Relationship between Implant Geometry and Primary Stability in Different Bony Defects and Variant Bone Densities: An In Vitro Study

Aim: This in vitro study aimed to evaluate the effects of implant designs on primary stability in different bone densities and bony defects. Methods: Five implant types (tapered-tissue-level, tissue-level, zirconia-tissue-level, bone-level, and BLX implants) were used in this assessment. The implants were inserted into four different artificial bone blocks representing varying bone-density groups: D1, D2, D3, and D4. Aside from the control group, three different types of defects were prepared. Using resonance frequency analysis and torque-in and -out values, the primary stability of each implant was evaluated. Results: With an increased defect size, all implant types presented reduced implant stability values measured by the implant stability quotient (ISQ) values. Loss of stability was the most pronounced around circular defects. Zirconia and bone-level implants showed the highest ISQ values, whereas tissue level titanium implants presented the lowest stability parameters. The implant insertion without any thread cut led to a small improvement in primary implant stability in all bone densities. Conclusions: Compared with implants with no peri-implant defects, the three-wall and one-wall defect usually did not provide significant loss of primary stability. A significant loss of stability should be expected when inserting implants into circular defects. Implants with a more aggressive thread distance could increase primary stability.

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Impact of Bone Quality and Implant Type on the Primary Stability: An Experimental Study Using Bovine Bone

Journal of Oral Implantology ◽

10.1563/aaid-joi-d-11-00156 ◽

2015 ◽

Vol 41 (2) ◽

pp. 144-148 ◽

Cited By ~ 7

Author(s):

Sukumaran Anil ◽

Abdullah Alfarraj Aldosari

Keyword(s):

Bone Quality ◽

In Vitro Study ◽

Primary Stability ◽

Tissue Level ◽

Bovine Bone ◽

Type Ii ◽

Removal Torque ◽

Type Iv ◽

Bone Level

The purpose of this in vitro study was to compare the primary stability and removal torque of bone level and tissue level implants in different bone qualities. Twenty tissue level and bone level implants (3.3 × 10 mm and 4.1 × 10 mm) were used for assessing the stability in type II and type IV bone. Forty bovine rib blocks were used in this study. The primary stability of the implant was measured by the resonance frequency using an Osstel device. The removal torque values (RTV) of the implants was assessed using a digital torque gauge instrument. The implant stability quotient (ISQ) values and the RTV showed a marginally higher stability with bone level implants as compared to tissue level implants. However, these differences were not statistically significant in both type of bone used (P > 0.05). On the other hand, compared to type IV, type II bone showed significant differences in the ISQ (P < 0.01) and RTV (P < 0.001) of bone level and tissue level implants. The study concluded that bone quality is an important factor in establishing primary stability than the implant dimension. Bone level and tissue level implants of same dimensions can be selected based on the esthetic demands since they showed similar mechanical properties.

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Comparison of Measurements of Implant Stability by Two Different Radio Frequency Analysis Systems: An In Vitro Study

Journal of Advanced Oral Research ◽

10.1177/2320206820923251 ◽

2020 ◽

Vol 11 (2) ◽

pp. 202-207

Author(s):

Cenker Zeki Koyuncuoglu ◽

Becen Demir

Keyword(s):

Radio Frequency ◽

Frequency Analysis ◽

Intraclass Correlation ◽

In Vitro Study ◽

Vitro Study ◽

Bovine Bone ◽

Implant Stability ◽

Bone Level ◽

The Relationship

Aim: To compare and evaluate the implant stability quotient (ISQ) measurements by two different radio frequency analysis (RFA) machines, Osstell Mentor and PenguinRFA. Materials and Methods: Twenty bone-level implants (3.7 × 10 mm2) were placed on a bovine bone in this in vitro study. The ISQ measurements were performed with the PenguinRFA and Osstell Mentor machines using the multipeg of the Penguin system. The measurements were repeated three times for each direction and an average ISQ value was calculated. The results were averaged (mean ± SD) and the intraclass correlation coefficient (ICC) was calculated to assess the relationship between the measurements. Result: The mean ISQ values for the Osstell and Penguin machines were 77.60 + 2.11 and 78.05 + 2.04, respectively. The ICC was 0.958. The ISQ values obtained from the Osstell and Penguin machines were significantly compatible ( P < .05). Conclusion: Both of the RFA devices provided similar and reliable ISQ measurements.

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Potential neurotoxicity of titanium implants: Prospective, in-vivo and in-vitro study

Biomaterials ◽

10.1016/j.biomaterials.2021.121039 ◽

2021 ◽

pp. 121039

Author(s):

Shahar Shelly ◽

Sigal Liraz Zaltsman ◽

Ofir Ben-Gal ◽

Avraham Dayan ◽

Ithamar Ganmore ◽

...

Keyword(s):

In Vitro Study ◽

Titanium Implants ◽

Vitro Study

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The Effectiveness of Chlorhexidine and Air Polishing System in the Treatment of Candida albicans Infected Dental Implants: An Experimental In Vitro Study

Antibiotics ◽

10.3390/antibiotics9040179 ◽

2020 ◽

Vol 9 (4) ◽

pp. 179 ◽

Cited By ~ 4

Author(s):

Pier Carmine Passarelli ◽

Marta De Leonardis ◽

Giovan Battista Piccirillo ◽

Viviana Desantis ◽

Raffaele Papa ◽

...

Keyword(s):

Candida Albicans ◽

Sodium Bicarbonate ◽

Rough Surfaces ◽

In Vitro Study ◽

Titanium Implants ◽

Vitro Study ◽

Term Survival ◽

Air Polishing ◽

Scanning Electron

Background: Peri-implantitis is an inflammatory disease with an increasing diffusion rate which can affect the long-term survival of a prosthetic rehabilitation. The present study focused on the decontaminating efficacy of chlorhexidine and air polishing system with sodium bicarbonate powder against Candida albicans, a microorganism which seems to have a superinfecting opportunistic role in the pathology. The aim of the authors was to investigate and compare the effectiveness of these treatments, commonly used in clinical practice. Methods: An in vitro study was conducted to analyze the effects of two widely used therapeutic aids for the disinfection of affected titanium implants: chlorhexidine (CHX) and air polishing with sodium bicarbonate powder (P). A qualitative and quantitative comparative analysis of the residual biofilm was carried out using a colorimetric assay (XTT) and scanning electron microscopy (SEM) observation. The experiment was conducted both on machined titanium surfaces and on rough sandblasted ones with the aim of bringing out differences in the therapeutic outcomes concerning the superficial texture of the implant. The null hypothesis was that no difference could be detected between the samples, regarding both the treatments performed and the nano-structural features of titanium. Results: The best results (on both types of implant surfaces) were obtained when combining the use of chlorhexidine and air polishing (C + P). A linear decrease in the optical density (OD) values recorded at three different time points (30 s, 1 min, 5 min) was also observed passing from the first to the last one. When observed under scanning electron microscope rough surfaces showed an extensive and highly structured biofilm, more complex if compared to the one encountered when analyzing machined implants. Conclusions: the present pilot study showed that rough surfaces can promote fungal adhesion and eventually hinder the outcome of a decontaminating treatment. For this purpose, the physio-chemical technique is always more efficient if compared to a single-technique approach regardless of the surface characteristics.

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