Method for manufacturing oral implant positioning guiding template based on CBCT data

Abstract

The invention discloses a method for making oral implant positioning guiding template based on CBCT data. The method comprises the steps: 1) scanning patient jaw bones through CBCT to mainly obtain jaw bone three-dimensional anatomic structure information of a implant region; 2) analyzing and processing CBCT data; 3) using the processed CBCT data to reconstruct a three-dimensional jaw bone model; 4) processing the reconstructed three-dimensional jaw bone model; 5) designing an oral implant positioning guiding template based on the three-dimensional jaw bone model; and 6) carrying out rapid prototype processing; Amount of influence data is effectively reduced through carrying out resampling, anisotropic diffusion filtering to original image data obtained through CBCT scanning, carrying out volume rendering through a ray-casting method, and noise of the data is further removed, thereby accurate reconstruction of the three-dimensional jaw bone model is guaranteed. Furthermore, accuracy of manufacturing the oral implant positioning guiding template is substantially improved through removing model fragments caused by image artifact and non-implant region models in the process of three dimensional jaw bone model reconstruction.

Description

technical field [0001] The invention relates to a method for making a positioning and guiding template, in particular to a method for making a positioning and guiding template for oral implantation based on CBCT data. Background technique [0002] CBCT, that is, cone beam CT (Cone Beam Computer Tomograph cone-beam projection computer reconstruction tomography equipment), since its clinical application, it has been increasingly used in various disciplines of oral clinical specialty, and it is widely used in large and medium-sized Dental clinics play an increasingly important role in hospitals and dental clinics. [0003] Compared with traditional CT, the radiation dose of CBCT is extremely low. Compared with traditional multi-slice spiral CT, the radiation dose of CBCT is only equivalent to 1 / 30-1 / 40 of traditional CT radiation dose, equivalent to only 4 The radiation dose of sub-digital tomographic projection, an American research report pointed out that the dose of a CBCT ...

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Problems solved by technology

[0008] However, since CBCT is different from traditional CT in its imaging method and imaging principle, the data volume of CBCT is larger than that of traditional CT, which will affect the computer’s response speed in the subsequent 3D model reconstruction and guidance template production process, and even There is a problem that the 3D reconstruction cannot be performed normally

In addition, the imaging principle of CBCT makes the image produced by CBCT have more artifacts than traditional CT, the soft tissue imaging quality is not ideal, and the linear response of the data field is not uniform, which leads to a lot of fragments in the reconstructed 3D model, which affects the guidance. Template making

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