Dr Jonker takes orthopaedic challenges heads-on

Knee and Shoulder Procedures

Pain and musculoskeletal conditions affect people of all ages at any time, restricting their ability to work and enjoy life. Fortunately, everyone can benefit from the expertise of Dr. Hannes Jonker, from people with traumatic injuries who need limb-saving surgery. The right treatment can lead to a happier, more productive life. Dr. Jonker performs general orthopaedic surgery with a focus on knee and shoulder procedures and treatment. In addition, he considers conservative treatment options before introducing surgery.

The Knee: A complex Joint

Degeneration is one of the main knee joint diseases. It is the deterioration and wear of the cartilage and causes the bones to rub directly against each other. This wear realises in pain. The wear can intensify over time and limit motion.

Knee problems can interfere your lifestyle, either limiting sports participation or getting up from a chair to walk. Such interference has a huge impact on the quality of life.

Firstly, Dr. Jonker considers conservative measures to control your pain, inflammation and limited mobility, but if the conservative treatments are not effective in relieving your symptoms, he may recommend a Partial or Total Knee Replacement.

Dr. Jonker tailors each replacement specifically to the patient’s osteoarthritis area, acuteness and the patient’s overall medical condition.

The Shoulder: Most Mobile Joint

Dr. Jonker follows a multidissiplinary treatment approach and addresses acute and chronic injuries and conditions of the shoulder, holistically. He incorporates the latest musculo-skeletal research, innovation, and technology into his practice to provide patients with the best care possible. He also applies personalised rehabilitation plans to reduce patient discomfort, increase arm mobility and speed up recovery.

An injury to your shoulder or a shoulder condition must be diagnosed properly to determine the most effective treatment plan.

Knee procedures

Sphere total knee replacement

As one of the most advanced total knee implants available today, the GMK Sphere provides maximum functional stability to increase patient satisfaction after a total knee replacement.
The GMK Sphere total knee replacement is a good choice, because: It feels more normal. It is stronger when going up and down stairs. It has superior single-leg weight bearing. It feels more stable overall and during flexion. It has fewer clunks, pops and clicks.

Internal Brace surgical technique

Dr. Jonker only uses the InternalBrace surgical technique to support the primary repair and not to replace the standard of care. He applies the InternalBrace surgical technique for soft-tissue-to-bone fixation and not for bone-to-bone fixation.

All-Inside ACL reconstruction

The All-Inside ACL reconstruction is a complete arthroscopic technique. It involves the treatment of the anterior cruciate ligament (ACL), which is in the middle of the knee. It is an advanced technique through which Dr Jonker replaces the torn anterior cruciate ligament with tissue taken from the patient self (autograft). The procedure requires that the femur and tibia be infiltrated to allow passage for the graft material to reconstruct this ligament. The procedure provides benefits like minimal risk of inflammation, less post-operative pain and a much quicker recovery. It often reduces swelling and soft tissue hematomas (clotted blood in the tissue). In addition, it can shorten the rehabilitation process.

Unicompartment (partial) knee replacement

In some cases, instead of a total knee replacement, a unicompartmental knee replacement (or partial replacement) can be applied to repair knee damage triggered by degeneration. The specific advantages of the unicompartmental knee replacement include that smaller incisions are made, less bleeding and bone loss occur and a quicker recovery is expected in contrast to a total knee replacement. Your kneecap remains in its natural position which will enable you to regain much of the strength in your quadriceps. If knee degeneration is limited to only one of the compartments of the knee a unicompartmental knee replacement could be a sound option. Consultation with Dr Jonker is critical in order to determine the best surgical option for the knee problems you experience.

Meniscal repair

For severe meniscus tears, surgery is typically the best course of treatment. The goal of surgery is to preserve the meniscus by repairing or removing the torn part. During arthroscopic surgery, Dr Jonker inserts a camera into a small incision in the knee(keyhole surgery), which guides him in repairing or removing the tear with instruments inserted through another small incision.

Shoulder procedures

Primary shoulder replacement

With a primary shoulder replacement, Dr Jonker replaces the humeral head (ball) of the shoulder joint with an implant that includes a stem with a smooth rounded metal head. He replaces the glenoid (socket) with a smooth, rounded plastic cup that fits the head of the ball perfectly. In general, you can expect to achieve near normal range of motion following shoulder replacement surgery. However, if you have severe restricted motion which has been present for many years, you may be unable to achieve full motion despite an accurately performed operation and dedicated physiotherapy. Still, you can expect to achieve about 75% of normal motion.

Reverse shoulder replacement

If shoulder arthritis occurs with torn rotator cuff muscles, another specific surgical procedure, known as a reverse shoulder replacement, may be recommended. This means that the normal structure of the shoulder joint is reversed. Thus, the ball and socket configuration is inverted, meaning that the ball portion of the implant is attached to the glenoid (where the socket normally is), and the artificial socket is attached to the humeral head (where the ball normally is) in the form of a plastic cup. This composition allows the stronger deltoid muscles of the shoulder to bear much of the work of moving the shoulder which increases the joint stability. A reversed procedure is often indicated for patients with compromised rotator cuff function

Rotator cuff repair - Arthroscopic procedure

A complete rotator cuff tear will not heal and surgery is usually required if you want to return your shoulder to optimal function. In order to repair the rotator cuff, the rotator cuff tendon needs to be reattached to the humerus. Although this can be performed through open, mini open or all arthroscopic procedures, Dr. Jonker primarily applies the all-arthroscopic procedure with single or double row repair techniques.

Acromioclavicular reconstruction

Disorder of acromioclavicular and coracoclavicular ligaments is a common injury of the shoulder. Dr. Jonker primarily implements this technique for acute acromioclavicular joint stabilisation as it enables a quick return to activity. It is a simple, reproducible, minimally invasive technique and could be performed through a key hole or arthroscopic procedure.

Distal biceps repair

Dr. Jonker makes a single anterior incision to repair the biceps tendon.

Instability procedure: Bankart repair

Dr. Jonker performs a Bankart repair to restore the over stretched or torn labrum and capsule deep within the shoulder joint. He uses sutures and small bone anchors. He will insert an arthroscope through a small skin incision from the back of the shoulder. Then he inserts special instruments through portals from the front of the shoulder. This enables Dr. Jonker to see the operation on a television screen.

Instability procedure: Congruent Arc Latarjet technique

The Congruent Arc Latarjet technique has the advantages of improving both bony and soft tissue problems with a strong fixation, allowing early active rehabilitation. Dr. Jonker performs this procedure when there is some bone loss from the front of the glenoid (because of a bony bankart lesion or repeated dislocations wearing away the front of the glenoid). The procedure involves the transfer of coracoid with its attached muscles to the deficient area over the front of the glenoid to replace the missing bone. The transferred muscle acts as additional muscular support to prevent further dislocations. The procedure has a high success rate because of its triple effect, a better or totally restored glenoid contact surface; the conjoint tendon that stabilises the joint when the arm is externally rotated; and the repaired capsule Through this procedure it is also possible to address other problems in the joint such as a rotator cuff tear or SLAP tear. It is a less invasive procedure with lesser risk of post-operative problems.

Frequently Asked questions

Orthopaedics is a medical speciality focusing on the diagnosis, correction, prevention and treatment of patients with disorders of the bones, joints, muscles, ligaments, tendons and nerves. These parts of the body make up the musculoskeletal system. 

We like to get patients in as quickly as possible. The sooner you call or fill out the online request form on the website, the sooner we can book your appointment and begin the process to making your life normal again.

In general, apply ice within the first 24-48 hours of an injury to reduce swelling and pain. After an injury, following the PRICE protocol: 

Protection, Rest, Ice, Compression and Elevation.

Never use ice directly on the skin. Depending on the area of the injury, use ide for 10 to 20 minutes. The thicker the tissue of the injured area, the longer the application time. Knee injuries typically require 15 minutes of icing, while areas with more musculature, such as the quadriceps and hamstrings, require 20 minutes. Thinner tissue, such as ankles and feet, requires only 10 minutes.

Generally< use heat for muscle pain or stiffness. Never apply heat when swelling or inflamation is present. Applying a heating pad usually relieves minor stiffness or tension after 15 to 20 minutes. Direct heat for longer periods, llike taking a warm bath, can help relieve moderate to severe pain. Heat also helps to warm up muscles before any physical activity.

Often the source of shoulder pain is a torn rotator cuff. The two main causes of rotator cuff tears are injury and degeneration. You can further damage your rotator cuff with continued use after a tear. If you are experiencing chronic shoulder or arm pain, it’s best to visit your orthopaedic specialist. 

Knee pain is another common orthopaedic issue that affects people of all ages. Knee pain is generally the result of either injury or inflammation. The knee is one of the joints most prone to injury, which may result in acute pain. Arthritis and other inflammatory diseases can cause chronic knee pain.

Most people can return to normal everyday activities such as dressing themselves and grooming within the first two weeks after successful shoulder replacement surgery. It is good to have someone who can help with daily activities for the first couple of weeks after surgery..

Contact our Office at 018 293 3474 for an appointment or request an appointment by following the links online on our website. We follow-up online requests with a date and time and will confirm your appointment telephonically.

Dr Hannes Jonker, orthopaedic surgeon

In Potchefstroom, North West, Dr. Jonker is one of the most respected orthopaedic surgeons focusing on shoulder and knee treatment and surgery. Among the techniques he uses to speed up recovery are minimally invasive arthroscopic surgery, patient-specific instrumentation and kinematic alignment technique in total knee replacement.


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