Histological and Histomorphometrical Analysis on a Loaded Implant With Platform-Switching and Conical Connection: A Case Report

The association of Morse taper implant-abutment design with the use of a smaller abutment diameter (platform switching) may improve dental implant success rate and prevent peri-implant bone loss. The aim of the present study was to histologically and histomorphometrically evaluate the behavior of peri-implant tissues around an implant with a conical connection associated with platform switching. A platform-switched Morse-cone connection implant was inserted in the left posterior mandible of a 61-year-old patient. The implant was inserted at the level of the alveolar crest. After 11 months from placement and 6 months of loading, the implant was retrieved for psychological reasons and processed for histological evaluation. The retrieved implant was wholly surrounded by bone tissue, except for a small area in the apical portion. At higher magnification, in the coronal portion of the implant, it was possible to observe bone directly at the implant platform level. No resorption of the coronal bone was present, except for 0.2 mm on the vestibular aspect. Crestally, bone remodeling with areas of newly formed bone was detected; the bone-implant contact was 73.9%. Apposition of bone was detected even upon the platform. Peri-implant crestal bone preservation can be achieved with the combination of Morse taper conical internal implant-abutment connection with the use of a smaller abutment diameter (platform-switching).

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

Journal of Oral Implantology ◽

10.1563/aaid-joi-d-19-00114 ◽

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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The effect of different implant abutment materials on the stress distribution to the bone implant contact

Egyptian Dental Journal ◽

10.21608/edj.2020.25438.1062 ◽

2020 ◽

Vol 66 (2) ◽

pp. 1289-1294

Author(s):

abeer younes ◽

Amany korsel ◽

Heba El Tokhey ◽

Khaled Ali ◽

Mohammed Kamel

Keyword(s):

Stress Distribution ◽

Bone Implant ◽

Implant Abutment ◽

Bone Implant Contact

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Analyzing the Effects of the Platform-Switching Procedure on Stresses in the Bone and Implant-Abutment Complex by 3-Dimensional Fem Analysis

Journal of Oral Implantology ◽

10.1563/aaid-joi-d-10-00033 ◽

2012 ◽

Vol 38 (1) ◽

pp. 21-26 ◽

Cited By ~ 7

Author(s):

Haydar Çimen ◽

Esengün Yengin

Keyword(s):

Stress Level ◽

Fem Analysis ◽

Interface Area ◽

Element Analysis ◽

Bone Implant ◽

3 Dimensional ◽

Switching Model ◽

Implant Abutment ◽

Dimensional Finite Element ◽

Platform Switching

The purpose of this study was to investigate the effect of 2 different abutment types on the stress distribution in peri-implant bone and within the implant-abutment complex using 3-dimensional finite element analysis. A simple cylindrical implant (4 × 11 mm) was used in this study for efficacy calculation. One model simulated a 4.00-mm-diameter abutment connection, and the other was narrower, using a 3.2-mm-diameter abutment connection assuming a platform-switching configuration. The stress level in the cervical bone area at the implant was greatly reduced when the narrow-diameter abutment was connected compared with the regular-sized one, despite the fact that the stress level in the implant-abutment complex was increased. The results obtained in the platform-switching model can contribute to reduce the stress level at the implant-bone interface area. Results from this study showed the platform-switching procedure has the biomechanical advantage of shifting the stress concentration area away from the cervical bone-implant interface. The disadvantage of the configuration is the increasing stress in the abutment and implant-abutment junction.

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

Journal of Oral Implantology ◽

10.1563/aaid-joi-d-21-00271 ◽

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).

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Strontium-Loaded Nanotubes of Ti–24Nb–4Zr–8Sn Alloys for Biomedical Implantation

Journal of Biomedical Nanotechnology ◽

10.1166/jbn.2021.3160 ◽

2021 ◽

Vol 17 (9) ◽

pp. 1812-1823

Author(s):

Fei Liu ◽

Xinyu Wang ◽

Shujun Li ◽

Yiheng Liao ◽

Xinxin Zhan ◽

...

Keyword(s):

Early Stage ◽

Contact Rate ◽

Hard Tissue ◽

Tissue Slices ◽

Bone Implant ◽

P Elements ◽

Low Elastic Modulus ◽

Bone Implant Contact

Ti–24Nb–4Zr–8Sn (Ti2448) alloys, with a relatively low elastic modulus and unique mechanical properties, are desirable materials for oral implantation. In the current study, a multifaceted strontium-incorporating nanotube coating was fabricated on a Ti2448 alloy (Ti2-NTSr) through anodization and hydrothermal procedures. In vitro, the Ti2-NTSr specimens demonstrated better osteogenic properties and more favorable osteoimmunomodulatory abilities. Moreover, macrophages on Ti2-NTSr specimens could improve the recruitment and osteogenic differentiation of osteoblasts. In vivo, dense clots with highly branched, thin fibrins and small pores existed on the Ti2-NTSr implant in the early stage after surgery. Analysis of the deposition of Ca and P elements, hard tissue slices and the bone-implant contact rate (BIC%) of the Ti2-NTSr implants also showed superior osseointegration. Taken together, these results demonstrate that the Ti2-NTSr coating may maximize the clinical outcomes of Ti2448 alloys for implantation applications.

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Vertical Bone Implant Contact Around Anterior Immediate Implants and Their Stability After Using Either Alloplast or L-PRF or Both in Peri-Implant Gap: A Prospective Randomized Trial

Journal of Maxillofacial and Oral Surgery ◽

10.1007/s12663-020-01426-8 ◽

2020 ◽

Author(s):

Md Shahbaz Alam ◽

Arjun Dhiman ◽

Veena Jain ◽

Ongkila Bhutia ◽

Gunjan Pruthi

Keyword(s):

Randomized Trial ◽

Prospective Randomized Trial ◽

Bone Implant ◽

Bone Implant Contact ◽

Immediate Implants

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In VivoMicroCT Monitoring of Osteomyelitis in a Rat Model

BioMed Research International ◽

10.1155/2015/587857 ◽

2015 ◽

Vol 2015 ◽

pp. 1-12 ◽

Cited By ~ 13

Author(s):

Vincent A. Stadelmann ◽

Inga Potapova ◽

Karin Camenisch ◽

Dirk Nehrbass ◽

R. Geoff Richards ◽

...

Keyword(s):

Morphological Changes ◽

Orthopedic Implants ◽

Surgical Removal ◽

Element Analysis ◽

Bone Implant ◽

Bone Implant Contact ◽

Bone Changes ◽

Bone Fraction ◽

Microct Imaging

Infection associated with orthopedic implants often results in bone loss and requires surgical removal of the implant. The aim of this study was to evaluate morphological changes of bone adjacent to a bacteria-colonized implant, with the aim of identifying temporal patterns that are characteristic of infection. In anin vivostudy with rats, bone changes were assessed usingin vivomicroCT at 7 time points during a one-month postoperative period. The rats received either a sterile orStaphylococcus aureus-colonized polyetheretherketone screw in the tibia. Bone-implant contact, bone fraction, and bone changes (quiescent, resorbed, and new bone) were calculated from consecutive scans and validated against histomorphometry. The screw pullout strength was estimated from FE models and the results were validated against mechanical testing. In the sterile group, bone-implant contact, bone fraction, and mechanical fixation increased steadily until day 14 and then plateaued. In the infected group, they decreased rapidly. Bone formation was reduced while resorption was increased, with maximum effects observed within 6 days. In summary, the model presented is capable of evaluating the patterns of bone changes due to implant-related infections. The combined use of longitudinalin vivomicroCT imaging and image-based finite element analysis provides characteristic signs of infection within 6 days.

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Anodisation Increases Integration of Unloaded Titanium Implants in Sheep Mandible

BioMed Research International ◽

10.1155/2015/857969 ◽

2015 ◽

Vol 2015 ◽

pp. 1-8 ◽

Cited By ~ 5

Author(s):

Warwick J. Duncan ◽

Min-Ho Lee ◽

Tae-Sung Bae ◽

Sook-Jeong Lee ◽

Jennifer Gay ◽

...

Keyword(s):

Titanium Implant ◽

Titanium Implants ◽

Implant Stability ◽

Bone Implant ◽

Implant Stability Quotient ◽

Phosphate Ions ◽

Surface Control ◽

Bone Implant Contact ◽

The Subject ◽

Clinically Significant

Spark discharge anodic oxidation forms porous TiO2films on titanium implant surfaces. This increases surface roughness and concentration of calcium and phosphate ions and may enhance early osseointegration. To test this, forty 3.75 mm × 13 mm titanium implants (Megagen, Korea) were placed into healed mandibular postextraction ridges of 10 sheep. There were 10 implants per group: RBM surface (control), RBM + anodised, RBM + anodised + fluoride, and titanium alloy + anodised surface. Resonant frequency analysis (RFA) was measured in implant stability quotient (ISQ) at surgery and at sacrifice after 1-month unloaded healing. Mean bone-implant contact (% BIC) was measured in undemineralised ground sections for the best three consecutive threads. One of 40 implants showed evidence of failure. RFA differed between groups at surgery but not after 1 month. RFA values increased nonsignificantly for all implants after 1 month, except for controls. There was a marked difference in BIC after 1-month healing, with higher values for alloy implants, followed by anodised + fluoride and anodised implants. Anodisation increased early osseointegration of rough-surfaced implants by 50–80%. RFA testing lacked sufficient resolution to detect this improvement. Whether this gain in early bone-implant contact is clinically significant is the subject of future experiments.

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