フェルールの設計と歯内治療歯の耐破折性

Ferrule design and fracture resistance of endodontically treated teeth.

抄録

この研究では，さまざまなフェルール設計と歯冠構造量を有するパルプレス歯の破壊抵抗を評価した．歯冠縁上1mmの歯冠構造は歯内治療歯の破折抵抗を大幅に増加させたが，歯とコアの接合部または歯冠縁のいずれかにコントラベベルを設けても効果はなかった．歯冠縁の軸方向歯質の厚さは，破折に対する抵抗性を顕著に改善しなかった．

This study evaluated the fracture resistance of pulpless teeth with various ferrule designs and amounts of coronal tooth structure. One millimeter of coronal tooth structure above the crown margin substantially increased the fracture resistance of endodontically treated teeth, whereas a contrabevel at either the tooth-core junction or the crown margin was ineffective. The thickness of axial tooth structure at the crown margin did not appreciably improve resistance to fracture.