protostylid

pro·to·sty·lid

(prō'tō-stī'lid)
An accessory cusp found on the buccal surface of the mesiobuccal cusp of lower molars, ranging from a small groove to a cusp rivaling the mesiobuccal cusp in size.
[proto- + G. stylis, -idos, mast, spar]

pro·to·sty·lid

(prō'tō-stī'lid)
Accessory cusp found on buccal surface of mesiobuccal cusp of lower molars, ranging from a small groove to a cusp rivaling the mesiobuccal cusp in size.
[proto- + G. stylis, -idos, mast, spar]
References in periodicals archive ?
Protostylid is an additional enamel elevation, characteristically located on the mesial half of the buccal surface of the lower molars that arises mesio-occlusally from the gingival end of the buccal groove (Dahlberg, 1950; Bolk, 1916; Dahlberg, 1963).
The protostylid, mesostylid and metastylid are prominent.
Protostylid trait in deciduous and permanent dentition in Icelanders.
The protoconid is oval in shape supported by robust protostylid which is seriated.
The most common features were the shovel-shaped central and lateral incisors, high frequencies of the groove and fossa forms of Carabelli's cusp, the metaconules, the Y6 cusp pattern, layered fold, protostylid and cusp 6.
By studying Amazonian populations belonging to ethnic groups (ticuna, huitoto, and cocama), Aragon et al (2008) have described the presence of winging, central and lateral shoveled incisors, high frequency Carabelli's cusp sulcus and fossae, Y6 or Y7 cusp pattern, deflecting wrinkle, protostylid, and cuspid 6.
More specifically, winging of the central maxillary incisors, and peg shape and congenital absence of the maxillary third molar generally increase through time among the samples, while the protostylid of the mandibular first molar also increases through time among some of the Azapa Valley samples.
The protostylid and parastylid are pillar-like in appearance.
0 was later used to determine the correlations of these CMDTs: shovel-shaped incisors (11 versus 12, 21 versus 22, FDI notation), Carabelli's cusp (16 versus 17, 26 versus 27, FDI notation), cusp pattern (36 versus 37, 46 versus 47, FDI notation), cusp number (36 versus 37, 46 versus 47, FDI notation), cusp 6 and cusp 7 (36 versus 37, 46 vs 47, FDI notation), and protostylid (36 versus 37, 46 versus 47, FDI notation) by means of the Spearman non-parametric correlation test.
Zoller LM Protostylid Expresion dicotomica 2-7/0-7 Grados Masculinos Femeninos Total (%) 0 16 22 19 1 78 74 76 2 2 0 1 3 4 2 3 4 0 0 0 5 0 2 1 6 0 0 0 7 0 0 0 Cuadro 5 Patron Cuspideo Denticion Temporal (lm2) Metodo de Sciulli Grados Masculinos Femeninos Total (%) Y 80 82 81 + 16 18 17 X 4 0 2 Cuadro 6 Patron Cuspideo Denticion Permanente (LM1) Sistema ASU Grados Masculinos Femeninos Total (%) Y 54 28 41 + 46 72 59 X 0 0 0 Cuadro 7 Frecuencias (%) de los RMDC en Denticion Decidua * Cuspide de Protostilido Patron Carabelli Cuspideo Ja.
Objectives: To assess the frequency and variability of eleven non-metric dental crown traits (winging, shovel-shape, double shovel shape, Carabelli trait, deflecting wrinkle, protostylid, groove pattern, cusp number, sixth and seventh cusps) in permanent (UI1/UI2/UM1/LM1) teeth, in order to understanding the ethnic influence and the biological distance of the sample in study.
The shallow vertical groove separating the protoconid from the protostylid is present antero-labially.