Aim. The aim of this work is to describe a case of immediate implant placement after extraction of the upper right first premolar, with the use of CAD/CAM technology, which allows an early digital impression of the implant site with an intraoral scanner (MHT 3D Progress, Verona, Italy). Case Report. A 46-year-old female was referred with a disorder caused by continuous debonding of the prosthetic crown on the upper right first premolar. Clinically, there were no signs, and the evaluation of the periapical radiograph showed a fracture of the root, with a mesial well-defined lesion of the hard tissue of the upper right first premolar, as the radiolucent area affected the root surface of the tooth. It was decided, in accordance with the patient, that the tooth would be extracted and the implant (Primer, Edierre implant system, Genoa, Italy) with diameter of 4.2 mm and length of 13 mm would be inserted. After the insertion of the implant, it was screwed to the scan abutment, and a scan was taken using an intraoral scanner (MHT 3D Progress, Verona, Italy). The scanned images were processed with CAD/CAM software (Exocad DentalCAD, Darmstadt, Germany) and the temporary crown was digitally drawn (Dental Knowledge, Milan, Italy) and then sent to the milling machine for production with a composite monoblock. After 4 months, when the implant was osteointegrated, it was not necessary to take another dental impression, and the definitive crown could be screwed in. Conclusion. The CAD/CAM technology is especially helpful in postextraction implant for aesthetic rehabilitation, as it is possible to immediately fix a provisional crown with an anatomic shape that allows an optimal healing process of the tissues. Moreover, the removal of healing abutments, and the use of impression copings, impression materials, and dental stone became unnecessary, enabling the reduction of the chair time, component cost, and patient's discomfort. However, it is still necessary for scientific research to continue to carry out studies on this procedure, in order to improve the accuracy, the reliability, and the reproducibility of the results.
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机译：目标。这项工作的目的是描述使用CAD / CAM技术提取右上第一前磨牙后立即植入种植体的情况，该技术可以通过口腔内扫描仪对种植体部位进行早期数字化印模（MHT 3D Progress ，意大利维罗纳）。案例报告。一名46岁的女性因右上第一前磨牙上的义齿冠不断脱粘而引起的疾病。临床上没有任何迹象，根尖周片的评估显示出根部骨折，右上第一前磨牙的硬组织有近中清晰可见的病变，因为射线可透区域影响牙齿的根部表面。根据患者的决定，将拔出牙齿并插入直径为4.2毫米，长度为13毫米的植入物（Primer，Edierre植入系统，意大利热那亚）。插入植入物后，将其拧到扫描基台上，然后使用口内扫描仪（MHT 3D Progress，意大利维罗纳）进行扫描。扫描的图像用CAD / CAM软件处理（Exocad DentalCAD，德国达姆施塔特），数字化绘制临时牙冠（Dental Knowledge，意大利米兰），然后将其发送到铣刨机上，用复合一体成型机进行生产。 4个月后，将植入物与骨整合后，就无需再进行牙科压印，并且可以拧紧确定的牙冠。结论。 CAD / CAM技术在拔牙后植入物中进行美学修复特别有用，因为可以立即固定具有解剖形状的临时牙冠，从而实现组织的最佳愈合过程。而且，不需要去除愈合基台，也不需要使用压印帽，压印材料和牙结石，从而减少了椅子时间，部件成本和患者的不适感。但是，科学研究仍需要继续对该程序进行研究，以提高结果的准确性，可靠性和可重复性。
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