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Lee MY, Park JH, Chang NY, Chae JM. Interdisciplinary treatment of mutilated dentition and transverse maxillary deficiency with microimplant-assisted rapid palatal expansion, microimplants, and dental implants. J ESTHET RESTOR DENT 2024; 36:239-249. [PMID: 37766643 DOI: 10.1111/jerd.13139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2023] [Revised: 09/08/2023] [Accepted: 09/11/2023] [Indexed: 09/29/2023]
Abstract
OBJECTIVE This case report demonstrates an interdisciplinary approach to treat a 26-year-old male patient with hyperdivergent Class II skeletal pattern, maxillary transverse deficiency, slight anterior open bite, and multiple hopeless teeth with root rests. CLINICAL CONSIDERATIONS An interdisciplinary treatment was required for oral hygiene improvement, caries treatment, extraction of residual roots and hopeless teeth, maxillary expansion using microimplant-assisted rapid palatal expansion, improvement of skeletal and dental relationship using orthodontic microimplants, and prosthetic restorations with the aid of dental implants. CONCLUSION Consequently, esthetic and functional occlusal rehabilitation was achieved. CLINICAL SIGNIFICANCE Hyperdivergent Class II facial and skeletal patterns with multiple missing teeth can be effectively treated using orthodontic skeletal anchorage. In young adults, the transverse discrepancy can be resolved using MARPE, which is also useful for improving the sagittal and vertical relationships. In the case of multiple missing teeth, orthodontic treatment can provide the proper space to facilitate dental implants to achieve optimal esthetics and function.
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Affiliation(s)
- Mi-Young Lee
- Department of Orthodontics, Seoul National University Gwan-ak Dental Hospital, Seoul, South Korea
| | - Jae Hyun Park
- Postgraduate Orthodontic Program, Arizona School of Dentistry and Oral Health, A.T. Still University, Mesa, Arizona, USA
- Graduate School of Dentistry, Kyung Hee University, Seoul, South Korea
| | - Na-Young Chang
- Department of Orthodontics, School of Dentistry, University of Wonkwang, Wonkwang Dental Research Institute, Iksan, South Korea
| | - Jong-Moon Chae
- Postgraduate Orthodontic Program, Arizona School of Dentistry and Oral Health, A.T. Still University, Mesa, Arizona, USA
- Department of Orthodontics, School of Dentistry, University of Wonkwang, Wonkwang Dental Research Institute, Iksan, South Korea
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Nie Q, Li C, Yang J, Yao Y, Sun H, Jiang T, Grzegorzek M, Chen A, Chen H, Hu W, Li R, Zhang J, Wang D. OII-DS: A benchmark Oral Implant Image Dataset for object detection and image classification evaluation. Comput Biol Med 2023; 167:107620. [PMID: 37922604 DOI: 10.1016/j.compbiomed.2023.107620] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Revised: 10/06/2023] [Accepted: 10/23/2023] [Indexed: 11/07/2023]
Abstract
In recent years, there is been a growing reliance on image analysis methods to bolster dentistry practices, such as image classification, segmentation and object detection. However, the availability of related benchmark datasets remains limited. Hence, we spent six years to prepare and test a bench Oral Implant Image Dataset (OII-DS) to support the work in this research domain. OII-DS is a benchmark oral image dataset consisting of 3834 oral CT imaging images and 15240 oral implant images. It serves the purpose of object detection and image classification. To demonstrate the validity of the OII-DS, for each function, the most representative algorithms and metrics are selected for testing and evaluation. For object detection, five object detection algorithms are adopted to test and four evaluation criteria are used to assess the detection of each of the five objects. Additionally, mean average precision serves as the evaluation metric for multi-objective detection. For image classification, 13 classifiers are used for testing and evaluating each of the five categories by meeting four evaluation criteria. Experimental results affirm the high quality of our data in OII-DS, rendering it suitable for evaluating object detection and image classification methods. Furthermore, OII-DS is openly available at the URL for non-commercial purpose: https://doi.org/10.6084/m9.figshare.22608790.
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Affiliation(s)
- Qianqing Nie
- Microscopic Image and Medical Image Analysis Group, College of Medicine and Biological Information Engineering, Northeastern University, Shenyang, China; Key Laboratory of Intelligent Computing in Medical Image, Ministry of Education, Northeastern University, Shenyang, Liaoning, China
| | - Chen Li
- Microscopic Image and Medical Image Analysis Group, College of Medicine and Biological Information Engineering, Northeastern University, Shenyang, China; Key Laboratory of Intelligent Computing in Medical Image, Ministry of Education, Northeastern University, Shenyang, Liaoning, China.
| | - Jinzhu Yang
- Key Laboratory of Intelligent Computing in Medical Image, Ministry of Education, Northeastern University, Shenyang, Liaoning, China
| | - Yudong Yao
- Department of Electrical and Computer Engineering, Stevens Institute of Technology, USA
| | - Hongzan Sun
- Shengjing Hospital, China Medical University, Shenyang, China
| | - Tao Jiang
- School of Intelligent Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, China; International Joint Institute of Robotics and Intelligent Systems, Chengdu University of Information Technology, Chengdu, China
| | - Marcin Grzegorzek
- Institute of Medical Informatics, University of Luebeck, Luebeck, Germany; Department of Knowledge Engineering, University of Economics in Katowice, Katowice, Poland
| | - Ao Chen
- Microscopic Image and Medical Image Analysis Group, College of Medicine and Biological Information Engineering, Northeastern University, Shenyang, China
| | - Haoyuan Chen
- Microscopic Image and Medical Image Analysis Group, College of Medicine and Biological Information Engineering, Northeastern University, Shenyang, China
| | - Weiming Hu
- Microscopic Image and Medical Image Analysis Group, College of Medicine and Biological Information Engineering, Northeastern University, Shenyang, China
| | - Rui Li
- Microscopic Image and Medical Image Analysis Group, College of Medicine and Biological Information Engineering, Northeastern University, Shenyang, China
| | - Jiawei Zhang
- Microscopic Image and Medical Image Analysis Group, College of Medicine and Biological Information Engineering, Northeastern University, Shenyang, China
| | - Danning Wang
- Center of Implant Dentistry, School and Hospital of Stomatology, China Medical University, Liaoning Provincial Key Laboratory of Oral Diseases, Shenyang, China.
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Afshari Z, Yaghini J, Naseri R. LEVELS OF SMOKING AND PERI‑IMPLANT MARGINAL BONE LOSS: A SYSTEMATIC REVIEW AND META-ANALYSIS. J Evid Based Dent Pract 2022; 22:101721. [PMID: 36162899 DOI: 10.1016/j.jebdp.2022.101721] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Revised: 02/09/2022] [Accepted: 03/13/2022] [Indexed: 10/18/2022]
Abstract
AIM This systematic review and meta-analysis sought to determine if there was a significantly enhanced risk of peri‑implant marginal bone loss (MBL) due to the increased number of cigarettes smoked per day. MATERIALS AND METHODS Six databases, including Medline, Embase, Cochrane Library, Web of Science, Scopus, and ProQuest, were searched until February, 2021. The search terms "dental implant, oral implant, smoking, smoker, non-smoker, marginal bone loss and crestal bone loss" were used in combination to seek the articles providing data for MBL related to the smoking habit. Articles were excluded if the quantity of cigarettes smoked per day was not reported. Random-effects meta-analyses were used to pool the estimates of mean difference (MD) with 95% confidence intervals (CI). RESULTS Eight studies were included for qualitative and 5 for quantitative synthesis. The meta-analyses revealed higher levels of MBL in patients who smoked <10 or >10 cigarettes/day than in non-smokers (<10: (MD -0.33, 95% CI -0.69-0.03 and >10: MD -0.58, 95% CI -0.96- -0.19). There was a significant risk of MBL between patients who smoked >10 and <10 cigarettes/day (MD -0.23, 95% CI -0.47-0.01). CONCLUSION It seems the risk of MBL is steadily increasing as daily smoking increases.
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Affiliation(s)
- Zohreh Afshari
- Dental Implants Research Center, Department of Periodontics, Dental research institute, School of dentistry, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Jaber Yaghini
- Dental Implants Research Center, Department of Periodontics, Dental research institute, School of dentistry, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Roohollah Naseri
- Dental Research Center, Department of Periodontics, Dental Research Institute, School of Dentistry, Isfahan University of Medical Science, Isfahan, Iran.
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Assaf M. Dental Implant Therapeutic Trends Among Dentists in Palestine: A Cross-Sectional Questionnaire Study. Cureus 2022; 14:e24301. [PMID: 35607572 PMCID: PMC9123343 DOI: 10.7759/cureus.24301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2022] [Accepted: 04/18/2022] [Indexed: 11/28/2022] Open
Abstract
BACKGROUND Dental implants require good surgical and prosthetic skills with special training for successful treatment outcomes. AIM To assess the knowledge of the dental practitioners in Palestine about the therapeutic trends in implant dentistry. MATERIALS AND METHODS The present study is a cross-sectional questionnaire study among dental practitioners registered in Palestinian dental association. All practitioners who consented and completely filled the questionnaire were included in the study. All participants were asked basic demographic questions, and their attitude towards basic and advanced dental implant trends was assessed. Chi-square test was used to associate a correlation between the area of location of the clinic and responses to the questionnaire (p<0.05). RESULTS Most of the dental practitioners were aware about the basic implant therapeutic trends. However, since most of the practitioners included in the present study had limited years of experience, they referred the advanced implant procedures to senior practitioners. CONCLUSION Dental practitioners in Palestine have good knowledge on the dental implant therapeutic trends. However, they do not carry out the advanced implant procedures and usually refer them to senior practitioners. There is no variation in the knowledge of the implant therapeutic trends based on varying locations of dental clinics.
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Kido R, Kido JI, Nishikawa Y, Sakamoto E, Tomotake Y, Yumoto H. Diagnosis of inflammatory peri-implant diseases using an immunochromatographic assay for calprotectin in peri-implant crevicular fluid. Int J Implant Dent 2021; 7:106. [PMID: 34623545 PMCID: PMC8498755 DOI: 10.1186/s40729-021-00386-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Accepted: 10/03/2021] [Indexed: 02/06/2023] Open
Abstract
Background The incidence rate of peri-implant diseases is increasing with implant placement. Early detection of peri-implant diseases is important to prevent and treat these diseases, and a simple and objective diagnostic method is expected. Immunochromatographic (IC) assays are used for rapid diagnostic methods for some diseases. The aim of this clinical study was to determine the amount of calprotectin, an inflammatory marker, in peri-implant crevicular fluid (PICF) using an IC chip, and estimate the possibility of this diagnostic system. Methods Forty-six individuals with dental implants participated in a pilot study. PICF samples were collected from the peri-implant sites with or without inflammation after clinical examinations including probing depth (PD), bleeding on probing (BOP) and gingival index (GI). Calprotectin in PICF was determined by an IC chip and enzyme-linked immunosorbent assay (ELISA) for calprotectin. The density of calprotectin line on the IC chip was measured using an IC reader (IC reader value). The relationship between IC reader value and ELISA value or clinical parameters was investigated. A receiver operating characteristic (ROC) curve analysis of IC reader value of calprotectin was performed to predict inflammation in peri-implant diseases. Results IC reader value of calprotectin was significantly correlated with its ELISA value and PD. IC reader values of calprotectin in PICF samples from periodontal sites with GI-1 and GI-2, and with BOP-positive sites were significantly higher than those of PICF samples from GI-0 sites, and BOP-negative sites, respectively. The IC reader value for calprotectin in PICF samples from inflammatory diseased sites was significantly higher than that of non-diseased sites. ROC analysis suggested that the IC reader value of PICF calprotectin was useful for predicting inflammatory peri-implant diseases. Conclusion IC assay for PICF calprotectin may be a possible system for diagnosing the inflammatory peri-implant diseases.
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Affiliation(s)
- Rie Kido
- Department of Periodontology and Endodontology, Institute of Biomedical Sciences, Tokushima University Graduate School, 3-18-15 Kuramoto, Tokushima, 770-8504, Japan
| | - Jun-Ichi Kido
- Department of Periodontology and Endodontology, Institute of Biomedical Sciences, Tokushima University Graduate School, 3-18-15 Kuramoto, Tokushima, 770-8504, Japan.
| | | | - Eijiro Sakamoto
- Department of Periodontology and Endodontology, Institute of Biomedical Sciences, Tokushima University Graduate School, 3-18-15 Kuramoto, Tokushima, 770-8504, Japan
| | - Yoritoki Tomotake
- Oral Implant Center, Tokushima University Hospital, Tokushima, Japan
| | - Hiromichi Yumoto
- Department of Periodontology and Endodontology, Institute of Biomedical Sciences, Tokushima University Graduate School, 3-18-15 Kuramoto, Tokushima, 770-8504, Japan
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Liaw JJL, Park JH, Chang CC, Wang SH, Tsai BMY. An interdisciplinary approach to orthodontic treatment of a mutilated Class III malocclusion with mini-implants, dental implants, and an autotransplant. J ESTHET RESTOR DENT 2021; 34:281-296. [PMID: 34617363 DOI: 10.1111/jerd.12819] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Revised: 09/02/2021] [Accepted: 09/13/2021] [Indexed: 11/28/2022]
Abstract
This case report demonstrates the interdisciplinary treatment of a 24-year-old female. Her skeletal discrepancy, anterior crossbite, mutilated dentition, and midline deviation made it challenging to achieve satisfactory treatment results, especially without major orthognathic surgery. This article thoroughly discusses the decision-making process associated with various treatment alternatives, the biomechanical considerations with temporary skeletal anchorage devices, and the detailed operational process of dental implant restoration and autotransplantation. CLINICAL SIGNIFICANCE: Orthodontic treatment aims to obtain better facial and dental esthetics, achieve functional occlusion, and improve oral health. Treatment of patients with a mutilated dentition requires interdisciplinary teamwork from a group of professionals with various types of expertise. Orthodontists should be the navigator that generates the tooth movement and space redistribution, thus facilitating the subsequent functional rehabilitation under a well-organized occlusal architecture. Autotransplantation offers an economical and biologically-friendly opportunity to replace a missing tooth.
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Affiliation(s)
- Johnny Joung-Lin Liaw
- Department of Orthodontics, National Taiwan University Hospital, Taipei, Taiwan.,Beauty Forever Dental Clinic, Taipei, Taiwan
| | - Jae Hyun Park
- Postgraduate Orthodontic Program, Arizona School of Dentistry & Oral Health, A.T. Still University, Mesa, Arizona, USA.,Graduate School of Dentistry, Kyung Hee University, Seoul, South Korea
| | | | | | - Betty Meng-Yun Tsai
- Department of Orthodontics, National Taiwan University Hospital, Taipei, Taiwan.,Beauty Forever Dental Clinic, Taipei, Taiwan
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Relevant Design Aspects to Improve the Stability of Titanium Dental Implants. MATERIALS 2020; 13:ma13081910. [PMID: 32325667 PMCID: PMC7216269 DOI: 10.3390/ma13081910] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/08/2020] [Revised: 04/10/2020] [Accepted: 04/15/2020] [Indexed: 11/16/2022]
Abstract
Post-extractional implants and immediate loading protocols are becoming much more frequent in everyday clinical practice. Given the existing literature about tapered implants, the objective of this paper was to understand whether implant shape had a direct influence on the results of the insertion torque (IT) and implant stability quotient (ISQ). Seven tapered implant prototypes were developed and distributed into three groups and compared with a control cylindrical implant-VEGA by Klockner Implant System. The implants were inserted into bovine bone type III according to Lekholm and Zarb Classification. The sample size was n = 30 for the three groups. Final IT was measured with a torquemeter, and the ISQ was measured with Penguin Resonance Frequency Analysis (RFA). Modifications done to the Prototype I did not reveal higher values of the ISQ and IT when compared to VEGA. In the second group, when comparing the five prototypes (II-VI) with VEGA, it was seen that the values of the ISQ and IT were not always higher, but there were two values of the ISQ that were statistically significantly higher with the 4.0 mm diameter Prototypes II (76.3 ± 6.1) and IV (78 ± 3.7). Prototype VII was the one with higher and significant values of the ISQ and IT. In both diameters and in both variables, all differences were statistically significant enough to achieve the higher values of primary stability values (IT and ISQ). Given the limitations of this study, it can be concluded that when there is an increase of the diameter of the implant and body taper, there is an increase of the ISQ and IT, showing that the diameter of the implant is an important criteria to obtain higher values of primary stability.
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Rakic M, Monje A, Radovanovic S, Petkovic‐Curcin A, Vojvodic D, Tatic Z. Is the personalized approach the key to improve clinical diagnosis of peri‐implant conditions? The role of bone markers. J Periodontol 2020; 91:859-869. [DOI: 10.1002/jper.19-0283] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2019] [Revised: 07/09/2019] [Accepted: 08/13/2019] [Indexed: 12/18/2022]
Affiliation(s)
- Mia Rakic
- Institute for Biological Research “Sinisa Stankovic”University of Belgrade Belgrade Serbia
- ETEP (Etiology and Therapy of Periodontal Diseases) Research GroupUniversity Complutense of Madrid Madrid Spain
| | - Alberto Monje
- Department of PeriodontologyUniversitat Internacional de Catalunya Barcelona Spain
| | - Sandro Radovanovic
- Faculty of Organizational SciencesUniversity of Belgrade Belgrade Serbia
| | | | - Danilo Vojvodic
- Institute for Medical ResearchMilitary Medical Academy Belgrade Serbia
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Dixon DR, London RM. Restorative design and associated risks for peri‐implant diseases. Periodontol 2000 2019; 81:167-178. [DOI: 10.1111/prd.12290] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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10
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Sakamoto E, Kido R, Tomotake Y, Naitou Y, Ishida Y, Kido JI. Calprotectin and cross-linked N-telopeptides of type I collagen levels in crevicular fluid from implant sites with peri-implant diseases: a pilot study. Int J Implant Dent 2018; 4:26. [PMID: 30209708 PMCID: PMC6135732 DOI: 10.1186/s40729-018-0138-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2017] [Accepted: 05/25/2018] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Peri-implant crevicular fluid (PICF) contains calprotectin and NTx, which are markers for inflammation and bone resorption, respectively. The aims of this pilot study were to compare calprotectin and NTx levels in PICF from implant sites with or without peri-implant diseases and to evaluate the usefulness of calprotectin and NTx as diagnostic markers for peri-implant diseases. METHODS Thirty-five patients with dental implants participated in this pilot study. PICF samples were collected from peri-implant disease sites (n = 40) and non-diseased (healthy) sites (n = 34) after clinical indicators including probing depth (PD), bleeding on probing (BOP), gingival index (GI), and bone loss (BL) rate were investigated. Calprotectin and NTx amounts in PICF were measured using their respective ELISA kits and then compared between diseased and healthy samples. The relationship between PICF calprotectin or NTx levels and clinical indicator levels was investigated. A receiver operating characteristic (ROC) curve analysis of calprotectin and NTx was performed to predict peri-implant diseases. RESULTS Calprotectin and NTx levels in PICF were significantly higher from peri-implant disease sites than from healthy sites. PICF calprotectin amounts correlated with PD, and its levels were significantly higher in the GI-1 and GI-2 groups than in the GI-0 group. PICF NTx amounts correlated with PD and the BL rate. ROC curves indicated that PICF calprotectin and NTx are useful biomarkers for peri-implant diseases. CONCLUSIONS Calprotectin and NTx in PICF have potential as biomarkers for the diagnosis of peri-implant diseases.
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Affiliation(s)
- Eijiro Sakamoto
- Department of Periodontology and Endodontology, Institute of Biomedical Sciences, Tokushima University Graduate School, 3-18-15 Kuramoto, Tokushima, 770-8504, Japan
| | - Rie Kido
- Department of Periodontology and Endodontology, Institute of Biomedical Sciences, Tokushima University Graduate School, 3-18-15 Kuramoto, Tokushima, 770-8504, Japan
| | - Yoritoki Tomotake
- Oral Implant Center, Tokushima University Hospital, Tokushima, Japan
| | - Yoshihito Naitou
- Oral Implant Center, Tokushima University Hospital, Tokushima, Japan
| | - Yuichi Ishida
- Department of Oral and Maxillofacial Prosthodontics, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima, Japan
| | - Jun-Ichi Kido
- Department of Periodontology and Endodontology, Institute of Biomedical Sciences, Tokushima University Graduate School, 3-18-15 Kuramoto, Tokushima, 770-8504, Japan.
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Rakic M, Galindo-Moreno P, Monje A, Radovanovic S, Wang HL, Cochran D, Sculean A, Canullo L. How frequent does peri-implantitis occur? A systematic review and meta-analysis. Clin Oral Investig 2017; 22:1805-1816. [DOI: 10.1007/s00784-017-2276-y] [Citation(s) in RCA: 80] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2017] [Accepted: 11/19/2017] [Indexed: 12/29/2022]
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Borba M, Deluiz D, Lourenço EJV, Oliveira L, Tannure PN. Risk factors for implant failure: a retrospective study in an educational institution using GEE analyses. Braz Oral Res 2017; 31:e69. [PMID: 28832716 DOI: 10.1590/1807-3107bor-2017.vol31.0069] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2016] [Accepted: 06/07/2017] [Indexed: 11/22/2022] Open
Abstract
This study aimed to evaluate dental implant outcomes and to identify risk factors associated with implant failure over 12 years via dental records of patients attending an educational institution. Dental records of 202 patients receiving 774 dental implants from 2002 to 2014 were analyzed by adopting a more reliable statistical method to evaluate risk factors with patients as the unit [generalized estimating equation (GEE)]. Information regarding patient age at implantation, sex, use of tobacco, and history of systemic diseases was collected. Information about implant location in the arch region and implant length, diameter, and placement in a grafted area was evaluated after 2 years under load. Systemic and local risk factors for early and late implant failure were studied. A total of 18 patients experienced 25 implant failures, resulting in an overall survival rate of 96.8% (2.84% and 0.38% early and late implant failures, respectively). The patient-based survival rate was 91.8%. GEE univariate and multivariate analyses revealed that a significant risk factor for implant failure was the maxillary implant (p = 0.006 and p = 0.014, respectively). Bone grafting appeared to be a risk factor for implant failure (p = 0.054). According to GEE analyses, maxillary implants had significantly worse outcomes in this population and were considered to be a risk factor for implant failure. Our results suggested that implants placed in a bone augmentation area had a tendency to fail.
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Affiliation(s)
- Marcelo Borba
- Universidade Veiga de Almeida - UVA, School of Dentistry, Rio de Janeiro, RJ, Brazil
| | - Daniel Deluiz
- Universidade Estadual do Rio de Janeiro - UERJ, School of Dentistry, Department of Periodontology, Rio de Janeiro, RJ, Brazil
| | | | - Luciano Oliveira
- Pontifícia Universidade Católica do Rio de Janerio - PUC-RJ, Department of Implantology, Rio de Janeiro, RJ, Brazil
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Gibreel M, Fouad M, El-Waseef F, El-Amier N, Marzook H. Clips vs Resilient Liners Used With Bilateral Posterior Prefabricated Bars for Retaining Four Implant-Supported Mandibular Overdentures. J ORAL IMPLANTOL 2017. [PMID: 28628356 DOI: 10.1563/aaid-joi-d-16-00148] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The objective of this research was to clinically compare peri-implant tissue health of bar-clips vs silicone-resilient liners used with bilateral posterior bars for retaining 4 implant-supported mandibular overdentures. Thirty completely edentulous male patients (mean age, 65 years) were randomly assigned into 2 equal groups. Each patient received 4 implants in the canine and first molar regions of the mandible using a flapless surgical technique. Mandibular overdentures were immediately connected to the implants with bilateral prefabricated instant adjusting bars. According to the method of retention to the bar, 1 group was retained with clips (GI), whereas the other group was retained with a silicone-resilient soft liner (GII). Peri-implant tissue health was evaluated clinically in terms of plaque scores (MPI), bleeding scores (MBI), probing depth (PD), and implant stability (IS). MPI, MBI, and PD were measured at mesial, distal, buccal, and lingual surfaces of each implant. Evaluations were performed 2 weeks (T0), 6 months (T6), and 12 months (T12) after overdenture insertion. Implants of GI with clips demonstrated significant increase in plaque, bleeding, and PD scores compared with those of GII with silicone-resilient liner at all observation times. Implants in GI demonstrated a significant decrease in implant stability compared with those of GII at T6 and T12 anteriorly and at T12 posteriorly. Resilient liners are considered better than bar-clips when used with bilateral posterior bars for retaining implant-supported mandibular overdentures in terms of peri-implant soft tissue health. Bilateral posterior ready-made bars cannot be proposed as a promising design for supporting implant-assisted mandibular overdentures.
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Affiliation(s)
- Mona Gibreel
- 1 Department of Prosthodontics, Faculty of Dentistry, Mansoura University, Mansoura, Egypt
| | - Mohammed Fouad
- 1 Department of Prosthodontics, Faculty of Dentistry, Mansoura University, Mansoura, Egypt
| | - Fatma El-Waseef
- 1 Department of Prosthodontics, Faculty of Dentistry, Mansoura University, Mansoura, Egypt
| | - Nesma El-Amier
- 1 Department of Prosthodontics, Faculty of Dentistry, Mansoura University, Mansoura, Egypt
| | - Hamdy Marzook
- 2 Department of Oral Surgery, Faculty of Dentistry, Mansoura University, Mansoura, Egypt
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Armitage GC, Xenoudi P. Post-treatment supportive care for the natural dentition and dental implants. Periodontol 2000 2016; 71:164-84. [DOI: 10.1111/prd.12122] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/09/2015] [Indexed: 12/11/2022]
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Alan R, Marakoğlu İ, Haliloğlu S. Peri-implant crevicular fluid levels of cathepsin-K, RANKL, and OPG around standard, short, and mini dental implants after prosthodontic loading. J Periodontal Implant Sci 2015; 45:169-77. [PMID: 26550525 PMCID: PMC4635438 DOI: 10.5051/jpis.2015.45.5.169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2015] [Accepted: 10/08/2015] [Indexed: 11/09/2022] Open
Abstract
Purpose Despite the high success rates of endosseous dental implants, their placement is restricted according to the height and volume of bone available. The use of short or mini dental implants could be one way to overcome this limitation. Thus, this study aimed to compare standard, short, and mini dental implants with regard to associated clinical parameters and peri-implant crevicular fluid (PICF) levels of cathepsin -K (CTSK), RANK ligand (RANKL), and osteoprotegerin (OPG), after prosthodontic loading. Methods A total of 78 non-submerged implants (Euroteknika, Aesthetica+2, Sallanches, France) were installed in 30 subjects (13 male, 17 female; range, 26-62 years) who visited the clinic of the Periodontology Department, Faculty of Dentistry, Selcuk University. Sampling and measurements were performed on the loading date (baseline) and 2, 14, and 90 days after loading. Assessment of the peri-implant status for the implant sites was performed using the pocket probing depth (PPD), modified plaque index, modified gingival index, modified sulcular bleeding index, and radiographic signs of bone loss. PICF samples collected from each implant were evaluated for CTSK, RANKL, and OPG levels using the ELISA method. Keratinized tissue and marginal bone loss (MBL) were also noted. Results Clinical parameters statistically significantly increased in each group but did not show statistical differences between groups without PPD. Although implant groups showed a higher MBL in the upper jaw, only the standard dental group demonstrated a statistically significant difference. At 90 days, the OPG: sRANKL ratio and total amounts of CTSK for each group did not differ from baseline. Conclusions Within the limitations of this study, both short and mini dental implants were achieving the same outcomes as the standard dental implants in the early period after loading.
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Affiliation(s)
- Raif Alan
- Department of Periodontology, Necmettin Erbakan University Faculty of Dentistry, Konya, Turkey
| | - İsmail Marakoğlu
- Department of Periodontology, Selcuk University Faculty of Dentistry, Konya, Turkey
| | - Seyfullah Haliloğlu
- Department of Biochemistry, Selcuk University Faculty of Dentistry, Konya, Turkey
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Rakic M, Struillou X, Petkovic-Curcin A, Matic S, Canullo L, Sanz M, Vojvodic D. Estimation of Bone Loss Biomarkers as a Diagnostic Tool for Peri-Implantitis. J Periodontol 2014; 85:1566-74. [DOI: 10.1902/jop.2014.140069] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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CD14 and TNFα single nucleotide polymorphisms are candidates for genetic biomarkers of peri-implantitis. Clin Oral Investig 2014; 19:791-801. [DOI: 10.1007/s00784-014-1313-3] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2013] [Accepted: 08/26/2014] [Indexed: 10/24/2022]
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Kim JH, Moon HJ, Kim TH, Jo JM, Yang SH, Naskar D, Kundu SC, Chrzanowski W, Kim HW. A novel in vivo platform for studying alveolar bone regeneration in rat. J Tissue Eng 2013; 4:2041731413517705. [PMID: 24555013 PMCID: PMC3927964 DOI: 10.1177/2041731413517705] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2011] [Accepted: 12/02/2013] [Indexed: 12/25/2022] Open
Abstract
Alveolar bone regeneration is a significant challenge in dental implantation. Novel biomaterials and tissue-engineered constructs are under extensive development and awaiting in vivo animal tests to find clinical endpoint. Here, we establish a novel in vivo model, modifying gingivoperiosteoplasty in rat for the alveolar bone regeneration. Rat premaxillary bone defects were filled with silk scaffold or remained empty during the implantation period (up to 6 weeks), and harvested samples were analyzed by micro-computed tomography and histopathology. Empty defects showed increased but limited new bone formation with increasing implantation period. In defects implanted with silk sponge, the bone formation was significantly greater than that of empty defect, indicating an effective role of silk scaffold in the defect model. The modified premaxillary defect model in rat is simple to perform, while mimicking the clinical conditions, finding usefulness for the development of biomaterials and tissue-engineered constructs targeting alveolar bone regeneration in dental implantation.
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Affiliation(s)
- Joong-Hyun Kim
- Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan, Republic of Korea ; Department of Nanobiomedical Science & BK21 PLUS NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan, Republic of Korea
| | - Ho-Jin Moon
- Department of Nanobiomedical Science & BK21 PLUS NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan, Republic of Korea ; Department of Conservative Dentistry, Dankook University Dental College, Cheonan, Republic of Korea
| | - Tae-Hyun Kim
- Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan, Republic of Korea ; Department of Nanobiomedical Science & BK21 PLUS NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan, Republic of Korea
| | - Jong-Min Jo
- Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan, Republic of Korea ; Department of Nanobiomedical Science & BK21 PLUS NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan, Republic of Korea
| | - Sung Hee Yang
- Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan, Republic of Korea ; Department of Nanobiomedical Science & BK21 PLUS NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan, Republic of Korea
| | - Deboki Naskar
- Department of Biotechnology, Indian Institute of Technology Kharagpur, Kharagpur, India
| | - Subhas C Kundu
- Department of Biotechnology, Indian Institute of Technology Kharagpur, Kharagpur, India
| | - Wojciech Chrzanowski
- Department of Nanobiomedical Science & BK21 PLUS NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan, Republic of Korea ; Faculty of Pharmacy, The University of Sydney, Sydney, NSW, Australia
| | - Hae-Won Kim
- Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan, Republic of Korea ; Department of Nanobiomedical Science & BK21 PLUS NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan, Republic of Korea ; Department of Biomaterials Science, Dankook University Dental College, Cheonan, Republic of Korea
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Chen S, Yang J, Wang H, Chao Y, Zhang C, Shen J, Zhang P. Adenovirus encoding BMP-7 immobilized on titanium surface exhibits local delivery ability and regulates osteoblast differentiation in vitro. Arch Oral Biol 2013; 58:1225-31. [DOI: 10.1016/j.archoralbio.2013.03.019] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2012] [Revised: 03/20/2013] [Accepted: 03/31/2013] [Indexed: 10/26/2022]
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Moeintaghavi A, Radvar M, Arab HR, Boostani HR, Ghiami E. Evaluation of 3- to 8-Year Treatment Outcomes and Success Rates With 6 Implant Brands in Partially Edentulous Patients. J ORAL IMPLANTOL 2012; 38:441-448. [DOI: 10.1563/aaid-joi-d-10-00117] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/30/2023]
Abstract
The use of osseointegrated implants as a foundation for the prosthetic replacement of missing teeth has become widespread, with new dental implant systems being introduced every year. There is growing interest in identifying the factors associated with implant failure, such as implant type. This study was designed to establish the relationship between implant type and success. Eighty-eight patients (mean age, 52 years) with 268 implants (110 BioHorizons, 60 ITI, 60 Paragon, 18 Xive, six 3i, and 19 Allfit) participated in this 5-year retrospective study. Statistical significance was defined for P < .05. Peri-implant probing depth was associated with bone loss and bleeding on probing. Implant failure was not associated with implant brand. Maximal (or minimal) peri-implant probing depth and bone loss values were seen at anterior regions (or premolars). Maximal (or minimal) bleeding on probing was seen at the posterior (or anterior) region. No significant differences were observed between the different systems in terms of implant failure.
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Affiliation(s)
- Amir Moeintaghavi
- Dental Research Center, School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Mehrdad Radvar
- Dental Research Center, School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Hamid Reza Arab
- Dental Research Center, School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Hamid Reza Boostani
- 2Department of Periodontics, School of Dentistry, Mashhad University of Medical Science, Mashhad, Iran
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Costa FO, Takenaka-Martinez S, Cota LOM, Ferreira SD, Silva GLM, Costa JE. Peri-implant disease in subjects with and without preventive maintenance: a 5-year follow-up. J Clin Periodontol 2011; 39:173-81. [DOI: 10.1111/j.1600-051x.2011.01819.x] [Citation(s) in RCA: 273] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/07/2011] [Indexed: 11/29/2022]
Affiliation(s)
- Fernando Oliveira Costa
- Department of Periodontology; School of Dentistry; Federal University of Minas Gerais; Belo Horizonte; Brazil
| | - Satoshi Takenaka-Martinez
- Department of Periodontology; School of Dentistry; Federal University of Minas Gerais; Belo Horizonte; Brazil
| | - Luís Otávio Miranda Cota
- Department of Periodontology; School of Dentistry; Federal University of Minas Gerais; Belo Horizonte; Brazil
| | - Sergio Diniz Ferreira
- Department of Periodontology; School of Dentistry; Federal University of Minas Gerais; Belo Horizonte; Brazil
| | | | - José Eustáquio Costa
- Department of Periodontology; School of Dentistry; Federal University of Minas Gerais; Belo Horizonte; Brazil
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Han X, Liu H, Wang D, Su F, Zhang Y, Zhou W, Li S, Yang R. Alveolar bone regeneration around immediate implants using an injectable nHAC/CSH loaded with autogenic blood-acquired mesenchymal progenitor cells: an experimental study in the dog mandible. Clin Implant Dent Relat Res 2011; 15:390-401. [PMID: 21745333 DOI: 10.1111/j.1708-8208.2011.00373.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
BACKGROUND Lack of osseointegration between a dental implant and the walls of the alveolar bone is a common problem in immediate implantation. Injectable tissue-engineered bone (ITB) may be an effective and minimally invasive solution to the problem. In this study, an injectable bone cement, nHAC/CSH, which consists of nano-hydroxyapatite/collagen (nHAC) and calcium sulfate hemihydrate (CaSO4 .½H2 O; CSH) was investigated as a tissue-engineered scaffold material with blood-acquired mesenchymal progenitor cells (BMPC) as seeding cells. PURPOSE The aim of the study was to assess the new bone formation around immediate dental implants using nHAC/CSH loaded with dog blood-acquired mesenchymal progenitor cells (dBMPC) in a canine model. MATERIALS AND METHODS dBMPC were first isolated from peripheral blood of healthy adult dogs. Alizarin red and oil red O staining were then used to evaluate the potential of dBMPC to differentiate into bi-lineage mesenchymal tissues in vitro. Four healthy mongrel dogs were used in this study. The alveolar bone defects around immediate implants of dogs were created. Each defect was randomly assigned to one of the following three groups: (1) the ITB group (dBMPC+nHAC/CSH); (2) injectable bone cement nHAC/CSH; or (3) no materials (controls). Methylene blue staining was used to examine the bone formation after 3 months. RESULTS Studies in vitro revealed that dBMPC could be induced to osteoblasts and adipocytes. The ITB group (dBMPC+nHAC/CSH) showed significantly more bone-implant contact and bone density than either nHAC/CSH or control groups in the areas with peri-implant defects 3 months after implantation. CONCLUSION The results indicate that the ITB composed of nHAC/CSH and dBMPC may represent a useful strategy for the clinical reconstruction of bone defects around immediate implantation. However, further investigation is needed involving the use of human BMPC as well as possible use of stem cells.
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Affiliation(s)
- Xue Han
- Dental Institute, Chinese PLA General Hospital, Beijing, China
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Sul YT, Jönsson J, Yoon GS, Johansson C. Resonance frequency measurements in vivoand related surface properties of magnesium-incorporated, micropatterned and magnesium-incorporated TiUnite ®, Osseotite ®, SLA ®and TiOblast ®implants. Clin Oral Implants Res 2009; 20:1146-1155. [DOI: 10.1111/j.1600-0501.2009.01767.x] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/30/2023]
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Ozkan Y, Ozcan M, Akoglu B, Ucankale M, Kulak-Ozkan Y. Three-year treatment outcomes with three brands of implants placed in the posterior maxilla and mandible of partially edentulous patients. J Prosthet Dent 2007; 97:78-84. [PMID: 17341375 DOI: 10.1016/j.prosdent.2007.01.004] [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: 11/28/2022]
Abstract
STATEMENT OF PROBLEM Survival rates of implants in posterior regions vary among clinical studies. Problems occur more often in the posterior segment of the maxilla due to proximity of the maxillary sinus and reduced quality or quantity of alveolar bone. PURPOSE This clinical study evaluated the treatment outcomes of 3 brands of implants in the posterior maxillae and mandibles of 63 patients. Treatment outcomes of all implants were assessed according to implant type, location, patient gender, periodontal status, and prosthesis type. MATERIAL AND METHODS A total of 203 implants-105 ITI (ITI), 53 Camlog (CAM), and 45 Frialit (FRI)-were placed in 63 patients (38 women, 25 men). One hundred twelve implants were located in the posterior mandible and 91 in the posterior maxilla. All implants were longer than 10 mm and had a diameter larger than 3.5 mm. Implants in the ITI group were placed in a 1-stage surgery. The CAM and FRI groups were treated with a 2-stage surgical protocol. Implants were not loaded until osseointegration was complete, which was determined clinically and radiographically. At that point, implants were restored with 50 single crowns and 81 fixed partial dentures (FPDs). While 11 FPDs connected implants to natural teeth, 70 FPDs were supported by implants only. Standardized radiographs were made, and clinical parameters were recorded at prosthesis insertion (baseline) and at each recall evaluation (6, 12, 24, and 36 months). Plaque index (PI), sulcus bleeding index (SBI), peri-implant probing depth (PD), and radiographic marginal bone loss (MBL) levels were recorded at baseline, along with any biological and mechanical complications. Repeated-measures ANOVA, Kruskal-Wallis test, Wilcoxon signed rank test, and paired samples tests were used for statistical analysis (alpha=.05). RESULTS One implant was lost during the osseointegration period in 1 woman due to infection. The cumulative implant treatment outcome was 99.3%. At the 3-year recall, plaque accumulation was significantly higher than baseline scores (P=.01, Wilcoxon signed rank test). Eight percent of the patients presented>2 mm PD at 2-year recall. The influence of observation time was found to be significant for the mean MBL values between groups (P=.001). When MBL values were compared between groups, no significant differences were found. For 1 patient in the FRI group, abutment loosening was observed and both the crown and the abutment were replaced. Patient satisfaction in all groups was high. CONCLUSION The 3 brands of implants evaluated in this study exhibited similar positive treatment outcomes after 3 years.
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Affiliation(s)
- Yasar Ozkan
- University of Marmara, Department of Oral Surgery, Istanbul, Turkey
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Ferreira SD, Silva GLM, Cortelli JR, Costa JE, Costa FO. Prevalence and risk variables for peri-implant disease in Brazilian subjects. J Clin Periodontol 2006; 33:929-35. [PMID: 17092244 DOI: 10.1111/j.1600-051x.2006.01001.x] [Citation(s) in RCA: 263] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
OBJECTIVES The aim of this study was to verify the prevalence of peri-implant disease and analyse possible risk variables associated with peri-implant mucositis and peri-implantitis. The study group consisted of 212 partially edentulous subjects rehabilitated with osseointegrated implants. MATERIAL AND METHODS The implants placed were examined clinically and radiographically to assess the peri-implant status. The degree of association between peri-implant disease and various independent variables was investigated using a multinomial regression analysis. RESULTS The prevalence of peri-implant mucositis and peri-implantitis were 64.6% and 8.9%, respectively. In univariate modelling, healthy peri-implant subjects presented lower plaque scores, less periodontal bleeding on probing, and less time elapsed since placement of supra-structures. In multivariate analyses, the risk variables associated with increased odds for having peri-implant disease included: gender, plaque scores, and periodontal bleeding on probing. Presence of periodontitis and diabetes were statistically associated with increased risk of peri-implantitis. The only two factors, which did not contribute to the presence of the disease, were the time elapsed since placement of supra-structures and the frequency of visits for maintenance care. CONCLUSION Our data suggest that subjects with periodontitis, diabetes, and poor oral hygiene were more prone to develop peri-implantitis.
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Affiliation(s)
- S D Ferreira
- Department of Periodontology, Federal University of Minas Gerais, Belo Horizonte, Brazil.
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Dunn CA, Jin Q, Taba M, Franceschi RT, Bruce Rutherford R, Giannobile WV. BMP gene delivery for alveolar bone engineering at dental implant defects. Mol Ther 2005; 11:294-9. [PMID: 15668141 PMCID: PMC2573463 DOI: 10.1016/j.ymthe.2004.10.005] [Citation(s) in RCA: 119] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2004] [Accepted: 09/27/2004] [Indexed: 11/23/2022] Open
Abstract
A challenge in the tissue engineering of alveolar bone surrounding oral or dental implants is achieving the targeted and sustained delivery of growth-promoting molecules at the osteotomy site. Bone morphogenetic protein-7 (BMP-7) has demonstrated the ability to stimulate bone regeneration in multiple skeletal sites, including the craniofacial complex. This study evaluates in vivo gene delivery of BMP-7 for bone tissue engineering around titanium dental implants. The maxillary first molar teeth of 44 Sprague-Dawley rats were extracted and allowed to heal for a period of 1 month. Large osteotomy defects were created in the edentulous ridge areas followed by the placement of dental implant fixtures. Recombinant adenoviral vectors encoding either the BMP-7 or the luciferase gene were delivered to the osseous defects using a collagen matrix. The kinetics of the gene expression was measured using in vivo bioluminescence optical imaging, while bone regeneration was evaluated under light and scanning electron microscopy. The results revealed sustained, targeted transgene expression for up to 10 days at the osteotomy sites with nearly undetectable levels by 35 days. Treatment of dental implant fixtures with Ad/BMP-7 resulted in enhancement of alveolar bone defect fill, coronal new bone formation, and new bone-to-implant contact. In vivo gene therapy of BMP-7 offers potential for alveolar bone engineering applications.
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Affiliation(s)
- Courtney A Dunn
- Department of Orthodontics and Pediatric Dentistry, University of Michigan, Ann Arbor, MI 48109, USA
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