The Use of Small Titanium Screws for Orthodontic Anchorage

2003 ◽  
Vol 82 (5) ◽  
pp. 377-381 ◽  
Author(s):  
T. Deguchi ◽  
T. Takano-Yamamoto ◽  
R. Kanomi ◽  
J.K. Hartsfield ◽  
W.E. Roberts ◽  
...  
Keyword(s):  
Dental Implants ◽  
Contact Analysis ◽  
Lamellar Bone ◽  
Orthodontic Anchorage ◽  
Bone Implant ◽  
Large Size ◽  
Healing Period ◽  
Titanium Screws ◽  
Bone Implant Contact ◽  
Healing Group

The use of conventional dental implants for orthodontic anchorage is limited by their large size. The purpose of this study was to quantify the histomorphometric properties of the bone-implant interface to analyze the use of small titanium screws as an orthodontic anchorage and to establish an adequate healing period. Overall, successful rigid osseous fixation was achieved by 97% of the 96 implants placed in 8 dogs and 100% of the elastomeric chain-loaded implants. All of the loaded implants remained integrated. Mandibular implants had significantly higher bone-implant contact than maxillary implants. Within each arch, the significant histomorphometric indices noted for the “three-week unloaded” healing group were: increased labeling incidence, higher woven-to-lamellar-bone ratio, and increased osseous contact. Analysis of these data indicates that small titanium screws were able to function as rigid osseous anchorage against orthodontic load for 3 months with a minimal (under 3 weeks) healing period.

scholarly journals Bone-Implant Contact around Crestal and Subcrestal Dental Implants Submitted to Immediate and Conventional Loading

2014 ◽  
Vol 2014 ◽  
pp. 1-5 ◽  
Author(s):  
Ana Emília Farias Pontes ◽  
Fernando Salimon Ribeiro ◽  
Giovanna Iezzi ◽  
Juliana Rico Pires ◽  
Elizangela Partata Zuza ◽  
...  
Keyword(s):  
Dental Implants ◽  
Bone Implant ◽  
Anova Test ◽  
Edentulous Mandible ◽  
Bone Implant Contact ◽  
Bone Level

The present study aims to evaluate the influence of apicocoronal position and immediate and conventional loading in the percentage of bone-implant contact (BIC). Thus, 36 implants were inserted in the edentulous mandible from six dogs. Three implants were installed in each hemimandible, in different positions in relation to the ridge: Bone Level (at crestal bone level), Minus 1 (one millimeter apical to crestal bone), and Minus 2 (two millimeters apical to crestal bone). In addition, each hemimandible was submitted to a loading protocol: immediate (prosthesis installed 24 hours after implantation) or conventional (prosthesis installed 120 days after implantation). Ninety days after, animals were killed, and implant and adjacent tissues were prepared for histometric analysis. BIC values from immediate loaded implants were 58.7%, 57.7%, and 51.1%, respectively, while conventional loaded implants were 61.8%, 53.8%, and 68.4%. Differences statistically significant were not observed among groups (P=0.10, ANOVA test). These findings suggest that different apicocoronal positioning and loading protocols evaluated did not interfere in the percentage of bone-implant contact, suggesting that these procedures did not jeopardize osseointegration.

Histologic Evaluation of Human Bone Integration on Machined and Sandblasted Acid-etched Titanium Surfaces in Type IV Bone

2007 ◽  
Vol 33 (1) ◽  
pp. 8-12 ◽  
Author(s):  
Sauro Grassi ◽  
Adriano Piattelli ◽  
Daniel S. Ferrari ◽  
Luciene C. Figueiredo ◽  
Magda Feres ◽  
...  
Keyword(s):  
Pure Titanium ◽  
Surrounding Tissue ◽  
Commercially Pure Titanium ◽  
Machined Surface ◽  
Implant Surface ◽  
Bone Implant ◽  
Healing Period ◽  
Posterior Maxilla ◽  
Bone Implant Contact ◽  
Etched Surface

Abstract The aim of this preliminary study was to evaluate the influence of a sandblasted acid-etched surface on bone-implant contact percentage (BIC%) as well as the bone density in the threads area (BD%) in type 4 bone after 2 months of unloaded healing. Five subjects (mean age = 42.6 years) received 2 microimplants each during conventional implant surgery in the posterior maxilla. The microimplants with commercially pure titanium surface (machined) and sandblasted acid-etched surface served as the control and test surfaces, respectively. After a healing period of 2 months, the microimplants and the surrounding tissue were removed and prepared for ground sectioning and histomorphometric analysis. One microimplant with a machined surface was found to be clinically unstable at the time of retrieval. Histometric evaluation indicated mean BIC% was 20.66 ± 14.54% and 40.08 ± 9.89% for machined and sandblasted acid-etched surfaces, respectively (P = .03). The BD% was 26.33 ± 19.92% for machined surface and 54.84 ± 22.77% for sandblasted acid-etched surface (P = .015). Within the limits of this study, the data suggest that the sandblasted acid-etched implant surface presented a higher percentage of bone-implant contact compared with machined surfaces, under unloaded conditions in posterior maxilla after a healing period of 2 months.

Bone Response to Early Orthodontic Loading of Endosseous Implants

2011 ◽  
Vol 37 (sp1) ◽  
pp. 87-95
Author(s):  
Umit Yavuz ◽  
Tugrul Kirtiloglu ◽  
Gokhan Acikgoz ◽  
Tamer Turk ◽  
Paolo Trisi
Keyword(s):  
Bone Implant ◽  
Endosseous Implants ◽  
Prosthetic Reconstruction ◽  
Implant Placement ◽  
Healing Period ◽  
Bone Response ◽  
Bone Implant Contact ◽  
Bone Trabeculae ◽  
Orthodontic Forces ◽  
And Control

This study evaluated the clinical, radiographic, and histologic responses of tissues surrounding implants loaded with a heavy force of 500g for 20 weeks after a 1-week healing period. Unilateral mandibular and maxillary alveolar ridges in the premolar areas of a male dog and the bilateral mandibular alveolar ridges of a female dog were chosen for implant placement. The control implants (1 in the maxilla, 3 in the mandible) were placed in these quadrants after a 12-week healing period following extraction. The test implants (1 in the maxilla, 3 in the mandible) were implanted in the same quadrants after a 4-month osseointegration period of the control implants. Abutments were attached to the control and test implants after a 1-week healing period for the test implants. Superelastic nickel-titanium coil springs, producing a force of 500g (≈5 N), were activated between control and test implants for 20 weeks. Light microscopic assessment revealed that all implants were well integrated with the bone. Histologic analysis showed no definitive differences between test and control implants in the corticalization of bone trabeculae. The mean bone-implant contact values of the control implants for compression and tension sides were 55.99% and 64.04%, respectively. In the test implants, the bone-implant contact value was 57.27% for the compression side and 62.96% for the tension side. Potential clinical applications of these radiologic and histologic results include the possibility of minimizing the healing duration, even for high orthodontic forces, and the possibility of postorthodontic use of these implants as abutments for supporting prosthetic reconstruction.

Effect on the Amount of Bone-Implant Contact When Splinting Immediate-Loaded Dental Implants

2007 ◽  
Vol 16 (3) ◽  
pp. 309-316 ◽  
Author(s):  
Kenichi Matsuzaka ◽  
Yasushi Nakajima ◽  
Yoshikazu Soejima ◽  
Hirofumi Kido ◽  
Masaro Matsuura ◽  
...  
Keyword(s):  
Dental Implants ◽  
Bone Implant ◽  
Bone Implant Contact

scholarly journals A Narrative Review of the Histological and Histomorphometrical Evaluation of the Peri-Implant Bone in Loaded and Unloaded Dental Implants. A 30-Year Experience (1988–2018)

2020 ◽  
Vol 17 (6) ◽  
pp. 2088 ◽  
Author(s):  
Margherita Tumedei ◽  
Adriano Piattelli ◽  
Marco Degidi ◽  
Carlo Mangano ◽  
Giovanna Iezzi
Keyword(s):  
Dental Implants ◽  
Narrative Review ◽  
Loading Conditions ◽  
Bone Implant ◽  
Bone Implant Contact ◽  
Hard Tissues ◽  
Implant Loading ◽  
The University ◽  
System Selection

Background: The aim of the present review was to assess the histological and histomorphometrical data from the paper published by our Laboratory on peri-implant bone in dental implants in different loading conditions. Methods: The papers published in different implant loading conditions, in dental implants retrieved from humans, and in the Hard Tissues Research Center of the University of Chieti-Pescara, Italy, were screened on MEDLINE/PubMed, Embase, Scopus, and other electronic databases until 31 December 2018. Only articles that reported the histological and histomorphometrical values of the Bone-Implant Contact (BIC) were selected. Results: The system selection provided a total of 155 papers. The manuscripts included for the narrative review were 57. These papers provided histological and histomorphometrical data. Conclusions: The bone remodeling around dental implants was found to be a dynamic process; loading changed the microstructure of the peri-implant bone; and implants were found to provide a successful function, over several decades, with different range of degrees of BIC in vivo (varying from a little more than 30% to a little more than 90%). Loaded implants presented a 10%–12% higher BIC values when compared to submerged, unloaded implants, and rougher surfaces had, on average, about a 10% higher BIC than machined surfaces.

scholarly journals Bone Response to Two Dental Implants with Different Sandblasted/Acid-Etched Implant Surfaces: A Histological and Histomorphometrical Study in Rabbits

2017 ◽  
Vol 2017 ◽  
pp. 1-8 ◽  
Author(s):  
Antonio Scarano ◽  
Adriano Piattelli ◽  
Alesandro Quaranta ◽  
Felice Lorusso
Keyword(s):  
Dental Implants ◽  
Model Experiment ◽  
Scientific Evidence ◽  
Bone Implant ◽  
The Past ◽  
Hydrophilic Surfaces ◽  
Bone Response ◽  
Bone Implant Contact ◽  
Implant Dentistry

Background. Scientific evidence in the field of implant dentistry of the past 20 years established that titanium rough surfaces have shown improved osseointegration rates. In a majority of dental implants, the surface microroughness was obtained by grit blasting and/or acid etching. The aim of the study was to evaluate in vivo two different highly hydrophilic surfaces at different experimental times. Methods. Calcium-modified (CA) and SLActive surfaces were evaluated and a total of 18 implants for each type of surface were positioned into the rabbit articular femoral knee-joint in a split model experiment, and they were evaluated histologically and histomorphometrically at 15, 30, and 60 days of healing. Results. Bone-implant contact (BIC) at the two-implant surfaces was significantly different in favor of the CA surface at 15 days (p=0.027), while SLActive displayed not significantly higher values at 30 (p=0.51) and 60 days (p=0.061). Conclusion. Both implant surfaces show an intimate interaction with newly formed bone.

Thirty Years of Translational Research in Zirconia Dental Implants: A Systematic Review of the Literature

2017 ◽  
Vol 43 (4) ◽  
pp. 314-325 ◽  
Author(s):  
Allauddin Siddiqi ◽  
Abdul Samad Khan ◽  
Sobia Zafar
Keyword(s):  
Animal Models ◽  
Dental Implants ◽  
Zirconia Ceramic ◽  
Computer Search ◽  
Review Of The Literature ◽  
Bone Implant ◽  
Animal Trials ◽  
Bone Implant Contact ◽  
Preclinical Animal Models

Thirty years of transitional research in zirconia (Zr) ceramics has led to significant improvements in the biomedical field, especially in dental implantology. Oral implants made of yttria-tetragonal zirconia polycrystals (Y-TZP) because of their excellent mechanical properties, good biocompatibility, and esthetically acceptable color have emerged as an attractive metal-free alternative to titanium (Ti) implants. The aim of the review was to highlight the translation research in Zr dental implants that has been conducted over the past 3 decades using preclinical animal models. A computer search of electronic databases, primarily PubMed, was performed with the following key words: “zirconia ceramics AND animal trials,” “ceramic implants AND animal trials,” “zirconia AND animal trials,” “zirconia AND in vivo animal trials,” without any language restriction. However, the search was limited to animal trials discussing percentage bone-implant contact (%BIC) around zirconia implants/discs. This search resulted in 132 articles (reviews, in vivo studies, and animal studies) of potential interest. We restricted our search terms to “zirconia/ceramic,” “bone-implant-contact,” and “animal trials” and found 29 relevant publications, which were then selected for full-text reading. Reasons for exclusion included the article's not being an animal study, being a review article, and not discussing %BIC around Zr implants/discs. Most of the studies investigated BIC around Zr in rabbits (30%), pigs (approximately 20%), dogs, sheep, and rats. This review of the literature shows that preclinical animal models can be successfully used to investigate osseointegration around Zr ceramics. Results of the reviewed studies demonstrated excellent %BIC around Zr implants. It should be noted that most of the studies investigated %BIC/removal torque under nonloading conditions, and results would have been somewhat different in functional loading situations because of inherent limitations of Zr ceramics. Further trials are needed to evaluate the performance of Zr ceramics in clinical conditions using implants designed and manufactured via novel techniques that enhance their biomechanical properties.

scholarly journals Macrophagic Inflammatory Response Next to Dental Implants with Different Macro- and Micro-Structure: An In Vitro Study

2021 ◽  
Vol 11 (12) ◽  
pp. 5324
Author(s):  
Maria Menini ◽  
Francesca Delucchi ◽  
Domenico Baldi ◽  
Francesco Pera ◽  
Francesco Bagnasco ◽  
...  
Keyword(s):  
Inflammatory Response ◽  
Dental Implants ◽  
In Vitro Study ◽  
Titanium Implants ◽  
Implant Surface ◽  
Bone Implant ◽  
Optimal Outcomes ◽  
Negative Controls ◽  
Inflammatory Effect

(1) Background: Intrinsic characteristics of the implant surface and the possible presence of endotoxins may affect the bone–implant interface and cause an inflammatory response. This study aims to evaluate the possible inflammatory response induced in vitro in macrophages in contact with five different commercially available dental implants. (2) Methods: one zirconia implant NobelPearl® (Nobel Biocare) and four titanium implants, Syra® (Sweden & Martina), Prama® (Sweden & Martina), 3iT3® (Biomet 3i) and Shard® (Mech & Human), were evaluated. After 4 h of contact of murine macrophage cells J774a.1 with the implants, the total RNA was extracted, transcribed to cDNA and the gene expression of the macrophages was evaluated by quantitative PCR (qPCR) in relation to the following genes: GAPDH, YWHAZ, IL1β, IL6, TNFα, NOS2, MMP-9, MMP-8 and TIMP3. The results were statistically analyzed and compared with negative controls. (3) Results: No implant triggered a significant inflammatory response in macrophages, although 3iT3 exhibited a slight pro-inflammatory effect compared to other samples. (4) Conclusions: All the samples showed optimal outcomes without any inflammatory stimulus on the examined macrophagic cells.

scholarly journals Effect of Osteoporosis on Well-Integrated Bone Implants

2021 ◽  
Vol 11 (2) ◽  
pp. 723
Author(s):  
Amani M. Basudan ◽  
Marwa Y. Shaheen ◽  
Abdurahman A. Niazy ◽  
Jeroen J.J.P. van den Beucken ◽  
John A. Jansen ◽  
...  
Keyword(s):  
Dental Implants ◽  
Femoral Condyle ◽  
Bone Implants ◽  
Bone Implant ◽  
Ovx Rats ◽  
Bone Response ◽  
Significant Difference ◽  
Female Wistar Rats ◽  
Edentulous Patients

The installation of dental implants has become a common treatment for edentulous patients. However, concern exists about the influence of osteoporosis on the final implant success. This study evaluated whether an ovariectomy (OVX)-induced osteoporotic condition, induced eight weeks postimplantation in a rat femoral condyle, influences the bone response to already-integrated implants. The implants were inserted in the femoral condyle of 16 female Wistar rats. Eight weeks postimplantation, rats were randomly ovariectomized (OVX) or sham-operated (SHAM). Fourteen weeks later, animals were sacrificed, and implants were used for histological and histomorphometric analyses. A significant reduction in the quantity and quality of trabecular bone around dental implants existed in OVX rats in comparison to the SHAM group. For histomorphometric analysis, the bone area (BA%) showed a significant difference between OVX (34.2 ± 4.3) and SHAM (52.6 ± 12.7) groups (p < 0.05). Bone–implant contact (BIC%) revealed significantly lower values for all implants in OVX (42.5 ± 20.4) versus SHAM (59.0 ± 19.0) rats. Therefore, induction of an osteoporotic condition eight weeks postimplantation in a rat model negatively affects the amount of bone present in close vicinity to bone implants.

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