CN105640482A

CN105640482A - Medical oral-cavity expander

Info

Publication number: CN105640482A
Application number: CN201610204971.7A
Authority: CN
Inventors: 于淼
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-04-05
Filing date: 2016-04-05
Publication date: 2016-06-08
Anticipated expiration: 2036-04-05
Also published as: CN105640482B

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

Medical oral cavity dilator

Technical field

The present invention relates to the medical apparatus and instruments of a kind of department of stomatology and oral maxillofacial surgery, specifically a kind of Medical oral cavity dilator.

Background technology

The ramus of mandible end of mandibular bone has two projections, and the condyle that is referred to as being located behind is dashed forward, and the neck of mandible below head of mandible that it is expanded by upper end and head forms. Condyle of mandible ovalize, inside and outside path length, anteroposterior diameter is short. Side is seen, and has a horizontal ridge that prominent for condyle top is divided into former and later two inclined-planes. Front bevel is little, for functional surfaces, is the heavy burden district in joint; Condyle of mandible is the Hao Fa district of jaw fracture, it is possible to be directly hit the direct fracture that causes of condyle teat, it is also possible to is mandibular bone chin portion or indirect fracture that body catches a packet and causes, easily fails to pinpoint a disease in diagnosis clinically. Condyle of mandible is the position that mandibular bone is the weakest, thus is the predilection site of fracture of mandible. Owing to condyloid process is the important component part of remporomandibular joint, there is special physiological function, when, after condylar fracture, temporomandibular joint certainly will be affected, affect meshing functions, and the growth promoter of child's mandibular bone and face is had obvious impact. At present, the treatment of fracture of condylar process is broadly divided into two big classes, a kind of non-operative treatment being to adopt intermaxillary traction replacement and fixation, i.e. expectant treatment, and another kind is the operative treatment of the lower replacement and fixation of surgical incision direct-view. For many years, which is better and which is worse there are some disputes for two kinds of methods, but total situation, expectant treatment is always up the main flow of Treatment of Condylar Fractures. Expectant treatment is the exposure fracture site that do not operate, but adopt maxillary and mandibular teeth row to put Arch bar splint, the grinding one's teeth in sleep of early contact is placed the valve rubber of 2 ~ 3mm, by intermaxillary traction, fix on central occlusion position, make the mandibular ramus of shifting move down, on ascending branch, the bone stump of part recovers therewith, it is fixed on normal position, allows the condyle of fracture dash forward and ascending branch heals on this position, again complete bone and connect. Chinese patent 2012100319709 discloses one " Mandibular condyle fracture reduction dilator ", there are two clamp handles that intersection hinge connects, the front end of these two clamp handles is supporting portion, its rear end is grip part, make supporting portion strut by the leverage of hinge when the force of grip part, reach to strut lower jaw and zygomatic arch, appear joint space, facilitate the purpose of operation technique. But this dilator volume is relatively big, inconvenient operation, and in operation process, front end is arranged in patient's mouth, rear end is positioned at oral external, hinders operation technique and patient more painful; Supporting portion is in the same plane with grip part, and patient side cheek inwall is in use close in supporting portion, inconvenient operation; It addition, lever control strength is difficult to grasp, careless slightly supporting portion is easily bent deformation; Further, upper supporting portion is fixing with the angle in lower supporting portion, it is impossible to adapt to the individual variation of patient, the accuracy that impact struts. It addition, the operation on oral cavity such as dentistry also it is frequently necessary to adopt machinery passively to strut patient's mouth, facilitate operation technique, but the general volume of existing oral cavity spreader is bigger, there is bigger handle to stay outside patient oral cavity after strutting, cause psychological burden to patient, be also not easy to further operation technique simultaneously; Lacking necessary locking mechanism, the machinery strutted easily loosens.

Summary of the invention

It is an object of the invention to provide that a kind of compact conformation, easy to use, range of accommodation be big, reasonable stress, be suitable for the Medical oral cavity dilator of Different Individual difference.

For reaching object above, the technical solution adopted in the present invention is: this Medical oral cavity dilator includes the upper supporting portion that the lower supporting portion corresponding with the human body sigmoid notch zygomatic arch corresponding with human body upper jaw incisura coincide, the two ends in described lower supporting portion are respectively arranged with axle bed and transmission case, are provided with slide bar by bearing between described axle bed and transmission case; The stage casing of the slide bar between axle bed and transmission case is with external screw thread, and is set with slide block by threaded engagement, and described slide block is hinged on the lower end of support bar; The lower end in described upper supporting portion is provided with strip groove, is provided with multiple axis hole in described groove, and the upper end of support bar is arranged in axis hole by rotating shaft; Described transmission case is provided with the driving mechanism driving slide bar to rotate.

Described slide bar has side by side and be arranged in parallel two, every slide bar is respectively provided with a slide block, the end of two slide bars is positioned at transmission case and is engaged by travelling gear, described transmission case is provided with by bearing and is perpendicular to the worm screw that slide bar is arranged, any one in two slide bars is passed through worm gear and worm engaging, and the end of worm screw is provided with the installing hole for connecting handle.

The beneficial effects of the present invention is: compact conformation, it is entirely located in during use in patient's mouth, easy to use, patient is painful little, without psychological burden, adopt worm and gear driving mechanism, any position can be automatically locked at, reasonable stress, it is less likely to occur mechanically deform or situation about fractureing in using, can adjust, according to Different Individual difference, the amplitude strutted flexibly, applied widely.

Accompanying drawing explanation

Fig. 1 is the structural representation of one embodiment of the invention.

Fig. 2 is that the A-A of Fig. 1 embodiment is to structural representation.

Detailed description of the invention

As it is shown in figure 1, this Medical oral cavity dilator of the present invention includes the upper supporting portion 2 that the lower supporting portion 1 corresponding with the human body sigmoid notch zygomatic arch corresponding with human body upper jaw incisura coincide, upper supporting portion 2 is the circular arc of epirelief, has good elasticity. Lower supporting portion 1 is recessed circular arc, front end, lower supporting portion 1 a boss 13 is arranged below, this boss 13 can be fitted the groove position of sigmoid notch, contributes to firm position, accurately. The two ends in described lower supporting portion 1 are respectively arranged with axle bed 3 and transmission case 4, are provided with slide bar 5,6 by bearing between described axle bed 3 and transmission case 4; The stage casing of the slide bar 5,6 between axle bed 3 and transmission case 4 is with external screw thread, and is set with slide block 7,8 by threaded engagement, and described slide block 7,8 is hinged on the lower end of support bar 9,10; The lower end in described upper supporting portion 2 is provided with strip groove 21, is provided with multiple axis hole 22 in described groove 21, and the upper end of support bar 9,10 is arranged in axis hole 22 by rotating shaft; Can as required the upper end correspondence of support bar 9,10 be arranged in different axis holes 22 during use, it is achieved different support amplitudes; Described transmission case 4 is provided with the driving mechanism driving slide bar 5,6 to rotate. Slide bar 5,6 can move axially by band movable slider 7,8 when rotating, thus changing the inclination angle of support bar 9,10.

Described slide bar 5,6 has side by side and be arranged in parallel two, every slide bar is respectively provided with a slide block, the end of two slide bars is positioned at transmission case 4 and is engaged by travelling gear 41, described transmission case 4 is provided with by bearing and is perpendicular to the worm screw 42 that slide bar is arranged, any one in two slide bars is engaged with worm screw 42 by worm gear 43, and the end of worm screw 42 is provided with the installing hole for connecting handle. The shape of this installing hole can be rectangle or cross-shaped, inject the handle matched, can rotary worm 42, thereby through worm gear 43 and travelling gear 41 drive two slide bars reversely rotate, two slide bars of reverse rotation drive respectively again two slide blocks respectively to both direction slide.Reach to lift the purpose in supporting portion 2. When sliding, two slide blocks can slide into the other end from one end of slide bar, and the sliding scale of slide block is big, and upper supporting portion 2 can obtain bigger heave amplitude accordingly.

During use, this dilator can unilateral use, it is possible to bilateral uses. The inwall of patient's cheek is close in lower supporting portion 1 and upper supporting portion 2, and oral cavity central space is big, it is simple to operation.

Claims

1. Medical oral cavity dilator, including the upper supporting portion (2) that the zygomatic arch that the lower supporting portion (1) corresponding with human body sigmoid notch is corresponding with human body upper jaw incisura coincide, it is characterized in that: the two ends of described lower supporting portion (1) are respectively arranged with axle bed (3) and transmission case (4), are provided with slide bar (5,6) by bearing between described axle bed (3) and transmission case (4); The stage casing of the slide bar (5,6) being positioned between axle bed (3) and transmission case (4) is with external screw thread, and is set with slide block (7,8) by threaded engagement, and described slide block (7,8) is hinged on the lower end of support bar (9,10); The lower end of described upper supporting portion (2) is provided with strip groove (21), is provided with multiple axis hole (22) in described groove (21), and the upper end of support bar (9,10) is arranged in axis hole (22) by rotating shaft; Described transmission case (4) is provided with the driving mechanism driving slide bar (5,6) to rotate.

2. Medical oral cavity dilator according to claim 1, it is characterized in that: described slide bar (5,6) has side by side and be arranged in parallel two, every slide bar is respectively provided with a slide block, the end of two slide bars is positioned at transmission case (4) and by travelling gear (41) engagement, described transmission case (4) is provided with by bearing and is perpendicular to the worm screw (42) that slide bar is arranged, any one in two slide bars is engaged with worm screw (42) by worm gear (43), and the end of worm screw (42) is provided with the installing hole for connecting handle.