Maxillofacial surgical instrument

Abstract

The invention relates to a surgical instrument for maxillofacial surgery, in particular to a maxillofacial surgical instrument. The maxillofacial surgical instrument comprises a lower expanding part corresponding to a human body mandibular notch, and an upper expanding part matched with the zygoma corresponding to the human body mandibular notch. The two ends of the lower expanding part are provided with a lower expanding front rod and a lower expanding rear rod in a hinged mode respectively. The two ends of the upper expanding part are provided with an upper expanding front rod and an upper expanding rear rod in a hinged mode respectively. The upper end of the lower expanding front rod and the lower end of the upper expanding front rod are hinged to a front hinge shaft. The upper end of the lower expanding rear rod and the lower end of the upper expanding rear rod are hinged to a rear hinge shaft. The front hinge shaft and the rear hinge shaft are arranged on a middle shaft. The expander is compact in structure and convenient to use, pain of a patient is little, stress is reasonable, and the maxillofacial surgical instrument is not prone to mechanical deformation or breaking in use and can adapt to individual differences.

Description

technical field [0001] The invention relates to a medical device for maxillofacial surgery, in particular to a maxillofacial surgical device. 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 condyle is th...

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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