The Periodontium: Alveolar Bone and Process
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The Periodontium: Alveolar Bone and Process

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Questions and Answers

What is the alveolar process composed of?

Alveolar bone proper and other bone types

What is the radiopaque socket-lining layer in the alveolar process known as?

Lamina dura

What is a common misconception about alveolar bone?

It is produced by the bone of the jaw

What is alveolar bone similar to in terms of its origin?

<p>Cementum and the PDL</p> Signup and view all the answers

What is the term for the spongy trabecular region in the alveolar process?

<p>Spongiosa</p> Signup and view all the answers

What is the term for the radiopaque outer layer in the alveolar process?

<p>Cortical region</p> Signup and view all the answers

What is the primary function of the alveolar bone?

<p>To support and anchor the tooth into the jaws</p> Signup and view all the answers

What is the term for the tooth socket?

<p>Alveolus</p> Signup and view all the answers

What is the relationship between the alveolar bone and the tooth during development?

<p>The alveolar bone develops from the tooth, while the tooth develops from the jaw</p> Signup and view all the answers

What can be seen in radiographs of the alveolar bone?

<p>It is more radiopaque than dentine and enamel</p> Signup and view all the answers

What is the distinction between the terms 'alveolar bone' and 'alveolar process'?

<p>Alveolar bone refers to the bone formed by each tooth during development, while alveolar process refers to the bone around the tooth</p> Signup and view all the answers

What are the periodontal tissues that support the tooth?

<p>Cementum, periodontal ligament, and alveolar bone</p> Signup and view all the answers

What is the primary texture of the alveolar bone that gets remodeled into a secondary texture?

<p>Woven bone</p> Signup and view all the answers

What is the result of bone remodeling in the alveolar process?

<p>Turning woven bone into Haversian bone</p> Signup and view all the answers

What is the characteristic of the spongiosa in the alveolar process?

<p>It has a strut-like arrangement of bone tissue</p> Signup and view all the answers

What is the implication of teeth constantly moving and shifting positions within the jaws?

<p>Bone remodeling occurs in the alveolar process</p> Signup and view all the answers

What is the function of bone marrow in the alveolar process?

<p>It fills the space in the spongiosa</p> Signup and view all the answers

What is the outer layer of bone surrounding the teeth?

<p>Compact bone</p> Signup and view all the answers

What is the characteristic of the bundle bone matrix?

<p>It is rapidly changing and disorganized</p> Signup and view all the answers

What is the purpose of osteoclasts in bone remodeling?

<p>To remove primary bone matrix through resorption</p> Signup and view all the answers

What is the result of bone remodeling in the alveolar process?

<p>The transformation of woven bone into Haversian bone</p> Signup and view all the answers

What is the characteristic of the alveolar bone facing the tooth?

<p>It has a rapidly changing and disorganized matrix</p> Signup and view all the answers

What is the term for the process of bone turnover?

<p>Bone remodeling</p> Signup and view all the answers

What is the characteristic of secondary osteons?

<p>They are composed of concentric rings of bone around blood vessels</p> Signup and view all the answers

What is the function of osteocytes in the bone tissue?

<p>To maintain mature bone tissue</p> Signup and view all the answers

What is the purpose of the blood vessels in alveolar bone?

<p>To nourish osteocytes and mature bone tissue</p> Signup and view all the answers

What is the region of alveolar bone where ligament fiber bundles of the PDL are attached?

<p>Socket-lining layer</p> Signup and view all the answers

What is the characteristic of the bundle bone layer?

<p>It is less vascularized than the surrounding bone</p> Signup and view all the answers

Why is cross-polarized light used to visualize Sharpey's fibers?

<p>To see the texture of the tissue invisible under white light</p> Signup and view all the answers

What characterizes the composition of new layers of alveolar bone?

<p>Rapidly deposited, poorly organized collagen matrix</p> Signup and view all the answers

Study Notes

Anatomical Term: Alveolar Process

  • Alveolar process is the bone around teeth, made of alveolar bone proper and other bone types.

Alveolar Bone

  • Alveolar bone is produced by each tooth, not by the bone of the jaw.
  • It is a dental tissue, like cementum and the periodontal ligament (PDL).

Composition of Alveolar Bone

  • Bone remodeling in the alveolar process turns woven bone (primary texture) into Haversian bone (secondary, or remodeled texture).
  • The spongiosa of the alveolar process is made of trabecular bone, with a strut-like arrangement and bone marrow filling the space.
  • The compact bone/compacta, or cortical plates, are the outer walls of bone surrounding the teeth.
  • The bundle bone layer is the site of active attachment of PDL fiber bundles to the alveolar bone, and is rapidly changing due to bone remodeling.
  • The rest of the bone within the alveolar process has a different texture than the bundle bone facing the tooth, due to bone remodeling.

Alveolar Bone Remodeling

  • Bone undergoes a natural turnover process (remodeling), where primary bone matrix is first removed through resorption by osteoclasts, and new bone is laid down around blood vessels in concentric rings (lamellae).
  • This produces secondary osteons (blood vessel space surrounded by circumferential lamellae).

Bone Cells

  • Osteoblasts deposit bone matrix towards the tooth root, but can become entombed in the matrix, where they differentiate into osteocytes.
  • Osteocytes help maintain the mature bone tissue.

Blood Vessels

  • Alveolar bone is perforated by many blood vessels, which leave vascular spaces throughout the bone to nourish the osteocytes and mature bone tissue.

Socket-Lining Layer

  • The socket-lining layer of alveolar bone is often the region where the ligament fiber bundles of the PDL are attached.
  • This layer is called the bundle bone layer, and is less vascularized than the surrounding bone.
  • It is seen as the lamina dura in radiographs.

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Description

Explore the structure and function of the alveolar bone and process, including its developmental origins and histological properties. Learn about the components of the periodontium, including cementum, periodontal ligament, and alveolar bone.

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