Dental OSCE (Objective Structured Clinical Examination) Practice Exam

What is the minimum number of implants required for an overdenture?

1. 1

2. 2

3. 3

4. 4

The correct answer is: 2

For an overdenture, the minimum number of implants typically required is two. This is due to the need for adequate support and stability for the prosthesis. An overdenture is designed to fit over one or more remaining natural teeth, roots, or implants; it relies on these anchoring elements to function properly. Having two implants provides a balanced distribution of forces during chewing and helps prevent movement of the denture, enhancing the patient’s comfort and functionality. Additionally, two implants allow for a more distributed load, reducing the risk of implant failure. Using just one implant can result in an imbalance and insufficient support, leading to greater mobility of the overdenture and a less effective chewing function. In clinical practice, two implants are considered a standard guideline for overdentures, especially in the mandibular arch. This approach optimally enhances denture retention and stability while minimizing the potential for bone loss and complications associated with inadequate support.