Difference between revisions of "X-ray of knee prosthesis"
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*FFC: frontal femoral component angle. It is typically regarded as optimal when being 2–7° in valgus.<ref name="GromovKorchi2014">{{cite journal|last1=Gromov|first1=Kirill|last2=Korchi|first2=Mounim|last3=Thomsen|first3=Morten G|last4=Husted|first4=Henrik|last5=Troelsen|first5=Anders|title=What is the optimal alignment of the tibial and femoral components in knee arthroplasty?|journal=Acta Orthopaedica|volume=85|issue=5|year=2014|pages=480–487|issn=1745-3674|doi=10.3109/17453674.2014.940573}}</ref> | *FFC: frontal femoral component angle. It is typically regarded as optimal when being 2–7° in valgus.<ref name="GromovKorchi2014">{{cite journal|last1=Gromov|first1=Kirill|last2=Korchi|first2=Mounim|last3=Thomsen|first3=Morten G|last4=Husted|first4=Henrik|last5=Troelsen|first5=Anders|title=What is the optimal alignment of the tibial and femoral components in knee arthroplasty?|journal=Acta Orthopaedica|volume=85|issue=5|year=2014|pages=480–487|issn=1745-3674|doi=10.3109/17453674.2014.940573}}</ref> | ||
*FTC: frontal tibial component angle, which is regarded as optimal when being at a [[right angle]]. A varus position of more than 3° has generally been found to increase the failure rate of the prosthesis.<ref name="GromovKorchi2014"/> | *FTC: frontal tibial component angle, which is regarded as optimal when being at a [[right angle]]. A varus position of more than 3° has generally been found to increase the failure rate of the prosthesis.<ref name="GromovKorchi2014"/> | ||
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*LTC: lateral (or sagittal) tibial component angle, which is ideally positioned so that the tibia is 0–7° flexed compared to at a right angle with the tibial plate.<ref name="GromovKorchi2014"/> | *LTC: lateral (or sagittal) tibial component angle, which is ideally positioned so that the tibia is 0–7° flexed compared to at a right angle with the tibial plate.<ref name="GromovKorchi2014"/> | ||
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| + | LFC is the lateral (or sagittal) femoral component angle,<ref name=Inui2013/> but its use is not necessary as long as there are no established clinically relevant reference ranges for it. | ||
==References== | ==References== | ||
{{reflist}} | {{reflist}} | ||
Revision as of 14:30, 31 August 2018
Author:
Mikael Häggström [notes 1]
Post-operative evaluation
Knee replacement is routinely evaluated by projectional radiography ("X-ray"), including the following measures:
- HKA: Hip-knee-ankle angle, which is ideally between 3° varum to 3° valgum from a right angle.[1]
- FFC: frontal femoral component angle. It is typically regarded as optimal when being 2–7° in valgus.[2]
- FTC: frontal tibial component angle, which is regarded as optimal when being at a right angle. A varus position of more than 3° has generally been found to increase the failure rate of the prosthesis.[2]
- LTC: lateral (or sagittal) tibial component angle, which is ideally positioned so that the tibia is 0–7° flexed compared to at a right angle with the tibial plate.[2]
LFC is the lateral (or sagittal) femoral component angle,[1] but its use is not necessary as long as there are no established clinically relevant reference ranges for it.
References
- ↑ 1.0 1.1 1.2 Inui, Hiroshi; Taketomi, Shuji; Nakamura, Kensuke; Takei, Seira; Takeda, Hideki; Tanaka, Sakae; Nakagawa, Takumi (2013). "Influence of navigation system updates on total knee arthroplasty ". Sports Medicine, Arthroscopy, Rehabilitation, Therapy & Technology 5 (1). doi:. ISSN 1758-2555. (CC-BY-2.0)
- ↑ 2.0 2.1 2.2 Gromov, Kirill; Korchi, Mounim; Thomsen, Morten G; Husted, Henrik; Troelsen, Anders (2014). "What is the optimal alignment of the tibial and femoral components in knee arthroplasty? ". Acta Orthopaedica 85 (5): 480–487. doi:. ISSN 1745-3674.
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