The maxillary central incisors are centered in the maxilla, one on either side of the median line, with the mesial surface of each in contact with the mesial surface of the other

These teeth have incisal ridges or edges rather than cusps such as are found on the canines and posterior teeth.

The labial face is less convex than that of the maxillary lateral incisor or canine, which gives the central incisor a squared or rectangular appearance

The crown is wider on the inciso-cervical side than on the mesiodistal side.

When compared to the mesio-incisal angle, the disto-incisal angle is more rounded.

Although the root has a similar shape to the crown, it is far longer in proportion to the crown than the center ratio suggests when comparing the two.

Crown is more constricted at the cervix in relation to its mesiodistal width.

Instead of an incisal edge that is relatively straight, it has a long, well-developed, sharp cusp.

Compared with that of the permanent maxillary canine, the cusp on the primary canine is much longer and sharper, and the crest of contour mesially is not as far down toward the incisal portion.

A line drawn through the contact areas of the deciduous canine would bisect a line drawn from the cervix to the tip of the cusp.

Root of the primary canine is long, slender, and tapering and is more than twice the crown length.

Primary first molars are also much wider buccolingually in their mesial half because of the very prominent mesial buccal cervical ridge.

usually have four cusps, but they appear similar to maxillary premolars from the occlusal view since they have only two prominent cusps

four-cusp type primary maxillary first molars usually form an “H” pattern

The three roots (mesiobuccal, distobuccal, and palatal) of the primary maxillary first molar are thin and slender and widely spread apart

With cusp ridges and fossae corresponding to to those of permanent first molars

Maxillary primary second molars may even have a cusp of Carabelli

have a much more prominent mesiobuccal cervical ridge and constricted crown cervix compared to permanent molars

Sharp mesioincisal and distoincisal angles towards the cervical line

Larger in measurements than the central incisor except labiolingually

Lingual surface of the crown is more concave between the marginal ridges

There is a tendency for the incisal ridge to slope downwards distally, causing the distal contact area to lower apically in order for the contact area with the mesial surface of the primary mandibular canine to be made

The difference between the mandibular canine and the maxillary canine is mainly in the dimensions.

The crown is perhaps 0.5 mm shorter, and the root is at least 2 mm shorter.

For the universal tooth numbering system, the alphabet of “M” refers to mandibular primary left canine and “R” refers to mandibular primary right canine.

Whereas for the FDI tooth numbering system, “83” refers to mandibular primary left canine and “73” refers to mandibular primary right canine

The mandibular first molar does not resemble any of the other teeth, deciduous or permanent. Because it varies so much from all others, it appears strange and primitive.

Following the universal tooth numbering system, it uses alphabet of “L” which refers to mandibular primary left first molar and “S” for mandibular primary right first molar.

The primary mandibular second molar has characteristics that resemble those of the permanent mandibular first molar, although its dimensions differ

From the occlusal aspect, this tooth resembles the permanent first molar.

It is somewhat rhomboidal and has four well-developed cusps and one supplemental cusp: mesiobuccal, distobuccal, mesiolingual, distolingual, and fifth cusp.