Early detection of implant healing process using resonance frequency analysis

Abstract

In this study, in vitro and in vivo models were adopted for assessing the application of resonance frequency analysis (RFA) in the early detection of implant stability. In the in vitro tests, RF values of implants placed in bone block with predrilled cavities of 3.75 and 5.0 mm were measured and compared. Stone was used to fill the inter-space between implants and the bone blocks. Our results showed that poor initial stability conditions contributed to a lower initial RF (IRF) value (5.41+/-0.32 kHz) and a longer simulated healing period (41 min) than that of well-fitted conditions (9.63+/-0.34 kHz for IRF, 14 min for the simulated healing period, P<0.05). To validate such in vitro tests, animal models were also performed. Implants were placed in the left tibias of six rabbits using a general surgery procedure. The modal testing method was used to test the RF values of the implants. The RF values of the implants increased significantly (P<0.05) during the healing period and reached a plateau when the implant-bone interface was united. The variations of RF values of the testing implants showed a similar trend to the results of in vitro tests, i.e., implants with higher initial RF values had shorter simulated healing times. Based on these findings, we concluded that RFA is a reliable and accurate method for early assessment of the osseointegration process.

A Newly Designed Resonance Frequency Analysis Device for Dental Implant Stability Detection

“…4). These results were consistent with other animal RFA 14,26) and reverse torque studies 16,27) . This initial reduction in stability might correspond to the remodeling and neo-apposition phases of the necrotized bone 16) .…”

“…In addition, the ISQ value is often influenced by the orientation of the Osstell's L-shaped transducer to the alveolar ridge 19,23) . Another type of RF analysis, based on impulse force triggering, has proven useful in terms of detecting dental implant stability in a series of in vivo and in vitro experiments [24][25][26] . In this study, therefore, the capability of a novel RF detection device based on impulse force triggering for monitoring dental implant stability was tested.…”

Factores que influyen en el coeficiente de estabilidad: diámetro y longitud

“…Este método permite estudiar la estabilidad del implante dental en diferentes momentos de la cicatrización ósea, siendo los resultados obtenidos reproducibles intraoperador e interoperador. Este método de estudio está basado en el análisis de la frecuencia, que consta de un transductor en forma de L (1) que va atornillado al implante perpendicular a la cresta ósea (17). Este transductor es estimulado mediante una señal sinusoide con un frecuencia de 5 a 10 KHz.…”

Current Possibilities for Detection of Loosening of Total Hip Replacements and How Intelligent Implants Could Improve Diagnostic Accuracy

“…Diagnostic investigation involving measuring the resonance frequencies of implants has its roots in the field of dentistry (Glauser et al, 2003;Huang et al, 2003). This field of research extended to determining the primary stability of THR during surgery (Lannocca et al, 2007).…”