Cape Shoulder Institute


Mediclinic Winelands Orthopaedic Hospital Website

The Cape Shoulder Institute Stellenbosch Staff

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Meet our Staff

Dr de Beer has a proud family of staff, who practice with him in Stellenbosch.

Dr Renier Orthopaedic Surgeon Cape Shoulder Institute

Dr Renier Kriel

Orthopaedic Surgeon

Dr Renier Kriel studied medicine at Stellenbosch University and qualified in 2011. He has worked in Nelspruit, Kimberley and Worcester before starting his registrar training time at Tygerberg Hospital in 2018. He qualified as an Orthopaedic Surgeon in 2022.

He is married to Elsa, who is a physiotherapy and they have a little boy named Ruben.

Sam Miller

Practice Manager

Sam Miller joined Dr de Beer’s practice in February 2011, and swiftly became an indispensable part of his team. She is Dr de Beer’s personal assistant and Practice Manager. Her main roles in patient care are the theatre bookings, and managing all accounts and medical aid related queries.

Sam Miller Practice Manager Cape Shoulder Institute
Sabelo Melapi-scrub Technician Cape Shoulder Institute

Sabelo Melapi

Scrub Technician

Sabelo Melapi has been part of Dr de Beer’s practice since 2012.  He came to us having completed his Operating Room Practitioners Course at Mediclinic Cape Town, and has become Dr Joe’s right hand man.

Tossie Beetge


Tossie Beetge has been part of Dr de Beer’s practice since 2016. She assists in the smooth running of the reception, and appointment bookings.

Tossie Beetge Administration Cape Shoulder Institute
Delmaine Los Administration Cape Shoulder Institute

Delmaine Los


Delmaine Los recently joined the team.  She manages the switchboard and consultation bookings.

Dr Joe de Beer specialises in the following shoulder surgery types.

Frozen Shoulder

Frozen Shoulder is a condition with no known cause in the majority of cases, with spontaneous onset. It is most common in females (40-50 years) but could affect males and other age groups.

Calcific Tendinitis

A calcium deposit accumulates in one of the tendons of the shoulder. The cause is unknown and not related to injury, diet or osteoporosis. The patient most commonly affected is a female 40-50 years of age.

Pectoralis Major Tendon Rupture

The pectoralis major (large pectoral) is a large muscle on the front of the upper chest and arm. There are 2 “heads” – the clavicular and sterno-costal.

Proximal Humeral Fractures

Fractures of the proximal humerus (ball) account for 5-15 % of all fractures. Majority of these occur in elderly individuals with osteoporosis, and are a cause of major morbidity. In younger individuals, these fractures occur after high-velocity trauma.

SLAP Tears

S.L.A.P. is an acronym for Superior Labrum Anterior Posterior, which simply means that the attachment of the long tendon of the biceps is torn away from the upper end of the shoulder socket. (Superior Labrum = Biceps attachment, Anterior = front, Posterior = back).

Shoulder Instability & Dislocation

The shoulder consists of a ball (humeral head) and socket (glenoid). The ball is stabilized in the socket by a cartilage rim (“labrum”, which means “lip”) and the ligaments, which attach to the labrum.

Subscapularis Tendon Tears

The subscapularis is a most important muscle at the anterior (front) of the shoulder joint. It is often mentioned separately from the rest of the rotator cuff (supraspinatus, infraspinatus and teres minor) but is essentially part of this group of muscles.

Rotator Cuff Tears

Most tears are as a result of degeneration or “wear and tear”. The circulation to the tendon becomes impaired in older people and leads to degenerative tears.

Osteoarthritis of the Shoulder (Arthritis)

The shoulder joint (gleno-humeral joint) is one of the most mobile joints in the body. The gleno-humeral joint consists of a ball (humeral head) and socket (glenoid). As in any other joint, the bone surfaces are covered with a specialised cartilage layer.


A shoulder condition found mostly in people in the 40-60 year old age group.
The overlying acromion may squeeze or impinge upon the rotator cuff, causing inflammation and pain when elevating the arm.

Thoracic Outlet Syndrome

The thoracic outlet is the upper aperture of the chest, between the collar bone and the first rib.This narrow passageway is crowded with blood vessels that run out of the chest to the arm (subclavian vein and artery), as well as the nerves that exit the spine in the neck to supply the arm.

Suprascapular Nerve Entrapment

Suprascapular nerve injuries have become increasingly recognized as a cause of shoulder pain and dysfunction1. Recent advances in diagnostic and surgical techniques have simplified the management of injuries of this nerve.

Clavical Fracture

The clavicle is prone to fracture because of its very superficial localisation. A fall onto the arm, a lateral blow or a direct impact over the clavicle can cause a fracture.

The Biceps Tendon

The Biceps is an upper arm muscle that acts across the shoulder and elbow joints. At the elbow, it helps to bend the joint. At the shoulder, its function is more complex and incompletely understood.

Acromio-Clavicular Joint (AC Joint) Degeneration

This is the small joint on the top of the shoulder. It connects the tip of the clavicle (collar bone) to the acromion (shoulder bone). It is held together by ligaments between the two bones as well as strong ligaments between the collar bone and the coracoid (a protrusion from the shoulder blade).

Acromio-clavicular (AC) Joint Dislocations

The acromio-clavicular joint is between the clavicle (collar bone) and the acromion (shoulder bone). This injury usually results from a fall onto the tip of the shoulder or on to the back of the shoulder.


Os-acromiale is a loose / mobile acromion of the shoulder which may or may not cause pain. In the most cases the loose acromion may go undetected as it does not lead to any painful symptoms.

Shoulder Injections

Injections around the shoulder joint are necessary for diagnostic and therapeutic reasons in the course of evaluation of shoulder pain. The injection consists of local anaesthesia and cortisone, either separately or mixed together.