Intentional Replantation to Treat Apical Periodontitis of Maxillary First Molar with Foreign Body Located Outside Apical Foramen Using CBCT: A Case Report.

The recent use of cone beam computed tomography (CBCT) in the field of dentistry to obtain 3-dimensional (3D) images has enabled more effective examination and diagnosis in endodontic treatment. Such information has also been reported to be of benefit in surgical endodontic treatment such as intentional replantation. Here, we report a case of intentional replantation with the assistance of CBCT in which a good therapeutic outcome was achieved.

Analysis of Needlestick and Similar Injuries over 10 Years from April 2004 at Tokyo Dental College Chiba Hospital.

Here we investigated needlestick and similar injuries reported over a 10-year period between April 2004 and March 2014. The purpose of this study was to prevent recurrence and reduce the incidence of such injuries at Tokyo Dental College Chiba Hospital. The Division of Medical Risk Management at Chiba Hospital anonymized the data to protect personal information prior to analysis.

CBCT-based Diagnosis of Periapical Lesion of Maxillary First Premolar Mimicking That of Second Premolar.

Apical periodontitis is usually diagnosed based on clinical findings and dental X-rays. Recently, however, dental cone beam computed tomography (CBCT), which provides 3-D images of the maxillofacial region, has enabled dentists to examine patients undergoing endodontic therapy more effectively, improving diagnostic accuracy. Here, we describe a positive treatment outcome achieved using CBCT to diagnose apical periodontitis of the maxillary premolars, which had proven difficult to diagnose based on clinical findings and dental radiography alone.

Personality traits in patients with oral malodor.

Many patients presenting at oral malodor clinics have psychological halitosis, which is characterized as being obsessive about having oral malodor or being distressed from a keen awareness of oral odor. We used the Tokyo University Egogram (TEG) to evaluate personality traits in patients presenting at the oral malodor clinic of this institute. The incidence of each TEG personality type was compared between a total of 600 patients presenting at the clinic and a cohort of healthy individuals.

Accidental ingestion or aspiration of foreign objects at Tokyo Dental College Chiba Hospital over last 4 years.

The aim of this study was to investigate cases of accidental ingestion or aspiration occurring at Tokyo Dental College Chiba Hospital over the last 4 years in order to determine how the incidence of such events could be reduced. Forty cases of accidents occurring at our hospital over a 4-year period commencing in 2008 (representing 27% of the total number of accidents) included accidental ingestion in 39 patients and aspiration in one. Most of these accidents occurred during the removal or placement of restorations or prosthetics, and the ingested objects were mostly crowns and inlays.

An endodontic-periodontal lesion with primary periodontal disease: a case report on its bacterial profile.

The microflora in the periodontal pockets can affect the dental pulp and cause endodontic-periodontal lesions or retrograde pulpitis. Here we report an endodontic-periodontal lesion together with its bacterial profile. The lesion occurred in the maxillary right first molar of a 40-year-old woman who presented at our hospital complaining of a violent toothache since the previous night.

Digital video image processing from dental operating microscope in endodontic treatment.

Recently, optical microscopes have been used in endodontic treatment, as they offer advantages in terms of magnification, illumination, and documentation. Documentation is particularly important in presenting images to patients, and can take the form of both still images and motion video. Although high-quality still images can be obtained using a 35-mm film or CCD camera, the quality of still images produced by a video camera is significantly lower.

Character traits of malodor patients.

Many patients visit oral malodor clinics because of malodors which are brought to their attention by friends and family, or because they note the behavior of people around them, they suspect a problem and develop a fear of having an oral malodor. However, only around 30% of such patients actually have levels of malodor high enough to bother other people. Many patients exhibit halitophobia symptoms, which present as self-perception of malodor, and thus have a strong obsession about their smell which results in distress.

Dens evaginatus on occlusal surface of maxillary second molar: a case report.

Dens evaginatus is a rare dental anomaly characterized by the development of a tubercle on the occlusal surface of the tooth and can cause pulpitis, pulp necrosis, and periapical periodontitis due to tubercular fracture or attrition. Unlike with caries, pain caused by dens evaginatus may manifest itself in a distant location. Therefore, diagnosing the cause of that pain may prove problematic.

Survey of accidental ingestion and aspiration at Tokyo Dental College Chiba Hospital.

The occurrence of accidental ingestion/aspiration and preventive measures were investigated at Tokyo Dental College Chiba Hospital. In addition, the characteristics of accidents at our hospital were analyzed by surveying the awareness of accidental ingestion/aspiration to utilize the data for prevention. Accidental ingestion accounted for about 30% of accidents that occurred at our hospital in fiscal 2008, but all ingested items were naturally excreted, and no accidental aspiration occurred.

Clinical usefulness of "Isolite Plus" for oral environment of Japanese people.

The recent demand for dental devices which are easier to handle and offer higher levels of reliability and safety has led to the development in the US of Isolite Plus, a new oral support device. When placed in the oral cavity, Isolite Plus enables marking of the surgical field, secures the treatment space, ensures a vacuum, protects the cheek and tongue, assists in opening the mouth, prevents accidental ingestion/aspiration, ensures treatment without contamination and enhances comfort and safety during dental treatment. The present study was carried out to verify whether Isolite Plus can fit well in the mouth of Japanese people and to determine whether it performs adequately.

Clinical training in department of general dentistry at Tokyo Dental College Chiba Hospital.

A compulsory postgraduate clinical training program was established in April 2006 in Japan, and an applicants-only postgraduate training program 9 years ago at Tokyo Dental College. In addition, a training program was also established in the Department of General Dentistry at Tokyo Dental College Chiba Hospital in April 2002. The curriculum consists of training in the outpatient clinic and the following: 1) clinical training (preparation of written treatment plans, simulation practice, submission of evaluation sheets, and submission of training journals), 2) tutorials, and 3) case reports.

Tissue reactions after intraosseous implantation of three retrofilling materials.

Bone tissue reactions to EBA, IRM, and cyanoacrylate cement (Base Liner) were studied in the rat mandible using an intraosseous implant method. Osseous cavities (1.4 mm in diameter) were surgically created in the mandibles, and materials were implanted in 60 male Wistar rats.