Antimicrobial Properties in Gingival Connective Tissue

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Questions and Answers

What is the average measurement of the supracrestal tissue attachment?

0.97 mm

1.07 mm

2.04 mm (correct)

4.3 mm

Which nerve is primarily responsible for the sensory nerve supply to the periodontal ligament?

Trigeminal nerve (correct)

Facial nerve

Glossopharyngeal nerve

Vagus nerve

Which of the following accurately describes the connective tissue attachment above the alveolar bone crest?

Ranges from 1.5 mm to 4.0 mm

About 1.07 mm (correct)

Typically 1.5 mm

Approximately 0.75 mm

What does the nerve supply to the periodontium primarily respond to?

Pain and pressure Signup and view all the answers

Which condition is characterized by changes in the gingival plexus and nerve supply to surrounding tissues?

Periodontal disease Signup and view all the answers

Which of the following primarily facilitates the connection between cementum and alveolar bone?

Sharpey's fibers Signup and view all the answers

Which fiber group is NOT classified as a principal fiber group of the periodontal ligament?

Transseptal gingival Signup and view all the answers

What is one of the key functions of the periodontal ligament?

Absorbs impact of occlusal forces Signup and view all the answers

What is the average thickness of the periodontal ligament?

0.2 mm Signup and view all the answers

What cellular process occurs in the periodontal ligament when altered forces are applied?

Resorption of older collagen and remodeling of ligament Signup and view all the answers

What is the predominant cell type in the gingival connective tissue?

Fibroblasts Signup and view all the answers

Which of the following fibers connects the gingiva to the tooth?

Gingivodental fibers Signup and view all the answers

What role do macrophages play in gingival connective tissue?

They provide host defense and repair. Signup and view all the answers

Which fiber type runs horizontally between adjacent teeth in the periodontal ligament?

Transseptal fibers Signup and view all the answers

Which of the following is NOT a function of the periodontal ligament?

Maintaining the tone of the free gingiva Signup and view all the answers

What percentage of the gingival connective tissue is comprised of collagen fibers?

60% Signup and view all the answers

Which component is part of the alveolar process?

Cementum Signup and view all the answers

Which clinical feature involves the role of polymorphonuclear leukocytes in periodontal ligaments?

Defense against infection Signup and view all the answers

Study Notes

Gingival Connective Tissue (Lamina Propria)

Connective tissue of the gingiva consists of two layers: papillary layer and reticular layer.
Composition: 60% collagen fibers, 5% fibroblasts, and 35% vessels, nerves, and matrix.

Functions of Gingival Connective Tissue

Protects and supports the junctional epithelium.
Maintains the tone of attached gingiva.
Shields the periodontal ligament.
Houses nerves and blood supply.

Gingival Fiber Bundles

Gingivodental fibers: Attach gingiva to tooth, embedded in cementum between the cementoenamel junction (CEJ) and bone crest.
Circular fibers: Encircle each tooth within the free gingiva.
Transseptal fibers: Horizontally connect adjacent teeth, embedded between cementums.
Dentoperiosteal fibers: Run from cementum over the alveolar crest.
Alveologingival fibers: Extend from the crest of the alveolar process to free gingiva.

Cellular Elements of the Connective Tissue

Fibroblasts: Predominant cells that produce various fiber types and play a key role in wound healing.
Mast cells: Involved in the early phase of inflammation.
Macrophages: Crucial for host defense and repair.
Polymorphonuclear leukocytes (PMNs), lymphocytes, and plasma cells: Contribute to host defense.

Periodontal Ligament (PDL)

Connective tissue that surrounds the root of the tooth and connects it to alveolar bone.
Continuous with connective tissue fibers of gingiva.
Contains numerous gingival plexus anastomoses.

Nerve Supply and Lymphatic Drainage

Follows pathways similar to blood vessels in the periodontium.
Nerve supply derived from branches of the trigeminal nerve, responsible for pain and pressure sensation in periodontal ligaments, alveolar bone, and gingival connective tissue.

Supracrestal Tissue Attachment

Connective tissue attachment occupies 1.07 mm above the crest of the alveolar bone.
Junctional epithelium occupies an additional 0.97 mm above connective tissue attachment.
Total average supracrestal tissue attachment is approximately 2.04 mm, ranging from 0.75 mm to 4.3 mm.

Sharpey's Fibers

Connect cementum to alveolar bone.
Comprised of five principal fiber groups: transseptal, alveolar crest, horizontal, oblique, and apical fibers.

Functions of PDL

Provides physical attachment of tooth (cementum) to alveolar bone.
Absorbs impact from occlusal forces.
Responsible for formation and resorption of cementum and bone.
Performs sensory, nutritive, and metabolic transport functions.

Clinical Features of PDL

Thickness varies from 0.05 mm to 0.25 mm, with a mean of 0.2 mm.
Thickest PDL occurs in the apical region.

Remodeling of PDL

New collagen formation by fibroblasts and resorption of older collagen by fibroclasts.
Bone resorption by osteoclasts when altered forces are applied.

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Description

This quiz explores the cleaning and antimicrobial properties related to gingival connective tissue, specifically the lamina propria. It covers the composition and functions of the connective tissue in the gingiva, emphasizing its protective and supportive roles.