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Sutalo J, Njemirovskij V.
Marks were made with a carborundum disc on the stub surface to allow for identification of each specimen individually on the screen. The rationale was that the transparent specimens used by Vertucci 20 do not fit for radiographic assessment. The alveolar process is responsible for the implantation of the mandibular teeth, is characterized by eight bilateral sockets formed by the anterolateral and funncional bone walls, and is separated by independent bone septa.
The latter, as funcionap maxillofacial modality, has the advantage of achieving high-resolution three-dimensional images. How to cite this article. When roots bifurcated in the apical third, the specimens had one single buccal canal up to the point of bifurcation and two distinct canals from that point on.
Five hundred periapical radiographs of the mandibular molar region were selected and evaluated for the presence or absence of anaotmia oblique line.
The authors state that there are no financial and personal conflicts of interest that could have inappropriately influenced their work. All of the unidentified radiographs were placed in plastic assemblies to be analyzed on the same viewer with the aid of a 3x magnifying glass.
Anatomia odontologica / Dental Anatomy : Mario Eduardo Figun :
Root canal treatment of this tooth is difficult because of the direction and longitudinal depression of its roots, the different con figurations of the pulp chamber and the difficulty in visualizing the apex on radiographs 1.
The maxillary 1st premolar may present a large number of anatomic variations. The root canal system is a part of the tooth that cannot be directly visualized by the dentist. The evolution and application of the dental maxillofacial imaging modalities.
Many teeth exhibited a great number of easily identifiable small-sized foramina, which were not considered in the study. Anatomia, embiologia e histologia bucal.
As far as we could ascertain, only one study 16 has described the presence of sulcus or bifurcation in the roots of maxillary 1st premolars as a variation of the internal anatomy.
However, it is sometimes projected at the cervical third and can even overlap the alveolar crests, complicating the interpretation of periodontal disease 5. The photomicrographs illustrate teeth with two apical foramina originated from two root canals Fig. Unsuccessful endodontic treatment of maxillary 1st premolars may be associated with a second canal funcionla the buccal root being overlooked and hence not accessed, prepared and obturated.
Primeiro molar superior – Wikipédia, a enciclopédia livre
In the posterior region of the mandible the attachment of the alveolus to odontolgica bone becomes evident by the presence of an elevation known as oblique line. April 28, Accepted: SEM revealed the presence of only 1AF after a complete scanning of the entire root surface. For the other three specimens, it was possible to identify the existence of two root canals fiyun to a certain point along the root length, but the number of qnatomia foramina could not be determined radiographically Fig.
Projection of the oblique line in periapical radiographs of mandibular molars. The oblique line is considered a reinforcement and dissi- pation line of the mandible efforts. Better prognoses in endodontic treatment can only be achieved if dentists have thorough knowledge of the internal anatomic configuration of teeth.
Figun garino anatomia odontologica funcional aplicada arborvitae
However, 55 radiographs There are also anatomical landmarks of great relevance for the study of dentoalveolar anatomy, such as the mental eminence, lingual foramen, geniohyoid processes, mental foramen, part of mandibular canals which is split into the incisive canals starting at the mental foramenoblique lines, mylohyoid line, submandibular foveas and retromolar spaces.
SEM identified a smaller number of apical foramina than radiographs in 5. This occurs due to the overlap of anatomic structures, such as the mental protuberance, mental foramen, submandibular fovea, mylohyoid line, and oblique line.
Radiographs are helpful for the visualization of root anatomy, but are limited because they provide two-dimensional images of a three-dimensional object 6, The purposes of this study were to assess radiographically the number of canals of the buccal root of maxillary 1st premolars with longitudinal buccal sulcus, and to compare the number of apical foramina AF found on radiographs to that revealed by scanning electron microscopy SEM.
Teeth with partially or totally calcified root canals were excluded from radiographic examination. Regarding the variability of the anatomic structures, it is known that these vary in shape, size, and position in different individuals, as well as within the same individual bilaterally the left side vs.
Most of the specimens Results The obtained results showed that the oblique line was detected in radiographs, representing The roof of the pulp chamber was completely removed and access to the root canals was obtained without touching the floor of the chamber. Rev Odonto Cienc ; Initially, the simple presence or absence of an oblique line was assessed. Conclusions Considering the results obtained in the present study, it is possible to affirm that the overlap of the oblique line over the alveolar crest images in the mandibular molar region represented a significant part of the analyzed sample.
To identify and quantify the frequency of the projection of the oblique line over the alveolar crests of the mandibular molars in periapical radiographs.