Implant stability quotient
Encyclopedia
The Implant Stability Quotient (ISQ) is a scale that indicates the level of stability and osseointegration
in dental implant
s. The scale ranges from 1 to 100 and is measured by implant stability meters instruments using RFA
(Resonance Frequency Analysis) technique. The acceptable stability range lies between 55-85 ISQ. 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.
Osseointegration
Osseointegration derives from the Greek osteon, bone, and the Latin integrare, to make whole. The term refers to the direct structural and functional connection between living bone and the surface of a load-bearing artificial implant...
in dental implant
Dental implant
A dental implant is a "root" device, usually made of titanium, used in dentistry to support restorations that resemble a tooth or group of teeth to replace missing teeth....
s. The scale ranges from 1 to 100 and is measured by implant stability meters instruments using RFA
Resonance Frequency Analysis
Resonance Frequency Analysis is a method used to determine stability in dental implants. The stability is presented as an Implant stability quotient value...
(Resonance Frequency Analysis) technique. The acceptable stability range lies between 55-85 ISQ. Higher values are generally found in the mandible than the maxilla
Maxilla
The maxilla is a fusion of two bones along the palatal fissure that form the upper jaw. This is similar to the mandible , which is also a fusion of two halves at the mental symphysis. Sometimes The maxilla (plural: maxillae) is a fusion of two bones along the palatal fissure that form the upper...
. 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.