Mandibular condyle reposition expander

Abstract

The invention relates to a medical instrument used for a dental operation, in particular to a mandibular condyle reposition expander. The mandibular condyle reposition expander comprises a lower supporting and combining portion and an upper supporting and combining portion. The lower supporting and combining portion corresponds to the incisura of the underjaw of the human body. The upper supporting and combining portion is matched with the zygomatic arch corresponding to the incisura of the underjaw of the human body. A lower supporting front rod and a lower supporting rear rod are hinged to the two ends of the lower supporting and combining portion respectively. An upper supporting front rod and an upper supporting rear rod are hinged to the two ends of the upper supporting and combining portion respectively. The upper end of the lower supporting front rod and the lower end of the upper supporting front rod are hinged to a front hinged shaft. The upper end of the lower supporting rear rod and the lower end of the upper supporting rear rod are hinged to a rear hinged shaft. Both the front hinged shaft and the rear hinged shaft are arranged on a middle shaft. The expander is compact in structure and convenient to use, the pains of patients are small, force is reasonably borne, mechanical deformation or breakage can not easily occur in the use process, and the mandibular condyle reposition expander can adapt to different individual differences.

Description

technical field [0001] The invention relates to a medical instrument used in dental operations, in particular to a mandibular condyle reset spreader. Background technique [0002] There are two protrusions at the end of the mandibular branch of the mandible. The one located at the rear is called the condyle, which consists of the enlarged mandibular head at the upper end and the mandibular neck below the head. The mandibular condyle is elliptical, with a long inner and outer diameter and a short anteroposterior diameter. In lateral view, a transverse crest divides the top of the condyle into two oblique planes. The anterior slope is small, which is the functional surface, and is the load-bearing area of ​​the joint; the mandibular condyle is a prone area for jaw fractures, which can be caused by direct impact on the condyle, or can be caused by trauma to the chin or body of the mandible. Indirect fractures caused by blows are easily missed clinically. The mandibular condy...

AI Technical Summary

Problems solved by technology

But this kind of spreader is bulky and inconvenient to operate. During the operation, the front end is located in the patient's oral cavity, and the rear end is located outside the oral cavity, which hinders the operation and causes more pain for the patient; The brace part is close to the inner wall of the patient's side of the cheek during use, which is inconvenient to operate; in addition, it is difficult to control the force of the lever operation, and the brace part is easy to bend and deform if there is a slight carelessness; in addition, the upper brace part and the lower brace part The included angle is fixed and cannot adapt to the individual differences of patients, which will affect the accuracy of distraction

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