Dentistry – Prosthodontics – Dental implant construction
Patent
1998-08-12
2000-10-17
Manahan, Todd E.
Dentistry
Prosthodontics
Dental implant construction
623 16, A61F 200
Patent
active
061322148
DESCRIPTION:
BRIEF SUMMARY
This application was filed as international patent application PCT/EP96/05506 on Dec. 10, 1996.
INTRODUCTION AND BACKGROUND
The present invention concerns a medical implant that is intended to be inserted into a space with a prespecified dimension and to be filled and a process for producing the medical implant.
It is known that in cases of extraction wounds bones change in such a way that the space that exists due to the extraction wound can no longer be filled by an implant whose dimension and shape corresponds exactly to the extracted hard connective tissue after a certain time period.
A loss of a tooth that arises through a trauma when the tooth is unfavorably fractured and the root fragments cannot be saved can be mentioned as an example. Consequently, one must extract the fractured tooth and its root fragments. As a replacement one has been using a bridge or removable prothesis for a long time. They have the disadvantage of involving the neighboring teeth during anchoring, and if necessary, of having to be worked on. To eliminate this disadvantage one sometimes uses immediate implants instead of the lost tooth. Because up to now they have only consisted of prefabricated, standardized alloplastic materials, the extraction sockets cannot be filled by the immediate implants, which must exactly match. As a result, hollow spaces necessarily exist between the end of the socket and the implant. During the healing process these hollow spaces are filled by quickly growing connective tissue, which prevents the complete osseo-integration of the prefabricated, standardized implants. Therefore a large share of the immediate implants that have been used up to now is again lost.
As one knows, the consequence for the loss of a tooth is the atrophy of the bone in the area of the extraction socket. All bone loss in the jaw area is extremely unfavorable for the subsequent replacement of the lost tooth. Through the loss of bone volume a later implantation of a synthetic tooth root--i.e., an enossal implant--becomes difficult. Because even when the extraction wound undergoes a normal healing process some substance from the jaw bone in the area of the jaw ridge is lost, it is impossible to place the implant in the position that corresponds exactly to that of the extracted tooth and its root. Compared with the original natural position, such an implant has been strongly shifted on a horizontal and vertical level. This fact has unfavorable aesthetic and practical effects.
Implants can also be used as a replacement for other parts of the skeleton. If, for example, the lower jaw is stricken by a tumor, the area stricken by the tumor is separated from the jaw bone and replaced by an implant. In this case as well the difficulties mentioned above occur.
SUMMARY OF THE INVENTION
The present invention is based on the technical problem of shortening the time between the loss of the hard connective tissue associated with therapy--e.g., loss of bone substance, especially after the extraction of a tooth has occurred--and the insertion of an implant in such a way that bone loss of a notable dimension cannot occur.
The present invention is especially based on the technical problem of carrying out a single therapeutic treatment of the hard connective tissue as a result of a bone resection, especially with the required extraction of a tooth, and the insertion of an exactly matching individual implant in the sense of a so-called "custom-made system" at the intended site.
This problem is solved by the present invention, which concerns a medical implant for insertion into a space with a prespecified dimension--e.g., the extraction socket--and a process for producing this implant.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1: Cast cavity in the form of an impression of the root of a tooth, with inserted mandrels
FIG. 2: Cast cavity filled with biodegradable material, with an alternative arrangement of the mandrels
FIG. 3: Implant with the mandrels not yet removed
FIG. 4: Implant according to FIG. 1, which is inserted into the jaw bone an
REFERENCES:
patent: 4051598 (1977-10-01), Sneer
patent: 4186486 (1980-02-01), Gordon
patent: 4244689 (1981-01-01), Ashman
patent: 4373217 (1983-02-01), Draenert
patent: 4671768 (1987-06-01), Ton
patent: 4842604 (1989-06-01), Dorman et al.
patent: 4863974 (1989-09-01), Mallouk et al.
patent: 4957509 (1990-09-01), Tamari et al.
patent: 5092890 (1992-03-01), Pohlemann et al.
patent: 5236971 (1993-08-01), Murry
patent: 5356629 (1994-10-01), Sander et al.
patent: 5433751 (1995-07-01), Christel et al.
patent: 5476880 (1995-12-01), Cooke et al.
patent: 5501706 (1996-03-01), Arenberg
patent: 5520923 (1996-05-01), Tjia et al.
patent: 5525646 (1996-06-01), Lundgren et al.
patent: 5531794 (1996-07-01), Takagi et al.
patent: 5552454 (1996-09-01), Kretschmann et al.
patent: 5558517 (1996-09-01), Shalaby et al.
patent: 5697981 (1997-12-01), Ison et al.
Schug Jens
Suhonen Jouko
Manahan Todd #E.
Schug Jens
Suhonen Jouko
LandOfFree
Medical implant does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Medical implant, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Medical implant will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-462678