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Are First Premolars Important?

Due to significant crowding, extraction of the first premolars is necessary to properly align the remaining teeth. Orthodontics completed with the second premolars moved into the first premolar spaces and the front teeth properly aligned.

What is the difference between maxillary first and second premolar?

Maxillary. The first premolar will normally have two roots; other premolars are single rooted. The first premolar displays sharper, more prominent cusps with the buccal cusp being significantly larger than the palatal cusp; the second premolar has more rounded, shorter cusps that are similar in size and height.

Is the second premolar permanent?

The permanent central incisors, lateral incisors, canines, and first and second premolars replace the primary dentition. The primary molars are replaced with the permanent premolars, and the permanent molars erupt posterior to those….Permanent Dentition.

Tooth Eruption Date (Avg.)
2nd Molar 11-13 Years
3rd Molar 17-21 Years

How many premolar do we have?

Premolars – next to your canine teeth are your premolars (also called bicuspid teeth). You have 8 premolars in total: 4 on your top jaw and 4 on the bottom. They are bigger and wider than your incisors and canine teeth, and are used for crushing and grinding food.

When does first premolar fall out?

Permanent teeth eruption chart

Upper Teeth When tooth emerges
Upper Teeth When tooth emerges
Lateral incisor When tooth emerges 8 to 9 years
Canine (cuspid) When tooth emerges 11 to 12 years
First premolar (first bicuspid) When tooth emerges 10 to 11 years

Are premolars hard to extract? While it is generally difficult to extract a tooth with multiple roots, which may be the case with premolars, and all the more so if these roots are curved, crooked or hook-like, as they often are, an experienced oral surgeon is not likely to encounter challenges during the extraction.

How many roots does a maxillary second premolar have?

Maxillary second premolar usually has one root with one or two root canals. As reported by Vertucci, the occurrence of one canal with one apex is 75% and two canals at the apex are 24%. The presence of three canals at apex was found to be only 1%.

Can a premolar have two roots?

The number of roots for each type of tooth varies. Typically incisors, canines and premolars will have one root whereas molars will have two or three.

What is the function of the maxillary premolar?

Premolars are used to roughly chew food. With tough food, they are instinctively used to hold and bite the food. The maxillary first premolar (dens praemolaris medialis) (Fig 4-44) usually has a divided root apex, and in some cases there may be two roots. Very rarely three root apices may be found.

What is Phase 1 of maxillary first premolar extraction?

Phase 1 comprises extractions and MI insertion. Extraction of the two maxillary first premolars is indicated where there is excessive protrusion of the maxilla and/or a full Class II molar relationship where it is necessary to maintain maximum anchorage at the posterior teeth segment.

How many root apices are there in a maxillary premolar?

The maxillary first premolar (dens praemolaris medialis) (Fig 4-44) usually has a divided root apex, and in some cases there may be two roots. Very rarely three root apices may be found.

However, there are some very real reasons that today’s orthodontists still recommend the extraction of teeth. Currently, most orthodontists pursue nonextraction treatment plans for patients first, and then extract only when confronted with the following clinical problems: 1. Tooth mass – arch length discrepancy (severe crowding)


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