Periodontal Tissues Flashcards
What sit he PDL
Dense fibrous ct
Occupies periodontal space between tooth and alv bone
What does the PDL contain
Cells Fibres collagen Water Nerves Blood vessels Ground substance
What are the functions of the PDL
Attachment tooth- bone
Support - shock abs, suspensory
Sensory as heavily innervated
What si the alveolar bone
Where tooth sits called alveolus
Beneath alveolus is the basal bone
What happens to the alveolar bone if s tooth extracted
It resorbs
What are the two types of bone assocites with the alveolar bone
Corticol and trabecular ( spongy)
Why is it imp to know about cortical and trabecular bone
Local anaesthesia can diffuse easier through trabecular as cancellous and has pores whilst cortical thicker and harder to diffuse
What si the lamina dura
Bundle bone
Crubiform plate
What si the gingiva
Type of oral mucosa
What are the functions of the oral mucosa
Mechanical bacteria and chem protection Prevent desiccation Sensation as heavily inv Secretion Thermal reg
What does the oral mucosa consist of
Epi
Connective tissue lamina propria
What are the 3 types of mucosa
Masticatory
Lining
Specialised mucosa - gustatory mucosa
What sit he gingival mucosa
Masticatory Mucosae Thick epi Keratinised Pink Firm Stippled
What is the alveolar mucosa
Lining mucosa Thin epi Non keratinised Red Loose Smooth
Where is the mucogingival junction
Between alveolar mucosa and attached gingivae
