Maxillary premolar severe wedge-shaped defect fiber post restoration and production method thereof

Abstract

The invention discloses a mandibular premolar severe wedge-shaped defect fiber post restoration. The mandibular premolar severe wedge-shaped defect fiber post restoration comprises a single fiber postand a wedge-shaped composite resin filling, and the single fiber post is a cylinder with the tail end diameter being 0.7-0.8 mm and the occlusion square diameter being 1.3-1.6 mm; and the height of the single fiber post is 6.0-7.5 mm less than that of a tooth length. The depth from the tip end to the bottom end of the wedge-shaped composite resin filling is 1 / 2 to 2 / 3 of the buccolingual diameterof a dental cervical part, the width of the wedge-shaped composite resin filling is from the mesial proximal surface to the distal mandibular premolar of the mandibular premolar tooth, the thicknessis 3.0-5.0 mm, and the wedge-shaped composite resin filling encircles occlusal 1 / 3 to middle 1 / 3 junction of the singe fiber post. The single fiber post of the restoration is positioned in a buccal root canal, and the fiber post is compounded with the composite resin by using the connection and auxiliary retention effects of the fiber post in order to directly complete the restoration without fullcrown.

Description

Technical field [0001] The invention belongs to the technical field of dental restoration preparation, and specifically relates to a pulp-piercing wedge-shaped defective fiber post restoration of the maxillary premolar and a preparation method. Background technique [0002] Possible causes of pulp-piercing wedge-shaped defects in maxillary premolars include weak structure of the tooth neck, mechanical effects, acid erosion, It is caused by the combined action of multiple factors such as physical fatigue and muscle stress, which often leads to pulp disease, periapical disease, and in severe cases, transverse fracture of the crown and neck. [0003] Currently, the commonly used clinical treatment method is root canal treatment + post and core + full crown to prevent the occurrence of fracture of the crown neck. However, after root canal treatment of a pulp-piercing wedge-shaped defect in the maxillary premolar, the remaining dental tissue in the neck becomes less; after full...

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Problems solved by technology

[0004] The full crown restoration can make the stress disperse evenly and improve the fracture resistance of the remaining tooth tissue. However, due to the high mechanical strength of the full crown restoration, when subjected to When the force is applied, the stress is likely to be transmitted to the root tissue, increasing the unfavorable fracture, causing the occurrence of root fracture, and eventually the affected tooth may be lost

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