A hybrid type of composite resins is used as dental restorative materials in a wide cavity directly or indirectly. The mechanical properties of the composite resin would increase post-curing. The purpose of this study was to determine the differences between the compressive strength of hybrid type composite resin post-curing using LED light box and dry heating. This type of research was a quasi-experimental in vitro with the sample size of 30 samples which were divided into two groups. Each sample was tested using a Universal Testing Machine (Lloyd) at a speed of 1 mm/minute to test the compressive strength. Compressive strength values were recorded when the sample broke. The average value of compressive strength of the two treatment groups was statistically calculated using t-test. The results, of this study, showed that a hybrid composite resin with post curing using a light box with LED was at 194.138 Mpa which was lower than using the dry heat of 227.339 Mpa. It showed the statistically significant difference. The conclusion of this study was that the compressive strength of post-cured hybrid composites using a light box with LED was significantly lower than the post-curing using dry heat.

119 Perawatan apeksifikasi pada gigi permanen muda insisivus pertama kiri atas yang non-vital ABSTRAKGigi permanen muda yang mengalami kerusakan karena karies atau trauma dapat berakibat nekrotik sebelum perkembangan dan pertumbuhan akar selesai, sehingga menyebabkan saluran akar tidak terbentuk sempurna dan apeks terbuka. Kesulitan dalam melakukan perawatan saluran akar gigi tersebut karena tidak adanya apical stop, sehingga obturasi tidak dapat dilakukan karena bahan pengisi akan terdorong ke periapikal. Tujuan dan perawatan pada gigi anterior dengan diagnosis nekrosis adalah untuk tercapainya saluran akar yang menutup apikal akar dengan deposit jaringan keras, dengan cara apeksifikasi. Obat yang digunakan adalah kalsium hidroksid dengan sifat basa kuat dan dapat memberikan efek antimikroba serta mampu melarutkan jaringan. Hasil yang dicapai adalah terjadi penutupan apeks gigi, jaringan lunak di sekitar gigi dalam keadaan normal atau tidak dijumpai adanya gambaran radiolusen yang merupakan tanda patologis di bagian periapikal. Setelah dilakukan perawatan apeksifikasi pada gigi permanen muda yang mengalami nekrosis, dsimpulkan bahwa hasil perawatan memperlihatkan keberhasilan yang ditandai dengan penutupan foramen apikal, jarinan lunak di sekitar gigi normal dan radiologis tidak dijumpai gambaran radiolusen. Kata kunci: gigi permanen muda, nekrosis pulpa, perawatan apeksifikasi

Hybrid composites are mostly used on large cavities as restorative dental materials, whether it is used directly or indirectly. The mechanical properties of composite resin shall increase if it is treated with post cure treatment. The aim of this study is to evaluate compressive strength differences between dry heat and Light Emitting Diodes (LED) treatment on the hybrid dental composite. A quasi-experimental was applied on this research with a total of 30 samples that were divided into two groups. Each sample was tested using LLOYD Universal Testing Machine with 1 mm/min speed to evaluate the compressive strength. The compressive strength results were marked when the sample was broken. The results of two groups were then analyzed using t-test statistical calculation. The results of this study show that post cure treatment on hybrid composite using LED light box (194.138 MPa) was lower than dry heat treatment (227.339 MPa), which was also significantly different from statistical analysis. It can be concluded that compressive strength of LED light box was lower than dry heat post-cure treatment on the hybrid composite resin.