Authorship：Lead author   Language：Japanese   Publishing type：Research paper (scientific journal)  

Language：Japanese   Publisher：(一社)日本接着歯学会  

本研究の目的は,デュアルキュア型レジンセメントで装着されたCAD/CAM用コンポジットレジンクラウンの外面より行う光照射が,初期接着強さに及ぼす光照射の影響を明らかにすることである.CAD/CAM用コンポジットレジンブロックを厚さ2mmに切断して試験片とし,被着面にリン酸処理およびシラン処理を行った.金銀パラジウム合金で製作した剪断試験用ハンドルをレジンセメントにて接着した.初期硬化後に冠外面より光照射した状況を想定し,接着の5分後に光照射を行った.試験片は90枚準備し,照射なし群,照射3秒群,照射20秒群の3群に分けた.ISO/TR 11405に則って,各群の試験片の半分(n=15)は接着操作の1時間後に剪断接着強さを測定し,各群の残り半分(n=15)は接着操作の24時間後に剪断接着強さを測定した.接着操作の1時間後における照射20秒群の接着強さは,他の2群よりも有意に高かった.接着操作の24時間後の接着強さは,すべての群間で有意差はみられなかった.20秒照射群の1時間後と全群24時間後の間に接着強さの有意差は認めなかった.このことから,CAD/CAMコンポジットレジンクラウンの装着時に十分な時間光を照射することにより,高い初期接着強さが得られることが示された.(著者抄録)

Language：Japanese   Publisher：Japanese Dental Education Association  

<p> <b>Abstract</b> As the aging of society in Japan has progressed, the Faculty of Dentistry of Kagoshima University introduced simulation training of the elderly using equipment in the first phase of clinical training in 2020 in order to deepen physical understanding of the elderly. This training is conducted as part of the practice of home-visit dental care simulation training, which has been carried out using a simulator and portable treatment equipment based on a scenario that assumes providing dental treatment at the visiting site. Seven types of equipment were used in the simulation training for the elderly : earmuffs, goggles to simulate the visually impaired, elbow/knee supporters, weight bands for wrists/ankles, and belts for bending forward. We let the dental students experience walking, going up and down stairs, and unlocking a numeric keypad of a door. During the practical training, many students had difficulty going up and down stairs in a stooped posture and with narrowed vision, and they often asked for support from their caregivers, who naturally gave them assistance. In the post-training questionnaire survey, more than half of the students said that their impressions of the elderly had changed after the training. It is thought that actually experiencing the physical burden and hardships that the elderly feel physically in their daily lives was highly significant, and increased the students’ awareness. It is suggested that this training increased understanding of the physical characteristics of the elderly. In the future, we are considering enhancing the training content to raise students’ understanding further.</p>

DOI： 10.24744/jdea.39.2_63

CiNii Research

Language：Japanese   Publisher：Japan Society for Adhesive Dentistry  

<p>The purpose of this study was to evaluate the effect of light irradiation through the outer surface of a CAD/CAM composite resin crown on the initial bond strength of a dual-cure resin cement. A CAD/CAM composite resin block was cut to a thickness of 2 mm as a specimen, and the surface was treated with phosphoric acid and silane coupling agent. Adherend for the shear bond strength test made of silver-palladium-copper-gold alloy was bonded to the specimen with dual-cure resin cement. Assuming a clinical situation, the specimen was irradiated by dental curing light 5 minutes after the bonding procedure. A total of 90 specimens were divided into three groups: group without light irradiation, group with light irradiation for 3 seconds, group with light irradiation for 20 seconds. Half of the specimens in each group (n = 15) were measured for shear bond strength after 1 hour, and the remaining half (n = 15) were measured after 24 hours according to ISO/TR 11405. As a result, the bond strength of the group with light irradiation for 20 seconds was significantly higher than that of the other two groups at 1 hour after the bonding procedure. There was no significant difference in bond strength between all groups at 24 hours after the bonding procedure. There was no significant difference between the bond strength after 1 hour of the group with light irradiation for 20 seconds and the bond strength after 24 hours of all groups. It was shown that high initial bond strength can be obtained by irradiating light for a sufficient time when luting a CAD/CAM composite resin crown.</p>

DOI： 10.11297/adhesdent.41.1_2

CiNii Research

Language：English   Publishing type：Research paper (scientific journal)  

Background:
Mastication has been regarded to play an important role in achieving quality daily life for the elderly. On the occlusal surface of
posterior artificial teeth, parallel grooves of 1 mm depth and 1 mm width with an inter-groove distance of 2 mm have been found to
significantly improve masticatory efficiency on a mechanical simulator.
Materials and Methods:
In the present study, the effect of the grooved design on masticatory efficiency in edentulous subjects using a short-term crossover
trial was evaluated. Six edentulous participants, 1 male and 5 females, were assigned into two groups. One received duplicated
complete dentures with grooved molars first, and the other received duplicated complete dentures with conventional molars first. The
design of the teeth was crossover after evaluating masticatory efficiency. Raw carrot, raw lettuce and mixed foodstuffs were used to
evaluate masticatory efficiency. Subjects were instructed to masticate 20 strokes and arbitrary strokes until they felt like swallowing.
Results:
The number of masticatory strokes taken was significantly smaller using the grooved design (p<.05). Masticatory efficiency analysis
revealed that the grooved design achieved significantly higher masticatory efficiency at 20 masticatory strokes for raw carrot and
mixed foodstuffs (p<.05).
Conclusion:
Results show that compared with conventional lingualized occlusion, the grooved design accomplishes higher masticatory efficiency
in vivo. Considering the distinction of this design that it can be applied to any existing denture occlusion, the design might help
improve the dietary life of the elderly.

Responsible for pages：158-159   Language：Japanese Book type：Scholarly book

Responsible for pages：23-29   Language：Japanese Book type：Scholarly book

Event date： 2021.11 - 2021.12

Presentation type：Poster presentation  

Venue：Web開催  

Event date： 2021.9

Language：Japanese   Presentation type：Poster presentation  

Event date： 2020.11

Language：Japanese   Presentation type：Poster presentation  

Venue：Web開催  

Event date： 2019.6

Language：Japanese   Presentation type：Poster presentation  

Venue：鹿児島大学桜ケ丘キャンパス鶴陵会館  

Language：Japanese