Permanent

Maxillary First Molar

Why we have molars????

The function of this molar is similar to that of all molars in regard to grinding being the principle action during mastication, commonly known as chewing.

Function

What is the tooth precede the

maxillary first molar? It is important to note that the permanent maxillary molars are not considered to have any teeth that precede it.

What is Maxillary 1st. Molar??

General characters of the Permanent Maxillary first Molar:1. Arch position:

General characters of the Permanent Maxillary first Molar:2. General form and function:• It is the largest and strongest tooth in

the maxillary arch.• It normally exhibits four functional

cusps, one tubercle and three well developed roots.

• The crown is the greatest bucco-lingual dimension than that of any tooth in the mouth. From the occlusal, the general outline is rhomboidal.

• In mastication, it functions with the other molars in grinding.

General characters of the Permanent Mandibular first Molar:3. Chronology:

• 1st. Evidence of calcification:

• Crown completed:

• Eruption:

• Root completion:

At birth

3 - 4 years.

6 - 7 years.

9 - 10 years.

MorphologyBuccal Aspect:

( Facial Aspect )I ) Crown:

1. Geometric outline.

2. Surface outlines:

- Mesial outline: ( including contact area )

- Distal outline: ( including contact area )

- Cervical outline.

- Occlusal outline.

3. Surface describtion:

II) Root: 1. Root trunck. 2. Mesiobuccal root (mesial & distal

outlines, apex) 3. Distobuccal root: (mesial & distal

outlines, apex) 4. Palatal (lingual ) root.

MorphologyLingual Aspect: I ) Crown:

1. Geometric outline:

2. Surface outlines:

- Mesial outline: ( including contact area )

- Distal outline: ( including contact area )

- Cervical outline:

- Occlusal outline:

3. Surface describtion:

II) Root: 1. Root trunck. 2. Palatal ( lingual ) 3. Mesiobuccal root (mesial & distal

outlines, apex) 4. Distobuccal root: (mesial & distal

outlines, apex)

(Palatal Aspect)

MorphologyMesial Aspect:

( Proximal Aspect )I ) Crown:

1. Geometric outline:

2. Surface outlines:

- Buccal outline: ( including crest of curvature )

- Lingual outline: ( including crest of curvature )

- Cervical outline:

- Occlusal outline.

3. Surface describtion.

II) Root: 1. Mesiobuccal root. 2. Lingual root. 3. shape. 4. Surface describtion.

MorphologyDistal Aspect:

( Proximal Aspect )I ) Crown:

1. Geometric outline:

2. Surface outlines:

- Buccal outline ( including crest of curvature )

- Lingual outline ( including crest of curvature )

- Cervical outline.

- Occlusal outline.

3. Surface describtion.

II) Root: 1. Distobuccal root. 2. Lingual root. 3. Shape. 4. Surface describtion.

MorphologyOcclusal Aspect: 1. geometric outline:

2. dimensions.

3. surface outlines:

- Buccal outline.

- Lingual outline.

- Mesial outline.

- Distal outline

4. surface describtion:

- cusps.

- grooves.

- fossae.