10 drawing of-posterior_teeth_-practical_-_4

Drawing& Carving of Posterior Permanent Teeth

By

Prof.Dr. Malak Soliman&

Dr. Hussein El Maghraby

Drawing of the Permanent Posterior Teeth

• The five aspects of each tooth are drawn on graph paper. Every measurement will be 4 times that of the natural tooth. The page will be divided into 4equal rectangular for the buccal, lingual ,mesial &distal surfaces .A small square is drawn for the occlusal aspect.

Buccal Lingual Mesial Distal

Occlusal

Upper first Premolars 4

Measurements for drawing

• Length of the ……… Crown 34 mm

……… Root 56 mm

• Width of the …….. Crown 28 mm (Mesiodistal dimension)…Neck 20 mm

• Thickness of the………Crown 36 mm

(Buccolingual dimension).. Neck 32 mm

• Cervical line curvature Mesially 4 mm

…..Distally 0 mm

Upper first Premolars 4

Measurements for carving

• Length of the ……… Crown 8.5 mm






…..Distally 0 mm

Buccal & Lingual Aspects of 4M D

1010

34

56

10 10

•The mesial& distal outlinesare slightly concave .•The mesial contact area is convex and is located at the middle third just occlusal to the crown midway 34/2 -1=16 •The distal contact area is convex and is located at the junction of the occlusal &middle thirds ( 11mm from occlusal surface, 34/3).•The mesial cusp slope is longer than the distal one.•The lingual cusp is shorterby 4mm and narrowerthan the buccal one.•The cusp tips are sharp and slightly distal to the central line

1611 4

14

14

The Mesial & Distal Aspects of 4

16 16 16 16

L

18

18

BL

4

34

56

8.5

15

4 4

•The maximum convexity buccally is located at ¼ of the crown length( 8.5 m )and lingually at crown midway( 34-4/2 = 15m ).• The lingual cusp is shorter by 4m than the buccal one.• The buccal& lingual cusp tips are apart by less than the neck thickness 32-2= 30m.• The buccal cusp tip is at one line with the apex of the buccal root.• The lingual cusp tip is at one line with the outer surface of the lingual cusp.

3o

Occlusal Aspect of 4

18

18

14 14

Occlusal aspect is hexagonal•Distobuccal arm = mesiobuccal arm•Distal arm > mesial arm•Distolingual arm> Mesiolingual arm• Buccal surface > lingual surface

(lingual convergent)

Drawing of upper second premolar 5

B L M D

occlusal

Lower first Premolars 4





• Thickness of the………Crown 3o mm



…..Distally 0 mm



• Length of the ……… Crown 8.5 mm



• Thickness of the………Crown 7.5 mm

(Buccolingual dimension) Neck 6.5 mm


…..Distally 0 mm

Buccal & Lingual Aspects of 4

34

56

10 10

M D•Mesial& distal contact areas are at the same level, slightly Cervical to the junction of the occlusal & middle thirds 34/3 +4 =15.• Mesial slope is shorter than the distal slope.• The cusp tip located little mesially.•The lingual cusp length is 2l3 of the buccal cusp 34x2/3=22•Mesiolingual developmental groove at the arrow

15

1414

22

Mesial& distal aspects of 4

22

56

13 13

•Maximum convexity buccally is at¼ the length (34/4=8.5)• Maximum convexity lingually is at½ crown length (22/2=11)• The buccal cusp tip is at one line

with the tooth bisecting line.

15 15

118.5

34

Occlusal aspect of 4

1414

20

10

The buccal cuspoccupy The 2/3occlusal aspect=20,while thelingual cuspoccupy the 1/3=10.









…..Distally 0 mm




……… Root 14.5 mm



(Buccolingual dimension) Neck 7 mm


…..Distally 0 mm

Buccal & Lingual Aspects of 5

32

58

1010

M MD14

144

MLDL

Mesial& distal aspects of 5

14 14

1616

32

58

•The line bisectingthe tooth reach2 mm lingual tobuccal cusp tip.• The maximum Convexity buccallyat 1/4the crownlength( 32/4= 8 ).The maximum

Convexity linguallyat ½ the crownlength( 32-4/3= 10x2=20 ).

208

2

BML

B ML

DL

Occlusal aspect of 5

The buccal cuspoccupy 2/3 -2 thecrown thickness=20The lingual cusp=12

1513

20

12

MLDL

B

Upper first Permanent molars 6

Measurements for carving• Length of the ……… Crown 7.5 mm

……. Root buccal 12 mm

……. lingual 13 mm





…..Distally 0 mm

Upper first Permanent molar 6

Measurements for drawing• Length of the ……… Crown 30 mm

Root……. buccal 48 mm

………. lingual 52 mm





…..Distally 0 mm

Buccal Aspect

• Mesial contact area is atthe junction of occlusal & middle thirds . (30/3=10)• Distal contact area is atthe middle third. (30/2=15)

• The M.B & D.B cusp tips arelocated at20/2 from the midline

48

52

15

30

Lingual aspect

25

15

52

16 16

30

The M L cusp is larger than theD L cusp by 5 mm , The widthOf the M L cusp is 25 mm &the D L Cusp is 15mm.

ML

DL

Mesial Aspect

48

30

52

•The maximum convexity buccally is at the cervical ¼ (30/4=7.5)lingually at the middle third ( 30/2=15)• The MB & ML cusp tips are apart from each other by little more than the half of the thickness of the crown( 44/2 + 2=24),each cusp tip apart from the middle line by 12mm.

Distal aspect Occlusal Aspect

22

22

2020

MLDL

MBDB

DBDL

Upper Second Molar 7

BuccalLingual Mesial Distal

Occlusal

MB

ML

DB

DL

MB DB

MLDL ML MB DB DL

Lower first Permanent molar 6



…………. Root 56 mm

Width of the …….. Crown 44 mm (Mesiodistal dimension)…Neck 36 mm




…..Distally 0 mm

Lower first Permanent molar 6

Measurements for carving• Length of the ……… Crown 7.5 mm

……… Root 14 mm• Width of the …….. Crown 11 mm

(Mesiodistal dimension)…Neck 9 mm

• Thickness of the………Crown 10.5 mm(Buccolingual dimension) Neck 9 mm

• Cervical line curvature Mesially 1 mm…..Distally 0 mm

Buccal aspect

•Width of the crown=44mmThe MB cusp is the largest=18The DB cusp is slightly smaller=17The D cusp is the smallest=9•The mesial contact area is at the junction of the occlusal &middle third 30/3=10mm from occlusal• The distal contact area is at the middle third 30/2=15mm

MBDBD

Lingual Aspect Mesial Aspect

The maximumConvexity buccally

at ¼ =30/4=9.5

Lingually at midway=30/2=15mmThe buccal cusp tip is2mm buccal to themidline.The distance betweenThe 2 cusps is littlelarger than the halfOf the crown thickness=42/2+1=22mm

9.5

ML DLD

MLMB

Distal Aspect Occlusal Aspect

44

42

MB DBD

MLDL

D DB

MB

DL

ML

Buccal Lingual Mesial Distal

OcclusalLower Second Molar 7

MB DB DL ML MLMB DBDL

Thank You

10 drawing of-posterior_teeth_-practical_-_4

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