インプラントで支える単一クラウンに対するセメント施用技術の影響
Hsiang Chih Yeh1, Xuedong Bai2, Yanning Chen3
1Taught postgraduate student, Paediatric Dentistry, Faculty of Dentistry, The University of Hong Kong, Hong Kong Special Administrative Region, PR China.
Journal of dentistry
|September 1, 2025
まとめ
チェアサイドコピーアブートメント (CCA) によるプレシッティング技術では,セメントが少なく,インプラントのクラウンにはセメントの薄膜が使用されます. しかし,テストされたすべてのセメント適用技術は,比較可能なクラウン保持力を維持しました.
科学分野:
- 歯科 材料 科学
- バイオ材料工学
- 義歯科
背景:
- シメントで固定されたインプラントの 過剰なセメントは 合併症を引き起こす可能性があります
- インプラントの修復を成功させるには シメントの施術の最適化が不可欠です
研究 の 目的:
- シメントの重量,薄膜の厚さ,保持力に対する4つのセメント塗装技術の影響を評価する.
- インプラントを支える単体クラウンをセメントにするための最も効果的なテクニックを特定する.
主な方法:
- タイタンの支柱に付いた32個のリチウム脱シケートクラウンを,クラウンマージン (MA),クラウンブラッシュ (BA),クラウングロース (GA),椅子側コピーの支柱 (CCA) でプリシートした.
- セメントの重量と薄膜の厚さ (マイクロCT) を測定し,牽引力試験によって保持力を評価した.
主要な成果:
- CCA技術は,MA,BA,GAと比較して,かなり少ないセメント (20.16 ± 2.39 mg) を使用しました.
- BAテクニックにより,セメントの薄膜の厚さが (187.06 ± 23.77 μm) 大きく増加した.
- 4つのグループでは,冠の脱出力や故障モードの有意な差異は観察されなかった.
結論:
- シメントの適用技術は,シメントの重量と膜の厚さに大きく影響するが,インプラントで支えられた単一の冠の保持力には影響しない.
- シメントの使用量が減り,臨床効率が最適であるため,CCAテクニックは,インプラントサポートされたクラウンをセメント化するために推奨されます.
- 解剖学的な冠の保持試験のための新しいモデルが開発されました.
関連する概念動画
Types of Cement I
184
Portland cement comes in several types, each with distinct properties and applications based on their chemical composition and hydration characteristics:
Type I (Ordinary Portland Cement) is widely used for general construction where special properties are not required. It has moderate sulfate resistance and heat of hydration.
Type II (Modified Cement) offers moderate resistance to sulfate attack and a lower rate of heat development compared to Type I. It is suitable for structures in...
Type I (Ordinary Portland Cement) is widely used for general construction where special properties are not required. It has moderate sulfate resistance and heat of hydration.
Type II (Modified Cement) offers moderate resistance to sulfate attack and a lower rate of heat development compared to Type I. It is suitable for structures in...
184
Hydration of Cement
380
Hydration of cement is a chemical reaction between cement particles and water. This process occurs primarily through two mechanisms: through-solution and topochemical. In the through-solution process, anhydrous compounds dissolve into their constituents, hydrates form in the solution, and then precipitate from the supersaturated solution. The topochemical process involves solid-state reactions at the cement particle surface. The through-solution process dominates the topochemical process at the...
380
Strength of Cement
214
Strength tests for cement are not performed directly on neat cement paste due to difficulty in obtaining consistent, reliable specimens. Instead, cement is typically tested in the form of cement-sand mortar.
For compressive strength tests, ASTM C 109-05 standards prescribe a cement-sand mix ratio of 1:2.75 and a water/cement ratio of 0.485 for making 2-inch cubes. These cubes are mixed, cast, and cured in saturated lime water at 23°C until testing. Flexural strength testing, outlined in...
For compressive strength tests, ASTM C 109-05 standards prescribe a cement-sand mix ratio of 1:2.75 and a water/cement ratio of 0.485 for making 2-inch cubes. These cubes are mixed, cast, and cured in saturated lime water at 23°C until testing. Flexural strength testing, outlined in...
214
Setting Time of Cement
275
The setting time of cement refers to the process of cement paste transitioning from a plastic state to a solid state. This process is crucial in construction as it dictates the timeframe for concrete placement, compaction, and finishing. The onset of this solidification is termed the initial set, indicating when the paste becomes unworkable. The final set is when the paste has solidified completely, and further handling or manipulation can no longer affect its shape. The cement strength is...
275
Types of Cement II
166
Portland blast-furnace cement is made by blending Portland cement clinker with granulated blast-furnace slag, which accounts for 25 to 65 percent of the cement's weight. Despite its similarities to ordinary Portland (Type I) cement in terms of fineness and setting times, its early strength is lower, though it achieves comparable strength later on. It's particularly suited for mass concrete structures and marine environments due to its lower heat of hydration and superior sulfate...
166
Soundness of Cement
233
The soundness of cement refers to the ability of cement paste to retain its volume after setting. Unsound cement can lead to expansion and structural damage due to the presence of free lime, magnesia, and calcium sulfate. Free lime hydrates very slowly, expanding and causing unsoundness, which is difficult to detect because it intercrystallizes with other compounds. Magnesia also reacts with water, forming crystals that can disrupt the cement's structure. Calcium sulfate can create...
233


