Rests of Malassez found in the periodontal ligament originate from_____________?
Show answer Hide answer
Answer: C. Odontogenic epithelium
Explanation
Epithelial rests of Malassez are microscopic remnants of Hertwig's root sheath. Hertwig's root sheath originates directly from the odontogenic epithelium during tooth development. These persistent cell clusters remain quiescent within the periodontal ligament throughout life. Hertwig's epithelial root sheath molds root shape and stimulates adjacent dentin formation. The sheath breaks down into isolated cell strands as root development progresses. Periodontal ligament tissue surrounds these residual epithelial cell nests.
Inflammatory stimuli can cause these cell rests to proliferate and form radicular cysts. Researchers study Malassez rests for their potential role in periodontal tissue regeneration. Histological identification confirms their epithelial origin within connective tissue. Dental pulp forms the central core of the tooth rather than originating root sheath remnants. Lamina propria is the connective tissue layer underlying oral mucous membrane surfaces. Vestibular lamina gives rise to the oral vestibule rather than periodontal ligament rests.
Related questions
Q1. Fully developed enamel consists of an inorganic matter percentage of roughly____________?
Show answer Hide answer
Answer: D. 96%
Fully matured and mineralized dental enamel is composed of approximately ninety-six percent inorganic matter. This high percentage consists of dense hydroxyapatite crystals packed into structural rods. The remaining four...
Q2. Radicular pulp maintains continuity with periapical tissues through the____________?
Show answer Hide answer
Answer: D. Apical foramen
The apical foramen provides the primary opening at the root tip of teeth. It allows radicular pulp to maintain direct continuity with periapical tissues. Blood vessels and nerves pass through this opening into the tooth....
Q3. Glandular secretion of fluoride into the oral cavity falls within a range of_____________?
Show answer Hide answer
Answer: C. 0.007-0.005 ppm
Fluoride is actively secreted by major and minor salivary glands into the oral cavity in extremely minute quantities. Glandular secretion contributes a tiny basal level of systemic fluoride to resting whole saliva and or...
Q4. In adults, the apical foramen of maxillary teeth measures approximately______________?
Show answer Hide answer
Answer: A. 0.4 mm
In adult maxillary teeth, the average diameter of the major apical foramen is approximately 0.4 mm. This opening allows blood vessels and nerves to enter the dental pulp chamber smoothly. Endodontic instruments are sized...
Q5. The periodontal ligament is characterized by the fact that_____________?
Show answer Hide answer
Answer: C. Contains epithelial cells
The periodontal ligament characteristically contains epithelial cell rests of Malassez. These microscopic cell clusters are remnants of Hertwig root sheath. Their presence distinguishes this ligament from other standard...
Q6. The thinnest epithelial layer in the oral cavity is located within the____________?
Show answer Hide answer
Answer: D. Sublingual mucosa (floor of mouth)
The sublingual mucosa located in the floor of the mouth is lined by a very thin, non-keratinized stratified squamous epithelium. Its lack of a protective keratinized surface layer and minimal connective tissue thickness...