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The use of dental implants in the rehabilitation of partially and completely edentulous patients has been significantly increased in recent years. Although high survival rates of implants supporting prosthesis have been reported, failure still happens due to bone loss as results of primary and secondary implant stability. Primary stability of an implant mostly comes from mechanical interaction with cortical bone while secondary stability happens through bone regeneration and remodelling at the implant/bone interface. Defining the implant stability remains a challenge in dentistry and several researches have been made in this field. To detect implant stability, various diagnosis analyses have been employed. Among them, resonance frequency analysis (RFA) is an objective method of monitoring implant/tissue integration. In this thesis, experimental and numerical studies are carried out to find the effect of some parameters affecting the stability of dental implant by using RFA. Modal analysis technique is employed to investigate the effect of coupled mode shapes in dental implant. Moreover, the primary stability of dental implant that indicates the process of bone-implant integration is investigated. Resonance frequency of jaw-implant structure is carried out using finite element modelling. Different implant-bone interface conditions are studied for this investigation. The effects of endosseous implant angulation on the resonance frequency of implant are studied. MIMICS, a three dimensional (3D) modelling software was used to construct a 3D model of a pig mandible from computed tomography (CT) images. The resonance frequency of the implant was analyzed using finite element (FE) modal analysis in a simulated environment. The MIMICS is also used to investigate effect of soft tissue surrounding the implant on the RF of implant. In addition, three different pig mandibles were employed to assess the effect of some parameters affecting resonance frequency of implant. Finally, experimental studies are carried out to investigate the effect of soft tissue on RF of implant. A novel device is also designed for stability analysis of dental implants.
BACKGROUND: Resonance frequency analysis (RFA) is a simple, practical, reproducible, clinically feasible and non-invasive method that allows to safely assess the degree of stiffness that the implant is within the bone structure. AIM: According to the applied methodology, the aim of this clinical study was to perform a research to evaluate the stability of two different types of implants, with resonance frequency analysis (RFA). METHODS AND MATERIALS: This clinical research was approved by the ethical committee (Plataforma Brasil) under the number CAEE 54726816.6.0000.5374. Patients were submitted to conventional dental implant surgery with installation of two implants, Straumannu2019s, Bone Level Tapered (BLT) 4x8mm and SINu2019s Unitite 4x8,5mm. Each patient received two implants, one from each brand, with their respective healing abutments. The stability of the implants (ISQ) was measured by the Osstell apparatus. A torque of 10Ncm was applied to the smartpegs. The stability of the implants was measured at the time of surgery, four, six and eight weeks post-surgery. At each stage, three measurements were taken and a mean (mean ISQ) was obtained for each implant. RESULTS: Each group (SINu00ae and Straumannu00ae) was treated, separately, with ANOVA and the differences found identified by Tukey-Kramer multiple comparisons test. The Straumann implants show no statically difference in the ISQ values for all measurements. The SIN group showed only a statistically lower ISQ value in the 4 week. The two groups were compared in all stages with a paired t-test. The ISQ values u200bu200bfor the Straumann groups were statistically higher in all stages (P
Implant dentistry has changed and enhanced significantly since the introduction of osseointegration concept with dental implants. Because the benefits of therapy became apparent, implant treatment earned a widespread acceptance. Therefore, the need for dental implants has caused a rapid expansion of the market worldwide. Dental implantology continues to excel with the developments of new surgical and prosthodontic techniques, and armamentarium. The purpose of this book named Current Concepts in Dental Implantology is to present a novel resource for dentists who want to replace missing teeth with dental implants. It is a carefully organized book, which blends basic science, clinical experience, and current and future concepts. This book includes ten chapters and our aim is to provide a valuable source for dental students, post-graduate residents and clinicians who want to know more about dental implants.
See how to effectively manage ALL dental implant complications throughout ALL phases of treatment! Avoiding Complications in Oral Implantology provides evidence-based management protocols for a wide range of implant problems such as placement complications, malpositioning, bleeding, infection, and nerve injuries. Hundreds of high-quality, full-color photos and illustrations clearly demonstrate the complications and their resolution. Edited by Carl Misch and Randolph Resnik — both well-known names in dental implantology and prosthodontics — and with a team of expert contributors, this authoritative guide helps you handle the implant-related complications that can occur as more and more patients choose dental implants. Expert authors are joined by a panel of recognized leaders in implant dentistry — many of whom are associated with the Misch International Implant Institute — to share their extensive experience with handling complications through all phases of treatment. Comprehensive approach to complications that occur in the different phases of oral implantology provides the knowledge and skills you need to handle treatment planning, implant placement, post-operative complications, prostheses-related complications, and more. Over 1,000 images include full-color clinical photographs, radiographs, line drawings, and diagrams, clearly demonstrating complications, procedures, and outcomes. Management protocols developed by world-renowned dental implantologists provide a proven system and authoritative guidance in managing complications with dental implants. Evidence-based solutions make it easier to manage a wide variety of clinical problems associated with dental implants, with state-of-the-art guidance supported by the best available research.
Assessment of implant stability by resonance frequency analysis in anterior and posterior segments of mandibulary edentuolus ridgesOne of the most important inventions in modern dentistry are dental implants. The process of osteointegration is a result of the initial mechanical stability complemented with biological stability. Osstell device was invented to measure the stability of dental implants at any time of the treatment.Aim/Hypothesis: The aim of this study was to analyze the implant stability quotient (ISQ) results of the resonance frequency (RF) in anterior and posterior segments of the lower jaw at the first day of placement of dental implants and 3 months after the surgery.Materials and Methods: This study was approved by forty patients with total or partial edentulous mandibular jaws underwent with 76 dental implants. The ISQ values were measured at the day of surgery and 3 months after placement. Osttell Mentor device was used to measure the RF value of the implant fixture through the transducer or pin. Measurements were taken four times in each direction of inserted oral dental implant.Results: The ISQ primary stability at the day of surgery had a mean value of 63.81 (SD 9.48) for dental implants in anterior segment of lower jaw and the secondary stability was 70.25. The mean ISQ of primary stability of the posterior segments of lower jaw was 63.89 (SD 6,99) while the secondary stability 69.43. Differences between primary and secondary mean ISQ values were statistically significant (p
Title : Changes of implant stability measured at surgical stage using resonance frequency analyzer,In-Ho Cho , Yin-Zhe An, Sang-Yeon Han, Kyo-Jin Ahn, Young-Gyun Song , Joon-Seok LeeDepartment of Prosthodontics, College of Dentistry, Dankook University, Republic of Korea.Background : Implant stability is very important factor for implant success. The change of implant stability after surgery can be measured with Osstell Mentor which has high clinical reliability. ISQ can be expressed at first and second surgery using Osstell Mentor. The result can be used to evaluate the healing process of surgically operated dental implant.. Aim : The change of implant stability after surgery can be measured with Osstell Mentor which has high clinical reliability. ISQ can be expressed by Osstell Mentor. The result can be used to evaluate the healing process of surgically operated dental implant.Material and Methods: A total of fifty-five dental implants were inserted in the jaw bones of twenty-eight patients of Dankook University dental hospital using two-stage surgical procedure and implant stability was measured using resonance frequency analyzer, Osstellu2122 Mentor at first and second stage surgery. The data was collected and classified according to gender, implant length, implant diameter, and implanted site, maxilla and mandible. Mann-Whitney test, Wilcoxon-sighed rank test, Wilcoxon rank sum test, Kruskal-Wallis test and Nemenyi test were used to analyze the collected data. Statistical analyses were made between gender, implant length, implant diameter, and implanted siteResults : The primary implant stability was compared with secondary implant stability at first and second stage surgery using resonance frequency analyzer, Osstell Mentor, with which ISQ was recorded. Statistically significant difference was observed between primary and secondary implant stability(P
The establishment of osseointegration following dental implant placement is a major contributing factor to the clinical success and long-term function of implant-retained prosthesis, Radiographic examination and palpation have been two of the methods often used in clinical assessment for implant stability for years However, theses radiographs are two-dimensional and difficult to standardize, The investigation was designed to study the use of resonance frequency analysis in search of the stability of the implant-issue interface in vitro, Resonance frequency was measured when test implants were embedded in bakelites, The change in stiffness observed during bone healing was modeled by embedding implants in gypsum during setting period, Our results showed that there was an increase in resonance frequency related to stiffness increment during osseointegration,