scholarly journals Effect of Cyclic Precalcification of Nanotubular TiO2Layer on the Bioactivity of Titanium Implant

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Il Song Park ◽  
Eun Jin Yang ◽  
Tae Sung Bae
Keyword(s):  
Titanium Implant ◽  
Treatment Method ◽  
Titanium Implants ◽  
Effective Surface ◽  
Removal Torque ◽  
Self Organized ◽  
Bioactive Properties ◽  
Activation Level ◽  
Anodized Titanium ◽  
Torque Values

The objective of this study is to investigate the effect of cyclic precalcification treatment to impart bioactive properties for titanium implants. Before precalcification, the titanium implants were subjected to blasting using hydroxyapatite (HAp), a resorbable blasting medium (RBM treated), and anodized using an electrolyte containing glycerol, H2O, and NH4F. Precalcification treatment was performed by two different methods, namely, continuous immersion treatment (CIT) and alternate immersion treatment (AIT). In CIT, the RBM treated and anodized titanium implants were immersed in 0.05 M NaH2PO4solution at 80°C and saturated Ca(OH)2solution at 100°C for 20 min, whereas during AIT, they were immersed alternatively in both solutions for 1 min for 20 cycles. Anodizing of the titanium implants enables the formation of self-organized TiO2nanotubes. Cyclic precalcification treatment imparts a better bioactive property and enables an increase in activation level of the titanium implants. The removal torque values of the RBM treated, CIT treated, and AIT treated titanium implants are10.8±3.7 Ncm,17.5±3.5 Ncm, and28.1±2.4 Ncm, respectively. The findings of the study indicate the cyclic precalcification in an effective surface treatment method that would help accelerate osseointegration and impart bioactive property of titanium implants.

The effect of strontium-loaded rough titanium surface on early osseointegration

2017 ◽  
Vol 32 (5) ◽  
pp. 561-569 ◽  
Author(s):  
Jiang Huanhuan ◽  
Hao Pengjie ◽  
Xu Sheng ◽  
Wang Binchen ◽  
Shu Li
Keyword(s):  
Magnetron Sputtering ◽  
Titanium Implant ◽  
Surface Characteristics ◽  
Atomic Ratio ◽  
Area Ratio ◽  
Titanium Implants ◽  
Bone Area ◽  
Bone Apposition ◽  
Removal Torque ◽  
Torque Values

It is not clear whether surface bioactive chemistry plays an important role in the early osseointegration of micro-structured titanium implants that have the same surface topography at the micrometer and submicrometer scales. In this study, magnetron sputtering methodology was employed for the preparation of Sr coating on sandblasted and acid-etched (SLA) titanium implant without changing the surface characteristics. The study of the surface morphology of the coating was carried out with the use of scanning electron microscopy, and the chemical composition of the surface was examined by X-ray energy-dispersive spectrometry. Twenty SLA implants together with 20 Sr-SLA implants were randomly inserted into the proximal tibia of 20 rats. The early osseointegration of the Sr-SLA implant was compared with SLA implant by removal torque test and histological analysis following two and eight weeks of implantation, correspondingly. As revealed by the surface characteristics, both Sr-SLA and SLA surfaces exhibited similar typical isotropic irregular indentations. The strontium ions were effectively incorporated into the SLA surface (the atomic ratio is 2%). Following two and eight weeks of healing, significant increases in removal torque values ( p < 0.05) were taken into observation in respect of Sr-SLA implant. Histologically, the Sr-SLA implants displayed significantly higher bone-to-implant contact percentages and bone area ratio in comparison with the SLA implant at eight weeks ( p < 0.05). At two weeks, the bone-implant contact percentages, together with bone area ratio of Sr-SLA surface appeared to be a little bit slightly greater than that of SLA surface. But the statistical difference was not significant. These results indicated that the chemical modification with Sr incorporated by magnetron sputtering treatment in moderately rough surfaced implants remarkably increases early bone apposition.

scholarly journals Torque Analysis of a Triple Acid-Etched Titanium Implant Surface

2015 ◽  
Vol 2015 ◽  
pp. 1-3 ◽  
Author(s):  
Ana Emília Farias Pontes ◽  
Cássio Torres de Toledo ◽  
Valdir Gouveia Garcia ◽  
Fernando Salimon Ribeiro ◽  
Celso Eduardo Sakakura
Keyword(s):  
Titanium Implant ◽  
Titanium Implants ◽  
Acid Etching ◽  
Subtraction Method ◽  
Implant Surface ◽  
Removal Torque ◽  
Torque Analysis ◽  
Preliminary Study ◽  
Torque Values ◽  
Titanium Implant Surface

The present study aimed to evaluate the removal torque of titanium implants treated with triple acid etching. Twenty-one rats were used in this study. For all animals, the tibia was prepared with a 2 mm drill, and a titanium implant (2 × 4 mm) was inserted after treatment using the subtraction method of triple acid etching. The flaps were sutured. Seven animals were killed 14, 28, and 63 days after implant installation, and the load necessary for removing the implant from the bone was evaluated by using a torque meter. The torque values were as follows: 3.3 ± 1.7 Ncm (14 days), 2.2 ± 1.3 Ncm (28 days), and 6.7 ± 1.4 Ncm (63 days). The torque value at the final healing period (63 days) was statistically significantly different from that at other time points tested (ANOVA,p=0.0002). This preliminary study revealed that treatment with triple acid etching can create a promising and efficient surface for the process of osseointegration.

Removal Torque Analysis of Implants in Rabbit Tibia After Topical Application of Simvastatin Gel

2014 ◽  
Vol 40 (1) ◽  
pp. 53-59 ◽  
Author(s):  
Fatima Neves Faraco-Schwed ◽  
Luiz Macedo Mangueira ◽  
Joao Vitor Albuquerque Ribeiro ◽  
Alexsandro Da Silva Antao ◽  
Jamil Awad Shibli
Keyword(s):  
Topical Application ◽  
Topical Administration ◽  
Titanium Implants ◽  
Removal Torque ◽  
Implant Placement ◽  
Group I ◽  
Torque Wrench ◽  
Rabbit Tibia ◽  
Torque Analysis ◽  
Torque Values

The aim of this study was to evaluate the effects of topical application of simvastatin gel (7.5 mg) on the removal torque of titanium implants in the rabbit tibia. A total of 32 surgeries were performed on 16 New Zealand rabbits for the placement of 2 implants in 1 tibia of each rabbit. Only 1 of the surgical defects was injected with 30 mg/mL of simvastatin gel before implant placement. The initial torque was set at 20 N.cm, and removal torque testing was performed 28 and 56 days postoperatively with a Tonishi torque wrench. Surgical defects were divided into 4 groups: group IG-28 (test, 28 days), group IG-56 (test, 56 days), group I-28 (control, 28 days), and group I-56 (control, 56 days). Removal torque values were higher in group IG-56 than in groups IG-28, I-28, and I-56 (P &lt; .05). Groups IG-28, I-28, and I-56 showed similar values (P &gt; .05). Removal torque force increased under the influence of simvastatin, indicating that topical administration of a 7.5-mg dose of simvastatin gel is effective in improving the torque force required to remove implants inserted in the rabbit tibia.

Does surface anodisation of titanium implants change osseointegration and make their extraction from bone any easier?

2008 ◽  
Vol 21 (03) ◽  
pp. 202-210 ◽  
Author(s):  
J. Langhoff ◽  
J. Mayer ◽  
L. Faber ◽  
S. Kaestner ◽  
G. Guibert ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Titanium Implant ◽  
Titanium Implants ◽  
Implant Surface ◽  
Bone Implant ◽  
High Bone ◽  
Titanium Surfaces ◽  
Anodized Titanium ◽  
Titanium Implant Surface

Summary Objectives: Titanium implants have a tendency for high bone-implant bonding, and, in comparison to stainless steel implants are more difficult to remove. The current study was carried out to evaluate, i) the release strength of three selected anodized titanium surfaces with increased nanohardness and low roughness, and ii) bone-implant bonding in vivo. These modified surfaces were intended to give improved anchorage while facilitating easier removal of temporary implants. Material and methods: The new surfaces were referenced to a stainless steel implant and a standard titanium implant surface (TiMAX™). In a sheep limb model, healing period was 3 months. Bone-implant bonding was evaluated either biomechanically or histologically. Results: The new surface anodized screws demonstrated similar or slightly higher bone-implantcontact (BIC) and torque release forces than the titanium reference. The BIC of the stainless steel implants was significant lower than two of the anodized surfaces (p=0.04), but differences between stainless steel and all titanium implants in torque release forces were not significant (p=0.06). Conclusion: The new anodized titanium surfaces showed good bone-implant bonding despite a smooth surface and increased nanohardness. However, they failed to facilitate implant removal at 3 months.

scholarly journals Comparison of the different voxel sizes in the estimation of peri-implant fenestration defects using cone beam computed tomography: an ex vivo study

2020 ◽  
Vol 6 (1) ◽  
Author(s):  
Mehmet Hakan Kurt ◽  
Nilsun Bağış ◽  
Cengiz Evli ◽  
Cemal Atakan ◽  
Kaan Orhan
Keyword(s):  
Computed Tomography ◽  
Cone Beam Computed Tomography ◽  
Ex Vivo ◽  
Statistical Significance ◽  
Area Under The Curve ◽  
Titanium Implant ◽  
Bone Defects ◽  
Titanium Implants ◽  
Cone Beam ◽  
Voxel Size

Abstract Background To examine the influence of voxel sizes to detect of peri-implant fenestration defects on cone beam computed tomography (CBCT) images. Materials and methods This study performed with three sheep heads both maxilla and mandible and two types of dental implant type 1 zirconium implant (Zr40) (n = 6) and type 2 titanium implant (Ti22) (n = 10). A total of 14 peri-implant fenestrations (8 buccal surfaces, 6 palatal/lingual surface) were created while 18 surfaces (8 buccal, 10 palatal/lingual) were free of fenestrations. Three observers have evaluated the images of fenestration at each site. Images obtained with 0.75 mm3, 0.100 mm3, 0.150 mm3, 0.200 mm3, and 0.400 mm3 voxel sizes. For intra- and inter-observer agreements for each voxel size, Kappa coefficients were calculated. Results Intra- and inter-observer kappa values were the highest for 0.150 mm3, and the lowest in 0.75 mm3 and 0.400 mm3 voxel sizes for all types of implants. The highest area under the curve (AUC) values were found higher for the scan mode of 0.150 mm3, whereas lower AUC values were found for the voxel size for 0.400 mm3. Titanium implants had higher AUC values than zirconium with the statistical significance for all voxel sizes (p ≤ 0.05). Conclusion A voxel size of 0.150 mm3 can be used to detect peri-implant fenestration bone defects. CBCT is the most reliable diagnostic tool for peri-implant fenestration bone defects.

scholarly journals Axial Displacements and Removal Torque Changes of Five Different Implant-Abutment Connections under Static Vertical Loading

Materials ◽  
2020 ◽  
Vol 13 (3) ◽  
pp. 699 ◽  
Author(s):  
Ki-Seong Kim ◽  
Young-Jun Lim
Keyword(s):  
Static Loading ◽  
Testing Machine ◽  
Butt Joint ◽  
Removal Torque ◽  
Vertical Loading ◽  
Implant Abutment ◽  
Before And After ◽  
Masticatory Force ◽  
Torque Values ◽  
Molar Region

The aim of this study was to examine the settling of abutments into implants and the removal torque value under static loading. Five different implant-abutment connections were selected (Ext: external butt joint + two-piece abutment; Int-H2: internal hexagon + two-piece abutment; Int-H1: internal hexagon + one-piece abutment; Int-O2: internal octagon + two-piece abutment; Int-O1: internal octagon + one-piece abutment). Ten implant-abutment assemblies were loaded vertically downward with a 700 N load cell at a displacement rate of 1 mm/min in a universal testing machine. The settling of the abutment was obtained from the change in the total length of the entire implant-abutment unit before and after loading using an electronic digital micrometer. The post-loading removal torque value was compared to the initial torque value with a digital torque gauge. The settling values and removal torque values after 700 N static loading were in the following order, respectively: Ext < Int-H1, Int-H2 < Int-O2 < Int-O1 and Int-O2 < Int-H2 < Ext < Int-H1, Int-O1 (α = 0.05). After 700 N vertical static loading, the removal torque values were statistically different from the initial values, and the post-loading values increased in the Int-O1 group and Int-H1 group (α = 0.05) and decreased in the Ext group, Int-H2 group, and Int-O2 group (α = 0.05). On the basis of the results of this study, it should be taken into consideration that a loss of the preload due to the settling effect can lead to screw loosening during a clinical procedure in the molar region where masticatory force is relatively greater.

scholarly journals Experimental Biointegration of a Titanium Implant in Delayed Mandibular Reconstruction

2020 ◽  
Vol 10 (1) ◽  
pp. 6 ◽  
Author(s):  
Alexander Dolgolev ◽  
Igor Reshetov ◽  
Dmitry Svyatoslavov ◽  
Mikhail Sinelnikov ◽  
Konstantin Kudrin ◽  
...  
Keyword(s):  
Bone Matrix ◽  
Titanium Implant ◽  
Titanium Implants ◽  
Mandibular Reconstruction ◽  
Histological Evaluation ◽  
Plastic Plate ◽  
Extensive Resection ◽  
Bone Integration ◽  
Variable Integration

Background: Mandibular reconstruction, after extensive resection of the mandible for the treatment of oral cancer, is a well-known procedure, however, relatively little is known about bone integration into the titanium implant after reconstruction with a temporary plastic implant. The main goal of this experimental study was to study the process of osseous integration into the titanium implant in an in vivo experiment following prior mandibular reconstruction with a temporary plastic implant. Materials and Methods: Four ewes initially underwent a partial one-sided resection of the mandible, with the formation of an approximately 3 × 1 cm defect. All of the subjects received reconstruction with an implantation of a plastic plate (3 cm). The plastic plate was removed and replaced by a titanium implant at 1, 3, 6, and 12 months, accordingly. Both plastic and titanium implants were made via 3D-printing technology and personalized modeling. A total of 6 months after titanium implantation, a histological evaluation of biointegration was performed. Results: All surgeries were uncomplicated. The integration of osseous tissue into the titanium implant was seen in all cases. Histologically, each case showed variable integration of dense fibrotic tissue with fibroblasts and non-mature bone tissue with a definitive layer of bone matrix with many osteoblasts on the periphery. The prior implantation of the plastic plate did not interfere with bone integration into the titanium implant. Conclusion: Preliminary results demonstrated that a temporary plastic implant for mandibular reconstruction does not interfere with the consequent osseous biointegration of a permanent titanium implant. This shows that temporary reconstruction is a safe solution when delayed mandibular reconstruction is required due to disease severity.

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