ABSTRAK
Latar Belakang: siler polidimetilsiloksan merupakan siler baru yang berpotensi menutup saluran akar lebih baik. Tujuan: membandingkan tingkat kerapatanpengisian di sepertiga apeks antara teknik kon tunggal (KT) dan downpackbackfill(DB) menggunakan siler polidimetilsiloksan. Metode: empat puluh gigipremolar bawah dibagi menjadi dua kelompok KT dan DB. Setelah pengisiansaluran akar, sampel diinkubasi, dilapisi cat kuku, direndam dalam tinta India, laludibuat transparan dengan metode Robertson. Kebocoran di sepertiga apeksdievaluasi dengan mikroskop stereo. Hasil: skor kebocoran terendah (0-0,5 mm)dimiliki oleh kelompok KT dan skor kebocoran tertinggi (>1 mm) dimiliki olehkelompok DB. Kesimpulan: teknik kon tunggal memberikan tingkat kerapatanyang lebih baik dibandingkan downpack-backfill, walaupun secara statistik perbedaan antar keduanya tidak signifikan. ABSTRACT
Background: polydimethylsiloxane sealer is a brand new sealer that potentiallyhas a better sealing ability to the root canal. Aim: to compare the apical sealingability in one third apex between single cone (SC) and downpack-backfill (DB)technique using polydimethylsiloxane sealer. Methods: fourty extracted humanmanibular premolars devided into two group, SC and DB. After obturated withpolydimethylsiloxane sealer, samples were stored in incubator, coated with nailvarnish, immersed in India ink, and then specimens were cleared usingRobertson?s technique. The apical dye penetration was evaluated using astereomicroscope. Result: the lowest leakage score (0-0,5 mm) was found in SCgroup and the highest score(>1 mm) in DB group. Summary: single conetechnique exibited better sealing ability rather than downpack-backfill technique, although no statistical significant difference between this two techniques. ;Background: polydimethylsiloxane sealer is a brand new sealer that potentiallyhas a better sealing ability to the root canal. Aim: to compare the apical sealingability in one third apex between single cone (SC) and downpack-backfill (DB)technique using polydimethylsiloxane sealer. Methods: fourty extracted humanmanibular premolars devided into two group, SC and DB. After obturated withpolydimethylsiloxane sealer, samples were stored in incubator, coated with nailvarnish, immersed in India ink, and then specimens were cleared usingRobertson?s technique. The apical dye penetration was evaluated using astereomicroscope. Result: the lowest leakage score (0-0,5 mm) was found in SCgroup and the highest score(>1 mm) in DB group. Summary: single conetechnique exibited better sealing ability rather than downpack-backfill technique, although no statistical significant difference between this two techniques. ;Background: polydimethylsiloxane sealer is a brand new sealer that potentiallyhas a better sealing ability to the root canal. Aim: to compare the apical sealingability in one third apex between single cone (SC) and downpack-backfill (DB)technique using polydimethylsiloxane sealer. Methods: fourty extracted humanmanibular premolars devided into two group, SC and DB. After obturated withpolydimethylsiloxane sealer, samples were stored in incubator, coated with nailvarnish, immersed in India ink, and then specimens were cleared usingRobertson?s technique. The apical dye penetration was evaluated using astereomicroscope. Result: the lowest leakage score (0-0,5 mm) was found in SCgroup and the highest score(>1 mm) in DB group. Summary: single conetechnique exibited better sealing ability rather than downpack-backfill technique, although no statistical significant difference between this two techniques.