In this situation described above, our experience with several cases has almost always led us to indicate this resorption as being part of the lesion or disease called “occlusal trauma”, with late manifestation of months and years of progression and preceded by other manifestations, which we will discuss next. Analyzing the maxillary canines between 8 -10 years old can prevent this situation (the patient was a 31-year-old woman with a history of previous orthodontic treatment). In B.1, C.2, D.1 and E.2, sagittal tomographic images of the lateral incisors can be seen. In this case, the 3D tomographic images highlighted the bilateral resorptions in the vestibular ( A, B.2 and C.1) and palatal ( D.2 and E.1) views, representing two advanced occlusal trauma lesions. Inflammatory root resorption in lateral maxillary incisors, when they have acted as a laterality guide for a long time this can occur unilaterally or bilaterally. Two factors contribute to the greater possibility of eruption disorders in maxillary canines: For other jaw problems, this examination of the jaws and teeth should be done when the patient is six years old. At this time, the spatial relationship with the other teeth and its position in the maxilla is established. To know the exact position of the maxillary canine, panoramic and periapical radiographs are necessary, as well as tomographic images, including 3D images of the maxilla. Before nine years of age, no permanent tooth will have undergone complete development of its root. The ideal is to know where the maxillary canines are when the patient is between 8-10 years old, after a consultation with the pediatric dentist and/or the orthodontist. The absence of maxillary and mandibular canines due to partial anodontia is very rare. Many people have a smaller jaw, with lack of space for all the teeth, thus requiring orthodontic and orthopedic corrections performed by specialists. Almost always, the canine that failed to appear is inside the bone, unerupted, or it has erupted and is in an inappropriate position. The lack of space to accommodate the canines changes the shape and volume of the dental arch, and is capable of generating asymmetries expressed in the smile, such as ungraceful laughter. How can the lack of eruption, disturbances in position and even loss of canines be prevented? These frequent problems occur because the canine is the last tooth to occupy its place in the dental arch, with the exception of the third molars. WHERE IS THE CANINE? PREVENTIVE MANAGEMENT The maxillary canines prevent the upper lip from drooping and accentuating the nasolabial fold, thanks to their proximity to the piriform aperture. In patients without one or both the canines, the role of the canine in esthetics and facial aging is highlighted. Canines prevent the appearance of premature facial aging, by preserving the nasal shape and volume of the upper lip. The wing of the nose and the nasolabial fold are very important in the esthetics of the face. The bulging bone of the canine prominence on the buccal surface of the maxilla supports the upper lip, giving the nasolabial fold an appearance of filling. Anatomically, the root and periodontal tissues of the maxillary canine are located below the wing of the nose. The roots of the maxillary canines and the surrounding bone physically support the wing of the nose and upper lip, without revealing the nasolabial groove, which descends to the corner of the mouth, or commissure. But canines are much more than corners of the arches. In the mouth, the same occurs with the canines, which guide and determine the paths of food, chewing and the lateral openings of the mouth, sparing and preserving the TMJ. By analogy, street corners in cities are very important in the flow of people, in the logistics of cars and in the esthetics of metropolises. In humans, canines are outstanding, although they are still smaller than they are in animals.Ĭanines are the corners of the dental arch. The large conical crowns, with long, wide roots, supported in the maxilla by a very dense bone, allowed the animal to shake its neck repeatedly, a strategy used to kill the prey. John Hunter in the UK denominated the teeth, nearly 300 years ago except for the canines, which were already named, and they were also known as fangs - especially in wild beasts, which used them to seize their prey, by fixing these fangs in their flesh.
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