Periodontum Flashcards
What does the periodontium consist of
The periodontal ligament
Alveolar bone
Gingiva (junctionsk epithelia)
What else is sometimes considered as periodontium
Cementum
What is the periodontal ligament
Dense fibrous connective tissue
Where is the PDL found
Space between tooth and alveolar bone
What does the PDL contain
Cells Fibres ( collagen) Water Nerves Ground substance Blood vessels
What are the functions of the PDL
Attachment of tooth to the bone Support Suspensory Shock absorber Sensory - heavily innervated
What are the two parts of bone associated
Alveolar bone and basal bone
What is the alveolus
Sac or little cavity
When’s. Tooth is extracted what happens to the alveolar bone
It’s resorbs
Where about is cortical a nd trabecular bone found around the tooth
Cortical the outskirts of the bone
Trabecular under the tooth ehich is spongey cancellous bone
What is the lamina dura
Bundle bone
Crubiform late at the cortical bone and PDL
What is gingiva
A type of oral mucosa
What is the function of oral mucosa
Protection - mechanical, chemical, bacterial, prevent dehydration
Sensation as heavily innervated
Secretion
What does oral mucosa consist of
Epithelium Connective tissue (lamina propria)
What are the 3 types of mucosa
Masticatory
Lining
Specialised - sensation of taste
Where is masticatory mucosa found
Roof of mouth
In front and Behind teeth
Where is lining mucosa found
Inside lips
Cheeks
Under tongue
Where is specialised mucosa found
In the tongue
What is gingival mucosa
Masticatory mucosa The pick keratinised epithelia Pink Firm Stippled
What is alveolar mucosa
Lining mucosa Thin non-keratinised epithelia Red Loose Smooth
What he the margin called between the mucosal and alveolar mucosa
Mucogingival junction
What is the distinct curvature of mucosa found around the teeth
Free gingival groove
Why does a local anaesthetic given in lining mucosa is pain free but hurts in masticatory mucosa
Lining mucosa - is flexible
Masticatory. - is firm and pressure increased can hurt
Explain some features of the dento-gingival junction
Gingival sulcus
Junctionsk epithelia
Fre gingiva
What is periodontium
The tooth support tissues
