Dental Drill Guide Anti-Rotation and Axial Retention Mechanism
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Solution Overview
Problem
Current dental drill guides face challenges in secure and easy mounting within surgical templates, often leading to inadvertent axial disengagement and rotation during dental implant surgery.
Innovation Solution
A dental drill guiding system comprising a drill guide and a guide sleeve, where the guide sleeve has an anti-rotation section with a non-circular cross-section and radially extending undercuts, and the drill guide has complementary anti-rotation sections and radially extending protrusions that fit into the undercuts, ensuring rotational fixation and axial retention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If standard guide sleeves are used in dental surgical templates, then drilling precision is improved, but the system becomes prone to inadvertent axial disengagement and rotation during surgery
Solution Approach 1:
The guide sleeve incorporates an anti-rotation section with a non-circular cross-section that engages with a corresponding asymmetric feature on the drill guide. This asymmetric engagement prevents rotational movement of the drill guide relative to the guide sleeve, thereby maintaining drilling precision while eliminating the reliability issue of inadvertent rotation and disengagement during surgery.
2Manufacturing precision
If the drill guide is made small in diameter for precision fitting, then guidance precision is improved, but handling becomes difficult and aspiration risk increases
Solution Approach 1:
The drill guide is divided into functionally distinct segments: a small-diameter hollow tube portion for precise fitting within the guide sleeve to maintain guidance precision, and a separate handle portion for practitioner manipulation. This segmentation allows the critical guidance element to remain small while the handling element provides ergonomic size and grip, resolving the contradiction between precision and ease of operation.
3Manufacturing precision
If the hollow tube internal diameter is reduced to match smaller drills, then drill fit precision is improved, but the handle size must be reduced which compromises grip
Solution Approach 1:
The drill guide is segmented into a hollow tube portion with small internal diameter for precise drill fit, and a handle portion that can be sized independently for optimal grip. The handle extends from the hollow tube, allowing the grip area to be larger and more ergonomic while the tube remains small for precision drilling, thus resolving the contradiction between drill fit precision and grip quality.
Data Source
AI summary
A dental drill guiding system includes a drill guide including a hollow tube having an exterior surface and a guide sleeve including an internal surface defining a through bore configured to receive the hollow tube of the drill guide. The exterior surface of the hollow tube and guide sleeve's internal surface have complementary anti-rotation sections. The drill guide's hollow tube further includes at least one radially extending protrusion limited in the axial extent and formed by an increase in radius of the hollow tube in the apical direction and dimensioned for accommodation in at least one undercut of the guide sleeve, such that when at least one protrusion of the hollow tube is housed in at least one undercut of the guide sleeve the hollow tube is axially retained within the guide sleeve such that removal of the drill guide from the guide sleeve in the coronal direction is prevented.