EP0807426A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Acetabular trial
Assignee: DePuy Products Inc
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Filing: 1997-05-16
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Granted: —
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Expires: 2017-05-16
Abstract
Abstract An acetabular trial insert is provided in which the appropriate anteversion angle of the acetabular cup of a hip prosthesis may be determined automatically by placing an inner cup within an outer cup and providing a mechanism which will hold the inner cup in position after the trial has been reduced and the hip rotated through an intended range of motion.
Inventors
- 👤 John W. Besemer
- 👤 Salvatore Caldarise
- 👤 Frank R. Foley
- 👤 C.M. Jayashankar
- 👤 Allan Ritchie
- 👤 Anthony Sanders
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-25 19:22
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/46; A61F2/4684; A61B; A61B17/00; A61B17/16; A61B17/1659; A61F2/32; A61F2/36; A61F2/3662; A61F2/4603; A61F2/4609; A61F2002/30001; A61F2002/30316; A61F2002/30329; A61F2002/30331; A61F2002/30354; A61F2002/30362; A61F2002/30364; A61F2002/30365; A61F2002/30383; A61F2002/3039; A61F2002/30398; A61F2002/304; A61F2002/30403; A61F2002/30476; A61F2002/30494; A61F2002/30505; A61F2002/30535; A61F2002/30537; A61F2002/30538; A61F2002/30565; A61F2002/30571; A61F2002/30604; A61F2002/30616; A61F2002/30617; A61F2/30767; A61F2/30771; A61F2002/30772; A61F2002/30777; A61F2002/3079; A61F2002/3082; A61F2/34; A61F2002/3401; A61F2002/3403; A61F2002/3445; A61F2002/3448; A61F2/3609; A61F2002/3611; A61F2002/3625; A61F2002/3631; A61F2002/365; A61F2220/00; A61F2220/0025; A61F2220/0033; A61F2250/00; A61F2250/0004; A61F2250/0006; A61F2250/0058; A61F2250/0096; A61F2250/0097
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
59 words
A acetabular trial system for use in prosthetic hip implantation surgery, said system comprising: an outer shell for placement on an acetabulum of a patient; an inner cup for placement within said outer shell; and a fixation device to rotatably fix said inner cup within said outer cup to permit said inner cup to rotate about a selected axis.
Claim 2
Dependent Claim
29 words
The system of claim 1 further comprising: a restriction device engaging said inner cup with said outer shell to restrict the rotation of said inner cup about said axis.
Claim 3
Dependent Claim
26 words
The trial system of claim 2 wherein said restriction device further comprising a spring-loaded ratchet for incrementally permitting rotation of said inner cup about said axis.
Claim 4
Dependent Claim
19 words
The trial system of claim 1 wherein said selected axis is the transverse axis perpendicular to the sagital plane.
Claim 5
Dependent Claim
17 words
The trial system of claim 4 further comprising an anteversion angle indicator located on said inner cup.
Claim 6
Dependent Claim
14 words
The trial system of claim 1 wherein said selected axis is the longitudinal axis.
Claim 7
Dependent Claim
43 words
The trial system of claim 1 comprising a plurality of said inner cups having a plurality of inner cup diameters; wherein a said inner cup having a preferred diameter may be selected from said plurality of inner cups for a hip trial reduction.
Claim 8
Dependent Claim
82 words
The trial system of claim 1 further comprising: a middle cup positionable within said outer shell between said outer shell and said inner cup, said middle cup having an outer diameter; wherein said outer shell has an inner diameter, said outer diameter of said middle cup fitting within said inner diameter of said outer shell; and wherein said fixation device rotatably couples said inner cup with said middle cup to permit said inner cup to rotate with respect to said middle cup.
Claim 9
Dependent Claim
50 words
The trial system of claim 8 further comprising: a plurality of said outer shells having a plurality of outer diameter sizes, wherein said inner diameter of each of said outer shell is uniform in size with the inner diameter of each of the other of said plurality of outer shells.
Claim 10
Dependent Claim
60 words
The trial system of claim 8 further comprising a reference pin wherein said outer shell, middle cup and inner cup each comprise an opening for receiving said pin; wherein each said opening is aligned with the other said openings so that said pin may be passed therethrough and into bone of an acetabulum in which said outer shell is placed.
Claim 11
Dependent Claim
54 words
The trial system of claim 10 wherein said inner cup is orientable about a transverse axis defining a range of anteversion angles; and wherein said openings in said middle cup and outer shell permit movement of said pin in said openings of said middle cup and said outer shell throughout said range of angles.
Claim 12
Dependent Claim
43 words
The trial system of claim 8 comprising a plurality of said inner cups having a plurality of inner cup diameters; wherein a said inner cup having a preferred diameter may be selected from said plurality of inner cups for a hip trial reduction.
Claim 13
Dependent Claim
60 words
The trial system of claim 1 further comprising a reference pin; wherein said outer shell and inner cup each comprise an opening for receiving said pin wherein each said opening is aligned with the other of said openings so that said pin may be passed therethrough and into the bone of an acetabulum into which said outer shell is inserted.
Claim 14
Dependent Claim
104 words
The trial system of claim 1 further comprising a reference pin; wherein said outer shell and inner cup each comprise an opening for receiving said pin wherein each said opening is aligned with the other of said openings so that said pin may be passed therethrough and into the bone of an acetabulum into which said outer shell is inserted; wherein said inner shell is rotatable about a selected axis defining a range of cup placement angles with respect to said axis; and wherein said openings align throughout said range so that said reference pin may be inserted through said openings throughout said range.
References Cited (Backward Citations)
No citation records indexed.
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