Bridge denture


A61C13/273 -

 

(57) Abstract:

The invention can be used in prosthetic dentistry. Dental bridges a dental prosthesis includes a support an artificial crown for fixing on the abutment teeth, pivotally connected with the respective end zones of the intermediate part, recreating the anatomical shape of the missing teeth. The hinge connection is formed by a slot made in the end zone of the intermediate portion, a lug rigidly mounted on the support crown, damping element, part of which is placed between the sides of the lug and slot, and the connecting axis passing through the holes of the ear, the damper element and the walls of the slot of the intermediate part. In the hole of the connecting axle is mounted with the possibility of longitudinal movement. The hole in the eyelet is executed, oval, with a greater horizontal axis, its vertical dimension at least equal to the diameter of the connecting axis and the horizontal is larger than the diameter of the latter. The technical result - the compensation of the longitudinal forces acting on the load of chewing pressure abutment, as well as reducing action on the abutment teeth transverse pywikipedia and rotation moments. 3 C.p. f-crystals, 10 ill.reconstruction of bridges.

Famous bridge denture containing the support of an artificial crown for fixing on the abutment teeth, pivotally connected with the respective end zones of the intermediate part, recreating the anatomical shape of the missing teeth. Each articulated connection such bridges can be formed running in the end zone of the intermediate portion of the slot cover located on the base of the crown ear, and the connecting axis passing through made holes in them. The hinged connection may be accomplished by rotation limiter anchor crowns upward relative to the intermediate part.

(See RF patent N 2026651, class A 61 C 13/273 with priority 12 February 1992)

In this prosthesis due to the presence of the hinge connections between the intermediate part with the support of artificial crowns ensured the emergence of a moment of rotation around the axis of the hinge when the force of chewing pressure applied in the area of one of the supporting teeth that prevents viviiviii force acting on the other abutment, is not affected at this time chewing load.

Vertical (concentric or eccentric) chewing pressure is La when this is decomposed into components, in the result of which is perpendicular to the axis of the prosthesis forces cause the transverse torque. The latter are not compensated by anything and leads to transverse (vestibular-oral) deviations of the abutment teeth, which is one of the functional disadvantages of the known prosthesis. When exposed to the forces of chewing pressure in the zone of the intermediate portion of the known prosthesis transverse pywikipedia moment acts on both the abutment tooth. When shifting the point of application of the transverse component of the force of chewing pressure to one of the abutment teeth torque through an intermediate portion of the prosthesis is transmitted to the unloaded tooth rotting on the cross vuvyhyghysmo and rotational components. Such pressure on the abutment teeth is compounded by the varying degrees of atrophy of periodontal tissues supporting the teeth, and, therefore, different degrees of mobility. Displacement of one of the reference tooth is greater than the significant level of atrophy of tissues of his periodontal, and therefore increase the transverse vivekanada and rotational forces acting on the other abutment, which adversely to periodontal, even if the atrophy of its tissues is minimal.

In addition, in the famous bridge prosthesis may occur in the infected tooth, occur when inclined in the longitudinal vertical plane of the position of the intermediate portion of the prosthesis, which she may take under the action of chewing pressure on the other abutment. This component of the force can have adverse effects on the periodontium.

The technical result, which directed the claimed invention, is to compensate for the longitudinal forces acting on the unloaded chewing pressure abutment, and reducing action on the abutment teeth transverse pywikipedia moment arising from the application of masticatory pressure in the zone of the intermediate portion, and a transverse pywikipedia and rotation moments on one of the abutment teeth when chewing load is exposed to the other abutment tooth.

The essence of the invention lies in the fact that bridges the dental prosthesis support an artificial crown for fixing on the abutment teeth pivotally connected with the respective end zones of the intermediate part, recreating the anatomical shape of the missing teeth. Each articulated connection of such a bridge is formed by a slot made in the end zone of the intermediate portion, a lug rigidly mounted on supports the positive axis, passing through the hole of the eyelet, the damper element, the slot walls and the intermediate portion of the prosthesis, and in the hole of the connecting axle is mounted with the possibility of longitudinal movement. The hole in the eyelet may be made oval, with a greater horizontal axis, its vertical dimension at least equal to the diameter of the connecting axis and the horizontal is larger than the diameter of the latter. The upper and lower sides of the openings in the loops can be formed by oppositely facing beveled from the outer sides of the inside of the hole in the side of its major axis - surfaces.

In Fig. 1 shows the proposed bridge denture.

In Fig. 2 - terminal area of the intermediate part is made in her nest and a channel for connecting the axis.

In Fig. 3 - metal crown with eyelets.

In Fig. 4 - damping element.

In Fig. 5 - terminal area of the intermediate portion embedded in its socket damping element.

In Fig. 6 is a cross section of the intermediate part and the occurrence of transverse torque under the action of chewing pressure.

In Fig. 7 - proposed bridge cross-section passing through the axis

In Fig. 9 is a diagram of the occurrence of longitudinally directed component of the force acting on one unloaded - abutment of the prototype under the action of chewing pressure on the other abutment tooth.

In Fig. 10 is a diagram of the forces acting on predlagaemy bridge.

The proposed bridge denture (Fig. 1) consists of a base of the crown 1, 2, fixed on the abutment teeth 3, 4, and United with the cast of the intermediate part 5, recreating the anatomical shape of the missing teeth, by means of hinge joints 6, 7. Each swivel socket formed And executed in the terminal area of the intermediate part 5 (Fig. 2), the elastic damping element 8 (Fig. 4), which is introduced into the slot (Fig. 5), the eyelet 9, attached to approximalely surface abutment crowns (Fig. 3) made with oval hole "a" with a greater horizontal axis. The upper and lower sides of the holes in the lug 9 formed oppositely facing beveled from the outer sides of the inside of the hole in the side of its major axis surfaces, which divides the bore of the eyelet on the areas "b" and "C" (Fig. 7). Holes in the lug and socket with a damping element in the connection parts of the prosthesis to form channels into which are inserted the connector is AMI holes corresponding lugs (Fig. 10).

When the force of chewing pressure P1(Fig. 8 and 10) applied in the middle part of the prosthesis, the distribution of loads on the abutment teeth similar to the distribution of loads on bridges with fixed connection parts. The emergence of torques M1around the connecting axes 10 and 11 is impossible due to the congruence end edges of the lug and socket and fixing these connecting axes. When the force P applied in the field of one of the abutment teeth 4, the hinge connection between the crown 1 and the intermediate part 5 there is a moment of rotation M around the connecting axis 10. This prevention of the occurrence and effect on the unloaded reference tooth 3 vertical viviiviii force F (Fig. 8). At the same time the power of the chewing pressure P1(Fig. 6) acting on the complex terrain of the chewing surfaces, in particular on the slopes chewing tubercles, is decomposed into components, one of which is K1- causes transverse torque M2for at least partial compensation of which the prosthesis is provided with a damping element 8 (Fig. 7). The latter has elasticity, and they filled the space between the side walls of the lug 9 and the socket Prohm is anoniem holes in the eye, wherein the upper and lower sides of the holes formed oppositely facing beveled from the outer sides of the inside of the hole surfaces, provides flexibility in the transverse direction of the intermediate part relative to the reference crowns, fixed on the abutment teeth within the elastic deformation of the damping elements. This reduces the effect on the abutment teeth transverse pywikipedia moment.

At the same time when the force of chewing pressure P on one of the abutment teeth 4 (Fig. 8, 9) may occur longitudinally directed component of the force S1acting on an unloaded reference tooth 3. When immersing the reference tooth 4 tooth hole under the force of chewing pressure P (Fig. 9), the intermediate part 5 of the prosthesis tilted with respect to the torque M due to the presence of swivel 6 anchor crown 1 with the intermediate part 5. The length of the horizontal projection of the intermediate portion in such position becomes less than the length of the intermediate part 5. Occurs longitudinally directed component of the force S1acting on the abutment tooth 3, seeking to compensate for this geometric change. To exclude the longitudinal direction is the t, adverse periodontal hole eyelet 9 (Fig. 3) made oval with greater horizontal axis. The size of the hole vertically at least equal to the diameter of the connecting axis of the swivel 10, 11 (Fig. 10), and horizontally - larger than the diameter of the axis. In the original is not loaded chewing pressure position of the prosthesis elements connecting the axes 10, 11 are associated with the outer end sections of the holes of the respective ears. When the force of chewing pressure P on the abutment tooth 4 (Fig. 10) when immersing the latter in a tooth hole around the connecting shaft 10 there is a moment of rotation M of the intermediate part 5 relative to the supporting crowns 1. Longitudinally directed force component S1acting on the abutment tooth 3 in the prototype (Fig. 9), the proposed bridge dental prosthesis does not occur due to the possibility of longitudinal displacement S (Fig. 10) of the intermediate part 5 and the connecting axis 10 relative to the eyelet 9 within the horizontal gap "g" between the connecting shaft and the inner end section of the orifice of the ear.

Thanks to this performance of the bridge in addition to achieved a placeholder for the result, consisting in compensation acting on Neagra the excitation forces, acting on a load of chewing pressure abutment, and as a result provides a favorable condition of the periodontium that support the tooth.

1. Bridge-like denture containing the support of an artificial crown for fixing on the abutment teeth, pivotally connected with the respective end zones of the intermediate part, recreating the anatomical shape of the missing teeth, characterized in that the articulated connection is formed by a slot made in the end zone of the intermediate portion, a lug rigidly mounted on the support crown, damping element, part of which is placed between the sides of the lug and slot, and the connecting axis passing through the holes of the ear, the damper element and the walls of the slot of the intermediate part, and in the hole of the connecting axle is mounted with the possibility of longitudinal movement.

2. Bridge-like denture under item 1, characterized in that the hole in the eyelet is executed, oval, with a greater horizontal axis, its vertical dimension at least equal to the diameter of the connecting axis and the horizontal is larger than the diameter of the latter.

3. Bridge-like denture under item 2, characterized in that the upper and lower Stour is ONU of its major axis, surfaces.

4. Bridge-like denture under item 1, characterized in that in the initial unloaded chewing pressure position of the prosthesis elements connecting the axis associated with the outer end sections of the holes of the respective ears.

 

Same patents:

Bridge denture // 2149600

The invention relates to medicine, namely to prosthetic dentistry, and relates to a method of manufacturing bridges dentures

Bridge denture // 2026651
The invention relates to medicine, namely to prosthetic dentistry and for the design of bridges dentures
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