scholarly journals Clinical Significance of Internal Friction Connection and Micro-Threads in Implant-Supported Prostheses: A Literature Review

2020 ◽  
Vol 2 (4) ◽  
Author(s):  
Ki-Won Jeong ◽  
Jeong Chan Kim ◽  
In-Sung Luke Yeo ◽  
Keyword(s):  
Load Transfer ◽  
Structural Features ◽  
Tissue Response ◽  
Marginal Bone Loss ◽  
Load Transfer Mechanism ◽  
Implant Abutment ◽  
Conical Connection ◽  
Bone Level ◽  
Marginal Bone Level

A connection structure using both a screw and friction is advantageous to secure an abutment to an implant. Understanding the biomechanics of the implant-abutment connection is necessary for the long-term clinical survival of a dental implant with decreased complications. The internal conical friction connection structure and micro-threads have shown favorable biological hard tissue response with exceptional structural features. The internal conical connection structure maintains the soft tissue seal and the marginal bone level around the implant. The durability of the implant wall thickness at the top is balanced via micro-threads with the load-transfer mechanism, resulting in proper peri-implant bone strain. These two structural devices are designed to achieve implant-abutment connection stability by redistributing an external load and by minimizing screw loosening events that cause implant component fractures and marginal bone loss.

Marginal Bone Loss Around Implants Supporting Fixed Restorations

2011 ◽  
Vol 37 (5) ◽  
pp. 549-558 ◽  
Author(s):  
Emre Mumcu ◽  
Hakan Bilhan ◽  
Ali Cekici
Keyword(s):  
Bone Loss ◽  
Dental Implants ◽  
Radiographic Evaluation ◽  
Marginal Bone Loss ◽  
Implant Size ◽  
Bone Level ◽  
Marginal Bone Level ◽  
Implant Length

A key criterion of success following dental implants is the marginal bone level. Long-term clinical and radiographic evaluation is necessary to test the results of in vitro studies investigating how cantilevering of restorations or implant size affect bone level changes around implants. There is no consensus on the effect of several variables such as age, gender, implant size, and cantilever prostheses on marginal bone levels around fixed dentures supported by dental implants. Patients who received cemented, fixed restorations supported by implants and who were examined in routine recall sessions 6, 12, 24, and 36 months after loading were included in the study group. Comparative bone level measurements were obtained from images of radiographs at ×20 magnification using the CorelDraw 11.0 software program. Statistical analysis was performed using the Student t test and 1-way analysis of variance. In the 36-month observation period, there were no incidences of implant failure, excessive bone loss around implants, or peri-implant inflammation. One hundred twenty-six implants in 36 patients were evaluated, and the effect of several factors on marginal bone loss (MBL) during the 36 months after loading was analyzed statistically. There was no significant relationship between MBL and implant length or diameter, whereas age, gender, and cantilevers affected bone loss rates. MBL was elevated in older and female patients as well as in patients who received cantilevers. In cases of limiting anatomic conditions, short and/or narrow implants should be preferred over cantilever extensions.

scholarly journals Evaluation of the Peri-Implant Bone Level around Platform-Switched Dental Implants: A Retrospective 3-Year Radiographic Study

2019 ◽  
Vol 16 (14) ◽  
pp. 2570 ◽  
Author(s):  
Yu Hwa Pan ◽  
His Kuei Lin ◽  
Jerry C-Y Lin ◽  
Yung-Szu Hsu ◽  
Yi-Fan Wu ◽  
...  
Keyword(s):  
Bone Loss ◽  
Dental Implants ◽  
Radiographic Study ◽  
Marginal Bone Loss ◽  
Long Term Stability ◽  
Bone Level ◽  
Marginal Bone Level ◽  
The Mean ◽  
Observation Period

Objective: To describe remodeling of the mesial and distal marginal bone level around platform-switched (PS) and platform-matched (PM) dental implants that were sandblasted with large grit and etched with acid over a three-year period. Materials and Methods: Digital periapical radiographs were obtained at the following time-points: during Stage I of the surgical placement of dental implants, before loading, immediately after loading (baseline), and one, three, six, 12, and 36 months after loading for measuring the horizontal and vertical marginal bone levels. Results: Sixty implants were successfully osseointegrated during the overall observation period. Vertical marginal bone levels for the PS and PM dental implants were 0.78 ± 0.77 and 0.98 ± 0.81 mm, respectively, whereas the horizontal marginal bone levels for the PS and PM implants were 0.84 ± 0.45 and 0.98 ± 0.68 mm, respectively. During the time leading up to the procedure until 36 months after the procedure, the average vertical marginal bone level resulted in less bone loss for the PS and PM groups—0.96 ± 1.28 and 0.30 ± 1.15 mm, respectively (p < 0.05). The mean levels of the horizontal marginal bone also showed increases of 0.48 ± 1.01 mm in the PS and 0.37 ± 0.77 mm in the PM groups from the time before loading until 36 months after the procedure. However, these increases were not statistically significant (p > 0.05). Conclusion: PS dental implants appeared to be more effective than PM implants for minimizing the mean marginal vertical and horizontal marginal bone loss during the three-year period. Regardless of which abutment connection was used, the dental implant in the present retrospective investigation exhibited minimal marginal bone remodeling, thus indicating long-term stability.

scholarly journals One-Piece Implants with Smooth Concave Neck to Enhance Soft Tissue Development and Preserve Marginal Bone Levels: A Retrospective Study with 1- to 6-Year Follow-Up

2018 ◽  
Vol 2018 ◽  
pp. 1-7 ◽  
Author(s):  
Jean-Pierre Axiotis ◽  
Paolo Nuzzolo ◽  
Carlo Barausse ◽  
Roberta Gasparro ◽  
Paolo Bucci ◽  
...  
Keyword(s):  
Retrospective Study ◽  
Survival Rates ◽  
Marginal Bone Loss ◽  
Patient Level ◽  
Implant Abutment ◽  
Mucosal Layer ◽  
Bone Level ◽  
Marginal Bone Level ◽  
Over Time

Novel one-piece implants with concave smooth neck have been introduced to promote the formation of a thick mucosal layer and preserve marginal bone. A retrospective study on 70 patients with 1- to 6-year follow-up was carried out. Cumulative survival rates were assessed. Variations of marginal bone level were measured on periapical radiographs as distance of the implant-abutment junction from the bone crest. Influence of different variables on treatment outcome was evaluated. Cumulative success rate after 6 years was 99.4 % at implant level and 98.6 % at patient level. Marginal bone level changed in a significant way over time. After 4 months, an increase of radiographic bone level of 0.173 ± 1.088 mm at implant level and 0.18 ± 1.019 mm at patient level was recorded. Mean marginal bone loss after 5 years was 0.573 ± 0.966 mm at implant level and 0.783 ± 1.213 mm at patient level. Age, sex, smoking habits, implant sites, implant lengths and diameters, prosthetic retentions, and timing of loading did not influence marginal bone remodeling in a statistically significant way. At 4-year follow-up partial restorations lost a mean of 0.96 mm of more marginal bone compared with single restorations. This difference was statistically significant.

Reproducibility and Detection Threshold of Peri-Implant Diagnostics

1993 ◽  
Vol 7 (2) ◽  
pp. 191-195 ◽  
Author(s):  
D. Van Steenberghe ◽  
M. Quirynen
Keyword(s):  
Detection Threshold ◽  
Repeated Measurements ◽  
Marginal Bone Loss ◽  
Oral Implants ◽  
Damping Characteristics ◽  
Bone Level ◽  
Marginal Bone Level ◽  
The Individual ◽  
Attachment Level ◽  
Individual Implant

There is an increasing awareness that, for clinical monitoring of oral implants, there is a need for reliable diagnostics and possibly prognostic parameters. Indeed, reports have too often limited results to an inventory of failures, while no mention was made of progressive marginal bone loss or other symptoms of a future failure. Several parameters, such as marginal bone level assessment and/or probing attachment level, give a precision of up to 0.5 mm. Both measurements also seem related. The damping characteristics of the individual implant/bone unit also offer a highly reproducible diagnostic tool. The Periotest® allows for detection of subclinical mobilities, and 95% of repeated measurements fall within a range of one unit on the arbitrary scale. So far, these three parameters offer no prognostic value.

scholarly journals The Effect of Tapered Abutments on Marginal Bone Level: A Retrospective Cohort Study

2019 ◽  
Vol 8 (9) ◽  
pp. 1305 ◽  
Author(s):  
Simone Marconcini ◽  
Enrica Giammarinaro ◽  
Ugo Covani ◽  
Eitan Mijiritsky ◽  
Xavier Vela ◽  
...  
Keyword(s):  
Cohort Study ◽  
Bone Loss ◽  
Linear Measurement ◽  
Bone Preservation ◽  
Bone Level ◽  
Marginal Bone Level ◽  
Loading Methods ◽  
One Year ◽  
Average Bone

Background: Early peri-implant bone loss has been associated to long-term implant-prosthetic failure. Different technical, surgical, and prosthetic techniques have been introduced to enhance the clinical outcome of dental implants in terms of crestal bone preservation. The aim of the present cohort study was to observe the mean marginal bone level around two-part implants with gingivally tapered abutments one year after loading. Methods: Mean marginal bone levels and change were computed following radiological calibration and linear measurement on standardized radiographs. Results: Twenty patients who met the inclusion criterion of having at least one implant with the tapered prosthetic connection were included in the study. The cumulative implant success rate was 100%, the average bone loss was −0.18 ± 0.72 mm, with the final bone level sitting above the implant platform most of the time (+1.16 ± 0.91 mm). Conclusion: The results of this cohort study suggested that implants with tapered abutments perform successfully one year after loading and that they are associated with excellent marginal bone preservation, thus suggesting that implant-connection macro-geometry might have a crucial role in dictating peri-implant bone levels.

scholarly journals Consecutive Case Series of Healed Single-Molar Sites Immediately Restored with Wide-Diameter Implants: A 1-Year Evaluation

2016 ◽  
Vol 2016 ◽  
pp. 1-8 ◽  
Author(s):  
Hadi Antoun ◽  
Pierre Cherfane ◽  
Bouchra Sojod
Keyword(s):  
Success Rate ◽  
Case Series ◽  
Marginal Bone Loss ◽  
Wide Diameter ◽  
Bone Level ◽  
One Year ◽  
Lost To Follow Up ◽  
Single Crowns

Introduction. To evaluate outcomes of wide-diameter (6 mm) implants immediately provisionalized with cement-retained single crowns in posterior molar sites.Materials and Methods. Forty-eight consecutive patients received a total of 53 moderately rough-surface, 6 mm diameter implants in healed sites. All implants were immediately provisionalized with a cement-retained provisional crown. Final prosthesis with cement-retained porcelain fused to metal crowns was delivered 3–6 months later. Patients were followed up for 1 year. Outcome measures were implant failures and success rate, complications, marginal bone levels, bone level changes, papilla index, bleeding on probing, and inflammation.Results. One patient was lost to follow-up. At one year, the implant survival and success rate were 98.1%. The mean marginal bone loss after 1 year was −0.17±1.84 mm. Ideal papilla score was recorded at 83.8% of the sites. More than 95.6% of the sites showed no bleeding or inflammation. No procedure-related or device-related adverse events were reported.Conclusion. Wide-diameter (6 mm) implants can safely and successfully replace single posterior molars. Longer follow-up studies are necessary to evaluate the long-term success of these implants.

scholarly journals Marginal bone level change around anodized implants with conical connection in the molar region

2018 ◽  
Vol 29 ◽  
pp. 279-279
Author(s):  
Marwa Gdhami Fessi ◽  
Hadi Antoun ◽  
Jérémy Abitbol
Keyword(s):  
Level Change ◽  
Conical Connection ◽  
Bone Level ◽  
Marginal Bone Level ◽  
Molar Region

scholarly journals Does Implant-Abutment Interface affect Marginal Bone Levels around Implants?

2019 ◽  
Vol 13 (01) ◽  
pp. 047-052 ◽  
Author(s):  
Eser Elemek ◽  
Artun Urgancioglu ◽  
Janberd Dincer ◽  
Altug Cilingir
Keyword(s):  
Bone Loss ◽  
Dental Implants ◽  
Marginal Bone Loss ◽  
Single Crown ◽  
Implant Abutment ◽  
Different Types ◽  
Group A ◽  
Group B ◽  
Switch Group

Abstract Objective The use of dental implants with different types of surface roughness and implant-abutment interface has brought about a situation of marginal bone loss. Therefore, the aim of this study was to analyze and compare marginal bone levels of different types of osseointegrated dental implants with platform switch (Group A: Ankylos, Mannheim, Germany) and platform match (Group B: Dentsply Xive, Mannheim, Germany, and Group C: MIS Implant Technologies, Karmiel, Israel). Materials and Methods One hundred and seven patients (52 men and 55 women) with a mean age of 54.79 (standard deviation ± 12.35) years and a total of 321 dental implants (Group A, n = 198; Group B, n = 58; and Group C, n = 65) placed in a private practice between April 2006 and May 2015 were retrospectively analyzed. In addition to demographic information and implant characteristics, marginal bone levels were evaluated by Image J (Wayne Rasband, National Institute of Health, Maryland) program. Results The mean age of all patients was 54.79 ± 12.35 years, and 51.5% of them were women. Implants supporting fixed bridge were most commonly used in all groups (65%), whereas only 20% were restored with a single crown and 15% with overdentures. In total, 47.5% of all implants showed no marginal bone loss. Mean bone loss in Group A was significantly lower (0.81 ± 1.60 mm) as compared to Group B (1.58 ± 1.59 mm) and Group C (1.18 ± 1.36) (p < 0.005). Conclusion Among different types of dental implants, platform switch seems to preserve marginal bone levels and increase the long-term success of dental implants.

scholarly journals Five Degree Internal Conical Connection and Marginal Bone Stability around Subcrestal Implants: A Retrospective Analysis

Materials ◽  
2020 ◽  
Vol 13 (14) ◽  
pp. 3123
Author(s):  
Diego Lops ◽  
Michele Stocchero ◽  
Jason Motta Jones ◽  
Alessandro Freni ◽  
Antonino Palazzolo ◽  
...  
Keyword(s):  
Clinical Evidence ◽  
Multiple Regression Model ◽  
Vertical Position ◽  
Limited Information ◽  
Conical Connection ◽  
Bone Level ◽  
Platform Switching ◽  
Marginal Bone Level

Background: There is limited information on the effect of the connection between subcrestally placed implants and abutments on marginal bone levels. The aim of the present retrospective study was to evaluate marginal bone levels after definitive prosthesis delivery around implants with an internal 5° conical connection placed in a subcrestal position. Materials and methods: Patients treated with fixed prostheses supported by implants placed at a subcrestal level between 2012 and 2018 were recalled for a follow-up examination. All implants had 5° internal conical connection with platform switching. Radiographic marginal bone level (MBL) was measured. MBL change between prosthetic delivery (t0) and follow-up examination (t1) was calculated. A multiple regression model was performed to identify the most significant predictors on MBL change. Results: Ninety-three patients and 410 implants, with a mean follow-up of 2.72 ± 1.31 years, were examined. Mean MBL was −1.09 ± 0.65 mm and −1.00 ± 0.37 mm at t0 and t1, respectively, with a mean bone remodeling of 0.09 ± 0.68 mm. An implant’s vertical position in relation to the bone crest, the year of follow up and the presence of type-2 controlled diabetes were demonstrated to be influencing factors for MBL modifications. Conclusions: Subcrestally placed implants with platform switching and internal conical connection maintained stable bone levels over a mean follow-up of more than 2 years. How a tight internal conical connection between abutment and implant may contribute to this clinical evidence should be more deeply investigated. MBL variations seem to be mostly influenced by an implant’s vertical position and presence of type-2 controlled diabetes.

scholarly journals Evaluation of the Success Criteria for Zirconia Dental Implants: A Four-Year Clinical and Radiological Study

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Andrea Enrico Borgonovo ◽  
Rachele Censi ◽  
Virna Vavassori ◽  
Marcello Dolci ◽  
Josè Luis Calvo-Guirado ◽  
...  
Keyword(s):  
Radiographic Evaluation ◽  
First Year ◽  
Success Rates ◽  
Marginal Bone Loss ◽  
Implant Placement ◽  
Bone Preservation ◽  
Bone Level ◽  
Marginal Bone Level ◽  
The Mean ◽  
Zirconia Implants

Objectives. The aim was to evaluate survival and success rates, soft tissue health, and radiographic marginal bone loss (MBL) of zirconia implants placed in the esthetic and posterior areas of the jaws and in association with multiple or single implant restorations after at least 6 months of definitive restoration.Material and Methods. 35 one-piece zirconium implants were utilized for single or partially edentulous ridges rehabilitation. All implants received immediate temporary restorations and six months after surgery were definitively restored. Every 6 months after implant placement, a clinical-radiographic evaluation was performed. For each radiograph, the measurements of MBL were calculated.Results. The results showed that the mean MBL at 48-month followup was 1.631 mm. The mean MBL during the first year of loading was not more significant for implants placed in the first molar regions than for those positioned in other areas. Moreover, no differences in marginal bone level changes were revealed for multiple and single implants, whereas MBL in the first year was observed to be slightly greater for implants placed in the maxilla than for those placed in the mandible.Conclusion. Zirconia showed a good marginal bone preservation that could be correlated with one-piece morphology and characteristics of zirconia implants.

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