The aesthetic consciousness of patients has been improved in last few years. Because of pulp protection and tooth treatment, the laminate veneer restoration is needed to be very thin restoration material. As a first step, We examined influences of color by the thickness of porcelain in this experiment before examining the influence to the color of restoration materials by that of resin cement at attachment of laminate veneer restoration.
The colors were measured by Spectrophotometer with three different types of porcelains (Crown Porcelain, Abutment Porcelain and Masking Porcelain).
The results are the following:
1.The color differences were easy to find between the thickness of 0.6mm and 1.4mm for L* with Crown Porcelain.
2.Color differences were easy to find the thickness under 1.5mm for L* with Crown Porcelain in both A2 and A3.
3.The color differences were easy to find between the thickness of 0.5mm and 1.0mm for b* with Crown Porcelain.
4.When L* was higher level with Abutment Porcelain, a* was lower level with Abutment Porcelain. When L* was lower level with Abutment Porcelain, a* washigher level with Abutment Porcelain.
5.When the color was darker with Abutment Porcelain, L* become lower level with Abutment Porcelain. When the thickness was increased with Abutment Porcelain,L* become lower level with Abutment Porcelain as well.
6.The ratio of the transmittance for Masking Porcelain is around 30% to 50% under clinical use.

View full abstract

In generally speaking, it is no measuring the effect of before and after oral rehabilitation by parameter depended on EBM(Evidence Based Medicine). From point of view primary health science, it has to present the meaning that dental practice contributes to total health up grade by the Saliva ORP.
So it is to establish Global Dental Standard like blood sugar and Hb a1c in diabetes mellitus by the Saliva ORP as a parameter depended upon EBM.
In this paper, it is proposed that Saliva ORP is so efficient method to evaluate the oral rehabilitation by the total health grade.

View full abstract

Arrangement of artificial tooth dynamically considered is important for stability of complete denture. First, we arranged artificial tooth from upper posterior along with pound line as a reference, then we have examined methods to determine the suitable position of denture occlusion. In this study, we examined the effect on arrangement of artificial tooth on palate capacity with our methods. Nine different types of hard resin tooth were used. The combination of anterior tooth and posterior tooth was conducted by each manufacture's instruction. Lingualized occlusion was given arrangement. Palate capacity was measured by weight of water and three-dimensional scanner. Also, complete denture was measured at each side of parts with electronic digital calipers.
As a result of this experiment, we suggested the followings:
1)Capacity of the palate on complete denture can be measured by weight of water.
2)Posterior tooth arrangement can be affected by dental arch width of anterior tooth.
3)The effect on palate capacity of complete denture at anterior tooth is larger thanthe position at posterior tooth.

View full abstract

Ultrasound therapy is a form of mechanical energy administered to an organism as high frequent acoustical pressure waves.
Several investigations have established the stimulatory effect of low-intensity ultrasound treatment on osteogenesis and fracture healing.
The positive influence of low-intensity ultrasound treatment on fracture healing has been demonstrated in animal experiments as well as in clinical trials.
The consequence which suggested availability of Low-intensity ultrasonic therapy by study about the bone regeneration acceleration which we used ultrasound for in animal experiment was obtained formerly.
We apply Low-intensity ultrasonic therapy to some cases for implants treatment and report it because interesting results were obtained clinically.

View full abstract

In recent years, Implant treatment has been recognized to be a predictable treatment of defect prosthetic, defect prosthetic treatment using implants has become much more familiar to the general practice.
However, implant position and ossein, bone density, power of healing is not uniform through a period of integration, it becomes accident and not to integration with the patient's problems if moving to the prosthetic treatment by judging only clinical senses such as inspection, palpation, and percussion sound and standard healing.
Periotest have ways to prevent such accidents. Periotest is more convenient to confirm the primary stability and integration, which can be diagnosed more reliably measuring device.
The Periotest in the literature for some numbers are not stable and integration is broken by hammering there is a negative feedback,but it had the feeling like its not really try to use.
We report devices that can be used with confidence for diagnostic equipment integrations and should be noted for measurement by examining the reproducibility of the Periotest measurement.

View full abstract

We often encounter the situation that a few remaining teeth are left, which are more or less hopeless, to begin a full-arch implant therapy. In this case report, serial extraction protocol was applied to finish the full-arch implant /tooth restoration. In this type of therapy protocol with such as bilateral sinus lift and anterior ridge augmentation, its treatment period can be lengthy, so that a fixed provisional restoration is often necessary to maintain acceptable function and esthetics for the patient. We have augmented the anterior narrow ridge by using block graft and ridge expansion technique in two stages, which enabled successful implant placement later on.
Moreover, complexity of a full arch restoration in a patient with high smile line by using pink porcelain will be mentioned in this article.

View full abstract

In this article, we will discuss the dental hygienist images as life-works, through a case with mild periodontitis and bruxism(clenching) that involved difficulty in self-care dueto a strong vomiting reflex, and we realized the importance of supportive periodontal therapy(SPT).
Our country faced a super-aged society from 2007. It was reported that the ratio of the adults who have 20 teeth or more than 20 increased greatly over the past 30 yearsaccording to National dental Surveys in 2005. Recently, the ratio at the age of 80 or more exceeds 25%. However, the number of functioning teeth is relatively few in elderly, therefore, large number of them can not masticate properly, the improved consideration of public health in community.
SPT that can be performed by dental hygienist induces the preservation of teeth as well as keeping teeth in function. Therefore, this therapy is very important forimprovement of quality of life( QOL).

View full abstract

[in Japanese]

View full abstract

[in Japanese]

View full abstract

[in Japanese]

View full abstract