A Retrospective Study on Insertion Torque and Implant Stability Quotient (ISQ) as Stability Parameters for Immediate Loading of Implants in Fresh Extraction Sockets

Abstract

Background To date, insertion torque value (ITV) and implant stability quotient (ISQ) obtained by the Osstell instrument are common clinical methods to assess the initial stability of an implant for a predictable loading procedure. The aim of this current study is to evaluate the ITV and ISQ as stability parameters as part of the decision-making protocol in the adoption of immediate loading in fresh extraction sockets. Materials and Methods A total of 41 tapered implants were allocated into two groups: the test group (n = 11; 3 males and 8 females; mean age: 62.8 ± 10.7) which received 18 implants as type 1 fresh extraction sockets after teeth removal and the control group (n = 7; 4 males and 3 females; mean age: 65.4 ± 9.7) which received 23 implants placed in healed sockets for a period of at least 3 months. Both the ITV and ISQ data were recorded at the time of insertion (t0). Since ITV (test group) and ITV/ISQ (control group) values were useful for the immediate loading protocol, a screw-retained temporary crown was immediately loaded. ISQ values were recorded after a healing period of 4 months (t1). Results ITV mean values at t0 in test and control groups were, respectively, 48.61 ± 15.39 and 70.47 ± 14.71, whereas ISQ mean values were 57.55 ± 1.93 and 72.86 ± 5.25, respectively, showing a statistically significant difference (p value < 0.001). ISQ mean values at t1 in either the test or the control group were 68.68 ± 4.20 and 74.54 ± 4.17, not showing a statistical difference. The implant survival rate was 100% in both groups, and no surgical and prosthetic complications were reported during the study. Conclusion In conclusion, this study remarked the presence of a residual gap that influenced the ISQ during implant insertion in fresh extraction sockets making this parameter not sufficient for a conclusive decision in the immediate loading, whereas the ITV alone showed to be the best parameter for a final substantial decision.

Evaluation of the implant diameter on the initial-stability of narrow- and standard-diameter implants placed in simulated Type-I and Type-IV bone-blocks

“…Various techniques such as Perio-test, reverse torque test, resonance-frequency-analysis (R-F-A), and assessment of implant-stability-quotient (ISQ) are used to assess implant stability 10 - 13 ; however, a global agreement regarding the most suitable mode of assessment is yet to be reached. There is a dearth of studies that have compared initial-stability of NDIs with SDI in relation to density of host bone.…”

Antioxidant Effect of Beer Polyphenols and Their Bioavailability in Dental-Derived Stem Cells (D-dSCs) and Human Intestinal Epithelial Lines (Caco-2) Cells

“…Several compounds have recently been identified that can significantly reverse senescence induced by oxidative stress. Moreover, D-dSCs are considered as a useful model in this translational research area also for their stemness properties [ 56 – 60 ]. To evaluate the antisenescence effect of the beer fractions, the D-dSC and Caco-2 cells were exposed to H 2 O 2 with and without beer fractions and analysed by using β -galactosidase assay.…”

Does the Osseodensification Technique Allow for the use of a Healing Chamber with Primary Stability in Low-Density Bone? An in Vivo Study

“…The average (± standard deviation) of the ve samples was calculated for each group. The implant stability quotient (ISQ) was determined (Osstell®, USA), simulating mesiodistal and buccolingual measurements, and the average was recorded 29 . The average (± standard deviation) of the ve samples was calculated for each group.…”