Abstract—Developmental Dysplasia of the hip DDH is
considered as one of the most common Orthopedic Disorders,
referring to a range of conditions from mild to severe
dislocation of the hip joint. However, there are unclear gait
alterations in individuals with DDH such as the investigation of
the Ankle and Knee devices AFOs and their effect on the
kinematics and kinetics of the joints during walking and
running. This paper aimed to study and evaluate the
kinematics and kinetics of the ankle and knee joints during
walking in the sagittal plane for a patient age 26 with severe
dysplasia of the left hip who is experiencing using two different
types of ankle-foot Orthosis (Custom-made, and Leaf-AFO).
The data were collected using ten cameras and one force plate.
We used an inverse dynamic approach to calculate sagittal
joint angles, moments and power. The results pointed out that
the planter flexion angle reached the maximum during the time
between the Toes-off the ground phase and the initial swing
phase significantly by mean difference (21.1, 14 deg). Moreover,
the results indicated that the fabricated orthosis has decreased
both the right and left extensor moments significantly during
the load-bearing phase in comparison to Barefoot by mean
difference (0.29, and 0.43 Nm/kg) respectively for both limbs.
The paper concluded that the kinematics and kinetics of the
ankle joint improved by the Custom made-Orthosis more than
that of the Leaf AFO-Spring Orthoses. Finally, it concluded
that both AFOs did not change much the kinematics of the
knee joint; however, there were some improvements in the
moments and power generated.
Index Terms—Developmental dysplasia of the hip (DDH),
gait cycle, sagittal plane, ankle and knee joints, kinematics and
kinetics, motion capture analysis, AFOs.
Redha Alrikabi is with the Faculty of Engineering, University of
Southern Queensland, Australia (e-mail:
RedhaBurhanSalman.Alrikabi@usq.edu.au).
Albert Chong is with the School of Civil Engineering and Surveying,
University of Southern Queensland, Australia (e-mail: albertkonfook.
chong@usq.edu.au )
Ahmad Sharifian is with the School of Mechanical and Electrical
Engineering Department, University of Southern Queensland, Australia (email:
ahmad.Sharifian-Barforoush@usq.edu.au).
[PDF]
Cite: Redha Alrikabi, Albert Chong, and Ahmad Sharifian, "Studying the Effects of Using Two Types of Afos on the Ankle and Knee Joints Kinematics and Kinetics During Walking in the Sagittal Plane for A Patient with Severe DDH; Part 2," International Journal of Materials, Mechanics and Manufacturing vol. 8, no. 3, pp. 148-154, 2020.
Copyright © 2020 by the authors. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (
CC BY 4.0).