Avaliação das foraminas de dentes ântero-superiores em ápices radiculares com e sem apicetomia / Evaluation of apical anatomy in maxillary anterior root apices with or without apicoectomy

AUTOR(ES)

Tatiana Santos Assumpção

DATA DE PUBLICAÇÃO

2009

RESUMO

The aim of apical surgery is to remove the root canal system ramifications, to Access to the root canal and place an apical seal. This ex vivo study evaluated the root apex topography of maxillary anterior teeth. The influence of the root end resection level to remove the acessory foramina was also assessed. Fifty maxillary anterior teeth were evaluated using an operating microscope (OM), at a magnification of 32x and the number of apical foraminal opening was recorded. Then, the roots were prepared for scanning electron microscope analyses (SEM), at a magnification of 35x. The shape, diameter, location and distance between the apical foramen and anatomical apex were evalueted in the photomicrographes. The number of accessory foramina was investigated using both OM and SEM, and these analyses were compared. After this procedure, the root apices were sectioned using na Isomet saw at the lowest speed setting and continuous water at 1 mm from the anatomical apex with 0º bevel. The specimens were prepared for SEM evaluation. In this stage, the number of extra foramina in the apical segment were registered. This procedure was repeated at the 2 and 3 mm level and the percentage of root canal ramifications removal was tabulated. The central position of major apical foramen was found in the incisor group and the distobuccal position was found in the canine group. The mean of the distance between apical foramen and anatomical apex were 0,85 mm. The mean of the narrow and wide apical foramen diameters was 0,38 and 0,29 mm. The most common foramen shape was oval, whilst in the accessory foraminas was round. The highest frequency of acessory foramina was observed in the canine group. All the accessory foramina were located until 1,5 mm from anatomical apex and the mean of the narrow and wide diameters were between 0,06 and 0,17 mm. The operating microscope was able to identify 77% of the existing foramens. The apicoectomy was capable to remove 100% of existing accessory foraminas of the central incisors at the 1 mm level, whilst in the lateral incisors and canines was necessary a 3 mm level.

ASSUNTO(S)

tooth apex apicoectomy apicectomia endodontia anatomia Ápice dentário anatomy endodontics

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