MCQs on Periodontal Ligament - Oral Histology part 2

# Width of PDL is :
A. O.10 mm
B. 0.50 mm
C. 0.25 mm
D. 0.75 mm

# Intermediate Plexus is seen in the:
A. Cementum
C. Pulp
D. Dentin

# In mammals independent and tough suspension for teeth is provided by:
A. Alveolar sockets
B. Cementum
C. Gubernacular cords
D. Periodontal membrane

# Bone adjacent to periodontal ligament that contains a great number of Sharpey's fibers is known as :
A. Lamina dura
B. Bundle bone
C. Lamina propria
D. Lamina densa

# The most abundant principal fiber group in periodontal ligament is :
A. Horizontal
B. Transseptal
C. Apical
D. Oblique

# Collagen biosynthesis occurs inside the :
A. Chondroblasts
B. Odontoblasts
C. Osteoblasts
D. Fibroblasts

# Which of the following groups of fibers are not attached to alveolar bone ?
A. Apical
B. Horizontal
C. Oblique
D. Transseptal
# Principal fibers of PDL are attached to :
A. Alveolar bone proper
B. Bundle bone
C. Lamellar bone
D. Cortical bone

# Periodontal ligament has predominantly:
A. Type II collagen fibers
B. Oxytalan fibers
C. Elastic fibers
D. Type I collagen fibers

# The calcified mass found in PDL are:
A. Cementicles
B. Osteoblasts
C. Cementoclasts
D. Osteoclasts

# Sharpey's fibers are derived from:
A. Hertwig's root sheath
B. Epithelial rest cells of Malassez
C. Alveolar bone
D. Dental follicle

# Intermediate plexus is absent in which of the following principal fibers:
A. Gingival
B. Oblique
C. Horizontal
D. Transseptal

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