Term
|
Definition
| Abnormal immobility or consolidation of a joint |
|
|
Term
| Pathogenesis of ankylosis |
|
Definition
| direct fusion of tooth to bone in at least part of PDL space, results in cessation of tooth eruption after emergence into oral cavity |
|
|
Term
|
Definition
| common isolated single or multiple missing teeth |
|
|
Term
| Most common teeth missing in hypodontia |
|
Definition
| third molars, second premolars, lateral incisors |
|
|
Term
| Hypodontia of permanent missing teeth is associated with... |
|
Definition
| Reduced alveolar development, retained primary teeth |
|
|
Term
| True or false: absence of deciduous tooth strongly associated with absence of permanent successor |
|
Definition
|
|
Term
|
Definition
| Total lack of tooth development |
|
|
Term
|
Definition
| Lack of development of 6 or more teeth |
|
|
Term
| Multiple missing teeth is... |
|
Definition
| hereditary hypohydrotic ectodermal dysplasia |
|
|
Term
|
Definition
| common isolated or multiple supernumerary teeth |
|
|
Term
| Teeth most affected by hyperdontia |
|
Definition
| maxillary incisors (mesiodens), maxillary and mandibular molars (paramolars and distomolars) premolars, canines, lateral incisors |
|
|
Term
| Mesiodens are associated with what teeth and developmental alteration |
|
Definition
Maxillary incisors
Hyperdontia |
|
|
Term
| Accessory teeth are present when? |
|
Definition
At or shortly after birth
- Natal teeth (present at birth)
- Neonatal teeth (erupt w/in 30 days of after birth) |
|
|
Term
| Common isolated single microdonts are... |
|
Definition
- Maxillary lateral incisor (peg lateral)
- Max and Mand third molars |
|
|
Term
| Generalized microdontia can be associated with which disorders? |
|
Definition
| Pituitary dwarfism, down syndrome |
|
|
Term
| Common isolated macrodonts |
|
Definition
Incisors, canines
2nd premolars & third molars |
|
|
Term
| Generalized macrodontia associated with which diseases |
|
Definition
| Pituitary gigantism, otodental syndrome, XXY male, pineal hyperplasia w/ hyperinsulinism |
|
|
Term
|
Definition
| attempt of single tooth bud to divide, resulting in a tooth w/ bifid crown and usually common root and root canal |
|
|
Term
|
Definition
| union of two normally separated tooth buds resulting in a joined tooth w/ confluence of dentin |
|
|
Term
| Definition of concresence |
|
Definition
| Two or more fully formed teeth joined by cementum only, withOUT confluence of underlying dentin |
|
|
Term
|
Definition
| delineated additional cusp on surface (usually lingual) of anterior tooth extending at least half the distance from CEJ to incisal edge |
|
|
Term
| Characteristics of talon cusp |
|
Definition
three-prolonged pattern resembleing eagle's talon
composed of enamel and dentin and most contain pulp extension |
|
|
Term
| Teeth most commonly seen with talon cusp |
|
Definition
| lingual surface of maxillary lateral or central incisors |
|
|
Term
|
Definition
| Cusp of carabelli, talon cusp, dens evaginatus |
|
|
Term
| Dens evaginatus definition |
|
Definition
| Cusp-like elevation of tooth structure located in central groove or lingual ridge of buccal cusp of a premolar or molar tooth |
|
|
Term
| Characteristics of dens evaginatus |
|
Definition
Normally consists of enamel and dentin but also contains pulpal extension in about 50% of cases
|
|
|
Term
| Teeth most commonly seen with dens evaginatus |
|
Definition
| Most commonly mandibular premolars and usually bilateral |
|
|
Term
| Dens invaginatus (dens in dente) definition |
|
Definition
| deep invagination of tooth crown or root which is lined by enamel |
|
|
Term
| Teeth most commonly affected by dens invaginatus |
|
Definition
| Permanent lateral incisors, centrals, premolars, canines and molars; great majority are max teeth |
|
|
Term
| True or False: dens invaginatus can be classified in types 1-3, progressively getting worse in each type |
|
Definition
|
|
Term
| What are the two types of dens invaginatus? |
|
Definition
| Coronal dens, radicular dens |
|
|
Term
| Which dens invaginatus type is seen more frequently? |
|
Definition
|
|
Term
| Characteristics of coronal dens invaginatus |
|
Definition
strong maxillary predominance
Classes 1-3 depending on how deep extends into tooth |
|
|
Term
| Characteristics of radicular dens invaginatus |
|
Definition
Rare
Thought to arise secondarily to proliferation of Hertwig's rooth sheath, w/ formation of a strip of enamel extending along surface of root
Altered enamel forms surface invagination into dental papilla |
|
|
Term
| Definition of ectopic enamel |
|
Definition
| Presence of enamel in unusual locations, mainly tooth root |
|
|
Term
|
Definition
Enamel pearls
Cervical enamel extensions |
|
|
Term
| Enamel pearls arise from... |
|
Definition
|
|
Term
| True or false: enamel pearls consist of enamel only. |
|
Definition
| False. Consist of enamel, can consist of dentin and pulp too |
|
|
Term
| Description of cervical enamel extensions |
|
Definition
Forms triangular extension of coronal enamel that develops on buccal surface of molar teeth directly overlying birfurcation
Base of traingle is continuous w/ inferior portion of coronal enamel, leading point extends directly toward bifurcation of tooth |
|
|
Term
| Where are enamel pearls most commonly seen? |
|
Definition
| Roots of maxillary molars |
|
|
Term
| Race most commonly seen w/ enamel pearls |
|
Definition
|
|
Term
| Most common location of enamel pearls |
|
Definition
| roots or near furaction area |
|
|
Term
| Cervical enamel extensions affects Mandibular or maxillary teeth more commonly? |
|
Definition
|
|
Term
| True or false: cervical enamel extensions have been associated w/ development of inflammatory cysts, along buccal furaction area. |
|
Definition
|
|
Term
| Definition of taurodontism |
|
Definition
| enlargement of body and pulp chamber of a multi-rooted tooth w/ apical displacement of pulpal floor and bifurcation of the roots |
|
|
Term
| Pattern of molar formation found in ancient Neanderthals is associated with what? |
|
Definition
|
|
Term
| Overall shape of taurodont is similar to molar of ____ animals? |
|
Definition
|
|
Term
| Definition of hypercementosis |
|
Definition
| Non-neoplastic deposition of excessive cementum that is continuous w/ normal radicular cementum |
|
|
Term
| What teeth are most commonly affected by hypercementosis? |
|
Definition
|
|
Term
| Treatment of hypercementosis |
|
Definition
|
|
Term
| Is hypercementosis associated with any disease(s)? |
|
Definition
Yes, Paget's disease of bone
Most often not associated to systemic disease |
|
|
Term
| Definition of dilaceration |
|
Definition
| Abnormal angulation or bend in root OR less freq crown |
|
|
Term
| Most cases of dilaceration are ______ |
|
Definition
|
|
Term
| Teeth most commonly affected by dilaceration |
|
Definition
|
|
Term
| Theory of how dilaceration occurs (most commonly) |
|
Definition
| # of teeth w/ this appear to arise after an injury that displaces calcified portion of tooth germ and remainder of tooth formed at abnormal angle |
|
|
Term
| What factors determine extent of tooth's malformation |
|
Definition
Age of pt
Direction
Degree of force |
|
|
Term
| Treatment/Prognosis of dilaceration |
|
Definition
| Varies depending on severity of deformity |
|
|
Term
|
Definition
| Increase # of roots on tooth, can occur in any teeth, no treatment needed |
|
|
