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Implant stability quotient : ウィキペディア英語版
Implant stability quotient
The implant stability quotient (ISQ) is the value on a scale that indicates the level of stability and osseointegration in dental implants. The scale ranges from 1 to 100 and is measured by implant stability meters instruments using resonance frequency analysis (RFA) technique. The acceptable stability range lies between 55-85 ISQ.〔Sennerby L, Meredith N. Implant stability measurements using resonance frequency analysis: biological and biomechanical aspects and clinical implications. Periodontology. 2000, 2008〕 Higher values are generally found in the mandible than the maxilla. High initial stability (ISQ values of 70 and above) tends to not increase with time, even if the high mechanical stability will decrease to be replaced by a developed biological stability. Lower initial stability will normally increase with time due to the lower mechanical stability being enforced by the bone remodeling process (osseointegration). The overall average ISQ value of all implants over time is approximately 70.〔 If the initial ISQ value is high, a small drop in stability normally levels out with time. A significant decrease in ISQ indicates a potential problem and should be considered an early warning.〔Glauser R, Lundgren AK, Gottlow J, Sennerby L, Portmann N, Ruhstaller P, Hämmerle CH. Immediate occlusal loading of Brånemark TiUnite implants placed predominantly in soft bone: 1-year results of a prospective clinical study. Clin Implant Dent Relat Res.|2003;5 Suppl 1:47-56〕
== References ==



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