Which cell type widens the gubernacular canal in eruption models where eruption is blocked?

• A. Osteoclasts
• B. Osteoblasts
• C. Fibroblasts
• D. Chondrocytes

Answer: (A)

Widening the route for eruption relies on bone resorption along the gubernacular canal, and that job is done by osteoclasts. These cells break down mineralized bone in the jaw to create a clear path from the follicle toward the occlusal surface. In eruption models where eruption is blocked, the presence and activity of osteoclasts in the canal area are what enlarge the passage, enabling movement if other factors allow it. Osteoclasts accomplish this by secreting acids and proteolytic enzymes that dissolve bone, a process regulated by signals from surrounding tissues, including the dental follicle. In contrast, osteoblasts build bone, fibroblasts organize connective tissue, and chondrocytes form cartilage, none of which drive the resorption needed to widen the canal.