In this Post you will be able to take quiz containing important MCQs of Oral Histology and topic covered in this Quiz will be Periodontal Ligament. Correct Answers are Marked in Bold and Blue colour.
Periodontal Ligament Multiple Choice Questions : Oral Histology
- Which of the following is correct:
A. Fibronectin helps in attachment of fibroblasts to collagen
B. Cementicles are found in periodontal ligament of order individuals
C. The large nerve fibres are myelinated and are concerned with discerment of touch
D. The small nerve fibres may or may not be myelinated and are concerned with discrement of pain
E. All of the above
- In a dried skull, holes on the lingual aspects of the deciduous teeth are called:
A. Volkmann canals
B. Canals of Hirchfeld and Zuckerland
C. Herversian canals
D. Gubernacular canals
- The type of bone present in the labial area of anterior teeth is:
A. Cortical
B. Cancellous
C. Osteophytics
D. Exophytic - Width of PDL is:
A. 0.10 mm
B. 0.50 mm
C. 0.25 mm
D. 0.75 mm - The periodontal ligament is approximately:
A. 0.25 mm in thickness
B. 0.5 mm in thickness
C. 0.75 mm in thickness
D. mm in thickness - Development of supporting tissues of the tooth is initiated by:
A. Cells of dental follicle
B. Cells of odontogenic layer
C. Cementoblasts
D. Cells of the gingiva - Width of the periodontal ligament is least at:
A. Cervical third
B. Apical third
C. Fulcrum of rotation
D. It has uniform width - Cementicles are found in the:
A. Gingiva
B. Periodontal ligament
C. Alveolar bone
D. Cementum - Periodontal ligament is made up of:
A. Type I collagen
B. Type I and Type III collagen
C. Type I and Type II collagen
D. Type I and Type IV collagen - Interdependency of osteoblasts and osteoclasts in bone remodeling is called as:
A. Lacunae
B. Coupling
C. Reversal lines
D. Canaliculi - Periodontal fibres joining cemental surface of one tooth, to cemental surface of adjacent tooth are called:
A. Gingivodental
B. Cemental fibres
C. Horizontal fibres
D. Transseptal fibres
- Sharpey’s fibres are derived from:
A. Hertwig’s root sheath
B. Epithelial rests of malassez
C. Alveolar bone
D. Dental follicle
- Periodontal ligament has predominantly:
A. Type II collagen fibres
B. Oxytalan fibres
C. Elastic fibres
D. Type I collagen fibres
- Which of the following groups of fibres are not attached to alveolar bone:
A. Transseptal
B. Horizontal
C. Oblique
D. Apical - The most abundant principle fibre group in periodontal ligament is:
A. Horizontal
B. Transeptal
C. Apical
D. Oblique
- In mammals independent and tough suspension for teeth is provided by:
A. Alveolar sockets
B. Cementum
C. Gubernacular cords
D. Periodontal membrane
- Group of fibres, which resist the masticatory forces:
A. Dentogingival
B. Transeptal
C. Oblique
D. Horizontal - Fibres of periodontal ligament embedded in the bone are:
A. Sharpey’s fibres
B. Tomes fibres
C. Elastic fibres
D. Ray’s fibres - The attached apparatus of tooth is composed of:
A. Gingiva, cementum and alveolar bone
B. Gingiva and cementum
C. Cementum and periodontal ligament
D. Peridontal ligament the cementum and the alveolar bone
- Age changes in periodeontal ligament include which of the following:
A. Increased fibroplasia
B. Increased vascularity
C. Increased thickness
D. Decreased in number of cementicles - Collagen molecule exhibits all of the following features except:
A. Triple pleated sheath
B. Mostly contains glycine residues
C. Exhibit cross striations at 64 μm
D. Intracellular in nature
- Which of the following is not the principle fibre group of the periodontal ligament:
A. Horizontal
B. Oblique
C. Alveolar crest
D. Transseplat
- A special feature of the periodontal ligament fibroblasts is:
A. The number or organelles
B. Presence of actin fibres and shape change
C. size of the cells
D. Collagen fibre formation - The component of future T.M.J shows development at:
A. 6 weeks
B. 10 weeks
C. 18 weeks
D. 16 weeks - Centre of the disc in TMJ is:
A. Avascular
B. Devoid of nervous tissue
C. Avascular & deviod of nervous tissue
D. None of the above - Narrowing of periodontal ligament in labially placed mandibular canine with age is due to:
A. Due to deposition of cementum and bone
B. Down growths of gingival epithelium
C. Gingival cysts formed from cell rests
D. Reversal of function of horizontal and oblique fibres - The main function of horizontal fibers of P.D ligament is:
A. Prevent extrusion
B. Prevent rotation
C. Maintains the mesiodistal width
D. All of the above - The rest of malassez in the periodontal ligament are derived from:
A. Dental pulp
B. Lamina propria
C. Odontogenic epithelium
D. Vestibular lamina - The most abundant group of fibers in the PDL are:
A. Trans-septal
B. Horizontal
C. Oblique
D. Apical - True about osteoclasts:
A. Monocytes are precursor cells of osteoclasts
B. The plasma membrane of osteoclasts adjacent to bone that is being resorbed is known as striated or ruffled border
C. Contain lysosomes with acid phosphates
D. All of the above are true
- Sharpey’s fibres are present in:
A. Bone
B. Periosteum
C. Periodontal ligament
D. All of the above - Intermediate plexus is absent in which of the following principle fibres:
A. Gingival
B. Oblique
C. Horizontal
D. Transseptal - The calcified mass found in the PDL are:
A. Cementicles
B. Osteoblasts
C. Cementoclasts
D. Osteoclasts - Principal fibres of periodontal ligament are attached to:
A. Alveolar bone proper
B. Bundle bone
C. Lamellar bone
D. Cortical bone - Collagen biosynthesis occurs inside the:
A. Chondroblasts
B. Odontoblasts
C. Osteoblasts
D. Fibroblasts
- Bone adjacent to periodontal ligament that contains a great number of sharpey’s fibres is known as:
A. Lamina dura
B. Bundle bone
C. Lamina propria
D. Lamina densa - Intermediate plexus is seen in the:
A. Cementum
B. PDL
C. Pulp
D. Dentin - The vascular supply of the periodontal ligament is:
A. Greatest in the middle-third of a single rotted tooth
B. Greatest in the middle-third of a multirooted tooth
C. A net like plexus that runs closer to the cementum than to the bone
D. A net like plexus that runs closer to the bone than to the cementum
- All of the following cells of periodontal ligament are of mesenchymal origin except:
A. Fibroblasts
B. Multi totipotent cells
C. Cementoblasts
D. Cell rests of malassez
- Remnants of the Hertwig’s root sheath are found in:
A. Gingiva
B. Alveolar bone
C. Periodontal ligament
D. Cementum - Anchoring fibrils are composed of:
A. Type V and VII collagen
B. Type I and III collagen
C. Type IV collagen
D. Type IV and III Collagen - The periodontal ligament:
A. Derives its blood supply primarily from the branches of vessels entering the pulp
B. Has a slow rate of turn over
C. Contains epithelial cells
D. Comprises primarily of type II collagen