錯牙合畸形的病因培訓(xùn)課件

1、錯牙合畸形的病因錯牙合畸形的病因Systems of ClassificationInherited (predetermined)(genetic)Acquired(environmental)2錯牙合畸形的病因Systems of ClassificationInherSystems of Classification1) McCoy and Shepard(1956) a) Direct(determining) b) Indirected(predisposing)2) Moyers(1972) a)Heredity b)Developmetal Defects c)Trauma d)

2、 Physical agents e) Habits f) Diseases g)malnutrition 3錯牙合畸形的病因Systems of Classification1) McClassification3.Salzman a) Prenatal b) Postnatal4.Graber a) General (extrinsic) factors b) Local (intrinsic) factors4錯牙合畸形的病因Classification3.Salzman4錯牙合畸形的Graber General factorsHeredityCongenital defectsEnvi

3、ronmentPredisposing metabolic climate &diseaseDietAbnormal pressure habitsPostureTrauma5錯牙合畸形的病因Graber General factorsHeredityHeredityTwo Facts1.For each individual there is a basic pattern or blueprint for dentofacial development not really which may be masked but not really changed.(unless by surg

4、ery).2.Racial and familial characteristics repeat 6錯牙合畸形的病因HeredityTwo Facts6錯牙合畸形的病因Facial TypingBrachycephalic-short, broadDolicocephalic-narrow, tapering, longMesocephalic-round, oval7錯牙合畸形的病因Facial TypingBrachycephalic-shFacial Typing-profileConvex-Class Two (protrusive maxilla or retrusive mand

5、ible) or Class 1 bimaxillaryConcave-Class Three (protrusive mandible or retrusive maxilla)Flat-Class One (denture bases in harmony)8錯牙合畸形的病因Facial Typing-profileConvex-ClAffected by HeredityTooth sizeArch length and widthHeight of the palatal vaultCrowding or spacingOverbite and overjetPosition and

6、configuration of musclesTongue size and shapeCharacter of the oral mucosa9錯牙合畸形的病因Affected by HeredityTooth sizeHeredity also plays a role in:Congenital deformitiesFacial asymmetrySize and position of the jawsOligodontia and anodontiaSupernumerary teethVariations in tooth shape10錯牙合畸形的病因Heredity als

7、o plays a role in:Examples of Congenital DefectsClefts of the lip and palateCerebral PalsyCrouzons syndromeCleido-Cranial DysostosisCranial Synostosis11錯牙合畸形的病因Examples of Congenital DefectsCrouzons Syndrome12錯牙合畸形的病因Crouzons Syndrome12錯牙合畸形的病因Surgery to reopen cranial sutures13錯牙合畸形的病因Surgery to re

8、open cranial sutuResults of Surgery & Orthodontics14錯牙合畸形的病因Results of Surgery & OrthodontResults of Surgery & Orthodontics15錯牙合畸形的病因Results of Surgery & OrthodontResults of Surgery & Orthodontics16錯牙合畸形的病因Results of Surgery & OrthodontEnvironmental FactorsPrenatal trauma maternal diet maternal meta

9、bolism & diseases fetal posture maternal consumption of alcohol & drugs17錯牙合畸形的病因Environmental FactorsPrenatal1Environmental FactorsPostnatal Birth injuries TMJ injuries Accidents, fractures Avulsion or displacement of teeth 18錯牙合畸形的病因Environmental FactorsPostnataMetabolic Factors & DiseasesAcute fe

10、brile disease- e.g. measles, mumpes, chicken-pox,etc.Diseases of muscle dysfunction-e.g. muscular dystrophy, cerebral palsy, polio.Endocrine disorders-e.g. pituitary,thyroid,parathyroid.19錯牙合畸形的病因Metabolic Factors & DiseasesAcDietPoor diet may cause deficiency diseases such as richetts, beri scurvy

11、etc.These may cause severe malocclusion due to interference with craniofacial growth and development in addition Periodontal problems associated with significant bone loss20錯牙合畸形的病因DietPoor diet may cause deficPostureNot an important factorMay be a contributing factorSeldom considered a primary caus

12、e21錯牙合畸形的病因PostureNot an important factorHabitsThumb or finger suckingForeign objectsTongue thrustingLip or cheek bitingMentalis muscle strain22錯牙合畸形的病因HabitsThumb or finger sucking2Thumb Sucking23錯牙合畸形的病因Thumb Sucking23錯牙合畸形的病因 Treatment Phase 1 24錯牙合畸形的病因 Treatment Phase 1 24錯牙合畸形的病因progress25錯牙合畸

13、形的病因progress25錯牙合畸形的病因Treatment Phase 226錯牙合畸形的病因Treatment Phase 226錯牙合畸形的病因Post Treatment27錯牙合畸形的病因Post Treatment27錯牙合畸形的病因Tongue Thrusting28錯牙合畸形的病因Tongue Thrusting28錯牙合畸形的病因Treatment29錯牙合畸形的病因Treatment29錯牙合畸形的病因progress30錯牙合畸形的病因progress30錯牙合畸形的病因Hyperactive mentalis muscle31錯牙合畸形的病因Hyperactive m

14、entalis muscle31錯Local factorsCongential absence of teethAnomalies of tooth sizeAnomalies of tooth shapeAbnormal labiel frenumPremature loss of deciduos teethSupernumerary teeth 32錯牙合畸形的病因Local factorsCongential absencLocal FactorsAbnormal resorption of deciduous teethDelayed eruption of permanent t

15、eethAbnormal eruptive pathAnkylosis of deciduous teethProximal cariesImproperly contoured restorations33錯牙合畸形的病因Local FactorsAbnormal resorptiCongenital absense of teeth34錯牙合畸形的病因Congenital absense of teeth34錯Missing and peg-shaped lateral35錯牙合畸形的病因Missing and peg-shaped lateralSpace adjusted36錯牙合畸形

16、的病因Space adjusted36錯牙合畸形的病因Retention37錯牙合畸形的病因Retention37錯牙合畸形的病因Temporary Restorations38錯牙合畸形的病因Temporary Restorations38錯牙合畸形的Congenitally Missing Laterals39錯牙合畸形的病因Congenitally Missing Laterals3Spaces Opened40錯牙合畸形的病因Spaces Opened40錯牙合畸形的病因Temporary Restorations41錯牙合畸形的病因Temporary Restorations41錯牙

17、合畸形的Mandibular retrusion42錯牙合畸形的病因Mandibular retrusion42錯牙合畸形的病因Mandibular Prognathism and facial asymmetry43錯牙合畸形的病因Mandibular Prognathism and facMandibular Prognathism & facial asymmetry44錯牙合畸形的病因Mandibular Prognathism & faciaBilateral Clefts45錯牙合畸形的病因Bilateral Clefts45錯牙合畸形的病因Expansion46錯牙合畸形的病因E

18、xpansion46錯牙合畸形的病因Pre-grafting47錯牙合畸形的病因Pre-grafting47錯牙合畸形的病因錯牙合畸形的病因培訓(xùn)課件Dilantin Hyperplasia49錯牙合畸形的病因Dilantin Hyperplasia49錯牙合畸形的病因Tooth Size 50錯牙合畸形的病因Tooth Size 50錯牙合畸形的病因Over Retained Primary Canine51錯牙合畸形的病因Over Retained Primary Canine51Ectopic Eruption52錯牙合畸形的病因Ectopic Eruption52錯牙合畸形的病因Anklosed primary molar53錯牙合畸形的病因Anklosed primary molar53錯牙合畸形的Ectopic Eruption54錯牙合畸形的病因Ectopic Eruption54錯牙合畸形的病因Premature loss of Pr