Your quality of life and mobility is our goal

Less pain more quality of life

Welcome - Your care from a single source

The Clinik Witwity is internationally renowned for the bioprosthesis procedure and has co-developed and successfully applied this procedure in well over 70,000 cases since 1985.

The clinic treats patients from all health insurance funds and has a team that expertly cares for patients from home and abroad.

Surgical and orthopaedic clinic

Every year we perform more than 2,000 operations in two modern operating theatres. As the first specialist clinic for arthroscopic joint surgery in Germany, we have treated over 70,000 satisfied patients. Of course, we are equipped with the most modern technical devices, for example, we use digital X-rays for diagnosis. In order to stimulate fibrocartilage regeneration, we regularly perform so-called CPM ("continous passive motion") with a movement machine immediately after the operation. We have our physiotherapy department directly in house to be able to guarantee optimal results both on the ward and on an outpatient basis.

Surgical outpatient clinic and trauma surgery practice

In the consultation hours of the surgical outpatient clinic and trauma surgery practice Witwity in Stade, patients of all health insurance funds are in the best of hands after a sports accident or with persistent pain of the musculoskeletal system. The team at the Witwity practice specialises in orthopaedics and trauma surgery as well as spinal surgery. Our specialists will discuss your individual treatment needs and the options for further treatment with you.

Come to our consultation

Decades of proven experience with more than 70,000 successful treatments speaks for itself. 

Clinic: +49 4141 9590

Practise: +49 4141 7891191

Our Experts

Jörg Witwity

Medical Director / Chief Physician

Marek Holysz

Specialist in orthopedics and trauma surgery

Dr. med. Matthias Berg

Specialist in surgery, orthopedics and sports medicine



Abrasion arthroplasty

The bioprosthesis is a real alternative to the artificial joint, because the operation for it is minimally invasive and the patient's own joint remains intact. Unlike the artificial joint, where the patient has no options after surgery, if the bioprosthesis fails, the patient can have an artificial joint replacement implanted without any problems or additional risks.

The bioprosthesis relies on the regenerative abilities of the body; no foreign material is inserted into the joint. Instead, the bone under the destroyed cartilage is milled and replacement cartilage is formed from the resulting blood cake, which can replace the original almost perfectly.

The abrasion arthroplasty used for the bioprosthesis is a comparatively gentle procedure. An arthroscope, a special endoscope, is used to perform the operation - which means that there are hardly any scars and the pain after the procedure can hardly be compared to that after inserting an artificial prosthesis.

Nevertheless, it is a very complicated operation, which requires the highest precision.

The bone layer underneath the destroyed cartilage is milled with millimeter precision. As a result, multipotent stem cells, cytokines and growth factors emerge from this boundary layer, from which a so-called blood cake is formed. In the following months, the activity of the cells contained therein transforms this into cartilage tissue. This replacement cartilage does not completely correspond to the original cartilage, but can replace it almost perfectly.

Cartilage cell transplantation

Joint preserving treatment of articular cartilage defects exclusively with the body's own cells

Joint preserving treatment of articular cartilage defects exclusively with the body's own cells
Cartilage damage is very often the cause of pain in the knee. Malpositions or injuries (trauma) lead to painful osteoarthritis. The longer the defective cartilage remains untreated, the more the damage progresses. The knee joint wears out until eventually only an artificial knee joint can help.

Our primary goal is to avoid the implantation of an artificial joint (endoprosthesis) and to preserve your joint. Under certain conditions, it is possible to rebuild defective cartilage. In these cases, we transplant autologous articular cartilage to repair cartilage damage. Cell transplantation with the body's own cartilage cells does not require any artificial or foreign materials and is a natural procedure for the successful long-term treatment of even larger cartilage defects. Since natural cartilage tissue grows back, complete healing is possible.

The statutory health insurance funds cover the costs of autologous cartilage cell transplants in the knee joint. Reimbursement for cartilage transplants in other joints must be clarified in advance with the insurance provider.

The process: Natural cartilage from the laboratory

If the replacement of damaged articular cartilage makes sense from a medical point of view (indication) and the patient is suitable for the procedure, we reconstruct cartilage tissue from the patient's own cartilage cells. In an initial athroscopic operation, we remove a small piece of healthy cartilage from the affected joint, which serves as a template for the subsequent cartilage graft.

In the laboratory, we isolate the cartilage cells and then cultivate the patient's own cell constructs without the addition of foreign substances or genetic modifications in the patient's own blood serum in a cell culture process over a period of about six weeks. In effect, we reproduce your own cartilage.

Small operation - big effect

After about six weeks, we perform another minor surgical procedure in which we remove the damaged cartilage mass and insert the cultured cartilage cells into the defect of the affected knee joint. There, they attach on their own and form new cartilage tissue that bonds with the remaining healthy cartilage in the knee. In this way, the body's own cartilage tissue can once again take over the protective shock absorber function in the joint.

Healing of the cartilage damage
Avoidance of joint replacement
Pain reduction
Athroscopic surgery
Resilient "new" cartilage tissue
No rejection reaction thanks to endogenous substances
Reimbursement by statutory health insurers


Partial or total joint replacement

In endoprosthetics (Greek endo for 'inside'), diseased joints are replaced with endoprostheses. Endoprostheses, also called joint replacements, are implants that remain permanently in the body and replace a damaged joint completely or partially. A distinction is made between total endoprosthesis (TEP), which replaces a complete joint, and hemiprosthesis, which replaces parts of a joint. Endoprosthetics is used to treat a wide variety of joints. In particular, knee joints, hip joints, shoulder joints and ankle joints are among the areas of application. Endoprostheses are made of metal, plastic (polymers) or ceramics to achieve the longest possible preservation and tolerance of the body. A combination of materials is possible.


Holistic treatment tailored to your needs
Practice and clinic under one roof

A referral is not necessary. Patients with public health insurance as well as private patients can make an appointment directly with the Witwity practice without a specialist referral in order to be treated by our experts. Should a surgical intervention become necessary, we can issue the corresponding referral directly on site following the consultation. In this way, you benefit from short waiting times and quick appointments, and thus timely relief.

Modern diagnostic procedures

Patients with a wide variety of complaints feel at home in the surgical outpatient clinic and the specialist clinic Witwity.
First-class diagnostic procedures, state-of-the-art technical equipment and bright treatment rooms, together with our experienced team, ensure optimal care and rapid diagnosis.



Clinic Dr. Witwity has co-developed the procedure and decades of experience
- Minimally invasive procedure
- Joint remains in its anatomy
- No foreign material in the joint
- No prosthesis loosening
- No prosthesis infection
- Less pain than with an artificial prosthesis
- Artificial joint as a later option

Your way to us

Right next to the Stade train station near to Hamburg


Neubourgstraße 4 21682 Stade


Clinic: +49 4141 9590
Practise: +49 4141 7891191



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