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Immediate loading of dental implants – planning and provisional restauration: A case report
Published in J. Belinha, R.M. Natal Jorge, J.C. Reis Campos, Mário A.P. Vaz, João Manuel, R.S. Tavares, Biodental Engineering V, 2019
Marques Joâo S., Diogo Soares, J.M. Rocha, P.J. Almeida, J.C. Sampaio-Fernande, M.H. Figueiral
The main criterion for performing the immediate loading of single implants is a primary stability. Primary stability can be measured by several parameters such as insertion torque – measured in Newton-centimeters (N/cm) and implant stability quotient (ISQ) – measured by Resonance Frequency Analysis (RFA). Previous studies have shown that primary stability is a critical factor for the immediate loading, and low initial stability is a significant risk factor of early failure of single implants with immediate loading (Moraschini & Porto Barboza, 2016). In this particular case, both the torque and ISQ indicated safe immediate implant loading.
Implant Stability Quotient (ISQ) from surgery to prosthetic rehabilitation
Published in R.M. Natal Jorge, J.C. Reis Campos, Mário A.P. Vaz, Sónia M. Santos, João Manuel R.S. Tavares, Biodental Engineering IV, 2017
Manuel A. Sampaio-Fernandes, Luís Guilherme Pimentel, Nuno Mesquita Marques, Pedro Ferras Fernandes, Paulo Júlio Almeida, João C. Sampaio-Fernandes
The resonance frequency analysis technique has the potential to provide clinically relevant information about the state of the implant-bone interface at any stage of the treatment. The question is how to beneft most from information obtained by a single RFA measurement in clinical practice. Ost-man et al.[23,24] reported low failure rates when using implant stability quotient 60 as an inclusion criterion for immediate loaded implants in totally edentulous maxillas and in posterior mandibles. Other studies report that ISQ above 65 indicate a favorable stability to immediate loading, whilst low ISQ values may be indicative of overload and ongoing failure.[1] In such cases, unloading and perhaps placement of additional implants before inserting the permanent prosthesis should be considered. To date, there is a lack of studies that document clear clinical benefits from therapeutic decisions based on RFA measurements.
Radiofrequency treatment of the incompetent saphenous vein
Published in Peter Gloviczki, Michael C. Dalsing, Bo Eklöf, Fedor Lurie, Thomas W. Wakefield, Monika L. Gloviczki, Handbook of Venous and Lymphatic Disorders, 2017
Alan M. Dietzek, Stuart Blackwood
While saphenous RFA combines the benefits of a minimally invasive procedure with excellent clinical outcomes, new endovenous modalities continue to challenge RFA as the preferred technique for the treatment of the incompetent, symptomatic saphenous vein. These include tumescentless mechanochemical endovenous ablation (MOCA), chemical and glue ablations, and higher-wavelength laser fibers, covered laser fibers, and minimally invasive conventional surgical techniques. In one recent small, prospective study of 38 patients using glue—cyanoacrylate embolization (CAE) with the VenaSeal Sapheon Closure System (Sapheon, Inc., Morrisville, NC)—a 92% target vein closure rate was achieved without the need for tumescent anesthesia or post-operative compression stockings. These outcomes were maintained at the 2-year follow-up.58 A randomized controlled trial published at the time of the writing of this chapter describes the immediate 3-month follow-up results of CAE (n = 108) versus segmental RFA (n = 114). The study showed non-inferiority of CAE to RFA, an adequate safety profile, less peri-procedural ecchymosis, and no need for tumescent anesthesia.59 There was no statistical advantage to RFA where peri-procedural pain scores were concerned.
What is the difference in ablation zone of multi-bipolar radiofrequency ablation between liver cirrhosis and normal liver background? – a prospective clinical study
Published in International Journal of Hyperthermia, 2020
Hong Wang, Jung-Chieh Lee, Kun Cao, He-Wen Tang, Song Wang, Zhong-Yi Zhang, Wei Wu, Kun Yan, Wei Yang
Previously, Cassinotto et al. [26] have performed a retrospective study in 111 patients and reported that there was no difference in the ablation zone volume between cirrhotic and healthy liver at three time points after RFA. However, their study was performed with cluster electrode which was different with the bipolar RF ablation device in our study. Also, due to the limit of retrospective study in Cassinotto’s report, 30 of 83 lesions in the cirrhosis group and 21 of 57 lesions in the healthy liver group were treated using additional overlapping applications. The additional overlapping application possibly changed the size of final ablation zone. In our prospective study, only the lesions ablated with designed RFA protocol and the lesions had proper locations were enrolled, which would help to control the confounding factors. We only measured the ablation zone once at one month after RFA, which might not completely reflect the process that ablation zone decreased in size and volume gradually.
Evaluation of postoperative dental implant primary stability using 3D finite element analysis
Published in Computer Methods in Biomechanics and Biomedical Engineering, 2019
We have further investigated the work of Pagliani et al. (Pagliani et al. 2013). Their study was in vitro. We, however, used FEA to simulate the implant stability according to the correlation between micro mobility and ISQ. Their in vitro investigations were conducted to study the relationship between resonance frequency analysis and lateral displacement measurements (micro mobility) and their work does not contain a distinctive characterization. In our work, however the curve fitting process was accomplished and based on that it was possible to correlate it with the manually measured ISQ values, simulated micro mobilities and physical measurements. However, it is important to note that the curve fitting process was carried out on the measurements of a different implant type. Although this led to some sort of deviation (Figure 6), the simulated results were approximately close to the real ISQ values. In addition, it is important to specify calibration curves for every analyzed implant. After reviewing the literature, no other publication was found which used some kinds of FEA to evaluate ISQ values and to describe the primary stability of the implant.
Effects of low-intensity laser therapy on the stability of orthodontic mini-implants: a randomised controlled clinical trial
Published in Journal of Orthodontics, 2018
Ahmed Mohamed Abohabib, Mona Mohamed Fayed, Amr H. Labib
Resonance frequency analysis is a non-invasive measurement technique that holds great promise for the clinical evaluation of mini-implant stability. It allows for tracking of changes that occur during the transition from primary to secondary stability without interfering with the healing process. It has been suggested that resonance frequency analysis is reliable, shows no systematic errors, gives valid measurements and can be used as measurement method for mini-implant stability (Veltri et al. 2009; Ure et al. 2011; Nienkemper et al. 2013; Sakin and Aylikci 2013). In the present study, the Osstell Device ISQ has been used along with resonance frequency analysis for measuring the stability of the mini-implant. The stability was measured immediately after placing the mini-implant to record the primary stability. Stability was then measured on every appointment till the 10th week after the placement, to record changes in the stability which might occur during the transition from primary to secondary stability which was found to be the healing period of mini-implants (Wehrbein and Gollner 2009).