system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Disadvantage of cast perforated resin retained fpd is
assistant
The correct answer is  Disadvantage:

Weakening of the metal retainer by the perforations.
Exposure to wear of the resin at the perforations.
Limited adhesion of the metal provided by the perforations.