1
|
Zamparini F, Gandolfi MG, Spinelli A, Ferri M, Iezzi G, Botticelli D, Prati C. Mineralization and morphology of peri-implant bone around loaded and unloaded dental implants retrieved from the human mandible. Oral Maxillofac Surg 2024; 28:623-637. [PMID: 37667130 PMCID: PMC11144681 DOI: 10.1007/s10006-023-01175-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2023] [Accepted: 08/12/2023] [Indexed: 09/06/2023]
Abstract
PURPOSE Limited data is reported regarding the bone mineralization around dental implants in the first months from insertion. The study analyzed the peri-implant bone around loaded and unloaded implants retrieved from human mandible after 4 months from placement. METHOD The composition and mineralization of human bone were analyzed through an innovative protocol technique using Environmental-Scanning-Electron-Microscopy connected with Energy-Dispersive-X-Ray-Spectroscopy (ESEM/EDX). Two regions of interest (ROIs, approximately 750×500 μm) for each bone implant sample were analyzed at the cortical (Cortical ROI) and apical (Apical ROI) implant threads. Calcium, phosphorus, and nitrogen (atomic%) were determined using EDX, and the specific ratios (Ca/N, P/N, and Ca/P) were calculated as mineralization indices. RESULTS Eighteen implant biopsies from ten patients were analyzed (unloaded implants, n=10; loaded implants, n=8). For each ROI, four bone areas (defined bones 1-4) were detected. These areas were characterized by different mineralization degree, varied Ca, P and N content, and different ratios, and by specific grayscale intensity detectable by ESEM images. Bony tissue in contact with loaded implants at the cortical ROI showed a higher percentage of low mineralized bone (bone 1) and a lower percentage of remodeling bone (bone 2) when compared to unloaded implants. The percentage of highly mineralized bone (bone 3) was similar in all groups. CONCLUSION Cortical and apical ROIs resulted in a puzzle of different bone "islands" characterized by various rates of mineralization. Only the loaded implants showed a high rate of mineralization in the cortical ROI.
Collapse
Affiliation(s)
- Fausto Zamparini
- Laboratory of Biomaterials and Oral Pathology, Department of Biomedical and Neuromotor Sciences, School of Dentistry, University of Bologna, 40126, Bologna, Italy.
- Endodontic Clinical Section, Department of Biomedical and Neuromotor Sciences, School of Dentistry, University of Bologna, 40126, Bologna, Italy.
| | - Maria Giovanna Gandolfi
- Laboratory of Biomaterials and Oral Pathology, Department of Biomedical and Neuromotor Sciences, School of Dentistry, University of Bologna, 40126, Bologna, Italy
| | - Andrea Spinelli
- Endodontic Clinical Section, Department of Biomedical and Neuromotor Sciences, School of Dentistry, University of Bologna, 40126, Bologna, Italy
| | - Mauro Ferri
- School of Dentistry, Corporación Universitária Rafael Núñez, 130001, Cartagena, de Indias, Colombia
| | - Giovanna Iezzi
- Department of Medical Oral and Biotechnological Sciences, University of Chieti/Pescara, 66013, Chieti, Italy
| | | | - Carlo Prati
- Endodontic Clinical Section, Department of Biomedical and Neuromotor Sciences, School of Dentistry, University of Bologna, 40126, Bologna, Italy
| |
Collapse
|
2
|
Jang HJ, Yoon JU, Joo JY, Lee JY, Kim HJ. Effects of a simplified drilling protocol at 50 rpm on heat generation under water-free conditions: an in vitro study. J Periodontal Implant Sci 2022; 53:85-95. [PMID: 36468469 PMCID: PMC9943703 DOI: 10.5051/jpis.2201400070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Revised: 04/22/2022] [Accepted: 06/02/2022] [Indexed: 11/08/2022] Open
Abstract
PURPOSE In recent years, guided implant surgery has been widely used for the convenience of patients and surgeons. Further streamlining the surgical procedure would make implant surgery more convenient. Low-speed water-free conditions are often used in guided implant surgery. Therefore, in this study, we attempted to confirm once again whether drilling was safe at a low speed without water. The main purpose of this study was to evaluate whether a simplified drilling protocol that omits some intermediate steps in the drilling process was safe from the viewpoint of heat generation. METHODS D1 density artificial bone blocks were drilled under 50 rpm, 10 N·cm water-free conditions, and the surface temperature was measured using a digital infrared camera. First, drilling was performed with the sequential drilling method, which is the most widely used technique. Second, for each drill diameter, the temperature change was measured while performing simplified drilling with omission of the previous 1, 2, or 3 steps. RESULTS In sequential drilling, the heat generated during drilling at all diameters was less than the critical temperature of osteonecrosis (47°C) except for the ⌀2 drill. Statistical significance was observed in all groups when comparing sequential and simplified drilling in the ⌀3.2, ⌀3.8, and ⌀4.3 drills (P<0.001). However, in the simplified drilling procedures, the temperature was below the osteonecrosis threshold temperature (47°C) except for the ⌀4.3 drill with the omission of the previous 3 steps (⌀3.0, ⌀3.2, and ⌀3.8). CONCLUSIONS In general, drilling under low-speed, water-free conditions has shown stable results in terms of heat generation. Simplified drilling showed statistically significantly greater heat generation than sequential drilling. However, most of the diameters and omitted steps seem to be clinically acceptable, so it will be useful if an appropriate selection is made according to the patient's clinical condition.
Collapse
Affiliation(s)
- Hyeon-Ji Jang
- Department of Periodontology, Dental and Life Science Institute, School of Dentistry, Pusan National University, Yangsan, Korea.,Department of Periodontology and Dental Research Institute, Pusan National University Dental Hospital, Yangsan, Korea
| | - Jin-Un Yoon
- Department of Periodontology, Dental and Life Science Institute, School of Dentistry, Pusan National University, Yangsan, Korea.,Department of Periodontology and Dental Research Institute, Pusan National University Dental Hospital, Yangsan, Korea
| | - Ji-Young Joo
- Department of Periodontology, Dental and Life Science Institute, School of Dentistry, Pusan National University, Yangsan, Korea.,Department of Periodontology and Dental Research Institute, Pusan National University Dental Hospital, Yangsan, Korea
| | - Ju-Youn Lee
- Department of Periodontology, Dental and Life Science Institute, School of Dentistry, Pusan National University, Yangsan, Korea.,Department of Periodontology and Dental Research Institute, Pusan National University Dental Hospital, Yangsan, Korea
| | - Hyun-Joo Kim
- Department of Periodontology, Dental and Life Science Institute, School of Dentistry, Pusan National University, Yangsan, Korea.,Department of Periodontology and Dental Research Institute, Pusan National University Dental Hospital, Yangsan, Korea.
| |
Collapse
|
3
|
Blanc-Sylvestre N, Bouchard P, Chaussain C, Bardet C. Pre-Clinical Models in Implant Dentistry: Past, Present, Future. Biomedicines 2021; 9:1538. [PMID: 34829765 PMCID: PMC8615291 DOI: 10.3390/biomedicines9111538] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2021] [Revised: 10/11/2021] [Accepted: 10/15/2021] [Indexed: 12/23/2022] Open
Abstract
Biomedical research seeks to generate experimental results for translation to clinical settings. In order to improve the transition from bench to bedside, researchers must draw justifiable conclusions based on data from an appropriate model. Animal testing, as a prerequisite to human clinical exposure, is performed in a range of species, from laboratory mice to larger animals (such as dogs or non-human primates). Minipigs appear to be the animal of choice for studying bone surgery around intraoral dental implants. Dog models, well-known in the field of dental implant research, tend now to be used for studies conducted under compromised oral conditions (biofilm). Regarding small animal models, research studies mostly use rodents, with interest in rabbit models declining. Mouse models remain a reference for genetic studies. On the other hand, over the last decade, scientific advances and government guidelines have led to the replacement, reduction, and refinement of the use of all animal models in dental implant research. In new development strategies, some in vivo experiments are being progressively replaced by in vitro or biomaterial approaches. In this review, we summarize the key information on the animal models currently available for dental implant research and highlight (i) the pros and cons of each type, (ii) new levels of decisional procedures regarding study objectives, and (iii) the outlook for animal research, discussing possible non-animal options.
Collapse
Affiliation(s)
- Nicolas Blanc-Sylvestre
- Université de Paris, Institut des Maladies Musculo-Squelettiques, Orofacial Pathologies, Imaging and Biotherapies Laboratory URP2496 and FHU-DDS-Net, Dental School, and Plateforme d’Imagerie du Vivant (PIV), 92120 Montrouge, France; (N.B.-S.); (P.B.); (C.C.)
- AP-HP, Department of Periodontology, Rothschild Hospital, European Postgraduate in Periodontology and Implantology, Université de Paris, 75012 Paris, France
| | - Philippe Bouchard
- Université de Paris, Institut des Maladies Musculo-Squelettiques, Orofacial Pathologies, Imaging and Biotherapies Laboratory URP2496 and FHU-DDS-Net, Dental School, and Plateforme d’Imagerie du Vivant (PIV), 92120 Montrouge, France; (N.B.-S.); (P.B.); (C.C.)
- AP-HP, Department of Periodontology, Rothschild Hospital, European Postgraduate in Periodontology and Implantology, Université de Paris, 75012 Paris, France
| | - Catherine Chaussain
- Université de Paris, Institut des Maladies Musculo-Squelettiques, Orofacial Pathologies, Imaging and Biotherapies Laboratory URP2496 and FHU-DDS-Net, Dental School, and Plateforme d’Imagerie du Vivant (PIV), 92120 Montrouge, France; (N.B.-S.); (P.B.); (C.C.)
- AP-HP, Reference Center for Rare Disorders of the Calcium and Phosphate Metabolism, Dental Medicine Department, Bretonneau Hospital, GHN-Université de Paris, 75018 Paris, France
| | - Claire Bardet
- Université de Paris, Institut des Maladies Musculo-Squelettiques, Orofacial Pathologies, Imaging and Biotherapies Laboratory URP2496 and FHU-DDS-Net, Dental School, and Plateforme d’Imagerie du Vivant (PIV), 92120 Montrouge, France; (N.B.-S.); (P.B.); (C.C.)
| |
Collapse
|
4
|
da Silva RLB, Duailibi Neto EF, Todescan FF, Ruiz GM, Pannuti CM, Chilvarquer I. Evaluation of cervical peri-implant optical density in longitudinal control of immediate implants in the anterior maxilla region. Dentomaxillofac Radiol 2020; 49:20190396. [PMID: 32364770 DOI: 10.1259/dmfr.20190396] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVE This research aimed to longitudinally evaluate the optical density of peri-implant alveolar bone. The data acquired from study participants previously treated with 37 osseointegrated implants were analyzed utilizing the radiographic subtraction technique. METHODS AND MATERIALS The radiographic follow-ups were performed five times: at the implantation of the prostheses and after 15, 90, 180 and 360 days. Intraoral radiographs were obtained by the paralleling technique using individualized Hanshin-type positioners to guarantee the standardization of the images. The obtained digital images were aligned and equalized before they were submitted to the radiographic subtraction procedure. RESULTS A significant difference was found between the distal region of Group I (patients treated with osseointegrated implants who required extraction of the dental element) and the 360 day follow-up and the distal region of Group II (patients with healed alveolar sockets) in all follow-up analyses (p < 0.05). We did not observe a significant difference between the groups analyzed and other follow-ups concerning the subcrestal and middle third regions for both the mesial and distal variables (p > 0.05). There was a statistically significant difference in the distal sites [χ2 = 5,745,, p = 0.03], showing a significant association between time and the presence of bone resorption. This association was not shown on the mesial surface (p = 0.16). CONCLUSION We concluded that there was no statistically significant difference between groups I and II. Using this technique, we were able to quantitatively and qualitatively evaluate the changes in the proximal sites on the digital radiographic images for the analyzed data. Digital subtraction technology to measure peri-implant bone density is an accurate and reproducible technique for quantifying peri-implant bone reactions to different therapeutic modalities.
Collapse
Affiliation(s)
| | | | | | - Glaucio Morente Ruiz
- Foundation FUNDECTO, School of Dentistry, University of São Paulo, São Paulo, Brazil
| | - Claudio Mendes Pannuti
- Department of Stomatology, School of Dentistry, University of São Paulo, São Paulo, Brazil
| | - Israel Chilvarquer
- Department of Stomatology, School of Dentistry, University of São Paulo, São Paulo, Brazil
| |
Collapse
|
5
|
Almassri HNS, Ma Y, Dan Z, Ting Z, Cheng Y, Wu X. Implant stability and survival rates of a hydrophilic versus a conventional sandblasted, acid-etched implant surface: Systematic review and meta-analysis. J Am Dent Assoc 2020; 151:444-453. [PMID: 32450983 DOI: 10.1016/j.adaj.2020.03.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2019] [Revised: 02/27/2020] [Accepted: 03/05/2020] [Indexed: 01/10/2023]
Abstract
BACKGROUND Modifying the implant surface via enhancing the wettability (hydrophilicity) improves osseointegration, reducing the healing period. In this study, the authors aimed to evaluate the stability and survival rates of implants with a hydrophilic surface compared with those with a sandblasted, acid-etched surface. TYPES OF STUDIES REVIEWED The included studies (randomized controlled trials) were identified through searches of PubMed, ScienceDirect, and Cochrane Library databases without date of publication restrictions. Quality assessment was performed using the Cochrane Collaboration tool. For primary outcome, confidence intervals were set at 95%; weighted means across the studies were calculated using a fixed-effects model or risk ratios and their 95% confidence intervals for secondary outcome. RESULTS The authors included 5 randomized controlled trials (246 dental implants) in the systematic review, which compared a hydrophilic with conventional sandblasted, acid-etched implant surface. The implant stability (primary outcome) was measured at baseline and 3, 6, and 8 weeks, and implant survival rates were measured as a secondary outcome. Overall, compared with the control groups, no clinically significant differences in implant stability or survival rates were identified for the hydrophilic surface groups. CONCLUSIONS AND PRACTICAL IMPLICATIONS The results did not show any clinically significant effect of a hydrophilic surface on improving implant stability or survival rates. However, these findings must be analyzed carefully owing to the limitations of this review, such as the small samples size and some differences among the included studies.
Collapse
|
6
|
Alves-Rezende MCR, Capalbo LC, De Oliveira Limírio JPJ, Capalbo BC, Limírio PHJO, Rosa JL. The role of TiO 2 nanotube surface on osseointegration of titanium implants: Biomechanical and histological study in rats. Microsc Res Tech 2020; 83:817-823. [PMID: 32227674 DOI: 10.1002/jemt.23473] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2019] [Revised: 01/08/2020] [Accepted: 03/08/2020] [Indexed: 01/03/2023]
Abstract
The nanoscale surface of titanium has been studied to improve the cellular recognition of the biological microenvironment and to increase bone-implant interaction. The aim of this study was to analyze the effect of a titanium oxide (TiO2 ) nanotube surface with a machined surface on osseointegration tibia implants without primary stability. This study used an experimental design, divided into two groups (n = 16): commercially pure titanium machined implants (Cp-Ti Ma) and commercially pure titanium anodized implants (Cp-Ti An). Titanium nanotubes were produced by anodic oxidation, and the topography of surface was analyzed using field emission scanning microscope (FE-SEM). The implants (2.1 × 2.8 mm Ø) were surgically placed in the right tibia (defects with milling drill 2.5 × 3.2 mm Ø) of 32 Wistar male rats (250-300 g). The animals were euthanized at 7 weeks postoperatively. The maximum value of removal torque was measured (N/cm) in the right tibia half of each group (8 animals/8 tibiae); the other half of each group underwent a nondecalcified protocol, stained with Stevenel blue/Alizarin red, and the formation of bone tissue in close contact to the implant was measured. The obtained data were analyzed statistically (t test). Differences were considered statistically significant for α < 0.05. Cp-Ti An implants were significantly higher in removal torque and peri-implant bone healing compared with Cp-Ti Ma implants (p < .01). Within the limitations of this study, it was observed that the surface modification of titanium by anodization (TiO2 nanotubes) can improve osseointegration, and this may be very useful to reduce the time required for peri-implant bone formation.
Collapse
Affiliation(s)
- Maria C R Alves-Rezende
- Department of Dental Materials and Prosthodontics, Sao Paulo State University (UNESP), Araçatuba, Brazil
| | - Letícia C Capalbo
- Department of Dental Materials and Prosthodontics, Sao Paulo State University (UNESP), Araçatuba, Brazil
| | | | - Bruna C Capalbo
- Department of Dental Materials and Prosthodontics, Sao Paulo State University (UNESP), Araçatuba, Brazil
| | - Pedro H J O Limírio
- Integrated Dental Clinic Program, Faculty of Dentistry, Federal University of Uberlândia, Brazil
| | - Jorge L Rosa
- Lorena School of Engineering, Sao Paulo University, USP, Lorena, Brazil
| |
Collapse
|
7
|
Pantawane MV, Ho YH, Robertson WB, Khan RJK, Fick DP, Dahotre NB. Thermal Assessment of Ex Vivo Laser Ablation of Cortical Bone. ACS Biomater Sci Eng 2020; 6:2415-2426. [PMID: 33455309 DOI: 10.1021/acsbiomaterials.9b01559] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
As a potential osteotomy tool, laser ablation is expected to provide rapid machining of bone, while generating minimal thermal damage (carbonization) and physical attributes within the machined region conducive to healing. As these characteristics vary with laser parameters and modes of laser operation, the clinical trials and in vivo studies render it difficult to explore these aspects for optimization of the laser machining parameters. In light of this, the current work explores various thermal and microstructural aspects of laser-ablated cortical bone in ex vivo study to understand the fundamentals of laser-bone interaction using computational modeling. The study employs the Yb-fiber Nd:YAG laser (λ = 1064 nm) in the continuous wave mode to machine the femur section of bovine bone by a three-dimensional machining approach. The examination involved thermal analysis using differential scanning calorimetry and thermogravimetry, phase analysis using X-ray diffractometry, qualitative analysis using X-ray photoelectron spectroscopy, and microstructural and semiquantitative analysis using scanning electron microscopy equipped with energy-dispersive spectrometry. The mechanism of efficient bone ablation using the Nd:YAG laser was evaluated using the computational thermokinetics outcome. The use of high laser fluence (10.61 J/mm2) was observed to be efficient to reduce the residual amorphous carbon in the heat-affected zone while achieving removal of the desired volume of the bone material at a rapid rate. Minimal thermal effects were predicted through computational simulation and were validated with the experimental outcome. In addition, this work reveals the in situ formation of a scaffold-like structure in the laser-machined region which can be conducive during healing.
Collapse
Affiliation(s)
- Mangesh V Pantawane
- Laboratory for Laser Aided Additive and Subtractive Manufacturing, Virtual Center for Advanced Orthopedics, Department of Materials Science and Engineering, University of North Texas, 1155 Union Circle-305310, Denton, Texas 76203-5017, United States
| | - Yee-Hsien Ho
- Laboratory for Laser Aided Additive and Subtractive Manufacturing, Virtual Center for Advanced Orthopedics, Department of Materials Science and Engineering, University of North Texas, 1155 Union Circle-305310, Denton, Texas 76203-5017, United States
| | - William B Robertson
- Laboratory for Laser Aided Additive and Subtractive Manufacturing, Virtual Center for Advanced Orthopedics, Department of Materials Science and Engineering, University of North Texas, 1155 Union Circle-305310, Denton, Texas 76203-5017, United States.,Australian Institute of Robotics Orthopedics, 2 Centro Avenue, Subiaco, Western Australia 6008, Australia.,Department of Computing School of Electrical Engineering and Computing, Curtin University, Kent Street, Bentley, Western Australia 6102, Australia
| | - Riaz J K Khan
- Laboratory for Laser Aided Additive and Subtractive Manufacturing, Virtual Center for Advanced Orthopedics, Department of Materials Science and Engineering, University of North Texas, 1155 Union Circle-305310, Denton, Texas 76203-5017, United States.,Australian Institute of Robotics Orthopedics, 2 Centro Avenue, Subiaco, Western Australia 6008, Australia.,Department of Computing School of Electrical Engineering and Computing, Curtin University, Kent Street, Bentley, Western Australia 6102, Australia.,The Joint Studio, Hollywood Medical Centre, 85 Monash Avenue, Nedlands, Western Australia 6009, Australia
| | - Daniel P Fick
- Laboratory for Laser Aided Additive and Subtractive Manufacturing, Virtual Center for Advanced Orthopedics, Department of Materials Science and Engineering, University of North Texas, 1155 Union Circle-305310, Denton, Texas 76203-5017, United States.,Australian Institute of Robotics Orthopedics, 2 Centro Avenue, Subiaco, Western Australia 6008, Australia.,Department of Computing School of Electrical Engineering and Computing, Curtin University, Kent Street, Bentley, Western Australia 6102, Australia.,The Joint Studio, Hollywood Medical Centre, 85 Monash Avenue, Nedlands, Western Australia 6009, Australia
| | - Narendra B Dahotre
- Laboratory for Laser Aided Additive and Subtractive Manufacturing, Virtual Center for Advanced Orthopedics, Department of Materials Science and Engineering, University of North Texas, 1155 Union Circle-305310, Denton, Texas 76203-5017, United States
| |
Collapse
|
8
|
Effect of Rough Surface Platforms on the Mucosal Attachment and the Marginal Bone Loss of Implants: A Dog Study. MATERIALS 2020; 13:ma13030802. [PMID: 32050603 PMCID: PMC7040816 DOI: 10.3390/ma13030802] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Revised: 02/03/2020] [Accepted: 02/09/2020] [Indexed: 11/16/2022]
Abstract
The preservation of peri-implant tissues is an important factor for implant success. This study aimed to assess the influence of the surface features of a butt-joint platform on soft-tissue attachment and bone resorption after immediate or delayed implant placement. All premolars and first molars of eight Beagle dogs were extracted on one mandible side. Twelve-weeks later, the same surgery was developed on the other side. Five implants with different platform surface configurations were randomly inserted into the post-extracted-sockets. On the healed side, the same five different implants were randomly placed. Implants were inserted 1 mm subcrestal to the buccal bony plate and were connected to abutments. The primary outcome variables were the supracrestal soft tissue (SST) adaptation and the bone resorption related to the implant shoulder. The SST height was significantly larger in immediate implants (IC95% 3.9–4.9 mm) compared to delayed implants (IC95% 3.1–3.5 mm). Marginal bone loss tended to be higher in immediate implants (IC95% 0.4–0.9 mm) than in delayed implants (IC95% 0.3–0.8 mm). Linear-regression analysis suggested that the SST height was significantly affected by the configuration of the platform (0.3–1.9 mm). Roughened surface platforms resulted in higher SST height when compared to machined surface platforms. Marginal bone loss was less pronounced in roughened designs.
Collapse
|
9
|
Vignoletti F, Sanz‐Esporrin J, Sanz‐Martin I, Nuñez J, Luengo F, Sanz M. Ridge alterations after implant placement in fresh extraction sockets or in healed crests: An experimental in vivo investigation. Clin Oral Implants Res 2019; 30:353-363. [DOI: 10.1111/clr.13421] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Revised: 01/25/2019] [Accepted: 02/20/2019] [Indexed: 01/19/2023]
Affiliation(s)
- Fabio Vignoletti
- Section of Periodontology, Faculty of Odontology University Complutense of Madrid Madrid Spain
| | - Javier Sanz‐Esporrin
- Section of Periodontology, Faculty of Odontology University Complutense of Madrid Madrid Spain
| | - Ignacio Sanz‐Martin
- Section of Periodontology, Faculty of Odontology University Complutense of Madrid Madrid Spain
| | - Javier Nuñez
- Section of Periodontology, Faculty of Odontology University Complutense of Madrid Madrid Spain
| | - Fernando Luengo
- Section of Periodontology, Faculty of Odontology University Complutense of Madrid Madrid Spain
| | - Mariano Sanz
- Section of Periodontology, Faculty of Odontology University Complutense of Madrid Madrid Spain
| |
Collapse
|
10
|
Tanaka K, Silva ER, Kawakami S, Canullo L, Botticelli D, Xavier SP. Effect of Plasma of Argon Treated Implants on Bone Density: A Randomized, Controlled, Histomorphometric Study in Dogs. Open Dent J 2018. [DOI: 10.2174/1874210601812010937] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Background:
Altering surface characteristics by increasing its energy and hydrophilicity will accelerate the interaction between cells and implant surface. Energy and hydrophilicity tend to disappear over a short time. The implant surface may be reactivated by the use of argon plasma
Objective:
To assess bone density at cleaned and activated titanium implants using argon plasma.
Methods:
Mandibular premolars and first molars were extracted bilaterally in eight Beagle dogs. After three months, four implants, two treated with argon plasma (test; plasma) and two left without treatment (control), were randomly installed in one side of the mandible. Abutments were applied on the implants and a non-submerged healing was allowed. After one month, the same surgical procedures were adopted on the opposite side of the mandible. The animals were euthanized after one month and ground sections representing the healing after 1 and 2 months were obtained for histological examination.
Results:
No statistically significant differences were found between test and control sites (p < 0.05). After 1 month of healing, new bone was 32.5 ± 12.2% and 33.8 ± 8.8% at the plasma and control sites, respectively. After 2 months, the respective values were 50.8 ± 21.5% and 47.6 ± 15.6%.
Conclusion:
The treatment of the implant surface with argon plasma did not have a significant effect on bone density around implants.
Collapse
|
11
|
Viganò P, Lang NP, Cesaretti G, Bengazi F, Omori Y, Botticelli D. Immediate loading at single crowns and 2-unit bridges supported by implants installed in a healed alveolar bony ridge or immediately after tooth extraction. An experimental study in dogs. J Oral Rehabil 2018; 45:974-982. [PMID: 30074633 DOI: 10.1111/joor.12702] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2018] [Revised: 07/28/2018] [Accepted: 07/31/2018] [Indexed: 11/28/2022]
Abstract
To evaluate presumptive differences in osseointegration at implants installed in healed sites or extraction sockets, supporting either crowns or bridges that were functionally loaded or left unloaded. In six dogs, the mesial roots of the first mandibular molars were treated endodontically. Bilaterally, the teeth were hemisected, and the distal roots extracted. First and second mandibular premolars were extracted as well. After 3 months, the mandibular third and fourth distal roots were extracted after endodontic treatment of the mesial roots. Four implants were installed bilaterally, two in the healed sites corresponding to the second premolar and first molar regions, and two into the extraction sockets. Cobalt-chrome single crowns were prepared and installed in the two most anterior implants, and bridges at the two most posterior implants, bilaterally. A 3-unit bridge was applied to the premolars in the upper jaw only at the loaded sites. All prostheses had a flat occlusal surface and contacts in centric occlusion only at the loaded sites. Three months later, biopsies were retrieved for histological analysis. Higher levels of osseointegration and bone density were observed at the unloaded sites, both at implants installed in healed and post-extraction sites. However, only at implants installed in the post-extraction sites and supporting single crowns, the difference in bone-to-Implant contact was statistically significant. In implant installation immediately following extraction or delayed after three months, osseointegration and bone density were not affected by occlusal contact schemes.
Collapse
Affiliation(s)
| | - Niklaus P Lang
- Center for Dental Medicine, University of Zurich, Zurich, Switzerland.,University of Bern, Bern, Switzerland
| | | | - Franco Bengazi
- ARDEC Academy, Rimini, Italy.,Faculty of Dentistry, University of Medical Science, La Habana, Cuba
| | - Yuki Omori
- ARDEC Academy, Rimini, Italy.,Department of Oral Implantology, Osaka Dental University, Osaka, Japan, ARDEC Academy Ariminum Odontologica, Rimini, Italy
| | - Daniele Botticelli
- ARDEC Academy, Rimini, Italy.,Faculty of Dentistry, University of Medical Science, La Habana, Cuba
| |
Collapse
|
12
|
He Y, Fischer D, Hasan I, Götz W, Keilig L, Ziegler L, Abboud M, Bourauel C, Wahl G. Sika deer antler as a novel model to investigate dental implant healing: A pilot experimental study. PLoS One 2018; 13:e0200957. [PMID: 30063761 PMCID: PMC6067741 DOI: 10.1371/journal.pone.0200957] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Accepted: 07/04/2018] [Indexed: 11/30/2022] Open
Abstract
Dental implants are important tools for restoring the loss of teeth. The rapid growth and periodic regeneration of antlers make Sika deer a good and less invasive alternative model for studying bone remodelling in mammals. We developed a special loading device for antlers and analysed the bone reaction around unloaded implants and under immediate loading conditions until osseointegration occurred. In micro-computed tomography images, the density of antler tissue around the implants increased as the loading time increased. This finding was histologically confirmed by the good osseointegration observed in unloaded and loaded specimens. Antler tissue displays a similar healing process to human bone. The use of an antler model is a promising alternative for implant studies that does not require animal sacrifice.
Collapse
Affiliation(s)
- Yun He
- Endowed Chair of Oral Technology, University of Bonn, Bonn, Germany
- Department of Oral Surgery, Hospital of Stomatology, Southwest Medical University, Luzhou, China
| | - Dominik Fischer
- Raptor Centre and Wildlife Park Hellenthal, Hellenthal, Germany
- Clinic for Birds, Reptiles, Amphibians and Fish, Veterinary Faculty, Justus Liebig University Giessen, Giessen, Germany
| | - Istabrak Hasan
- Endowed Chair of Oral Technology, University of Bonn, Bonn, Germany
- Department of Prosthetic Dentistry, Preclinical Education and Materials Science, University of Bonn, Bonn, Germany
- * E-mail:
| | - Werner Götz
- Department of Orthodontics, Oral Biology Laboratory, University of Bonn, Bonn, Germany
| | - Ludger Keilig
- Endowed Chair of Oral Technology, University of Bonn, Bonn, Germany
- Department of Prosthetic Dentistry, Preclinical Education and Materials Science, University of Bonn, Bonn, Germany
| | - Luisa Ziegler
- Clinic for Birds, Reptiles, Amphibians and Fish, Veterinary Faculty, Justus Liebig University Giessen, Giessen, Germany
| | - Markus Abboud
- Department of Prosthodontics and Digital Technology, School of Dental Medicine, Stony Brook University, Stony Brook, New York, United States of America
| | | | - Gerhard Wahl
- Department of Oral Surgery, University of Bonn, Bonn, Germany
| |
Collapse
|
13
|
He Y, Hasan I, Keilig L, Fischer D, Ziegler L, Abboud M, Wahl G, Bourauel C. Biomechanical characteristics of immediately loaded and osseointegration dental implants inserted into Sika deer antler. Med Eng Phys 2018; 59:8-14. [PMID: 30017665 DOI: 10.1016/j.medengphy.2018.04.021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2017] [Revised: 03/13/2018] [Accepted: 04/16/2018] [Indexed: 10/28/2022]
Abstract
This study aimed to compare biomechanical characteristics of immediately loaded (IL) and osseointegrated (OS) dental implants inserted into Sika deer antler and lay a foundation for developing an alternative animal model for dental implants studies. Two implants per antler were inserted. One implant was loaded immediately via a self-developed loading device; the other was submerged and unloaded as control. IL implants were harvested after different loading periods. The unloaded implants were collected after OS and the shedding of antler. Specimens were scanned by µCT scanner and finite element models were generated. A vertical force of 10 N was applied on the implant. The mean values of maximum displacements, stresses and strains were compared. The results showed that the density of antler tissue around the implants dramatically increased as the loading time increased. After shedding the antler, 3 pairs of antlers were collected and the density of antler tissue remained in a similar value in all specimens. The maximum values of displacement and stresses in implant and stresses and strains in antler tissue were significantly different among OS models. In one antler, all the biomechanical parameters of IL model were significantly higher than those of OS model of the same animal (P < 0.05) and wider distributions were obtained from IL model. It can be concluded that implants inserted into Sika deer antler might not disturb the growth and calcification process of antler and the use of Sika deer antler model is a promising alternative for implant studies that does not require animal sacrifice.
Collapse
Affiliation(s)
- Yun He
- Orofacial Reconstruction and Regeneration Laboratory, Department of Oral and Maxillofacial Surgery, the Hospital of Stomatology, Southwest Medical University, Luzhou, China; Oral Technology, Dental School, University of Bonn, Welschnonnenstr. 17, 53111 Bonn, Germany
| | - Istabrak Hasan
- Oral Technology, Dental School, University of Bonn, Welschnonnenstr. 17, 53111 Bonn, Germany; Department of Prosthetic Dentistry, Preclinical Education and Materials Science, Dental School, University of Bonn, Bonn, Germany.
| | - Ludger Keilig
- Oral Technology, Dental School, University of Bonn, Welschnonnenstr. 17, 53111 Bonn, Germany; Department of Prosthetic Dentistry, Preclinical Education and Materials Science, Dental School, University of Bonn, Bonn, Germany
| | - Dominik Fischer
- Raptor Center and Wildlife Parc Hellenthal, Hellenthal, Germany; Clinic for Birds, Reptiles, Amphibians and Fish, Veterinary Faculty, Justus Liebig University Giessen, Giessen, Germany
| | - Luisa Ziegler
- Clinic for Birds, Reptiles, Amphibians and Fish, Veterinary Faculty, Justus Liebig University Giessen, Giessen, Germany
| | - Markus Abboud
- Department of Prosthodontics and Digital Technology, School of Dental Medicine, Stony Brook University, 1104 Westchester Hall, Stony Brook, New York
| | - Gerhard Wahl
- Department of Oral Surgery, Dental School, University of Bonn, Bonn, Germany
| | - Christoph Bourauel
- Oral Technology, Dental School, University of Bonn, Welschnonnenstr. 17, 53111 Bonn, Germany
| |
Collapse
|
14
|
Immediate Early and Delayed Implants: A 2-Year Prospective Cohort Study of 131 Transmucosal Flapless Implants Placed in Sites With Different Pre-extractive Endodontic Infections. IMPLANT DENT 2018; 26:654-663. [PMID: 28945667 DOI: 10.1097/id.0000000000000666] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
INTRODUCTION To evaluate clinical outcome of early, immediate, and delayed transmucosal implants placed in patients affected by acute/chronic endodontic lesions. MATERIALS AND METHODS Eighty-five consecutive patients received 131 titanium implants with zirconium-oxide blasted surface. Pre-extractive diagnosis represented the main criteria for implant placement timing, following "best treatment" criteria. Implants were placed with flapless transmucosal technique. Hopeless teeth with chronic periapical lesions received atraumatic extraction, and an implant was immediately placed (Immediate Group, n = 29). Teeth with acute periapical lesion/abscess were extracted and implants placed after 8 to 12 weeks (Early Group, n = 29). Implants placed 10- to 12-month after extraction constituted the control group (delayed group, n = 73). Implants were loaded 3 months after insertion with provisional resin crowns and after approximately 15 days with definitive ceramic crowns. Marginal bone loss (MBL) was measured in a single-blind manner on periapical radiographs at 1, 3, 6, 12, and 24 months. RESULTS Multilevel analysis described exploring factors associated with MBL. Survival rate was 100%. MBL after 24 months was 0.78 ± 0.70 (95% confidence interval [CI]: 0.20 to -1.37) at immediate, 0.48 ± 0.70 at early (95% CI: -0.006 to -0.961), and 1.02 ± 1.01 (95% CI: 0.61 to -1.43) at delayed groups. Implant groups (immediate/early/delayed) and location (maxillary/mandibular) showed statistically significant results. Early group showed the lowest MBL values. The immediate group demonstrated less MBL than the delayed group. CONCLUSION Early implant placement technique preserves periimplant marginal bone level more than immediate and delayed techniques.
Collapse
|
15
|
|
16
|
Cesaretti G, Lang NP, Viganò P, Bengazi F, Apaza Alccayhuaman KA, Botticelli D. Immediate and delayed loading of fixed dental prostheses supported by single or two splinted implants: A histomorphometric study in dogs. J Oral Rehabil 2018; 45:308-316. [PMID: 29385632 DOI: 10.1111/joor.12612] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/24/2018] [Indexed: 11/29/2022]
Abstract
To evaluate presumptive differences in osseointegration at implants supporting crowns that are physiologically loaded either immediately or 3 months after installation. All premolars and first molars were extracted bilaterally in six dogs. After 3 months of healing, three implants were installed on the premolar region and two in the molar region in one side of the mandible. Likewise, after another 3 months, five implants were installed in the contralateral side, and impressions were taken bilaterally. Within 48 hours, two single crowns were screwed bilaterally onto two implants in the premolar region, and two splinted crowns reproducing the shape of the first molar were screwed bilaterally onto the implants in the molar region. The mesial implants were used as no-loaded controls. Sacrifices were performed after 3 months, and histological analyses were performed. At the premolar sites, mineralised bone-to-implant contact (MBIC%) was 78.0 ± 4.0% and 70.9 ± 7.9% at the delayed and immediately loaded sites, respectively. This difference was statistically significant. At the control implants, MBIC% was 61.4 ± 14.7% and 63.1 ± 13.1% at the delayed and the immediately loaded sites, respectively. At the molar sites, MBIC% was 79.2 ± 10.9% and 61.1 ± 10.3% at the delayed and immediately loaded sites, respectively. Applying a delayed loading to fixed dental prostheses supported by single or two splinted implants yielded higher proportions of bone-to-implant contact (osseointegration) compared to immediately loaded implants. Moreover, both types of loading protocols yielded a higher rate of osseointegration compared to unloaded implant sites after 3 months following implant installation.
Collapse
Affiliation(s)
| | - N P Lang
- Center for Dental Medicine, University of Zurich, Zurich, Switzerland.,University of Bern, Bern, Switzerland
| | | | - F Bengazi
- ARDEC Academy, Rimini, Italy.,Faculty of Dentistry, University of Medical Science, La Habana, Cuba
| | | | - D Botticelli
- ARDEC Academy, Rimini, Italy.,Faculty of Dentistry, University of Medical Science, La Habana, Cuba
| |
Collapse
|
17
|
Sanz-Martin I, Vignoletti F, Nuñez J, Permuy M, Muñoz F, Sanz-Esporrín J, Fierravanti L, Shapira L, Sanz M. Hard and soft tissue integration of immediate and delayed implants with a modified coronal macrodesign: Histological, micro-CT and volumetric soft tissue changes from a pre-clinical in vivo study. J Clin Periodontol 2017; 44:842-853. [DOI: 10.1111/jcpe.12747] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/20/2017] [Indexed: 11/28/2022]
Affiliation(s)
- Ignacio Sanz-Martin
- Section of Periodontology; Faculty of Odontology; University Complutense of Madrid; Madrid Spain
| | - Fabio Vignoletti
- Section of Periodontology; Faculty of Odontology; University Complutense of Madrid; Madrid Spain
| | - Javier Nuñez
- Section of Periodontology; Faculty of Odontology; University Complutense of Madrid; Madrid Spain
| | - Maria Permuy
- Faculty of Veterinary Lugo; University of Santiago de Compostela; Lugo Spain
| | - Fernando Muñoz
- Faculty of Veterinary Lugo; University of Santiago de Compostela; Lugo Spain
| | - Javier Sanz-Esporrín
- Section of Periodontology; Faculty of Odontology; University Complutense of Madrid; Madrid Spain
| | - Ludovica Fierravanti
- Section of Periodontology; Faculty of Odontology; University Complutense of Madrid; Madrid Spain
| | - Lior Shapira
- Department of Periodontology; Hebrew University - Hadassah Faculty of Dental Medicine; Jerusalem Israel
| | - Mariano Sanz
- Section of Periodontology; Faculty of Odontology; University Complutense of Madrid; Madrid Spain
| |
Collapse
|
18
|
Immediate Loading of Tapered Implants Placed in Postextraction Sockets and Healed Sites. J Craniofac Surg 2017; 27:1220-7. [PMID: 27391493 DOI: 10.1097/scs.0000000000002756] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
OBJECTIVE The aim of the present study was to compare the survival, stability, and complications of immediately loaded implants placed in postextraction sockets and healed sites. METHODS Over a 2-year period, all patients presenting with partial or complete edentulism of the maxilla and/or mandible (healed site group, at least 4 months of healing after tooth extraction) or in need of replacement of nonrecoverable failing teeth (postextraction group) were considered for inclusion in this study. Tapered implants featuring a nanostructured calcium-incorporated surface were placed and loaded immediately. The prosthetic restorations comprised single crowns, fixed partial dentures, and fixed full arches. Primary outcomes were implant survival, stability, and complications. Implant stability was assessed at placement and at each follow-up evaluation (1 week, 3 months, and 1 year after placement): implants with an insertion torque (IT) <45 N·cm and/or with an implant stability quotient (ISQ) <70 were considered failed for immediate loading. A statistical analysis was performed. RESULTS Thirty implants were placed in postextraction sockets of 17 patients, and 32 implants were placed in healed sites of 22 patients. There were no statistically significant differences in ISQ values between the 2 groups, at each assessment. In total, 60 implants (96.8%) had an IT ≥45 and an ISQ ≥70 at placement and at each follow-up control: all these implants were successfully loaded. Only 2 implants (1 in a postextraction socket and 1 in a healed site, 3.2%) could not achieve an IT ≥45 N·cm and/or an ISQ ≥70 at placement or over time: accordingly, these were considered failed for stability, as they could not be subjected to immediate loading. One of these 2 implants, in a healed site of a posterior maxilla, had to be removed, yielding an overall 1-year implant survival rate of 98.4%. No complications were reported. No significant differences were reported between the 2 groups with respect to implant failures and complications. CONCLUSION Immediately loaded implants placed in postextraction sockets and healed sites had similar high survival and stability, with no reported complications. Further long-term studies on larger samples of patients are needed to confirm these results.
Collapse
|
19
|
Blaskovic M, Gabrić D, Coleman NJ, Slipper IJ, Mladenov M, Gjorgievska E. Bone Healing Following Different Types of Osteotomy: Scanning Electron Microscopy (SEM) and Three-Dimensional SEM Analyses. MICROSCOPY AND MICROANALYSIS : THE OFFICIAL JOURNAL OF MICROSCOPY SOCIETY OF AMERICA, MICROBEAM ANALYSIS SOCIETY, MICROSCOPICAL SOCIETY OF CANADA 2016; 22:1170-1178. [PMID: 27998364 DOI: 10.1017/s1431927616011971] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The aim of the present study was to compare dynamics of the bone healing process after different types of osteotomies. In total, 24 Wistar rats were subjected to different types of osteotomy performed with standard steel bur, piezosurgery, contact, and non-contact Erbium:yttrium-aluminum-garnet (Er:YAG) laser ablation. The animals were randomly divided into four groups, to be euthanized immediately after the procedure, or at 1, 2, or 3 weeks after surgery. The obtained bone samples were analyzed by scanning electron microscopy (SEM). Immediately after surgery, there were significant differences in the appearance of the bone defects, with presence of bone fragments and debris after standard steel bur preparation, compared with the clean smooth walls and relatively sharp edges in all other groups. The initial bone formation in defects prepared by piezosurgery was observed to be the most rapid. After 3 weeks, all bone defects were completely restored; although, differences in the healing pattern were noted, with a modest initial delay in healing after laser preparation. The first stage of the bone healing process was delayed when contact and non-contact Er:YAG laser modes were used and accelerated by piezosurgery; however, the results after 3 weeks demonstrated similar restitution of defects in all tested groups.
Collapse
Affiliation(s)
- Marko Blaskovic
- 1Department of Oral Surgery,School of Dental Medicine, Faculty of Dentistry,University of Zagreb,Republic of Croatia, Ivana Gundulića 5, 10000, Zagreb,Croatia
| | - Dragana Gabrić
- 1Department of Oral Surgery,School of Dental Medicine, Faculty of Dentistry,University of Zagreb,Republic of Croatia, Ivana Gundulića 5, 10000, Zagreb,Croatia
| | - Nichola J Coleman
- 2Faculty of Engineering and Science,University of Greenwich,Maritime, Gillingham, Chatham ME4 4TB, Central Ave, Gillingham, Chatham ME4,UK
| | - Ian J Slipper
- 2Faculty of Engineering and Science,University of Greenwich,Maritime, Gillingham, Chatham ME4 4TB, Central Ave, Gillingham, Chatham ME4,UK
| | - Mitko Mladenov
- 3Faculty of Natural Sciences and Mathematics,University "Ss Cyril and Methodius" Skopje,Arhimedova, 1000 Skopje,Republic of Macedonia
| | - Elizabeta Gjorgievska
- 4Faculty of Dentistry,University "Ss Cyril and Methodius" Skopje,Vodnjanska 17, 1000 Skopje,Republic of Macedonia
| |
Collapse
|
20
|
Mihatovic I, Golubovic V, Becker J, Schwarz F. Bone tissue response to experimental zirconia implants. Clin Oral Investig 2016; 21:523-532. [PMID: 27501958 DOI: 10.1007/s00784-016-1904-2] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2014] [Accepted: 07/06/2016] [Indexed: 11/25/2022]
Abstract
OBJECTIVES This study seeks to assess the bone tissue response at experimental zirconia implants in comparison with titanium implants by means of descriptive histology and histomorphometry in a dog model. MATERIALS AND METHODS Experimental zirconia implants with three different surface roughnesses (Z1 < Z2 < Z3) and conventional sandblasted large grit and acid-etched titanium implants were inserted bilaterally in the lower jaws of nine beagle dogs. Tissue biopsies were obtained after 3 and 14 days and 10 weeks of transmucosal healing. The tissue response was investigated by assessing new, old, and total bone-to-implant contact (nBIC, oBIC, and tBIC). RESULTS After 3 days, histological specimens of all groups showed an intimate contact between the implant threads and pristine bone (tBIC: Ti 42.3 % > Z2 30.1 % > Z3 28.9 % > Z1 25.1 %, p > 0.05, unpaired t test, respectively). A provisional matrix was evident at all implant surfaces. At 14 days, percentages of BIC increased in all groups (tBIC: Ti 62.1 % > Z3 69.2 % < Z2 44.4 % > Z1 42.3 %; nBIC: Z3 58.9 % > Ti 52.2 % > Z2 35.1 % > Z1 32.5 %). Two implants, one of group Z1 and one of group Z2, were lost. At 10 weeks, 13 of 18 zirconia implants were lost, equally distributed between all three surface modifications. The remaining implants revealed increased BIC values (tBIC: Z3 69.5 % > Ti 58.5 % > Z1 49.7 % > Z2 37.1 %; nBIC: Z3 57.2 % > Ti 46.5 % > Z1 32.3 % > Z2 29.3 %). Histomorphometrical analysis showed comparable mean BIC values in all groups at all healing periods without showing statistical differences (p > 0.05, unpaired t test, respectively). CONCLUSION The bone tissue response throughout the healing periods was characterized by a constant bone remodeling accompanied by resorption of old bone in favor of new bone formation at both titanium and zirconia implants. Surface roughness had a positive effect on BIC, although not showing statistical significance. Due to the poor survival rate, the experimental zirconia implants investigated may not be suitable for clinical use. CLINICAL RELEVANCE Zirconia has been introduced as an alternative biomaterial for dental implants. A profound knowledge about the bone tissue response at zirconia implant surfaces is necessary as it plays an important role for proper osseointegration and long-term stability.
Collapse
Affiliation(s)
- Ilja Mihatovic
- Department of Oral Surgery, Heinrich Heine University, Düsseldorf, Germany.
- Department of Oral Surgery, Westdeutsche Kieferklinik, Heinrich Heine University, 40225, Düsseldorf, Germany.
| | - Vladimir Golubovic
- Department of Oral Surgery, Heinrich Heine University, Düsseldorf, Germany
| | - Jürgen Becker
- Department of Oral Surgery, Heinrich Heine University, Düsseldorf, Germany
| | - Frank Schwarz
- Department of Oral Surgery, Heinrich Heine University, Düsseldorf, Germany
| |
Collapse
|
21
|
Caroprese M, Lang NP, Rossi F, Ricci S, Favero R, Botticelli D. Morphometric evaluation of the early stages of healing at cortical and marrow compartments at titanium implants: an experimental study in the dog. Clin Oral Implants Res 2016; 28:1030-1037. [DOI: 10.1111/clr.12913] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/24/2016] [Indexed: 01/29/2023]
Affiliation(s)
- Marino Caroprese
- Faculty of Dentistry; University of Medical Science; La Habana Cuba
| | - Niklaus P. Lang
- Center for Dental Medicine; University of Zurich; Zurich Switzerland
- University of Bern; Bern Switzerland
| | - Fabio Rossi
- Department of Biomedical and Neuromotorial Science; University of Bologna; Bologna Italy
- ARDEC Academy; Ariminum Odontologica; Rimini Italy
| | - Sara Ricci
- Department of Oral Surgery, Dental School; University of Padova; Padova Italy
| | | | - Daniele Botticelli
- ARDEC Academy; Ariminum Odontologica; Rimini Italy
- POI - Programa Odontológico Internacional; Cartagena de Indias Colombia
| |
Collapse
|
22
|
Favero V, Lang NP, Favero R, Carneiro Martins Neto E, Salata LA, Botticelli D. Sequential morphometric evaluation at UnicCa ® and SLActive ® implant surfaces. An experimental study in the dog. Clin Oral Implants Res 2016; 28:1023-1029. [PMID: 27302198 DOI: 10.1111/clr.12906] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/21/2016] [Indexed: 11/29/2022]
Abstract
AIM To study sequential osseointegration around implants with nano-technologically modified surfaces at different periods of healing. MATERIALS AND METHODS After 3 months, two different implant systems with different nano-technologically modified surfaces were randomly installed in the edentulous molar regions of the mandible of 12 dogs. One surface was acid-etched surface, and subsequently modified with calcium ions (UnicCa® ), while the other was a hydrophilic sandblasted with large grit and acid-etched (SLActive® ) surface. The implants were fully submerged, and biopsies were obtained representing the healing after 1, 2, 4 and 8 weeks (n = 6 per period). A morphometric evaluation of densities of new soft tissues (provisional matrix and immature bone marrow), new and old bone, mature bone marrow, vessels and other tissues (bone debris/particles and clot) was performed in the spongiosa compartment of the sites of implantation. RESULTS After 1 week of healing, the soft tissues, mainly composed of provisional matrix, were present at 41.5 ± 23.9% and 30.1 ± 20.0% at the UnicCa® and SLActive surfaces, respectively. These percentages were >40% at both surfaces after 2 weeks of healing, presenting greater amount of immature bone marrow. Subsequently, these percentages decreased up to disappear after 8 weeks of healing. New bone increased progressively between 1 and 8 weeks of healing from 8.2 ± 3.0% to 77.1 ± 6.4% and from 6.8 ± 2.8% to 67.9 ± 6.8% at the UnicCa® and SLActive® , respectively. Old bone decreased progressively over time. CONCLUSIONS The patterns of healing at highly hydrophilic surfaces occurred through the early formation of a provisional matrix followed by the formation of new bone and marrow at various stages of maturation. The healing was similar to those described in different animal models, anatomical sites and surgical procedures.
Collapse
Affiliation(s)
- Vittorio Favero
- Section of Oral & Maxillofacial Surgery, Department of Surgery, University of Verona, Verona, Italy
| | - Niklaus P Lang
- Center for Dental Medicine, University of Zurich, Zurich, Switzerland.,University of Bern, Bern, Switzerland
| | | | | | - Luiz A Salata
- Faculty of Dentistry, São Paulo University USP, Ribeirão Preto, SP, Brazil
| | - Daniele Botticelli
- ARDEC Academy, Ariminum Odontologica, Rimini, Italy.,POI - Programa Odontológico Internacional, Cartagena de Indias, Colombia
| |
Collapse
|
23
|
Favero V, Lang NP, Favero R, Antunes AA, Salata LA, Botticelli D. Sequential morphometric evaluation at UnicCa
®
and
DCD
®
implant surfaces. An experimental study in the dog. Clin Oral Implants Res 2016; 28:833-839. [DOI: 10.1111/clr.12888] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/07/2016] [Indexed: 11/30/2022]
Affiliation(s)
- Vittorio Favero
- Section of Oral & Maxillofacial Surgery Department of Surgery University of Verona Verona Italy
| | - Niklaus P. Lang
- Center for Dental Medicine University of Zurich Zurich Switzerland
- University of Bern Bern Switzerland
| | | | - Antonio A. Antunes
- Faculty of Dentistry of Ribeirão Preto São Paulo University (USP) Ribeirão Preto Brazil
| | - Luiz A. Salata
- Faculty of Dentistry of Ribeirão Preto São Paulo University (USP) Ribeirão Preto Brazil
| | - Daniele Botticelli
- ARDEC Academy Ariminum Odontologica Rimini Italy
- POI ‐ Programa Odontológico Internacional Cartagena de Indias Colombia
| |
Collapse
|
24
|
Botticelli D, Lang NP. Dynamics of osseointegration in various human and animal models ‐ a comparative analysis. Clin Oral Implants Res 2016; 28:742-748. [DOI: 10.1111/clr.12872] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/27/2016] [Indexed: 12/29/2022]
Affiliation(s)
- Daniele Botticelli
- ARDEC Academy Ariminum Odontologica Rimini Italy
- POI ‐ Programa Odontológico Internacional Cartagena de Indias Colombia
| | - Niklaus P. Lang
- Center for Dental Medicine University of Zurich Zurich Switzerland
- University of Bern Bern Switzerland
| |
Collapse
|
25
|
de Jesus RNR, Stavropoulos A, Oliveira MTF, Soares PBF, Moura CCG, Zanetta-Barbosa D. Histomorphometric evaluation of a dual acid-etched vs. a chemically modified hydrophilic dual acid-etched implant surface. An experimental study in dogs. Clin Oral Implants Res 2016; 28:551-557. [PMID: 27006317 DOI: 10.1111/clr.12833] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/22/2016] [Indexed: 01/06/2023]
Abstract
OBJECTIVE The aim of this preclinical in vivo study was to compare histologically and histomorphometrically osseointegration of dual acid-etched vs. hydrophilic implants. MATERIAL AND METHODS Two pairs of implants (Neodent, Curitiba, Brazil), with same macrogeometry but different surface technology (i) dual acid-etched surface (SAE) treatment with hydrochloric and sulfuric acid followed by microwave treatment and insertion in isotonic saline solution to increase hydrophilicity (SAE-HD) (test, n = 12); (ii) dual SAE (control, n = 12) were installed bilaterally in the proximal tibia of six beagle dogs. Histologic and histomorphometric evaluation was performed after 2 and 4 weeks in vivo, on non-decalcified sections. Percentages of bone-to-implant contact (BIC) and bone density (BD) were estimated and tested for significant differences with the Wilcoxon signed-rank test for paired samples (P < 0.05). RESULTS In general, new bone formation along and in contact with the implant surface could be observed irrespective of the experimental group and observation period. Most of the bone was woven but small quantities of lamellar bone, mainly in close proximity to the cortex could also be observed. BIC at 2 weeks was 19.57 ± 13.57 and 20.33 ± 7.99 (P = 0.75), and at 4 weeks was 42.80 ± 14.48 and 40.25 ± 9.45 (P = 0.65) for SAE-HD and SAE implants respectively. BD at 2 weeks was 24.85 ± 16.31 and 25.66 ± 8.59 (P = 0.35) and at 4 weeks 44.13 ± 6.46 and 40.13 ± 6.46 (P = 0.25) for SAE-HD and SAE implants respectively. CONCLUSION Bone-to-implant contact and BD increased with time in both SAE-HD and SAE implants. No significant differences were observed between the two different implant surfaces for any of the evaluated parameters and at any observation time-point.
Collapse
Affiliation(s)
| | - Andreas Stavropoulos
- Department of Periodontology, Faculty of Odontology, Malmö University, Malmö, Sweden
| | - Maiolino Thomaz Fonseca Oliveira
- Department of Oral and Maxillofacial Surgery and Implantology, School of Dentistry, Universidade Federal de Uberlândia, Uberlândia, MG, Brazil
| | - Priscilla Barbosa Ferreira Soares
- Department of Oral and Maxillofacial Surgery and Implantology, School of Dentistry, Universidade Federal de Uberlândia, Uberlândia, MG, Brazil
| | | | - Darceny Zanetta-Barbosa
- Department of Oral and Maxillofacial Surgery and Implantology, School of Dentistry, Universidade Federal de Uberlândia, Uberlândia, MG, Brazil
| |
Collapse
|
26
|
Schweikert MT, Botticelli D, Sbricoli L, Antunes A, Favero V, Salata LA. Sequential Healing at Implants with Different Configuration and Modified Surfaces: An Experimental Study in the Dog. Clin Implant Dent Relat Res 2015; 18:439-48. [DOI: 10.1111/cid.12330] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
| | - Daniele Botticelli
- Faculty of Dentistry; University of Medical Science; La Habana Cuba
- UNESP - Faculty of Dentistry of Araçatuba; São Paulo State University; São Paulo Brazil
- ARDEC; Ariminum Odontologica; Rimini Italy
| | - Luca Sbricoli
- School of Dentistry; University of Padua; Padova Italy
| | - Antonio Antunes
- Faculty of Dentistry of Ribeirão Preto; São Paulo University (USP); São Paulo Brazil
| | | | - Luiz A. Salata
- Faculty of Dentistry of Ribeirão Preto; São Paulo University (USP); São Paulo Brazil
| |
Collapse
|
27
|
Favero R, Lang NP, Salata LA, Neto ECM, Caroprese M, Botticelli D. Sequential healing events of osseointegration at UnicCa®and SLActive®implant surfaces: an experimental study in the dog. Clin Oral Implants Res 2015; 27:203-10. [DOI: 10.1111/clr.12591] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/04/2015] [Indexed: 12/14/2022]
Affiliation(s)
| | - Niklaus P. Lang
- Center for Dental Medicine; University of Zurich; Zurich Switzerland
- University of Bern; Bern Switzerland
| | - Luiz A. Salata
- Faculty of Dentistry of Ribeirão Preto (SP); São Paulo University USP; Ribeirão (SP) Brazil
| | | | - Marino Caroprese
- Faculty of Dentistry; University of Medical Science; La Habana Cuba
| | - Daniele Botticelli
- Faculty of Dentistry; University of Medical Science; La Habana Cuba
- ARDEC; Ariminum Odontologica; Rimini Italy
| |
Collapse
|
28
|
Favero R, Botticelli D, Antunes AA, Martinez Sanchez R, Caroprese M, Salata LA. Sequential Healing at Calcium- versus Calcium Phosphate-Modified Titanium Implant Surfaces: An Experimental Study in Dogs. Clin Implant Dent Relat Res 2015; 18:369-78. [PMID: 25727337 DOI: 10.1111/cid.12311] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
PURPOSE The aim of this paper was to study the sequential healing of bone tissues at implants with different configuration and different modified surfaces. MATERIALS AND METHODS Twelve Beagle dogs were used. Extractions of all teeth from the second premolar to the first molar were performed in both sides of the mandible. After 3 months, full-thickness flaps were elevated and two implants of different systems and with different surfaces were randomly installed in the premolar region in one side of the mandible. One surface was acid etched and further modified with calcium ions (BTI unicCa®), the other was sandblasted and acid etched plus a nanometer calcium phosphate deposition (3i T3®). The flaps were sutured to allow a fully submerged healing. The surgery on the other side of the mandible and the sacrifices were planned in such a way to obtain biopsies representing the healing after 1, 2, 4, and 8 weeks (n = 6 per period). RESULTS After 1 and 2 weeks of healing, the mean values of new bone apposition on the implant surfaces were 5.9 ± 3.3% and 29.8 ± 16.0% at BTI unicCa and 4.6 ± 3.3% and 12.4 ± 5.6% at 3i T3, respectively. After 4 and 8 weeks, the percentage increased, being 49.4 ± 8.1% and 63.6 ± 7.3% at BTI unicCa and 40.3 ± 10.0% and 47.3 ± 20.2 at 3i T3, respectively. Differences statistically significant between the two surfaces were found only at the 2- and 4-week observation periods. Concomitantly, the old bone was resorbed at both surfaces from about 15-17% after 1 week to about 4-6% after 8 weeks of healing. CONCLUSION Moderately rough surfaces modified with calcium ions or discrete calcium phosphate nanocrystalline deposition showed similar patterns of sequential healing. Higher new bone percentages were found at BTI unicCa compared with the 3i T3 implants, the difference being statistically significant at 2 and 4 weeks observation.
Collapse
Affiliation(s)
| | - Daniele Botticelli
- ARDEC, Ariminum Odontologica, Rimini, Italy.,POI, Programa Odontológico Internacional, Cartagena de Indias, Colombia
| | - Antonio A Antunes
- Faculty of Dentistry, São Paulo University, USP, Ribeirão Preto, Brazil
| | | | - Marino Caroprese
- Faculty of Dentistry, University of Medical Science, La Habana, Cuba
| | - Luiz A Salata
- Faculty of Dentistry, São Paulo University, USP, Ribeirão Preto, Brazil
| |
Collapse
|
29
|
Mainetti T, Lang NP, Bengazi F, Favero V, Soto Cantero L, Botticelli D. Sequential healing at implants installed immediately into extraction sockets. An experimental study in dogs. Clin Oral Implants Res 2014; 27:130-8. [DOI: 10.1111/clr.12533] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/21/2014] [Indexed: 02/03/2023]
Affiliation(s)
- Tomaso Mainetti
- Faculty of Dentistry; University of Medical Science; La Habana Cuba
| | - Niklaus P. Lang
- Center for Dental Medicine; University of Zurich; Zurich Switzerland
- University of Bern; Bern Switzerland
| | - Franco Bengazi
- Faculty of Dentistry; University of Medical Science; La Habana Cuba
| | - Vittorio Favero
- Faculty of Dentistry; University of Medical Science; La Habana Cuba
| | | | - Daniele Botticelli
- Faculty of Dentistry; University of Medical Science; La Habana Cuba
- ARDEC; Ariminum Odontologica; Rimini Italy
- UNESP - Faculdade de Odontologia de Araçatuba; UNESP - Universidade Estadual Paulista; São Paulo Brasil
| |
Collapse
|