Surgery – Instruments – Orthopedic instrumentation
Reexamination Certificate
1999-09-20
2001-02-27
Buiz, Michael (Department: 3731)
Surgery
Instruments
Orthopedic instrumentation
C606S075000, C411S005000
Reexamination Certificate
active
06193719
ABSTRACT:
The present invention relates to a threaded clamping plug for interconnecting two implants of a spinal osteosynthesis instrumentation or other implants.
In spinal osteosynthesis instrumentations heretofore employed, in particular those of the “COTREL-DUBOUSSET” type (U.S. Pat. Nos. 4,641,636 and 4,815,453), the component elements are placed in position and assembled by means of small screws. At the end of the screwing, the surgeon causes their fracture so as to remove their head, which requires cutting the rods if it is necessary to proceed to a subsequent removal of the instrumentation which is consequently rendered relatively awkward.
Further, the measurement of the clamping torques of the screws requires additional instruments the precision of which is not always satisfactory.
Objects of the invention are to provide, on one hand, an assembling element which allows an easier subsequent disassembly of the instrumentation if need be and, on the other hand, a system integrated with the plug which affords a precise predetermined clamping torque.
According to the invention, the threaded plug comprises two coaxial parts separated by a fracture initiating line, and each part is provided with a print coaxial with the other print, the first part being adapted to permit the screwing of the second threaded part on an implant up to a predetermined fracture torque between the two parts, the print provided on the second part permitting an optional subsequent unscrewing of the latter.
The threaded part may be screwed in a tapped hole provided in the corresponding implant, or on the screw thread of the body of a vertebral anchorage element (screw or hook) to ensure the connection of this element with a rod, or on a threaded rod of a transverse connection device between two longitudinal osteosynthesis rods.
It must be understood that these three embodiments of the plug according to the invention are not intended to be limitative, since the invention has a very wide scope in osteosynthesis instrumentations.
Thus, after fracture, when the prescribed torque is exceeded and the two parts are separated, the second part can be if necessary unscrewed by means of its print which is adapted to a suitable tool so that the device can be disassembled.
The magnitude of the fracture torque is a function of the depth of the fracture initiating line and can be easily adjusted to the desired magnitude. It is therefore possible to obtain for the clamping torque an improved precision relative to clamping torques employed up to the present time with the usual screws, since it is possible to determine the fracture torque in a much more precise manner than with the usual means which involve the use of a relatively imprecise torquemeter.
REFERENCES:
patent: D. 200217 (1965-02-01), Curtiss
patent: 791548 (1905-06-01), Fischer
patent: 2083054 (1937-06-01), Cline
patent: 2201087 (1940-05-01), Hallowell
patent: 2239352 (1941-04-01), Cherry
patent: 2295314 (1942-09-01), Whitney
patent: 2532815 (1950-12-01), Kindsvatter
patent: 2553337 (1951-05-01), Shafer
patent: 2778265 (1957-01-01), Brown
patent: 2877681 (1959-03-01), Brown
patent: 2927332 (1960-03-01), Moore
patent: 3115804 (1963-12-01), Johnson
patent: 3143029 (1964-08-01), Brown
patent: 3370341 (1968-02-01), Allsop
patent: 3498174 (1970-03-01), Schuster et al.
patent: 3584667 (1971-06-01), Reiland
patent: 3812757 (1974-05-01), Reiland
patent: 3963322 (1976-06-01), Gryctko
patent: 4269246 (1981-05-01), Larson et al.
patent: 4492500 (1985-01-01), Ewing
patent: 4506917 (1985-03-01), Hansen Arne
patent: 4641636 (1987-02-01), Cotrel
patent: 4763644 (1988-08-01), Webb
patent: 4764068 (1988-08-01), Crispell
patent: 4790297 (1988-12-01), Luque
patent: 4815453 (1989-03-01), Cotrel
patent: 4838264 (1989-06-01), Bremer et al.
patent: 4874275 (1989-10-01), Gotman
patent: 5005562 (1991-04-01), Cotrel
patent: 5067955 (1991-11-01), Cotrel
patent: 5073074 (1991-12-01), Corrigan et al.
patent: 5129388 (1992-07-01), Vignaud et al.
patent: 5147360 (1992-09-01), Dubousset
patent: 5154719 (1992-10-01), Cotrel
patent: 5261907 (1993-11-01), Vignaud et al.
patent: 5261912 (1993-11-01), Frigg
patent: 5282707 (1994-02-01), Palm
patent: 5312404 (1994-05-01), Asher et al.
patent: 5346493 (1994-09-01), Stahurski et al.
patent: 5364400 (1994-11-01), Rego, Jr. et al.
patent: 5382248 (1995-01-01), Jacobson et al.
patent: 5385583 (1995-01-01), Cotrel
patent: 5487742 (1996-01-01), Cotrel
patent: 5496321 (1996-03-01), Puno et al.
patent: 5499892 (1996-03-01), Reed
patent: 5507747 (1996-04-01), Yuan et al.
patent: 5562663 (1996-10-01), Wisnewski
patent: 5630817 (1997-05-01), Rokegem
patent: 5643260 (1997-07-01), Doherty
patent: 5653710 (1997-08-01), Harle
patent: 5697929 (1997-12-01), Mellinger
patent: 6004349 (1999-12-01), Jackson
patent: 3630863 (1988-03-01), None
patent: 3738409 (1989-05-01), None
patent: 0 195 455 (1986-09-01), None
patent: 0 172 130 (1987-02-01), None
patent: 0 276 153 (1988-07-01), None
patent: 0 465 158 (1992-01-01), None
patent: 246312 (1981-05-01), None
patent: 203508 (1923-09-01), None
patent: WO 92/03100 (1992-03-01), None
patent: WO 94/10927 (1994-05-01), None
patent: WO 94/10944 (1994-05-01), None
Jackson, Roger P., Declaration Under Rule 131, Jul. 24, 1998, from U.S. application No. 08/778,765, (issued as U.S. patent No. 6,004,349).
Gournay Jośe
Petit Dominique
Saurat Jean
Buiz Michael
Sofamor S.N.C.
Woo Julian W.
Woodard Emhardt Naughton Moriarty & McNett
LandOfFree
Threaded clamping plug for interconnecting two implants of a... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Threaded clamping plug for interconnecting two implants of a..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Threaded clamping plug for interconnecting two implants of a... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2611907