Our new ibook in Portuguese language is now available at the app store
One of the first studies in the world about dental anatomy described with great details. Prof. Walter Hess 1885-1980
Finally, we have released our IBook version of the Internal Anatomy of human teeth. An interactive atlas of the internal dental anatomy – Free lite version- from the Bauru School of Dentistry, University of São Paulo, Brazil, made possible by the use of microcomputed tomography. This book is available for download on your iPad with iBooks 2 or on your computer with iTunes. To read this book, you must be using an iPad with iBooks 2.
Thanks for visit us!
Maxillary first molars usually present 3 roots. The presence of an additional canal in the mesial root (MB2) has been the subject of several studies that includes the use of histological techniques, microcomputed tomography or by clinical observation through the use of magnifications during the root canal treatment. It is accepted that the use of the operative microscope has resulted in an increase of the detection rate of the MB2 system. Failure to treat and fill this additional canal can lead to failure of the root canal treatment.
The maxillary first premolar is located in the upper jaw. At least 55% of maxillary first premolar present a single root, 41% present 2 roots and 3% presents 3 roots (Pecora et al. 1991). This roots presents deep longitudinal depressions , enlargement of the root canal system for post placement should be performed with caution to avoid accidents.
The maxillary lateral incisor is narrower mesio-distally than the central incisor. This tooth can be variable. Often the tooth is narrow, conical, or peg-shaped. Dental anomalies include the presence of talon cusp, palatogingival groove, dens invaginatus, conical crown or peg-shaped
Dens Invaginatus is an uncommon anomaly of teeth probably resulting from an infolding of the dental papilla during tooth development. The most widely used classification of dens invaginatus has been proposed by Oehlers (1957), who’s described the malformation in three forms:
Type I: an enamel-lined minor form occurring within the conﬁnes of the crown not extending beyond the amelocemental junction.
Type II: an enamel-lined form, which invades the root but remains conﬁned as a blind sac. It may or may not communicate with the dental pulp.
Type III: a form which penetrates through the root perforating at the apical area showing a ‘second foramen’ in the apical or in the periodontal area. There is no immediate communication with the pulp. The invagination may be completely lined by enamel, but frequently cementum will be found lining the invagination.
According Ridell et al. (2001) the Type I is the most prevalent (79%), in sequence Type II (15%) and Type III (5%).
The maxillary central incisor presents commonly one root canal. However, the occurrence of additional canals has been reported. Traumatic injury of the maxillary central incisor is not uncommon in children and adolescents. In 50-70% of trauma cases the maxillary central incisor is affected by fractures that can involve the dental pulp. Common pathological complications after trauma include pulp necrosis, pulp obliteration, dental ankylosis, internal resorption and external cervical resorption.