Implant Primary Stability Determined by Resonance Frequency Analysis in Surgically Created Defects: A Pilot Cadaver Study

Chan, Hsun‐Liang; El-Kholy, Karim; Fu, Jia; Galindo‐Moreno, Pablo; Wang, Hom Lay

doi:10.1097/id.0b013e3181fa7f6a

Cited by 17 publications

(17 citation statements)

References 25 publications

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“…RFA used ISQ as a quantitative unit to assess implant stability has become a main tool these days for assessing implant stability (2). It is dependent of 3 main factors: (1) the stiffness of the implant fixture and its interface with the surrounding tissues, (2) the design of the transducer and (3) the total effective length above the bone level (19). It uses a small L-shape transducer that is tightened to the implant by a screw.…”

Section: Discussionmentioning

confidence: 99%

Comparison of implant primary stability between maxillary edentulous ridges receiving intramembranous origin block grafts

Monje¹,

Monje²,

Suárez³

et al. 2013

Med Oral

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Purpose: The purposes of the present study were: to compare the resonance frequency analysis (RFA) values of implant placed in either ramus or calvaria block grafts; and to determine if implant diameter influences RFA implant stability quotient (ISQ) value. Material and Methods: This was a retrospective study that included 16 consecutives healthy patients treated with autogenous onlay block grafts for horizontal bone reconstruction in maxilla. Ten ramus and ten calvaria block graft treated patients were selected and compared. Results: Totally, 59 implants were placed, 35 (59.3%) were placed on the calvaria bone grafts and the remaining 24 (40.7%) were on the ramus bone graft. Of all the implants studied, 13 (22%), 35 (59.3%), and 11 (18.6%) were 10 mm, 11.5 mm and 13 mm in length respectively. Regarding the diameter, 4 (7%) were 3.3 mm, 3 (5%) were 3.5 mm, 20 (34%) were 3.7 mm and 32 (54%) were 4 mm. Mean ISQ value obtained by RFA was 73.06 ± 6.08, being 72.19 ± 6 and 74.47 ± 6.06 for the calvaria and ramus treated group respectively. No significant differences were noted between the two groups (p= 0.154). Implants were pooled and divided by their diameter. Mean ISQ value obtained for 3.3 mm was 80 ± 5.09, while for 4.0 mm was 72.5 ± 7.19. Again, no significant differences were found among the groups (p= 0.138). Conclusion: For RFA ISQ value, the bone graft origins (calvaria or ramus) or implant diameters did not influence the outcome. Key words:Bone augmentation, dental implant, resonance frequency analysis, implant stability.

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Section: Discussionmentioning

confidence: 99%

Comparison of implant primary stability between maxillary edentulous ridges receiving intramembranous origin block grafts

Monje¹,

Monje²,

Suárez³

et al. 2013

Med Oral

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“…Primary implant stability is most frequently determined by using cutting-torque measurements or resonance frequency analysis (RFA) [6], which evaluates the micromotion or displacement of the implant in bone under a lateral load, applying microscopic lateral forces to the implant with a vibrating transducer [7, 8]. Results are given as implant stability quotients (ISQs) [9], which are affected by three main factors: the stiffness of the implant fixture and its interface with surrounding tissue, the design of the transducer, and the total effective implant length above bone level [10]. ISQs range from 0 to 100, with higher number indicating greater stability.…”

Section: Introductionmentioning

confidence: 99%

AnEx VivoModel in Human Femoral Heads for Histopathological Study and Resonance Frequency Analysis of Dental Implant Primary Stability

Hernández‐Cortés

Monje

Galindo‐Moreno

et al. 2014

BioMed Research International

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Objective. This study was designed to explore relationships of resonance frequency analysis (RFA)—assessed implant stability (ISQ values) with bone morphometric parameters and bone quality in an ex vivo model of dental implants placed in human femoral heads and to evaluate the usefulness of this model for dental implant studies. Material and Methods. This ex vivo study included femoral heads from 17 patients undergoing surgery for femoral neck fracture due to osteoporosis (OP) (n = 7) or for total prosthesis joint replacement due to severe hip osteoarthrosis (OA) (n = 10). Sixty 4.5 × 13 mm Dentsply Astra implants were placed, followed by RFA. CD44 immunohistochemical analysis for osteocytes was also carried out. Results. As expected, the analysis yielded significant effects of femoral head type (OA versus OA) (P < 0.001), but not of the implants (P = 0.455) or of the interaction of the two factors (P = 0.848). Bonferroni post hoc comparisons showed a lower mean ISQ for implants in decalcified (50.33 ± 2.92) heads than in fresh (66.93 ± 1.10) or fixated (70.77 ± 1.32) heads (both P < 0.001). The ISQ score (fresh) was significantly higher for those in OA (73.52 ± 1.92) versus OP (67.13 ± 1.09) heads. However, mixed linear analysis showed no significant association between ISQ scores and morphologic or histomorphometric results (P > 0.5 in all cases), and no significant differences in ISQ values were found as a function of the length or area of the cortical layer (both P > 0.08). Conclusion. Although RFA-determined ISQ values are not correlated with morphometric parameters, they can discriminate bone quality (OP versus OA). This ex vivo model is useful for dental implant studies.

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“…4,5 Many methods have been proposed to assess initial osseointegration. 10 The current version of a RFA device uses a small L-shaped transducer to "read" the implant stability. 6 In 1996, resonance frequency analysis (RFA) was developed and used implant stability quotient (ISQ) as a quantitative unit to assess implant stability.…”

mentioning

confidence: 99%

“…[6][7][8] However, most of them are no longer available due to their invasiveness and inaccuracy. This transducer comprises 2 piezoceramic elements: one vibrating by a sinusoidal sign (5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15), whereas the other serves as a receptor. 9 The reading of RFA reflects on the combination of the 3 main factors: (1) stiffness of the implant fixture and its interface with the surrounding tissues, (2) design of the transducer, and (3) total effective length above the bone level.…”

mentioning

confidence: 99%

Effect of Location on Primary Stability and Healing of Dental Implants

et al. 2014

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Implant Primary Stability Determined by Resonance Frequency Analysis in Surgically Created Defects: A Pilot Cadaver Study

Abstract: The association between implant primary stability measured by RFA and the size of surrounding bone defects was defect type dependent. The correlation was highly significant for WDD and CD but not for NDD.

Cited by 17 publications

References 25 publications

Comparison of implant primary stability between maxillary edentulous ridges receiving intramembranous origin block grafts

Comparison of implant primary stability between maxillary edentulous ridges receiving intramembranous origin block grafts

AnEx VivoModel in Human Femoral Heads for Histopathological Study and Resonance Frequency Analysis of Dental Implant Primary Stability

Effect of Location on Primary Stability and Healing of Dental Implants

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