All Free Oral Histology MCQs with Answers

• 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

Explanation: The periodontal ligament contains mainly type I collagen, with a significant contribution from type III collagen that forms part of its…

• A. Lacunae
• B. Reversal lines
• C. Coupling
• D. Canaliculi

Explanation: Coupling is the coordinated relationship in which osteoclast bone resorption is followed by osteoblast-mediated bone formation during…

• A. Gingivodental
• B. Cemental fibres
• C. Horizontal fibres
• D. Transseptal fibres

Explanation: Transseptal fibres run from the cementum of one tooth across the interdental septum to the cementum of the adjacent tooth, helping…

• A. Dental follicle
• B. Epithelial rests of malassez
• C. Alveolar bone
• D. Hertwig's root sheath

Explanation: Sharpey's fibres are the embedded terminal portions of the principal periodontal-ligament fibres, which develop from the dental follicle.

• A. Type I collagen fibres
• B. Oxytalan fibres
• C. Elastic fibres
• D. Type II collagen fibres

Explanation: Type I collagen fibres predominate in the periodontal ligament and provide its tensile strength.

• A. Oblique
• B. Horizontal
• C. Transseptal
• D. Apical

Explanation: Transseptal fibres pass from the cementum of one tooth to the cementum of its neighbour, so they are not attached to alveolar bone.

• A. Horizontal
• B. Transeptal
• C. Apical
• D. Oblique

Explanation: Oblique fibres form the largest and most numerous principal fibre group in the periodontal ligament.

• A. Periodontal membrane
• B. Cementum
• C. Gubernacular cords
• D. Alveolar sockets

Explanation: The periodontal membrane, now termed the periodontal ligament, suspends the tooth within its socket and allows an independent, resilient…

• A. Dentogingival
• B. Oblique
• C. Transeptal
• D. Horizontal

Explanation: Oblique periodontal fibres are arranged to resist intrusive or compressive forces produced during mastication by converting them into…

• A. Elastic fibres
• B. Tomes fibres
• C. Sharpey's fibres
• D. Ray's fibres

Explanation: Sharpey's fibres are the portions of periodontal-ligament principal fibres embedded in cementum and alveolar bone.

• A. Peridontal ligament the cementum and the alveolar bone
• B. Gingiva and cementum
• C. Cementum and periodontal ligament
• D. Gingiva, cementum and alveolar bone

Explanation: The tooth attachment apparatus consists of cementum, periodontal ligament and alveolar bone; gingiva belongs to the periodontium but is…

• A. Increased thickness
• B. Increased vascularity
• C. Increased fibroplasia
• D. Decreased in number of cementicles

Explanation: With age, the periodontal ligament becomes more fibrotic because fibroplasia and the proportion of nonfunctional collagen increase, while…

• A. Horizontal
• B. Oblique
• C. Alveolar crest
• D. Transseplat

Explanation: The principal periodontal ligament groups are alveolar crest, horizontal, oblique, apical and interradicular fibres.

• A. Presence of actin fibres and shape change
• B. The number or organelles
• C. size of the cells
• D. Collagen fibre formation

Explanation: Periodontal ligament fibroblasts contain actin filaments and can alter their shape in response to mechanical stress, helping them remodel…

• A. 6 weeks
• B. 10 weeks
• C. 18 weeks
• D. 16 weeks

Explanation: The developing components of the temporomandibular joint become evident during the tenth week of intrauterine development.

• A. Avascular
• B. Devoid of nervous tissue
• C. Avascular & deviod of nervous tissue
• D. None of the above

Explanation: The central part of the TMJ articular disc is composed of dense fibrous tissue and lacks both blood vessels and nerve fibres.

• A. Reversal of function of horizontal and oblique fibres
• B. Down growths of gingival epithelium
• C. Gingival cysts formed from cell rests
• D. Due to deposition of cementum and bone

Explanation: Age-related narrowing of the PDL in a labially positioned mandibular canine results mainly from continued deposition of cementum on the…

• A. Maintains the mesiodistal width
• B. Prevent rotation
• C. Prevent extrusion
• D. All of the above

Explanation: Horizontal PDL fibres run at right angles from cementum to alveolar bone and resist horizontal displacement, helping preserve the tooth’s…

• A. Dental pulp
• B. Lamina propria
• C. Odontogenic epithelium
• D. Vestibular laminaConsult Online Doctors

Explanation: Epithelial rests of Malassez are remnants of Hertwig’s epithelial root sheath, which is derived from odontogenic epithelium.

• A. Trans-septal
• B. Horizontal
• C. Apical
• D. Oblique

Explanation: Oblique fibres form the largest group of principal periodontal ligament fibres and help resist intrusive and vertical forces on the tooth.