2021年9月12日 · Unusual trifurcation on a maxillary premolar. Three views of a maxillary right first premolar with a normal-looking crown but with three roots: two buccal and one lingual root (mesiobuccal, distobuccal, and lingual). These roots somewhat resemble those …

Molariform second premolar is a rare dental anomaly where the second premolar resembles a molar in size and shape. This condition is often linked to macrodontia, a rare enlargement of teeth that disrupts dental proportions and can manifest in isolated, relative, or generalized forms.

To evaluate the mean dimensions and morphologic characteristics of mandibular premolars that had mesiodistally elongated and faciolingually squeezed tooth shape deviations (MnP-TSD) and determine the population prevalence of this anomaly. Clinical ...

2006年9月1日 · An extreme variation, called here MnP tooth-shape deviation (MnP-TSD), is characterized by a squeezed faciolingual (FL) dimension and an enlarged mesiodistal (MD) dimension, reversing the typical premolar proportions. …

2015年1月12日 · The dens evaginatus is a developmental anomaly that manifests clinically as an extra cusp appearing on the occlusal surface of premolar teeth between the buccal and lingual cusps . This projection of enamel can interfere with tooth eruption and occlusion.

2013年7月24日 · Tooth agenesis is the most common human dental anomaly.1 The human mandibular second premolar (MnP2) is highly variable developmentally and has been proven to be the most frequently absent tooth type, excluding third molars, in certain populations.1,2

1976年3月1日 · Further examples are reported of an anomaly of the mandibular second premolar which may best be described by the term ‘molarization’. The aetiology of the condition is discussed, and attention is drawn to the clinical significance of the fact that these anomalous premolars may mimic the first deciduous molar in the morphology of the crown ...

Gemination, specifically, is identified as a tooth shape anomaly wherein a single tooth germ attempts to divide through invagination, resulting in a large tooth with a bifid crown, typically possessing a single root and root canal. Despite this anomaly, the tooth count remains normal when affected tooth is considered as one unit.

Results: The results indicated a 9.5° decrease in the distal angle and a 13.2° increase in the premolar-molar angle for the unerupted MnP2 in the agenesis sample. This was a highly statistically significant difference (P < .001 and P < .0001, respectively) compared with the MnP2 inclinations in the control sample.

2017年10月12日 · Including the anomaly in the root and canal coding system provides more detailed information on the morphological characteristics of a given tooth, thus allowing proper diagnostic procedures and appropriate treatment planning. Including the anomaly subtype is advantageous as they usually require different treatment protocols.