Glenoid component for shoulder arthroplasty
A method of making a glenoid component for shoulder arthroplasty includes obtaining a model of a glenoid vault morphology normalized from a population of a plurality of scapulae, the model being defined by a plurality of mutually parallel, triangular cross-sections, and producing a stem portion of the glenoid component based on the model.
1. A method of making a glenoid component for shoulder arthroplasty, the method comprising:
obtaining a model of a glenoid vault morphology normalized from a population of a plurality of scapulae, the model being defined by a plurality of mutually parallel, triangular cross-sections, and
producing a stem portion of the glenoid component based on the model.
2. The method of claim 1 , in which distance between any one adjacent pair of the triangular cross-sections is the same as the distance between any other of the adjacent pairs of triangular cross-sections.
3. The method of claim 1 , in which the number of mutually parallel triangular cross-sections which are used to define the model is exactly five.
4. The method of claim 1 , in which the step of obtaining the model comprises:
obtaining a complex three-dimensional model of a glenoid vault morphology normalized from a population of a plurality of scapulae by means of a volumetric scanning technique,
obtaining an intermediate three-dimensional model from the complex model by inscribing a plurality of mutually parallel triangular cross-sections within the boundaries defined by the walls of the complex model, and
obtaining a simplified three-dimensional model by selecting five of the mutually parallel triangular cross-sections from the intermediate model which are spaced apart equidistantly along the superior-inferior axis and which account for 90% of the volume of the intermediate model.