Periodontal Ligament Quiz PDF
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This document contains a quiz and table about the periodontal ligament, with questions about fibers, vascularization, and functions. It also describes the formative and resorptive functions of the ligament, including cell types involved.
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Periodontal Ligament quiz Dental implants have which of the following fibres? A. Alveologingival fibers and circular B. Circular group C. Principle fibres D. All of the above ANSWER: A The periodontal ligament is vascularized laterally via fenestrations in the alveolar bone. Apically, the...
Periodontal Ligament quiz Dental implants have which of the following fibres? A. Alveologingival fibers and circular B. Circular group C. Principle fibres D. All of the above ANSWER: A The periodontal ligament is vascularized laterally via fenestrations in the alveolar bone. Apically, the gingival vascular supplies PDL. A. True/True B. False/True C. False/false D. True/false The periodontal ligament has multiple functions and is surrounded by scaffolding fibres. Complete the following table: +-------------+-------------+-------------+-------------+-------------+ | **Fibre** | **Location* | **Origin** | **Insertion | **Role** | | | * | | ** | | +=============+=============+=============+=============+=============+ | Alveolar | Beneath JE | Cementum, | Runs | Prevents | | crest | | below CEJ | downwards & | extrusion | | | | | outwards & | of tooth | | | | | inserts | from socket | | | | | into | and resists | | | | | alveolar | lateral, | | | | | crest | tilting & | | | | | | intrusive | | | | | | tooth | | | | | | displacemen | | | | | | t | +-------------+-------------+-------------+-------------+-------------+ | Inter-radic | Found in | Cementum | Inter-radic | Resists | | ular | multi | | ular | vertical & | | fibres | rooted | | septum | lateral | | | teeth | | | movement | | | | | | | | | | | | Tipping, | | | | | | torquing & | | | | | | luxation | | | | | | are also | | | | | | resisted | | | | | | | | | | | | Periodontal | | | | | | disease -- | | | | | | total loss | | | | | | of fibres | +-------------+-------------+-------------+-------------+-------------+ Explain the formative and resorptive function of the periodontal ligament. The width of periodontal ligament must be maintained. Therefore it needs to be formative & resorptive. Formative -- contains cell builders, cementoblasts and osteoblasts Resorption of hard tissues of periodontium -- repair bone & cementum, degrade old cells, maintain width of PDL space. The periodontal ligament is rich in various types of cells. Provide two examples of resorptive cells in the periodontal ligament Osteoclasts Fibroblasts Cementoclasts A Gingiva B Cementum C Periodontal Ligament D Alveolar bone
