Abstract: Objective： To introduce the feeling and experience of "four-handed operation"nursing cooperation during implant-supported restoration using 3shape Trios oral scanner. Methods： The experimental group was four-handed operation group, and the doctor installed a Ti-base on the implant. The patient's denti- tion and soft tissue were scanned with a 3shape Trios oral scanner. The CAD/CAM software was used to design and manufacture the implant-supported restoration while the control group did not use four-hand- ed operation. 3shape design software was used, the treatment duration and patient-related satisfaction evaluation were compared in between these two groups. Results： The satisfaction of patients with intraoral scanning model was significantly higher in the experimental group than in the control group(p<0.05),and the treatment time was shorter in the experimental group than in the control group. Conclusion： To master the operation steps of 3shape Trios intraoral scanning, and to carry out the four-handed operation more closely with the dentist play an important role in improving the accuracy of dental implant and patients’ satisfaction. The four-handed operation improves the patients’atisfaction and makes the treatment more effective. It also improves the operating efficiency and reduces the operating time.

Key words: four-handed operation, intraoral scanning, dental implant, patients’satisfaction;