The phrase "apex of tooth" is correct and usable in written English.
It can be used in dental or anatomical contexts to refer to the tip or point of the root of a tooth.
Example: "The dentist explained that the apex of the tooth is crucial for the health of the surrounding bone."
Alternatives: "tip of the tooth" or "root tip of the tooth".
In this study, DPSCs were isolated from discarded human teeth that were extracted due to aggressive periodontitis (AgP) and divided into three experimental groups (Groups A, B and C) based on the degree of inflammation-induced bone resorption approaching the apex of the tooth root before tooth extraction.
The procedure began when all the scans were taken as preview screen images, a 1.8 mm area was selected approximately 1 mm away from the apexes of teeth, and the molar, premolar, canine, incisor teeth, and tuber regions of maxilla and HU-statistic values were obtained from five different regions of the selected area.
The patient received endodontic treatment (Fig. 4b); there is a puff of root canal cement extruding through the apex of the tooth.
Resorption however rarely compromises the longevity of the teeth.22 Vertical loss of bone through periodontal disease creates a far greater loss of attachment and support than its equivalent loss around the apex of a tooth.
Two identical radiographs were made of each segment (1) before the removal of any additional bone and after (2) the removal of a small amount of the lamina dura at the apex of a tooth, (3) block removal of trabecular bone, and (4) smoothing of the endosteal surface of the external cortex.
At the point of the PDL corresponding to the apex of the tooth root the hydrostatic stresses vanish.
When the apex of the tooth was intact, but a resorption was evident on the root side, the resorption was defined as "middle" resorption.
The values of the above parameters were determined from the condition ε nn ≤1 (in accordance with the first expression of relations (3)) for PDL's points located in the apex of the tooth root.
The bone remodelling would occur uniformly along the root surface during the translational displacement along the x-axis, while beneath the apex of the tooth root the bone would not change.
