Orthopaedic - Orthopaedic Surgeon with experience in Microsurgery in Attica

Dempegiotis Petros MD, MSc is an Orthopedic Surgeon with a private practice in Kypseli. He is a graduate of the Medical School of the National and Kapodistrian University of Athens and has attended numerous international educational seminars. He is also a certified physician in Neural Therapy. He is an affiliated physician at Euroclinic Athens, Doctor's Hospital, and Metropolitan General. With extensive experience in orthopedic disorders, he diagnoses and treats orthopedic conditions in both adults and children. Additionally, he manages cases such as tendinitis, osteoarthritis, cervical syndrome, sciatica, as well as pediatric orthopedics.

Antoniadou Thekla is an Orthopedic Surgeon and a PhD candidate at the National Technical University of Athens (NTUA), with a private practice in Palaio Faliro. She graduated from the Medical School of the University of Patras and completed postgraduate studies in "Exercise and Health" at the Medical School of the National and Kapodistrian University of Athens. She specialized at the 1st University Orthopedic Clinic of the Attikon University General Hospital. Her specialization continued at the Sydney Orthopaedic Research Institute and the Hospital for Special Surgery in New York. She has received a scholarship from the Hellenic Society of Reconstructive Microsurgery and

Hellenic Society of Hand Surgery and Upper Limb and has undergone further training in Hand Surgery and Reconstructive Microsurgery at Queen Victoria Hospital, NHS Trust in the United Kingdom. Finally, she possesses significant clinical experience, having worked in hospitals in the United Kingdom, and currently serves as an Orthopedic Surgeon at the Athens Medical Center and as a scientific associate of the 1st University Orthopedic Clinic of the University of Athens.

Gatos Giorgos, MD, MSc, is an Orthopedic Surgeon - Sports Medicine Specialist with expertise in Arthroscopic and Open Shoulder and Knee Surgery, Sports Injuries, Reconstructive Surgery, and modern combined Biological therapies. He maintains a private practice in Gerakas and simultaneously serves as Deputy Director of the 3rd Orthopedic Clinic at Hygeia-Mitera Hospital, as well as a Scientific Collaborator at the Psychiko Medical Center. He completed his postgraduate studies at the Medical School of the National and Kapodistrian University of Athens, with a thesis on Metabolic Bone Diseases.

Igglezos Nikolaos is an Orthopedic Surgeon, graduate of the Medical School of Comenius University of Bratislava, and in 2024 he graduated from the Master's Program (MSc) of the National and Kapodistrian University of Athens, specializing in Metabolic Bone Diseases. He maintains an active private collaboration with Metropolitan Hospital, where he also serves as an Attending Physician. Previously, he has worked in the Third Orthopedic Clinic of Athens General Hospital KAT, in the Microsurgery and Hand Surgery Department of KAT, as well as in the Sports Injuries Department of the same hospital, gaining extensive experience in trauma and total knee and hip arthroplasty. He has also worked in the Second Orthopedic Clinic of "Agia Sofia" Children's Hospital as an orthopedic surgeon, at Livadeia General Hospital, and earlier served as a surgical resident in General Surgery at the same hospital. With experience in contemporary orthopedics and an active scientific interest in metabolic bone diseases, he undertakes cases and provides individualized patient care. With a focus on sports injuries and reconstructive orthopedic surgery, he manages conservative treatment using biological therapies with platelet-rich plasma (PRP), as well as surgical repair when conservative treatment is not indicated. Finally, he accepts emergency cases on weekdays and holidays by telephone appointment.

Triantafyllidis Pantelis is an Orthopedic Surgeon with a clinic located in Galatsi, Marousi. He specializes in Knee and Hip Arthroplasty, Robotic Arthroplasty, Arthroscopic surgery of the knee, shoulder, and ankle, the treatment of Sports injuries, Osteoporosis, and fracture management. Additionally, during his specialty training, he has been trained in Microsurgery and upper limb surgery, as well as Pediatric Orthopedics. The clinic treats adult and adolescent patients with all types of orthopedic problems. Concurrently, he serves as the Director and Scientific Supervisor of the orthopedic department at Orthobiomed. He performs surgeries and collaborates with major hospitals in Athens, such as "Hygeia," where he also served as Deputy Director, and Mitera. He graduated from the Medical School of the University of Ioannina, holds a specialty title in Orthopedic Surgery from the Orthopedic Clinic of the University of Athens at KAT Hospital, and is a PhD candidate at the Medical School of the National and Kapodistrian University of Athens. He has participated in the education of students in Orthopedics and the first aid laboratory for Physiotherapy students. He has served as a physician for various teams and sports clubs and has operated on numerous athletes. He has participated as a speaker and organizer in numerous conferences, lectures, and presentations in Greece and abroad, as well as in writing articles for Greek and international scientific journals. Finally, he is a member of many Greek and international scientific societies.

Dimitrakis Nikolaos MD, MSc is an Orthopedic Surgeon and serves as an Assistant Consultant at the General Hospital "Asklipieio" Voula. He maintains a private practice in Glyfada within MEDIONE. He specialized in the Orthopedic Clinic - Sports Injuries Department at the General Hospital "Asklipieio" Voula, as well as at the General Children's Hospital "Agia Sofia" and the General Children's Hospital "P. & A. Kyriakou." As part of his specialty training, he was trained in the Hand - Upper Limb - Microsurgery Department at the Attica General Hospital KAT. He has completed postgraduate studies in "Metabolic Bone Diseases" at the Medical School of the National and Kapodistrian University of Athens, with a thesis on ''Congenital and Neuromuscular Scoliosis.'' He has also undergone further training in preventive screening for spinal deformities in students at the General Hospital of Piraeus "Tzaneio." In his practice, he manages cases spanning the entire spectrum of orthopedics, orthopedic surgery, and pediatric orthopedics, with specialization in traumatology, sports injuries, arthroscopy, and arthroplasty. Furthermore, the doctor has participated in numerous conferences and seminars both in Greece and internationally and is a member of the Hellenic Society of Orthopedic Surgery and Traumatology. Holder of the Diploma of the

Hellenic Spine Society 

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.

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.

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.

Markopoulos Xristos is an Orthopedic Surgeon and a PhD candidate at the Medical School of the University of Athens, with a private practice in Marousi. Concurrently, he serves as a Consultant in the Upper Limb and Microsurgery Department at YGEIA Hospital and has been a member of the medical team for the Panathinaikos BC basketball team. He graduated from the Medical School of the University of Eastern Piedmont in Northern Italy and subsequently specialized in Orthopedic Surgery at the 1st University Orthopedic Clinic of the University of Athens at "Attiko" Hospital. During his specialization, he focused particularly on the Pediatrics and Microsurgery departments at KAT Hospital. Additionally, he holds a postgraduate degree in Metabolic Bone Diseases - Osteoporosis from the National and Kapodistrian University of Athens. He is also a member of the Hellenic Osteoporosis Society and the Hellenic Pain Society. Finally, he has contributed to scientific papers and textbooks that have been presented at conferences and published in journals.

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.

Dr. Diakatos Andreas is an Orthopedic Surgeon who maintains a private practice in Ilioupoli. He was born in Athens. He began his specialty training in Orthopedic Surgery and Traumatology at the Asklipiio Voulas Hospital. For two years, he trained in Microsurgery at KAT Hospital and for one year in Pediatric Orthopedics at the same hospital. In 2014, he obtained the Orthopedic Surgery and Traumatology specialty certification and has been practicing privately since then. He is currently affiliated with Hygeia Hospital, where a significant number of robotic surgeries are performed, a cutting-edge technology in knee and hip arthroplasty within this specialty. Finally, it would be remiss not to mention his training in Bologna, Italy, under Professor Maurilio Marcacci, as well as in Leeds, United Kingdom.

Orthopedic Surgeon Mpekas Georgios maintains private clinics in Pangrati, Agioi Anargyroi, and Palaio Faliro. He graduated from the Medical School of the National and Kapodistrian University of Athens and subsequently attended a postgraduate program in Metabolic Bone Diseases. He specialized in General Surgery at the General Hospital of Messolonghi "Chatzikosta" and in Orthopedics at the General Hospital "Asklipieio" Voula and the Children's General Hospital "Panagiotis & Aglaia Kyriakou," where he also engaged in Pediatric Orthopedics. Additionally, he completed a six-month specialization in the Microsurgery - Upper Limb department at the Attica General Hospital KAT. He has worked as an Orthopedic Surgeon Consultant at Metropolitan Hospital. The physician holds an Advanced Life Trauma Support diploma and is a member of the Hellenic Osteoporosis Foundation. Besides his private clinics in Pangrati and Agioi Anargyroi, Mpekas Georgios also works as an Orthopedic Surgeon at the Athens Medical Center (Marousi Clinic) and as an Associate Orthopedic Surgeon at the private clinic REA. Concurrently, he works as a Pediatric Orthopedic Consultant at the Pediatric Center of Athens (Athens Medical Group). The physician approaches each case with particular sensitivity, providing appropriate treatment tailored to the specific needs of each patient and their condition. He undertakes the surgical management of emergency orthopedic cases (fractures). Furthermore, his medical team manages numerous elective orthopedic surgical cases (arthroscopies, total arthroplasties, upper limb microsurgery, sports injuries). Finally, modern biological therapies (PRP, hyaluronic acid and cortisone injections) are performed in the clinic.

Ο Κουτσουράδης Παναγιώτης MD, MSc είναι Ορθοπαιδικός Χειρουργός με ιδιωτικό ιατρείο στο Παλαιό Φάληρο. Είναι πτυχιούχος της Ιατρικής Σχολής του Εθνικού και Καποδιστριακού Πανεπιστημίου Αθηνών και εργάστηκε ως ειδικευόμενος Γενικής Χειρουργικής στη Β΄Χειρουργική Κλινική του Ειδικού Αντικαρκινικού Νοσοκομείου Πειραιά "Μεταξά". Μετέπειτα έγινε δεκτός στο University College of London (UCL), όπου και παρακολούθησε το μεταπτυχιακό πρόγραμμα με αντικείμενο την αθλητιατρική και τις αθλητικές κακώσεις (Sports Medicine, Exercise and Health). Παράλληλα, παρακολουθούσε και συμμετείχε σε χειρουργικές επεμβάσεις που λάμβαναν χώρα στο University College Hospital του Λονδίνου. Κατόπιν εξετάσεων και εκπόνησης της μεταπτυχιακής διατριβής του με τίτλο "A Service Evaluation On Outcome Predictors To A Non-operative Multimodal Programme For Knee Osteoarthritis", έγινε κάτοχος του τίτλου Master of Science (MSc) in Sports Medicine, Exercise and Health. Απέκτησε τον τίτλο ειδικότητας κατόπιν εξετάσεων τον Μάιο του 2019. Aπό το 2014 έως το 2019, ειδικεύτηκε στην Ορθοπαιδική Χειρουργική και Τραυματολογία. Συγκεκριμένα εργάστηκε για 4 έτη στην Ορθοπαιδική Κλινική του 417 ΝΙΜΤΣ και για 1 έτος στην Α΄ Ορθοπαιδική Κλινική του Νοσοκομείου Παίδων "Η Αγία Σοφία". Κατά τη διάρκεια του ανωτέρω χρονικού διαστήματος εκπαιδεύτηκε σε όλο το φάσμα της Χειρουργικής Ορθοπαιδικής και Τραυματολογίας και ιδιαίτερα στην αρθροσκοπική και επανορθωτική χειρουργική ενηλίκων. Από τον Ιούλιο του 2019 έως και τον Μάιο του 2024 εργαζόταν ως Επιμελητής στην Κλινική Επανορθωτικής Χειρουργικής Ποδιού και Ποδοκνημικής του ιδιωτικού θεραπευτηρίου Mediterraneo Hospital στη Γλυφάδα, ενώ από τον Ιούνιο του 2024 κατέχει ανάλογη θέση στο Ιατρικό Κέντρο Αθηνών(Παλαιό Φάληρο). Από το Φεβρουάριο του 2019 ο ιατρός είναι υποψήφιος διδάκτωρ της Ιατρικής Σχολής του Εθνικού και Καποδιστριακού Πανεπιστημίου Αθηνών.Είναι συγγραφέας εννέα δημοσιεύσεων σε διεθνή αναγνωρισμένα επιστημονικά περιοδικά, καθώς και άλλων εργασιών και ανακοινώσεων σε ελληνικά επιστημονικά συνέδρια. Τέλος, στα πλαίσια της συνεχούς πρακτικής και θεωρητικής του εκπαίδευσης έχει εκπαιδευθεί και πιστοποιηθεί σε διάφορα courses που έλαβαν χώρα στην Ελλάδα και στο εξωτερικό, ενώ παράλληλα έχει παρακολουθήσει και παρακολουθεί διάφορα επιμορφωτικά σεμινάρια.

Dr. Anagnostou Konstantinos, MD, is an Orthopedic Surgeon with a private practice in Argyroupoli. He is a PhD candidate at the Medical School of the University of Patras and a graduate of the same institution. He obtained his Orthopedic Surgeon title in 2013 from the University Orthopedic Clinic at the University General Hospital of Rio, Patras, while part of his specialization was also completed at the "P. & A. Kyriakou" General Children's Hospital of Athens. In addition to his private practice, Dr. Anagnostou collaborates with MITERA Hospital - HYGEIA Group, serving as the Consultant of the 4th Orthopedic Clinic - Sports Injuries and Knee and Hip Arthroplasties. He has participated in a large number of conferences, educational seminars, and projects, focusing primarily on upper limb disorders and injuries, as well as sports injuries. Finally, he is a member of the Athens Medical Association, the Hellenic Society of Orthopedic Surgery & Traumatology, the Hellenic Arthroscopy Society, and AO TRAUMA.

Mr. Siopis Xristos is an Orthopedic Surgeon with private practices in Thessaloniki (28 Agias Sofias, 2nd Floor) and Veria (32 El. Venizelou, 3rd Floor). He is a graduate of the Medical School of the University of Thessaly. Since 2021, he has been a Collaborating Surgeon at the A’ Orthopedic Clinic of the Interbalkan Medical Center of Thessaloniki and a direct collaborator of Dr. Stylianos Kapetanakis in the Spine & Deformities Department. Simultaneously, he serves as a Collaborating Physician at the Athens Medical Center in Marousi and Psychiko. He specializes in knee and hip arthroplasties with customized implants, spinal surgery, knee and shoulder arthroscopies, as well as pediatric orthopedics. In his private practices, he provides a wide range of services tailored to the individual needs of each patient, always with respect to the patient himself.

Tolis Konstantinos MD, MSc, PhDc is an Orthopedic Surgeon with a private practice in Kolonaki. He graduated from the Medical School of the National and Kapodistrian University of Athens and is a PhD candidate at the same institution. Additionally, he holds a postgraduate degree in "Metabolic Bone Diseases" with a thesis on the "Pathophysiology of Bone Pain" from the Medical School of the National and Kapodistrian University of Athens. He initially specialized in General Surgery at the General Hospital of Pyrgos "Andreas Papandreou," in Pediatric Orthopedics at the First Pediatric Orthopedic Clinic of the General Children's Hospital of Athens "P. & A. Kyriakou," and finally in General Orthopedics at the First University Orthopedic Clinic of the University General Hospital "Attikon." From 2014 to 2020, he was an Academic Fellow at the Laboratory for Research of Musculoskeletal Disorders "Th. Garofalidis," focusing on "Microsurgery" at the General Hospital of Attica KAT. He is the Deputy Director of the 8th Orthopedic Clinic at Metropolitan General and the Scientific Director of the Upper Limb - Microsurgery Clinic. Concurrently, he collaborates with several clinics within Attica. He has participated in numerous conferences in Greece and abroad, presenting poster presentations, oral communications, and lectures. Finally, he is a member of the Athens Medical Association, the Hellenic Society of Orthopedic Surgery and Traumatology, the Hellenic Osteoporosis Foundation, and the Hellenic Society for Hand Surgery.

Ο Μάζης Γεώργιος είναι Διευθυντής Ορθοπαιδικός Χειρουργός, υπεύθυνος του τμήματος Χειρουργικής Άνω Άκρου (Ωμού & Αγκώνα) στην Ευρωκλινική Αθηνών. Επίσης, εργάζεται στο Ιατρικό Π. Φαλήρου ως υπεύθυνος του τμήματος Χειρουργικής Άνω Άκρου (Ωμού & Αγκώνα) και Άκρας Χειρός ενώ παράλληλα είναι συνεργάτης του Τμήματος Χειρουργικής Άνω Άκρου και Άκρας Χειρός στην Ορθοπαιδική Κλινική «OSTEON» στο Ιατρικό Αθηνών.

Ο κ. Μάζης κατέχει την θέση του Διευθυντή Ορθοπαιδικού Χειρουργού (Consultant Orthopaedic Surgeon) από τον Ιανουάριο 2017 στο Πανεπιστημιακό Νοσοκομείο Queen's NHS Barking, Havering and Redbridge, του Λονδίνου. Διδάκτωρ της Ιατρικής σχολής του Πανεπιστημίου Αθηνών (ΕΚΠΑ) από τον Ιανουάριο του 2014 (PhD degree) με βαθμό «Άριστα». Έγινε, κατόπιν εξετάσεων, “Fellow of European Board of Orthopaedics and Traumatology” τον Οκτώβριο 2014. Από τον Οκτώβριο του 2016 είναι εξεταστής (examiner) στο Queens Hospital Clinical FRCS (Orth) Course. Τον Ιανουάριο του 2011 έλαβε το μεταπτυχιακό τίτλο σπουδών (Master of Science, MSc) με θέμα «Μεταβολικά Νοσήματα των Οστών» μετά από διετή παρακολούθηση και παρουσίαση διατριβής με βαθμό «Άριστα». Είναι απόφοιτος της Ιατρικής Σχολής Αθηνών (2003 – Εθνικό Καποδιστριακό Πανεπιστήμιο Αθηνών) Από το 2012 αφοσιώθηκε στο ιδιαίτερο γνωστικό του αντικείμενο, τη Χειρουργική Άνω Άκρου και Άκρας Χειρός, καθώς και στις αρχές της ιατρικής επιστήμης και ηθικής, έχοντας στοχευμένη μετεκπαίδευση σε κορυφαία κέντρα του Ηνωμένου Βασιλείου. Διετέλεσε έμμισθος κλινικός υπότροφος (Senior Post CCT Clinical Fellow, 2015) στον τομέα της Χειρουργικής Άνω Άκρου (Upper Limb Surgery ) στο Royal Berkshire Hospital NHS, Reading, Berkshire, UK, υπό την καθοδήγηση του Professor Ofer (εμπνευστής και σχεδιαστής της ανάστροφης ολικής αρθροπλαστικής ώμου VERSO) που μαζί με τον Steve Copeland (εμπνευστής και σχεδιαστής της αρθροπλαστικής ώμου επιφανείας Copeland) αποτέλεσαν πρωτοπόρους στην Χειρουργική του Άνω Άκρου σε παγκόσμιο επίπεδο . Στη συνέχεια, διετέλεσε έμμισθος κλινικός υπότροφος (Senior Post CCT Clinical Fellow, 2016) στο Royal National Orthopaedic Hospital, Stanmore, στον τομέα της Χειρουργικής Άνω Άκρου και σύμπλοκων Αρθροπλαστικών Ώμου και Αγκώνα (Upper Limb and Complex Shoulder and Elbow Arthroplasty Surgery), υπό την καθοδήγηση των Simon Lambert και Ian Bayley (εμπνευστής και σχεδιαστής της ολικής αρθροπλαστικής ώμου Bayley Walker).

Είναι μέλος του British Elbow and Shoulder Society από το 2015. Επιπλέον, είναι μέλος πολλών ελληνικών και ξένων επιστημονικών επιτροπών και οργανώσεων και παραμένει ακαδημαϊκά ενεργός, ως Διδάκτορας του Πανεπιστημίου Αθηνών, έχοντας στο ενεργητικό του πολλαπλές δημοσιεύσεις άρθρων και πρωτοποριακών χειρουργικών τεχνικών σε επιστημονικά περιοδικά και επιθεωρήσεις του εξωτερικού καθώς και συμμετοχή στην συγγραφή αλλά και μετάφραση σύγχρονων συγγραμμάτων Ορθοπαιδικής.

Spyridon Kseinis is an Orthopedic Surgeon maintaining private clinics in Pefki and Psychiko. He is the Deputy Director of the 1st Clinic of Sports Injuries at METROPOLITAN GENERAL and holds a Doctorate from the Medical School of the National and Kapodistrian University of Athens since May 2014, awarded with the grade "Excellent." Since 2008, he has collaborated with the Hellenic Football Federation (EPO) and serves as the physician for the National Futsal Team. Concurrently, he is UEFA-accredited, having completed the "UEFA Football Doctor Education Programme." He is a member of the Hellenic Society of Orthopedic Surgery and Traumatology and the Hellenic Society for the Study of Bone Metabolism. He trained at the General Accident Hospital KAT, specializing in fracture management, reconstructive joint surgery (knee and hip arthroplasty), and sports injuries. Following his specialization, he assumed the position of Registrar at the 2nd Orthopedic Clinic of KAT Hospital, where he remained for four years. During his tenure as Registrar, he gained substantial surgical experience, serving as the lead Orthopedic Surgeon in numerous emergency shifts and successfully performing a large number of surgical interventions across the full spectrum of trauma (upper and lower limb fractures, hip fractures, tendon ruptures, hand surgery), reconstructive surgery (hip and knee arthroplasties), and sports injuries (arthroscopic surgery). Additionally, he received training in Pediatric Orthopedics at the "Agia Sophia" Children's Hospital and in disorders of the Hand during his tenure at the University Hospital "Sahlgrenska University Hospital" in Gothenburg, Sweden.