Determination of the Fabricating Conditions for the Preferable Marginal and Internal Adaptation of the Mica Crystal Castable Ceramic Crown

Ukon, Shinichi; Ishikawa, Masatugu; Tohyama, Monica; Sato, Hironobu

doi:10.4012/dmj.23.53

Cited by 9 publications

(7 citation statements)

References 12 publications

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“…There are two methods to measure the deformation of crowns and FPDs. One is to measure the gap between the master die and the restoration [21][22][23][24][25][26] ; the other is to read the three-dimensional coordinates on the reference plane using a three-dimensional coordinate measuring machine or the coordinates at the points defined on the restoration, and then perform vector analysis 27) . The former method is easy in terms of visualizing marginal discrepancies, but it is inconvenient for the measurement of threedimensional helical deformations.…”

Section: Measurement and Analysis Methodsmentioning

confidence: 99%

Accuracy of Temporary Laser Welding of FPDs by Nd:YAG Laser in the Oral Cavity

et al. 2006

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The purpose of this study was to investigate the accuracy of temporary fixation with laser welding for fixed partial dentures（FPDs） . Five kinds of experimental FPD with different welding/soldering gaps were fabricated（0, 20, 50μm for welding; 300μm for soldering） . Then, FPDs were temporary-fixed by laser welding or with a self-curing resin. Fixation accuracy was evaluated by the change in distance and the angular deformation between two retainers. The change in distance and the angular deformation between two retainers of the FPD without welding/soldering gap were significantly larger than the other FPDs（p＜0.05） . With due consideration to the displacement of teeth or implants especially in the mesiodistal direction, and by taking into account the inevitable errors of the indirect method, it seemed reasonable to provide a welding space of approximately 20μm.

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Section: Measurement and Analysis Methodsmentioning

confidence: 99%

Accuracy of Temporary Laser Welding of FPDs by Nd:YAG Laser in the Oral Cavity

et al. 2006

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“…In light of this clinically acceptable range, the CAD/CAM crowns fabricated in this study were considered clinically safe and applicable [18][19][20][21][22][23][24] .…”

Section: Influence Of Step-overmentioning

confidence: 99%

Machining Accuracy of Crowns by CAD/CAM System Using TCP/IP: Influence of Restorative Material and Scanning Condition

et al. 2007

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The purpose of this study was to determine the optimal condition for fabricating accurate crowns efficiently using an internet-based CAD/CAM system. The influences of three different CAD/CAM restorative materials (titanium, porcelain, and composite resin) and three different step-over scanning distances (0.01 mm, 0.11 mm, and 0.21 mm) were evaluated, and their interactive effects were carefully examined.Several points on the inner and outer surfaces of machined crowns -as well as height -were measured. These measurements were then compared with the original models, from which machining accuracy was obtained. At all measuring points, the inner surface of all crowns was machined larger than the die model, whereas the cervical area of porcelain crown was machined smaller than the crown model. Results of this study revealed that a step-over distance of 0.11 mm was an optimal scanning condition, taking into consideration the interactive effects of scanning time required, data volume, and machining accuracy.

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“…Considera-se, porém, que clinicamente a espessura do cimento é muito menor que a testada, tendo no máximo 120 µm (Ukon et al, 2004;Freire et al, 2016). A espessura de 0,5mm para amostras do grupo controle dos Cimentos foi escolhida, pois, apesar de ser bem maior do que a linha de cimentação produzida pelo cimento durante a cimentação dos laminados cerâmicos, essa seria a espessura mínima capaz de permitir colher resultados confiáveis para analise da cor das amostras (Silami et al, 2016;.…”

Section: Discussionunclassified

“…Os valores de linha de cimentação mensurados neste estudo, variaram de 24µm à 85µm, sem diferença entre os cimentos resinoso utilizados na pesquisa. Para cimentação realizada com cimentos resinosos esses valores são considerados "clinicamente aceitáveis", podendo a linha de cimentação medir até 120µm(Ukon et al, 2004, Freire et al, 2016.Discussão | 109 translucidez nos grupos restaurados quando usada a ciclagem termomecânica como um método de envelhecimento. A simplificação da cimentação com cimentos autoadesivos, visando melhorar a sensibilidade técnica é uma inquestionável conquista.…”

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Influência dos cimentos resinosos e sistemas cerâmicos na translucidez e estabilidade de cor de restaurações laminadas

Silami¹

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pelos maravilhosos momentos compartilhados dentro e fora das salas de aula, pela amizade e carinho que sempre tiveram comigo. À minha querida equipe do LaABio, Profa. Fernanda, Marta Contente, Sérgio Vicente e Rafaella Tonani obrigada pela acolhida, pelo carinho, pelo estudo, pela troca de experiências e pelos momentos de descontração em nosso dia a dia. Vocês são pessoas especiais e merecem todo meu respeito e admiração, além de muito sucesso. A toda minha Família, irmãos (a), avós, tios(a), sobrinhos(a), cunhados(a), minha madrasta e minha sogra que estão sempre torcendo por mim. A todos que direta ou indiretamente contribuíram para a realização deste trabalho. Meu eterno agradecimento, Deus os abençoe sempre! Resumo SILAMI, F.D.J. Influência dos cimentos resinosos e sistemas cerâmicos na translucidez e estabilidade de cor de restaurações laminadas. 2017. 162p. Tese

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Determination of the Fabricating Conditions for the Preferable Marginal and Internal Adaptation of the Mica Crystal Castable Ceramic Crown

Cited by 9 publications

References 12 publications

Accuracy of Temporary Laser Welding of FPDs by Nd:YAG Laser in the Oral Cavity

Accuracy of Temporary Laser Welding of FPDs by Nd:YAG Laser in the Oral Cavity

Machining Accuracy of Crowns by CAD/CAM System Using TCP/IP: Influence of Restorative Material and Scanning Condition

Influência dos cimentos resinosos e sistemas cerâmicos na translucidez e estabilidade de cor de restaurações laminadas

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