The University of Osaka · Dentistry
Professor Tamaki Nakano's research lab specializes in prosthodontic and implant-related biomechanics, focusing on the clinical and mechanical factors influencing dental implant success and aesthetics. Key research directions include the impact of implant-abutment connection types, emergence angles, and inter-implant distances on peri-implant bone maintenance and soft tissue stability. The lab employs advanced techniques such as three-dimensional finite element analysis and CBCT superposition to evaluate long-term outcomes and optimize implant design and placement. Their work also investigates material-specific performance, particularly the fracture resistance of zirconia abutments and the role of titanium bases in enhancing durability under oral loading conditions.
Figures are computed from collected data and may differ slightly.
Liquid on the tooth surface could affect intraoral scanning accuracy. Blow-drying with a three-way syringe can reduce scanning errors.
As a result of multivariate analysis, our findings suggest that to reduce MBL from the perspective of prosthodontic factors it is preferable to use an implant with a taper joint connection positioned with an emergence angle of 20° to 40°.
The attainment of a good aesthetic outcome in dental implant treatment requires inter-implant papilla reconstruction, which is very difficult to perform. Maintenance of the inter-implant bone is essential for maintenance of the inter-implant papilla. The aim of this study was to investigate the mechanical influences of the implant-abutment connection type and inter-implant distance on the inter-implant bone by using three-dimensional finite element analysis. Three computer-aided design models of
The results of our CBCT superposition method indicated that immediate implant placement can be considered in patients with facial alveolar bone dehiscence. However, there may be a higher risk of gingival recession with wide or deep dehiscence.
Dental implants with tapered conical connections are often combined with zirconia abutments for esthetics; however, the effect of the titanium base on the implant components remains unclear. This study evaluated the effects of a titanium base on the fracture resistance of zirconia abutments and damage to the tapered conical connection implants. Zirconia (Z) and titanium base zirconia (ZT) abutments were fastened to Nobel Biocare (NB) implants and Straumann (ST) implants and subjected to static l
In the regular diameter system, abutment material had no significant influence on the tested mechanical property degradation after simulated long-term oral use. The mechanical performance of narrow diameter one-piece zirconia abutments differed from the other two materials. For optimal performance, one-piece zirconia abutments should be adopted only in anterior regions.
The clinical requirement for a good esthetic result for immediate implant placement is the absence of dehiscence in the anterior facial alveolar bone. In the presence of dehiscence, it is recommended to use a connective tissue graft in addition to immediate implant placement or to change to early implant placement. However, the literature focusing on dehiscence is scarce, and the influence of different placement times and combined use of connective tissue graft on postoperative esthetics in case
Keratinized mucosa width ≥1.5 mm was associated with a higher probability less hard and soft tissue recession around the platform switching implant after 1 year from superstructure placement.
アンテリアハイパーファンクションシンドロームとは，上下顎臼歯部の咬合支持がなく，残存している下顎前歯部が過大な咬合力を生み出すことにより生じる現象である．そのような症例においては安定した強固な臼歯部の咬合支持の回復と前歯部に加わる咬合力のコントロールが重要である．そのためにインプラントを用いた補綴治療は非常に有効な選択肢の一つである．しかし，たとえインプラントを用いてもインプラント体や上部構造にトラブルを引き起こす可能性もあることから，その補綴設計や咬合状態のチェックは注意深く行わなければいけない．
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