Marginal Alveolar Bone Stability in Extra-short Implants Placed in Posterior Atrophic Mandible- Retrospective Clinical Study PDF Download
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Author: Fernando M Abreu
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Extra short implants represent a rehabilitation option for patients with severe alveolar bone resorption. The present retrospective cohort clinical study evaluated the marginal bone stability in short and short extra implants in function with 2 years in the posterior mandible. Digital periapical radiographs of 22 patients treated with short implants 10 (GC control group), being> 6mm and 9mm in length, and extra short, 25,
Author: Cholathee Verochana
Publisher:
ISBN:
Category : Dental implants
Languages : en
Pages : 172
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Book Description
Objective: To compare the stability of short implants placed in the posterior maxilla and mandible within a 4-month healing period.Material and methods: A total of 24 patients who were partially edentulous in the posterior were enrolled in the study. Thirty short implants (4.2 mm in diameter and 7.5 mm in length) with rough surface were placed with 2-stage surgical approach (15 implants each in maxilla and mandible). Resonance frequency analysis (RFA) was used to measure implant stability at time of surgical placement, at 2 months, at 3 months, and at 4 months after surgical placement. Implant stability quotient (ISQ) values of maxillary and mandibular implants were compared using Mann Whitney test and Wilcoxon Signed Ranks test.Results: Within the 4-month healing period, the ISQ values increased gradually in both maxillary and mandibular implants. The mean ISQ values of implants in the mandible were significantly greater than those in the maxilla at every respective length of healing time. The success of short implants in this study was 96.7%. Conclusions: Short implants with rough surface in the posterior maxilla had less stability than those in the posterior mandible during the 4-month healing period. Our study indicated that short implants with rough surfaces can gain a high degree of osseointegration within 2 months in the mandible and within 3 months in the maxilla if good stability was achieved at implant placement.
Author: Boyd J. Tomasetti
Publisher: Springer Nature
ISBN: 3030441997
Category : Medical
Languages : en
Pages : 334
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Book Description
This comprehensive guide to short implants will take the reader through their research and development, explain the clinical indications, evaluate the outcomes achieved with various implants, and explore restorative and laboratory considerations. Short implants have steadily gained greater market share in the last decade as practitioners sought alternatives to traditional length implants in order to avoid grafting procedures. Current manufacturers offer a variety of implant lengths and widths, allowing surgeons and restorative dentists the ability to select the best implant for each clinical circumstance. Cutting edge information is provided on the research and clinical results achieved utilizing a range of implants, specifically those developed by Nobel Biocare, Straumann, Jack Hahn, and Bicon. Readers will also find an extensive description of the role of ultra-short implants involving reconstruction in both cleft patients and cancer patients who have lost portions of their mandible and/or maxilla. This book is a must-have for those interested in learning how the use of short and ultra-short implants offers both surgeons and restorative dentists an opportunity to stand out from those that use only the traditional length implants.
Author: Fernando M Abreu
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Extra short implants represent a rehabilitation option for patients with severe alveolar bone resorption. The present retrospective cohort clinical study evaluated the marginal bone stability in short and short extra implants in function with 2 years in the posterior mandible. Digital periapical radiographs of 22 patients treated with short implants 10 (GC control group), being> 6mm and 9mm in length, and extra short, 25,
Author: Tomas Linkevic̆ius
Publisher:
ISBN: 9780867158342
Category :
Languages : en
Pages :
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Author: Boosana Kaboosaya
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Background: Implant stability has been recognized as an essential factor link to osseointegration and predicts the survival rate of dental implants. The resonance frequency analysis (RFA) is a noninvasive device providing results in the form of the implant stability quotient (ISQ). The primary stability is also influenced by numerous factors such as surgical technique, implant morphology as well as bone quality and quantity. In the posterior maxilla, the sparse bone density leads to low primary stability. Aim: This retrospective study aims to analyze the factors that influenced the primary stability of dental implant of posterior maxilla.Material and methods: Patients records of treatment performed between January 2014 to December 2018 were reviewed for primary implant stability. Patients who had Straumannu00ae implants at posterior maxilla and exhibited RFA both buccal and mesial area immediate implant placement were included. The following variables were determined; patient age, gender, implantation region, timing of implant placement after tooth extraction (immediate placement, u2264 4 months after extraction, > 4 months after extraction), implant geometry (diameter and length), and adjunctive procedures during implantation (guided bone regeneration and transcrestal osteotomy). The RFA value was used The Kolmogorov-Smirnov Test to determine normal distribution. The Chi-Square Test was applied to compare the relationship between qualitative variables and the Kruskalu2013Wallis test was used to compare the mean. The Pearson correlation coefficient was used to determine correlation.Results: Seventy implants in 53 patients (male 19, female 34) were found. The mean age of this sample size is 59.04uf0b11.41 years old. The mean value of RFA of the buccal area is 65.76uf0b11.44 and the mean of RFA of mesial area 66.59uf0b11.55. The RFA value of the buccal and mesial area was significant correlate (p
Author: Tulio Bonna Tulio
Publisher:
ISBN:
Category :
Languages : en
Pages :
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BACKGROUNDSinus lift procedures are considered a safe and predictable option for bone gain in the posterior maxilla. Several studies demonstrated that anorganic bovine bone is considered a predictable option for grafting the maxillary sinus and provide high implants survival rates. Modern surfaces chemically modified sandblasted and acid-etched with hydrophilic properties aims to decrease healing time and afford early loading of dental implants. However grafted sites may represent a challenge for early loading of implants compare to native bone.AIMThe aim of this study was to evaluate the implant stability measurements using resonance frequency analysis (RFA) of a new surface implants placed in native bone and augmented sites at baseline and after 8 weeks.MATERIAL AND METHODSSeventeen edentulous patients with deficient bone high in the posterior maxilla (5mm) were select according to tomographic analysis for bilateral sinus floor elevation. All procedures were performed with the lateral window approach using 100% anorganic bovine bone and collagen membrane over the window. After 8 months, a second tomographic exam was used for planning the placement of 6-8 dental implants with a sandblasting and acid etching surface maintained in an isotonic solution of 0.9% sodium chloride. The implants were maintained submerged in all patients. After 8 weeks, the re-opening surgeries were performed and provisional prosthetic rehabilitation was started. All implants were rehabilitated with splinted crowns. The insertion torque was measured at the day of the implants placement (baseline) while the resonance frequency analysis (RFA) was performed at baseline and after 60 days. The implants survival was evaluated after 6 months of provisional prosthetic rehabilitation.RESULTS A total of 113 implants were performed in augmented sites and native bone (89 and 24, respectively) to allow fixed prostheses oral rehabilitation. Four implants failed and a survival rate of 96,46% was achieved after 6 months of provisional prosthetic rehabilitation. It was showed that the implants placed in the native bone (~60Ncm) presented higher values of insertion torque than the implants placed in grafted areas (~45Ncm). Regarding the RFA analysis, implants placed in grafted areas presented greater stability in relation to the implants placed in native bone in the period of 60 days. In addition, the RFA of the implants placed in native bone reduced at the period of 60 days in relation to the baseline period. All the implants presented an adequate value for the induction of occlusal loading ( 60).CONCLUSION AND CLINICAL IMPLICATIONSWithin the limitations of the present study, RFA analysis demonstrated that the new implant surface presented adequate values for occlusal loading after 60 days of implant insertion in augmented sites. Considering the short term period evaluation (6 months) a good implant survival rate of 96,46% can be achieved for early loading in augmented sites.
Author: Nabil Nadji
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Gustavo Boehmer Leite
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Obtaining and maintaining implant stability are prerequisites for the clinical success of implant prostheses. Since primary stability is a direct consequence of bone-implant contact, it depends on bone density, surgical technique, and macroscopic and microscopic morphology of the implant used. Primary stability can be either measured by insertion torque or ressonance frequency analysis, but no relation between these two is clearly described. The objective of this study was to evaluate the statistical correlation of primary stability through ressonance frequency analisys (RFA) and manual torque of insertion through literature review and case series study.This study was conducted on a post-graduate clinic (CLIVO- Rio de Janeiro,Brazil), where fourteen dental implants had their manual torque and RFA measured using a manual torque device during instalation. RFA measured the Implant stability Quoeffcient(ISQ) using a smartpeg after instalation in 5 different positions ( bucal, lingual, occlusal,mesial and distal).All of the fourteen implants had the same conical connection and were placed in the mandible or maxila. The mean ISQ measurements and manual torque were submitted to statistical analysis to determine a possible correlation.We evaluated 13 implants, 9 implants performed in female patients and 4 male patients, 5 in maxilla and 8 in mandible. For the study, internal connical connection dental implants were used. In order to verify the correlation between TORQUE and ISQ, the statistical software.
Author: Carlo Barausse
Publisher:
ISBN:
Category :
Languages : en
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Purpose: To evaluate whether 5-mm short dental implants could be an alternative to augmen- tation with anorganic bovine bone and placement of at least 10-mm long implants in posterior atrophic jaws.Materials and methods: Fifteen patients with bilateral atrophic mandibles (5 to 7 mm bone height above the mandibular canal) and 15 patients with bilateral atrophic maxillae (4 to 6 mm bone height below the maxillary sinus), and bone thickness of at least 8 mm, were randomised according to a split-mouth design to receive one to three 5-mm short implants or at least 10-mm long implants in augmented bone. Mandibles were vertically augmented with interpositional bone blocks and maxillary sinuses with particulated bone via a lateral window. Implants were placed after 4 months, submerged and loaded, after another 4 months, with provisional pros- theses. Four months later, definitive provisionally cemented prostheses were delivered. Outcome measures were: prosthesis and implant failures, any complication and peri-implant marginal bone level changes.Results: In five augmented mandibles the planned 10-mm long implants could not be placed and shorter implants (7.0 and 8.5 mm) had to be used instead. Five years after loading, six patients, five treated in the mandible and one in the maxilla, dropped out. Three prostheses (one mandibu- lar and two maxillary) failed in the short-implant group versus none in the long-implant group. In mandibles one long implant failed versus two short implants in one patient. In maxillae one long implant failed versus three short implants in two patients. There were no statistically signifi- cant differences in implant (n = 26; P = 1.00, difference = 3.85%, 95% CI: u221212.95% to 20.64%) and prosthetic (n = 26; P = 0.250, difference = 11.54%, 95% CI: u22120.74% to 23.82%) failures. Eleven patients had 16 complications at short implants (one patient accounted for six complica- tions) and 12 patients had 14 complications at long implants. There were no statistically signifi- cant differences in complications (n = 28; P = 1.00, difference = u22123.57%, 95% CI: u221230.65% to 23.51%). Five years after loading, patients with mandibular implants lost on average 1.72 mm at short implants and 2.10 mm at long implants of peri-implant marginal bone. This difference was statistically significant (difference = 0.37 u00b1 0.43 mm; 95% CI: 0.07 to 0.68 mm; P = 0.022). In maxillae, patients lost on average 1.31 mm at short implants and 1.79 mm at long implants. This difference was statistically significant (difference = 0.48 u00b1 0.43 mm; 95% CI: 0.22 to 0.74 mm; P = 0.002).
Author: Oleg Yefremov
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Insufficient bone remains challenging for implantologists, especially in posterior maxilla. Short implants are indispensable in such situations. Implant design, bone quality and quantity significantly influence the functional load transfer. Bone strains are major stimuli of bone turnover, but their high magnitudes result in implant failure. Numerical analysis is necessary to correlate bone and implant parameters with bone strain spectrum and to evaluate implant prospect.The aim of the study was to evaluate the impact of Bicon Integra-CPu2122 implants and bone quality on strain levels in adjacent bone to predict implant success/failure in atrophic posterior maxilla.Nine Bicon Integra-CPu2122 implants with 4.5 (N), 5.0 (M), 6.0 (W) mm diameter and 5.0 (S), 6.0 (I), 8.0 (L) mm length were selected for this comparative study. Their 3D models were placed in 36 posterior maxilla segment models with types III and IV bone, 1.0 (A) and 0.5 (B) mm crestal cortical bone thickness. These models were designed in Solidworks 2016 software. All materials were assumed as linearly elastic and isotropic. Elasticity modulus of cortical bone was 13.7 GPa, cancellous bone u2013 1.37/0.69 GPa (type III/IV). Bone-implant assemblies were analyzed in FE software Solidworks Simulation. A total number of 4-node 3D FEs was up to 3,580,000. 120.92 N mean maximal oblique load (molar area) was applied to the center of 7.0 mm abutment. First principal strain (FPS) distributions were studied according to the concept of u201cminimum effective strain pathologicalu201d (MESp) by Frost. Maximal FPSs were correlated with 3000 ustrain MESp to evaluate the prognosis of each implant.Maximal FPSs spectrum 200u20267500 ustrain was found in the cortical-cancellous bone interface. Critical FPSs (>3000 ustrain) were observed for N implants for IV,A/B,S/I/L and III,A,S/I scenarios. For M and W implants, critical FPSs were found only for M,III/IV,A,S/I, M,IV,B,S/I and W,IV,A,S scenarios. Favorable FPSs (200u20263000 ustrain) were calculated in vicinity of W implants for all scenarios excluding IV,A,S. For M implants, favorable FPSs were observed for IV,A/B,L, III,A,L and III,B,S/I/L scenarios, and only III,A,L and III,B,S/I/L for N implants. Implant diameter increase (4.5 vs. 6.0 mm) have led to 71/87, 74/88, 66/88, 57/80, 60/81, 56/73% FPS reduction for 1.0/0.5 mm cortical bone and III,S, III,I, III,L, IV,S, IV,I, IV,L scenarios. FPS magnitudes were found sensitive to bone quality: FPS reduction in type III bone relative to type IV was 25/46, 26/48, 32/48, 17/41, 20/46, 33/50, 48/64, 52/67, 47/76% for 1.0/0.5 mm and N,S, N,I, N,L, M,S, M,I, M,L, W,S, W,I, W,L scenarios.Bone strains were influenced by implant dimensions, cortical bone thickness and bone quality. 4.5 mm diameter implants with the largest length were recommended only for type III bone. 5.0u00d78.0 mm implant was suitable for both bone types and cortical bone thickness, shorter implants u2013 only for type III and 0.5 mm cortical bone. 6.0 mm diameter implants caused positive bone turnover balance for all but one scenarios. Clinicians should consider these findings in planning of short plateau implants.
