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Avaliação comparativa da translucidez do esmalte dentário e de ...

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Milko Villarroel, Ronal<strong>do</strong> Hirata, Andrea Maria <strong>de</strong> Sousa<br />

sobre seu grau <strong>de</strong> <strong>transluci<strong>de</strong>z</strong>, são consi<strong>de</strong>ra<strong>da</strong>s<br />

como principais objetivos na tentativa<br />

<strong>de</strong> imitar as proprie<strong>da</strong><strong>de</strong>s ópticas <strong>do</strong>s teci<strong>do</strong>s<br />

<strong><strong>de</strong>ntário</strong>s 11,15 .<br />

Nossos resulta<strong>do</strong>s estão coerentes com os<br />

obti<strong>do</strong>s por Craig 6 , Fontana et al. 12 , Jardim et<br />

al. 14 , Panzeri et al. 18 e Villarroel et al. 24 , que em<br />

estu<strong>do</strong>s <strong>de</strong> <strong>transluci<strong>de</strong>z</strong> <strong>do</strong>s materiais resinosos<br />

em espectrofotômetro ou em aparelho <strong>de</strong><br />

eletroforese “Jouan”, mostraram diferente níveis<br />

<strong>de</strong> <strong>transluci<strong>de</strong>z</strong> para os materiais estu<strong>da</strong><strong>do</strong>s.<br />

A diferença <strong>de</strong> <strong>transluci<strong>de</strong>z</strong> <strong>de</strong>tecta<strong>da</strong> para<br />

os materiais estu<strong>da</strong><strong>do</strong>s <strong>de</strong>ve estar relaciona<strong>da</strong><br />

com a composição <strong>de</strong> ca<strong>da</strong> um <strong>do</strong>s materiais,<br />

especificamente ao tipo, quanti<strong>da</strong><strong>de</strong> e tamanho<br />

<strong>da</strong>s partículas <strong>de</strong> carga.<br />

CONCLUSÃO<br />

De acor<strong>do</strong> com a meto<strong>do</strong>logia emprega<strong>da</strong><br />

foi possível concluir que:<br />

• Os valores <strong>de</strong> <strong>transluci<strong>de</strong>z</strong> <strong>da</strong>s resinas<br />

compostas para <strong>esmalte</strong> apresentaram gran<strong>de</strong><br />

variação entre os grupos;<br />

• Os grupos III (4 seasons enamel super clear),<br />

IV (Miris NT), VIII (Amelogen PF-A) e X (4 seasons<br />

enamel clear) apresentaram os valores <strong>de</strong><br />

<strong>transluci<strong>de</strong>z</strong> estatisticamente mais semelhantes<br />

ao grupo I (<strong>esmalte</strong>);<br />

• Os valores máximo e mínimo <strong>de</strong> <strong>transluci<strong>de</strong>z</strong><br />

foram <strong>da</strong><strong>do</strong>s pelos grupos V Vitalescence<br />

TM) e VI (Filtek A110 A2E) respectivamente,<br />

apresentan<strong>do</strong> diferenças significantes com o<br />

grupo I (<strong>esmalte</strong>).<br />

Comparative evaluation of the translucity of the<br />

<strong>de</strong>ntal enamel and composed resins for enamel<br />

Due to esthetical exigency, restorative <strong>de</strong>ntistry<br />

tries to imitate the natural characteristics<br />

of human teeth. Because of this, many last<br />

generation resin composites provi<strong>de</strong>, within<br />

their optical properties, a translucity similar<br />

to natural <strong>de</strong>ntition. This study evaluates and<br />

compares the translucity of <strong>de</strong>ntal enamel and<br />

of nine enamel resin composites. Five testing<br />

bodies were manufactured using a quadrangular<br />

metallic matrix for each group, which are:<br />

GI or control (<strong>de</strong>ntal enamel), GII (Esthet X YE),<br />

GIII (4 Seasons enamel super clear), GIV (Miris NT),<br />

GV (Vitalescence TM), GVI (Filtek TM A110 A2E),<br />

GVII (Concept® A2Be), GVIII (Amelogen PF-A),<br />

GIX (Filtek TM Supreme B1E) and GX (4 Seasons<br />

enamel clear). Translucity evaluation was performed<br />

by the Transmission Spectrophotometer FTIR 8400<br />

– Shimadzu. The <strong>da</strong>ta obtained was subjected to<br />

Anova test (Bonferroni) for statistical analysis,<br />

using a 5% significance level (p< 0.05). The results<br />

<strong>de</strong>monstrated a great variation in the translucity<br />

values between the study groups. Accordingly<br />

to the metho<strong>do</strong>logy used, we can conclu<strong>de</strong> that<br />

there are different grates of translucity in the<br />

evaluated resin composites. GIII, GIV, GVIII and<br />

GX provi<strong>de</strong>d a translucity statistically similar<br />

to GI. The highest and lowest grates were<br />

obtained, respectively, by GV and GVI; both of<br />

them presented a significant difference when<br />

compared to control group.<br />

KEY WORDS: Dental enamel. Resin composite. Translucity.<br />

R Dental Press Estét - v. 2, n. 3, p. 22-34, jul./ago./set. 2005<br />

33

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