Application of multi-slice spiral CT before dental implantation in non-security area of jaw or defected alveolar bone / 第二军医大学学报

ABSTRACT

Objective: To evaluate the shape and texture of the alveolar bones before dental implantation using three-dimension reconstruction techniques by multi-slice spiral CT (MSCT). Methods: Seventeen patients, whose alveolar condition was not clear enough to receive dental implantation, were screened out using conventional dental periapical and panoramic X-ray examination. The occlusion cast was made and a radiological guide template with titanium tube was prepared in the implantation area. The mandibular and maxillary bone was scanned with MSCT. The height, width and density of the alveolar were measured through three-dimensional reconstruction, so as to determine whether the alveolar was suitable for dental implant surgery. Implantation using ITI dental implant system was performed in patients whose alveolar condition met the implantation criteria. Results: Pre-operation MSCT examination indicated that two cases were not suitable for the surgery due to a width of alveolar bone less than 5. 3 mm and a height of the residual bone under the maxillary sinus less than 3 mm. Fifteen patients suitable for the surgery underwent successful implantation. Conclusion: The three-dimensional reconstruction of MSCT images of the jaws can provide more comprehensive and reliable information of the non-security areas and mandibular or maxillofacial alveolar bone defects before implantation.