Abstract
Background and aims. The aim of this study was to evaluate the predictability of implantation at the time of maxillary
and mandibular molar extraction.
Materials and methods. Maxillary and mandibular molars were extracted with an atraumatic technique (root separation
and careful extraction with a periotome) to preserve all remaining inter-radicular bone. Then, 115 tapered and straight implants
were inserted in extraction sites. Inter-radicular bone was utilized to provide primary stability for the implants. Regenerative
therapy including placement of bone substitute and resorbable membrane, was performed around all the implants.
Results. Four out of 115 implants failed and were removed one month after insertion because of mobility and radiolucency
around the implants. The 7-year cumulative survival rate (CSR) of implants was 96.5%. The maxillary and mandibular 7-year
CSRs were 92.7% and 98.6%, respectively.
Conclusion. The combination of atraumatic extraction of hopeless molars, immediate implant placement and concomitant
regenerative therapy is a predictable surgical procedure, affording implant stability for restoration with a single crown