Custom Implant Guides for Precise Bone Placement With Less Tissue Damage
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Solution Overview
Problem
Current methods for implant placement in bone surgery often cause damage to the implantation site due to subtractive preparation techniques, leading to weakened tissue and increased reliance on bone grafts, especially in patients with osteoporosis or other bone-weakening conditions, and result in inaccuracies and high costs.
Innovation Solution
The development of implantable objects and guiding devices that are custom-produced based on CAT scan data, featuring smooth surfaces and bone-engaging elements like macro-rough surfaces or grooves, along with recipient site preparation instruments that use additive or subtractive methods to minimize damage and ensure precise placement, and the use of adhesive compositions like multivalent metal salts and acidic compounds for secure implantation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If subtractive preparation methods (drilling or milling) are used to prepare the implantation site, then the implant can be seated at the desired site, but damage is inflicted to the implantation site through removal of useful sound bone, resulting in weakened tissue and increased reliance on bone grafts
Solution Approach 1:
Instead of removing bone material to create the implantation site (subtractive method), the invention uses an additive approach where bone-implantable material is deposited directly onto the prepared site. This inverts the traditional preparation methodology, avoiding removal of sound bone while still achieving proper implant seating and osseointegration.
Solution Approach 2:
The invention changes the fundamental parameter of material removal to material addition. By using bone-implantable materials that can be deposited and cured in place, the process transforms from subtractive (drilling/milling) to additive (deposition and curing), thereby eliminating damage to surrounding healthy bone tissue.
2Measurement precision
If custom-produced implantable objects and guiding devices are used based on CAT scan data, then precision in implant placement is improved, but device complexity and fabrication cost increase
Solution Approach 1:
The invention performs preliminary planning using CAT scan data to create virtual models and determine optimal implant placement before the actual surgery. Guiding devices are fabricated in advance based on this pre-surgical planning, allowing for precise placement during the procedure while minimizing intraoperative complexity.
Solution Approach 2:
The invention creates physical copies or representations of the patient's anatomy from CAT scan data. Virtual models are generated from imaging data, and guiding devices are fabricated as physical copies that replicate the unique anatomical features, enabling precise implant placement without requiring complex custom fabrication during surgery.
3Productivity
If traditional implant placement methods are used, then surgical procedures can be performed, but time-consuming operative procedures and risk of graft failure occur
Solution Approach 1:
The invention extracts or removes the need for bone grafting procedures from the traditional implant placement protocol. By using bone-implantable materials that can be directly deposited and cured, the method eliminates the separate grafting step, reducing procedural time and eliminating the associated risks of graft failure.
Solution Approach 2:
The invention creates a continuous process where bone-implantable material is deposited directly onto the prepared implantation site and immediately cured, establishing continuous contact between the implant and bone. This eliminates gaps or interruptions in the osseointegration process, reducing healing time and improving reliability compared to traditional methods that require separate grafting procedures.
Data Source
AI summary
Embodiments of the disclosure relate to implantable objects and guiding devices, as well as recipient site preparation instruments, bone-implantable materials, and methods of fabrication and use thereof.