Plate rod snap ring for removable partial denture

Abstract

The invention discloses a plate rod snap ring for a removable partial denture. According to the plate rod snap ring, the bottom of a U-shaped minor connector is connected with a connector; one end of the top of the U-shaped minor connector is connected with an occlusal rest on the mesial side of an oeclusal of an abutment, and the other end of the top of the U-shaped minor connector is connected with a distal adjacent panel; the distal adjacent panel is attached to a guide plane prepared from distal adjacent surfaces of the abutment; the cheek side upper end of the distal adjacent panel is connected with a retention arm; and the tail of the retention arm is clamped in an inverted concave area of the cheek side of the abutment and does not exceed a cheek axial ridge of the abutment. The plate rod snap ring for the removable partial denture does not influence the face and attractiveness of the patient, does not disturb the arrangement of artificial teeth and has a wide application range.

Description

technical field [0001] The invention relates to a removable (movable) denture snap ring for oral restoration. technical background [0002] After tooth loss, oral restorations need to be placed to restore the patient's chewing and pronunciation functions and improve the facial appearance. Commonly used oral restorations can be divided into two categories: fixed restorations and removable restorations. Among them, removable partial dentures are a large category of movable restorations, which can repair various types of dentition defects. Due to its wide adaptability and moderate price, its application range is very wide. [0003] Removable partial dentures are composed of a retainer fixed on the abutment, an artificial tooth for repairing dentition defects, a base for fixing the artificial tooth, and a connecting body connecting the base and the retainer. The retainer of the existing removable partial denture is mainly a snap ring, which is made of metal casting or steel wi...

AI Technical Summary

Problems solved by technology

The retaining arm and the opposing arm of the cast circular clasp (A card) enter the undercut area of ​​the lip / buccal surface of the abutment from the occlusal side, surround the three surfaces and four axial corners of the abutment, and play a role in retention and Stabilizing effect; at the same time, this kind of clasp also plays a supporting role through the occlusal rest of the occlusal surface of the abutment teeth, and its fixing effect is good; but it is not conducive to the physiological function of the abutment teeth, affecting the discharge of food and the physiological stimulation of the gums; Covering a large area of ​​the abutment teeth may lead to caries of the abutment teeth; at the same time, the snap ring will be exposed on the lip / buccal side of the abutment teeth, which will affect the appearance

The casting rod-shaped clasp enters the undercut area of ​​the lip / buccal surface of the abutment tooth from the side of the abutment gingiva, and wraps around the lip / buccal surface of the abutment tooth; its contact area with the abutment tooth is relatively small, and its position is relatively hidden, but because it needs If the abutment enters the undercut area, it cannot be used when the soft tissue has a large undercut; at the same time, if the abutment is the first premolar, it will also affect the appearance

The semicircular C-shaped or L-shaped clasp retained by the undercut area on the proximal surface of the abutment, although the clasp will not be exposed on the lip / buccal surface of the abutment, has improved aesthetics, but the semicircular clasp The ring arm is located on the adjacent surface of the abutment teeth, forming a protrusion on the adjacent surface of the abutment teeth, which will hinder the arrangement of adjacent artificial teeth and easily cause food impaction

Images