Resonance frequency analysis of dental implant stability during the healing period.

Boronat A; Balaguer J; Lamas J; Carrillo C; Peñarrocha M.
Med Oral Patol Oral Cir Bucal, 2008; 13(4):244-7.


Purpose: The objective of the present study was to measure the implant stability quotient (ISQ) values during the
osseointegration period, and determine the factors that affect implant stability. Materials and Methods: To measure
implant stability, resonance frequency analysis (RFA) was performed in 24 patients (12 women, 12 men) with a total
64 Defcon® implants (10 anterior maxilla, 12 posterior maxilla, 18 anterior mandible, 24 posterior mandible). Bone
type was classified according to the Lekholm and Zarb index (52 type II bone, 12 type III). RFA was used for direct
measurement of implant stability on the day of implant placement and consecutively once a week for 8 weeks and at
week 10. Results: The mean ISQ of all measured implants was 62.6. The lowest mean stability measurement was at 4
weeks for all bone types (60.9). Gender was found to be significant (p<0.05); women showed higher implant stability
than men. In relation to location within the dental arch, statistical analysis showed higher ISQ values for anterior
implants than posterior fixtures (p<0.05).

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