Head and Neck Surgery Flashcards
Mesial
Toward the midline of the dental arch- central incisor (rostral)
Distal
away from the midline (caudal)
Proximal
(contact) surface facing adjoining teeth
Interproximal
between proximal surfaces of adjoining teeth
Diastema
wider space between teeth
Rostral/caudal
structures on head (not the teeth)
Occlusal
chewing surfaces of molars
Apical
toward the root or away from the crown
Coronal
toward the crown
Gingiva
the only visible part of the periodontium in a normal mouth
What makes up the Periodotium?
Gingiva
Periodontal ligament
Cementum
Alveolar bone
Gingiva sulcus
potential space between tooth and gingiva
Junctional epithelium
at the base of the gingival sulcus
Pulp cavity
Pulp chamber + root canal
What is a transitional tooth?
a tooth that the front half comes in contact with the premolar and the back half is in contact with the upper molar
How many roots does the Canine molar have?
3
How many roots does the canine premolar have?
2
How many roots does the canine incisor have?
1
How many roots does the canine canine tooth have?
1
How many roots does the feline canine tooth have?
1
How many roots does the feline incisor have?
1
How many roots does the feline premolar have?
2
What are the periodontal ligament functions?
Attaches tooth to the alveolus
Absorbs shock from the impact of occlusal forces and transmits them of the alveolar bone
Supplies nutrients to alveolar bone and cementum via arterioles and drainage via venules and lymphatics
Provides tactile and proprioceptive information for coordination of mastication
What happens if the periodontal ligament ossifies?
osteoclasts can invade the tooth and remodel it into brittle bone rather than a flexible tooth full of dentinal tubules, this causes the roots to essentially disappear and the crown to break off since the tooth doesn’t flex when it chews on something solid
Cingulum
The shelf on the palatal surface of the maxillary incisors where the mandibular incisors occlude or “rest”
What is the “mass” behind the incisors?
Incisive Papilla overlies the Vomeronasal Organ
What is located on each side of the Incisive Papilla?
Incisive Ducts
What is important about the Parotid Salivary Gland Papilla?
located about the 4th premolar and releases mineral rich saliva and makes tartar accumulate more quickly on this tooth than other teeth
What kind of fracture is very common in premolars?
Slab fractures
What creates Dentin?
Odontoblasts
What forms the enamel?
Ameloblasts
What forms the cementum?
formed by remanants of the dental sac on the outer dentinal surface of the root when the tooth is almost mature
Produced throughout life by cementoblasts
How many deciduous teeth does a dog have?
28
How many Adult teeth does a dog have?
42
How many deciduous teeth does a cat have?
26
How many adult teeth does a cat have?
30
What number does the Canine tooth have in the Triadan system?
04
What number does the 1st Molar have in the Triadan system?
09
Retained Deciduous Teeth?
Caused by failure of the primary tooth’s root to undergo resorption
What teeth are commonly affected with Retained Deciduous teeth?
Canine
Incisors
Base Narrow Canines
Retained deciduous canine teeth that cause the canine adult teeth to not flair out like they normally would and cause trauma to the hard palate
What causes Base Narrow Canines?
retained deciduous canines
Interceptive orthodontics
intentionally creating space for the tooth to come in to
Polydontia
Supernumerary Teeth
Where are supernumerary teeth most commonly seen?
Maxilla
What teeth are commonly supernumerary?
Incisors
Premolars
What is the problem with supernumerary teeth?
interfere with normal occlusion
cause overcrowding, malposition, malocclusion, or incomplete eruption of adjacent teeth
Fusion
joining of two teeth
one crown and two roots with one or two root canals
Germination
incomplete splitting into two teeth
Andontia/Oligodontia/Hypodontia
missing teeth
What is the rule of thumb for Andontia/Oligodontia/Hypodontia?
If deciduous tooth is congenitally absent, the adult tooth will also be missing
Malocclusion Class 1
Malpositioned teeth, jaw, length normal
Anterior/posterior cross-bite
Base narrow canines
Malocclusion Class 2
Mandibular Brachygnathism
Parrot Mouth
Overshot
Malocclusion Class 3
Mandibular Prognathism
Undershot
Anterior cross bite
One or more of the maxillary incisors are displaced toward the palate
Posterior cross bite
Maxillary premolars are lingual to mandibular premolars or molars
What is the treatment for Class 2 Malocclusions?
Extraction
Reduce the height of the crown so it does not impact the gum
Level Bite
Incisor crown meet causing a type of prognathism
Attrition
Pathologic abnormal wear on incisors commonly repaired by tertiary dentin
Wry Mouth
Unequal arch development due to trauma or inherited
Treatment of Malocculsions
Interceptibe orthodontics Exodontics Crown reduction Orthodontic Appliances Incline Planes
What does an incline plane treat?
Base Narrow Canines
What is the complications with an Incline Plane?
Mucositis
What causes impacted teeth?
lack of space in the dental arch or mal-alignment of the tooth bud
What causes impacted teeth?
Traumatic insult or extraction
What is a result of Impacted teeth?
Abscess or cyst formation
What is the treatment for impacted teeth?
extraction
What can cause Enamel Hypoplasia/Hypocalcification?
High fevers Distemper Periapical inflammation trauma of the permanent tooth bud endocrine dysfunction early in life
How do you treat Enamel Hypoplasia/Hypocalcification?
Focal-restore defect with composite Several teeth cap to prevent wear Extraction Crown
What is the pathophysiology of Enamel Hypoplasia/Hypocalcification?
Damage to ameloblasts during enamel development or exposure of enamel to corrosive material
Tetracycline Staining
Tetracycline given when teeth are developing will stain them yellow
What layer is affected with Tetracycline?
Dentin
What is the treatment for Tetracycline staining?
None
How do you avoid Tetracycline staining?
Use Doxycycline
What is the treatment for Attrition?
Orthodontic correction
Crown reduction
Extraction
Abrasion
Caused by abnormal contact with crown surface by foreign object
What is the treatment for Abrasion?
Remove offending objects
Monitor for pulp exposure and crown fractures
How does Dental Caries appear?
Brownish color
Soft leathery consistency
What is the treatment for Dental Caries?
Indirect or direct pulp capping
Root canal
Extraction
What are the clinical signs for Periapical infection?
Nasal disease Maxillary/mandibular abscesses Intraoral fistula Retrobulbar disease Pathologic fracture
Parulis
Draining tract associated with the teeth
What is the etiology of Gingival Hyperplasia?
Focal-due to periodontal disease
Generalized- in boxers
drugs
What drugs cause Gingival Hyperplasia?
Cyclosporine
Calcium channel blockers
Anticonvulsants
What is the treatment for Gingival Hyperplasia?
Remove excessive tissue to return sulcus depth to normal
What is the treatment for Gingival Hyperplasia?
try to recreate normal scalloped contour
Surgery
What is the post op care for surgery for Gingival Hyperplasia?
Analgesics
decaffenated tea
Chlorhexidine
Oral rinses
Pulpitis
Inflammation of the Pulp Cavity
What is the treatment for Pulpitis?
Monitor
Root Canal
Extraction
Enamel infarction (Abraction)
Cracks in the enamel
No loss of structure
Enamel Fracture
Loss of enamel only
Tooth fracture Classification
Complicated crown fracture
Uncomplicated crown/root fracture
Complicated Crown/root fracture
Root Fracture
Complicated crown fracture
Pulp cavity is exposed
Uncomplicated crown/root fracture
Pulp not exposed
Complicated crown/root fracture
Pulp exposed
How do you treat Root Fracture?
Extraction
How do you treat Enamel fracture, Uncomplicated fracture in teeth?
+/- indirect pulp capping
Crown restoration
How do you treat Complicated Fractures in teeth?
Vital pulpotomy
root canal
Crown restoration
Extract tooth
What are the indications for Endodontics?
Fractured teeth
Pulpitis
Tooth luxation/avulsion
Crown reduction
What are the advantages of Endodontics?
Less invasive than extraction
Preserves tooth function and integrity of jaw
more fun to do than extractions
What are the disadvantages of Endodontics?
Expense
Longer anesthetic time
Special instruments and training
What is the goal for Vital Pulpotomy?
to maintain a viable tooth that will continue to mature
When would you perform a Vital Pulpotomy?
Immature tooth
Very wide pulp cavity
Apex not completely closed