Clinical survival of laminate veneers bonded to teeth with and without existing composite restorations: up to 10 year follow up

The use of ceramic laminate veneers as opposed to
metal-ceramic or all-ceramic full-coverage crowns is a
minimal invasive treatment option in reconstructive dentistry.
Since their retention relies solely on adhesion,
durable adhesion of resin luting cements to both the
enamel/dentin and the cementation surface of the ceramic
is crucial. Ceramic laminates are indicated not only to restore
malformed, malpositioned, or discolored teeth where
mainly the substrate is the enamel and/or dentin but
also in situations where resin composite restorations
are present on the tooth to be restored. In case of
secondary caries, severe marginal or surface changes,
it may be necessary to remove such restorations. On
the other hand, degradation of polymers in the aggressive
oral environment may decrease the free radicals
available on the resin surface that may eventually decrease
the adhesion of resin cements to such composites. However, limited information
is available on the
survival of ceramic laminates on such existing composite
restorations where mainly fractures and marginal
defects were reported. Defects were especially
noticed at the locations where the existing fillings were
present. In fact, today, advances in surface conditioning
methods and adhesion promoters enable durable
composite-composite adhesion. Among numerous other
methods, several studies reported increased composite-
composite bond strengths after conditioning the composites
with alumina or alumina-coated silica particles
followed by silanization. therefore in this study we will evaluate the longterm
outcome of laminate veneers bonded to teeth with existing restorations.

To evaluate the performance of ceramic laminate veneers
bonded onto either intact teeth or to teeth with existing
composite restorations with no indications of caries,
ditching, or marginal staining.

This study is retrospective and evaluative. 110 patients were treated with
laminate veneers between 2007 and 2017, in total 450 laminate veneers were made
by a dentist/specialist. All teeth were evaluated before insertion of the
laminate veneers on the amount of dentin/enamel and the existence of existing
restorations. All teeth will be evaluated by two independent operators.
Pictures will be taken of the veneers and they will be evaluated using a USPHS
questionnaire. Laminate veneers will be checked on adaptation of the veneer,
color match, marginal discoloration, surface roughness, fracture of the
restoration, fracture of the tooth, wear of the restoration, wear of the
opposing teeth, caries, postoperative pain. A patient questionairre will be
given to the patient.

Checkup of 20 minutes, filling out a questionnaire, no risk, no intervention
takes place.