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Resonance Frequency Analysis
Resonance frequency analysis (RFA) is a method used to determine stability (the level of osseointegration) in dental implants. The stability is presented as an implant stability quotient (ISQ) value. The higher the ISQ value the higher the stability. Utilizing RFA involves sending magnetic pulses to a small metal rod temporarily attached to the implant. As the rod vibrates, the probe reads its resonance frequency and translates it into an ISQ value. RFA measurements are used to assess the stability of the implant immediately after placement, as well as to measure the stability during the healing time. This helps the dentist determine if further healing time (osseointegration) is needed before the prosthetic tooth is attached, as well as to identify at-risk patients with compromised bone tissue, or other risk factors. History Resonance frequency analysis was first suggested as an alternative method of analyzing peri-implant bone in a scientific paper by Meredith N et al in 1996. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dental Implant
A dental implant (also known as an endosseous implant or fixture) is a prosthesis that interfaces with the bone of the jaw or skull to support a dental prosthesis such as a crown, bridge, denture, or facial prosthesis or to act as an orthodontic anchor. The basis for modern dental implants is a biologic process called osseointegration, in which materials such as titanium or zirconia form an intimate bond to bone. The implant fixture is first placed so that it is likely to osseointegrate, then a dental prosthetic is added. A variable amount of healing time is required for osseointegration before either the dental prosthetic (a tooth, bridge or denture) is attached to the implant or an abutment is placed which will hold a dental prosthetic/crown. Success or failure of implants depends on the health of the person receiving the treatment, drugs which affect the chances of osseointegration, and the health of the tissues in the mouth. The amount of stress that will be put on the impla ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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, with higher values indicating greater stability. The acceptable stability range lies between 55 and 85 ISQ.Sennerby L, Meredith N. Implant stability measurements using resonance frequency analysis: biological and biomechanical aspects and clinical implications. Periodontology. 2000, 2008 ISQ values are obtained using resonance frequency analysis (RFA). Higher values are generally found in the mandible than the maxilla The maxilla (plural: ''maxillae'' ) in vertebrates is the upper fixed (not fixed in Neopterygii) bone of the jaw formed from the fusion of two maxillary bones. In humans, the upper jaw includes the hard palate in the front of the mouth. The t .... 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 repla ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Osseointegration
Osseointegration (from Latin ''osseus'' " bony" and ''integrare'' "to make whole") is the direct structural and functional connection between living bone and the surface of a load-bearing artificial implant ("load-bearing" as defined by Albrektsson et al. in 1981). A more recent definition (by Schroeder et al.) defines osseointegration as "functional ankylosis (bone adherence)", where new bone is laid down directly on the implant surface and the implant exhibits mechanical stability (i.e., resistance to destabilization by mechanical agitation or shear forces). Osseointegration has enhanced the science of medical bone and joint replacement techniques as well as dental implants and improving prosthetics for amputees. Definitions Osseointegration is also defined as: "the formation of a direct interface between an implant and bone, without intervening soft tissue". An osseointegrated implant is a type of implant defined as "an endosteal implant containing pores into which oste ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Osstell AB
Osstell AB is a company headquartered in Gothenburg, Sweden that develops, manufactures, and sells devices and accessories used to measure dental implant stability. It was founded in 1999 with the aim of developing and commercializing a device that utilized resonance frequency analysis (RFA) to determine the level of stability of a dental implant. Patented technology In a dental implant procedure, a hole is drilled into the jawbone and a titanium implant is inserted. If and when the implant has proven to be stable in the jawbone, a prosthetic tooth is then affixed to the implant. Osstell’s patented RFA device (the most recent generation called Osstell IDx) helps dentists assess the stability of the implant, without having to physically disturb it. A small aluminum rod, called a SmartPeg, is placed in the implant. The RFA device prompts vibration in the rod by initiating magnetic pulses of varying frequencies. The RFA device detects the resonance frequency of the rod (called Sma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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, with higher values indicating greater stability. The acceptable stability range lies between 55 and 85 ISQ.Sennerby L, Meredith N. Implant stability measurements using resonance frequency analysis: biological and biomechanical aspects and clinical implications. Periodontology. 2000, 2008 ISQ values are obtained using resonance frequency analysis (RFA). Higher values are generally found in the mandible than the maxilla The maxilla (plural: ''maxillae'' ) in vertebrates is the upper fixed (not fixed in Neopterygii) bone of the jaw formed from the fusion of two maxillary bones. In humans, the upper jaw includes the hard palate in the front of the mouth. The t .... 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 repla ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Percussion (medicine)
Percussion is a technique of clinical examination. Overview Percussion is a method of tapping on a surface to determine the underlying structures, and is used in clinical examinations to assess the condition of the thorax or abdomen. It is one of the four methods of clinical examination, together with inspection, palpation, auscultation, and inquiry. It is done with the middle finger of one hand tapping on the middle finger of the other hand using a wrist action. The nonstriking finger (known as the pleximeter) is placed firmly on the body over tissue. When percussing boney areas such as the clavicle, the pleximeter can be omitted and the bone is tapped directly such as when percussing an apical cavitary lung lesion typical of tuberculosis. There are two types of percussion: direct, which uses only one or two fingers; and indirect, which uses only the middle/flexor finger. Broadly classifying, there are four types of percussion sounds: resonant, hyper-resonant, stony dull or dul ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
