Test 2 Flashcards
___ ___: forces of occlusion that exceed the adaptive capacity of the periodontium
Occlusal Trauma
4 variables of occlusion that contribute to perio disease
- direction of force
- magnitude
- duration
- frequency
3 parts of the periodontium affected by occlusal trauma
- cementum
- PDL
- alveolar bone proper
7 clinical symptoms of occlusal trauma
- mobility
- thickened PDL
- hx of bruxism/clenching
- missing/tilted teeth
- occlusal interferences - working side
- occlusal slide in CR
- occlusal interference in protrusion
_____: a tremulous vibratory movement of a tooth when teeth come into ____ ____ - generally detected by finger palpation.
Fremitus
Functional Contact
4 main differences between tension and compression in the periodontium
Compression 1. eventually the PDL space increases, 2. reabsorption of bone 3 possible root resorption, 4 loss of fiber orientation
Tension 1. decrease in PDL space 2 apposition of bone, 3. cemental tearing, 4 rupture of PDL fiber bundles
Hyperfunction: _____ increase in occlusal forces, considered to be a ______ _____ and not a pathologic entity, increase in ___ & ___ of collagen fiber bundles in PDL, ____ width of PDL, increased ____ & ____ of alveolar bone proper (lamina dura), radiographic evidence of _____ of alveolar bone with PDL insertions, and slight or undetectable tooth ____.
Slight physiologic adaptation number & diameter increased density & thickness osteosclerosis mobility
Hypofunction: a mild weakening of the tooth supporting structures due to a lack of _____ _____. Considered to be a physiologic adaptation and not a _____ ____. Can only be diagnosed by _____. Decrease in number of ___ ___ ___ but normal orientation, decreased physiologic turnover and ____ of alveolar bone, ____ of PDL space, and ____ change in tooth mobility
physiologic stimulation pathologic entity histology PDL fiber bundles remodeling narrowing no
____ Atrophy: total removal of ___ ___ resulting in lack of the level of physiologic stimulation required to maintain normal ___ & ____. Considered to be a _____ adaptation rather than a pathologic feature of disease. Radiographic evidence of ____ width of PDL space, ____ tooth mobility is always present, absence of occlusal ____, loss of ___ of the principal fiber bundles of the PDL, and significant ___ in number of bone trabeculae
Disuse occlusal forces form & function physiologic decreased increased antagonist orientation decrease
term describing when occlusion causes recession of keratinized gingiva due to malocclusion
Palatal impingement (tx with ortho first)
What is iatrogenic perio disease treated by?
crown lengthening and re-restoring the tooth - due to impingement of biological width
8 modifying factors of furcation involvement
- cervical enamel projections
- enamel pearls
- Accessory canals
- Root anatomy
- root trunk length
- supervised neglect
- difficult cleansability
- restorations
F, M, D root trunk lengths of maxillay molar
F = 4 mm M = 3 mm D= 5 mm
M, D root trunk lengths of maxillay premolar
M = 7 mm D = 7 mm
F, L root trunk lengths of mandibular molar
F = 3 mm L = 4 mm
