1
|
Ghanem I, Massaad A, Assi A, Rizkallah M, Bizdikian AJ, El Abiad R, Seringe R, Mosca V, Wicart P. Understanding the foot's functional anatomy in physiological and pathological conditions: the calcaneopedal unit concept. J Child Orthop 2019; 13:134-146. [PMID: 30996737 PMCID: PMC6442506 DOI: 10.1302/1863-2548.13.180022] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
BACKGROUND A thorough review of the available orthopaedic literature shows significant controversies, inconsistencies and sparse data regarding the terminology used to describe foot deformities. This lack of consensus on terminology creates confusion in professional discussions of foot anatomy, pathoanatomy and treatment of deformities. The controversies apply to joint movements as well as static relationships between the bones. DESCRIPTION The calcaneopedal unit (CPU) is a specific anatomical and physiological entity, represented by the entire foot excepted the talus. The calcaneus, midfoot and forefoot are solidly bound by three strong ligaments that create a unit that articulates with the talus. The movement of the CPU is complex, as it rotates under the talus, around the axis of Henke that coincides with the talo-calcaneal ligament of Farabeuf.This calcaneopedal unit is deformable. It is compared with a twisted plate, able to adapt to many physiological situations in standing position, in order to acheive a plantigrade position.Moreover, the calcaneopedal unit and the talo-tibiofibular complex are interdependent; rotation of the latter produces morphologic modifications inside the former and vice versa. PURPOSE This paper is a review article of this concept and of its physiopathological applications.
Collapse
Affiliation(s)
- I. Ghanem
- Faculty of Medicine, University of Saint-Joseph, Beirut, Lebanon,Orthopedic Surgery Department, Hôtel-Dieu de France Hospital, University of Saint-Joseph, Beirut, Lebanon, Correspondence should be sent to I. Ghanem, MD, Hôtel-Dieu de France Hospital, A. Naccache Avenue- Achrafieh, University of Saint-Joseph, Beirut, Lebanon. E-mail:
| | - A. Massaad
- Faculty of Medicine, University of Saint-Joseph, Beirut, Lebanon
| | - A. Assi
- Faculty of Medicine, University of Saint-Joseph, Beirut, Lebanon
| | - M. Rizkallah
- Orthopedic Surgery Department, Hôtel-Dieu de France Hospital, University of Saint-Joseph, Beirut, Lebanon
| | - A. J. Bizdikian
- Faculty of Medicine, University of Saint-Joseph, Beirut, Lebanon
| | - R. El Abiad
- Orthopedic Surgery Department, Hôtel-Dieu de France Hospital, University of Saint-Joseph, Beirut, Lebanon
| | - R. Seringe
- Orthopedic Surgery Department, Cochin University Hospital – University of Rene Descartes, Paris, France
| | - V. Mosca
- Department of Orthopedic Surgery, Seattle Children’s Hospital, Seattle, Washington, USA
| | - P. Wicart
- Orthopedic Surgery Department, Hôpital Necker-Enfants Malades, University of Paris Descartes, Paris, France
| |
Collapse
|
2
|
Bizdikian AJ, Assi A, Bakouny Z, Yared F, Saghbini E, Bakhos GE, Esber S, Khalil N, Otayek J, Ghanimeh J, Sauret C, Skalli W, Ghanem I. Validity and reliability of different techniques of neck-shaft angle measurement. Clin Radiol 2018; 73:984.e1-984.e9. [PMID: 30001859 DOI: 10.1016/j.crad.2018.06.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2017] [Accepted: 06/05/2018] [Indexed: 10/28/2022]
Abstract
AIM To determine a valid and reliable neck-shaft angle (NSA) measurement method while rotating the pelvises in increments of 5° in order to simulate patient malpositioning. MATERIALS AND METHODS CT images of 17 patients were used to produce digitally reconstructed radiographs in frontal and lateral views and three-dimensional (3D)-reconstructions of the femurs, considered to be the reference standard. Malpositioning was simulated by axially rotating the frontal radiographs from 0° to 20°. Three operators measured in two-dimensions the NSA using four different methods, three times each, at each axial rotation (AR) position. Method 1 (femoral neck axis drawn by joining the centre of the femoral head (CFH) to the median of the femoral neck base; femoral diaphysis axis drawn by joining the median of two lines passing through the medial and lateral edges of the femoral axis below the lesser trochanter) and method 2 (femoral axis taken as the median of a triangle passing through base of femoral neck and medial and lateral head-neck junction; femoral diaphysis as previous) were described for the first time; method 3 was based on a previous study; method 4 was a free-hand technique. Reliability, validity, and global uncertainty were assessed. RESULTS Method 1 showed the best reliability and validity. The global uncertainty also showed minimal values for method 1, ranging from 7.4° to 14.3° across AR positions. CONCLUSION Method 1, based on locating the CFH, was the most reliable and valid method and should be considered as a standardised two-dimensional NSA measurement method for clinical application.
Collapse
Affiliation(s)
- A J Bizdikian
- Laboratory of Biomechanics and Medical Imaging, Faculty of Medicine, University of Saint-Joseph, Beirut, Lebanon
| | - A Assi
- Laboratory of Biomechanics and Medical Imaging, Faculty of Medicine, University of Saint-Joseph, Beirut, Lebanon; Institut de Biomécanique Humaine Georges Charpak, Arts et Métiers ParisTech, Paris, France.
| | - Z Bakouny
- Laboratory of Biomechanics and Medical Imaging, Faculty of Medicine, University of Saint-Joseph, Beirut, Lebanon
| | - F Yared
- Laboratory of Biomechanics and Medical Imaging, Faculty of Medicine, University of Saint-Joseph, Beirut, Lebanon
| | - E Saghbini
- Laboratory of Biomechanics and Medical Imaging, Faculty of Medicine, University of Saint-Joseph, Beirut, Lebanon
| | - G E Bakhos
- Laboratory of Biomechanics and Medical Imaging, Faculty of Medicine, University of Saint-Joseph, Beirut, Lebanon
| | - S Esber
- Laboratory of Biomechanics and Medical Imaging, Faculty of Medicine, University of Saint-Joseph, Beirut, Lebanon
| | - N Khalil
- Laboratory of Biomechanics and Medical Imaging, Faculty of Medicine, University of Saint-Joseph, Beirut, Lebanon
| | - J Otayek
- Laboratory of Biomechanics and Medical Imaging, Faculty of Medicine, University of Saint-Joseph, Beirut, Lebanon
| | - J Ghanimeh
- Laboratory of Biomechanics and Medical Imaging, Faculty of Medicine, University of Saint-Joseph, Beirut, Lebanon
| | - C Sauret
- Institut de Biomécanique Humaine Georges Charpak, Arts et Métiers ParisTech, Paris, France
| | - W Skalli
- Institut de Biomécanique Humaine Georges Charpak, Arts et Métiers ParisTech, Paris, France
| | - I Ghanem
- Laboratory of Biomechanics and Medical Imaging, Faculty of Medicine, University of Saint-Joseph, Beirut, Lebanon; Hôtel-Dieu de France Hospital, University of Saint-Joseph, Beirut, Lebanon
| |
Collapse
|