Threadless Dental Implant with Gradient Microporous Structure
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Solution Overview
Problem
Current dental implants face issues such as stress shielding due to mismatched elastic moduli with bone, leading to stress concentration and prolonged healing times, along with complications like bone burns and mechanical failures from threaded structures, and inefficient production processes.
Innovation Solution
A dental implant system with a surface gradient microporous structure mimicking bone trabecular architecture, made using laser 3D printing and powder metallurgy, eliminating central screws and threads, and utilizing diffusion bonding for improved stress distribution and production efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a threaded structure is used for dental implant insertion, then the implant can be securely fixed in the bone, but it causes excessive bone compression, bone burns, and mechanical fatigue leading to breakage
Solution Approach 1:
The patent removes the threaded structure from the dental implant surface, extracting the harmful rotational insertion mechanism that causes bone compression and thermal damage. The implant uses a smooth cylindrical surface for insertion instead, eliminating the source of bone burns and excessive compression while maintaining fixation capability through alternative mechanisms.
Solution Approach 2:
The patent replaces the traditional threaded mechanical insertion system with a smooth surface insertion system. Instead of using threads to engage with bone, the implant relies on a smooth surface that allows for less traumatic insertion and fixation through bone growth into the microporous structure, substituting a harmful mechanical threading action with a more biocompatible approach.
2Ease of manufacture
If the dental implant surface has a smooth structure, then the manufacturing process is simpler, but it fails to achieve proper bone integration and results in stress shielding
Solution Approach 1:
The patent applies a microporous coating layer on the implant surface with controlled pore sizes and distributions. This porous structure promotes bone ingrowth and integration while maintaining manufacturing simplicity through advanced coating techniques. The porous structure eliminates stress shielding by creating a gradient that matches bone mechanical properties and facilitates direct bone-to-implant contact.
Solution Approach 2:
The patent uses a composite structure combining a smooth base surface with a microporous coating layer. This composite approach maintains the simplicity of manufacturing the base implant while adding the functional benefits of bone integration through the porous coating. The combination of smooth and porous surfaces in one structure achieves both ease of manufacture and reliable bone integration.
3Manufacturing precision
If precision CNC machining is used for dental implant production, then manufacturing precision is high, but the production process is long and efficiency is low
Solution Approach 1:
The patent changes the manufacturing approach from traditional precision CNC machining to additive manufacturing (3D printing). This parameter change in the manufacturing process enables complex microporous structures to be created directly without multiple machining steps, significantly reducing production time while maintaining or improving precision through digital design control.
Solution Approach 2:
The patent uses additive manufacturing to create locally optimized microporous structures with varying pore sizes and distributions in different regions of the implant. This allows for tailored bone integration properties in specific areas while maintaining overall manufacturing efficiency, as the entire complex structure is built in one additive process rather than requiring multiple precision machining operations.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The microporous structure enhances bone integration and stability, reduces healing time, minimizes mechanical complications, and simplifies production, while the threadless design prevents bone burns and mechanical failures, enabling faster and more precise manufacturing.
Implementation Method 1
The microporous layer is a bionic bone trabecular structure, and a porosity and a micro-pore size of the microporous layer increase sequentially from inside to outside
Implementation Method 2
The preparation method uses laser 3D printing technology to prepare the microporous layer
Implementation Method 3
The preparation method uses the diffusion bonding to realize the stable combination of the abovementioned two parts
Data Source
AI summary
The invention provides a dental implant system with a surface gradient microporous structure and a preparation method thereof. The dental implant system includes a non-threaded micro-cone cylindrical dental implant and an abutment, wherein the dental implant includes a microporous layer with a bionic bone trabecular structure and a base with extremely high density and mechanical strength. The dental implant system of the invention has both the precision of the internal structure and the bionic characteristics of the surface structure, which effectively improves the long-term stability after implantation, reduces the complexity of the processing process of the dental implant system, and can realize personalized and batch production.