Which statement about intertubular dentin is true?
1). More mineralized than peritubular
2). Forms bulk between tubules, contains Type I collagen network, less mineralized than peritubular, contains proteoglycans
3). No collagen
4). Forms inside tubule

Width of predentin increases in:
1). Vitamin D deficiency / rickets and hypophosphatasia
2). Hypercalcemia
3). Fluorosis
4). Normal aging

Which factor does NOT increase dentin permeability?
1). Acid etching
2). Removal of smear layer
3). Sclerotic dentin formation
4). Cutting with bur without water

The DEJ scalloping is due to:
1). Enamel spindles
2). Interlocking of enamel and dentin for better adhesion - convexities towards dentin
3). Tomes granular layer
4). Predentin

What is osteodentin?
1). Dentin containing cell inclusions, bone-like, seen in reparative dentin
2). Normal circumpulpal dentin
3). Mantle dentin
4). Enamel