Maxillary Sinus Drill with Rounded Edge for Membrane Safety

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Solution Overview

Problem

Conventional implant surgery drills for the maxillary sinus face challenges such as mucous membrane damage, prolonged surgery time due to low drilling speeds, and patient discomfort from malleting impacts, along with difficulties in navigating irregular bone shapes and managing bone chips.

Innovation Solution

A drill design featuring a cutting portion with a concave distal end, rounded outer edge, and sloped cutting blades, which forms a bone disk to prevent mucous membrane contact, allows for quick and safe lifting of the membrane, and includes a chip pocket for efficient bone chip discharge, eliminating the need for malleting and reducing operator stress.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the drill is rotated at a lower speed to prevent mucous membrane from being torn, then the mucous membrane safety is improved, but the drilling work takes a long time

Engineering Contradiction:

Improvemucous membrane safetyVSAvoiddrilling speed

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The cutting portion of the drill tip is designed with a rounded outer circumferential edge instead of a sharp edge. This curved geometry reduces the risk of tearing the mucous membrane during contact while maintaining effective bone cutting capability, thereby improving mucous membrane safety without significantly reducing drilling speed

Inventive Principle:

Principle #14Spheroidality (Curvature)

Solution Approach 2:

The drill tip geometry is modified by changing the curvature radius of the outer circumferential edge. This parameter change allows the drill to maintain cutting efficiency while reducing the harmful sharp edges that could tear the mucous membrane, resolving the contradiction between safety and productivity

Inventive Principle:

Principle #35Parameter changes

2Productivity

If a sharp drill blade is used for effective bone perforation, then the drilling efficiency is improved, but the mucous membrane may be easily torn during rotation

Engineering Contradiction:

Improvedrilling efficiencyVSAvoidmucous membrane damage

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The outer circumferential edge of the cutting portion is designed with a specific curvature radius, transforming the sharp edge into a rounded edge. This maintains the cutting ability for bone perforation while eliminating the tearing effect on the mucous membrane during rotation

Inventive Principle:

Principle #14Spheroidality (Curvature)

Solution Approach 2:

The drill tip is designed with different geometric properties at different locations: the cutting blades maintain sharp edges for effective bone cutting, while the outer circumferential edge has a rounded profile to protect the mucous membrane. This local differentiation resolves the contradiction between cutting efficiency and membrane safety

Inventive Principle:

Principle #3Local quality

3Loss of time

If the operator applies excessive force to perforate the maxillary sinus quickly, then the surgery time is reduced, but the mucous membrane may be perforated inadvertently

Engineering Contradiction:

Improvesurgery timeVSAvoidmucous membrane integrity

Core Design Contradiction:

Loss of timeVSReliability

Solution Approach 1:

The rounded outer circumferential edge of the drill tip acts as a cushioning element that prevents excessive force from directly transmitting to the mucous membrane. This geometric cushioning allows the operator to apply force more aggressively without increasing the risk of membrane perforation, reducing surgery time while maintaining safety

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

4Ease of manufacture

If conventional drilling methods are used, then the bone perforation capability is maintained, but the cut bone chips cannot be easily cut and discharged

Engineering Contradiction:

Improvebone perforation capabilityVSAvoidbone chip discharge

Core Design Contradiction:

Ease of manufactureVSEase of operation

Solution Approach 1:

The cutting portion is designed with multiple cutting blades arranged around the drill tip, creating segmented cutting edges. This segmentation improves bone chip discharge by creating multiple egress paths and reducing chip accumulation, while maintaining effective bone perforation capability through the coordinated action of multiple blades

Inventive Principle:

Principle #1Segmentation

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 drill ensures safe and rapid mucous membrane lifting, reduces surgery time, minimizes patient pain, and enhances clinical success rates by maintaining effective bone perforation and reaming capabilities while preventing membrane damage and bone chip issues.

Implementation Method 1

a cutting portion formed at a lower end of the body and having a cutting blade for drilling

Methodology Applied

Scientific EffectAbrasion: Abrasion

Data Source

PatentUS9848962B2Drill for implant surgery

Publication Date: 2017.12.26 OSSTEMIMPLANT CO LTD

AI summary

A drill for an implant surgery is provided which allows a mucous membrane in the maxillary sinus to be quickly and safely lifted without being damaged during a surgery for the maxillary sinus. The drill for use in an implant surgery includes a connection portion formed at an upper end of a body of the drill to be connected with a driving device; and a cutting portion formed at a lower end of the body and having a cutting blade for drilling, wherein an outer circumferential edge of a distal end of the cutting portion protrudes rather than a center of the distal end of the cutting portion.