Medical oral-cavity expander

Abstract

The invention relates to medical apparatus applied to the stomatological department and maxillofacial surgery, in particular to a medical oral-cavity opener. The medical oral-cavity opener comprises an upper support part and a lower support part, wherein a shaft seat and a transmission case are arranged at two ends of the lower support part respectively, and sliding rods are mounted between the shaft seat and the transmission case through bearings; external threads are arranged in the middle sections of the sliding rods between the shaft seat and a transmission case, the sliding rods are sleeved with sliding blocks by thread fit, and the sliding blocks are hinged to lower ends of support rods; a strip-shaped groove is formed in the lower end of the upper support part, a plurality of shaft holes are formed in the groove, and the upper ends of the support rods are mounted in the shaft holes through rotation shafts; a drive mechanism for driving the sliding rods to rotate is arranged in the transmission case. The expander has the advantages that the structure is compact, the use is convenient, pains to patients are small, the stress is reasonable, and the expander can be adapted to different individuals.

Description

technical field [0001] The invention relates to a medical device for stomatology and maxillofacial surgery, in particular to a medical oral retractor. 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 cond...

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

In addition, in oral surgery such as dentistry, it is often necessary to passively open the patient's oral cavity mechanically to facilitate the operation. However, the existing oral retractors are generally large in size, and after the expansion, a large handle is left outside the patient's oral cavity. It causes psychological burden, and it is not convenient for further operation; lack of necessary locking mechanism, the opening mechanism is easy to loosen

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