Midterm Flashcards
What are dental caries?
pathologic process and destruction of hard tooth structure by bacterial microorganisms
Progresses from enamel inward
What is periodontal disease?
Pathologic process of destruction of structures that surround and support the teeth
What is the hygienist role in prevention as well as process of care?
Assessment Diagnose Plan Implement Evaluate
What is the primary level of prevention?
prevent onset, reverse, or arrest disease progression
Known as DH
What is the secondary level of prevention?
Use routine treatment to terminate a disease and restore tissue
Known as restorative care
What is the tertiary level of prevention?
Replace lost tissues and rehabilitate to as near to normal as possible
Known as reconstructive care
What is culture?
pattern of human behavior including language, thoughts, communications beliefs etc of racial, ethnic, religious groups
What happens if hcp understand cultural competence?
Improved health outcomes
What is dental public health?
concerned w/ education of public, research application and admin of public health programs
What are community programs that try and prevent disease?
Promoting education and prevention Increase coverage of access Enhance dental workforce Increase finance and reimbursement Improving quality of data and surveillance
What is an acquired pellicle?
Acellular and organic
Consists of glycoproteins from saliva
Reforms immediately
What does the acquired pellicle do?
Protects, lubricate, area for bacteria and calculus to attach to
What is dental plaque?
Naturally acquired, multi-spieces biofilm,
Can accumulate everywhere
What factors affect how dental plaque is formed?
Diet, age, salivary flow, OH, tooth alignment
How is dental plaque formed?
bacteria from everywhere
What is materia alba?
whitish material, clearly visible, loosly headhunter mass of bacteria and cellular debris
What is the stage of formation for dental biofilm?
Formation of pellicle
Bacterial multiplication and colonization
Biofilm growth and maturation
Matrix formation
What is pellicle formation?
immediately
attraction to certain bacteria
What is bacterial multiplication?
Form in layers, mass continuously grows
What happens in the first few hours on bacterial multiplication?
Gram + and cocci rods come in
What happens in the first 2 days of bacterial multiplication?
Double in size
What happens in the 4-5 day of bacterial multiplication
Most dramatic change
What happens at day 21 of bacterial multiplication?
Bacterial replication slows
Initial layers aerobic
Deeper down anaerobic
What is the composition of dental plaque?
Inorganic elements, Organic components (carbs and proteins)
What is the development of dental caries?
Cariogenic food, dental biofilm, acid formation, demineralization, dental caries
What is a primary colonizer in dental plaque?
Gram +
Primarily harmless
What is a secondary colonizer in dental plaque?
Arrive later
Gram + and -
Can cause caries and periodontal disease
What are the 4 types of carious lesions?
Pit and fissure
Smooth Surface
Root Surface
Secondary/recurrent
What are 4 zones of incipient carious lesions?
Demineralization toward dentoenamel junction to pulp
Over/frank lesions characterized by actual cavitation
Rampant decay
Which bacteria is present in the highest number during the caries process?
Mutans streptococcus
How long does it take to neutralize liquid sugars?
20 min
How long does it take to neutralize solid/sticky sugars?
40 min
What pH does a root caries occur at?
6.0
What is the importance of Ca and P ions?
When tooth demineralizes these do and are needed when it remineralizes
What is the primary site of calculus?
teeth, implants, dentures and other appliances
What does is subgingival calculus like?
Brittle flint like
harder and denser than supra
Brown or black
How long does it initially take for calculus to form?
12 hours
How long does it take calculus to mineralize?
3-20 depending upon the person
Where does calculus attach to?
Acquire pellice (not common) Minute irregularties in tooth surface Direct contact (tooth surface, most common)
How mineralized is calclulus for supra and sub?
30% for supra
60% for sub
What is the significance of radiographs?
Calculus shows up white,
Road map
Interproximally
What are the 4 defense mechanisms operational in oral cavity?
Anatomic barrier
Normal oral flora
Immune system
Saliva
What is cellular immunity?
B-cells
Bone marrow
What is humoral immunity
T Cells
Thymus
What do cellular and humoral immunity do?
Defend body against bacteria and viruses
What immunoglobulin is important to dentristy
IgA
What do granulocytes do as a defense?
Find and attack foreign invaders
What teeth do the PHP measure?
3,8,14,19,24,30
How do you classify stain by location?
Extrinsic
Intrinsic
How do you classify stain by source?
Exogenous
Endogenous
Exogenous
Extrinsic (stay on surface)
Intrinsic (becomes incorporated w/ tooth)
Endogenous
Always intrinsic
Usually dentin showing through
What is enamel hypoplasia?
enamel disturbance during development, ameloblastic disturbance
What is amelogenesis imperfecta?
Without enamel
Dentinogenesis imperfecta?
Opalescent
When was the first TB invented?
618-907 by Tang Dynasty
What types of bristles are there?
Nylon (preferred)
Natural (gross)
What are tufts?
How the bristles are grouped
What is bass method?
45 degree at sulcus, horizontal vib jiggle
Good for everyone
What is the stillman method?
45 degree to apex
Bristles 1/2 on gingival 1/2 on tooth
Jiggle motion
Good for gingival recession
What is charter’s
45 degree to occlusal/incisal plane
Circular vib motions from gingival margin onto tooth
Orthodontics
What is horizontal methods?
90 degrees to tooth
Short horizontal strokes
Not recommended
Fones Method
90 degrees to tooth
Large circles over teeth and gingiva
Recommended for children
Leonards Method
90 degrees to tooth
Vertical strokes
Not recommended
Roll Stroke Method
Bristles places apically or parallel
Place, press, vibrate and roll
Recommended for children who can’t master bass/fones
Smith method
Occlusal surface
Move back and forth
Not recommnded
How often should you change your brush?
every 3-4 months
What are interdental brushes used for?
Braces
2+3 embrasures
Under bridges
What does a rubber tip stimulator do?
stimulate gingiva