Peter Zahi Tawil

Learn More
Early loss of immature permanent teeth due to pulpal necrosis secondary to trauma can have dire consequences for a child's growth and development. The treatment alternatives include surgical endodontics, traditional calcium hydroxide apexification, and mineral trioxide aggregate (MTA) apexification. These options pose potential complications, including:(More)
The purpose of this study was to assess the healing of periapical tissues using three different materials (IRM [L.D. Caulk Inc, Dentsply International Inc, Milford, DE], Geristore [Den-Mat, Santa Maria, CA], and MTA [ProRoot MTA; Dentsply Tulsa Dental Specialties, Tulsa, OK]) after endodontic microsurgery in an animal model. Using beagle dogs as a study(More)
INTRODUCTION The objective of this study was to use light-emitting diode (LED) transillumination to assess the presence of dentinal defects in roots instrumented with 3 different root canal preparation systems: ProFile (Dentsply Tulsa Dental Specialties, Tulsa, OK), TRUShape (Dentsply Tulsa Dental Specialties), and WaveOne Gold (Dentsply Tulsa Dental(More)
This study investigated the effect of potent intracanal corticosteroids on periodontal healing of replanted avulsed teeth and evaluated the systemic absorption of these corticosteroids. Sixty-seven extracted dog premolar roots were randomly assigned to one of the following groups: groups 1-3 filled with gutta-percha and replanted immediately and after 40(More)
INTRODUCTION The purpose of this study was to subject 2 carrier-based root filling products to a 4-month microbial challenge in a dog model with histologic markers to assess periapical inflammation and bacterial penetration of the 2 filling materials. Histologic evidence of bacterial penetration and periapical inflammation were the outcome parameters used(More)
INTRODUCTION The purpose of this prospective clinical study was to evaluate the clinical outcome of endodontic microsurgery on roots exhibiting the presence or absence of dentinal defects at 1-year and 3-year follow-up period. METHODS One hundred fifty-five teeth were treated with periapical microsurgery using a modern microsurgical protocol in a private(More)
Mineral trioxide aggregate (MTA) has been a revolutionary material in endodontics. Since its introduction in the 1990s several studies have demonstrated its use in various clinical applications. MTA has been extensively studied and is currently used for perforation repairs, apexifications, regenerative procedures, apexogenesis, pulpotomies, and pulp(More)
INTRODUCTION Several recent studies have evaluated the presence of dentinal defects after root canal preparation in extracted human teeth by using the root sectioning methodology. The objective of this research was to investigate whether light-emitting diode (LED) transillumination enhances the visualization of dentinal defects by using a root sectioning(More)
INTRODUCTION The accurate interpretation of a cone-beam computed tomographic (CBCT) volume is critical in identifying the presence of disease correctly and consistently. The aim of this clinical study was to determine the effect of experience level on the detection of periapical lesions in CBCT volumes. METHODS CBCT volumes of 22 maxillary molars were(More)
INTRODUCTION The purpose of this prospective, double-blind, randomized clinical trial was to evaluate the postoperative healing of endodontic periapical microsurgery after local administration of dexamethasone. METHODS Sixty patients were divided into 2 groups. The dexamethasone group received a single local submucosal injection of 4 mg dexamethasone, and(More)