Senior orthopaedic surgeon ( surgical practice and teaching):
Department of orthopedic and trauma surgery, Assistance Publique des Hôpitaux de Paris
La Pitié-Salpêtrière teaching hospital.
47-83, boulevard de l’Hôpital - 75013 Paris - France
Professeur des Universités (teaching and research):
Department of Anatomy, Medecine Sorbonne Universite Paris
105, boulevard de l'Hôpital - 75013 Paris - France
Biomechanics Lab, Arts et Métiers Paritech.
151, boulevard de l’Hôpital - 75013 Paris - France
The surgical practice and the research orientation are focused on two main interests:
Spine surgery, especially degenerative spine surgery (correction of deformity, anterior fusion, lumbar and cervical disc arthroplasty).
Surgery of the lower limb arthroplasties (hip and knee).
In the field of joint replacement surgery, Pr. Lazennec has a particular expertise in the field of minimally invasive anterior approach. He has developed a personal surgical technique for miniinvasive approach for THP in lateral decubitus, suitable for primary surgery as for revision. He has a significant experience with ceramic on ceramic hip joints and revisions of metal – metal THP using ceramic wear surfaces.
Two main directions have been followed for research:
Exploration and analysis of prosthetic instability phenomena and their consequences in terms of wear and clinical dysfunction (with a special interest for dual mobility total hip replacement, including ceramic tripolar implants).
Tribology of metal-metal and alumina-alumina bearings with a specific interest for the analysis of alterations in metal-metal wear couples. Pr Lazennec has a particular expertise in the area of composite alumina-alumina wear surfaces he has been using since 2005.
In the field of spinal surgery, the current practice of Pr. Lazennec is oriented to severe deformities (scoliosis, sagittal deformations, camptocormia). Pr. Lazennec also has a particular expertise in the field of anterior minimally invasive surgery of the lumbar spine for disc replacement or fusion.
Two lines of research have been followed:
Analysis,description and definition of strategies for the correction of sagittal imbalance.
Pr Lazennec has a particular expertise in the field of postural disturbances including “hip – spine syndromes” and “hip-knee- spine syndromes”. These problems are more common in the elderly ; and require a combined experience of spine surgery and lower limbs joints replacements.
The development of innovative concepts for lumbar and cervical disc replacement.
Pr Lazennec is one of the leading designers of composite disc prosthesis for lumbar and cervical locations .The materials and the mechanical properties differentiate this viscoelastic disc replacement from the other available prostheses. After a long term research program, the clinical experience is now multicentric in different countries.
In addition, different research activities have been devoted to technical aspects, biomaterials research and clinical studies for current spinal surgery.
Additionally, Pr. Lazennec was involved in a clinical research program on the EOS® low dose full body imaging system. He was especially interested in applications for spine surgery and lower limbs arthroplasties. This technology opens new opportunities for precise exploration of sagittal imbalance (in particular in spinal deformities and "hip-spine" syndromes) as it allows a new approach to postural abnormalities involving both the spine and the subpelvic area.
Pr. Lazennec has focused on the evaluation of patient’s functional positions (standing, sitting or squatting). As metal implants don’t induce significant artifacts, the precise orientation of the implants can be evaluated; these studies provide valuable information to understand arthoplasties kinematics and wear phenomena.
FACULTY AND HOSPITAL STAFF AFFILIATIONS:
