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Results: Golden proportion was not found in the entire sample.
Regardless of age and sex, 70% of the sample has an average lip
position, and consonant smile arc was the most prevalent form
among 73.3% of the sample. A2 was the common teeth shade
regardless the tooth position. Almost half of the participants were
satisfied about their overall appearance and only 6 subjects were
not satisfied about the size of their teeth.
Conclusions: The golden proportion was non-existent. Most preva-
lent shade was A2 in both genders. The perception of smile was
different from one subject to another regardless the gender.
P011
A Clinical Study on Patient Satisfaction with Tooth Bleaching
Ana Fernandes
1
,B
!
arbara Costeira
1
, Teresa Carrilho
1
, Sofia
Coelho
1
, Miguel Marto
1
, Francisco Caramelo
1
, Manuel Marques
1
,
Lee Boushell
2
, Anabela Pereira
1
1
Faculty of Medicine, University of Coimbra, Coimbra, Portugal,
2
Department of Operative Dentistry, School of Dentistry,
University of North Carolina, NC, USA
Aim or purpose: The aims of this research study were two-fold: (i)
To compare the degree of patient satisfaction among various tooth
bleaching protocols and (ii) To assess long term effectiveness and
associated side effects among the various tooth bleaching protocols.
Materials-methods: One hundred and one patients, that had
received tooth bleaching treatment between 1992 and 2015, were
included. Research study participants completed a questionnaire
(right after treatment and then again in 2015) and received a clini-
cal and radiographic examination of the maxillary anterior teeth.
Results: The questionnaire revealed that 97% of patients were sat-
isfied with the bleaching result immediately after treatment com-
pletion. Ninety one percent of the participants reported both short
term and long term satisfaction with the bleaching result. The
questionnaire revealed that 18.8% of the participants had experi-
enced some type of adverse reaction while undergoing tooth
bleaching procedures. Two percent of the participants reported
that they were currently still experiencing gingival sensitivity. The
tendency for shade return to pretreatment levels was not found to
be statistically significantly related to time. The clinical examina-
tion revealed that the shade of 53.5% of the teeth evaluated had
returned to pretreatment shade. Clinical and radiograph examina-
tions revealed normal appearance of gingival and dental tissues
and normal responses to thermal stimuli.
Conclusions: A majority of participants reported tooth bleaching
results in long-lasting, stable improvement in tooth shade. Clinical
evaluation of participants revealed no detectable side effects with
approximately one half of bleached teeth returning to a pre-bleach
shade.
P012
Anterior Esthetics with Prefabricated Composite Veneers: A Novel
Technique
Ali Osman Demirhan, L S
!ebnem T€
urk€
un
Department of Restorative Dentistry, School of Dentistry, Ege
University, Izmir, Turkey
Introduction: Prefabricated resin composite veneers have been
developed recently as an alternative to indirect ceramic laminate
veneers. They are manufactured in different sizes and colors and
are applied in a single session. The adhesion of these resin com-
posite veneers to tooth structures is similar to indirect technique
but without a laboratory step. This case report series aim to pre-
sent the application steps and aesthetic outcomes of a prefabri-
cated resin composite veneer system (Componeer, Colt#
ene,
Switzerland) for conservative diastema closure of 3 patients having
complains of unaesthetic appearance.
Case description: Two female patients aged of 17 and 29, and one
male patient aged of 54 with no systemic diseases and having good
oral hygiene were treated. Intraoral examination revealed diastemas
between their maxillary central incisors. The size and the color of
the prefabricated resin composite veneers were selected according to
the color of the natural teeth and the amounts of diastemas between
the teeth. The teeth were prepared in enamel level, etching and
bonding procedures were performed with an Etch&Rinse adhesive
system (One Coat Bond, Colt#
ene, Switzerland) and the selected pre-
fabricated resin composite veneers were fixed to the teeth with a
hybrid resin composite material having the same composition as the
prefabricated veneers. The margin adjustments and polishing were
performed with diamond burs and polishing pastes.
Conclusion: This minimal invasive and conservative alternative
treatment option could achieve a very good aesthetic outcome in
only a single session. The treatment procedure with Componeer
systems was also very well accepted by the patients.
P013
Effect of Non-Vital Bleaching on the Durability of Resin-Dentin
Bond With an Ethanol-Based Etch-and-Rinse Adhesive
Alireza Boruziniat
1
, Zafer C Chereli
2
, Atefeh Atoufi
1
1
Department of Operative and Cosmetic Dentistry, School of
Dentistry, Mashhad University of Medical Sciences, Iran,
2
Department of Pediatric Dentistry, School of Dentistry,
University of Ankara, Ankara, Turkey
Aim: Bleaching may affect the bond strength of adhesive systems.
The purpose of this study was to evaluate the immediate and labo-
ratory-aged dentin bond strength of an etch-and-rinse adhesive
after bleaching.
Methods-materials: Flat dentin surface of intact human third
molars (n =18) were randomly divided into two groups for imme-
diate and 6-month bond strength evaluation. Specimens were fur-
ther assigned into three subgroups according to treatment
procedure: control: No bleaching was performed prior to bonding
and subsequent build-up with composite; Subgroup B: The sam-
ples were bleached with 20% Carbamide peroxide 6 h/day for 5
consequent days prior to bonding; Subgroup C: Bleaching was per-
formed as with subgroup B, after which 10% sodium ascorbate
was applied on dentin surface for 10 min before bonding proce-
dures. Microtensile bond strength test was performed and failure
modes were evaluated under a stereomicroscope. Data were ana-
lyzed using One-way ANOVA and Tukey’s post-hoc tests.
Results: Bleaching significantly decreased the immediate and 6-
month bond strength. Application of sodium ascorbate had no
International Dental Journal 2016; 66 (Suppl. 1): 2--56
©2016 The Authors. International Dental Journal ©2016 FDI World Dental Federation
29