Dental Forceps Recessed Cavity Curvature
Solution Overview
Problem
Existing dental forceps cause damage to teeth during luxation due to a riding movement that results from incomplete grip and sharp edges, leading to potential fractures and root damage.
Innovation Solution
The design of dental forceps with a recessed cavity in the longitudinal groove having a smaller radius of curvature than the groove, providing a smooth, even contact with the tooth, and featuring an ellipsoidal transitional area and cylindrically ground surface to prevent sharp edges and enhance grip, allowing for a more secure and gentle luxation process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a flat longitudinal groove with large radius of curvature is used, then the manufacturing is simpler and the structure is more robust, but the tooth grip is incomplete and causes riding movement during luxation
Solution Approach 1:
The patent applies curvature by introducing a recessed cavity with a smaller radius of curvature within the longitudinal groove. This curved recessed area conforms to the convex outer surface of the tooth, creating smooth even contact and eliminating the riding movement that occurs with a flat groove, while still maintaining manufacturing feasibility through standard forming processes
2Device complexity
If a flat longitudinal groove is used, then the device structure is simpler, but the tooth experiences point-by-point contact instead of even contact, causing damage during luxation
Solution Approach 1:
The recessed cavity with its curved inner surface matches the convex shape of the tooth crown, distributing contact forces evenly across the tooth surface during luxation. This eliminates the harmful point-by-point contact and riding movement that causes fractures to the crown and root, while adding minimal structural complexity
Solution Approach 2:
The patent applies local quality by creating a recessed cavity with specific curvature properties only in the critical area where the tooth contacts the forceps. This localized curved recess provides optimal tooth engagement without requiring the entire groove structure to be complex, maintaining simplicity where possible while providing protection where needed
3Reliability
If the recessed cavity extends over the entire length of the longitudinal groove, then the tooth grip is more secure, but the device becomes more complex and harder to manufacture
Solution Approach 1:
The patent applies partial action by making the recessed cavity extend only over a portion of the longitudinal groove length rather than the entire length. This partial recess provides sufficient tooth grip security for extraction operations while avoiding the unnecessary complexity and material usage of a full-length recess, achieving the minimum effective action required
Data Source
AI summary
The invention relates to a dental forceps with two articulated parts, which are connected to each other at a pivot and which each exhibit a handle at one end and at the other end a working end with an inside area, such that the inside area exhibits a corrugated area which runs perpendicular to the longitudinal axis, and such that a longitudinal groove is positioned within the inside area, starting at the distal end of the working end and running along the longitudinal axis of the working end, and such that a recessed cavity is positioned in the longitudinal groove, starting at the distal end, and the radius of curvature of the recessed cavity is smaller than the radius of curvature of the longitudinal groove.