All teeth are arranged at an angle to the occlusal plane and each has an optimum inclination mesiodistally
to best perform its individual and collective functions.
Upper right central incisor-11 showed complicated crown and root fracture (Chisel fracture) with pulpal involvement, tender on percussion with crown vertically split mesiodistally
, extending subgingivally.
Goldberg et al (22) reported limitations of the buccolingual radiographic views to detect the voids, and concluded that adding a mesiodistally
directed radiographic view is more appropriate for this purpose.
In other words, it would relate the canine to the neighboring teeth both mesiodistally
The usual presentation is in the mandible and with a lateral radiolucency, and the entity spreads mesiodistally
and has minimal buccolateral swelling (5, 6).
The tooth base is trapezoidal in shape, extended mesiodistally
, with short lingual and acuminate lateral parts.
The OPG demonstrated a fully dentate patient with a moderately defined radiolucency extending mesiodistally
from the mesial root of #37 to the mesial aspect of #38 and also inferiorly to the lower border of the mandible (Figure 4).
Twenty-five extracted human maxillary central incisors were selected after being radio-graphed buccolingually and mesiodistally
. Inclusion criteria were as follows: single straight root canal, completely formed apex with patent foramina, no obstruction within canal system, and no evidence of internal and/or external resorption.
oriented fractures are not visualized directly in a typical radiographic examination.
The sector containing the first molar was embedded in paraffin, and 7 m sections of each first molar oriented mesiodistally
were obtained and stained with H&E.
This technique consists of beheading the crown of the compromised tooth and then sectioning the root mesiodistally
; the palatal portion of the root is then extracted, leaving in situ the buccal portion, directly in contact with the buccal bone plate .
Mandibular central incisors were chosen for this study as their roots are narrower mesiodistally
, they have lesser dentin thicknesses, and their root canals have oval cross sections, all of which make these teeth most susceptible to vertical root fracture .