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Dental Histology

Chapter 14 Periodontium

QuestionAnswer
Periodontium is made up of? Cementum, alveolar bones, and periodontal ligament.
What is the function of the periodontium? support soft and hard tissues between the alveolar bone and tooth.
Where does the cementum develop from? The dental sac.
When does the cementum from? after Henrtwigs epithelial root sheath disintegrates
What cells make up the cementum? Cementoblasts
What do the cementoblasts lay down? cementoid.
What is dentinal hypersensitivity? When the cementum does cover the entire portion of dentin and leaves a little exposed.
How does cementum repair work? Cementum is deposited and resorbed in increments creating incremental lines, resulting in a protective mechanism for the root.
What is acellular (primary) cementum? Consists of the first layers of cementum deposited at the DCJ, at least one layer all over the root.
What is acellular (primary) cementum? Consists of the first layers of cementum deposited at the DCJ, at least one layer all over the root.
What is cellular (secondary) cementum? The last layer of cementum deposited over the acellular cementum, covered the apical one third of the root.
How does cementum repair work? Cementum is deposited and resorbed in increments creating incremental lines, resulting in a protective mechanism for the root.
What is acellular (primary) cementum? Consists of the first layers of cementum deposited at the DCJ, at least one layer all over the root.
What is cellular (secondary) cementum? The last layer of cementum deposited over the acellular cementum, covered the apical one third of the root.
Important function of cellular cementum? Layers are added during the life of the tooth.
Clinical Considerations of Cementum. Gingival Recession, cemental caries, cementicles, cemental spurs, hypercementosis.
Basal Bone bone that is apical to the roots and forms the body of the maxilla and mandible.
Function of the alveolar bone Develops initially as a protection to the developing tooth. Supports the developing root.
What is fenestration? area of bone loss where an apical root penetrates the cortical bone.
What is dehiscence? Bone loss in the coronal area of the root?
What is the alveolar crest? Most cervical rim of the alveolar bone proper
What is the alveolar bone proper? The lining of the alveolus with compact bone.
What is the periodontal ligament? (PDL) Fibrous connective tissue between the alveolar bone proper and the cementum covering the root.
Where does the periodontal ligament develop from? Dental sac.
What is the function of the periodontal ligament? Support the teeth during mastication, sense pain pressure and temperature, provides nutrition for the cels.
What makes up the PDL? Intersitial spaces, blood vessels, nerves, cells
What 6 cells make up the PDL? Fibroblasts, osteoblasts, cemtoblasts, macrophages, osteoclasts, and epithelial rests of Malassez.
What are the principle fibers of the PDL? Gingival fiber group, circular ligament, dentogingival ligament, alveologingival ligament, and dentoperiosteal ligament.
What are the alevolodental fibers of the PDL? Alveolar crest group, horizontal group, oblique group, apical group, intteradicular group.
Created by: Strobelight95