Abstract The aims of this study were to evaluate in detail the skill improvement in intraoral radiography and to analyze the results of a questionnaire survey regarding trainee dentists’ satisfaction with the training.

 The subjects were trainee dentists who received the training at our department in 2012 and 2014.

 The skill improvement was evaluated by comparing radiographs taken on the first and last days of the training. The questionnaire survey was conducted on seven items at the end of the training.

 Although the technique of intraoral radiography had improved by the last day compared to the first day, the horizontal and vertical projection angles were difficult to be set in certain teeth. In such cases, further training over a longer period would be needed. Based on the results of the survey, almost all trainees thought that their own skill in taking intraoral and panoramic radiographs had improved. In addition, the majority of trainees (98.4%) judged that the training was effective, and they were thought to have sufficiently understood the purpose and significance of the training.

 In conclusion, our training course appears to be effective for making improvements in several problem areas.

 Abstract At T College, in addition to the standard three-year course in dental hygiene, an advanced one-year graduate training program in dental specialties is available to students wishing to become leaders in the field of dental hygiene. For educational training in this program, graduate dental hygiene students are given the opportunity to teach infection prevention to female junior and senior high school students in a class called “Practical training for dental examinations and oral health management.” The aim of this study was to clarify the effectiveness of educational training for graduate dental hygiene students. We conducted a questionnaire survey on graduate dental hygiene students regarding their preparation for teaching the infection prevention classes. We also examined their attitudes toward female junior and senior high school students after teaching the class based on self-evaluation. To the best of our knowledge, this is the first study to investigate attitudes among graduate dental hygiene students regarding female junior and senior high school students after teaching a class on infection prevention. In the self-evaluations after the class, all of the graduate students responded that the educational training had been useful. They also recognized the importance of their classes in assessing the reactions of the junior and senior high school students. These results suggest that educational training in an advanced training program can provide graduate students with a meaningful experience and allow them to learn the importance of acquiring not only knowledge, but also teaching skills and behavior.

 Abstract The basic skills required for dentists include using a suitable force for each procedure in addition to dealing with materials appropriately. However, it is difficult to teach force acceleration at the clinical site of dental procedures. Dental students and trainee dentists need to learn about the appropriate force (dental force) from their own study. Ten dental students in the clinical training curriculum and 10 dental instructors participated in the survey. The dental force they used for five dental procedures was measured by a mannequin equipped with a scale under the mandible. Periodontal pocket examination (PPE), gingival retraction (GR), grinding of dental caries (GDC), and mounting of a full metal crown (FMC) and removal partial denture (RPD) were prepared as procedures that require various forces from delicate to relatively high force. The force data were divided into a student group and a dental instructor group and analyzed with statistical methods. The results showed that the student group tended to use larger force than the dental instructors for PPE or GR, but tended to use a smaller force than dental instructors for FMC and RPD mounting. There were significant differences between the two groups in all five procedures. Furthermore, significant differences were found between PPE and GR, and between FMC and RPD in the dental instructor group. It is suggested that the force acceleration used by dentists is closely related to their clinical experience.

 Abstract The aim of this study was to promote safe clinical training by analyzing the incidents reported by trainee dentists at the General Dentistry and Clinical Education Unit, Niigata University Medical and Dental Hospital. Incident reports submitted by trainee dentists from April 2006 to March 2014 were examined. The number, type, patient effect, background and incidence of the incidents were analyzed. A total of 77 incidents were reported by trainee dentists during the 9 years ; 71 were attributed to trainee dentists, and 6 were attributed to trainee dentists and students or instructors together. Fifty-five incidents occurred when trainee dentists were treating patients in a dental practice. The most frequently occurring incidents (26 cases) were soft tissue injuries caused by burs or points powered by an air turbine or motor engine, or a heated instrument. These incidents rated a patient effect level of “3a”. The background of the incidents was related to deficiencies in technical skills, check skills, observational skills, decision-making skills, and knowledge. The number of incidents was calculated as 0.1-0.6 per trainee dentist per year. The incidence was calculated as 0.03-0.43% per dental practice accepting trainee dentists. The frequency of incidents decreased gradually over the study period, suggesting that continuation and improvement of safety management, such as incident reporting and KYT training (hazard prediction activities), are important factors in the future prevention of incidents in post-graduate clinical training.

 Abstract We described the achievements of comprehensive dentistry for post-graduate trainee dentists at Osaka Dental University Hospital between 2006 and 2012.

 For each patient, treatment activities classified by treatment contents were described in a summary table produced using FileMaker Pro^®, and evaluation was performed based on the summary table of each patient.

 Comprehensive dentistry was selected as the treatment form, and treatment was performed by a team of two persons. The largest number of annual postgraduate trainee dentists was 39, and the smallest was 28.

 The number of patients was approximately 1,000 per year, that of consultations was approximately 7,300 per year, and that of annual treatment days was approximately 220 ; therefore, the number of consultations for the trainees was more than 30 per day, and each trainee performed treatment more than twice per day.

 Regarding the classification of treatment activities, the frequency of the initial preparatory treatment for periodontal diseases was very high (800 times per year), and most patients received initial preparatory treatment, such as scaling. The second-most frequent treatment was crown restoration using composite resin (400 teeth per year), whose number was higher than that of treatment using metal inlays and full metal crowns. Regarding endodontic treatment, pulpectomy and infected root canal treatment were performed for approximately 170 teeth per year. For oral surgery, the most frequent treatment was tooth extraction (approximately 325 teeth per year), and anterior tooth extraction accounted for approximately 20%. Concerning defect prosthodontics, approximately 25 complete dentures, 120 partial dentures, and 25 bridges were inserted.

 Although we consider that these are appropriate treatment achievements as clinical training, further evaluation is necessary for improvement regarding the limited number of cases of bridges or surgical treatment other than tooth extraction.