The authors collaborating with Dr. Daniele Cardaropoli compared the effects of Ridge Preservation versus spontaneous healing in 48 extraction sites in the premolar and molar area1. For Ridge Preservation, Geistlich Bio-Oss® Collagen and Geistlich Bio-Gide® were used.
Same ISQ value in both groups
Only one of all the 24 preserved sockets (4%) needed an additional GBR measure at the time of implant placement, after four months. Implants could be placed unproblematically into the other 23 sockets. By contrast, in the spontaneous healing group 14 out of 24 sockets (58%) had to undergo an additional Guided Bone Regeneration (GBR) at the time of implant placement.
The fact of the implant stability quotient (ISQ) being comparable in both groups (69.96 vs. 70.21 in the RP group), shows the good primary stability that can be achieved by placing an implant into an augmented socket. The clinical success after one year was 100% in both groups. The authors conclude for this reason that "implants inserted in augmented sites have success rates and marginal bone loss comparable to those of implants placed into non-augmented sites. Moreover, the use of a Ridge Preservation procedure during tooth extraction significantly reduces the need for further bone augmentation at the time of implant placement".
- Cardaropoli D, et al.: Int J Periodontics Restorative Dent 2015; 35(5): 677-85.