Pinch Grip Toothbrush Handle for Gum Protection
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Solution Overview
Problem
Contemporary toothbrush designs often encourage a power grip, leading to excessive force on the gums during brushing, which can cause noncarious cervical lesions (NCCLs) due to the large surface area and length of the handles accommodating a full-hand grip, resulting in aggressive brushing and potential gum recession.
Innovation Solution
The development of a toothbrush with a pinch grip handle featuring contoured grooves that reduce the pressure applied during brushing, designed to accommodate a two or three-fingered grip, incorporating a distal, medial, and proximal region with specific radial widths and finger grooves to encourage a pinch grip over a power grip, and optionally including a stress-breaking feature to flex when excessive force is applied.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the toothbrush handle is designed with large surface area and length to accommodate a full-hand power grip, then the user can exert more force to remove plaque, but the applied pressure on gums increases excessively causing noncarious cervical lesions and gum recession
Solution Approach 1:
The handle incorporates specific geometric features (concave regions, finger grooves, and ergonomic contours) at localized positions to guide finger placement and restrict the grip to only two or three fingers. This local structural modification ensures that the user naturally adopts a pinch grip rather than a full-hand power grip, thereby limiting the maximum force that can be applied to safe levels while still enabling effective plaque removal.
2Ease of operation
If the toothbrush handle accommodates a power grip with entire hand, then easier control and stability are achieved, but aggressive brushing behavior is encouraged leading to gum damage
Solution Approach 1:
The handle is segmented into distinct functional zones including a grip region with concave contours for finger placement, a transition region, and a head region. The grip region is specifically designed with finger grooves that segment the hand positioning, allowing only two or three fingers to engage while leaving the rest of the hand free. This segmentation maintains control and stability through proper finger placement while preventing the entire hand from gripping in a power grip manner.
3Object-affected harmful factors
If the handle surface area is reduced to prevent power grip, then excessive force is limited, but sufficient grip control for effective cleaning may be compromised
Solution Approach 1:
The handle incorporates curved and contoured surfaces including concave regions and finger grooves that naturally guide the placement of two or three fingers. These curved features provide adequate surface area for proper finger engagement and control, while the specific geometry (depth, width, and positioning of concave regions) ensures that only a pinch grip is comfortable and natural. This curvature design maintains sufficient grip control for effective cleaning while preventing power grip adoption.
Data Source
AI summary
A toothbrush with a pinch grip toothbrush handle facilitates a healthier brushing technique by encouraging the use of a pinch grip. A pinch grip handle with one or more finger grooves encourages the use of a pinch grip, thereby reducing the amount of pressure a user can apply during brushing at any brushing orientation. A finger groove may be contoured, consisting of concave surface areas and optionally convex surface areas. A handle may feature a pair of finger grooves that resemble a peanut or hour glass shape, which encourages the use of a pinch grip. Embodiments may take the form of a supplemental attachment to a toothbrush, or an integral part of a solid single-piece toothbrush.