Do small changes in rotation affect measurements of lower extremity limb alignment?

Journal of Orthopaedic Surgery and Research
Amir A JamaliCarol Parise

Abstract

The alignment of the lower extremity has important implications in the development of knee arthritis. The effect of incremental rotations of the limb on common parameters of alignment has not been studied. The purpose of the study was to (1) determine the standardized neutral position measurements of alignment and (2) determine the effect of rotation on commonly used measurements of alignment. Eighty-seven full length CT angiography studies (49 males and 38 females, average age 66 years old) were included. Three-dimensional models were created using a rendering software program and placed on a virtual plane. An image of the extremity was obtained. Thirty scans were randomly selected, and those models were rotated in 3° intervals around the longitudinal axis and additional images were obtained. In the neutral position, the mechanical lateral distal femoral articular angle (mLDFA) was 85.6 ± 2.3°, medial proximal tibial angle (MPTA) was 86.1 ± 2.8°, and mechanical tibiofemoral angle (mTFA) was -0.7 ± 3.1°. Females had a more valgus alignment with a mTFA of 0.5 ± 2.9° while males had a more varus alignment with a mTFA of -1.7 ± 2.9°. The anatomic tibiofemoral angle (aTFA) was 4.8 ± 2.6°, the anatomic lateral distal femoral angle (...Continue Reading

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Citations

Nov 11, 2019·Knee Surgery, Sports Traumatology, Arthroscopy : Official Journal of the ESSKA·Lukas JudLazaros Vlachopoulos
May 8, 2020·Archives of Orthopaedic and Trauma Surgery·Marc-Daniel AhrendHeiko Baumgartner
Jul 19, 2020·Knee Surgery, Sports Traumatology, Arthroscopy : Official Journal of the ESSKA·Young-Wan MoonDae-Hee Lee
Aug 21, 2020·EFORT Open Reviews·Sohail NisarHemant Pandit
Jul 12, 2018·Knee Surgery, Sports Traumatology, Arthroscopy : Official Journal of the ESSKA·Robert Karl ZahnHagen Hommel
Feb 27, 2021·Journal of Orthopaedic Surgery·Jade Pei Yuik HoMuhammad Sufian Hashim
Mar 7, 2021·Archives of Orthopaedic and Trauma Surgery·Marc-Daniel AhrendHeiko Baumgartner
Jan 29, 2021·Strategies in Trauma and Limb Reconstruction·Stephen D BigachRaymond W Liu
May 4, 2021·Arthroplasty Today·Stefano A BiniErik N Hansen
Jun 23, 2021·Der Orthopäde·Kerstin RadtkeSebastian Braun
Jul 17, 2021·Knee Surgery, Sports Traumatology, Arthroscopy : Official Journal of the ESSKA·Na-Kyoung LeeChong Bum Chang
Oct 2, 2021·Archives of Orthopaedic and Trauma Surgery·Marc-Daniel AhrendFelix Finger
Oct 15, 2021·Orthopaedics & Traumatology, Surgery & Research : OTSR·Florian BarbotteNicolas Pujol

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