Revista de Odontologia da UNESP
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Revista de Odontologia da UNESP
Original Article

Influência do Tipo de Ponteira Condutora de Luz de Aparelhos LED na Microdureza das Resinas Compostas

Influence of the differents lightcuring tips of LED photo-curing units in the microhardness of the composite resins

Ccahuana Vásquez, R.A.; Torres, C.R.G.; Araújo, M.A.M.; Anido, A.A.

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Resumo

Avaliou-se a influência do tipo de ponteira condutora de luz de aparelhos LED na microdureza das resinas compostas. Os espécimes foram confeccionados utilizando-se matriz de aço com perfurações padronizadas. As resinas Fill Magic-Vigodent (FM), Z100-3M, TPH Spectrum- Dentsply (TPH) e Glacier-SDI (GL) foram inseridas em incremento único e polimerizadas (40 s) com os aparelhos Optilight LD-Gnatus (OL) e Light 3000-Clean Line (LI), alternando-se o tipo de ponteira condutora de luz (Fibra Óptica–FO ou Polímero–PO) e vieram a compor os seguintes grupos (n = 10): G1A - FM + OL + FO; G1B - FM + OL + PO; G2A - FM + LI + FO; G2B-FM +LI + PO; G3A - Z100 + OL + FO; G3B - Z100 + OL + PO; G4A - Z100 + LI + FO; G4B - Z100 + LI + PO; G5A - TPH + OL + FO; G5B - TPH + OL + PO; G6A - TPH + LI + FO; G6B - TPH + LI + PO; G7A - GL + OL + FO; G7B - GL + OL + PO; G8A - GL + LI + FO; G8B - GL + LI + PO. A dureza Vickers da superfície foi avaliada por meio de um microdurômetro (FM-700, Future- Tech, 50 g/10 s). Para a análise estatística, foram empregados os testes t não pareado, ANOVA e Tukey. As médias (± DP) obtidas foram: G1A:45,9(± 1,8)/G1B:47,9(± 2,8) com p = 0,08; G2A:44,3(± 2,6)/G2B:41.5(± 3,2) com p = 0,04; G3A:90,0(± 2,3)/G3B:90,4(± 3,7) com p = 0,77; G4A:81,55(± 5,0)/G4B:79, 4(± 4,6) com p = 0,34; G5A:46,55(± 1,4)/G5B:52,60(± 2,0) com p = 0,00; G6A:42,3(± 2,5)/G6B:42,9(± 3,7) com p = 0,70; G7A:36,1(± 4,1)/G7B:39,1(± 3,3) com p = 0,09; G8A:23,8(± 1,9)/G8B:22,0(± 1,8) com p = 0,04. Concluiu-se que, para o aparelho Optilight LD, a ponteira polimérica proporciona melhores resultados, enquanto, para Light 3000, a ponteira de fibra óptica é mais favorável.

Palavras-chave

Fotopolimerização, luz emitida por diodo, resinas compostas.

Abstract

The aim of this study was to evaluate the influence of differents light-curing tips of LED photo-curing units in the microhardness of the composite resins The specimens were prepared with a steel matrix standardized. The composites Fillmagic-Vigodent (FM), Z100-3M, TPH Spectrum- Dentsply and Glacier-SDI (GL) were inserted in a bulk increment and photocured (40s) using the photocuring units Optilight LD-Gnatus (OL) and Light 3000-Clean Line (LI), altering the type of light-curing tips (Fiber Optic-FO or Polimer-PO) resulting in the following groups (n = 10): G1A -FM + OL + FO; G1B - FM + OL + PO; G2A - FM + LI + FO; G2B - FM + LI + PO; G3A - Z100 + OL + FO; G3B - Z100 + OL + PO; G4A - Z100 + LI + FO; G4B - Z100 + LI + PO; G5A -TPH + OL + FO; G5B - TPH + OL + PO; G6A - TPH + LI + FO; G6B - TPH + LI + PO; G7A -GL + OL + FO; G7B - GL + OL + PO; G8A - GL + LI + FO; G8B - GL + LI + PO. The hardness Vickers of the surface was evaluated with a microhardness tester (FM-700, Future-Tech, 50g/10s). For statistical analysis were used the non-paired t, ANOVA and Tukey’s tests. The mean (± SD) obtained were: G1A:45,9(± 1,8)/G1B:47,9(± 2,8) with p = 0,08; G2A:44,3(± 2,6)/G2B:41.5(± 3,2) with p = 0,04; G3A:90,0(± 2,3)/G3B:90,4(± 3,7) with p = 0,77; G4A:81,55(± 5,0)/G4B:79,4(± 4,6) with p = 0,34; G5A:46,55(± 1,4)/G5B:52,60(± 2,0) with p = 0,00; G6A:42,3(± 2,5)/G6B:42,9(± 3,7) with p = 0,70; G7A:36,1(± 4,1)/G7B:39,1(± 3,3) with p = 0,09; G8A:23,8(± 1,9)/G8B:22,0(± 1,8) with p = 0,04. We concluded that for OL + TPH a greater hardness was observed when the PO was used. For LI + FM and LI + GL a greater hardness was observed when the FO was used.

Keywords

Photopolymerization, light emitting diode, composite resins

References



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