1 Principles topenlarge
Key to successful hemiarthroplasties
Exposure of the shoulder joint.
In contrast to hemiarthroplasties in other B and C fractures, the tuberosities are not fractured in C3.1 fractures and the humeral head is dislocated in isolation. Therefore, the approach to the glenohumeral joint is completely different. Depending on the surgeon’s preference, an osteotomy of the lesser tuberosity or a tenotomy of the subscapularis tendon may be used. However, an osteotomy of the lesser tuberosity is recommended.
- Correct determination of the surgical landmarks
Proper determination of prosthesis size and position
2 Treatment topenlarge
The implantation of a hemiarthroplasty in C3.1 fractures is comparable to hemiarthroplasty in the degenerative omarthrosis.
Key steps are:
- Retrieval of humeral head
- Measurement of humeral head size
- Exposure of proximal humerus in external rotation and adduction
- Exposure of most medial insertion line of supraspinatus tendon
- Rasping of humeral shaft
- Probe insertion
- Trimming of anatomic neck using oscillating saw and using probe as a template
- Defining final size and position of prosthetic humeral head
- Assembly of prosthesis according to individual parameters
- Insertion of definitive prosthesis
- Closure of osteotomy/tenotomy
C3.1 fractures are rare. Therefore, the surgical procedure of this treatment is not detailed here. Please refer to the manufacturer’s technique guide.