The minimum mesiodistal space required for placement of two standard diameter implants (4.0 mm diameter) between teeth is
**Core Concept**
The minimum mesiodistal space required for dental implant placement is crucial to ensure proper fitting, function, and to prevent damage to adjacent teeth. This space is determined by the diameter of the implant and the biologic width. **Dental implants**, particularly those with a **standard diameter** like 4.0 mm, require specific space to accommodate the **implant body** and allow for **bone remodeling** and **soft tissue** growth around the implant.
**Why the Correct Answer is Right**
For two standard diameter implants (4.0 mm each), the minimum space is calculated considering the diameter of each implant plus the additional space needed for bone and soft tissue health. Generally, at least 1.5 mm of bone should be present between the implant and the adjacent tooth root, and 1.5 to 2 mm between two implants for proper **osseointegration** and to minimize the risk of **bone resorption**. Thus, for two 4.0 mm implants, the minimum mesiodistal space would be 4.0 mm (first implant) + 3 mm (minimum space between implants, considering 1.5 mm on each side for bone) + 4.0 mm (second implant), totaling 11 mm, but considering the question's context about minimum space between teeth for placing two implants, we focus on the inter-implant distance and implant size.
**Why Each Wrong Option is Incorrect**
**Option A:** This option does not provide enough space for two standard implants and the necessary bone and soft tissue.
**Option B:** Similarly, this option is insufficient for accommodating two implants with the required inter-implant space.
**Option D:** This option exceeds the minimum requirement but is not the minimum space needed.
**Clinical Pearl / High-Yield Fact**
A critical point in **dental implantology** is respecting the minimum mesiodistal space to avoid **implant failure** due to inadequate **osseointegration** or **peri-implantitis**. The general rule of thumb is to have at least 1.5 mm of space between an implant and an adjacent tooth and 3 mm between two implants.
**Correct Answer:** Correct Answer: C. 7 mm