US3720959A - Mandibular prosthetic apparatus - Google Patents

Mandibular prosthetic apparatus Download PDF

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US3720959A
US3720959A US3720959DA US3720959A US 3720959 A US3720959 A US 3720959A US 3720959D A US3720959D A US 3720959DA US 3720959 A US3720959 A US 3720959A
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member
bow
portion
sleeve
mandible
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02Prostheses implantable into the body
    • A61F2/28Bones
    • A61F2/2803Bones for mandibular reconstruction
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02Prostheses implantable into the body
    • A61F2/28Bones
    • A61F2/2846Support means for bone substitute or for bone graft implants, e.g. membranes or plates for covering bone defects
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2/30988Other joints not covered by any of the groups A61F2/32 - A61F2/4425
    • A61F2/3099Other joints not covered by any of the groups A61F2/32 - A61F2/4425 for temporo-mandibular [TM, TMJ] joints
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/80Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates
    • A61B17/8085Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates with pliable or malleable elements or having a mesh-like structure, e.g. small strips for craniofacial surgery
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2002/30001Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30108Shapes
    • A61F2002/3011Cross-sections or two-dimensional shapes
    • A61F2002/30138Convex polygonal shapes
    • A61F2002/30154Convex polygonal shapes square
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2002/30001Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30108Shapes
    • A61F2002/30199Three-dimensional shapes
    • A61F2002/30261Three-dimensional shapes parallelepipedal
    • A61F2002/30271Three-dimensional shapes parallelepipedal hollow parallelepipeds
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2002/30001Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30535Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30604Special structural features of bone or joint prostheses not otherwise provided for modular
    • A61F2002/30607Kits of prosthetic parts to be assembled in various combinations for forming different prostheses
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2/30767Special external or bone-contacting surfaces, e.g. coating for improving bone ingrowth
    • A61F2/30907Nets or sleeves applied to surface of prostheses or in cement
    • A61F2002/30909Nets
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2230/00Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2230/0002Two-dimensional shapes, e.g. cross-sections
    • A61F2230/0017Angular shapes
    • A61F2230/0021Angular shapes square
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2230/00Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2230/0063Three-dimensional shapes
    • A61F2230/0082Three-dimensional shapes parallelepipedal
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2250/00Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2250/0058Additional features; Implant or prostheses properties not otherwise provided for
    • A61F2250/006Additional features; Implant or prostheses properties not otherwise provided for modular
    • A61F2250/0062Kits of prosthetic parts to be assembled in various combinations for forming different prostheses

Abstract

A kit for forming a number of different forms of prosthetic devices to replace different portions of a mandible which have been removed. The kit includes a number of prefabricated members, fabricated from a malleable stainless steel mesh, including mating inner and outer tubular sleeve portions for assembling adjoining members, with the sleeve portions being crimped together to define rigid couplings. Screws are used to attach the end member of an assembled prosthetic device to the bone stump of the remaining mandible.

Description

United States Patent 91 Hahn [ 1March 20, 1973 [54] MANDIBULAR PROSTHETIC APPARATUS [76] Inventor: George W. Hahn, 1605 Pentagon Parkway, Dallas, Tex. 75224 [22] Filed: Aug. 26, 1970 [21] App]. No.: 67,029

[52] US. Cl. ..3/1, 128/92 C [51] Int. Cl. ..A6lf l/24 [58] Field of Search ..3/l; 128/92 R, 92 C, 89 A, 128/334 R, 334 C; 32/]; 29/515, 516

[56] References Cited UNITED STATES PATENTS 2,121,558 6/1938 Coe et a1. ..29/5l6 2,752,179 6/1956 Le Febvre ..29/5 16 X Simpson ..29/516 X OTHER PUBLICATIONS 7 Chrome Cobalt Mesh Mandibular Prosthesis by G. W. Hahn et al., Journal of Oral Surgery, Vol. 27, Jan.

1969, pages 5-10.

Vitallium Mesh Mandibular Prosthesis, by G. W. Hahn, Journal of Prosthetic Dentistry, Vol. 14, No. 4, July-Aug. 1964, pages 777-784.

Primary Examiner-Richard A. Gaudet Assistant Examiner-Ronald L. Frinks Attomey Cecil L. Wood [5 7] ABSTRACT A kit for forming a number of different forms of prosthetic devices to replace different portions of a mandible which have been removed. The kit includes a number of prefabricated members, fabricated from a malleable stainless steel mesh, including mating inner and outer tubular sleeve portions. for assembling adjoining members, with the sleeve portions being crimped together to define rigid couplings. Screws are used to attach the end member of an assembled prosthetic device to the bone stump of the remaining mandible.

12 Claims, 16 Drawing Figures PATENTEBMARZO ms 3. 720.959

SHEET 2 [)F 6 Fig.3

INVENTOR. George W. Hahn ATTORNEY PATENTEDMARZO I975 3, 720 959 SHEET 3 BF 6 Fig.5

- INVENTOR. George W Hahn ATTORNEY PATENTEDMARZO ma 3.720.959 SHEET u 0F 6 INVENTOR George W. Hahn BY fi ATTORNEY PAIENTEDmzo I975 SHEET 5 OF 6 INVENTOR.

1 4 h A H wfi m w/ w M m F v Fig. I3

ATTORNEY PATENTEU MA=R20 k975- 3. 720,959- SHEET 6 OF 6 INCORRECT FLAIR LE IN PART 8*! METHOD FOR CORRECTING MAND/BULAR FLAIRIN PART 8-! INVENTOR. George W. Hahn ATTORNEY MANDHWULAR IItGSTIiIETIC APPARATUS BACKGROUND AND SUMMARY OF THE INVENTION invention is an improvement of apparatus described in an article entitled Chrome Cobalt Mesh Mandibular Prosthesis published in Journal of Oral Surgery, Vol.

27, Jan. 1969, by Donald A. Corgill, M.D., and the inface. Another disadvantageof this apparatus was that adjustability was provided in some cases by overlapping sleeve portions which produced abrupt edges in the assembled prosthetic device, again sometimes piercing I the surface tissues.

An object of this invention is to provide an improved mandibular prosthetic apparatus for restoration or replacement of all or a part of a mandible.

Another object of this invention is to provide man dibular prosthetic apparatus including a kit of prefabricated parts which may be assembled in various combinations to replace substantially all mandibles lost.

A further object of this invention is to provide mandibular prosthetic apparatus consisting of a kit of prefabricated parts, which may be assembled in various combinations and rigidly coupled to provide a unitary prosthetic device without the use of screws except'at the point of attachment to the mandible bone stump.

Still another object of this invention is to provide a mandibular prosthetic apparatus including a kit of prefabricated parts, which may be assembled to form a 1 desired prosthetic device having a relatively smooth contour and eliminating sharp projections which tend to pierce the facial tissues.

A still further object of this invention is to provide a mandibular prosthetic apparatus which provides improved support for the facial tissues.

Apparatus according to the invention for accom plishing these objects includes, broadly, an assembly of members fabricated of malleable mesh including, at least, a bow member for replacing portions of the main body area of the mandible and a member for supporting one end of the bow member consisting of a body portion and an integral tubular extension. The bow member is elongated vertically in cross section to define an outer, tissue supporting wall. The bow member and the support member extension define respective outer and inner mating circular sleeves adapted to be crimped together to provide a rigid coupling between the members. More specifically, the support member body may include a housing for attachment to the bone stump by means of screws, or an oval tubular portion angled relative to the tubular extension to define a ramus portion ofthe prosthetic device. In another form the support member is that ofa body defining another mating outer circular sleeve, whereby the support member and bow member may be joined by a mating inner circular sleeve received in the adjoining outer circular sleeves of "the bow member and support member.

The novel features and the advantages of the invention, as well as additional objects thereof, will be understood more fully from the following description when read in connection with the accompanying drawings.

DRAWINGS FIGS. l and 2 are respective side and front views of a human sltull to illustrate the parts of the mandible;

FIG. 3 is an illustration of the several members which are assembled in various combinations to form prosthetic devices;

FIG. 4 is a perspective view of a mandible consisting of the natural posterior portions of the mandible and a prosthetic anterior bow portion;

FIG. 5 is a perspective view of a mandible in which a relatively small section of the main body and bow area is replaced with a prosthetic device;

FIG. 6 is a perspective view of a mandible consisting of a right half portion of the natural mandible and the left half portion being a prosthetic device;

FIG. 7 is a perspective view of a mandible wherein only the posterior portion on one side consists of the original mandible, the remainder of the mandible consisting of a prosthetic device;

FIGS. 8 and 9 are perspective views of two of the members illustrated in FIG. 3;

FIGS. 10, 12, 13 and 14 are transverse sectional views of portions of the prosthetic assemblies illustrated in FIGS. 4, 5 and 6, to show the assembled relationship of certain of the members illustrated in FIG. 3;

FIG. 11 is a sectional view taken along the line 11- l l of FIG. '7 illustrating structural details of the condyle member; and

FIGS. 15 and 16 are diagrammatic illustrations of means for compensating for differences in the mandibular flair angle.

DESCRIPTION OF THE PREFERRED EMBODIMENT Referring to FIGS. 1 and 2 for orientation, the portions of the natural mandible which will be referred to are the main body, which is the anterior portion of the mandible, and the ramus and condyle which are the posterior portions of the mandible. The main body includes a bow area which is the anterior relatively sharply curved portion defining the chin, and posterior relatively straight portions extending rearwardly from the bow area at a diverging angle. The ramus extends upward from the main body, as viewed from the side in FIG. 1, forming an angle with the main body. The condyle at the upper end of the ramus includes an articulating prominence forming a portion of the tempromandibular joint.

The mandibular flair is the angle defined by the straight portions of the main body, and the angle of the main body bow area is a complex angle, since it is a function both of the mandibular flair and of the angle of the ramus relative to the main body, which angle varies considerably with different individuals.

Referring now to FIG. 3, there are shown several members of a kit, including different configurations of remove. fabricated of a malleable metal mesh, particularly mesh certain of these members. These kit members are as- Y sembled in combinations to be described to provide a variety of forms of prosthetic devices for restoring various portions of a mandible which it is necessary to All the members to be described are curved in a generally U-shaped form to replace the main body of the natural mandible. This member has a I fixed flair angle; and means will be described subsequently for changing the flair angle; The cross section of the bow member is best illustrated in FIG. 13

. wherein it is seen that the member has an elongated cross section, the major axis of elongation being trans-, verse to the plane of the member and, therefore,

I generally vertical in use. As best seen in FIG. 13, the

bow member includes a relatively flat outer wall 10, with the opposite inner wall being depressed inwardly to define a double tube configuration which includes a lower socket portion 11, which is circular in cross section and which is referred to as an outer mating circular sleeve. This socket portion 11 extends the entire length of the bow member, since all or various portions thereof are employed in the various forms of devices to be described. The upper tubular rib portion 12 may be circular and may be smaller in cross section.

'A retention member A1 is one form of bow support member for supporting and attaching one end of a bow member-to a remaining bone stump of a mandible. This member is used for attaching the bow member to a remaining straight portion of the'main body; and the configuration of the retention member A-l is the same for use on either side of the mandible. The structure of the retention member A-l is shown more clearly in .FIG. 9 to include an elongated body portion 14 defined by confronting side walls joined by a curved bottom wall and one end wall. An elongated tubular portion 15 extends longitudinally from the end wall, and is attached integrally to the end wall adjacent to the bottom wall. The tubular portion 15 is circular in cross section and has an outer predetermined diameter dimensioned for a sliding fit with the outer mating circular sleeve 11 defined by the bow member B -1. This tubular member will be referred to'as inner mating circular sleeve," and these inner and outer circular sleeves are dimensioned to coact with each other in a manner that they may be crimped together to define a rigid coupling or joint between the respective bow and retention members.

Ramus members R-l, R-Z, R-3 and R-4, as best shown in FIG. 3, are members intended to replace the ramus portion of the natural mandible; and these members differ from each other in the angle between an upward extending, elongated tubular portion 19. Referring to the ramus member R2 for example, the tubular body portion 18 has an elongated oval cross section, as

' best seen in FIG. 10, and this portion has a predetermined configuration and dimension to define an inner mating oval sleeve. The tubular portion 19 of circular cross section extends at a predetermined angle relative to the body portion 18 to define the angle between the ramus member and bow member for a particular prosthetic device. A particular ramus member is selected relative to the desired angle. The tubular pro- 5 jection 19 then defines an inner mating circular sleeve for mating engagement with the outer mating circular sleeve of the bow member B-l.

Condyle members C-lL and C-lR have similar and related configurations corresponding to the natural left and right condyle portions of the natural mandible. Referring particularly to the member C-lL as illustrated in the drawings, this member includes a tubular body 21 having an elongated oval cross section, as best seen in FIG. 10. The upper end of the'body 21 is en larged, and there is attached to the upper end adjacent the posterior edge thereof an artificial condyle 22, which is preferably fabricated of an acrylic resin, for example, and which corresponds to the natural condyle or condyloid process which is a part of the tempromandibular joint.

Another protuberance 23 is formed at the upper end of the body 21 adjacent to the anterior edge representing the coronoid process of the natural mandible. The tubular body 21 has a predetermined configuration and dimension for a sliding fit over the tubular body portion 18 of a ramus member, and the tubular body 21 is further referred to as outer mating oval sleeve. The inner mating oval sleeve of the ramus member and the outer mating oval sleeve of the condyle member then are slidably related, as best seen in FIG. 10, to adjust the length of the ramus condyle portion of a prosthetic device, and these sleeves are crimped together to form a rigid coupling between the respective members. Ad-

screws.

FIG. 11 illustrates how the artificial acrylic resin condyle 22 is formed about and thereby secured to a portion of the body 21 of the condyle member C-lL.

Retention members A2R and A-2L are examples of another form of bow support member for securing the bow member to the stump of the mandible bone. Referring particularly to the member A-2L, which is more particularly illustrated in FIGS. 8 and 14 of the drawing, this member consists of a boxlike elongated curved body 25 formed of confronting side walls, a curved connecting bottom wall, and one end wall. This member defines a box having one open end and an open top for receiving a portion of the mandible bone stump in the bow area, and to which the member is secured preferably by means of tapered screws. The curved bottom wall of the body 25 is particularly formed to define a socket 26 formed by walls of circular cross section having an angular extent of approximately Access to the socket 26 is provided through a circular recess 27 provided in the body end wall and aligned with the socket. The socket walls and the opening 27 have a predetermined dimension to define an outer mating circular sleeve, dimensioned to correspond to that of the bow member 13-1.

The bow member and the retention member A-2L are joined by a curved connector member S-1 or 8-2, as illustrated in the drawings. These connector members are similar, differing only in length and degree of curvature. The connector member 8-2, for example, is

a uniformly curved tubular member of circular cross section having a diameter corresponding to those of the circular tubular projections of the ramus members and of the retention member A-l. The connector member S-2 then may be referred to as an inner mating circular sleeve for mating engagement with the outer mating circular sleeves of the retention member A-2L and the bow member B-l for example.

. The lip member L-l, seen in FIGS. 3 and 12, is an elongated actuate member of curved U-shaped cross section dimensioned to receive the upper rib portion 12 of the bow member B-1 and to be crimped thereto to define a rigid connection therewith. The lip member L-1 provides a flat forward or outer wall 29 which defines an upward extension of the flat outer wall of the bow member, to provide additional support for the lip in the bow area of the prosthetic device.

FIGS. 4, 5, 6 and 7 illustrate, by way of example, several forms of mandibular prosthetic devices or apparatus which are formed from various assemblies or combinations of the members illustrated in FIG. 3.

Referring to FIG. 4, there is shown an anterior bow prosthetic device to replace most of the main body portion of the mandible. As seen in the drawing, the ramus-condyle portions of the natural mandible remain with short posterior stumps of the straight portions of the main body. The anterior bow prosthetic device consists of two retention members A-l which are secured to the two main body stumps, a bow member 8-1 which is fitted over the inner mating circular sleeve of the retention members A1, and a lip member L-l forming an additional support'for the lip of the patient in the bow area. As seen in the drawing, the lower portions of the mandible stumps are received within the bodies of the retention members A-1; and these members are secured to the bone by means of screws which are preferably tapered and fabricated of No. 316 Stainless Steel. The manner of coupling of the bow member B-l to a retention member A-l is best seen in FIG. 13 wherein the inner mating circular sleeve 15 of the retention member is slidably received within the outer mating circular sleeve 11 of the bow 8-1. These circular sleeves are then crimped together to provide a rigid joint or coupling between the members A-1 and 8-1.

The assembled relation of the lip member L-l to the bow member B-l is best seen in FIG. 12, which is a transverse sectional view of the assembled members. As seen in FIG. 12, the flat wall 29 of the lip member defines an extension of the flat wall 10 of the bow member, and the lip member is crimped over the rib section 12 of the bow member to define a rigid coupling between these members.

For the prosthetic device illustrated in FIG. 4, the bow member B1 is formed to provide the correct configuration and flair angle for this particular prosthetic device.

FIG. 5 illustrates a sectional prosthetic device for a relatively small section of the main body of the mandible which has been removed. This prosthetic device includes one of the above-described retention members A-1 and a portion of a bow member B-l which has been cut to an appropriate size to include a straight portion and a portion of the bow area of the main body of the mandible which has been removed. The anterior end of the prosthetic device is secured to the existing bow area portion of the mandible by means of a retention member A2L and a sleeve member 5-2. The body portion 25 of the retention member A-ZL is secured to v the bone stump by means of tapered screws in a manner similar to that of the member Al.

FIG. 14 of the drawing, which is a transverse sectional view through the retention member A-2L adjacent to its end wall, illustrates the manner in which the bow member is jointed to the retention member. As seen in FIGS. 5 and 14, the sleeve member 8-2, which defines an inner mating cylindrical sleeve is received within the sockets 11 and 26, respectively, of the bow member and retention member which define outer mating circular sleeves; and the sleeve member spans the sockets which are crimped around the sleeve member to form the necessary rigid coupling between the bow member 8-] and the retention member A-2L. As seen in FIG. 5, a portion of the bone stump, within the body of the retention member A-2L, is cutaway to form a notch 28 for the purpose of accommodating the end of the sleeve member 8-2 which is received within the retention member body.

Since the anterior end of this particular prosthetic device is joined to the existing mandible in the bow area, the retention member A-2L, along with a selection of sleeve members such as 8-1 and 8-2, provides greater flexibility in fitting the prosthetic device to the particular patient.

FIG. 6 of the drawing illustrates a hemi-section prosthetic device which replaces approximately onehalf of the natural mandible. This prosthetic device in cludes a retention member A-2L, a bow member B-1 which is approximately one-half of the bow member illustrated in FIG. 3 and which is joined to the retention member by a sleeve member S-2, and a ramus member R-2 and a condyle member C-lL which form the left side ramus-condyle portion of the prosthetic device.

The anterior portion of this device is assembled and joined in the same manner as the device of FIG. 5. The ramus portion of the device which forms the angle of the prosthetic mandible is provided by selecting a ramus member R-2 with an appropriate angle. This member is joined to the bow member by inserting the inner mating circular sleeve. 19 into the outer mating circular sleeve of the bow member B-l, these sleeves being crimped to define the rigid coupling as above described. The tubular oval body portion 18 extends upwardly and defines the inner mating oval sleeve which is received within the outer mating oval sleeve 21 of the condyle member C-lL; and when these members are adjusted to provide the desired length or height of the ramus-condyle section for the particular patient, these sleeves are screwed or crimped together to provide the rigid coupling. The sliding relation of the oval sleeves is best illustrated in FIG. 10.

FIG. 7 of the drawing illustrates a three'quarter section prosthetic device for replacing all of the natural mandible except the right side ramus-condyle portion and the small stump of the main body. For this device, the left hand ramus-condyle section is formed in the same manner as described with respect to the device of FIG. 6, a ramus member R-3 being shown to provide a slightly different angle for the ramus portion. FIG. 11 is a sectional view through the condyle member C-lL and illustrates the manner in which the acrylic resin condyle 22 is secured to the body 21 of the condyle member. The acrylic resin condyle 22 is preferably cast or otherwise formed to duplicate as nearly as possible the configuration of the natural condyle which is being replaced.

In the device of FIG. 7, a substantial length of the bow member B1 is used, and since the bow member is secured to a straight portion of the mandible main body on the right side, a retention member A-l is used in the same manner as for the prosthetic device of FIG. 4.

It will become apparent, upon considering the threequarter section prosthetic device of FIG. 7, that a full prosthetic mandible can be assembled by providing an additional artificial ramus-condyle portion for the right hand side of the prosthetic device illustrated in FIG. 7.

FIGS. and 16 of the drawing are diagrammatic illustrations of an anterior bow prosthetic device as illustrated in FIG. 4, composed of a bow member 8-1 and two retention members A-l. FIG. 15 illustrates the situation where the particular bow member 8-1, as fabricated, has a much smaller flair angle than that required for the particular patient. FIG. 16 illustrates the manner of adjusting the flair angle, which consists in severing the bow member B-l at the midline of the bow area, and then rejoining the abutting severed ends at a different angle by providing a suitable sleeve member 8-2 which is received in the sockets ll of the adjacent abutting ends. These members are then crimped together, as described previously, to provide a new rigid bow member assembly having the desired flair angle.

A method for forming a mandibular prosthetic device, as described above may include the steps:

providing an elongated curved bow member having an elongated socket portion defining an outer mating circular sleeve, for replacing various sections of the straight and curved areas of the main body of the mandible;

providing a first support member, for one end of the bow member, having a body and a projecting tubular portion defining an inner mating circular sleeve for a sliding fit with the bow member outer sleeve;

providing the first support member with a body for either anchoring the support member to a bone stump or defining a ramus-condyle portion of the prosthetic device for replacing the natural ramus and condyle; wherein the anchoring body may be provided with a socket portion defining an outer mating circular sleeve for receiving a separate mating sleeve member, to define the projecting inner matingcircular sleeve;

providing a second support member, for the other end of the bow member, having a body and a projecting tubular member defining an inner mating circular sleeve for a sliding fit with the bow member outer sleeve;

providing the second support member with a body for either anchoring the support member to a bone stump or defining a ramus-condyle portion of the device for replacing a natural ramus and condyle; wherein the anchoring body may be provided with a socket portion defining an outer mating circular sleeve for receiving a separate mating sleeve member, to define the projecting inner matingcircular sleeve;

assembling the bow member mating sleeve with the respective support member mating sleeves; and crimping the sleeves together to form a rigid assembly of the members.

What has been described is a novel mandibular prosthetic apparatus, and method for forming such apparatus, having a number of advantages over devices and apparatus previously used for this purpose. A particular feature and advantage of the apparatus and method described is the mating sleeve construction wherein the several members of a prosthetic device are assembled together by means of mating inner and outer sleeves which may be crimped together to provide the desired rigid coupling between adjoining parts and, ultimately, a rigid integral prosthetic device suitably formed to mate with the remaining portions of the natural mandible.

A related feature and advantage of the described apparatus and method is that the portions of the prosthetic devices to which the facial tissue will adhere are the defined outer mating sleeve portions, with the members being joined by the inner mating sleeves, to minimize or eliminate sharp edges of the prosthetic device which may pierce the surface tissues.

Another feature of the described apparatus is that the bow member is formed to provide an elongated, or double tubular cross section, thereby defining a flat outer wall surface for better support of the tissues in the main body area. An ancilliary feature is the provision of a lip member to provide additional tissue support area in the bow area of the prosthetic device.

Another feature of the apparatus is that the bow member may be severed and reassembled through the use of an interior joining sleeve to adjust the flair angle of the bow member and thereby adapt the device to the particular patient.

While a preferred embodiment of the invention has been illustrated and described, it will be understood by those skilled in the art that changes and modifications may be resorted to without departing from the spirit of the invention or the scope of the appended claims.

What is claimed is:

l. Mandibular prosthetic apparatus comprising, in combination:

an assembly of members fabricated of a malleable mesh;

a bow member for replacing at least portions of the main body of a mandible; said bow member comprising an elongated curved member, elongated in cross section, and formed to include an elongated cylindrical socket portion along one edge thereof defining an outer mating circular sleeve;

a first bow support member comprising a body portion and a tubular portion extending therefrom; said tubular portion defining an inner mating circular sleeve dimensioned for sliding fit with the outer mating circular sleeve of the bow member;

said bow member outer mating sleeve fully receiving and enclosing said support member inner mating sleeve, for coupling said members.

2. The invention set forth in claim 1 including an elongated curved lip member having a U-shaped cross section; said lip member dimensioned to partially enclose the bow member to define a lateral extension of the bow member cross section in the bow area.

3. The invention set forth in claim 1 wherein said first bow support member defines a retention member for securing the bow member to a mandible stump; said support member body portion being formed to enclose a portion of the mandible stump for attachment thereto.

4. The invention set forth in claim 1 wherein said first bow support member comprises a ramus-condyle member for replacing the ramus and condyle of the mandible; the body portion of said ramus-condyle member being elongated and having means for attaching an artificial condyle at the end remote from the tubular extension portion.

5. The invention set forth in claim 4 wherein said tubular extension portion extends at an angle relative to said elongated body portion.

6. The invention set forth in claim 1 wherein said first bow support member comprises a ramus-condyle assembly including a ramus member and a condyle member;

said ramus member comprising an elongated tubular body portion of elongated cross section, defining an inner mating oval sleeve, and said tubular extension portion, defining said inner mating circular sleeve;

said condyle member comprising an elongated tubular body of elongated cross section, defining an outer mating oval sleeve, and an artificial condyle attached to one end of said tubular body;

said outer mating oval sleeve being dimensioned for a sliding fit with said inner mating oval sleeve and receiving and enclosing said inner oval sleeve to provide a rigid coupling between the ramus and condyle members.

7. The invention set forth in claim 6 wherein said tubular extension portion of said ramus member extends at an angle relative to the elongated tubular body portion of said member; and wherein said outer and inner oval sleeves are deformed in interfering relation to provide the rigid coupling between the ramus and condyle members.

8. The invention set forth in claim 1 including asecond bow support member defining a retention member for securing the bow member to a mandible stump in the bow area of a mandible;

said second bow support member comprising a body formed to enclose aportion of the mandible stump for attachment thereto; said body including a socket portion defining an outer mating circular sleeve;

and a connector member comprising an elongated curved tubular member of circular cross section, defining an inner mating circular sleeve dimensioned for a sliding fit with the outer mating circular sleeves of the bow member and the second support member; said connector member being fully enclosed within said outer mating sleeves to couple said bow member to said second support member.

9. The invention set forth in claim 1 wherein said first bow support member defines a retention member for securing the bow member to a bone stump in the bow area of the mandible; said how support member comprising a body formed to enclose a ortion of the mandible stump for at tachment hereto; said body including a socket portion defining an outer mating circular sleeve;

and a connector member comprising an elongated curved tubular member of circular cross section, defining an inner mating circular sleeve dimensioned for a sliding fit with said socket portion outer mating circular sleeve; said connector member defining said bow support member tubular portion.

10. The invention set forth in claim 1 wherein said bow member is severed to provide two abutting segments; and a curved connector member comprising an elongated curved tubular member of circular cross section dimensioned to define an inner mating circular sleeve for sliding fit with the outer mating circular sleeves of the two bow member segments, with the connector member being fully received in and enclosed by said bow member segments to couple said segments.

1]. The invention set forth in claim 1 said inner and outer mating sleeves being deformed in interfering relation to provide a rigid coupling between the respective members.

12. The invention set forth in claim 10 said curved connector member and said bow member segments being deformed in interfering relation to provide a rigid coupling between th bow member segments.

Claims (12)

1. Mandibular prosthetic apparatus comprising, in combination: an assembly of members fabricated of a malleable mesh; a bow member for replacing at least portions of the main body of a mandible; said bow member comprising an elongated curved member, elongated in cross section, and formed to include an elongated cylindrical socket portion along one edge thereof defining an outer mating circular sleeve; a first bow support member comprising a body portion and a tubular portion extending therefrom; said tubular portion defining an inner mating circular sleeve dimensioned for sliding fit with the outer mating circular sleeve of the bow member; said bow member outer mating sleeve fully receiving and enclosing said support member inner mating sleeve, for coupling said members.
2. The invention set forth in claim 1 including an elongated curved lip member having a U-shaped cross section; said lip member dimensioned to partially enclose the bow member to define a lateral extension of the bow member cross section in the bow area.
3. The invention set forth in claim 1 wherein said first bow support member defines a retention member for securing the bow member to a mandible stump; said support member body portion being formed to enclose a portion of the mandible stump for attachment thereto.
4. The invention set forth in claim 1 wherein said first bow support member comprises a ramus-condyle member for replacing the ramus and condyle of the mandible; the body portion of said ramus-condyle member being elongated and having means for attaching an artificial condyle at the end remote from the tubular extension portion.
5. The invention set forth in claim 4 wherein said tubular extension portion extends at an angle relative to said elongated body portion.
6. The invention set forth in claim 1 wherein said first bow support member comprises a ramus-condyle assembly including a ramus member and a condyle member; said ramus member comprising an elongated tubular body portion of elongated cross section, defining an inner mating oval sleeve, and said tubular extension portion, defining said inner mating circular sleeve; said condyle member comprising an elongated tubular body of elongated cross section, defining an outer mating oval sleeve, and an artificial condyle attached to one end of said tubular body; said outer mating oval sleeve being dimensioned for a sliding fit with said inner mating oval sleeve and receiving and enclosing said inner oval sleeve to provide a rigid coupling between the ramus and condyle members.
7. The invention set forth in claim 6 wherein said tubular extension portion of said ramus member extends at an angle relative to the elongated tubular body portion of said member; and wherein said outer and inner oval sleeves are deformed in interfering relation to provide the rigid coupling between the ramus and condyle members.
8. The invention set forth in claim 1 including a second bow support member defining a retention member for securing the bow member to a mandible stump in the bow area of a mandible; said second bow support member comprising a body formed to enclose a portion of the mandible stump for attachment thereto; said body including a socket portion defining an outer mating circular sleeve; and a connector member comprising an elongated curved tubular member of circular cross section, defining an inner mating circular sleeve dimensioned for a sliding fit with the outer mating circular sleeves of the bow member and the second support member; said connector member being fully enclosed within said outer mating sleeves to couple said bow member to said second support member.
9. The invention set forth in claim 1 wherein said first bow support member defines a retention member for securing the bow member to a bone stump in the bow area of the mandible; said bow support member comprising a body formed to enclose a portion of the mandible stump for attachment thereto; said body including a socket portion defining an outer mating circular sleeve; and a connector member comprising an elongated curved tubular member of circular cross section, defining an inner mating circular sleeve dimensioned for a sliding fit with said socket portion outer mating circular sleeve; said connector member defining said bow support member tubular portion.
10. The invention set forth in claim 1 wherein said bow member is severed to provide two abutting segments; and a curved connector member comprising an elongated curved tubular member of circular cross section dimensioned to define an inner mating circular sleeve for sliding fit with the outer mating circular sleeves of the two bow member segments, with the connector member being fully received in and enclosed by said bow member segments to couple said segments.
11. The invention set forth in claim 1 said inner and outer mating sleeves being deformed in interfering relation to provide a rigid coupling between the respective members.
12. The invention set forth in claim 10 said curved connector member and said bow member segments being deformed in interfering relation to provide a rigid coupling between the bow member segments.
US3720959D 1970-08-26 1970-08-26 Mandibular prosthetic apparatus Expired - Lifetime US3720959A (en)

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