Comput. Biol. Med. - Tooth fracture risk analysis based on a new finite element dental structure models using micro-CT data.

Tópicos

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Resumo

The finite element (FE) analysis is an effective method to study the strength and predict the fracture risk of endodontically-treated teeth. This paper presents a rapid method developed to generate a comprehensive tooth FE model using data retrieved from micro-computed tomography (?CT). With this method, the inhomogeneity of material properties of teeth was included into the model without dividing the tooth model into different regions. The material properties of the tooth were assumed to be related to the mineral density. The fracture risk at different tooth portions was assessed for root canal treatments. The micro-CT images of a tooth were processed by a Matlab software programme and the CT numbers were retrieved. The tooth contours were obtained with thresholding segmentation using Amira. The inner and outer surfaces of the tooth were imported into Solidworks and a three-dimensional (3D) tooth model was constructed. An assembly of the tooth model with the periodontal ligament (PDL) layer and surrounding bone was imported into ABAQUS. The material properties of the tooth were calculated from the retrieved CT numbers via ABAQUS user's subroutines. Three root canal geometries (original and two enlargements) were investigated. The proposed method in this study can generate detailed 3D finite element models of a tooth with different root canal enlargements and filling materials, and would be very useful for the assessment of the fracture risk at different tooth portions after root canal treatments.

Resumo Limpo

finit element fe analysi effect method studi strength predict fractur risk endodonticallytr teeth paper present rapid method develop generat comprehens tooth fe model use data retriev microcomput tomographi ct method inhomogen materi properti teeth includ model without divid tooth model differ region materi properti tooth assum relat miner densiti fractur risk differ tooth portion assess root canal treatment microct imag tooth process matlab softwar programm ct number retriev tooth contour obtain threshold segment use amira inner outer surfac tooth import solidwork threedimension d tooth model construct assembl tooth model periodont ligament pdl layer surround bone import abaqus materi properti tooth calcul retriev ct number via abaqus user subroutin three root canal geometri origin two enlarg investig propos method studi can generat detail d finit element model tooth differ root canal enlarg fill materi use assess fractur risk differ tooth portion root canal treatment

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