ABSTRAK
Penelitian ini bertujuan mengevaluasi pengaruh lama penyinaran LED curing unitdengan waktu 1,3 detik dari LED curing unit ultra high intensity (Flash Max P3,intensitas 4000 mW/cm2) dan 20 detik dari LED konvensional (Ledmax 450,intensitas 450 mW/cm2) terhadap kekuatan tarikan diametral resin kompositpackable. Uji kekuatan tarik diametral menggunakan Universal Testing Machine.Hasil uji kekuatan tarik diametral diperoleh 31,1±6,84 MPa; 42,9±8,26 MPa dan52,5±7,52 MPa. Analisa statistik independent t-test menunjukkan perbedaanbermakna (p<0,05). Dapat disimpulkan, lama penyinaran dari LED curing unitultra high intensity mempengaruhi kekuatan tarik diametral resin kompositpackable.

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ABSTRACT
That aim of study to evaluate the influence of the curing time of LED curing uniton diametral tensile strength composite resin packable with 1,3 second from ultrahigh intensity LED curing unit (Flash Max, intensity 4000 mW/cm2) and 20seconds from convensional LED (Ledmax 450, intensity 450 mW/cm2). UniversalTesting Machine was used and the results showed diametral tensile strength of31,1±6,84 MPa; 42,9±8,264 MPa; 52,5±7,52 MPa. The result was independent tteststatistically significant (p<0,05). In conclusion, curing time of ultra highintensity LED curing unit influences the diametral tensile strength of packablecomposite resin.