JVD 2014, Issue 4 (JW) Flashcards
Nomenclature and Classification of Odontogenic Tumors — Part I: Historical Review
I honestly could not think of any testable questions from this article
n/a
Nomenclature and Classification of Odontogenic Tumors — Part II: Clarification of Specific Nomenclature
What are the two most common odontogenic tumors in dogs?
Canine acanthomatous ameloblastoma
Peripheral odontogenic fibroma
Nomenclature and Classification of Odontogenic Tumors — Part II: Clarification of Specific Nomenclature
What does “acanthomatous” refer to?
Refers to prickle cells that resemble those of the epidermal stratum spinosum
Nomenclature and Classification of Odontogenic Tumors — Part II: Clarification of Specific Nomenclature
What is focal fibrous hyperplasia
It is an over-exuberant repair of fibrous connective tissue secondary to chronic gingival trauma or irritation
Nomenclature and Classification of Odontogenic Tumors — Part II: Clarification of Specific Nomenclature
What are the distinctive features of POFs?
Finely fibrillar, vascular stroma, with stellate fibroblasts resembling the periodontal ligament
Do not arise within and very rarely involve the periodontal ligament space
Nomenclature and Classification of Odontogenic Tumors — Part II: Clarification of Specific Nomenclature
What is pyogenic granuloma?
Reactive lesion of the gingiva or mucosa characterized by exuberant connective tissue proliferation in response to injury
Nomenclature and Classification of Odontogenic Tumors — Part II: Clarification of Specific Nomenclature
What is the histology like for feline inductive odontogenic tumors?
Spherical condensations of fibroblasts, resembling dental papilla, within the connective tissue stroma
Nomenclature and Classification of Odontogenic Tumors — Part II: Clarification of Specific Nomenclature
What is one of the few types of malignant odontogenic tumors described in dogs?
Ameloblastic carcinomas
Ocular Trauma Originating from within the Oral Cavity: Clinical Relevance and Histologic Findings in 10 Cases (2003–2013)
What comprises the orbital floor?
Medial pterygoid muscle
Zygomatic salivary gland
Soft palate
Ocular Trauma Originating from within the Oral Cavity: Clinical Relevance and Histologic Findings in 10 Cases (2003–2013)
What are characteristics of penetrating ocular injuries from the oral cavity?
Perforation at the 6 o’clock meridian at or posterior to the equator of the globe
Suppurative inflammation
Episcleral fibrosis on the ventral aspect of the globe
Inflammation of the orbital tissues
+/- Lens capsule rupture
Presence of bacteria
Ocular Trauma Originating from within the Oral Cavity: Clinical Relevance and Histologic Findings in 10 Cases (2003–2013)
How many cases discussed in this article had a history of tooth extraction(s)?
8 of 10 cases presented
Ocular Trauma Originating from within the Oral Cavity: Clinical Relevance and Histologic Findings in 10 Cases (2003–2013)
How long after dental procedure did dogs and cats present to veterinary ophthalmologist?
Between 3 days and 6 weeks (mean = 17.4 days, median 10-days)
Ocular Trauma Originating from within the Oral Cavity: Clinical Relevance and Histologic Findings in 10 Cases (2003–2013)
What treatment was performed by the ophthalmologist on call cases?
All underwent enucleation
Ocular Trauma Originating from within the Oral Cavity: Clinical Relevance and Histologic Findings in 10 Cases (2003–2013)
What appears to be a risk factor for traumatic injury to the globe?
Small size dog breeds (because of large, “misplaced” teeth in relatively thin bone)
Ocular Trauma Originating from within the Oral Cavity: Clinical Relevance and Histologic Findings in 10 Cases (2003–2013)
What are immediate treatments for globe penetration?
Broad-spectrum abx, anti-inflammatory, E-collar, +/- tarsorrhaphy
(poor prognosis)
Modified Conservative Treatment of an Extensive Dentigerous Cyst in a Dog
What is the difference between impacted and embedded teeth?
Impacted = physical barrier that hinders eruption Embedded = lack eruptive forces
Modified Conservative Treatment of an Extensive Dentigerous Cyst in a Dog
Which teeth are most often associated with dentigerous cysts?
Mandibular first premolar teeth
Modified Conservative Treatment of an Extensive Dentigerous Cyst in a Dog
Which breeds are statistically over-represented for dentigerous cysts?
Brachycephalics
Papillions
Modified Conservative Treatment of an Extensive Dentigerous Cyst in a Dog
What causes a dentigerous cyst to form?
Originate from a proliferation of the remaining enamel organ or reduced enamel epithelium that surrounds the crown during odontogenesis
Modified Conservative Treatment of an Extensive Dentigerous Cyst in a Dog
What causes dentigerous cyst expansion to occur?
Passive fluid accumulation
Epithelial cell proliferation
Release of osteoclastic mediators to aid in bone resorption
Modified Conservative Treatment of an Extensive Dentigerous Cyst in a Dog
What are the cysts like histologically?
Lined by non-keratinized, stratified squamous epithelium that is 4-6 cell layers thick
Treatment and Stabilization of Beak Symphyseal Separation Using Interfragmentary Wiring and Provisional Bis-Acryl Composite
What determines if a beak injury will heal or not?
Intact vascular supply to the beak
Keratinized covering
Treatment and Stabilization of Beak Symphyseal Separation Using Interfragmentary Wiring and Provisional Bis-Acryl Composite
What is the name of the keratinized covering of the maxilla and mandible of a bird?
Rhamphotheca
Treatment and Stabilization of Beak Symphyseal Separation Using Interfragmentary Wiring and Provisional Bis-Acryl Composite
What is the name of the maxillary keratinized covering in a bird? Mandibular?
Maxillary = Rhinothecia Mandibular = Gnathotheca
Treatment and Stabilization of Beak Symphyseal Separation Using Interfragmentary Wiring and Provisional Bis-Acryl Composite
What is the name of the bony symphysis in birds?
The dentary
Use of Composite Restoration Materials
What % of dogs and cats present for veterinary care have fractured teeth?
27% of dogs
10% of cats
Use of Composite Restoration Materials
What does polishing material need to NOT include in order to allow chemical curing of composite to occur (2 things)?
Glycerin
Fluoride
Use of Composite Restoration Materials
What is the most important rule of restorative dentistry?
Preservation of natural tooth structure
Use of Composite Restoration Materials
For which classes of restorations should you bevel the cavosurface margins?
Should in class III-VI (better retention) Should not for I or II (because enlarges the surface area of the restoration)
Use of Composite Restoration Materials
How does acid etch improve bond strength?
- Dentin is demineralized, exposing connective tissue for bonding
- Collagen fibers within dentinal tubules are opened, exposing more micropores for infiltration by the resin
- Removes “smear layer”
Use of Composite Restoration Materials
What is the most commonly used acid etchant?
Phosphoric acid (10-38% gel or solution on dentin; 35-38% gel on enamel)
Use of Composite Restoration Materials
For how long should acid etch be applied?
20 seconds on enamel
10-15 seconds on dentin
Use of Composite Restoration Materials
Why is prolonged drying after acid etching bad?
Decreases bonding strength because it flattens out collagen fibers, which decreases the surface area for bonding.
Use of Composite Restoration Materials
How long does bonding agent last?
3-12 months
Use of Composite Restoration Materials
How deep do bonding agents penetrate?
200-400 microns into dentin
Use of Composite Restoration Materials
How did first and second generation bonding agents work?
Dentin was not etched, and so bonding strength was based on bonding to the smear layer
Use of Composite Restoration Materials
How did third generation bonding agents work?
Separate primer and adhesive; used acid etchant; only partial removal of smear layer
Use of Composite Restoration Materials
What are fourth generation bonding agents?
Remove the smear layer completely and create hybrid layer (= forms from polymerized methacrylate and dentin
Use of Composite Restoration Materials
What are fifth generation bonding agents like?
One-bottle system that combines primer and adhesive into one solution, to be applied after total etch technique
Use of Composite Restoration Materials
What is special about 6th and 7th generation bonding agents?
One-step - no need to acid etch or rinse first
Bonding occurs by incorporating the agent into the existing smear layer
Use of Composite Restoration Materials
What are the disadvantages of 6th and 7th generation bonding agents?
Must continually be reapplied to refresh the exposed surface
Do not etch enamel well
Bond strength is lower than 5th generation
Use of Composite Restoration Materials
Do you need retention features with composite resins?
No, because they have a strong bonding strength
Use of Composite Restoration Materials
How can composite polymerization take place?
Via either chemical-cure, light-cure, or dual-cure
Use of Composite Restoration Materials
What wavelength of light polymerizes/cures composite?
460-480 nm
Use of Composite Restoration Materials
Which types of composite have the best durability and strength?
Macrofill and intermediate fill (refers to size of particles)
Use of Composite Restoration Materials
What are the advantages of hybrid composite?
Combine micro- and intermediate-sized particles for good strength, durability, and esthetics
step-by-step: Total Mandibulectomy in the Dog
What % of oral tumors in the dog are malignant
6%
I don’t think this is really true, but I swear the article says this
step-by-step: Total Mandibulectomy in the Dog
Which muscle is elevated from the lingual aspect of the mandible, to access the inferior alveolar pedicle?
Genioglossal muscle
step-by-step: Total Mandibulectomy in the Dog
Which muscles need to be dissected/transected during total mandibulectomy?
Genioglossal Mylohyoid Digastricus Medial pterygoid Masseter Lateral pterygoid Temporal muscle