scholarly journals Photoelastic Comparison of Single Tooth Implant-Abutment-Bone of Platform Switching vs Conventional Implant Designs

2011 ◽  
Vol 12 (2) ◽  
pp. 124-130 ◽  
Author(s):  
Adriana Cristina Zavanelli ◽  
Recardo Alexandre Zavanelli ◽  
Fabiana Rossi
Keyword(s):  
Clinical Decision ◽  
Switching Design ◽  
Single Tooth ◽  
Implant Abutment ◽  
Compressive Loads ◽  
Photoelastic Analysis ◽  
Platform Switching ◽  
Apical Site ◽  
Switching Characteristics ◽  
Single Tooth Implant

ABSTRACT Objectives The maintenance and stability of peri-implantar soft tissue seem to be related to the crestal bone around the implant platform and different implant designs connections might affect this phenomenon. The aim of this study was to evaluate by photoelastic analysis the stress distribution in the cervical and apical site of implant-abutment interface of conventional implant joints (external hex, internal hex and cone morse) and compare to the novel platform switching design. Materials and methods It was fabricated photoelastic models using five different implant-abutment connection, one set of external hex (Alvim Ti, Neodent, Curitiba, Brazil), one set of internal hex (Full Osseotite, Biomet 3i, Florida, USA), one cone morse set (Alvim CM, Neodent, Curitiba, Brazil), and two sets of internal hex plus platform switching concept (Alvim II Plus, Neodent, Curitiba, Brazil) (Certain Prevail, Biomet 3i, Florida, USA). These models were submitted to two compressive loads, axial from 20 kgf (load I) and another (load II), inclined 45° from 10 kgf. During the qualitative analysis, digital pictures were taken from a polariscope, for each load situation. For the quantitative analyses in both situations of load, the medium, minimum and maximum in MPa values of shear strain were determined in the cervical and apical site. The Kruskal-Wallis test was used to compare the results between the different systems and between cervical and apical site were compared using Mann-Whitney U test. Conclusion The minor stress concentration strongly suggest the use of platform switching design as a manner to prevent bone loss around the implant-abutment platform. Clinical Significance From the result of this study its possible to make clinical decision for implant system which provides implant components with platform switching characteristics. How to cite this article Rossi F, Zavanelli AC, Zavanelli RA. Photoelastic Comparison of Single Tooth Implant-abutment- Bone of Platform Switching vs Conventional Implant Designs. J Contemp Dent Pract 2011;12(2):124-130.

scholarly journals Aesthetic Outcomes and Peri-Implant Health of Angled Screw Retained Implant Restorations Compared with Cement Retained Crowns: Medium Term Follow-Up

2021 ◽  
Vol 12 (2) ◽  
pp. 35
Author(s):  
Livia Nastri ◽  
Ludovica Nucci ◽  
Vincenzo Grassia ◽  
Rino Miraldi
Keyword(s):  
Bone Loss ◽  
Functional Results ◽  
Technical Solution ◽  
Marginal Bone Loss ◽  
Single Tooth ◽  
Natural Teeth ◽  
The Aesthetic ◽  
Single Implant ◽  
Single Tooth Implant

Single tooth implant restorations in the aesthetic area are a demanding challenge. If a complete osseointegration is mandatory, the final result has to result in a higher standard of biomimetic and soft tissue health among natural teeth. This outcome is traditionally pursued by cementing crowns over individualized abutments. However, in recent years, the need for controlling peri-implant health and the preference towards a retrievable solution has led to an increase in screw-retained crowns, which is not always applicable when the implant axis is not ideal. In the aesthetic area, the use of a novel technical solution represented by the angled screw channel (ASC) of the abutment has been proposed in order to match the advantages of the screwed solution with the aesthetic demands. The aim of this study was to compare ASC crowns to cemented crowns (CC) in single implant restorations using the white esthetic score (WES) and pink esthetic score (PES) at the crown delivery and at a follow-up of a minimum of 2 years. Peri-implant health and marginal bone loss (MBL) were also evaluated. The mean follow-up was 44.3 months, with a mean MBL of 0.22 mm in the ASC group and 0.29 mm in the CC group. The total WES/PES score was 16.6 for ASC, compared with 17.3 for CC at baseline, and 16.2 and 17.1, respectively, at follow-up. Both of the groups reached a high WES/PES, and this was maintained over time, without signs of peri-implant diseases or bone loss, regardless of the choice of connection. In conclusion, ASC can be adopted in cases where the implant axis is not ideal, with aesthetic and functional results that are comparable to implants restored by cemented crowns.

A retrospective study on survival rate of the most posterior single tooth implant

2008 ◽  
Vol 38 (4) ◽  
pp. 611 ◽  
Author(s):  
Sung-Woo Jung ◽  
Jae-Kwan Lee ◽  
Heung-Sik Um ◽  
Beom-Seok Chang
Keyword(s):  
Retrospective Study ◽  
Survival Rate ◽  
Single Tooth ◽  
Single Tooth Implant

scholarly journals Evaluation of biological changes at the proximal contacts between single-tooth implant-supported prosthesis and the adjacent natural teeth – An in vivo study

2020 ◽  
Vol 20 (4) ◽  
pp. 378
Author(s):  
VizaikumarVasudha Nelluri ◽  
MariaRoseme Kandathilparambil ◽  
BhanuChander Vayadadi ◽  
NaveenKumar Gajjam
Keyword(s):  
In Vivo Study ◽  
Single Tooth ◽  
Natural Teeth ◽  
Single Tooth Implant

The Effect of Different Implant-Abutment Mis-Matches on Stress Distribution: A 3-Dimensional Finite Element Study

2021 ◽  
Author(s):  
Douglas Albert Deporter ◽  
Vahid Esfahanian ◽  
Armin khosravi ◽  
Mohammad Ketabi
Keyword(s):  
Finite Element ◽  
Bone Density ◽  
Marginal Bone Loss ◽  
3 Dimensional ◽  
Posterior Maxilla ◽  
Implant Abutment ◽  
Modeling Software ◽  
Dimensional Finite Element ◽  
Platform Switching ◽  
Element Study

Platform-switching reduces peri-implant marginal bone loss (MBL), and the aim of this study was to compare the effect of platform-switching on stress within crestal bone using different implant-abutment mis-matches (0.65 and 1mm) under two different vertical loads (30 N vs 200 N) for implants placed in posterior jaw sites. 3-D modeling software was used for an implant of 4.5mm diameter and 13mm length. Molars were modeled using CT images of bone density in human maxilla (D3 bone) and mandible (D2 bone). Collected data were analyzed using CATIA software. In posterior mandible, stress of 30 N force with platform mis-matches of 0.65 or 1mm were 2.920 and 2.440 MPa respectively. Using 200 N force, values increased to 19.44 and 16.30 MPa. In posterior maxilla and 30 N force, stresses with mis-matches of 0.65 and 1mm were 3.77 and 3.18 MPa respectively increasing to 25.14 & 20.17 with 200 N force. The effect can be predicted to be greatest as the mis-match increases with implants placed into lower quality bone (posterior maxilla with D3 quality).

Quality Assessment of Systematic Reviews on Platform-Switching vs Platform-Matched Implants: An Overview

2020 ◽  
Vol 46 (2) ◽  
pp. 153-162
Author(s):  
Joel Ferreira Santiago ◽  
Cleidiel Aparecido Araújo Lemos ◽  
Jéssica Marcela de Luna Gomes ◽  
Fellippo Ramos Verri ◽  
Sandra Lucia Dantas Moraes ◽  
...  
Keyword(s):  
Quantitative Analysis ◽  
Systematic Reviews ◽  
Meta Analysis ◽  
Mean Difference ◽  
Quality Analysis ◽  
Electronic Library ◽  
Implant Abutment ◽  
Bone Preservation ◽  
Platform Switching ◽  
Meta Analyses

The objective of this study was to perform a quality analysis of systematic reviews with meta-analyses that focused on the comparison of platform-switching (implant-abutment mismatching) and platform-matched (PM) implants. The assessment of multiple systematic reviews (AMSTAR) and Glenny (Checklist) Scales were used to qualify the studies. PubMed, Scientific Electronic Library Online (SciELO), Web of Science (formerly ISI Web of Knowledge), and Cochrane databases were searched, by topic, for systematic reviews on dental implants with switching platforms. A total of 8 systematic reviews, including 7 studies with meta-analyses, were selected. The AMSTAR scale indicated a high (n = 6) to moderate (n = 2) score for the included studies. The quantitative analysis indicated that platform-switching implants preserved more bone tissue when compared with platform-matched implants (6 meta-analyses; P < .001, smaller mean difference: −0.29 mm, 95% CI: −0.38, −0.19 and greater mean difference: −0.49 mm, 95% CI: −0.73, −0.26). Quantitative analysis based on 7 systematic reviews with meta-analysis indicated positive peri-implant bone preservation for implants restored with an implant-abutment mismatching (PSW). Further, there is evidence to improve the design of current systematic reviews. Future systematic reviews in this thematic area should consider searches in gray literature and different databases and include only randomized controlled clinical studies.

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