alone is used to restore the incisal edge). In order to elucidate the effect of the fragment/composite‐tooth bonding interface on fracture strength of the restored teeth, the fracture strengths of the various treatment groups were compared to that of intact teeth supplied with Dicor laminate veneers. In an experimental investigation using central and lateral incisors from sheep, it was found that fracture strength (16.6 ±4.2 MPa) equal to that of intact incisors (16.1 ± 2.6 MPa) could be achieved using laminate veneers made of porcelain on fractured teeth whose crown fragments were reattached using a dentin bonding agent (5). In the present investigation, using the same experimental model but using cast ceramic (Dicor) laminate veneers, the fracture strength of the restored incisors was significantly increased (21.0 ± 3.7 MPa), exceeding that of intact teeth. The fracture strength of intact teeth was also exceeded in veneered incisors which were initially restored with a conventional composite resin build‐up (20.2±5.6 MPa). However, the greatest fracture strength (28.2 ±8.9 MPa) was achieved when a Dicor laminate veneer alone was used to restore the fractured ineisal edge. The strength was equivalent to that of intact teeth supplied with Dicor veneers (26.7 ± 6.3 MPa). While fracture strengths of teeth which were initially restored by fragment reattachment and then supplied with veneers exceeded that of intact teeth when veneer preparation was limited to enamel, they were reduced to the half of (hat of intact teeth (i.e. the same strength as teeth initially restored by fragment reattachment and no veneering) if the preparation extended into dentin. In the present experimental model, ii would appear that laminate veneers alone might be used to restore lost incisal edges of crown fractured anterior teeth.