A 3D printed model was used to improve the understanding of the extent of a developmental glenoid pathology.
An elderly female patient was admitted to the Ulster Hospital with extensive pain and restricted movement in her left shoulder. The patient had previously undergone bone resurfacing of the humeral head and erosion of the glenoid cavity had started because of surrounding muscular anatomy failing. Both metallic artifact and complex anatomical arrangement making image interpretation difficult.
The surgeon was provided with a 1:1 scale 3D printed model of the shoulder girdle including the metallic shoulder resurfacing component (including proximal aspects of the humerus and superior portion of the scapula (Fig 1, 2 & 3).
“I was provided with a 3D model of a complex shoulder pathology which allowed me to see exactly where the glenoid had worn over time due to the resurfaced femur and where the new articulating surface had formed superiorly to this. The models allowed me to plan with a much greater level of accuracy and the extra information provided avoided any surprised during surgery.”
Mr. A. Adair
Consultant Orthopedic Surgeon, Ulster Hospital, Northern Ireland
The model gave a much greater understanding of the complexity of the articulating surfaces of the shoulder and allowed accurate planning for the joint resurfacing (Fig 4 & 5). It was also used to determine that a new articulating surface had formed on the patient’s acromion process.
Using the 3D printed models, trial operations can be carried out and used intraoperatively as guides to improve planning and reduce the surgical time associated with difficult cases and allow much easier communication with patients and clinicians. Articular lesions and deformity are particularly clear on the models, compared to standard images.