Lecture 3 Flashcards
What are the cellular elements of the PDL?
Connective tissue-Fibroblasts, cementoblasts and cementoclasts, osteoblasts and osteoclasts
Epithelial tissue-Rest cells of Malaise (these can causes abscesses if stimulated to grow)
Defense cells-Mast cells and macrophages
Neurovascular elements
Which is more resistant to resorption, bone or cementum?
Cementum, this is important in orthodontics because you can move teeth without destroying the roots.
What characterizes primary and secondary cementum?
Acellular and cellular respectively
Name the three types of CE junctions?
Cementum overlays enamel (60-65%)
Cementum doesn’t meet enamel (5-10%)
Cementum meets enamel at butt joint (30%)
On what is the existence of alveolar bone is dependent?
Teeth, if you don’t have teeth the alveolar bone resorbs.
What types of bone are in the jaw?
Cortical bone, hard dense bone surrounding the outside of the jaw.
Cancellous bone, trabecular bone the makes up the middle portion of the jaw
Alveolar bone proper, or the cribiform plate (lamina dura on a radiograph)
There is also a periosteum
What is the alveolus?
It is the boney socket that houses the roots of the teeth
Where is the cortical bone the thinnest?
In the incisors, canine and premolar area and it is the thickest in the molar area
What are the three sources of vascular supply?
Apical vesses, penetrate through the alveolar bone, anastomosis from the gingiva
What does iatrogenic mean?
Cause by the dentist
What can cause pigmentation of the gingiva?
There are many known mechanisms from genetic to syndromes and environmental reasons
What is the only way to know what is the cause of the pigmentations?
Biopsy
Where are melanocytes located?
In the stratum basale and spinosum
Does grafted tissue stay pigmented?
No, the tissue is determined by the underlying connective tissue
What makes up periodontal disease?
Gingivitis, periodontitis and some other causes
