Variable lower jaw angle locating bone cutting device

Abstract

An osteotomy locator with adjusted angle of mandible comprises a flexible-shaft coupling sleeve, wherein the right end of the flexible-shaft coupling sleeve is connected with a medical motor equipped with a transmission shaft therein, the left end of the flexible-shaft coupling sleeve is provided with a variable-angle clutch gear and connected with the right end of a transmission rod via the variable-angle clutch gear, the left end of the transmission rod is connected with a handpiece main shaft with a drill, the top of the handpiece is provided with a drill locking spider, a scale locating rod is attached to the transmission rod, the two sides of the scale locating rod with respect to the transmission rod are respectively connected with the drill locking spider and a movable retractor scale, a spring leaf is installed at the joint site of the movable retractor scale and the scale locating rod, the handpiece main shaft, the drill, the movable retractor scale and the transmission rod are integrally fixed, the movable retractor scale is provided thereof with a retractor, an anti-skidding gear, a sliding chute and 6-10 tangential small round holes with diameter of 2mm, the spring leaf passes through the small round hole and is fixed on the transmission rod, the drill passes through the sliding chute to allow the movable retractor scale to connect with the handpiece main shaft. The inventive osteotomy locator can be used for osteotomy and has the advantages of convenient operation, flexible service, and good safety and reliability.

Description

technical field [0001] The invention relates to an osteotome used for surgical plastic surgery, in particular to a mandibular angle variable positioning osteotome used for surgical plastic surgery on the mandibular angle, which belongs to the technical field of medical devices. Background technique [0002] With the continuous enrichment of people's material life, the rich and colorful spiritual life has been longed for by people, and people's requirements for beauty are also increasing day by day. Pursuing beauty is a fashion for people today. Therefore, plastic surgery has become popular with people. favor, and mandibular angle plastic surgery is one of the key points. At present, the methods of mandibular angle plastic surgery are mainly divided into extraoral approach and intraoral approach. The extraoral approach is to make an incision from the upper and outer sides of the occlusal plane at the anterior edge of the ramus of the mandible, incise the skin and subcutaneous...

AI Technical Summary

Problems solved by technology

The advantage of this method is that it is easier to expose the mandibular angle and locate it, and the field of vision is clear, but the scars left after the operation, the large damage range and the lack of radian of the mandibular angle are the major disadvantages of this method

The intraoral approach through the mouth, although there is no trouble of scar, but the positioning is inaccurate due to the narrow field of view, and the incision is small and the stripping cavity is deep, lacking reference objects, it is difficult to correctly judge the position of the osteotomy line, and if the operation is not careful, often Make the osteotomy away from the designed osteotomy line, even because of the small field of vision, it is often performed under blind vision, and the instrument will often damage the soft tissue and cause intraoperative bleeding, even life-threatening

Difficulties in osteotomy often result in fractures of the ascending ramus of the mandible. Osteotomy fails to achieve the expected arc angle effect, and even results in incomplete osteotomy, residual bone fragments, damage to soft tissues and blood vessels, resulting in postoperative hematoma and recurrence. Heavy bleeding, which greatly affects the surgical effect

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