A new digital preoperative planning method for total hip arthroplasties.
Preoperative templating is an important part of a THA. The ability to accurately determine magnification of the hip on the radiograph and apply identical magnification to the radiograph and template will improve accuracy of preoperative templating of THA. We designed a templating method using a new way of determining the hip magnification with a linear relationship between magnification of the hip and the reference object on top of the pubis symphysis; the relationship was determined on 50 radiographs. We then compared our method with two other templating methods: an analog method assuming an average hip magnification of 15% and a digital method determining the hip magnification with a one-to-one relationship between the reference object and the hip. All methods were reproducible. Uniform undersizing occurred when templating with the digital method based on the one-to-one relationship; the analog method best predicted the implanted prosthesis size, closely followed by our new digital templating method; the new method will be particularly applicable for preoperative THA when analog methods are replaced by digital methods.
Crooijmans
Hendrikus J A
HJ
Clinical Physics Department, Máxima Medical Center, Eindhoven/Veldhoven, The Netherlands. H.J.A.Crooijmans@gmail.com
Laumen
Armand M R P
AM
van Pul
Carola
C
van Mourik
Jan B A
JB
D000368:Aged; D000369:Aged, 80 and over; D019644:Arthroplasty, Replacement, Hip / Q000379:methods*; D001843:Bone Cements; D002484:Cementation; D005260:Female; D006621:Hip Joint / Q000033:anatomy & histology / Q000601:surgery*; D006622:Hip Prosthesis; D006801:Humans; D008297:Male; D008875:Middle Aged; D010934:Planning Techniques; D011300:Preoperative Care; D017755:Prosthesis Fitting; D011857:Radiographic Image Interpretation, Computer-Assisted / Q000379:methods*; D015203:Reproducibility of Results
D001843:Bone Cements
Int Orthop. 2008 Jun;32(3):289-94
17404731
Comput Aided Surg. 1998;3(6):320-4
10379982
J Bone Joint Surg Br. 2006 May;88(5):581-5
16645101
J Bone Joint Surg Br. 1998 May;80(3):382-90
9619923
Arch Orthop Trauma Surg. 2008 Oct;128(10):1023-9
17994244
Med Eng Phys. 2003 Jun;25(5):371-7
12711234
Orthopedics. 2005 Aug;28(8 Suppl):s849-51
16119726
Acta Orthop Scand. 1992 Aug;63(4):407-10
1529690
Contemp Orthop. 1992 Jun;24(6):703-10
10149945
Orthopedics. 2007 Sep;30(9):764-5
17899929
Orthopade. 2000 Jul;29(7):636-40
10986708
Med Phys. 2005 Aug;32(8):2580-9
16193788
J Arthroplasty. 2005 Jan;20(1):51-8
15660060
Orthopedics. 1990 Jan;13(1):17-21
2300514
Acta Orthop Scand. 2004 Feb;75(1):40-4
15022804
Instr Course Lect. 2000;49:83-96
10829164
Instr Course Lect. 2000;49:3-11
10829157
Acta Chir Orthop Traumatol Cech. 2002;69(6):362-8
12587498
Acta Orthop. 2005 Feb;76(1):78-84
15788312
Skeletal Radiol. 2006 Jun;35(6):390-3
16572344
Clin Orthop Relat Res. 1992 Jan;(274):12-21
1728996
Langenbecks Arch Surg. 2004 Oct;389(5):400-4
14727119
Arch Orthop Trauma Surg. 2007 Jul;127(5):381-5
17522880
J Arthroplasty. 1992;7 Suppl:403-9
1431923
J Bone Joint Surg Am. 2004;86-A Suppl 2:118-22
15691116
J Arthroplasty. 1995 Aug;10(4):507-13
8523011
Orthop Clin North Am. 1999 Apr;30(2):191-207
10196421
Orthopedics. 2005 Sep;28(9 Suppl):s1037-40
16190031
Clin Orthop Relat Res. 1986 Jan;(202):302-6
3955963
J Bone Joint Surg Br. 2006 Nov;88(11):1508-12
17075099