OBJECTIVES To determine the health status of periradicular tissue and the quality of root canal fillings in an adult Saudi population attending dental clinics for the first time. Methods: This cross sectional study was conducted  in the dental clinics at King Saud University, Riyadh and other dental centers (Jeddah, Najran, and Albaha City), Kingdom of Saudi Arabia between year 2010   and 2012....

BACKGROUND To compare the quality of calcium hydroxide paste fillings performed by three different techniques. MATERIAL AND METHODS Sixty extracted maxillary central incisors, with previous root canal treatment, were decoronated and the gutta-percha was completely removed from the root canals. Subsequently, the canals were filled with a calcium hydroxide-based paste composed of calcium hydrox...

INTRODUCTION The purpose of this study was to investigate the effectiveness of basic root canal treatment (BRT) with tactile working length determination in terms of radiographic and clinical outcome parameters compared with endodontic treatment with standard radiographic working length control. METHODS This was a clinical, multicenter, controlled, open-label trial to evaluate BRT effectivene...

Band theory is a pillar of solid state physics, laid down by Felix Bloch nearly a century ago. Based on the quantum mechanics of an electron moving under a periodic potential, band theory gives a remarkably simple criterion regarding metals and insulators: a band insulator is only possible when the number of electrons in the unit cell is an even integer. This textbook counting rule only assumes...

Derek Duggan In vivo microleakage evaluation of two root-filling materials in teeth without a coronal seal (Under the direction of Dr. Martin Trope) Two carrier-based materials were compared to assess their resistance to coronal microleakage in a dog model when no coronal seal was present. Histologic evidence of inflammation and infection were the outcome parameters used. Experimental teeth wer...

The aim of the present work is to study the External and Internal Root anatomy of Egyptian Maxillary First Permanent Molar.180 maxillary first permanent molar were randomly selected with intact roots, minimal occlusal decay, and without fillings. External morphological observations of roots were recorded including the number of roots , root trunk length, Maximum convexity level and the relation...

The effect of Super-EBA cement as a root-end filling placed in teeth before replantation was examined in eight molar roots in monkeys. After extraction, root ends were resected, the canals contaminated with oral bacteria, root-end cavities prepared, and fillings of Super-EBA placed before replantation. After 8 wk, the jaws were removed and prepared for histological examination. The tissue respo...