Comparison of the Accuracy and Efficiency of a 3-Dimensional Dynamic Navigation System for Osteotomy and Root-end Resection Performed by Novice and Experienced Endodontists.

Introduction: The aim of the study is to investigate whether the 3-dimensional dynamic navigation system (3D-DNS) can improve experienced endodontists' (EEs') and novice endodontists' (NEs') accuracy and efficiency in osteotomy and root-end resection (RER) and to verify that the 3D-DNS enables NEs to perform osteotomy and RER as accurately and efficiently as EEs.

Methods: Seventy-six roots in cadaver heads were randomly divided into 4 groups: 3D-DNS-NE, 3D-DNS-EE, freehanded (FH)-NE, and FH-EE (all, n = 19). Cone-beam computed tomography scans were taken preoperatively and postoperatively.

Real-time 3-dimensional Dynamic Navigation System in Endodontic Microsurgery: A Cadaver Study.

Introduction: This study evaluated the accuracy and efficiency of the 3-dimensional dynamic navigation system (3D-DNS) to perform minimally invasive osteotomy (MIO) and root end resection (RER) in endodontic microsurgery (EMS) and investigated the viability of root end cavity preparation (RECP) and root end fill (REF) in MIO.

Methods: Forty-eight tooth roots were divided in cadaver heads into 2 groups: 3D-DNS (n = 24) and freehand (n = 24). Cone-beam computed tomographic scans were taken before and after surgery.

Accuracy and Efficiency of 3-dimensional Dynamic Navigation System for Removal of Fiber Post from Root Canal-Treated Teeth.

Introduction: The purpose of this study was to investigate the accuracy and efficiency of the 3-dimensional dynamic navigation system (DNS) compared with the freehand technique (FH) when removing fiber posts from root canal-treated teeth.

Methods: Twenty-six maxillary teeth were included. Teeth were root canal treated and restored with Parapost Taper Lux (Coltene/Whaledent, Altstätten, Switzerland) luted with RelyX Unicem (3M ESPE, St Paul, MN).

What every dentist needs to know about electronic cigarettes.

Electronic cigarette (EC) use is on a steady rise, leading to increased concerns about its efficacy with regard to tobacco cessation goals and safety with regard to systemic and oral health. Recent studies have shown that EC flavoring agents can have adverse effects similar to those of combustible tobacco products. Evidence is mounting that EC use should not be considered a healthier alternative to tobacco smoking.

Guided Endodontic Access in a Maxillary Molar Using a Dynamic Navigation System.

The treatment of calcified root canals is challenging in endodontic practice. A 63-year-old man was referred to the postgraduate endodontic clinic at the University of Maryland School of Dentistry, Baltimore, MD, for the treatment of tooth #3. Because of the patient's history of head and neck radiation and the high risk of developing osteoradionecrosis, a nonsurgical endodontic approach was found to be the most reasonable treatment option despite the questionable prognosis of the tooth.

Accuracy and Efficiency of a Dynamic Navigation System for Locating Calcified Canals.

Introduction: Calcified canals present a challenge during endodontic treatments. The purpose of this study was to compare the accuracy and efficiency of a dynamic navigation system (DNS) to the freehand (FH) method for locating calcified canals in human teeth.

Methods: Sixty human single-rooted teeth with canal obliteration were selected and mounted in dry cadaver jaws.

Central xanthoma of the mandible associated with hyperlipidemia: A rare presentation.

Xanthoma is a common, self-limiting cutaneous lesion of non-Langerhans cell, lipid-laden foamy histiocytes that is often concomitant with hyperlipidemia. The intraosseous counterpart is rarely encountered and typically presents as a painless, expansile osteolytic process in the context of hyperlipidemia or normolipidemia. Only a scant number of gnathic xanthomas have been reported in the otolaryngologic literature.

Large Cell Transformation of Oral Mycosis Fungoides.

Mycosis fungoides (MF) accounts for approximately 50% of all primary cutaneous lymphomas. MF occurrence in the oral cavity is extremely rare with approximately 45 cases reported to date. We present a case of a 68 year-old man with a raised nodular lesion of the ventral tongue with clinical impression of irritational fibroma.