ABSTRAK
Latar Belakang Instrumen rotasi kontinyumemiliki banyak kekurangansehingga dikembangkan instrumen resiprokal Tujuan penelitian iniadalahmembandingkan kehalusan dinding sepertiga apikal saluran akarmenggunakan instrumen rotasi kontinyu dan resiprokal Metode Tiga puluh duapremolar pertama mandibula dibagi menjadi Kelompok 1 preparasi saluran akarmenggunakan instrumen rotasi kontinyu dan Kelompok 2 preparasi saluran akarmenggunakan instrumen resiprokal Kemudian kehalusan diukur dengan surfaceroughness tester Analisis data menggunakan uji T tidak berpasangan Hasil Tidak terdapat perbedaaan bermakna antara kedua kelompok p 0 739 Kesimpulan Dinding sepertiga apikal saluran akar yang dipreparasi denganinstrumen kontinyudanresiprokalmempunyai tingkat kehalusan yang sama

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ABSTRACT
Therefore reciprocal instruments have been developed The aim was to comparethe root canal wall smoothness at the apical third between continuous rotation andreciprocal instruments Methods Thirty two mandibular first premolars weredivided into Group 1 continuous rotation instruments preparation Group 2 reciprocal instruments preparation The smoothness was measured using surfaceroughness tester The data was analyzed using independent T test Result Thedifference between groups were not statistically significant p 0 739 Conclusion Continuous rotation and reciprocal instruments have no difference inthe root canal wall smoothness at the apical third