Periodontal Ligament Quiz

<p>Undifferentiated mesenchymal cells (UMC) in the periodontal ligament (B)</p> Signup and view all the answers

<p>The level of function of the tooth (E)</p> Signup and view all the answers

<p>Cementum is avascular and receives its nourishment from the adjacent periodontal ligament. (D)</p> Signup and view all the answers

<p>Increased sensitivity due to dentin exposure (A)</p> Signup and view all the answers

<p>It supports and forms tooth sockets (B)</p> Signup and view all the answers

<p>Bundle bone (B)</p> Signup and view all the answers

<p>Remodeling (B)</p> Signup and view all the answers

<p>1.08 mm (D)</p> Signup and view all the answers

<p>Fenestrations (C)</p> Signup and view all the answers

<p>Periosteum and endosteum (A)</p> Signup and view all the answers

<p>10% (A)</p> Signup and view all the answers

<p>Hydroxapatite (A)</p> Signup and view all the answers

<p>Acellular afibrillar cementum (A), Acellular extrinsic fiber cementum (C)</p> Signup and view all the answers

<p>At the CEJ (C)</p> Signup and view all the answers

<p>Intermediate cementum (B)</p> Signup and view all the answers

<p>60-65% (A)</p> Signup and view all the answers

<p>Cementum is more resistant to resorption than bone. (A)</p> Signup and view all the answers

<p>Cementum (C)</p> Signup and view all the answers

<p>Plum stone (A)</p> Signup and view all the answers

<p>0 mm or close to 0 mm (A)</p> Signup and view all the answers

<p>3.5 mm - 4.5 mm (A)</p> Signup and view all the answers

<p>Alveolar mucosa (B)</p> Signup and view all the answers

<p>1.56 mm +/- 0.39 mm (B)</p> Signup and view all the answers

<p>The marginal gingiva is unattached and the attached gingiva is firmly bound to the underlying tissue. (D)</p> Signup and view all the answers

<p>Pyramidal or Col (C)</p> Signup and view all the answers

<p>To mark the border between the free gingiva and the attached gingiva. (D)</p> Signup and view all the answers

<p>Mucogingival junction (A)</p> Signup and view all the answers

<p>To aid in the attachment of the gingiva to the teeth (A), To provide a barrier against bacterial penetration (C)</p> Signup and view all the answers

<p>Keratinocytes (D)</p> Signup and view all the answers

<p>1:36 (A)</p> Signup and view all the answers

<p>Stratified squamous non-keratinized epithelium (B)</p> Signup and view all the answers

<p>It has two basement membranes – the internal and external basal lamina. (B)</p> Signup and view all the answers

<p>The turn-over rate of keratinized epithelium is slower than non-keratinized epithelium. (C)</p> Signup and view all the answers

<p>To function as antigen-presenting cells. (A)</p> Signup and view all the answers

<p>To increase the strength and stability of the epithelium. (D)</p> Signup and view all the answers

<p>The thinner epithelium allows for easier bacterial attachment and biofilm formation. (A), The lack of keratinization in the col makes it a favorable environment for the proliferation of bacteria. (C), The non-keratinized epithelium lacks a tight barrier, allowing bacteria to penetrate deeper into the gingiva. (D)</p> Signup and view all the answers

<p>Fibroblasts (A)</p> Signup and view all the answers

<p>The PDL space narrows around functional teeth, aiding in efficient load transfer. (A)</p> Signup and view all the answers

<p>Sharpey's fibers provide a direct connection between the cementum and alveolar bone. (A)</p> Signup and view all the answers

<p>GCF provides lubrication for tooth movement during mastication. (D)</p> Signup and view all the answers

<p>All of the above. (D)</p> Signup and view all the answers

<p>Oral epithelium, sulcular epithelium, junctional epithelium (D)</p> Signup and view all the answers

<p>Masticatory mucosa and alveolar mucosa (D)</p> Signup and view all the answers

Gingiva consists of oral, sulcular, and junctional epithelium.

Gingival epithelium turnover occurs every 10 to 12 days.

Primary barrier of the gingiva; stratified squamous, keratinized or parakeratinized.

Thin, non-keratinized, stratified squamous epithelium in the gingival sulcus.

Collar-like band with two basement membranes, attaches to tooth surface.

Biochemical process where keratinocytes migrate and differentiate, forming keratin.

Cells that produce pigment, present in the basal and spinous layers of gingiva.

Type of mucosa that is non-keratinized.

The mucous membrane lining the oral cavity, including different types such as masticatory and lining mucosa.

The part of the oral mucosa covering the alveolar processes and surrounding the neck of the teeth.

The edge of the gingiva that forms a collar around the tooth, also known as free gingiva.

The shallow crevice around the tooth, defined by the tooth surface and the gingival epithelium.

The part of the gingiva firmly connected to the underlying alveolar bone, extending from the mucogingival junction.

Fluid from the gingival sulcus that contains inflammatory exudate.

Non-keratinized epithelial area between adjacent teeth.

The gingival tissue that occupies the gingival embrasure between adjacent teeth.

Type of mucosa that includes the gingiva.

The boundary between the attached gingiva and the alveolar mucosa.

The average thickness of the free gingiva, typically around 1.56 mm.

Connective tissue surrounding tooth roots, attaching them to alveolar bone.

Terminal portion of periodontal fibers that attach to cementum and bone.

Most common type of collagen found in periodontal ligament.

Cementum consists of 45-50% inorganic materials (calcium, phosphate) and 50-55% organic materials (type 1 collagen).

There are four types: acellular afibrillar, acellular extrinsic fiber, cellular mixed stratified, and cellular intrinsic fiber cementum.

Acellular cementum lacks cells and covers root dentin from CEJ to apex, but can be thin around the apex.

Includes cells (cementocytes) and is mainly found in the apical third of the root; thicker than acellular cementum.

CEJ is where the cementum overlaps enamel; 60-65% overlaps, 30% meets sharply, and 5-10% has no cementum.

Cementum is essential for anchoring the tooth and is more resistant to resorption than bone.

Cementum's resistance to resorption allows for safe orthodontic tooth movement.

A poorly defined zone at the cementodentinal junction, containing remnants of Hertwig's sheath.

Procedure to remove calculus and bacterial deposits from teeth.

Loss of cementum can expose dentin and cause sensitivity.

Compensatory growth in cementum occurs in response to occlusal attrition.

The bone structure that supports tooth sockets in the jaw.

The external layer of dense bone in the alveolar process.

The inner alveolar bone seen as a radiographic line.

Areas where root is denuded of bone, covered only by periosteum and gingiva.

The process of bone resorption and formation for homeostasis and repair.

The process where tissues become hardened by calcium deposition.

A non-collagenous protein associated with bone that aids in calcification.

Includes fibroblasts, cementoblasts, osteoblasts, and stem cells.

Area with glycosaminoglycans, glycoproteins, and high water content.

Physical support, formative, nutritional, and sensory roles of the periodontal ligament.

Calcified tissue covering the tooth root, providing attachment for fibers.

Cementum is softer than dentin, light yellowish, and less lustrous.