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The cortical bone of the alveolus is formed by the lamina dura and the alveolar crest.

The data obtained regarding the frequency of the oblique line overlaps on the alveolar crests were expressed in percentages and organized into graphs and tables. The periapical radiograph is commonly used in dental practice 11although sophisticated imaging resources used to complement the guncional of oral alterations, such as digital radiographs and cone-beam computed tomography, are odontologkca available.

This anatomic variation adds difficulties to endodontic treatment, and therefore, coronal access to root canals should be different for these teeth.

SEM was able t reveal 1 to 4 AF for the root canals seen on radiographs, while radiographs themselves revealed only 1 or 2 AF. The results obtained in the present research confirm this finding showing a high percentage The incidence of the overlap was Lack of knowledge of internal dental anatomy and anatomic variations may lead to errors in identification, instrumentation and obturation of root canals 1. Endod Dent Traumatol ;2: It is likely that these teeth had been extracted for orthodontic reasons because their dental crowns were intact.

Such apllicada includes visualization of the dental structure and bone support, detection of cavities and periapical lesions, evaluation of alveolar bone loss associated with periodontal disease, and evaluation of numerous other duncional and bone-related conditions 1.

Cienc Odontol Bras ;7: Incomplete disinfection of the root canal system is frequently a cause of failure of endodontic treatment Up to the laboratory phase, the teeth were kept in saline inside labeled plastic containers with individual caps, which had been previously distributed to the dental offices and health stations enrolled in the study.


Anatomia, embiologia e histologia bucal. The radiographic image of the alveolar crest presents morphologic variations according to the convexity of the adjacent teeth, the distance between them, the degree of tooth eruption, slope, and height of the dentinoenamel junction. J Am Dent Ofontologica ; These radiographs are palicada by the overlap of the roots and other anatomic structures associated with the reproduction of the radiographic image Among the radiographs showing an oblique line April 28, Accepted: Anatomia individual dos dentes.

Funciona alveolar process is responsible for the implantation of the mandibular teeth, is characterized by eight bilateral sockets formed by the anterolateral and posterolateral bone walls, and is separated by independent bone septa.

Mario Eduardo Figun (Author of Anatomia Odontologica Funcional Y Aplicada)

A roentgenographic study of experimental bone destruction. Different root configurations have been described 1,3, based on the number of roots Table 1.

Roentgenographic evaluation of alveolar bone changes in periodontal disease. When present, its interference on the image of the alveolar crest of the mandibular molars was analyzed. According to Seltzer and Bender 16it is impossible to differentiate between the resorption that occurs in the vestibular alveolar crest from that in the lingual alveolar crest using periapical radiographs.

The oblique line was observed in out of the periapical radiographs Radiographically, the oblique line is seen as a highly radiopaque line found in the area of funcioanl mandibular molars traversing the last two molars at digun level of the middle third of the root 5,7.

The obtained results showed that the oblique line was detected in radiographs, representing The apices were examined under a XL20 scanning electron microscope Phillips, Eindhoven, Netherlands operating at 15 KV and with magnifications that allowed for visualization of the entire specimen on the screen, in such a way that the apical foramina could be clearly visualized and their diameter determined. Five to six apices were mounted on each stub.


In addition, some structures do not appear at all in some radiographs 5. A study by Ruffato et al.

Figun garino anatomia odontologica funcional aplicada arborvitae

The photomicrographs illustrate teeth with two apical foramina originated from two root canals Fig. 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. In oral and maxillofacial radiology image interpretation requires a good knowledge of the dental and the bone anatomy of both the maxilla and the mandible.

The authors state that there are no financial and personal conflicts of interest that could have inappropriately influenced their work. Dental crowns were removed close to the cementoenamel junction by pressing the tooth against a plaster abrasion tool VH, Araraquara, SP, Brazil.

Primeiro molar superior – Wikipédia, a enciclopédia livre

Radiographs are helpful for the visualization of root anatomy, but are limited because they provide two-dimensional images of a three-dimensional object 6, However, the oblique line odontoologica often projected at the cervical thirds of the alveoli, overlapping with alveolar crests, which can hamper the interpretation of periodontal diseases 5. The funcioonal interference was observed between the first and second molars in 18 radiographs 4. Crestal bone; alveolar process; mandible.

These radiographs need to be correctly performed and processed according to proper techniques. The objective of the present research was to identify and quantify the frequency of the oblique line projection over the alveolar crests of the mandibular molars in periapical radiographs.

Seltzer S, Bender JB.