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Kadkhodazadeh M, Amid R, Moscowchi A, Lakmazaheri E. Short-term and long-term success and survival rates of implants supporting single-unit and multiunit fixed prostheses: A systematic review and meta-analysis. J Prosthet Dent 2023:S0022-3913(23)00008-2. [PMID: 36781339 DOI: 10.1016/j.prosdent.2022.12.012] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Revised: 12/29/2022] [Accepted: 12/29/2022] [Indexed: 02/13/2023]
Abstract
STATEMENT OF PROBLEM Whether placing implants to replace each missing tooth or using implant-supported fixed partial dentures provides better outcomes is unclear. PURPOSE The purpose of this systematic review and meta-analysis was to assess the success and survival rates of implants supporting single-unit and multiunit fixed prostheses by using conventional protocols for placement and loading in short- and long-term follow-ups. MATERIAL AND METHODS An electronic search was conducted in PubMed, Scopus, and Web of Science for studies published up to March 17, 2022. Comparative studies that reported the success or survival rates of both single-unit and splinted multiunit prostheses were considered for qualitative and quantitative analyses. RESULTS A total of 68 publications comprising 11 271 implants were included. Compared with the single prostheses, the splinted multiunit group showed no significant differences in implant success rates in the short-term (risk difference=-0.004; 95% confidence interval (CI)=-0.033 to 0.025; P=.780) and long-term (risk difference=0.003; 95% confidence interval (CI)=-0.029 to 0.034; P=.874) follow-ups. Significant statistical differences were also not found in terms of the survival rates of the 2 groups (short-term risk difference=-0.004; 95% CI=-0.031 to 0.023; P=.779, long-term risk difference=-0.002; 95% CI=-0.029 to 0.025; P=.887). CONCLUSIONS Implants supporting single-unit or splinted multiunit prostheses seem to be a predictable treatment in terms of survival and success over short and long periods. Nonetheless, it seems that cantilever and nonsplinted multiunit prostheses should be used with more caution.
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Affiliation(s)
- Mahdi Kadkhodazadeh
- Professor, Research Institute for Dental Sciences, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran; Professor, Department of Periodontics, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Reza Amid
- Associate Professor, Research Institute for Dental Sciences, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran; Associate Professor, Department of Periodontics, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Anahita Moscowchi
- Assistant Professor, Department of Periodontics, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Ehsan Lakmazaheri
- Undergraduate student, Department of Periodontics, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
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Kashiwada H, Shimizu Y, Sano Y, Yamauchi K, Guang H, Kumamoto H, Unuma H, Zhu YJ. In vivo behaviors of highly flexible paper consisting of ultralong hydroxyapatite nanowires. J Biomed Mater Res B Appl Biomater 2021; 109:1611-1621. [PMID: 33665970 DOI: 10.1002/jbm.b.34819] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2020] [Revised: 01/17/2021] [Accepted: 01/20/2021] [Indexed: 11/05/2022]
Abstract
This study was conducted in order to investigate biological compatibility of a thin and flexible hydroxyapatite (HAP) paper which consists of ultralong hydroxyapatite nanowires. Circular-shaped cranial bone defects with a diameter of 8.8 mm were prepared to expose the dura maters in Wistar rats. The similar-sized, circular-shaped HAP paper was placed at the bottom of the bone defects. After 2, 4, and 8 weeks, the rats were sacrificed, and the experimental sections were examined by micro-CT scanning and histological observation. The HAP paper covered with fibrous tissues showed no inflammatory cell infiltration, and their thicknesses decreased over time. Tartrate-resistant acid phosphatase-positive osteoclast-like cells were induced around the edges of the HAP paper along with the exfoliation of the HAP paper. The newly-formed bones were observed in the bone-defected areas, either with a direct contact with the HAP paper or through thin fibrous tissues. The HAP paper-induced osteoblast differentiation was confirmed since the alkaline phosphatase activities were detected on the surfaces of the HAP paper. These results indicated that the HAP paper may induce osteogenesis without causing any harmful effects. The highly flexible HAP paper can contribute to further development of bone regenerative therapy.
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Affiliation(s)
| | - Yoshinaka Shimizu
- Division of Oral Pathology, Graduate School of Dentistry, Sendai, Japan
| | - Yuya Sano
- Division of Oral Pathology, Graduate School of Dentistry, Sendai, Japan
| | | | - Hong Guang
- Division of International Collaborative and Innovative Dentistry, Tohoku University, Sendai, Miyagi, Japan
| | | | - Hidero Unuma
- Department of Chemistry and Chemical Engineering, Graduate School of Science and Engineering, Yamagata University, Yamagata, Japan
| | - Ying-Jie Zhu
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, China
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Knobloch LA, Larsen P, McGlumphy E, Kim DG, Gohel A, Messner R, Fogarty KJ, Fogarty MT. Prospective cohort study to evaluate narrow diameter implants for restoration of a missing lateral incisor in patients with a cleft palate: One-year results. J Prosthet Dent 2021; 128:1265-1274. [PMID: 34034898 DOI: 10.1016/j.prosdent.2021.03.030] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Revised: 03/22/2021] [Accepted: 03/23/2021] [Indexed: 11/17/2022]
Abstract
STATEMENT OF PROBLEM Patients diagnosed with a cleft palate often have a congenitally missing maxillary lateral incisor. The congenital cleft presents the practitioner with challenges including the quantity and quality of bone, a surgically managed cleft correction, and limited clinical space. PURPOSE The purpose of the present prospective investigation was to report preliminary results at the 1-year follow-up for this planned 5-year investigation of narrow diameter implants used to restore a missing lateral incisor in patients with a cleft palate. MATERIAL AND METHODS Fourteen study participants with a cleft palate and a missing maxillary lateral incisor were enrolled based on established criteria. Narrow diameter implants (AstraTech OsseoSpeed TX 3.0S and 3.5 mm) were placed by using a 2-stage protocol and restored. All study participants received an Atlantis abutment and a cement-retained crown. Four probing depth measurements and bleeding on probing were measured at baseline and at 1 year. Probing depth measurements were evaluated using a 2-way repeated measures ANOVA with Tukey-Kramer multiple comparisons tests. Radiographic marginal bone loss was measured at 1-year by using a digital subtraction technique and evaluated by using a repeated measures ANOVA. Pretreatment cone beam computed tomography (CBCT) images were used to measure a mean gray level that was proportional to bone mineral density (BMD) in the implant site. One-way mixed ANOVA was used to compare the mean gray level and average implant stability quotient (ISQ) loading. A Pearson correlation was also tested between those parameters (α=.05) for each statistical analysis. RESULTS The mean marginal bone loss at 1 year was 0.601 ±0.48 mm. Regarding probing depth measurements, a 2-way repeated measures ANOVA found both the location (P=.012) and time (P=.009) were significant. The Tukey-Kramer multiple comparisons test showed a significant difference between the buccal and distal site (P=.006) from baseline to 1-year follow-up. CONCLUSIONS Narrow diameter implants are a reliable treatment for replacing a missing lateral incisor in patients with a cleft palate at 1 year, with an implant survival rate of 100% and implant success rate of 94% using the established criteria. A negative association was found between the bone mineral density and the implant stability in the alveolar cleft site of a patient with a cleft palate. The peri-implant soft tissue probe depths exhibited significant change during the first year.
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Affiliation(s)
- Lisa A Knobloch
- Professor, Division of Restorative and Prosthetic Dentistry, The Ohio State University College of Dentistry, Columbus, Ohio.
| | - Peter Larsen
- Professor, Division of Oral and Maxillofacial Surgery, The Ohio State University College of Dentistry, Columbus, Ohio
| | - Edwin McGlumphy
- Professor Emeritus, Division of Restorative and Prosthetic Dentistry, The Ohio State University College of Dentistry, Columbus, Ohio; Private practice, Columbus, Ohio
| | - Do-Gyoon Kim
- Professor, Division of Orthodontics, The Ohio State University College of Dentistry, Columbus, Ohio
| | - Anita Gohel
- Clinical Professor, Division of Oral and Maxillofacial Radiology, University of Florida College of Dentistry, Gainesville, Fla
| | - Robin Messner
- Implant Patient Care Coordinator, Division of Restorative and Prosthetic Dentistry, The Ohio State University College of Dentistry, Columbus, Ohio
| | - Kyle J Fogarty
- Student, College of Arts and Sciences, The Ohio State University, Columbus, Ohio
| | - Matthew T Fogarty
- Student, Fisher College of Business, The Ohio State University, Columbus, Ohio
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Borges CD, Faria PEP, Pessôa de Oliveira PGF, Sales de Melo Soares M, Ricoldi MST, Costa MS, Novaes Júnior AB, Tambasco de Oliveira P, Taba Júnior M. Influence of collagen membrane on bone quality in titanium mesh reconstructions—Study in rats. J Periodontol 2020; 91:1673-1681. [DOI: 10.1002/jper.19-0399] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2019] [Revised: 12/28/2019] [Accepted: 01/08/2020] [Indexed: 11/10/2022]
Affiliation(s)
- Cristine D'Almeida Borges
- Department of Oral Surgery and Periodontology University of São Paulo – Ribeirão Preto School of Dentistry Ribeirão Preto SP Brazil
| | | | | | - Mariana Sales de Melo Soares
- Department of Oral Surgery and Periodontology University of São Paulo – Ribeirão Preto School of Dentistry Ribeirão Preto SP Brazil
| | - Milla Sprone Tavares Ricoldi
- Department of Oral Surgery and Periodontology University of São Paulo – Ribeirão Preto School of Dentistry Ribeirão Preto SP Brazil
| | - Monalisa Sena Costa
- Department of Dentistry University of Ribeirão Preto Ribeirão Preto SP Brazil
| | - Arthur Belém Novaes Júnior
- Department of Oral Surgery and Periodontology University of São Paulo – Ribeirão Preto School of Dentistry Ribeirão Preto SP Brazil
| | - Paulo Tambasco de Oliveira
- Department of Oral Surgery and Periodontology University of São Paulo – Ribeirão Preto School of Dentistry Ribeirão Preto SP Brazil
| | - Mário Taba Júnior
- Department of Oral Surgery and Periodontology University of São Paulo – Ribeirão Preto School of Dentistry Ribeirão Preto SP Brazil
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Solakoglu Ö, Götz W, Kiessling MC, Alt C, Schmitz C, Alt EU. Improved guided bone regeneration by combined application of unmodified, fresh autologous adipose derived regenerative cells and plasma rich in growth factors: A first-in-human case report and literature review. World J Stem Cells 2019; 11:124-146. [PMID: 30842809 PMCID: PMC6397807 DOI: 10.4252/wjsc.v11.i2.124] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/09/2018] [Revised: 12/07/2018] [Accepted: 01/10/2019] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Novel strategies are needed for improving guided bone regeneration (GBR) in oral surgery prior to implant placement, particularly in maxillary sinus augmentation (GBR-MSA) and in lateral alveolar ridge augmentation (LRA). This study tested the hypothesis that the combination of freshly isolated, unmodified autologous adipose-derived regenerative cells (UA-ADRCs), fraction 2 of plasma rich in growth factors (PRGF-2) and an osteoinductive scaffold (OIS) (UA-ADRC/PRGF-2/OIS) is superior to the combination of PRGF-2 and the same OIS alone (PRGF-2/OIS) in GBR-MSA/LRA. CASE SUMMARY A 79-year-old patient was treated with a bilateral external sinus lift procedure as well as a bilateral lateral alveolar ridge augmentation. GBR-MSA/LRA was performed with UA-ADRC/PRGF-2/OIS on the right side, and with PRGF-2/OIS on the left side. Biopsies were collected at 6 wk and 34 wk after GBR-MSA/LRA. At the latter time point implants were placed. Radiographs (32 mo follow-up time) demonstrated excellent bone healing. No radiological or histological signs of inflammation were observed. Detailed histologic, histomorphometric, and immunohistochemical analysis of the biopsies evidenced that UA-ADRC/PRGF-2/OIS resulted in better and faster bone regeneration than PRGF-2/OIS. CONCLUSION GBR-MSA with UA-ADRCs, PRGF-2, and an OIS shows effectiveness without adverse effects.
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Affiliation(s)
- Önder Solakoglu
- External Visiting Lecturer, Dental Department of the University Medical Center Hamburg-Eppendorf, Hamburg 20246, Germany
- Clinic for Periodontology and Implantology, Hamburg 22453, Germany.
| | - Werner Götz
- Department of Orthodontics, Center of Dento-Maxillo-Facial Medicine, University of Bonn, Bonn 53111, Germany
| | - Maren C Kiessling
- Institute of Anatomy, Faculty of Medicine, LMU Munich, Munich 80336, Germany
| | | | - Christoph Schmitz
- Institute of Anatomy, Faculty of Medicine, LMU Munich, Munich 80336, Germany
| | - Eckhard U Alt
- InGeneron GmbH, Munich 80331, Germany
- InGeneron, Inc., Houston, TX 77054, United States
- Isar Klinikum Munich, 80331 Munich, Germany
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Fuglsig JMDCES, Thorn JJ, Ingerslev J, Wenzel A, Spin-Neto R. Long term follow-up of titanium implants installed in block-grafted areas: A systematic review. Clin Implant Dent Relat Res 2018; 20:1036-1046. [PMID: 30238612 DOI: 10.1111/cid.12678] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2018] [Revised: 05/28/2018] [Accepted: 07/06/2018] [Indexed: 11/29/2022]
Abstract
BACKGROUND An enduring clinical question concerns the outcome (ie, success) of implants placed in areas grafted with block-grafts. OBJECTIVE To undertake a systematic review of the literature on the long term results (≥5 years) of implants placed in maxillofacial areas grafted with any type of osseous block-grafts in two-stage surgeries. Further, the review addresses how available success criteria were used within the studies. MATERIALS AND METHODS The MEDLINE (PubMed) and EMBASE bibliographic databases were searched up to March 2017 for studies evaluating the long term results of implants placed in grafted areas. The search strategy was restricted to English language publications using combined terms which referred to the treatment method (implants placed in areas grafted with bone blocks), and follow-up characteristics (≥5 years and assessment of at least one parameter related to implant success criteria). To qualify for inclusion, studies should present outcome measurements indicating the success (or at least the survival) of the implants. RESULTS The search strategy yielded 17 studies, which were included in this systematic review. These studies presented survival rates ranging from 88.7% (after 15 years follow-up) to 98.7% (after 5 years follow-up). Five studies presented data based on predefined success criteria with success rates ranging from 86.8% to 100%. In these studies, the term "success" was often not properly defined. CONCLUSION The long term survival (≥5 years) of implants placed into block-grafted areas in two-stage surgeries was not lower than 75%, while success rates ranged from 86.8% to 100%. Although it was possible to identify published success criteria for implant follow-up, there is no broad consensus on how to report implant success in a consistent manner.
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Affiliation(s)
| | - Jens Jørgen Thorn
- Department of Oral and Maxillofacial Surgery, Hospital of South Western Denmark, Esbjerg, Denmark
| | - Janne Ingerslev
- Department of Oral and Maxillofacial Surgery, Hospital of South Western Denmark, Esbjerg, Denmark
| | - Ann Wenzel
- Department of Dentistry and Oral Health-Oral Radiology, Aarhus University, Aarhus, Denmark
| | - Rubens Spin-Neto
- Department of Dentistry and Oral Health-Oral Radiology, Aarhus University, Aarhus, Denmark
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7
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Manfrini M, Mazzoni E, Barbanti-Brodano G, Nocini P, D'agostino A, Trombelli L, Tognon M. Osteoconductivity of Complex Biomaterials Assayed by Fluorescent-Engineered Osteoblast-like Cells. Cell Biochem Biophys 2016; 71:1509-15. [PMID: 25388843 DOI: 10.1007/s12013-014-0374-x] [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] [Indexed: 10/24/2022]
Abstract
Biomaterials employed for the bone regeneration can be assayed for specific features such as osteoconductivity and gene expression. In this study, the composite HA/collagen/chondroitin-sulfate biomaterial was investigated using an engineered human cell line, named Saos-eGFP. This cell line, a green fluorescent engineered human osteoblast-like cell, was employed as a cellular model for the in vitro study of biomaterial characteristics. The cytotoxicity was indirectly evaluated by fluorescence detection, osteoconductivity was assayed both by fluorescence and electron microscope analysis as well as cell morphology, whereas the RT-PCR technique was employed to assay gene expression. Saos-eGFP cells viability detection after 24 and 96 h of incubation showed that biomaterial enables the adhesion and proliferation of seeded cells as well as that of the plastic surface, the control. Fluorescence and scanning electron microscopy (SEM) analyses indicated that Saos-eGFP cells were homogeneously distributed on the HA granule surfaces, exhibiting cytoplasmic bridges, and were localized on the collagen-chondroitin sulfate extra-cellular matrix. An expression analysis of specific genes encoding for differentiation markers, showed that biomaterial assayed did not alter the osteogenic pathway of the Saos-eGFP cell line. Our assays confirm the cytocompatibility of this biomaterial, suggesting an osteoconductive capacity mediated by its chemical contents. We showed that the Saos-eGFP cellular model is suitable for in vitro biomaterial assays, and more specifically for assessing osteoconductivity. This result suggests that the cytocompatibility and osteoconductive features of the biomaterial assayed as bone substitute, could have a positive downstream effect on implant osteo-integration.
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Affiliation(s)
- Marco Manfrini
- Department of Morphology, Surgery and Experimental Medicine, School of Medicine, University of Ferrara, Ferrara, Italy
| | - Elisa Mazzoni
- Department of Morphology, Surgery and Experimental Medicine, School of Medicine, University of Ferrara, Ferrara, Italy
| | | | | | - Antonio D'agostino
- Department of Surgery, School of Medicine, University of Verona, Verona, Italy
| | - Leonardo Trombelli
- Research Centre for the Study of Periodontal and Peri-Implant Diseases, University of Ferrara, Ferrara, Italy
| | - Mauro Tognon
- Department of Morphology, Surgery and Experimental Medicine, School of Medicine, University of Ferrara, Ferrara, Italy.
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Kim DG, Elias KL, Jeong YH, Kwon HJ, Clements M, Brantley WA, Lee DJ, Han JS. Differences between buccal and lingual bone quality and quantity of peri-implant regions. J Mech Behav Biomed Mater 2016; 60:48-55. [PMID: 26773652 DOI: 10.1016/j.jmbbm.2015.12.036] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2015] [Revised: 12/22/2015] [Accepted: 12/23/2015] [Indexed: 10/22/2022]
Abstract
The objective of the current study was to examine whether peri-implant bone tissue properties are different between the buccal and lingual regions treated by growth factors. Four dental implant groups were used: titanium (Ti) implants, alumina-blasted zirconia implants (ATZ-N), alumina-blasted zirconia implants with demineralized bone matrix (DBM) (ATZ-D), and alumina-blasted zirconia implants with rhBMP-2 (ATZ-B). These implants were placed in mandibles of six male dogs. Nanoindentation elastic modulus (E) and plastic hardness (H) were measured for the buccal and lingual bone tissues adjacent and away from the implants at 3 and 6 weeks post-implantation. A total of 2281 indentations were conducted for 48 placed implants. The peri-implant buccal region had less bone quantity resulting from lower height and narrower width of bone tissue than the lingual region. Buccal bone tissues had significant greater mean values of E and H than lingual bone tissues at each distance and healing period (p<0.007). Nearly all implant treatment groups displayed lower mean values of the E at the lingual bone tissues than at the buccal bone tissues (p<0.046) although the difference was not significant for the Ti implant group (p=0.758). The DBM and rhBMP-2 treatments stimulated more peri-implant bone remodeling at the lingual region, producing more immature new bone tissues with lower E than at the buccal region. This finding suggests that the growth factor treatments to the zirconia implant system may help balance the quantity and quality differences between the peri-implant bone tissues.
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Affiliation(s)
- Do-Gyoon Kim
- Division of Orthodontics, College of Dentistry, The Ohio State University, Columbus, OH 43210, USA.
| | - Kathy L Elias
- Division of Orthodontics, College of Dentistry, The Ohio State University, Columbus, OH 43210, USA
| | - Yong-Hoon Jeong
- Division of Orthodontics, College of Dentistry, The Ohio State University, Columbus, OH 43210, USA
| | - Hyun-Jung Kwon
- Division of Orthodontics, College of Dentistry, The Ohio State University, Columbus, OH 43210, USA
| | - Matthew Clements
- Division of Orthodontics, College of Dentistry, The Ohio State University, Columbus, OH 43210, USA
| | - William A Brantley
- Division of Restorative Science and Prosthodontics, College of Dentistry, The Ohio State University, Columbus, OH 43210, USA
| | - Damian J Lee
- Division of Restorative Science and Prosthodontics, College of Dentistry, The Ohio State University, Columbus, OH 43210, USA
| | - Jung-Suk Han
- Department of Prosthodontics, Seoul National University, Seoul, Republic of Korea
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9
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“Tent-Pole” for Reconstruction of Large Alveolar Defects: A Case Report. J Oral Maxillofac Surg 2016; 74:55-67. [DOI: 10.1016/j.joms.2015.08.007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2015] [Revised: 07/31/2015] [Accepted: 08/06/2015] [Indexed: 11/17/2022]
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10
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Uehara S, Kurita H, Shimane T, Sakai H, Kamata T, Teramoto Y, Yamada S. Predictability of staged localized alveolar ridge augmentation using a micro titanium mesh. Oral Maxillofac Surg 2015; 19:411-416. [PMID: 26089132 DOI: 10.1007/s10006-015-0513-6] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2014] [Accepted: 06/09/2015] [Indexed: 06/04/2023]
Abstract
PURPOSE The aim of this study is to retrospectively evaluate the success rate of staged localized alveolar ridge augmentation using titanium micromesh. In addition, the factors that influenced the success were analyzed. METHODS Twenty-three alveolar ridges (posterior mandible 12, anterior maxilla 7, anterior and posterior maxilla 3, and posterior maxilla 1) were augmented using titanium micromesh and were retrospectively assessed. RESULTS Thirty sites were judged as successful with a success rate of 56.6 % (posterior mandible 58.3 %, anterior maxilla 57.1 %, anterior and posterior maxilla 33.3 %, and posterior maxilla 100 %). The span of the augmentation site was significantly correlated with the success rate (goodness test of fit for chi-square, p < 0.05). The success rate was low if infection of the grafted material was observed, while the exposure of titanium mesh had no negative impact. CONCLUSIONS This limited study suggested that the predictability of augmented bone volume in staged alveolar ridge augmentation using titanium micromesh was not sufficient to expect an ideal and planned implant placement. The success was influenced by the distance of the augmentation site and the infection of the graft material, which were associated with moderate to severe vertical ridge resorption and/or mechanical and functional loading on the surgical site.
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Affiliation(s)
- Shinobu Uehara
- Department of Dentistry and Oral Surgery, Shinshu University School of Medicine, 3-1-1 Asahi, Matsumoto, 390-8621, Japan
| | - Hiroshi Kurita
- Department of Dentistry and Oral Surgery, Shinshu University School of Medicine, 3-1-1 Asahi, Matsumoto, 390-8621, Japan.
| | - Tetsu Shimane
- Department of Dentistry and Oral Surgery, Shinshu University School of Medicine, 3-1-1 Asahi, Matsumoto, 390-8621, Japan
| | - Hironori Sakai
- Department of Dentistry and Oral and Maxillofacial Surgery, Nagano Municipal Hospital, Nagano, Japan
| | - Takahiro Kamata
- Department of Dentistry and Oral Surgery, Shinshu University School of Medicine, 3-1-1 Asahi, Matsumoto, 390-8621, Japan
| | - Yuji Teramoto
- Department of Dentistry and Oral Surgery, Shinshu University School of Medicine, 3-1-1 Asahi, Matsumoto, 390-8621, Japan
| | - Shinichi Yamada
- Department of Dentistry and Oral Surgery, Shinshu University School of Medicine, 3-1-1 Asahi, Matsumoto, 390-8621, Japan
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11
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Ananyan SG, Gunko MV, Zakaryan AV, Gvetadze SR. [Surgical aspects of alveolar bone augmentation]. STOMATOLOGII︠A︡ 2015; 94:47-52. [PMID: 26171546 DOI: 10.17116/stomat201594247-52] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Affiliation(s)
- S G Ananyan
- Russian Medical Academy of Post-Graduate Education, Moscow ,Central Research Institute of Dentistry and Maxillofacial Surgery, Moscow
| | - M V Gunko
- Russian Medical Academy of Post-Graduate Education, Moscow ,Central Research Institute of Dentistry and Maxillofacial Surgery, Moscow
| | - A V Zakaryan
- Russian Medical Academy of Post-Graduate Education, Moscow ,Central Research Institute of Dentistry and Maxillofacial Surgery, Moscow
| | - Sh R Gvetadze
- Russian Medical Academy of Post-Graduate Education, Moscow ,Central Research Institute of Dentistry and Maxillofacial Surgery, Moscow
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Abstract
PURPOSE The aim of this study was to determine the survival rate of short implants that were placed in a residency program. In addition, the potential influence of diabetes, smoking, sinus grafting, guided bone regeneration, and implant type on survival was analyzed. METHODS Through a retrospective chart review, patient information and parameters for short implants being equal or less than 10 mm and regular implants being more than 10 mm were collected. The cumulative survival rate and implant and patient information from 213 consecutively placed implants from May 2002 through October 2011 were analyzed. RESULTS The average survival time for short implants was 47.3 months, with a range of 6 to 141 months. The implant survival rate was 95.77% for short implants, which was not statistically significant from the regular implants. Smoking had a statistically significant negative effect on the survival rate of short implants. No statistical differences were found with implant survival rates for other factors. CONCLUSION It can be concluded that short implants can be predictably placed in the mouth with a high survival rate and that smoking has a negative influence on the survival rate of the short implants.
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13
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Poli PP, Beretta M, Cicciù M, Maiorana C. Alveolar ridge augmentation with titanium mesh. A retrospective clinical study. Open Dent J 2014; 8:148-58. [PMID: 25317209 PMCID: PMC4192861 DOI: 10.2174/1874210601408010148] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2014] [Revised: 06/24/2014] [Accepted: 07/10/2014] [Indexed: 11/22/2022] Open
Abstract
An adequate amount of bone all around the implant surface is essential in order to obtain long-term success of implant restoration. Several techniques have been described to augment alveolar bone volume in critical clinical situations, including guided bone regeneration, based on the use of barrier membranes to prevent ingrowth of the epithelial and gingival connective tissue cells. To achieve this goal, the use of barriers made of titanium micromesh has been advocated. A total of 13 patients were selected for alveolar ridge reconstruction treatment prior to implant placement. Each patient underwent a tridimensional bone augmentation by means of a Ti-mesh filled with intraoral autogenous bone mixed with deproteinized anorganic bovine bone in a 1:1 ratio. Implants were placed after a healing period of 6 months. Panoramic x-rays were performed after each surgical procedure and during the follow-up recalls. Software was used to measure the mesial and the distal peri-implant bone loss around each implant. The mean peri-implant bone loss was 1.743 mm on the mesial side and 1.913 mm on the distal side, from the top of the implant head to the first visible bone-implant contact, at a mean follow-up of 88 months. The use of Ti-mesh allows the regeneration of sufficient bone volume for ideal implant placement. The clinical advantages related to this technique include the possibility of correcting severe vertical atrophies associated with considerable reductions in width and the lack of major complications if soft-tissue dehiscence and mesh exposures do occur.
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Affiliation(s)
- Pier P Poli
- Department of Oral Surgery and Implantology, University of Milan, School of Dentistry, IRCSS Cà Granda, Milan, Italy
| | - Mario Beretta
- Department of Dental Implants. Maxillo-Facial and Odontostomatology Unit, Fondazione Cà Granda IRCCS Ospedale, Maggiore Policlinico. University of Milan, Milan, Italy
| | - Marco Cicciù
- Department of Human Pathology, School of Dentistry. University of Messina, Policlinico G. Martino, Messina, Italy
| | - Carlo Maiorana
- Department of Dental Implants. Maxillo-Facial and Odontostomatology Unit, Fondazione Cà Granda IRCCS Ospedale, Maggiore Policlinico. University of Milan, Milan, Italy
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14
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Simultaneous implant placement and bone grafting with particulate mineralized allograft in sites with buccal wall defects, a three-year follow-up and review of literature. J Craniomaxillofac Surg 2014; 42:552-9. [DOI: 10.1016/j.jcms.2013.07.026] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2013] [Revised: 06/07/2013] [Accepted: 07/31/2013] [Indexed: 12/18/2022] Open
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Duan C, Liu J, Yuan Z, Meng G, Yang X, Jia S, Zhang J, Chen S. Adenovirus-mediated transfer of VEGF into marrow stromal cells combined with PLGA/TCP scaffold increases vascularization and promotes bone repair in vivo. Arch Med Sci 2014; 10:174-81. [PMID: 24701231 PMCID: PMC3953961 DOI: 10.5114/aoms.2012.30950] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/11/2011] [Revised: 10/25/2011] [Accepted: 12/23/2011] [Indexed: 02/07/2023] Open
Abstract
INTRODUCTION Large osseous defect remains a serious clinical problem due to the lack of sufficient blood supply and it has been proposed that this situation can be relieved by accelerating the formation of new vessels in the process of bone defect repair. The aim of this study was to develop a new type of artificial bone by transferring the VEGF gene into marrow stromal cells (MSCs) and seeding them into a porous scaffold. MATERIAL AND METHODS An adenovirus vector was employed to transfer the VEGF gene into MSCs and expression of the exogenous gene was confirmed by ELISA. Next the transduced cells were seeded into a collagen I modified PLGA/TCP scaffold. The constructed new complex artificial bone was then assessed for biocompatibility in vitro and blood vessel formation and bone formation in vivo. RESULTS We found that adenovirus mediated VEGF gene transfer into MSCs sustained VEGF expression in MSCs for 3 weeks. Porous scaffold PLGA/TCP made by rapid prototyping technology exhibited improved biocompatibility resulting from crosslinking with collagen I. Furthermore, the in vivo study showed that large amounts of blood vessels were detected histologically 1 week after artificial bone implantation, and significant bone formation was detected 8 weeks after implantation. CONCLUSIONS Our findings suggest that gene transfer of VEGF into MSCs combined with PLGA/TCP scaffold enhances bone repair in vivo by promoting vascularization.
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Affiliation(s)
- Chunguang Duan
- Department of Orthopaedics and Traumatology, Xijing Hospital, Fourth Military Medical University, Xi'an, PR China
| | - Jian Liu
- Department of Orthopaedics and Traumatology, Xijing Hospital, Fourth Military Medical University, Xi'an, PR China
| | - Zhi Yuan
- Department of Orthopaedics and Traumatology, Xijing Hospital, Fourth Military Medical University, Xi'an, PR China
| | - Guolin Meng
- Department of Orthopaedics and Traumatology, Xijing Hospital, Fourth Military Medical University, Xi'an, PR China
| | - Xiumei Yang
- Department of Ophthalmology, Xijing Hospital, Fourth Military Medical University, Xi'an, PR China
| | - Shuaijun Jia
- Department of Orthopaedics and Traumatology, Xijing Hospital, Fourth Military Medical University, Xi'an, PR China
| | - Jinkang Zhang
- Department of Orthopaedics and Traumatology, Xijing Hospital, Fourth Military Medical University, Xi'an, PR China
| | - Shi Chen
- Department of Orthopaedics and Traumatology, Xijing Hospital, Fourth Military Medical University, Xi'an, PR China
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Xing ZC, Chang KW, Chun S, Kim S, Kang IK. Immobilization of collagen on hydroxyapatite discs by covalent bonding and physical adsorption and their interaction with MC3T3-E1 osteoblasts. Tissue Eng Regen Med 2014. [DOI: 10.1007/s13770-013-1107-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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17
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Imanieh H, Aghahosseini H. Synthesis and character investigation of new collagen Hydrolysate/polyvinyl alcohol/hydroxyapatite Polymer-Nano-Porous Membranes: I. Experimental design optimization in thermal and structural properties. SYSTEMS AND SYNTHETIC BIOLOGY 2013; 7:175-84. [PMID: 24432154 PMCID: PMC3824816 DOI: 10.1007/s11693-013-9110-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2013] [Accepted: 06/07/2013] [Indexed: 12/24/2022]
Abstract
ABSTRACT Development of bioorganic-inorganic composites has drawn eyes to extensive attention in biomedical fields and tissue engineering. So many attempts to prepare hydroxyapatite (HA), in conjunction with various binders including polyvinyl alcohol (PVA), and collagen has performed for late 20 years. We applied a method based on the phase separation for making of polymer porous membranes. This procedure is induced through the addition of a small quantity of water (polymer-rich phase) to a solution with HA precursors (polymer-poor phase). Thermal and structural composite properties of collagen Hydrolysate (CH)-PVA/HA Polymer-Nano-Porous Membranes were analyzed by Design of experiment that was undertaken using D-optimal approach, to select the optimal combination of nano composites precursor. The resulted composite characters were investigated by Fourier transform infrared, scanning electron microscopy (SEM) and thermal gravimetric analysis. Based on the SEM images, this new method could be clearly concluded to porous CH-PVA/HA hybrid materials. Finally the hemocompatibility of nanocomposite membranes were evaluated by the hemolysis study.
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Affiliation(s)
- Hossein Imanieh
- Department of Chemistry, Faculty of Science, IKIU, Qazvin, Iran
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18
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Cecconi S, Mattioli-Belmonte M, Manzotti S, Orciani M, Piccioli A, Gigante A. Bone-derived titanium coating improvesin vivoimplant osseointegration in an experimental animal model. J Biomed Mater Res B Appl Biomater 2013; 102:303-10. [DOI: 10.1002/jbm.b.33008] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2013] [Revised: 05/14/2013] [Accepted: 07/15/2013] [Indexed: 11/11/2022]
Affiliation(s)
- Stefano Cecconi
- Department of Clinical and Molecular Sciences; Università Politecnica delle Marche; Ancona Italy
| | - Monica Mattioli-Belmonte
- Department of Clinical and Molecular Sciences; Università Politecnica delle Marche; Ancona Italy
| | - Sandra Manzotti
- Department of Clinical and Molecular Sciences; Università Politecnica delle Marche; Ancona Italy
| | - Monia Orciani
- Department of Clinical and Molecular Sciences; Università Politecnica delle Marche; Ancona Italy
| | - Andrea Piccioli
- Centro Oncologico Palazzo Baleani; Policlinico Umberto I; Rome Italy
| | - Antonio Gigante
- Department of Clinical and Molecular Sciences; Università Politecnica delle Marche; Ancona Italy
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19
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Kassim B, Ivanovski S, Mattheos N. Current perspectives on the role of ridge (socket) preservation procedures in dental implant treatment in the aesthetic zone. Aust Dent J 2013; 59:48-56. [DOI: 10.1111/adj.12098] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/02/2013] [Indexed: 11/28/2022]
Affiliation(s)
- B Kassim
- Private Practice; Brisbane Queensland Australia
| | - S Ivanovski
- Griffith University; Gold Coast Queensland Australia
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20
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Clementini M, Morlupi A, Agrestini C, Barlattani A. Immediate versus delayed positioning of dental implants in guided bone regeneration or onlay graft regenerated areas: a systematic review. Int J Oral Maxillofac Surg 2013; 42:643-50. [PMID: 23481543 DOI: 10.1016/j.ijom.2013.01.018] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2012] [Revised: 12/18/2012] [Accepted: 01/24/2013] [Indexed: 11/29/2022]
Abstract
The aim of this study was to compare success rates in immediate and delayed dental implant placement following guided bone regeneration or onlay bone block ridge augmentation. A systematic review of all studies on this topic was performed. For inclusion, studies had to involve at least five patients, report specific success criteria, and have a minimum follow-up period of 6 months. Studies reporting only the survival rate of implants were excluded. From 287 studies identified, 79 were screened and 13 were included in the analysis. Six studies provided data on simultaneous (immediate) positioning of implants, five studies on delayed positioning, and two studies provided data on both of these approaches. Success rates for implants placed using a simultaneous approach ranged from 61.5% to 100%; success rates for implants placed using a staged approach ranged from 75% to 98%. Even though the current review revealed that there are not many studies reporting data relevant to the analyzed topic, the data obtained suggest that the delayed positioning of implants should be considered more predictable than the immediate positioning. Studies presenting a control group and adopting standardized success criteria are required, and data from this review must be considered indicative.
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Affiliation(s)
- M Clementini
- Department of Dentistry, University Tor Vergata, Rome, Italy.
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21
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Kolerman R, Nissan J, Tal H. Combined osteotome-induced ridge expansion and guided bone regeneration simultaneous with implant placement: a biometric study. Clin Implant Dent Relat Res 2013; 16:691-704. [PMID: 23350624 DOI: 10.1111/cid.12041] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
PURPOSE To evaluate the long-term outcome of a single-step ridge expansion osteotome procedure and implant placement combined with guided bone regeneration in patients presenting narrow maxillary alveolar ridges. MATERIALS AND METHODS During the period 1999 to 2010, 41 patients aged 19 to 77 years (18 males; 23 females) suffering from partial or full edentulism associated with horizontal resorption of the maxillary ridges (2.5-5 mm) were treated using the combined ridge expansion and guided bone-regeneration techniques to obtain an improved bony base for implant placement. Implant survival, bone width measurements, clinical and radiologic implant success, and clinical complications were recorded and analyzed. RESULTS Achievement of primary stability of the implant was impossible at six sites; these were recorded as failures. In the remaining 35 patients, one hundred sixteen endosseous titanium implants were simultaneously placed. Follow-up time varied between 6 and 144 months (mean 52.4); of these, 36% were followed up for periods of time longer than 60 months. Implant diameter and lengths varied between 3.3 to 4.8 and 12 to 16 mm, respectively. In the 35 successful procedures (one hundred sixteen implants), the overall implant survival rate was 100%. An average gain in ridge width was 3.5 ± 0.93 (p < .0001) and an average enlargement of the buccal bone was 1.91 ± 0.6 (p < .0001). The mean vertical mesial bone loss was 1.81 mm ± 1.07 (ranging from 0.3 to 4.2 mm), and the mean vertical distal bone loss was 1.74 mm ± 1.12 (ranging from 0.4 to 4.5 mm). In eight patients (32%), at least one implant presented bone loss of ≥3 mm. CONCLUSIONS Within the limitations of this study, we suggest that the combined osteotome-induced ridge expansion and guided bone regeneration simultaneous with implant placement is a reliable procedure with reduced morbidity and may offer an alternative in suitable situations.
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Affiliation(s)
- Roni Kolerman
- Department of Periodontology and Dental Implantology, The Maurice and Gabriela Goldschleger School of Dental Medicine, Tel-Aviv University, Tel-Aviv, Israel
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Verket A, Lyngstadaas SP, Rønold HJ, Wohlfahrt JC. Osseointegration of dental implants in extraction sockets preserved with porous titanium granules - an experimental study. Clin Oral Implants Res 2012. [DOI: 10.1111/clr.12070] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Anders Verket
- Department of Biomaterials; Institute of Clinical Odontology; University of Oslo; Oslo Norway
| | - Ståle P. Lyngstadaas
- Department of Biomaterials; Institute of Clinical Odontology; University of Oslo; Oslo Norway
| | - Hans J. Rønold
- Department of Prosthodontics; Institute of Clinical Odontology, University of Oslo; Oslo Norway
| | - Johan C. Wohlfahrt
- Department of Biomaterials; Institute of Clinical Odontology; University of Oslo; Oslo Norway
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Sager M, Ferrari D, Wieland M, Dard M, Becker J, Schwarz F. Immunohistochemical characterization of wound healing at two different bone graft substitutes. Int J Oral Maxillofac Surg 2012; 41:657-66. [DOI: 10.1016/j.ijom.2011.11.017] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2009] [Revised: 10/07/2009] [Accepted: 11/08/2011] [Indexed: 01/13/2023]
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24
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Clementini M, Morlupi A, Canullo L, Agrestini C, Barlattani A. Success rate of dental implants inserted in horizontal and vertical guided bone regenerated areas: a systematic review. Int J Oral Maxillofac Surg 2012; 41:847-52. [PMID: 22542079 DOI: 10.1016/j.ijom.2012.03.016] [Citation(s) in RCA: 98] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2011] [Revised: 01/15/2012] [Accepted: 03/16/2012] [Indexed: 10/28/2022]
Abstract
This study assessed the success rate of implants placed in horizontal and vertical guided bone regenerated areas. A systematic review was carried out of all prospective and retrospective studies, involving at least five consecutively treated patients, that analysed the success rate of implants placed simultaneously or as second surgery following ridge augmentation by means of a guided bone regeneration (GBR) technique. Studies reporting only the survival rate of implants and studies with a post-loading follow up less than 6 months were excluded. From 323 potentially relevant studies, 32 full text publications were screened and 8 were identified as fulfilling the inclusion criteria. The success rate of implants placed in GBR augmented ridges ranged from 61.5% to 100%; all studies, apart from three, reported a success rate higher than 90% (range 90-100%). The data obtained demonstrated that GBR is a predictable technique that allows the placement of implants in atrophic areas. Despite that, studies with well-defined implant success criteria after a longer follow-up are required.
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Affiliation(s)
- M Clementini
- Department of Dentistry, University Tor Vergata, Rome, Italy.
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Thoma DS, Dard MM, Hälg GA, Ramel CF, Hämmerle CHF, Jung RE. Evaluation of a biodegradable synthetic hydrogel used as a guided bone regeneration membrane: an experimental study in dogs. Clin Oral Implants Res 2011; 23:160-168. [PMID: 21692857 DOI: 10.1111/j.1600-0501.2011.02217.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
OBJECTIVES To test whether or not an experimental polyethylene glycol (PEG) membrane maintains the bone graft volume and contributes to the preservation of the ridge contour in comparison with a commercially available synthetic membrane. MATERIALS AND METHODS In 18 dogs, all mandibular premolars and the first molars were extracted. Ten weeks later, acute standardized defects were prepared. The defects of four dogs were randomly assigned to three modalities: (1) PEG plus deproteinized bovine bone mineral (DBBM) (PEG), (2) a resorbable glycolide trimethylene carbonate membrane plus DBBM (PGA-TMC), and (3) DBBM alone (DBBM). These dogs were then sacrificed for the baseline measurements. The remaining defects of 14 dogs were randomly assigned to (1) PEG plus DBBM, (2) PGA-TMC plus DBBM, (3) DBBM, and (4) empty defect. The dogs were sacrificed at baseline (n=4), 4 weeks (n=7), or at 16 weeks (n=7). Mixed model regressions and the non-parametric Brunner-Langer method were applied for statistical analysis. RESULTS At baseline, equal tissue augmentation was observed in all groups. At 4 and 16 weeks, the greatest augmented area fractions were calculated for PEG (103%; 107%, respectively), followed by PGA-TMC (98%; 91%), DBBM (85%; 78%), and empty (46%; 54%), being statistically significant different (P<0.001) between PEG and empty at 4 and 16 weeks, and PEG and DBBM at 16 weeks. The overall decrease (P≤0.01) in the amount of bone graft between baseline and 16 weeks was -14% (PEG), -22% (PGA-TMC), and -23% (DBBM). CONCLUSIONS The study demonstrates that the combination of the PEG membrane with DBBM maintains the bone graft volume over time better than controls. The PEG membrane with DBBM was also the most effective method to preserve the ridge contour.
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Affiliation(s)
- Daniel S Thoma
- Clinic of Fixed and Removable Prosthodontics and Dental Material Science, Center for Dental Medicine, Zurich, SwitzerlandInstitut Straumann AG, Basel, Switzerland
| | - Michel M Dard
- Clinic of Fixed and Removable Prosthodontics and Dental Material Science, Center for Dental Medicine, Zurich, SwitzerlandInstitut Straumann AG, Basel, Switzerland
| | - Gian-Andrea Hälg
- Clinic of Fixed and Removable Prosthodontics and Dental Material Science, Center for Dental Medicine, Zurich, SwitzerlandInstitut Straumann AG, Basel, Switzerland
| | - Christian F Ramel
- Clinic of Fixed and Removable Prosthodontics and Dental Material Science, Center for Dental Medicine, Zurich, SwitzerlandInstitut Straumann AG, Basel, Switzerland
| | - Christoph H F Hämmerle
- Clinic of Fixed and Removable Prosthodontics and Dental Material Science, Center for Dental Medicine, Zurich, SwitzerlandInstitut Straumann AG, Basel, Switzerland
| | - Ronald E Jung
- Clinic of Fixed and Removable Prosthodontics and Dental Material Science, Center for Dental Medicine, Zurich, SwitzerlandInstitut Straumann AG, Basel, Switzerland
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Liu HY, Liu X, Zhang LP, Ai HJ, Cui FZ. Improvement on the performance of bone regeneration of calcium sulfate hemihydrate by adding mineralized collagen. Tissue Eng Part A 2010; 16:2075-84. [PMID: 20136401 DOI: 10.1089/ten.tea.2009.0669] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Comparative investigations of bone regeneration performance for calcium sulfate hemihydrate (CaSO(4).(1/2)H(2)O; CSH) only and CSH with mineralized collagen are reported in this article. The mineralized collagen is the nanohydroxyapatite/collagen (nHAC). The investigations included biocompatibility in vitro and performance of bone repair in vivo. Quantitative and qualitative biocompatibility assays with bone stromal stem cells were performed. A critical box-shaped defect model in the mandible of the rabbit was used to evaluate the bone-remodeling ability of CSH and nHAC/CSH. Results in vitro indicated that the nHAC/CSH significantly improved bioactivity compared with that of CSH, especially in promoting cell adhesion. Further, a higher bone remodeling activity was observed around nHAC/CSH composite than the CSH, especially at the early stage of remodeling. This result means that nHAC/CSH could cause an earlier accelerator and better osseointegration for bone repair than CSH only.
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Affiliation(s)
- Huan-Ye Liu
- Department of Prosthodontics, School of Stomatology, China Medical University, Shenyang, China
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27
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Cai YZ, Wang LL, Cai HX, Qi YY, Zou XH, Ouyang HW. Electrospun nanofibrous matrix improves the regeneration of dense cortical bone. J Biomed Mater Res A 2010; 95:49-57. [DOI: 10.1002/jbm.a.32816] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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Marinucci L, Balloni S, Becchetti E, Bistoni G, Calvi EM, Lumare E, Ederli F, Locci P. Effects of Hydroxyapatite and Biostite® on Osteogenic Induction of hMSC. Ann Biomed Eng 2010; 38:640-8. [DOI: 10.1007/s10439-009-9898-4] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2009] [Accepted: 12/30/2009] [Indexed: 10/20/2022]
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Chiapasco M, Zaniboni M. Clinical outcomes of GBR procedures to correct peri-implant dehiscences and fenestrations: a systematic review. Clin Oral Implants Res 2009; 20 Suppl 4:113-23. [DOI: 10.1111/j.1600-0501.2009.01781.x] [Citation(s) in RCA: 196] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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Thoma DS, Halg GA, Dard MM, Seibl R, Hammerle CHF, Jung RE. Evaluation of a new biodegradable membrane to prevent gingival ingrowth into mandibular bone defects in minipigs. Clin Oral Implants Res 2009; 20:7-16. [PMID: 19126102 DOI: 10.1111/j.1600-0501.2008.01604.x] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
OBJECTIVE The aim of this study was to test whether a synthetic, biodegradable membrane made of polyethylene glycol (PEG) can prevent soft-tissue ingrowth into alveolar defects. MATERIAL AND METHODS In each of 16 minipigs, three mandibular premolars were bilaterally extracted. Three months later, acute standardized defects (diameter 8 mm, depth 8 mm) were prepared. Four treatment modalities were randomly allocated to the defects: (1) PEG membrane plus collagen sponge, (2) polylactide (PLA) membrane plus collagen sponge, (3) collagen sponge alone, and (4) empty defect. Animals were sacrificed at 10 days (n=5), 21 days (n=5), or 2 months (n=6) after treatment. Qualitative and quantitative histological evaluations of soft-tissue ingrowth and bone regeneration were performed on nondecalcified ground sections. For statistical analysis, the Mann-Whitney-Wilcoxon test, the Kruskal-Wallis, and the paired t-test were applied. P-values were adjusted using the Dunnett-Hsu adjustment. RESULTS At 10 days, the PEG membrane group showed the least soft-tissue ingrowth (mean value -0.75 mm; range -1.35 to -0.10), followed by the PLA membrane group -0.18 mm (-0.80 to 0.44), the collagen group 0.04 mm (-0.65 to 0.73), and the empty defects 0.60 mm (-0.08 to 1.29). Statistically significant differences were observed between the PEG membrane group and the empty defects (P<0.05). At 21 days, the highest percentage of newly formed bone was found in the PEG membrane group (mean 28.4%; range 21.6-35.2) compared with 23.7% (16.9-30.5; PLA membrane), 15.2% (8.2-22.2; collagen group), and 21.6% (14.5-28.8; empty defects). Statistically significant differences were only found between the PEG membrane group and the collagen group (P<0.05). At 2 months, the tested parameters revealed no statistically significant differences between the groups. CONCLUSION The experimental PEG membrane applied in the present study successfully prevented collapse of the covering soft tissues to a degree similar to the PLA membrane. The combination of a collagen sponge and the PEG membrane showed the least soft-tissue ingrowth at 10 days and promoted more bone formation at 21 days.
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Affiliation(s)
- Daniel S Thoma
- Clinic for Fixed and Removable Prosthodontics and Dental Material Science, University of Zurich, Zurich, Switzerland.
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31
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Jung RE, Windisch SI, Eggenschwiler AM, Thoma DS, Weber FE, Hämmerle CHF. A randomized-controlled clinical trial evaluating clinical and radiological outcomes after 3 and 5 years of dental implants placed in bone regenerated by means of GBR techniques with or without the addition of BMP-2. Clin Oral Implants Res 2009; 20:660-6. [PMID: 19489935 DOI: 10.1111/j.1600-0501.2008.01648.x] [Citation(s) in RCA: 85] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
OBJECTIVE The aim of this randomized-controlled clinical trial was to evaluate the long-term outcome of implants placed in bone augmented with a xenogenic bone substitute material and a collagen membrane with or without the addition of recombinant human bone morphogenetic protein-2 (rhBMP-2). MATERIAL AND METHODS Eleven patients received a total of 34 implants placed into sites exhibiting lateral bone defects. In a split mouth design, the defects were randomly treated with the graft material and the collagen membrane either with (test) or without (control) rhBMP-2. The patients were examined 3 and 5 years after insertion of the prosthetic restoration. Student's paired t-test was performed to detect differences between the two groups. RESULTS The survival rate at 3 and 5 years was 100% for both groups. The peri-implant soft tissues were stable and healthy without any difference between the two groups. The prosthetic reevaluation demonstrated four loose prosthetic screws during the first 3 years and seven ceramic chippings after 3 and 5 years. The mean distance between the first bone to implant contact to implant abutment junction at 3 years was 1.37 mm (test), 1.22 mm (control), and 1.38 mm (test), and 1.23 mm (control) at 5 years. The difference of <0.2 mm between test and control implants was not statistically significant. The mean change of the marginal bone level between baseline and 5 years ranged from -0.07 mm (mesial, test), -0.11 mm (distal, test), -0.03 mm (mesial, control), to +0.13 mm (distal, control). No statistically significant differences were observed between test and control sites. CONCLUSION Implants placed in bone augmented with and without rhBMP-2 revealed excellent clinical and radiological outcomes after 3 and 5 years.
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Affiliation(s)
- Ronald E Jung
- Clinic for Fixed and Removable Prosthodontics and Dental Material Science, University of Zurich, Zurich, Switzerland.
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32
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Akagawa Y, Kubo T, Koretake K, Hayashi K, Doi K, Matsuura A, Morita K, Takeshita R, Yuan Q, Tabata Y. Initial bone regeneration around fenestrated implants in Beagle dogs using basic fibroblast growth factor–gelatin hydrogel complex with varying biodegradation rates. J Prosthodont Res 2009; 53:41-7. [DOI: 10.1016/j.jpor.2008.08.009] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2008] [Accepted: 07/22/2008] [Indexed: 11/15/2022]
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Pieri F, Corinaldesi G, Fini M, Aldini NN, Giardino R, Marchetti C. Alveolar Ridge Augmentation With Titanium Mesh and a Combination of Autogenous Bone and Anorganic Bovine Bone: A 2-Year Prospective Study. J Periodontol 2008; 79:2093-103. [DOI: 10.1902/jop.2008.080061] [Citation(s) in RCA: 71] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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34
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Geurs NC, Korostoff JM, Vassilopoulos PJ, Kang TH, Jeffcoat M, Kellar R, Reddy MS. Clinical and Histologic Assessment of Lateral Alveolar Ridge Augmentation Using a Synthetic Long-Term Bioabsorbable Membrane and an Allograft. J Periodontol 2008; 79:1133-40. [DOI: 10.1902/jop.2008.070595] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Hao W, Hu YY, Wei YY, Pang L, Lv R, Bai JP, Xiong Z, Jiang M. Collagen I gel can facilitate homogenous bone formation of adipose-derived stem cells in PLGA-beta-TCP scaffold. Cells Tissues Organs 2007; 187:89-102. [PMID: 17938566 DOI: 10.1159/000109946] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/25/2007] [Indexed: 01/22/2023] Open
Abstract
Cell-based tissue engineering is thought to be a new therapy for treatment of bone defects and nonunions after trauma and tumor resection. In this study, we explore the in vitro and in vivo osteogenesis of a novel biomimetic construct fabricated by using collagen I gel to suspend rabbit adipose-derived stem cells (rASCs) into a porous poly(lactic-co-glycolic)acid-beta-tricalcium phosphate (PLGA-beta-TCP) scaffold (rASCs-COL/PLGA-beta-TCP). In vitro and in vivo studies of the rASCs-COL/PLGA-beta-TCP composite (group A) were carried out compared with the single combination of rASCs and PLGA-beta-TCP (rASCs/PLGA-beta-TCP; group B), the combination of acellular collagen I gel and PLGA-beta-TCP (COL/PLGA-beta-TCP; group C), and the PLGA-beta-TCP scaffold (group D). Composites of different groups were cultured in vitro for 2 weeks in osteogenic medium and then implanted into the autologous muscular intervals for 8 weeks. After 2 weeks of in vitro culture, alkaline phosphatase activity and extracellular matrix mineralization in group A were significantly higher than in group B (p < 0.01, n = 4). In vivo osteogenesis was evaluated by radiographic and histological analyses. The calcification level was radiographically evident in group A, whereas no apparent calcification was observed in groups B, C and D (n = 4). In group A, woven bone with a trabecular structure was formed, while in group B, only osteoid tissue was observed. Meanwhile, the bone-forming area in group A was significantly higher than in group B (p < 0.01, n = 4). No bone formation was observed in groups C or D (n = 4). In conclusion, by using collagen I gel to suspend rASCs into porous PLGA-beta-TCP scaffold, osteogenic differentiation of rASCs can be improved and homogeneous bone tissue can be successfully formed in vivo.
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Affiliation(s)
- Wei Hao
- Institute of Orthopaedics, Xijing Hospital,Fourth Military Medical University, Xi'an, PR China
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Weiss P, Layrolle P, Clergeau LP, Enckel B, Pilet P, Amouriq Y, Daculsi G, Giumelli B. The safety and efficacy of an injectable bone substitute in dental sockets demonstrated in a human clinical trial. Biomaterials 2007; 28:3295-305. [DOI: 10.1016/j.biomaterials.2007.04.006] [Citation(s) in RCA: 92] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2007] [Accepted: 04/02/2007] [Indexed: 11/27/2022]
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Corinaldesi G, Pieri F, Marchetti C, Fini M, Aldini NN, Giardino R. Histologic and Histomorphometric Evaluation of Alveolar Ridge Augmentation Using Bone Grafts and Titanium Micromesh in Humans. J Periodontol 2007; 78:1477-84. [PMID: 17668966 DOI: 10.1902/jop.2007.070001] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
BACKGROUND Recently, the use of titanium micromesh for alveolar bone augmentation has drawn interest; however, only limited histologic data are available on the quality of the bone regenerated. Therefore, this study compared the use of 100% intraoral autogenous bone to a combination of intraoral autogenous bone (70%) and bovine porous bone mineral (BPBM) (30%) for alveolar ridge augmentation with titanium micromesh histologically and histomorphometrically. METHODS Twelve partially edentulous patients required alveolar bone augmentation before implant insertion because of ridge resorption. The defect sites, six in the maxilla and six in the mandible, were reconstructed with particulate autologous bone (control group, N = 6) or a mixture of autologous bone and BPBM (test group, N = 6) in combination with titanium micromesh. Core biopsies were taken from the defect sites 8 to 9 months after grafting at the time of implant insertion. RESULTS Newly formed compact bone with a well-organized lamellar pattern was identified in all specimens. In the samples taken from the test group, the BPBM particles were surrounded completely by newly formed bone with no signs of resorption. The mean total bone volume was 62.38% +/- 13.02% in the control group and 52.88% +/- 11.47% in the test group. The soft tissue volume was 37.61% +/- 13.02% and 29.96% +/- 12.58%, respectively, and the residual BPBM volume was 17.15% +/- 2.72% in the test group. No statistical difference was observed in the histologic parameters evaluated, irrespective of graft type and site (P >0.05). CONCLUSION Within the limits of this study, BPBM (30%) in combination with autogenous bone (70%) did not yield a lower percentage of new bone formed compared to autogenous bone alone in ridge augmentation with titanium micromesh.
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Affiliation(s)
- Giuseppe Corinaldesi
- Department of Odontostomatological Sciences, University of Bologna, Bologna, Italy
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Kojima T, Amizuka N, Suzuki A, de Freitas PHL, Yoshizawa M, Kudo A, Saito C, Maeda T. Histological examination of bone regeneration achieved by combining grafting with hydroxyapatite and thermoplastic bioresorbable plates. J Bone Miner Metab 2007; 25:361-73. [PMID: 17968488 DOI: 10.1007/s00774-007-0763-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/01/2007] [Accepted: 04/10/2007] [Indexed: 10/22/2022]
Abstract
In this study, we present a novel guided bone regeneration (GBR) concept that consists of combining Boneject, a bone substitute containing atelocollagen and bovine hydroxyapatite particles, with thermoplastic, bioresorbable plates (DeltaSystem) known to resist mechanical loading. In rat calvariae, standardized bone defects were filled with Boneject and covered with a convex DeltaSystem plate. Tissue from rats at 1, 2, 4, 8, and 12 weeks postoperation were fixed with an aldehyde solution, and the new bone formed at the defects was histologically assessed. At 1 week, alkaline phosphatase (ALP)-negative cells deriving from the bottom region of the defect could be found up to half the height of the cavity. Boneject particle surfaces in the bottom region revealed an intense osteopontin immunopositivity whereas those in the upper region did not. Tartrate-resistant acid phosphatase (TRAP)-positive osteoclasts accumulated on the surfaces of osteopontin-coated particles. A newly formed, woven-like bone featuring ALP-positive osteoblasts extended from the native bone. At the second week, the newly formed woven bone had surrounded the Boneject particles. Cement lines, which indicate active bone remodeling, could be observed in the new bone despite its immaturity. Four weeks after surgery, the new bone had reached the height of the DeltaSystem plate, and just beneath it a periostin-positive fibrous layer covered the mix of new bone and Boneject particles. By then, despite having acceptable histological features, electron probe microanalyzer (EPMA) and transmission electron microscope (TEM) analyses revealed that the new bone could not be regarded as compact bone. At 8 and 12 weeks, the new bone showed compact bone-like features according to TEM and EPMA assessments. Summarizing, the combination of a bone substitute such as Boneject and a rigid, bioresorbable plate appears to be osteoconductive and to promote bone remodeling, leading to the genesis of a tissue similar to the one that is regarded as the "gold standard" for bone regeneration: the compact bone.
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Affiliation(s)
- Taku Kojima
- Division of Reconstructive Surgery for Oral and Maxillofacial Region, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
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Hayashi K, Kubo T, Doi K, Tabata Y, Akagawa Y. Development of New Drug Delivery System for Implant Bone Augmentation Using a basic Fibroblast Growth Factor-gelatin Hydrogel Complex. Dent Mater J 2007; 26:170-7. [PMID: 17621931 DOI: 10.4012/dmj.26.170] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
This study sought to clarify the effectiveness of bFGF-gelatin hydrogel complex on bone regeneration around implants for the development of a new drug delivery system for bone augmentation. Twenty-four titanium implants (03.3 mmX 10 mm) were placed into edentulous areas of the mandibles of four beagle dogs with the upper four screw threads exposed at buccal side. bFGF-gelatin hydrogel complex with 0, 0.1, 1, 10, 100 microg bFGF or autogenous bone (as control) then filled the bone defect site to cover the exposed screw threads. After eight weeks, tissue specimens including implants were evaluated histologically and histomorphometrically. Histological observation showed new bone formation around exposed screw threads in the groups with 1, 10, 100 microg bFGF and autogenous bone-a striking contrast to the groups with contents of 0 and 0.1 microg bFGF. These results thus suggested that bFGF-gelatin hydrogel complex using an optimum amount of bFGF was useful for bone augmentation around implants.
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Affiliation(s)
- Kazuhiko Hayashi
- Department of Advanced Prosthodontics, Division of Cervico-Gnathostomatology, Programs for Applied Biomedicine, Hiroshima University Graduate School of Biomedical Sciences, 1-2-3 Kasumi, Minami-ku Hiroshima 734-8553, Japan.
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Chiapasco M, Zaniboni M, Boisco M. Augmentation procedures for the rehabilitation of deficient edentulous ridges with oral implants. Clin Oral Implants Res 2006; 17 Suppl 2:136-59. [PMID: 16968389 DOI: 10.1111/j.1600-0501.2006.01357.x] [Citation(s) in RCA: 359] [Impact Index Per Article: 19.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
OBJECTIVES To analyze publications related to augmentation procedures and to evaluate the success of different surgical techniques for ridge reconstruction and the survival/success rates of implants placed in the augmented areas. MATERIAL AND METHODS Clinical investigations published in English involving at least 5 patients and with a minimum follow-up of 6 months were included. The following procedures were considered: a) Guided bone regeneration (GBR); 2) Onlay bone grafts; 3) Inlay grafts; 4) Bone splitting for ridge expansion (RE); 5) Distraction osteogenesis (DO); and 6) Revascularized flaps. Success rates of augmentation procedures and related morbidity, as well as survival and success rates of implants placed in the augmented sites were analyzed. RESULTS Success rates of surgical procedures ranged from 60% to 100% for GBR, from 92% to 100% for onlay bone grafts, from 98% to 100% for ridge expansion techniques, from 96,7% to 100% for DO, and was 87.5% for revascularized flaps, whereas survival rates of implants ranged from 92% to 100% for GBR, from 60% to 100% for onlay bone grafts, from 91% to 97.3% for RE, from 90.4% to 100% for DO, and, finally, was 88.2% for revascularized flaps. CONCLUSION On the basis of available data it was shown that it was difficult to demonstrate that a particular surgical procedure offered better outcome as compared to another. The main limit encountered in this review has been the overall poor methodological quality of the published articles. Therefore larger well-designed long term trials are needed.
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Affiliation(s)
- Matteo Chiapasco
- Unit of Oral Surgery, Department of Medicine, Surgery, and Dentistry, San Paolo Hospital, University of Milan, Milan, Italy.
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Ogino Y, Ayukawa Y, Kukita T, Koyano K. The contribution of platelet-derived growth factor, transforming growth factor-beta1, and insulin-like growth factor-I in platelet-rich plasma to the proliferation of osteoblast-like cells. ACTA ACUST UNITED AC 2006; 101:724-9. [PMID: 16731390 DOI: 10.1016/j.tripleo.2005.08.016] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2005] [Revised: 07/14/2005] [Accepted: 08/15/2005] [Indexed: 11/18/2022]
Abstract
The aim of this study was to investigate the effect of platelet-rich plasma (PRP) on the proliferation of osteoblast-like cells in vitro. PRP was prepared using a centrifuge; the number of platelets (n = 32) and the levels of platelet-derived growth factor-AB (PDGF-AB), transforming growth factor-beta1 (TGF-beta1), and insulin-like growth factor-I (IGF-I) were measured (n = 16). For the proliferation assay, SaOS-2 was cultured in the presence of platelet-poor plasma (PPP), whole blood, or PRP. The cell number was counted after 36 and 72 hours. To investigate the effect of each growth factor, the cells were cultured with PRP in the absence or presence of neutralizing antibodies, and counted as described. The mean platelet count of PRP was 1546.36 +/- 382.25 x 10(3)/microL, and the mean levels of PDGF-AB, TGF-beta1 and IGF-I were 0.271 +/- 0.043, 0.190 +/- 0.039, and 0.110 +/- 0.039 ng/1500 x 10(3) platelets, respectively. Cell proliferation was enhanced in all PRP groups in a dose-dependent manner, and all neutralizing antibodies significantly suppressed proliferation compared with the PRP group, lacking antibody, at 36 hours. However, at 72 hours, the neutralizing antibodies of PDGF and TGF-beta1, but not IGF-I, significantly suppressed proliferation. These results show the beneficial abilities of PRP in the proliferation of osteoblast-like cells from the standpoint of growth factors, including the contribution of each factor.
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Affiliation(s)
- Yoichiro Ogino
- Section of Removable Prosthodontics, Division of Oral Rehabilitation, Faculty of Dental Science, Kyushu University, Japan.
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Rammelt S, Schulze E, Witt M, Petsch E, Biewener A, Pompe W, Zwipp H. Collagen Type I Increases Bone Remodelling around Hydroxyapatite Implants in the Rat Tibia. Cells Tissues Organs 2005; 178:146-57. [PMID: 15655332 DOI: 10.1159/000082245] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/08/2004] [Indexed: 11/19/2022] Open
Abstract
The early interface reaction of cancellous bone to a nanocrystalline hydroxyapatite (HA) cement containing 3 wt% collagen type I (HA/Coll) with a setting under physiological temperature and pH was observed using immunohistochemical techniques. Pure HA served as a control. Cylinders with a diameter of 2 mm were implanted into the proximal tibia of 72 adult Wistar rats. Histological sections of 6 animals were prepared after 1, 2, 4, 6, 14 and 28 days. First, osteoblast-like cells as well as a marked reaction for osteonectin, osteopontin and its ligand CD44 were observed as early as 2 days after implantation at the interface around HA/Coll implants. Further, reactivity for ED1 and cathepsin D, both markers for phagocytotic cells, appeared earlier and stronger around HA/Coll. In cell counts, a significantly higher average number of ED1- and cathepsin D-positive phagocytotic cells was observed around the HA/Coll implants on days 6 (p < 0.01), 14 and 28 (p < 0.05). The number of osteopontin-positive cells was significantly higher around HA/Coll implants at days 6 and 14 (p < 0.05). Two weeks after the implantation, first islands of newly formed woven bone were observed around the HA/Coll implant, but not around the control implant. The amount of direct bone contact after 28 days averaged 28% around pure HA and 51% around HA/Coll implants (p < 0.05). While both implants displayed a good osteoconductivity, a higher bone remodelling activity was observed around collagen-containing HA implants compared to pure HA implants. It appears that the addition of collagen to HA implants can enhance both phagocytotic and osteogenic processes. This may result in an earlier acceptance and better osseointegration of the HA/Coll implants into the surrounding tissue.
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Affiliation(s)
- Stefan Rammelt
- Department of Trauma and Reconstructive Surgery, University Hospital Carl Gustav Carus, Technical University Dresden, DE-01307 Dresden, Germany.
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Brugnami F, Caleffi C. Prosthetically driven Implant Placement. How to achieve the appropriate implant site development. Keio J Med 2005; 54:172-8. [PMID: 16452826 DOI: 10.2302/kjm.54.172] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Dental implants are established alternatives for replacing missing teeth. Tooth loss for different reasons may leads to alveolar resorption. Shortage of bone can prevent proper positioning of dental implants according to prosthetic needs and treatment planning, unless the volume of hard and soft tissues is increased before implantation. In the esthetic area it is essential not only to achieve well-anchored implants but also sufficient soft and hard tissue in order to obtain natural looking result. This article will present several treatment modalities to augment the soft and hard tissues in order to obtain proper insertion of implants according to prosthetic needs and patient satisfaction.
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Rammelt S, Schulze E, Bernhardt R, Hanisch U, Scharnweber D, Worch H, Zwipp H, Biewener A. Coating of titanium implants with type-I collagen. J Orthop Res 2004; 22:1025-34. [PMID: 15304275 DOI: 10.1016/j.orthres.2004.02.011] [Citation(s) in RCA: 97] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/11/2003] [Accepted: 02/18/2004] [Indexed: 02/04/2023]
Abstract
PURPOSE Type-I collagen, the major structural protein in bone, has beneficial properties regarding bone regeneration. Little is known about the potential effects of collagen coating on orthopedic implants. METHODS 3 to 6 microg/cm2 of lyophilized type-I collagen was absorbed on titanium rods. Six coated and uncoated pins of 0.9 mm diameter were inserted into the tibia of adult male Wistar rats for 1, 2, 4, 7, 14, and 28 days. Specimens were embedded in methacrylate-based Technovit 9100N resin. From one portion cutting and grinding sections were obtained. The implant was removed from the other half that was depolymerized, sectioned, and mounted for immunohistochemistry. RESULTS At day 4, the interface around the collagen-coated implants displayed a granulation tissue with higher numbers of cathepsin D-positive mononucleated cells compared to the uncoated implants (p<0.05). Active osteoblasts, reactive for osteopontin, were increased around the collagen-coated pins at day 4 and 7 (p<0.01). After 28 days of implantation, direct bone contact averaged 74.9% around the collagen-coated implants and 62.1% around uncoated implants (NS). The amount of newly formed bone averaged 76.3% around the collagen-coated pins and 67.8% around the uncoated pins (NS). The histomorphometric findings were confirmed by SRmicroCT in two specimens. CONCLUSIONS The earlier observation of mononuclear phagocytozing cells and the earlier and higher expression of bone-specific matrix proteins suggest an increased early bone remodeling around titanium pins through collagen coating. A tendency towards increased bone formation was observed around the coated implants.
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Affiliation(s)
- Stefan Rammelt
- Department of Trauma and Reconstructive Surgery, University Hospital Carl Gustav Carus, Dresden, Germany.
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Ersanli S, Olgac V, Leblebicioglu B. Histologic Analysis of Alveolar Bone Following Guided Bone Regeneration. J Periodontol 2004; 75:750-6. [PMID: 15212358 DOI: 10.1902/jop.2004.75.5.750] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
BACKGROUND Questions on new bone quality following guided bone regeneration (GBR) with various graft materials and its importance in osseointegration have been raised. This study reports histologic analysis of bone sections from future implant sites at upper and lower jaws that were augmented with bovine porous bone mineral graft material plus a porcine collagen membrane. METHODS Due to severe atrophy of the alveolar crest, GBR prior to implant placement was indicated in 11 patients (mean age 45.5 years). Following an average of 7 months of healing, implant placement surgery was performed. Bone sections from implant beds were fixed in formalin, decalcified in sodium citrate and formic acid, and placed in paraffin. Sections 5 to 7 microm thick were prepared, stained with hematoxylin and eosin, and analyzed under light microscopy. Results for 27 implant sites are presented. RESULTS Compared to the lower jaw, segments from the upper jaw had a lower percentage of bone and higher percentage of residual material and vascularization. CONCLUSIONS Within the limits of this study, we concluded that osteogenesis is completed and the rate of vascularization and osteoclastic activity was reduced by 7 months. Also, the upper jaw significantly differed from the lower jaw in bone formation, vascularization, and the amount of residual material. Thus, the anatomical location of the defect may be as important as the properties of the graft material used in obtaining successful osteogenesis using guided bone regeneration techniques.
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Affiliation(s)
- S Ersanli
- Department of Oral Implantology, School of Dentistry, Istanbul University, Istanbul, Turkey
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Schliephake H, Tavassol F, Gelinsky M, Dard M, Sewing A, Pompe W. Use of a mineralized collagen membrane to enhance repair of calvarial defects in rats. Clin Oral Implants Res 2004; 15:112-8. [PMID: 14731184 DOI: 10.1111/j.1600-0501.2004.00992.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
The aim of the present study was to evaluate mineralized collagen membranes for enhancement of bone regeneration in calvarial defects. Forty adult female Sprague-Dawley rats received calvarial full thickness defects with a diameter of 8 mm. In 20 animals, the defects were covered with a mineralized collagen membrane, and 20 animals served as controls. After 6, 13, 26 and 52 weeks, bone regeneration was evaluated using undecalcified thick-section histometry. There was no clear enhancement of bone regeneration during the first 26 weeks after the operation. Bone regeneration underneath the membrane produced consistently thicker bone, albeit without statistical significance. Accumulation of membrane material occurred in the center of the defects surrounded by multinuclear giant cells during early stages of healing. After complete resorption of the membrane, significantly increased bone formation was seen after 52 weeks in the defects that had received membrane coverage. It was concluded that mineralization in the present form did not increase mechanical strength of the membrane to prevent interference of the membrane with bone regeneration in the defect. The reason for the increase in bone formation after resorption of the membrane after 26 weeks remains to be clarified.
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Affiliation(s)
- Henning Schliephake
- Department of Oral and Maxillofacial Surgery, George-Augusta-University, Goettingen, Germany.
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Affiliation(s)
- Christoph H F Hämmerle
- Clinic for Fixed and Removable Prosthodontics, Center for Dental and Oral Medicine and Cranio-Maxillofacial Surgery, University of Zürich, Switzerland
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Abstract
BACKGROUND Osseointegrated implants have been documented as efficacious, however, their placement may be contraindicated in some patients due to insufficient bone volume. Techniques such as guided bone regeneration (GBR), immediate implantation, and distraction osteogenesis (DO) have been utilized as ridge enhancement therapies. RATIONALE This systematic review evaluates dental implant survival rates in patients treated with ridge augmentation or preservation techniques. FOCUSED QUESTION In patients requiring dental implant placement, what is the effect of localized ridge preservation versus implant placement without augmentation on implant survival and adverse effects? SEARCH PROTOCOL MEDLINE and Cochrane Oral Health Group Specialized Trial Register were searched. Hand searches were performed on Clinical Oral Implants Research, International Journal of Oral and Maxillofacial Implants, International Journal of Periodontics and Restorative Dentistry, Journal of Clinical Periodontology, Journal of Periodontology, and Journal of Periodontal Research. All searches were performed for articles published through April 2002. SELECTION CRITERIA Publications reporting survival rate of dental implants following ridge therapy were included in the analysis. Reports describing techniques were excluded. DATA COLLECTION AND ANALYSIS Due to the absence of controlled studies, a meta-analysis was not performed. Descriptive statistics are used to report the data. MAIN RESULTS 1. A total of 18 studies were included: 13 reporting on guided bone regeneration (GBR, 1,741 patients) and 5 on distraction osteogenesis (DO, 92 patients). 2. There is a high level of predictable implant survival in sites treated by GBR or DO. 3. These survival rates are similar to those of implants placed in native bone. REVIEWERS' INTERPRETATIONS: Survival rates were similar for both GBR and DO implants. These survival rates were similar to implants placed in native bone.
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Affiliation(s)
- Joseph P Fiorellini
- Department of Oral Medicine, Infection, and Immunity, Division of Periodontology, Harvard School of Dental Medicine, Boston, Massachusetts, USA.
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Sanada JT, Rodrigues JGR, Canova GC, Cestari TM, Taga EM, Taga R, Buzalaf MAR, Granjeiro JM. Análise histológica, radiográfica e do perfil de imunoglobulinas após implantação de enxerto de osso esponjoso bovino desmineralizado em bloco em músculo de ratos. J Appl Oral Sci 2003; 11:209-15. [DOI: 10.1590/s1678-77572003000300010] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2003] [Accepted: 06/12/2003] [Indexed: 01/13/2023] Open
Abstract
O objetivo deste trabalho foi avaliar a biocompatibilidade de blocos de enxerto de osso bovino esponjoso acelular e desmineralizado (Gen-Ox®, Baumer S.A.). Um bloco cilíndrico (5x12mm) de material de enxerto foi implantado em músculo abdutor da coxa de 30 ratos, sendo os animais sacrificados 3, 7, 14, 21 e 28 dias (n=6) após as cirurgias. Após a tomada das radiografias, as peças foram removidas para o processamento histológico. A análise histológica mostrou que nos períodos de 3 e 7 dias foi evidenciado um processo inflamatório agudo, caracterizado pela presença de neutrófilos, reabsorção do coágulo sanguíneo e angiogênese. Entre 14 e 21 dias, verificou-se a reabsorção da matriz implantada por células mononucleadas, raras células gigantes e sua substituição por tecido conjuntivo fibroso rico em vasos e células. Aos 28 dias, na maioria dos casos, observou-se apenas pequenos fragmentos de matriz implantada envolto por tecido conjuntivo característico da região. Radiograficamente, não se notou evidências de mineralização. Com base nos resultados obtidos concluímos que o enxerto de matriz de osso esponjoso bovino desmineralizado em bloco é biocompatível quando implantado em tecido conjuntivo intramuscular de ratos, sendo absorvido e substituído por tecido conjuntivo característico da região, sem qualquer indício de ocorrência de osteogênese ectópica.
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Hämmerle CHF, Jung RE, Feloutzis A. A systematic review of the survival of implants in bone sites augmented with barrier membranes (guided bone regeneration) in partially edentulous patients. J Clin Periodontol 2003; 29 Suppl 3:226-31; discussion 232-3. [PMID: 12787222 DOI: 10.1034/j.1600-051x.29.s3.14.x] [Citation(s) in RCA: 204] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The aim of the present systematic review was to assess the survival of implants in regenerated bone applying the method of guided bone regeneration (GBR) compared with the survival of implants in non-regenerated bone. Studies to be included in this review needed to provide at least 12-month results following prosthetic reconstruction of titanium implants in bone regenerated by GBR with or without membrane supporting materials. The outcome measures were implant survival described as presence of implant, implant success (according to the criteria in the respective study), absence of clinical implant mobility, absence of implant fracture, absence of progressive peri-implant crestal bone loss as assessed on radiographs without clinical signs of peri-implant infection, absence of peri-implant infection with suppuration. A MEDLINE search and a hand search of relevant scientific journals were conducted including studies from the year 1990 to May 2001. A total of 11 studies could be identified fulfilling the inclusion criteria. All studies except two had the characteristics of case series or cross-sectional surveys. The two different studies had both test and control implants included in their analysis and qualified as controlled clinical trials. Cumulative success or survival rates, respectively, for implants in regenerated bone ranged from 100% after 5 years to 79.4% after 5 years of function. Regarding survival data, no significant differences were found in the controlled clinical trials between implants in regenerated compared to implants in non-regenerated bone. Within the limits of this systematic review characterized by second and third levels of evidence, the following conclusions can be drawn: The survival rate of implants placed into sites with regenerated/augmented bone using barrier membranes varied between 79% and 100% with the majority of studies indicating more than 90% after at least one year of function. The survival rates obtained in the present systematic review are similar to those generally reported for implants placed conventionally into sites without the need for bone augmentation.
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Affiliation(s)
- Christoph H F Hämmerle
- Clinic for Fixed & Removable Prosthodontics and Dental Material Science, University of Zurich, Switzerland.
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