Dental implants stability measurements and initial bone loss in single implants

Objectives: The purpose of this prospective study is to measure with non-invasive methods long term implant stability, using ® Periotest.
Measuring PTVs (Periotest values) and its relation to radiographic measurement of bone loss with correlation to implant location: Maxilla or Mandible, in the anterior or posterior of the jaw.
Methods: Subjects were enrolled through students at School of Dental Medicine in Tel-Aviv University, who were in need of one or more single implants replacing missing teeth with Single FPD or RPD, edentulous for at least 4 months at study site and in no need for bone augmentation.

Students prepare CT diagnostic template based on mockup of final crown and was utilized as surgical guide at implant insertion.

Clinical data, PTV values and Periapical radiographs was collected at:
1)Initial implant placement, with the use of a transfer immediately after insertion.
2) Implant exposure if required or at 3-6 month after insertion.
3) 1 year after implantation with final restoration.
Patient information was collected, relating to age, sex, health status and habits.
Results: 32 implants were included in the study. Statistical analysis were done for 16 implants at 1-year follow-up. Significant correlations were found for PTV at 1-year follow-up (p<0.01) and at implant exposure (p <0.05).
More bone loss was observed in the mandible, with no correlation found between age, sex and bone loss.
Conclusions: These initial results support the assumption that ® Periotest could be a useful tool for implant stability and bone assessment.