Tapered Dental Implant Abutment Structure for Screw Stability
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Solution Overview
Problem
The existing dental implant structures suffer from gaps between the abutment screw and abutment, leading to distortion and loosening due to repetitive chewing, which can result in the abutment screw fracturing and necessitate replacement.
Innovation Solution
The abutment and connection screw section are designed with tapered shapes to eliminate gaps during fastening, ensuring a secure fit and minimizing loosening through corresponding tapered sections and grooves.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the abutment screw and abutment are connected using conventional structures, then the connection can be established, but gaps occur between the two components leading to distortion and loosening under repetitive chewing forces
Solution Approach 1:
The patent applies tapered (conical) geometry to the connection interface between the abutment screw and abutment. The abutment screw has a tapered outer surface that fits into a corresponding tapered hole in the abutment, eliminating gaps through the curved/tapered contact surface. This conical geometry ensures continuous contact and prevents the gap formation that occurs with conventional cylindrical connections under repetitive loading.
2Stability of the object's composition
If the abutment and connection screw section are fastened without a gap, then distortion is prevented, but the manufacturing precision requirements increase
Solution Approach 1:
The tapered geometry provides self-aligning and self-centering characteristics during assembly. The conical surfaces naturally guide the components into proper alignment, reducing the sensitivity to manufacturing tolerances compared to precision cylindrical fits. The tapered shape allows for gradual engagement and distributes manufacturing variations across the contact surface, making the system more tolerant to precision variations while still achieving gap-free connection.
3Ease of manufacture
If conventional cylindrical connection structures are used, then manufacturing is simpler, but the connection loosens under repetitive chewing forces
Solution Approach 1:
The tapered connection structure prevents loosening by creating a wedge effect under axial loading. The repetitive chewing forces generate radial components that press the tapered surfaces together, increasing friction and preventing screw rotation and loosening. This self-tightening mechanism is inherent to the tapered geometry and works automatically under functional loading, providing superior reliability without complex additional features.
Solution Approach 2:
The tapered geometry pre-positions the components in a locked state during assembly. As the abutment screw is inserted and tightened, the tapered surfaces establish immediate contact and create pre-compression that maintains the gap-free connection. This preliminary positioning action ensures that the connection starts in a stable, gap-free state that resists loosening throughout the service life.
Data Source
AI summary
The present invention relates to a dental implant structure for preventing the sinking of the dental implant superstructure and preventing the loosening of the abutment screw, and in particular, relates to a dental implant structure for preventing the sinking of the dental implant superstructure and preventing the loosening of the abutment screw that, by ensuring that the abutment and the connection screw section are fastened without a gap, prevents a distorting phenomenon of the abutment's interior, despite repeated chewing. In the present invention, since the abutment and the inside of the abutment are each formed in a tapered shape and the connection screw section is fastened to the abutment without a gap between the two when the connection screw section is fastened, the distorting phenomenon of the inside of the abutment can be prevented, even with repeated chewing. Moreover, since the abutment and the inside of the abutment are each formed in a tapered shape, the loosening phenomenon of the connection screw is minimized, even with repeated chewing.