The success of immediate implant placement with Zero insertion torque

Background: The primary stability in immediate implant placement was considered one of the prerequisites for the achievement of good osseointgration. The insertion torque varies between cases depending on many factors and may goes down to Zero that may affect the prognosis of the implant especially in the soft maxillary bone. The aim of the study was to assess clinically the success&/or failure of immediate flapless implant placement in the maxilla with Zero insertion torque measurement with a follow up time ranging 2-4 years. Results: out of 780 analyzed, fourteen implants were placed in fresh extraction sockets for single rooted teeth in the maxilla and did not get primary stability (zero insertion torque). Their survival rate was 85.7%. Conclusions: The loss of torque during immediate implant placement to Zero may jeopardize the survival of the implants, but it may not be statistically significant with their failure and loss. The lack of certain conditions that are absent during their surgical installation and healing have the major effects on success. The implant primary stability is not an absolute prerequisite to osseointegration; however, it may affect the implant survival rate. Key words: 0 torque implant insertion, implant primary stability, loose implant, immediate implant survival, immediate implant placement.