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1

RR I C H A R D I C H A R D YY O O NO O N 11

TTHE HE DDEVELOPING EVELOPING OOCCLUSIONCCLUSION ©©

AA T T AA GG L A N C EL A N C E

RR I C H A R D I C H A R D YY O O NO O N 22

TTHE HE DDEVELOPING EVELOPING OOCCLUSIONCCLUSION ©©

First transitional periodFirst transitional period

First First intertransitionalintertransitional period period

Birth to the complete primary dentitionBirth to the complete primary dentition

Second Second intertransitionalintertransitional periodperiod

Second transitional periodSecond transitional period

Adult dentitionAdult dentition

SS I X I X SS T A G E ST A G E S

Orderly SequenceOrderly Sequence

RR I C H A R D I C H A R D YY O O NO O N 33

TTHE HE DDEVELOPING EVELOPING OOCCLUSIONCCLUSION ©©

Identifiable PeriodsIdentifiable Periods

Continuum of ActivityContinuum of Activity

Quiescent InterludesQuiescent InterludesFirst transitional period

First intertransitional period

Birth to the complete primary dentition

Second intertransitional period

Second transitional period

Adult dentition

SS I X I X SS T A G E ST A G E S

2

RR I C H A R D I C H A R D YY O O NO O N 44

TTHE HE DDEVELOPING EVELOPING OOCCLUSIONCCLUSION ©©

SS T A G E T A G E 11

First transitional period

First intertransitional period

Birth to the complete primary dentitionBirth to the complete primary dentition

Second intertransitional period

Second transitional period

Adult dentition

8 mos.8 mos.

00--3 years3 years

RR I C H A R D I C H A R D YY O O NO O N 55

TTHE HE DDEVELOPING EVELOPING OOCCLUSIONCCLUSION ©©

First transitional period

First intertransitional period

Birth to the complete primary dentitionBirth to the complete primary dentition

Second intertransitional period

Second transitional period

Adult dentition

SS T A G E T A G E 1 I1 I M M A T U R I T Y M M A T U R I T Y OO F F TT H E H E MM A N D I B L EA N D I B L E

RR I C H A R D I C H A R D YY O O NO O N 66

TTHE HE DDEVELOPING EVELOPING OOCCLUSIONCCLUSION ©©

First transitional period

First intertransitional period

Birth to the complete primary dentitionBirth to the complete primary dentition

Second intertransitional period

Second transitional period

Adult dentition

SS T A G E 1T A G E 1

3

RR I C H A R D I C H A R D YY O O NO O N 77

TTHE HE DDEVELOPING EVELOPING OOCCLUSIONCCLUSION ©©

SS T A G E T A G E 11 EE R U P T I O N R U P T I O N PP A T T E R N A T T E R N

First transitional period

First intertransitional period

Birth to the complete primary dentitionBirth to the complete primary dentition

Second intertransitional period

Second transitional period

Adult dentition

RR I C H A R D I C H A R D YY O O NO O N 88

TTHE HE DDEVELOPING EVELOPING OOCCLUSIONCCLUSION ©©

SS T A G E T A G E 11 R R U L EU L E O O FF F F O U R O U R

RR I C H A R D I C H A R D YY O O NO O N 99

TTHE HE DDEVELOPING EVELOPING OOCCLUSIONCCLUSION ©©

First transitional period

First intertransitional period

Birth to the complete primary dentitionBirth to the complete primary dentition

Second intertransitional period

Second transitional period

Adult dentition

SS T A G E T A G E 11

2.5 yrs.2.5 yrs.

4

RR I C H A R D I C H A R D YY O O NO O N 1010

TTHE HE DDEVELOPING EVELOPING OOCCLUSIONCCLUSION ©©

First transitional period

First First intertransitionalintertransitional period period

Birth to the complete primary dentition

Second intertransitional period

Second transitional period

Adult dentition

SS T A G E T A G E 2 Q 2 Q U I E S C E N TU I E S C E N T I I N T E R L U D EN T E R L U D E

SpacingSpacingVertical ChangesVertical ChangesVertical RelationshipVertical Relationship

33--6 years6 years

RR I C H A R D I C H A R D YY O O NO O N 1111

TTHE HE DDEVELOPING EVELOPING OOCCLUSIONCCLUSION ©©

SS T A G E T A G E 2 F 2 F I R S TI R S T I I N T E R T R A N S I T I O N A LN T E R T R A N S I T I O N A L P P E R I O DE R I O D

SS P A C EP A C E

PP R I M A T ER I M A T E GG E N E R A L I Z E DE N E R A L I Z E D

40 %40 %60 %60 %

RR I C H A R D I C H A R D YY O O NO O N 1212

TTHE HE DDEVELOPING EVELOPING OOCCLUSIONCCLUSION ©©

SS T A G E T A G E 2 P 2 P R I M A T ER I M A T E S S P A C E SP A C E S

First transitional period

First First intertransitionalintertransitional period period

Birth to the complete primary dentition

Second intertransitional period

Second transitional period

Adult dentition

5

RR I C H A R D I C H A R D YY O O NO O N 1313

TTHE HE DDEVELOPING EVELOPING OOCCLUSIONCCLUSION ©©

SS T A G E T A G E 2 G 2 G E N E R A L I Z E DE N E R A L I Z E D S S P A C E SP A C E S

First transitional period

First First intertransitionalintertransitional period period

Birth to the complete primary dentition

Second intertransitional period

Second transitional period

Adult dentition

RR I C H A R D I C H A R D YY O O NO O N 1414

TTHE HE DDEVELOPING EVELOPING OOCCLUSIONCCLUSION ©©

First transitional period

First First intertransitionalintertransitional period period

Birth to the complete primary dentition

Second intertransitional period

Second transitional period

Adult dentition

SS T A G E T A G E 2 V 2 V E R T I C A LE R T I C A L C C H A N G E SH A N G E S

RR I C H A R D I C H A R D YY O O NO O N 1515

TTHE HE DDEVELOPING EVELOPING OOCCLUSIONCCLUSION ©©

First transitional period

First First intertransitionalintertransitional period period

Birth to the complete primary dentition

Second intertransitional period

Second transitional period

Adult dentition

SS T A G E T A G E 2 V 2 V E R T I C A LE R T I C A L R R E L A T I O N S H I PE L A T I O N S H I P

6

RR I C H A R D I C H A R D YY O O NO O N 1616

TTHE HE DDEVELOPING EVELOPING OOCCLUSIONCCLUSION ©©

SS T A G E T A G E 2 V 2 V E R T I C A LE R T I C A L R R E L A T I O N S H I P SE L A T I O N S H I P S

10%10%30%30%

40/20%40/20%

RR I C H A R D I C H A R D YY O O NO O N 1717

TTHE HE DDEVELOPING EVELOPING OOCCLUSIONCCLUSION ©©

First transitional period

First First intertransitionalintertransitional period period

Birth to the complete primary dentition

Second intertransitional period

Second transitional period

Adult dentition++----

SS T A G E T A G E 2 A 2 A P P O S I T I O NP P O S I T I O N & R & R E S O R P T I O NE S O R P T I O N

RR I C H A R D I C H A R D YY O O NO O N 1818

TTHE HE DDEVELOPING EVELOPING OOCCLUSIONCCLUSION ©©

K K E Y P O I N T SE Y P O I N T S

Vertical PositioningVertical PositioningSpacingSpacingMolar Terminal PlaneMolar Terminal Plane

7

RR I C H A R D I C H A R D YY O O NO O N 1919

TTHE HE DDEVELOPING EVELOPING OOCCLUSIONCCLUSION ©©

First transitional periodFirst transitional period

First intertransitional period

Birth to the complete primary dentition

Second intertransitional period

Second transitional period

Adult dentition

SS T A G E T A G E 3 F 3 F I R S TI R S T E E X C H A N G EX C H A N G E

66--8 years8 years

RR I C H A R D I C H A R D YY O O NO O N 2020

TTHE HE DDEVELOPING EVELOPING OOCCLUSIONCCLUSION ©©

SS T A G E T A G E 3 F 3 F I R S TI R S T T T R A N S I T I O N A LR A N S I T I O N A L P P E R I O DE R I O D

RR I C H A R D I C H A R D YY O O NO O N 2121

TTHE HE DDEVELOPING EVELOPING OOCCLUSIONCCLUSION ©©

SS T A G E T A G E 3 F 3 F I R S TI R S T T T R A N S I T I O N A LR A N S I T I O N A L P P E R I O DE R I O D

8

RR I C H A R D I C H A R D YY O O NO O N 2222

TTHE HE DDEVELOPING EVELOPING OOCCLUSIONCCLUSION ©©

SS T A G E T A G E 3 F 3 F I R S TI R S T T T R A N S I T I O N A LR A N S I T I O N A L P P E R I O DE R I O D

RR I C H A R D I C H A R D YY O O NO O N 2323

TTHE HE DDEVELOPING EVELOPING OOCCLUSIONCCLUSION ©©

SS T A G E T A G E 3 F 3 F I R S TI R S T T T R A N S I T I O N A LR A N S I T I O N A L P P E R I O DE R I O D

RR I C H A R D I C H A R D YY O O NO O N 2424

TTHE HE DDEVELOPING EVELOPING OOCCLUSIONCCLUSION ©©

SS T A G E T A G E 3 F 3 F I R S TI R S T T T R A N S I T I O N A LR A N S I T I O N A L P P E R I O DE R I O D

9

RR I C H A R D I C H A R D YY O O NO O N 2525

TTHE HE DDEVELOPING EVELOPING OOCCLUSIONCCLUSION ©©

SS T A G E T A G E 3 F 3 F I R S TI R S T T T R A N S I T I O N A LR A N S I T I O N A L P P E R I O DE R I O D

LL FF

RR I C H A R D I C H A R D YY O O NO O N 2626

TTHE HE DDEVELOPING EVELOPING OOCCLUSIONCCLUSION ©©

SS T A G E T A G E 3 F 3 F I R S TI R S T T T R A N S I T I O N A LR A N S I T I O N A L P P E R I O DE R I O D

Incisor LiabilityIncisor Liability

RR I C H A R D I C H A R D YY O O NO O N 2727

TTHE HE DDEVELOPING EVELOPING OOCCLUSIONCCLUSION ©©

SS T A G E T A G E 3 I 3 I N C I S O RN C I S O R L L I A B I L I T YI A B I L I T Y

InterdentalInterdental SpacingSpacing

IntercanineIntercanine Arch WidthArch Width

Anterior PlacementAnterior Placement

10

RR I C H A R D I C H A R D YY O O NO O N 2828

TTHE HE DDEVELOPING EVELOPING OOCCLUSIONCCLUSION ©©

First transitional periodFirst transitional period

First intertransitional period

Birth to the complete primary dentition

Second intertransitional period

Second transitional period

Adult dentition

SS T A G E T A G E 3 M 3 M E S I A LE S I A L S S H I F T SH I F T S

RR I C H A R D I C H A R D YY O O NO O N 2929

TTHE HE DDEVELOPING EVELOPING OOCCLUSIONCCLUSION ©©

SS T A G E T A G E 3 E 3 E A R L YA R L Y M M E S I A LE S I A L S S H I F T H I F T

66

RR I C H A R D I C H A R D YY O O NO O N 3030

TTHE HE DDEVELOPING EVELOPING OOCCLUSIONCCLUSION ©©

SS T A G E T A G E 3 L 3 L A T EA T E M M E S I A LE S I A L S S H I F T H I F T

1111

11

RR I C H A R D I C H A R D YY O O NO O N 3131

TTHE HE DDEVELOPING EVELOPING OOCCLUSIONCCLUSION ©©

SS T A G E T A G E 4 Q 4 Q U I E S C E N TU I E S C E N T I I N T E R L U D EN T E R L U D E

First transitional period

First intertransitional period

Birth to the complete primary dentition

Second Second intertransitionalintertransitional periodperiod

Second transitional period

Adult dentition

88--10 yrs.10 yrs.

RR I C H A R D I C H A R D YY O O NO O N 3232

TTHE HE DDEVELOPING EVELOPING OOCCLUSIONCCLUSION ©©

First transitional period

First intertransitional period

Birth to the complete primary dentition

Second Second intertransitionalintertransitional periodperiod

Second transitional period

Adult dentition

SS T A G E T A G E 4 L 4 L E E W A YE E W A Y S S P A C EP A C E

0.9 mm0.9 mm

1.7 mm1.7 mm

RR I C H A R D I C H A R D YY O O NO O N 3333

TTHE HE DDEVELOPING EVELOPING OOCCLUSIONCCLUSION ©©

SS T A G E T A G E 4 L 4 L E E W A YE E W A Y S S P A C EP A C E

Size DifferentialSize Differential

12

RR I C H A R D I C H A R D YY O O NO O N 3434

TTHE HE DDEVELOPING EVELOPING OOCCLUSIONCCLUSION ©©

First transitional period

First intertransitional period

Birth to the complete primary dentition

Second Second intertransitionalintertransitional periodperiod

Second transitional period

Adult dentition

SS T A G E T A G E 4 G 4 G A B L EA B L E E E F F E C TF F E C T

RR I C H A R D I C H A R D YY O O NO O N 3535

TTHE HE DDEVELOPING EVELOPING OOCCLUSIONCCLUSION ©©

First transitional period

First intertransitional period

Birth to the complete primary dentition

Second intertransitional period

Second transitional periodSecond transitional period

Adult dentition

SS T A G E T A G E 5 L 5 L A S TA S T E E X C H A N G EX C H A N G E

1010--12 yrs.12 yrs.

RR I C H A R D I C H A R D YY O O NO O N 3636

TTHE HE DDEVELOPING EVELOPING OOCCLUSIONCCLUSION ©©

First transitional period

First intertransitional period

Birth to the complete primary dentition

Second intertransitional period

Second transitional periodSecond transitional period

Adult dentition

SS T A G E T A G E 5 C 5 C U S P I D SU S P I D S

13

RR I C H A R D I C H A R D YY O O NO O N 3737

TTHE HE DDEVELOPING EVELOPING OOCCLUSIONCCLUSION ©©

First transitional period

First intertransitional period

Birth to the complete primary dentition

Second intertransitional period

Second transitional periodSecond transitional period

Adult dentition

SS T A G E T A G E 55

RR I C H A R D I C H A R D YY O O NO O N 3838

TTHE HE DDEVELOPING EVELOPING OOCCLUSIONCCLUSION ©©

SS T A G E T A G E 5 S 5 S E C O N DE C O N D T T R A N S I T I O N A LR A N S I T I O N A L P P E R I O DE R I O D

RR I C H A R D I C H A R D YY O O NO O N 3939

TTHE HE DDEVELOPING EVELOPING OOCCLUSIONCCLUSION ©©

SS T A G E T A G E 66

First transitional period

First intertransitional period

Birth to the complete primary dentition

Second intertransitional period

Second transitional period

Adult dentitionAdult dentition FunctionalFunctionalEstheticEstheticStableStable

1212--20 yrs.20 yrs.

14

RR I C H A R D I C H A R D YY O O NO O N 4040

TTHE HE DDEVELOPING EVELOPING OOCCLUSIONCCLUSION ©©

K K E Y P O I N T SE Y P O I N T S

First First First intertransitionalintertransitionalintertransitional period period period

Birth to the complete primary dentitionBirth to the complete primary dentitionBirth to the complete primary dentition

Second Second Second intertransitionalintertransitionalintertransitional periodperiodperiod

Second transitional periodSecond transitional periodSecond transitional period

Adult dentitionAdult dentitionAdult dentition

Normal Molar RelationshipNormal Molar Relationship

Early Early MesialMesial Shift of Permanent MolarsShift of Permanent Molars

Late Late MesialMesial Shift of Permanent MolarsShift of Permanent Molars

Incisor LiabilityIncisor Liability

Normal Normal IncisalIncisal RelationshipsRelationships

DefinitionsDefinitions

Eruption Eruption SequenceSequence

Molar Molar RelationshipsRelationships

PercentagesPercentages

First transitional periodFirst transitional periodFirst transitional period