类似于钻石的碳涂层减少了连接螺丝头在多次紧紧的情况下脱落
Francesco Pera1, Byung Chan Kim2, Paolo Pesce3
1Department of Surgical Sciences, CIR Dental School, University of Turin, Turin, Italy.
The Journal of oral implantology
|April 5, 2024
概括
植入螺丝上的钻石状碳 (DLC) 涂层通过防止螺丝头磨损和扭曲来提高耐用性. 这种表面处理对于在牙科修复中保持植入物 - 支架关节的稳定性至关重要.
科学领域:
- 生物材料工程 生物材料工程
- 牙科植入物学 牙科植入物学
- 机械工程 机械工程
背景情况:
- 植入物-关节的稳定性对于成功的牙科植入物康复至关重要.
- 螺丝松动,骨折和头部变形是常见的机械并发症.
- 表面处理,如钻石状碳 (DLC) 涂层,可以提高螺丝的耐用性.
研究的目的:
- 为了评估DLC涂层对植入物螺丝头的影响.
- 评估DLC涂层对螺丝拆除扭矩和螺丝头剥离的影响.
- 为了研究经过重复的拉紧和松动周期后的表面修改.
主要方法:
- 测试了100个植入物螺丝:50个未涂层 (第一组) 和50个DLC涂层 (第二组).
- 螺丝被拉紧到25Ncm,并被解10次,在每个循环后测量移除扭矩.
- 在测试前和测试后,光学3D测量评估了螺丝头表面的修改.
主要成果:
- 在两组中,反向扭矩值随着重复循环而下降,两组之间没有显著差异.
- 与未涂层螺丝 (0.0357毫米) 相比,DLC涂层螺丝的表面尺寸变化显著较小 (0.02312毫米) (P < .001).
- DLC涂层有效地防止了螺丝头扭曲和多次紧固周期后的磨损.
结论:
- DLC涂层显著减少了植入物螺丝头的磨损和扭曲.
- 这种表面修改提高了植入螺丝的耐用性,特别是在重复的机械应力下.
- DLC涂层是一种有前途的策略,可以提高牙植入物组件的长期机械稳定性.
相关概念视频
Frictional Forces on Screws
1.2K
Screws are characterized by a helical ridge known as a thread wrapped around a cylindrical shaft. They are commonly used as fasteners to hold objects together or to transmit power and motion in machines. One type of screw that is particularly useful for transmitting power is the square-threaded screw.
A jack with a square-threaded screw is a mechanical device used to lift heavy loads by applying a force at its handle. When the force is applied, the screw turns, raising the load. The screw can...
A jack with a square-threaded screw is a mechanical device used to lift heavy loads by applying a force at its handle. When the force is applied, the screw turns, raising the load. The screw can...
1.2K
Wood Fasteners
93
In wood construction, fasteners are essential for securing components together, with the connection strength largely dependent on the direct bearing between members. Various types of fasteners are employed, each suited to specific applications and structural requirements.
Nails are the most common fasteners, consisting of sharp-pointed metal pins that are driven into wood using a hammer or a mechanical nail gun. They come in a variety of diameters, heads, and lengths. Nailing techniques include...
Nails are the most common fasteners, consisting of sharp-pointed metal pins that are driven into wood using a hammer or a mechanical nail gun. They come in a variety of diameters, heads, and lengths. Nailing techniques include...
93
Screw: Problem Solving
415
In mechanical engineering, the interaction between a threaded screw shaft and a plate gear involves analyzing the resisting torque on the plate gear that can be overpowered when a specific torsional moment is applied to the shaft. To better comprehend this concept, consider a generic situation with a threaded screw shaft with a given mean radius and lead and a plate gear with a specified mean radius. The coefficient of static friction between the screw and gear is also provided.
To evaluate the...
To evaluate the...
415
Self-Locking Screw
1.6K
A square-threaded screw jack is a mechanical device widely used for lifting heavy loads or applying considerable force. One of the key features that can make a screw jack more effective and reliable is its self-locking capability.
A square-threaded screw jack carrying a load is considered self-locking if the screw retains its position even after the moment applied to it is removed.
A square-threaded screw jack carrying a load is considered self-locking if the screw retains its position even after the moment applied to it is removed.
1.6K
Steel Fastening Techniques
147
Steel sections can be joined together through various fastening techniques including riveting, bolting, and welding, each suitable for different structural requirements and conditions.
Rivets are cylindrical steel fasteners with a specially designed head. During application, rivets are heated until white-hot and then inserted through pre-drilled holes in the steel sections. A pneumatic hammer is used to shape the exposed end into a second head, securing the sections together.
Bolting is another...
Rivets are cylindrical steel fasteners with a specially designed head. During application, rivets are heated until white-hot and then inserted through pre-drilled holes in the steel sections. A pneumatic hammer is used to shape the exposed end into a second head, securing the sections together.
Bolting is another...
147


