Abstract
The attachment system presented offers a prefabricated pin and post technique or use of a plastic pattern in a metal casting. Both provide the advantages of positive retention, stress-breaking effect, ease of maintenance, clinical or laboratory activation, and simplicity of technique. Both have the disvantages of nonadjustable retention, nonparallelism of post portion to root axis, and unknown long-term effect. The casting system is the preferred method because of its accurate fit and smaller occlusal height.
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