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robbypowell's version from 2018-09-07 15:41

G&D (started 8-29)

which theory of craniofacial growth?

Question Answer
craniofacial growth is pre-programmed; intrinsic & extrinsic GENETIC factors are the major contributors/determinants of neurocranial growthSicher's Genetic Theory
Sutures and cartilage “have little or no role” in bone (neurocranial) growth; Appositional growth of bone at all surfaces, Internal ResorptionRemodeling Theory (1930)
Condyle acts like “bent long bone” with two epiphyseal plates; Circummaxillary suture system forces downward and forward growth of midfaceScott's Sutural Theory ((1940)
Cartilage and periosteum are sites of intrinsic, genetically controlled bone growth via epiphyseal platesScott's Sutural Theory (1940)
Sutures - secondary and compensatory sites of bone formation and growth BUT ARE NOT PRIMARY CENTERS OF GROWTH... INSTEAD its the nasal septum that drives facial growthCartilaginous/Nasal Septum Theory (Scott-1950)
There is No genetic determination in craniofacial Growth and Development; The craniofacial skeleton grows in direct response to the EXTRINSIC ENVIRONMENTMoss's Functional Matrix Theory (1960)
This theory is the basis for Dentofacial OrthopedicsMoss's Functional Matrix Theory
Bionator applies principles of which growth theory?Moss's Functional Matrix Theory
hormonally regulated growth of the midface and anterior cranial base provides a constantly changing reference input via the occlusion; midfacial growth has a rate-limiting effect upon the growth of the mandiblePetrovic’s Servomotor Theory of Facial Growth (1970’s)


Remodeling theory
Sutural theory
Cartilaginous/Nasal Septum theory - Synchondroses
Functional Matrix theory
Van Limborgh’s theory
Enlow’s Expanding V theory
Petrovic’s Servomotor theory

bone growth

Question Answer
_____ is the type of bone "growth" where One bony surface is moving as the result of movement of bone at another surfaceTranslation
As maxilla translates downward and forward, _____ ____ influences the resorptive remodeling at external surfacesSoft Tissue
_____ is bone growth/movement where there is deposition of bone on one surface and resorption on the contralateral surfaceTransformation (Drift)
Drift and transformational growth (deposition on outside and resoption on inside) is seen where in craniofacial growthCranial Vault (as the example given, not claiming to be the ONLY place)
t/f: facial growth dictated by cranial growthtrue
t/f: cranial growth dictated by facial growthtrue
t/f: not everyone grows at the same "temporal setting" or 1 particular timeTrue
t/f: growth is continuousFalse? apparently its a process of intermittent apposition and rest
Hypertrophy is an increase in the ____ (size/number) of cellssize
Hyperplasia is an increase in the ____ (size/number) of cellsnumber

intramembraneous or endochondral?

Question Answer
no cartilage precursorintramembraneous
secretion of bone matrix directly within connective tissuesintramembraneous
bones more distant from facial or cranial midlineintramembraneous
Cartilage precursorENdochondral
Cartilage converted to boneENdochondral
Bones located at or near cranial midlineENdochondral
Growth occurs at junctions of SuturesIntramembraneous
Fontanelle's associated with ....Intramembraneous
Synchondroses are associated with ...Endochondral
condyle of mandibleendochondral (from SECONDARY cartilage)
body of mandibleintramembraneous
Fetal TMJ key movement and compressive forces --> development of secondary cartilageEndochondral (specifically condylar cartilage)
differentiation of tmj growth sires (condyle, glenoid fossa and the disc) occurs 14th in response to loading ... what type of ossification?Endochondral

Indicators of growth

Question Answer
____ (males/females) reach growth peak velocity first?females
what are some male maturity indicators ocurring at or near the growth curve?no true biologic indicators, radiographic (vertebral, hand bones)
what are some female maturity indicators ocurring at or near the growth curve?Menarche (after peak velocity), radiographic (vertebral, hand bones)
how many stages are there of cervical development?6
hooking of the hamate
epiphysis width
epiphysis capping
epiphyseal fusion
sesamoid bone ossification
epiphyseal widening