Orthopaedic - Orthopaedic Surgeons for Hip arthroplasty in Attica

Mr. Nikolaos Kalos is an Orthopedic Surgeon and Deputy Director of the 4th Orthopedic Clinic at Metropolitan General in Cholargos. He maintains a private practice in Neo Psychiko.

He is a graduate of the Medical School of the University of Ioannina and completed his specialization at the University Orthopedic Clinic of Ioannina.

He specialized at the Osteoarthritis and Knee Deformities Treatment Center, LKH Stolzalpe - Murau in Austria. In his private practice, he provides a wide range of services, tailored to the individual needs of each patient.

Dr. Nikolaos Tzinieris, MD, MSc, FMH, is an Orthopedic Surgeon who maintains private practices at Mavili Square and in Peristeri. He is the Director of the 2nd ORTHOPEDIC CLINIC - Upper Limb, Hand, and Microsurgery Clinic at the "Errikos Dynan" Hospital Center. He graduated from the Medical School of the National and Kapodistrian University of Athens. During his specialty training, he was also trained at the University Clinic of Hôpital Orthopédique in Lausanne and subsequently was appointed as Assistant Consultant B’ at the Upper Limb-Hand and Microsurgery Clinic of KAT Hospital. He completed his subspecialty training in Upper Limb and Spine Surgery at the University Hospital of Lausanne and served as Consultant at the University Hand and Microsurgery Surgical Clinic Longeraie in Lausanne and at the CH8 Clinic in Geneva, while simultaneously working at major private medical centers in French-speaking Switzerland. Upon returning to Greece, he collaborated with his mentor, N. Gerostathopoulos, and together they established the 2nd Orthopedic Clinic of Errikos Dynan Hospital, assembling an exceptionally esteemed team of experienced and accomplished associates. To this day, he continues to collaborate with surgical centers in Switzerland. Throughout his career, he has delivered numerous lectures and presentations at Greek and international conferences and serves as an instructor in postgraduate training seminars. He also holds a Master's degree, has an extensive number of publications, and is a member of the Swiss Society of Orthopedic Surgeons, the Swiss Medical Association, the American Association for Hand Surgery (AAHS), and the American Spine Surgery Society.

Dimitrios Xrysovitsianos is an Orthopedic Surgeon who maintains a private practice in Ilion. He holds a degree from the Medical School of the National and Kapodistrian University of Athens and specialized in Orthopedics - Orthopedic Surgery at the Attikon General Hospital of Athens KAT. He is specialized in microsurgery, upper limb and hand surgery, sports injuries, pediatric and adult trauma, osteoporosis, arthritis treatment, hip and knee arthroplasties, and foot disorders. He serves as the Chief of the Orthopedic Clinic of the Upper Limb Surgery - Traumatology Department at Euroclinic Athens, as well as Consultant at the First Pediatric Orthopedic Clinic of the Marousi Medical Center. Additionally, he is a member of the SOS Doctors. Previously, he has served as Consultant in Upper Limb Surgery at Metropolitan Hospital. He has significant professional experience in private hospitals in Athens, having worked in these institutions since 2001. Finally, the doctor has participated in numerous lectures and orthopedic conferences and has authored many medical papers, aiming for continuous engagement with advancements in his field.

Ο Κεχαγιάς Βασίλειος MD, MSc, PhD είναι Ορθοπαιδικός Χειρουργός και διατηρεί ιδιωτικό ιατρείο στο Καματερό. Είναι Διδάκτωρ της Ιατρικής Σχολής του Εθνικού και Καποδιστριακού Πανεπιστημίου Αθηνών με θέμα "Προοπτική Μελέτη των Μεταβολών Σπονδυλικής Στήλης και Πυέλου μετά από Ολική Αρθροπλαστική Ισχίου και Γόνατος". Παράλληλα, είναι κάτοχος Μεταπτυχιακού Τίτλου Σπουδών στα "Μεταβολικά Νοσήματα Των Οστών" από την Ιατρική Σχολή του Εθνικού και Καποδιστριακού Πανεπιστημίου Αθηνών, ενώ αποφοίτησε από την ίδια Σχολή το 2006 και συνέχισε την ακαδημαϊκή του πορεία με μεταπτυχιακές και διδακτορικές σπουδές, τις οποίες ολοκλήρωσε με βαθμό "Άριστα". Διαθέτει πολυετή εμπειρία στη διάγνωση και χειρουργική αντιμετώπιση παθήσεων και κακώσεων του μυοσκελετικού συστήματος, με ιδιαίτερο ενδιαφέρον στην αρθροπλαστική ισχίου και γόνατος, την αρθροσκόπηση ώμου και γόνατος, τη χειρουργική καταγμάτων, την τραυματολογία και τις αθλητικές κακώσεις. Παράλληλα, ασχολείται με τη χειρουργική άκρας χειρός, τις παθήσεις της σπονδυλικής στήλης και του άκρου ποδός, καθώς και με τη διάγνωση και θεραπεία της οστεοπόρωσης.

Κατέχει τον βαθμό του Διευθυντή Ε.Σ.Υ. και συνεργάζεται με το Ιατρικό Περιστερίου του Ομίλου Ιατρικού Αθηνών, ενώ έχει αποκτήσει σημαντική κλινική εμπειρία μέσα από τη δραστηριότητά του σε νοσοκομειακές μονάδες, όπως το Γενικό Νοσοκομείο Πειραιά "Τζάνειο", το Γενικό Νοσοκομείο Βόλου και το Γενικό Νοσοκομείο Λήμνου.

Είναι ενεργό μέλος του Ιατρικού Συλλόγου Αθηνών, της Ελληνικής Εταιρείας Χειρουργικής Ορθοπαιδικής και Τραυματολογίας (Ε.Ε.Χ.Ο.Τ.) και του Ελληνικού Ιδρύματος Οστεοπόρωσης.

Στόχος του είναι η παροχή εξατομικευμένης, σύγχρονης και υψηλού επιπέδου ιατρικής φροντίδας, με έμφαση στην ορθή διάγνωση, τη λεπτομερή ενημέρωση του ασθενούς και την εφαρμογή των πλέον σύγχρονων θεραπευτικών και χειρουργικών μεθόδων.

Emmanouil Skotidis is an Orthopedic Surgeon specializing in the diagnosis and treatment of musculoskeletal disorders, with an emphasis on degenerative joint diseases, hip arthroplasty, and knee arthroplasty. He maintains a private practice in Porto Rafti. He systematically works with total hip arthroplasty using the anterior approach, a modern, minimally invasive technique that allows for faster mobilization, reduced postoperative pain, and quicker return to daily activities. Additionally, he performs total knee arthroplasty to address severe osteoarthritis and chronic knee pain, utilizing personalized surgical planning. His expertise also includes traumatology of the upper and lower extremities as well as the management of sports injuries, both through conservative treatment and surgical reconstruction when indicated. He conducts comprehensive orthopedic examinations of the upper extremity aimed at accurate diagnosis and rational treatment. Furthermore, he provides osteoporosis screening and management, focusing on fracture prevention and the maintenance of functionality. His approach is based on contemporary medical knowledge, evidence-based decision-making, and thorough patient education.

Andreopoulos Asimakis is an Orthopedic Surgeon - Sports Medicine Specialist who has maintained his medical practice since 2008 in Ilion, Attica. He has been a Consultant at the 1st Orthopedic Clinic of Metropolitan General since 2008 and a collaborator at the Athens Medical Center in the Peristeri Clinic. He specializes in hip and knee arthroplasties, shoulder and knee arthroscopies, and traumatology. Throughout his career, he has worked in numerous hospitals and clinics, such as the General Hospital of Attica KAT and the General Hospital of Athens "Evangelismos," treating conditions including sports injuries, sciatica, fractures, low back pain, osteoarthritis, osteosynthesis, scoliosis, and spinal stenosis. Finally, he is a member of the Athens Medical Association, the Hellenic Society of Orthopedic Surgery & Traumatology, and the Hellenic Osteoporosis Foundation.

Kakavas Pindaros is an Orthopedic Surgeon at the Athens Medical Center, Chief Physician of the AEK F.C. Football Academy, and maintains a private practice in Neo Psychiko. He holds a Diploma in Sports Injuries from the International Olympic Committee based in Lausanne. He graduated from the Medical School of Aristotle University of Thessaloniki and specialized in Orthopedics at the General Hospital "Evangelismos." Concurrently, he specialized in Upper Limb Microsurgery and Pediatric Orthopedics at the General Hospital of Attica "KAT." He has served as a consultant at the 2nd Sports Injuries Clinic of Euroclinic Athens, Team Doctor for AEK FC (A' Team), Football Academy Doctor for Panathinaikos F.C., and as a member of the medical staff for AEK BC and Panellinios BC. Throughout his career, he has accumulated surgical experience in sports injuries, arthroscopic surgery, total knee and hip arthroplasties, and orthopedic trauma.

Pathiakis Ioannis Md, MSc, PhD is an Orthopedic Surgeon who maintains a private practice in Peristeri. He holds a medical degree from the Medical School of the National and Kapodistrian University of Athens and has obtained two postgraduate degrees in "Minimally Invasive Surgery, Robotic Surgery & Tele-surgery Medicine" and "Surgical Anatomy" from the Medical School of the same university. Additionally, he holds a Doctorate from the National and Kapodistrian University of Athens in the Department of Anatomy. He is specialized in Robotic Knee and Hip Surgery and in Microsurgical Bloodless Carpal Tunnel Release and holds a diploma in Medical Acupuncture from the Scientific Association of Medical Acupuncturists of Greece. He has completed training at numerous hospitals, while his specialty was completed in General Surgery at the General Hospital of Ierapetra. Furthermore, during his career, he has taught courses on First Aid, Traumatology, and musculoskeletal injuries at the IEK of Siteia and at the Volunteer Corps of Samaritans and Rescuers of Siteia, respectively. Finally, as part of his continuous education and updating in microsurgery and medical acupuncture, the physician regularly attends medical conferences, earning personal honorary distinctions.

Beyond Medicine, he holds a degree in Social Theology from the Theological School of Athens.

Masount Mamoun is an Orthopedic Surgeon with private practices in Ambelokipi (Gkyzi area) and Nafplio (Head of the Orthopedic Department at IASIS Polyclinic - Argolida).

He is a graduate of the Medical School of Aristotle University of Thessaloniki and holds a postgraduate diploma in metabolic bone diseases from the National and Kapodistrian University of Athens.

He has obtained a specialty title in Orthopedic Surgery and Traumatology from the 3rd University Orthopedic Clinic of the General Hospital of Attica KAT. He is specialized in arthroplasty, arthroscopy, traumatology, sports injuries, and surgery of major joints, as well as in osteoporosis, osteoarthritis, and fracture healing.

In his private clinic, he manages conditions across the entire spectrum of orthopedics, with a special interest and experience in pediatric orthopedics.

Additionally, he serves as a Scientific Collaborator and surgeon at Metropolitan Hospital, Medical Center Athens Group, and Hospitality Clinic Athens.

Finally, through his participation in numerous seminars, workshops, and conferences, he continually updates himself on advancements in his field to provide specialized services tailored to his patients' individual needs. He is also a member of the Hellenic Society of Orthopedic Surgery and Traumatology and the Hellenic Osteoporosis Foundation.

Dr. Nikolopoulos Ioannis, MD, MSc, is an Orthopedic Surgeon, graduate of the Medical School of the University of Ioannina, with a Master's degree in Metabolic Bone Diseases. He is a Scientific Associate - Orthopedic Surgeon at Metropolitan Hospital and maintains private practices in Aspropyrgos and at the Medica Polyclinic in Agios Stefanos. He provides high-level services for the treatment and rehabilitation of a wide range of orthopedic and musculoskeletal conditions in adults and children, such as chondropathy, osteoarthritis, scoliosis, kyphosis, fractures, sports injuries, and upper limb neuropathy. Additionally, he offers consulting services for osteoporosis screening. He specializes in Minimally Invasive Surgery for performing surgical procedures such as total hip and knee arthroplasty, and continues to enhance his surgical expertise abroad. Moreover, he has numerous publications in reputable international and Greek scientific journals and has participated as a speaker at domestic and international conferences.

Vasilakis Aleksandros is an Orthopedic Surgeon with a private practice in Cholargos. Simultaneously, he serves as a Consultant in the Orthopedic Clinic at Metropolitan Hospital in N. Faliro. He graduated from the Medical School of Democritus University of Thrace and holds a Master’s degree (MSc) in "Metabolic Bone Diseases - Osteoporosis" from the Medical School of the National and Kapodistrian University of Athens. From 2019 to 2022, he held the position of Consultant Orthopedic Surgeon in the Orthopedic Clinic at Asklipieio Voulas General Hospital, after which he has been providing his services in the private sector. He manages the treatment of conditions across the entire spectrum of Orthopedics, with particular interest in hip and knee arthroplasty, reconstructive surgery of foot disorders, and percutaneous minimally invasive reconstructive surgery of hallux valgus (bunion). He is also specialized in Arthroscopic Surgery of sports injuries and has further specialized in Hand Surgery - Microsurgery at KAT General Hospital and Asklipieio Voulas General Hospital. Dr. Vasilakis has participated in numerous national and international conferences, educational seminars, and courses on newer techniques, and has a scientific record with publications in international journals. He is a member of the Hellenic Society of Orthopedic Surgery and Traumatology, the Hellenic Arthroscopy Society, the Athens Medical Association, and the General Medical Council of the United Kingdom.

Pentazos Panagiotis - Nektarios is an Orthopedic Surgeon who maintains a private practice in Kolonaki. He graduated from the Medical School of the University of Timișoara in Romania and specialized in Pediatric Orthopedics at the General Children’s Hospital "Panagiotis & Aglaia Kyriakou" and in Vascular Surgery at the General Hospital of Athens "G. Gennimatas." Additionally, he specialized in Plastic Surgery at the Attica General Hospital KAT, Orthopedics at the General Hospital "Asklipieio" Voula, and General Surgery at the General Hospital of Pyrgos "Andreas Papandreou." Since 2018, Dr. Pentazos has been a Scientific Collaborator at the Osteoporosis Clinic of the General Hospital "Asklipieio" Voula. Finally, he is a member of the Athens Medical Association, the Hellenic Society of Orthopedic Surgery and Traumatology, and the Hellenic Osteoporosis Foundation.

Nikolopoulos Aleksandros MD is an Orthopedic Surgeon - Traumatologist - Sports Medicine Specialist with a private practice in Daphne. He holds a degree from the Faculty of Medicine at the University of Thessaly. He specialized at the General Surgery Clinic of the General Hospital of Karditsa and subsequently moved to Germany, where he continued his specialization in Orthopedics and Traumatology at one of the largest orthopedic clinics in the country, St. Anna Hospital, Herne. For two football seasons, he served as the Sports Medicine Physician for the youth football academies of Schalke 04 e.V., accompanying the teams to home and away matches, gaining significant experience in the management of sports injuries. He worked at the distinguished University Hospital of Bochum, St Josef Hospital - Universitätsklinikum der Ruhr Universität Bochum, where he obtained the Medical Specialty title in Orthopedics and Traumatology and continued his career there as a Consultant. Throughout his career, he has participated in numerous international scientific conferences and seminars, including key topics such as: ultrasonographic neonatal diagnostics according to Graf for early detection of hip dysplasia, specialized traumatology under the auspices of AO Trauma, endoscopic spinal surgery, emergency pre-hospital medicine (Notarzt), pediatric orthopedics, arthroscopic knee and shoulder surgery, microsurgery and arthroscopic surgery of the hand, reconstructive knee and hip surgery, among others. Overall, he has acquired substantial experience across the full spectrum of orthopedics and traumatology as well as significant surgical expertise, performing numerous complex surgical procedures in both adults and children. Finally, the physician is a member of the International Traumatology Society AO Trauma (Arbeitsgemeinschaft für Osteosynthesefragen) and the Hellenic Osteoporosis Foundation.

Ο Νικόλαος Σαλαμαλίκης είναι Ορθοπεδικός Χειρουργός Σπονδυλικής Στήλης και σκοπεύει στην εξατομικευμένη αντιμετώπιση παθήσεων και παραμορφώσεων της σπονδυλικής στήλης με ατραυματικές τεχνικές, κατέχοντας ήδη μεγάλη σειρά αποσυμπιέσεων σπονδυλικής στήλης με ενδοσκοπική τεχνική. Το 2024 ολοκλήρωσε με επιτυχία, Χειρουργικό Fellowship, με αντικείμενο τη Χειρουργική Σπονδυλικής Στήλης ελάχιστης επεμβατικότητας (Minimal Invasive Spine Surgery), σε αναγνωρισμένη Κλινική Σπονδυλικής Στήλης, από το παγκόσμιο εκπαιδευτικό δίκτυο Ορθοπεδικής (ΑΟ), στο Okayama Rosai Hospital της Ιαπωνίας, υπό τον Καθηγητή Dr. Masato Tanaka. Ο Ιατρός ειδικεύτηκε και εξειδικεύτηκε στην Γερμανία, αποκτώντας τον τίτλο του Ειδικού Χειρουργού Ορθοπεδικού, κατόπιν εξετάσεων, από τον Ιατρικό Σύλλογο του κρατιδίου του Βρανδεμβούργου (2020).Μετά τη λήψη της ειδικότητάς του, διετέλεσε Επιμελητής Α' Ορθοπεδικής και Τραυματιολογίας σε αναγνωρισμένο κέντρο Τραύματος της Γερμανίας (Sana Klinikum Niederlausitz). Μετά από πολυετή εμπειρία σε πρωτοπόρα Ορθοπεδικά Κέντρα και κέντρα Tραύματος της Γερμανίας, ο Ιατρός υπηρέτησε, ως συνεργάτης, στην Κλινική Σκολίωσης και Σπονδυλικής Στήλης του Γενικού Νοσοκομείου "ΚΑΤ" για ένα έτος (2022). Διαθέτει πληθώρα εμπειρίας και εξειδικεύεται στις χειρουργικές τεχνικές ελάχιστης επεμβατικότητας των παθήσεων και παραμορφώσεων της Σπονδυλικής Στήλης, στην ενδοσκοπική αποσυμπίεση των παθήσεων του Σπονδυλικού καναλιού, στις αρθροπλαστικές μεγάλων αρθρώσεων με πρωτόκολλα ταχείας μετεγχειρητικής αποκατάστασης και στην αρθροσκοπική αποκατάσταση αθλητικών κακώσεων. Το 2022, κατόπιν εξετάσεων, έγινε μέλος της Ευρωπαϊκής Εταιρείας Ορθοπεδικών Χειρουργών ( FEBOT). Ο Σαλαμαλίκης Νικόλαος διατηρεί ιδιωτικό Ιατρείο στους Αμπελοκήπους και στο Περιστέρι, ενώ παράλληλα διατελεί Επιμελητής στο 251 Γενικό Νοσοκομείο της Αεροπορίας.Χειρουργεί ιδιωτικά στο Νοσοκομείο Υγεία, στο Νοσοκομείο Ερρίκος Ντυνάν.Είναι απόφοιτος της Στρατιωτικής Σχολής Αξιωματικών Σωμάτων και της Ιατρικής Σχολής του Αριστοτελείου Πανεπιστημίου Θεσσαλονίκης (2009).

Dr. Sarantis Mixalis, MD, MSc, PhDc, is an Orthopedic Surgeon with a private practice in Psychiko. Concurrently, he serves as an Orthopedic Consultant specializing in Sports Injuries at Metropolitan Hospital. He has extensive experience, having completed his specialization at the General Children's Hospital "Agia Sofia" and the 4th Orthopedic Clinic of G.N.A. KAT, while also specializing at the same hospital in the Hand-Upper Limb-Microsurgery Clinic, the Sports Injuries Department, and the Pediatric Orthopedic Clinic. In 2018, he successfully completed advanced training in pediatric orthopedic trauma and pediatric skeletal deformities at the Orthopedic Hospital Speising (Vienna, Austria). Since 2019, he holds a Master's degree in "Metabolic Bone Diseases - Osteoporosis" from the Medical School of the National and Kapodistrian University of Athens. In 2020, he was appointed as a doctoral candidate by the Medical School of Athens, and since then he has been pursuing his doctoral thesis at the 2nd Orthopedic University Clinic of the University of Athens (Konstantopouleio Hospital – Agia Olga). He is an active member of the European Paediatric Orthopaedic Society (EPOS), the European Society for Sports Traumatology Knee Surgery and Arthroscopy (ESSKA), the Hellenic Society of Orthopaedic Surgery and Traumatology (EEHOT), and the Athens Medical Association. Finally, he has a rich academic portfolio, authoring numerous publications in peer-reviewed international journals (PUBMED) and actively participating in presentations at Greek and international conferences.

Mprilakis Emmanouil is an Orthopedic Surgeon who maintains two private practices, in Palaio Faliro and Psychiko. He holds a PhD and is a graduate of the Medical School of the National and Kapodistrian University of Athens. He possesses the "Advanced Trauma Life Support" and “Musculoskeletal Ultrasound” certifications from the American College of Surgeons and the Burwin Institute of Canada, respectively. He specializes in large joint arthroplasty (hip, knee, shoulder), knee and shoulder arthroscopy, and sports injuries. His expertise in the surgery of these joints is attributed to his advanced training in innovative surgical techniques. Additionally, he has served as the Orthopedic Surgeon for the Olympiacos Piraeus women's basketball team (for 2 years) and for "Panionios GS" (for 7 years), and has collaborated with numerous high-level teams and athletes. He is the Deputy Director of the 3rd Orthopedic Clinic at "Hygeia" Hospital and the Athens Center for Arthroscopy and Shoulder Surgery. He serves as the Secretary of the Sports Injuries Department of the Hellenic Society of Orthopedic Surgery and Traumatology and is a member of committees of both the European (ESSKA) and the International (ISAKOS) Societies of Sports Injuries. Finally, he is an active member of 14 Greek and international scientific societies, has published numerous scientific articles and presentations in Greek and international journals, and has delivered lectures at Greek and international sports medicine conferences.

Veves Aristeidis - Ilias is an Orthopedic Surgeon. He holds a degree from the Charles University Medical School in Prague. He specialized in Orthopedic Surgery in Sweden, with a focus on shoulder and knee arthroscopy, microsurgery of the hand and foot, and reconstructive hip surgery. He currently collaborates with hospitals in Sweden. He has a private practice and serves as an Orthopedic Surgeon at Athinaiki Clinic Hospital and the Therapis Private Hospital in Pagrati. He is a member of medical associations in Greece and Sweden, and as part of his lifelong education, he has attended numerous seminars both in Greece and internationally. He employs a contemporary diagnostic approach assisted by musculoskeletal ultrasound. "The goal is always to place the patient at the center; understanding and explaining the problem is paramount before concluding on the therapeutic approach."

Mpaltopoulos Ioannis is an Orthopedic Surgeon and maintains a private practice in Agia Paraskevi. He completed his medical studies at the National and Kapodistrian University of Athens (NKUA) and postgraduate studies in Health Services Management and Crisis Management. He obtained his specialty title from the 1st Orthopedic Clinic of KAT General Hospital. He possesses significant clinical experience and serves as an Orthopedic Surgeon and Traumatologist at the Athens Bioclinic.

Ο Μαλαχιάς Μιχαήλ-Αλέξανδρος είναι Ορθοπαιδικός Χειρουργός-Αθλητίατρος και Επίκουρος Καθηγητής Ορθοπαιδικής στην Ιατρική Σχολή EUC Φρανκφούρτης (Γερμανία). Διατηρεί το ιδιωτικό του ιατρείο στο Χαλάνδρι. Είναι πτυχιούχος και Διδάκτωρ της Ιατρικής Σχολής του Εθνικού και Καποδιστριακού Πανεπιστημίου Αθηνών. Ο ιατρός εξειδικεύεται στην αρθροσκοπική και επανορθωτική (αρθροπλαστικές) χειρουργική του ώμου, του γόνατος και του ισχίου. Επιπλέον, θεωρείται expert στις νέες βιολογικές θεραπείες (PRP) με καθοδήγηση υπερήχου (πρώτο Διδακτορικό στην Ελλάδα πάνω στο εν λόγω πεδίο), αλλά και στη θεραπεία των αθλητικών κακώσεων, όπου έχει λάβει την εθνική κλινική υποτροφία «Γεώργιος Νούλης», της Ελληνικής Αρθροσκοπικής Εταιρείας (αντιμετώπιση ρήξης μηνίσκου, ρήξης χιαστού, χόνδρινων βλαβών, αρθροσκόπηση ισχίου σε νέους, αρθροσκόπηση ώμου για ρήξη τενόντων στροφικού πετάλου, εξάρθρημα, κτλ.). Η μετεκπαίδευσή του (complex joint reconstruction fellowship) στο πεδίο της ελάχιστα επεμβατικής ρομποτικής αρθροπλαστικής γόνατος & ισχίου έχει πραγματοποιηθεί στο Hospital for Special Surgery (Νέα Υόρκη), το οποίο αξιολογείται, επί 12 συναπτά έτη, ως το κορυφαίο (Νο1) ορθοπαιδικό νοσοκομείο των ΗΠΑ. Πέραν τούτου, έχει μετεκπαιδευτεί, επί σειρά ετών (clinical fellowships), στον τομέα της αρθροσκοπικής χειρουργικής και της αντιμετώπισης αθλητικών κακώσεων, σε διεθνή ακαδημαϊκά κέντρα του υψηλότερου επιπέδου (ESSKA teaching centers), όπως η Clinica Ars Medica (Λουγκάνο, Ελβετία), και η ATOS Klinik (Χαϊδελβέργη, Γερμανία). Ο Επ. Καθηγητής Ορθοπαιδικής, κος Μαλαχιάς, είναι αναγνωρισμένος σε διεθνή συνέδρια για την ακαδημαϊκή κλινική έρευνά του και έχει συμμετάσχει σε άνω των 110 επιστημονικών ερευνών, δημοσιευμένων σε έγκριτα διεθνή περιοδικά (του Pubmed). Μετά από πολυετή χειρουργική εξειδίκευση στο εξωτερικό, επιστρέφει στη γενέτειρά του, την Αθήνα, για να ασκήσει την ορθοπαιδική επιστήμη, ως Διευθυντής της Γ’ Ορθοπαιδικής Κλινικής στο Therapis General Hospital, με βάση τα πλέον σύγχρονα διεθνή πρότυπα και επίκεντρο τον άνθρωπο.