There are some spaces between abutment and implant body which can be a reservoir of toxic substance, they penetrate into subgingival space from microgap at the implant–abutment interface. This penetration may cause periimplantitis is known to one most important factors associated with late failure. In present study, three kinds connection system, external parallel (EP), internal (IP), conical (CC), were studied viewpoint microleakage gap in loosening screw. We observed dye leakage screw hole...

Objective This study assessed whether patients with potentially preventable emergency admissions had limited access to outpatient care immediately before admission and they received appropriate during their visits. Design Retrospective observational study. Setting Linked inpatient records obtained from a nationwide claims database in Japan. Participants Patients who experienced for ambulatory care-sensitive conditions between April 2005 March 2020. Patient regional characteristics were...

Magnetic bearings (MBs) are useful for suspending the rotor shaft of a high-speed, high-output motor because they can do so without mechanical contact. In [2], we have proposed three-axis active-control-type MB (3-axis AMB) with cylindrical whose diameter is equal to that radial (RMB) or motor. The 3-axis AMB integrates an RMB and thrust in one unit. However, assembly conventional complex, iron loss large. Thus, order simplify reduce loss, this paper discusses novel structure which small...

A bearingless motor (BelM) integrates the characteristics of an electric and a magnetic bearing. Typically, surface-mounted permanent magnet (SPM)-type BelM with ring magnetized in parallel is employed for high-speed operation. It noteworthy that carbon fiber bandage needed to fix magnet. However, when SPM-type applied high-output motor, it becomes difficult generate sufficient suspension force because wide gap arising from In addition, manufacturing cost large-scale high. Therefore, realize...

Stress distribution in peri-implant bone an edentulous maxilla following delayed and immediate loading implant the effect of length on maximum stress were evaluated by using two kinds finite element analyses. A threaded was loaded with a 100 N vertical force, either immediately or delayed, examined analysis simple contact relation bonding interaction between bone, respectively. Higher stresses observed cortical around neck trabecular threading model. The model dramatically higher than...

A magnetic bearing (MB) can suspend a rotor shaft with noncontact, so the MB has been used for high-output and high-speed machines. In general, heteropolar-type structure is used, because of its simple low cost. However, heteropolartype problem in terms iron loss caused by an alternating field on core. On other hand, general homopolar-type dc as complicated needs large magnet generating bias flux, it becomes costly. Therefore, this paper discusses novel unifying four C-shaped cores high...

A bearingless motor (BelM) integrates the characteristics of an electric and a magnetic bearing. Typically, surface-mounted permanent magnet (SPM)-type BelM with ring magnetized in parallel is employed for high-speed operation. It noteworthy that carbon fiber bandage needed to fix magnet. However, when SPM-type applied high-output motor, it becomes difficult generate sufficient suspension force because wide gap arising from In addition, manufacturing cost large-scale high. Therefore, realize...

This retrospective study aimed to investigate the survival rate of implants from 5 10 years after placement implant-supported fixed dental prostheses (ISFDPs) and management implant loss in elderly population. Elderly patients (≥65 old) who had been treated with ISFDPs followed up for at least between October 2009 March 2020 were enrolled. Patient profiles implant-related data extracted. The as well 10-year cumulative evaluated. prosthetic interventions also investigated. In total, 195 (mean...

A bearingless motor has integrated characteristics of an electrical and a magnetic bearing. In general, surface permanent magnet (SPM) type rotor structure with ring magnetized in parallel is employed high-speed PM motors. However, case increasing size for high output, this problems insufficient suspension force due to wide air gap cost by using the large-diameter parallel. Therefore, paper discusses novel interior (IPM) high-output motor. IPM structure, ripple suppressed means arranging...

A number of finite element analyses (FEAs) for the dental implant were performed without regard preload and with all interfaces ‘fixed-bonded’. The purpose this study was comparing stress distributions between conventional FEA model contacting ‘fixed-bonded’ (bonded model) components in ‘contact’ friction simulated as a preloaded (contact model). We further verified accuracy result using experiment. In contact model, more widely distributed than bonded model. From study, induced by screw...

1989~94年にかけて熊本県が県下全域で行った地下水の水質調査の結果.県北に位置するU町に地下水中の硝酸性窒素濃度の高い地点が多くみられた.このため.1995~96年度に地下水の水質調査を行った結果.地下水中の硝酸性窒素濃度と窒素同位体比との関係から調査地点を4つのグループに分類することができた.各グループの硝酸性窒素の供給源について考察した結果.調査地点の大部分が含まれたグループの汚染は化学肥料の溶脱に起因すると考えられた.土地利用別土壌溶出液中の三態窒素(硝酸性窒素.亜硝酸性窒素及びアンモニア性窒素)濃度調査の結果.ハウス及び露地畑土壌により多くの硝酸性窒素が残留し.地下深層まで達していた.U町の各窒素供給源からの地下への窒素浸透量を試算したところ.畜産及び施肥からの窒素浸透量が大きく.特に畑作物への施肥の影響が大きいものと推察された.

We fabricated a novel device assembled by coupling transparent organic light-emitting diode (TOLED) and glare-tunable electrochemical device. This could be operated in six different states, namely, (1) transparent, (2) mirror, (3) black, (4) dual emission, (5) single-side emission with (6) black. Switching between each of these states tuned varying/selecting the applied DC bias voltage. The showed 63.8% transmittance state, 42.1% reflectance mirror state at 700 nm. Transmittance both black...

Abstract In additive manufacturing, indirect laser sintering is used to process and fabricate ceramic materials using a polymer–ceramics green body. The mechanical strength of the body important hold shape enable use with low power density during process. Because microstructure will considerably affect final product, this study demonstrated feasible controlled formation Poly (methylmethacrylate) (PMMA)–Al 2 O 3 composite particles by an electrostatic assembly method that was for fabrication...

Physical properties were examined about Aso volcanic ash soil which is considered to be the origin of Kuroboku in Kumamoto prefecture. It revealed that low Al2O3 ratio means its capability becoming "active Al", and large pore size small specific surface area. The adsorption ammonium phosphate ions on accompanying elution constituent elements by passing a NH4H2PO4 solution (1-3300μg/ml) through column (10 cm diameter 75 long) sample. adsorbed amounts NH4+ PO43- 0.042 0.688 mg/g, respectively....

インプラント治療は，表面性状の改善や埋入プロトコルの確立に伴い予知性が高い治療となってきたが，一方で破折や骨吸収などの偶発症も報告されている．これらについては様々な要因が報告されているが，機能負荷が開始されてからのオーバーロードを主な原因とするという文献が散見される． そこで，オーバーロードと偶発症について文献レビューを行い，偶発症をもたらす様々なリスクファクターについて整理し，考えられる対策について考察した．本論文で整理したリスクファクターを有する患者へのインプラント治療に際しては，インプラント体の埋入以前から綿密なシミュレーション，補綴設計の工夫を行う必要がある．

A bearingless motor is characterized by integration of an electrical and a magnetic bearing. Electromagnetic force generated the bearing function can realize suspension rotor shaft without mechanical contacts. Principal authors have been proposing non-contact canned pump using motor. This has no expendable parts, such as seals, bearings lubricant. Therefore, it next advantages; 1. clean liquid sending. 2. maintenance free 3. longer operating life. 4. high chemical resistance. The previous...

With the progress of CT machines, image-based finite element simulation is becoming a useful tool for oral biomechanics research. The authors have so far presented microscopic stress evaluation peri-implant trabecular bone based on precise micro-CT images. This paper discusses possibility applying cone beam (CBCT) images, which used dental diagnosis real patients, to simulation. Although severe artifact was seen in CBCT it removed carefully. comparison some representative dimensions between...

廃棄物最終処分場の最も安全性が必要な部位として,遮水層があげられる.この遮水層には,フェールセーフの思想を取り入れたベントナイト混合土が用いられる場合が多くなってきている.遮水層の性能は透水係数で要求されるが,今まで一般的には,透水係数そのものよりも施工時の密度や含水比による間接的な品質管理が実施されてきた.処分場の安全性を直接評価するには,このような間接的な方法よりも,透水係数そのもので直接的に評価すべきである.そこで,サンプラそのもので透水試験が実施可能な簡易現場透水試験装置を開発し,直接的に透水係数を求めることを検討した.

In the use of dental implant, a conebeam CT will be frequently utilized to capture 3D structure human mandible. However, question arises concerning accuracy images not only for cortical bone but also trabecular bone. this study, comparison between and micro has been carried out same mandible by means finite element stress analysis. The position, angle depth single implant were determined thickness distance blood vessels. numerical results, difference displacement was less than 10%....

In the use of dentalimplant, a conebecm CT will be frequently utilized to capture 3D structure af hmnan mandible. However, question arises concerning accuracy conebeam images not only for cortical bone but also trabecular bone. this study, comparison between conebearn and micro has been carried out same human mandible by means finite element stress analysis. The position, angle depth single implant were determined thickness distance blood vessels. Then, numerical results in coincidence CT,...

Pollution of groundwater and soil caused by volatile organic chloride such as trichloroethylene (TCE) is normally detected measurement the groundwater, but a pollution source range could not be specified only groundwater. A gas investigation detection tube method detects components contained in surface layer utilizing high volatility TCE, are estimated. Here, performed points estimated considering ground water science geochemical examination tetrachloroethylene (PCE). PCE polluted district...