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.
Rev. odontol. UNESP, vol.33, n2, p.69-73, 2004
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
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