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It’s the last oralhistology lecture!
Please say itisn’t so…
March 7, 2008 Repair & Regeneration of Oral Tissues
What do African termites use to “glue” their mounds together?
CATEGORY: 5th grade biology & nature
QuickTime™ and aTIFF (Uncompressed) decompressor
are needed to see this picture.
Macrotermes bellicosus
A. Cementum
B. Moss
C. Saliva
D. Feces
E. Elmer’s glue
The structure is built primarily with a combination of saliva and fine-grained soil particles (coarse sand is not appropriate).
Partitions within the structure are made from carton - a combination of saliva and fecal pellets
Fungal gardens grow on this material (spores having been collected from the outside world).
The large mounds of Macrotermes usually have tall columns which serve as air vents to regulate the inside temperature.
Saliva
QuickTime™ and aTIFF (Uncompressed) decompressor
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Repair & Regeneration of Oral Tissues
I. Wound Healing in Oral Mucosa
II. Reparative Phase
III. Repair of Periodontium
IV. Repair of the Tooth
Repair & Regeneration of Oral Tissues
Examples of Cellular Adaptation:
a) Cellular swelling (hepatitis)
Repair & Regeneration of Oral Tissues
Examples of Cellular Adaptation:
a) Cellular swelling (hepatitis)
Repair & Regeneration of Oral Tissues
Examples of Cellular Adaptation:
b) Storage of offending substance (foreign body
reaction)
Repair & Regeneration of Oral Tissues
Examples of Cellular Adaptation:
c) Hypertrophy vs Hyperplasia
Cardiac Hypertrophy: increased thickness of heart wall
Repair & Regeneration of Oral Tissues
Examples of Cellular Adaptation:
c) Hypertrophy vs Hyperplasia
Gingival Hyperplasia: overgrowth of gingiva (dilantin)
Repair & Regeneration of Oral Tissues
Examples of Cellular Adaptation:
d) Metaplasia (respiratory tract mucosa)
Repair & Regeneration of Oral Tissues
Examples of Cellular Adaptation:
e) Atrophy (dentate vs edentulous)
Repair & Regeneration of Oral Tissues
I. Wound Healing in Oral Mucosa
Utilizes same principles as skin
BUT scar tissue does not form to same degree
What does this difference mean to you as dentists and dental hygienists?
Repair & Regeneration of Oral Tissues
I. Wound Healing in Oral Mucosa
What are some characteristics of scars in skin?
http://www.emedicine.com/plastic/topic411.htm
Color, Lack of hair/sweat appendages, Firm consistency, etc.
Repair & Regeneration of Oral Tissues
I. Wound Healing in Oral Mucosa
What are some characteristics of scars in skin?
Color, Lack of hair/sweat appendages, Firm consistency, etc.
Repair & Regeneration of Oral Tissues
I. Wound Healing in Oral Mucosa
Type of wound influences healing
http://surgclerk.med.utoronto.ca/WoundHeal/cases.htm
This 75 year old female was attacked by a dog.
Repair & Regeneration of Oral Tissues
www.sharkattackphotos.com/
Great White shark attack photo gallery - an attack in Aldinga Beach Australia. Victim required 462 stiches.
Repair & Regeneration of Oral Tissues
I. Wound Healing in Oral Mucosa
A. Healing by primary intention: clean, incised wound, able to approximate edges
B. Healing by secondary intention: large wound, unable to approximate edges
C. Healing by tertiary intention: infected wound
Repair & Regeneration of Oral Tissues
I. Wound Healing in Oral Mucosa
http://solutions.3m.com/wps/portal/3M/en_GB/skin-care/wound-resource-centre
Repair & Regeneration of Oral Tissues
I. Wound Healing in Oral Mucosa
http://solutions.3m.com/wps/portal/3M/en_GB/skin-care/wound-resource-centre
Repair & Regeneration of Oral Tissues
I. Wound Healing in Oral Mucosa
http://www.emedicine.com/asp/image
Surgical closure of wound with tissue flap
Repair & Regeneration of Oral Tissues
II. Reparative Phase
What is a keloid?
QuickTime™ and aTIFF (Uncompressed) decompressor
are needed to see this picture.
QuickTime™ and aTIFF (Uncompressed) decompressor
are needed to see this picture.
Repair & Regeneration of Oral Tissues
II. Reparative Phase
What is a keloid?
Beware of nonessential surgery.
Keloid: “A scar that doesn't know when to stop.”
Keloids are an overgrowth of scar tissue at the site of a healed skin injury.
Repair & Regeneration of Oral Tissues
III. Repair of Periodontium Can teeth be reimplanted and remain vital? What are some potential complications?
Ankylosis = fusion of tooth to bone
Pulpal death = abscess, granuloma, cyst
95
Dead Tracts
IV. Repair of The Tooth
Reparative (tertiary) dentin
Repair & Regeneration of Oral Tissues