Abstract: Objective To explore the application of a new improved Leaderguide^TM template in implant surgery for patients with narrow mesiodistal space, and to provide a reference for clinical treatment. Methods Nine patients with single tooth loss, narrow mesiodistal space, and insufficient bone quantity in the mesiodistal direction of the edentulous site were implanted with the LeaderguideTM template. The accuracy of the template was evaluated by measuring the distance between the implant and the mesiodistal adjacent teeth after surgery. Results The use of the Leaderguide^TM template for implant surgery achieved good results. The average distance between implants and the mesial adjacent teeth of all patients after the operation was （1.66±0.10） mm, and the average distance between implants and the distal adjacent teeth was （1.66±0.12） mm. The mesial and distal distances were all larger than the safety recommendation of 1.5 mm. And there was no implant failure and postoperative complications occurred during the follow-up period. Conclusion This case series shows that the Leaderguide^TM template can effectively assist in placing implants in patients with narrow mesio-distal space in the edentulous area.

Key words: Dental implant placement, Prosthodontics - guided implant placement, Narrow mesio-distal space, LeaderguideTM template