Drill Flow Adapter for Controlled Sinus Membrane Lifting
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Solution Overview
Problem
Current methods for creating a perforation or cavity in the bone to lift the sinus membrane for dental implant placement often result in inadequate bone grafting and risk of sinus membrane perforation or 'drowning', due to uncontrolled pressure and flow rates during drilling.
Innovation Solution
A drill with a flow adapter that controls the pressure and flow rate of a liquid at the free end, using a backflow system to modulate the liquid flow and prevent excessive pressure, combined with a kit of drills adapted for varying bone heights, ensuring controlled sinus membrane detachment and graft placement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a drill is used to create a perforation or cavity in the bone to lift the sinus membrane, then the sinus membrane can be detached and lifted for graft placement, but uncontrolled pressure and flow rates may cause sinus membrane perforation or 'drowning'
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the liquid flow rate and pressure parameters during the drilling process. The flow rate is controlled to vary over time, with different flow rates applied at different stages of drilling to prevent membrane perforation while ensuring effective membrane detachment and lifting.
Solution Approach 2:
The patent implements preliminary action by pre-cooling the drill and bone structure before the actual drilling begins. A cooling liquid is introduced in advance to lower the temperature of the bone and drill, preventing thermal damage to the sinus membrane during the subsequent drilling operation.
2Productivity
If high flow rate liquid is used to detach and lift the sinus membrane, then membrane detachment is more effective, but excessive pressure may cause membrane perforation
Solution Approach 1:
The patent applies periodic action by using pulsating or intermittent liquid flow rather than continuous constant flow. The liquid is delivered in controlled pulses that create hydraulic pressure to detach and lift the membrane effectively, while the intermittent nature of the flow prevents excessive pressure accumulation that could cause perforation.
Solution Approach 2:
The patent implements dynamics by making the liquid flow rate and pressure dynamic rather than static. The flow parameters are continuously adjusted during the procedure to match the real-time state of membrane detachment, ensuring optimal effectiveness while maintaining safety margins to prevent perforation.
3Manufacturing precision
If drilling continues until the sinus floor is completely pierced, then the cavity is fully formed for grafting, but the sinus membrane may be perforated
Solution Approach 1:
The patent applies feedback by using imaging or sensing systems to monitor the drilling progress and membrane position in real-time. This feedback information is used to adjust drilling parameters and liquid flow rates dynamically, allowing the surgeon to stop drilling at the optimal point when the cavity is sufficiently formed without compromising membrane integrity.
Solution Approach 2:
The patent implements preliminary action by creating a safety margin in the drilling depth. The drilling is stopped before complete penetration of the sinus floor, leaving a small margin that prevents membrane perforation while still providing sufficient cavity volume for successful bone grafting.
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
This approach allows reliable and controlled lifting of the sinus membrane, reducing the risk of perforation or 'drowning', enabling efficient and precise bone grafting and implant placement in a single step, even with varying alveolar crest heights.
Implementation Method 1
liquid under pressure to the end of the drill... hydraulic pressure from the hand-piece of the drill is introduced to the surgical site, providing enough force to begin the lifting of the membrane from the sinus floor
Implementation Method 2
The central portion has at least one opening for a cooling fluid that cools the drill and the bone during the drilling operation
Implementation Method 3
A flow adapter for diverting a portion of the liquid that enters the channel of the drill... to modulate the liquid flow and prevent excessive pressure
Data Source
Figure 1
Figure 2
Figure 3a~3b
AI summary
Tool for creating a perforation or cavity in a bone or bone structure (OS) in contact with a sinus membrane (MS), the tool including a drill (22,24) having a free end and a channel (21) adapted for supplying a liquid under pressure to the free end, the tool further including a source of the liquid under pressure such that the liquid flows partially into and through the bone or bone structure toward the membrane while drilling the bone or bone structure with the drill, which allows to perform a progressive detachment of the membrane when the drill is close to the membrane while still being inside the bone or bone structure, and before completely piercing the bone or bone structure, wherein the tool further includes a flow adapter for diverting a portion of the liquid after entering the channel (21) of the drill, such that a second flow (34) of the liquid supplied to the free end of the drill is smaller than or equal to a first flow (33) of the liquid entering the channel.