Sebastien Parratte

Sebastien Parratte
Assistance Publique Hôpitaux de Marseille | APHM · Institut du Mouvement et de l'appareil Locomoteur

MD, PhD

About

326
Publications
32,117
Reads
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7,035
Citations
Additional affiliations
November 2007 - present
Aix-Marseille Université
Position
  • Professor (Assistant)
November 2007 - present
Assistance Publique Hôpitaux de Marseille
Position
  • Research Assistant
September 2007 - November 2017
Assistance Publique Hôpitaux de Marseille
Position
  • Professor

Publications

Publications (326)
Article
Background: A new morphometric fixed-bearing unicompartmental knee arthroplasty (UKA) system has been introduced to address the anatomical patient-specific challenges. It was our hypothesis that accurate restoration of the patient-specific anatomy would restore normal knee kinematics after UKA. Therefore, we aimed in this cadaveric study to analyz...
Article
Purpose: An anatomo-functional implant positioning (AFIP) technique in total knee arthroplasty (TKA) could restore physiological ligament balance (symmetric gap in extension, asymmetric gap in flexion). The purposes were to compare (1) ligament balancing in extension and flexion after TKA in the AFIP group, (2) TKA alignment, implant positioning a...
Article
Full-text available
Introduction To our knowledge, no papers have reported the results of robotic-assisted surgery for sequential bilateral Total Knee Arthroplasty (TKA). Indeed, sequential bilateral TKA present several benefits, as one single anesthesia, surgical episode, hospitalization, and rehabilitation. The purpose of our study was to evaluate peri-operative out...
Article
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Introduction The ROSA (Robotic Surgical Assistant) Knee system (Zimmer Biomet, Warsaw, IN) for total knee arthroplasty (TKA) can be considered as collaborative robotics, where the surgeon remains in charge of the procedure and collaborates with a smart robotic tool, to perform the surgery with a high accuracy and reproducibility. The aim was to des...
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Full-text available
PurposeMost opponents of assistive technologies in orthopedic surgery consider them as a marketing ruse or fashion. Our hypothesis was that many innovations in modern knee arthroplasty are not following the Scott Parabola. This parabola represents the visual curve of a procedure or therapy showing great promise at the beginning, becoming the standa...
Article
PurposeThe purpose of this study was to evaluate: (1) improvement of functional and quality of life scores, (2) adverse events, (3) short-term implants survivorship of a newly designed fixed-bearing partial knee replacement (PKR) with a morphometric tibial tray in a large and multicentric population at a minimum follow-up of 2 years.Methods From 20...
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Background Residual rotatory knee laxity at midterm follow-up after isolated anterior cruciate ligament reconstruction (ACLR) versus ACLR with lateral extra-articular tenodesis (LET) remains an issue. Purpose/Hypothesis To evaluate the outcomes of ACLR with or without additional LET at a minimum 2-year follow-up in patients with preoperative high-...
Article
Introduction The use of morphometric implants in Total Knee Arthroplasty (TKA) have shown better early clinical outcomes compared to conventional implants. The primary objective of this study was to evaluate the functional outcome and the implant survivorship of a morphometric TKA at a minimum of 5 years follow-up. Methods From May 2012 to June 20...
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Medial opening wedge high tibial osteotomy (OW-HTO) is an excellent surgical option for patients with varus knee osteoarthritis. This article presents a technique of performing a minimally invasive OW-HTO using a patient-specific cutting guide (PSCG). Preoperative 3-dimensional planning with computed tomography imaging is essential. The correction...
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Patellar lower-pole fractures occur in relatively young patients after eccentric contraction of the quadriceps or direct trauma. Early diagnosis and adequate treatment lead to excellent outcomes and prevent tendon retraction and scarring. The aim of surgical treatment is to restore articular congruence and reestablish the extensor mechanism of the...
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Results of open reduction and internal fixation for complex articular fractures around the knee are poor, particularly in elderly osteoporotic patients. Open reduction and internal fixation may lead to an extended hospital stay and non-weight-bearing period. This may lead to occurrence of complications related to decubitus such as thrombo-embolic e...
Article
Background The purpose of this study was to compare the functional outcomes and the implant survivorship at a minimum of 5 years follow-up of several reconstruction techniques with or without metaphyseal cone and stems of variable length. Methods a retrospective comparative matched analysis was performed from two prospectively collected databases....
Chapter
The goal of a medial opening-wedge HTO is to correct limb malalignment and to transfer weight-bearing from the degenerated medial compartment to the unaffected lateral compartment. Outcomes have been variable, mainly due to uncertainty around the extent of the correction planned and achieved. Current conventional techniques embrace a significant la...
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Anterior cruciate ligament reconstruction after graft failure may need associated bone correction to ensure stability of the knee. This article presents a technique of posteromedial opening-wedge osteotomy using a custom cutting guide to correct increased tibial slope and metaphyseal varus deformity after recurrent graft failure. An autograft quadr...
Article
Aims The aim of this study was to compare the ability of tantalum, 3D porous titanium, antibiotic-loaded bone cement, and smooth titanium alloy to inhibit staphylococci in an in vitro environment, based on the evaluation of the zone of inhibition (ZOI). The hypothesis was that there would be no significant difference in the inhibition of methicilli...
Article
Purpose: Given the goal of achieving optimal correction and alignment after knee arthroplasty or high tibial osteotomy, literature focusing on the inter-individual variability of the native knee, tibia and femur with regards to the coronal or sagittal alignment is lacking. The aim of this study was to analyse normal angular values in the healthy m...
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At advanced knee osteoarthritis (OA) stages subchondral trabecular bone (STB) is altered. Lower limb alignment plays a role in OA progression and modify the macroscopic loading of the medial and lateral condyles of the tibial plateau. How the properties of the STB relate to alignment and OA stage is not well defined. OA stage (KL scores 2–4) and al...
Article
Backgrounds Despite the use of a locking plate a 30% incidence of lateral hinge fracture after Open-Wedge High Tibial Ostetomy was described in the literature. A finite element model was used to analyze if the presence of a hinge-securing screw in the osteotomy area, using Patient Specific Cutting Guides with a locking plate, decreases the stresses...
Article
Purpose Prior studies have compared unicompartmental knee arthroplasty (UKA) with high tibial osteotomy (HTO) suggesting that both procedures had good functional outcomes. But none had established the superiority of one of the two procedures for patients with high expectation including return to impact sport. The aim of this study was to compare fu...
Article
Purpose A recent study reported that positioning a K-wire to intersect the cutting plane at the theoretical lateral hinge location increases the lateral hinge’s resistance to fracture during the opening of opening wedge high tibial osteotomy (OWHTO). The purpose of this study was to evaluate the clinical relevance of the use of this K-wire and its...
Article
Résumé Background L’usage du traitement fonctionnel des fractures engrenées du col fémoral est devenu rare et ses indications sont débattues, sans que des facteurs pronostiques ne soient clairement établis, notamment en raison d’effectifs souvent réduits. Aussi nous avons mené une large étude rétrospective afin : 1) d’évaluer le pourcentage de dép...
Article
Full-text available
Purpose: Patient-specific cutting guides (PSCGs) have been advocated to improve the accuracy of deformity correction in opening-wedge high-tibial osteotomies (HTO). It was hypothesized that PSCGs for HTO would have a short learning curve. Therefore, the goals of this study were to determine the surgeons learning curve for PSCGs used for opening-we...
Article
Background: Non-operative treatment for impacted femoral neck fractures is a now rarely used strategy whose indications are controversial. No outcome predictors have been convincingly identified, in part due to the small sizes of available studies. We conducted a large retrospective study with the following objectives: (1) to evaluate the percenta...
Article
Introduction Several recent studies have reported accurate and reliable use of patient-specific cutting guides (PSCG) for medial opening-wedge high tibial osteotomy (OW-HTO); however, a majority of these are small cases series or ex-vivo reports. The hypothesis of this study was that performing an OW-HTO with PSCG results in a reliable and accurate...
Article
Aims The aims of this study were to compare the mean duration of antibiotic release and the mean zone of inhibition between vancomycin-loaded porous tantalum cylinders and antibiotic-loaded bone cement at intervals, and to evaluate potential intrinsic antimicrobial properties of tantalum in an in vitro medium environment against methicillin-sensiti...
Article
Background: During medial unicompartmental knee arthroplasty (UKA), tibial tray implantation requires compromise between bone coverage and rotational position. It was hypothesized that morphometric tibial tray (MTT) would improve implant positioning and subsequently clinical outcomes as compared to symmetric tibial tray (STT). Methods: A total o...
Article
Background: Although the utility of robotic surgery has already been proven in cadaveric studies, it is our hypothesis that this newly designed robotically assisted system will achieve a high level of accuracy for bone resection. Therefore, we aimed to analyze in a cadaveric study the accuracy to achieve targeted angles and resection thickness. M...
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Background Three main meniscal preservation methods have been used over the past decade: cryopreservation, freezing, and freezing with gamma irradiation. Hypothesis All 3 preservation methods will result in similar biomechanical properties as defined by tensile and compression testing. Study Design Controlled laboratory study. Methods A total of...
Article
Full-text available
Purpose It was hypothesized in this in-vitro study that positioning a K-wire intersecting the cutting plane at the theoretical lateral hinge location would limit the cut depth and help preserve the lateral hinge during the opening of the osteotomy. Objectives were (1) to compare the mechanical resistance of the hinge and the protective effect of le...
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Background: Accelerometer-based navigation is a handheld navigation tool that was introduced to offer a simpler technique compared with more-cumbersome computer-assisted surgery (CAS). Considering the increasing number of adopters, it seems important to evaluate the potential clinical benefits of this technology compared with conventional TKA. Qu...
Chapter
Unicompartmental arthroplasty (UKA) is a highly effective treatment for isolated compartmental arthritis in the knee, especially among high volume surgeons. Implant loosening and technical problems related to bone resection and implant positioning may lead to higher rates of failure compared to total knee arthroplasty (TKA), particularly for low vo...
Article
Purpose The distal femoral varization osteotomy (DFVO) by a lateral opening wedge osteotomy is an established intervention for patients suffering from lateral femoro-tibial osteoarthritis on a genu valgum deformity. In order to improve the accuracy of this correction, the use of a customized cutting guide (PSI) has been proposed as an alternative t...
Article
Background Numerous series have documented short and mid-term successes with cemented, metal-backed modern unicompartmental knee arthroplasty (UKA) for avascular osteonecrosis of the knee (AVN). However, data are lacking regarding long-term implant fixation and patient function. The aim of this study is therefore to evaluate the long-term clinical...
Article
Aim:: The purpose of this study is to report the 20-year follow-up of a continuous series of 232 total hip arthroplasties (THAs) performed in patients aged less than 50 at the index surgery. Patients and methods:: This is a retrospective monocentric study which reports the clinical, radiographical and survival results of 232 THAs performed with...
Article
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Revisions TKAs are being completed with uncemented constructs more frequently. We hypothesized that tantalum cones could be an efficient carrier of antibiotics in uncemented procedures. We aimed to compare the release of vancomycin between 1) tantalum and smooth stainless cylinders, 2) different concentrations of vancomycin and 3) different duratio...
Article
Full-text available
Background: Three main meniscus preservation methods have been advocated: freezing (-80°C), freezing with gamma irradiation (-80°C + 25 kGy), and cryopreservation (-140°C). Hypothesis: All preservation methods will result in structural and architectural properties similar to those of fresh meniscus, defined as the gold standard. Study design:...
Article
Increasing use of patient-specific surgical procedures in orthopaedics means that patient-specific anatomical coordinate systems (ACSs) need to be determined. For knee bones, automatic algorithms constructing ACSs exist and are assumed to be more reliable than manual methods, although both approaches are based on non-unique numerical reconstruction...
Article
Full-text available
Background: The aim of this in vitro study was to assess the accuracy of three-dimensional patient-specific cutting guides for open wedge high tibial osteotomy (OWHTO) to provide the planned correction in both frontal and sagittal planes. Methods: Ten cadaveric tibias underwent OWHTO performed using a patient-specific cutting guide based on 3D p...
Article
Las indicaciones de la artroscopia de cadera han aumentado en la última década con la popularización del conflicto femoroacetabular y en la actualidad parece difícil para un cirujano de cadera no aprender a usar esta herramienta. Como en cualquier técnica nueva, el cirujano debe conocer las bases anatómicas y el material necesario antes de iniciar...
Article
Résumé Introduction L’incidence des fractures fémorales péri-prothétiques (FPP) de hanche est en augmentation constante avec une morbi-mortalité élevée. La prise en charge chirurgicale est guidée par la classification de Vancouver mais l’influence du type de traitement sur la morbi-mortalité reste mal décrite. L’avantage théorique de la révision p...
Article
Résumé Introduction Pour optimiser le positionnement des cupules prothétiques, les relations entre l’équilibre sagittal du rachis et l’orientation acétabulaire sont fréquemment investiguées. Cependant, il n’a pas encore été démontré de corrélation entre l’incidence pelvienne (IP) et l’orientation acétabulaire anatomique. Aussi, nous avons mené une...
Article
Full-text available
Introduction: Injectable cements have been developed to improve fixation's stability and thus obtain early return to adequate joint function. We aimed to compare post-operative radiographic and clinical outcomes of patients suffering from a complex tibial plateau fracture (TPF) fixed with calcium-phosphate bone substitutes (CPBS) augmentation to a...
Article
Background Tibial implant’s positioning in total knee arthroplasty (TKA) requires a compromise between implant’s rotation and bone coverage. We hypothesized that morphometric tibial trays (MTT) would improve implants positioning and clinical outcomes as compared to symmetrical tibial tray (STT). Methods Thirty-three patients were included prospect...
Article
Résumé Introduction Le positionnement cinématique (KA) des implants actuels de prothèse totale de genou (PTG) génère une trochlée prothétique aux paramètres morphologiques différents de ceux qui seraient obtenus après un positionnement mécanique (MA). L’objectif de notre étude était de tester les hypothèses suivantes : (1) l’implantation mécanique...
Article
Résumé Introduction Les interventions préalables aux prothèses totales de genou (PTG) compliquent la technique opératoire et peuvent modifier le devenir de l’arthroplastie. Notamment les taux de survie des PTG après un antécédent traumatique ou chirurgical ne sont pas connus avec précision sur de larges séries. Cette étude rétrospective portant su...
Article
Full-text available
We previously compared the 15-year survivorship of total knee arthroplasty (TKA) implants that were mechanically aligned (0° ± 3° relative to the mechanical axis) compared with those that were outside that range and considered outliers. The original publication included 398 TKAs (292 in the aligned group and 106 in the outlier group) performed from...
Article
Introduction: The incidence of periprosthetic femoral fracture is constantly increasing, with high associated morbidity and mortality. Surgical treatment is guided by the Vancouver classification, but the influence of type of treatment on morbidity and mortality has been little analyzed. The theoretic advantage of implant revision over internal fi...
Article
Introduction: Recent reports described possible mechanical factors in the development and aggravation of osteonecrosis of the femoral head (OFH), but these have yet to be confirmed on dedicated mechanical study. We therefore developed a 3D finite element model based on in-vivo data from patients with incipient OFH, with a view to determining wheth...
Article
Background Options for total hip arthroplasty (THA) in high dislocated hips include subtrochanteric osteotomy, high hip center positioning and two-stage surgery with progressive lowering using an external fixator prior to THA. We described the long term results of one-stage THA performed without subtrochanteric osteotomy (STO), using a cementless c...
Article
Introduction: Due to complex anatomical considerations, results of cementless-stem total hip arthroplasty (THA) in hip fusion remain controversial compared with conventional THA. We therefore aimed to analyse 3D anatomy of the fused hip based on pre-operative computed tomography (CT) scans, functional outcomes based on the Harris Hip Score (HHS) a...
Article
Full-text available
Background Previously published studies reported benefits of computer-assisted surgery (CAS) in terms of radiographic implant position in TKA, but whether these improvements result in clinically important survival differences or functional differences that a patient might perceive at a minimum 10-year followup remains largely unknown. Questions/pu...
Article
Introduction Kinematic (KA) and mechanical (MA) alignment techniques are two different philosophies of implant positioning that use the same TKA implants. This might generate differences in the resulting prosthetic trochlea parameters between the two techniques of alignment. Our study aim was to test the following hypotheses: 1) Mechanically or ki...
Chapter
The orthopedic surgeon should be aware of mechanical disorders that can affect the hip and lead to its degeneration, as most of those can be addressed surgically with success. The principal well-known cause for decades leading to hip osteoarthritis is developmental dysplasia of the hip. Eligibility for conservative surgery of DDH includes radiologi...
Article
Introduction Des travaux cliniques récents montre que le taux de patients présentant un ressaut rotatoire persistant et/ou une rerupture est significativement réduit après reconstruction combinée du ligament croisé antérieur (LCA) plus plastie latérale extra articulaire (PAL). Des études plus fondamentales ont démontré que la réalisation d’une PAL...
Article
Introduction Les systèmes de fixation en PolyEtherEtherKetone permettent d’envisager une fixation en suspension rigide, ne nécessitant pas d’ablation en cas de reprise, tout en évitant les phénomènes de résorption osseuse et d’ostéolyse. Notre objectif était de comparer les modifications osseuses au contact de deux modes de fixations tibiales des r...
Article
Introduction La méthode de préparation/stérilisation des allogreffes méniscales la plus répandue à l’heure actuelle est l’irradiation gamma, certains auteurs ont soulignés le risque d’une irradation à 25kGy sur la dégradation l’ultrastructure et les propriétés mécaniques des tissus méniscaux. Deux alternatives principales existent la congélation si...
Article
Relatively poor results have been reported with open reduction and internal fixation of complex fractures around the knee in elderly osteoporotic patients, and primary total knee arthroplasty (TKA) has been proposed as an alternative solution. While limiting the number of procedures, it meets two prerequisites: 1) to save the patient's life, thanks...
Article
Background: Previous surgical procedures raise technical challenges in performing total knee arthroplasty (TKA) and may affect TKA outcomes. Survival rates of TKA done after trauma or surgery to the knee have not been accurately determined in large populations. The objectives of this retrospective study in 263 patients with TKA after knee trauma o...