The right second premolar had a minimal class II composite restoration, the left first premolar
had a cast post and core, and the left second premolar and second molar were missing.
In this study, it is evident that the teeth length values decreased from the first premolar
to the third molar in both the arches.
He was diagnosed with an oral cutaneous sinus associated with a non-vital lower left first premolar
. Pulp extirpation was undertaken and with completion root canal treatment by the dental practitioner.
The evolutionary characteristic of the mandibular first premolar
is single-rooted in most human populations.
The aim of this trial was to evaluate the rate of canine retraction in maxillary first premolar
extraction patients with or without flapless cortical perforations (FCPs) made with a miniscrew.
Camouflage treatment is mainly based on the retraction of the upper incisors by extracting the upper first premolars
or whole maxillary arch distalization using temporary anchorage devices and protraction of the lower incisors to resolve increased overjet (8-14).
Various studies have evaluated the number of canals in the maxillary premolars.4,9,25,26,30,31 The number of canals in maxillary first premolars
are reported in the following range: single canal (2.1-17.7%), two canals (85-96%) and three canals (1.2-9.2%).4,9,25,26,30,31 In our study, the proportion of a single canal in maxillary first premolar
was 6(5.2%), two canals and three canals were 102(89.6%) and 6(5.2%), respectively.
Maxillary first premolars
would be extracted for anterior retraction, and the anterior crossbite would be corrected with a mandibular setback.
The cystic lesion enclosed the left mandibular canine and first premolar
which were impacted and displaced.
extraction effects on upper airway dimension in bimaxillary proclination patients.
In a study by Lo and Moyers,14 the most favorable sequence of eruption to obtain a normal molar relationship was as follows: first molar, central incisor, lateral incisor, first premolar
, second premolar, canine, second molar in the maxilla and first molar, cen- tral incisor, lateral incisor, canine, first premolar
, second premolar, second molar in the mandible.