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Casar-Espinosa JC, Castillo-Oyagüe R, Serrera-Figallo MÁ, Garrido-Serrano R, Lynch CD, Menéndez-Collar M, Torres-Lagares D, Gutiérrez-Pérez JL. Combination of straight and tilted implants for supporting screw-retained dental prostheses in atrophic posterior maxillae: A 2-year prospective study. J Dent 2017; 63:85-93. [PMID: 28587977 DOI: 10.1016/j.jdent.2017.05.022] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2017] [Revised: 05/13/2017] [Accepted: 05/30/2017] [Indexed: 11/28/2022] Open
Abstract
OBJECTIVES To evaluate the two-year survival rate (SR) and marginal bone loss (MBL) of fixed dental prostheses (FDPs) supported by straight (S) and tilted (T) implants under the influence of diverse study variables. METHODS A prospective investigation comprising 21 patients provided with a total of 27 maxillary screw-retained restorations fixed to 70 dental implants was developed. Two groups of implants were considered depending on their inclination with respect to the occlusal plane: Group 1 (S, n=37): straight/axial implants and Group 2 (T, n=33): tilted/angled fixations. Each FDP was supported by a combination of S and T implants. SR and MBL were assessed at the time of loading and two years after surgery. Patient-, surgical- and/or rehabilitation-related information was gathered. Data were statistically analysed at the α=0.05 significance level. RESULTS After 24 months, a 100% SR was achieved and the MBL of S and T implants were statistically similar. T implants located in the molar region showed lower MBL than did those replacing premolars (p=0.031). CONCLUSIONS Upright and angled fixations inserted at posterior maxillary areas resulted in comparable survival rates and peri-implant MBL after two years. The marginal bone resorption around tilted implants depended on their location. CLINICAL SIGNIFICANCE Screw-retained restorations fixed to straight and tilted implants seem to be a safe treatment option in posterior atrophic maxillae.
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Affiliation(s)
- Juan-Carlos Casar-Espinosa
- Department of Stomatology, Faculty of Dentistry, University of Seville (US), C/Avicena, s/n, 41009, Seville, Spain
| | - Raquel Castillo-Oyagüe
- Department of Buccofacial Prostheses, Faculty of Dentistry, Complutense University of Madrid (U.C.M.), Pza. Ramón y Cajal, s/n, 28040, Madrid, Spain.
| | | | - Roberto Garrido-Serrano
- Department of Stomatology, Faculty of Dentistry, University of Seville (US), C/Avicena, s/n, 41009, Seville, Spain
| | | | - Manuel Menéndez-Collar
- Department of Stomatology, Faculty of Dentistry, University of Seville (US), C/Avicena, s/n, 41009, Seville, Spain
| | - Daniel Torres-Lagares
- Department of Stomatology, Faculty of Dentistry, University of Seville (US), C/Avicena, s/n, 41009, Seville, Spain
| | - José-Luis Gutiérrez-Pérez
- Department of Stomatology, Faculty of Dentistry, University of Seville (US), C/Avicena, s/n, 41009, Seville, Spain
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Doornewaard R, Christiaens V, De Bruyn H, Jacobsson M, Cosyn J, Vervaeke S, Jacquet W. Long-Term Effect of Surface Roughness and Patients' Factors on Crestal Bone Loss at Dental Implants. A Systematic Review and Meta-Analysis. Clin Implant Dent Relat Res 2016; 19:372-399. [PMID: 27860171 DOI: 10.1111/cid.12457] [Citation(s) in RCA: 69] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Publications from 2011 to 2015 were selected to evaluate effect of implant surface roughness on long-term bone loss as surrogate for peri-implantitis risk. 87 out of 2,566 papers reported the mean bone loss after at least 5 years of function. Estimation of the proportion of implants with bone loss above 1, 2, and 3 mm as well as analysis the effect of implant surface roughness, smoking, and history of periodontitis was performed. By means of the provided statistical information of bone loss (mean and standard deviation) the prevalence of implants with bone loss ranging from 1 to 3 mm was estimated. The bone loss was used as a surrogate parameter for "peri-implantitis" given the fact that "peri-implantitis" prevalence was not reported in most studies or when reported, the diagnostic criteria were unclear or of dubious quality. The outcome of this review suggests that peri-implant bone loss around minimally rough implant systems was statistically significant less in comparison to the moderately rough and rough implant systems. No statistically significant difference was observed between moderately rough and rough implant systems. The studies that compared implants with comparable design and different surface roughness, showed less average peri-implant bone loss around the less rough surfaces in the meta-analysis. However, due to the heterogeneity of the papers and the multifactorial cause for bone loss, the impact of surface roughness alone seems rather limited and of minimal clinical importance. Irrespective of surface topography or implant brand, the average weighted implant survival rate was 97.3% after 5 years or more of loading. If considering 3 mm bone loss after at least 5 years to represent the presence of "peri-implantitis," less than 5% of the implants were affected. The meta-analysis indicated that periodontal history and smoking habits yielded more bone loss.
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Affiliation(s)
- Ron Doornewaard
- Specialist in training, Master student Periodontology, Department Periodontology & Oral Implantology, Dental School, Faculty Medicine and Health Sciences, Ghent University Belgium
| | - Véronique Christiaens
- PhD student, Department Periodontology & Oral Implantology, Dental School, Faculty Medicine and Health Sciences, Ghent University Belgium
| | - Hugo De Bruyn
- full professor and chairman, Department Periodontology & Oral Implantology, Dental School, Faculty Medicine and Health Sciences, Ghent University Belgium, visiting professor, Department of Prosthodontics, Malmö University, Sweden
| | - Magnus Jacobsson
- adjunct professor, Department of Prosthodontics, Malmö University, Sweden
| | - Jan Cosyn
- professor, Department Periodontology & Oral Implantology, Dental School, Faculty Medicine and Health Sciences, Ghent University Belgium, professor, Faculty of Medicine and Health Sciences, Oral Health Research Group ORHE, Faculty of Medicine and Pharmacy, Vrije Universiteit Brussel, Brussels, Belgium
| | - Stijn Vervaeke
- assistant professor, Department Periodontology & Oral Implantology, Dental School, Faculty Medicine and Health Sciences, Ghent University Belgium
| | - Wolfgang Jacquet
- professor, Faculty of Medicine and Pharmacy, Department of Educational Sciences EDWE-LOCI, Faculty of Psychology and Educational Sciences, Vrije Universiteit Brussel, Brussels, Belgium, professor, Faculty of Medicine and Health Sciences, Oral Health Research Group ORHE, Faculty of Medicine and Pharmacy, Vrije Universiteit Brussel, Brussels, Belgium
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Hasegawa M, Hotta Y, Hoshino T, Ito K, Komatsu S, Saito T. Long-term radiographic evaluation of risk factors related to implant treatment: suggestion for alternative statistical analysis of marginal bone loss. Clin Oral Implants Res 2015; 27:1283-1289. [DOI: 10.1111/clr.12734] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/08/2015] [Indexed: 11/29/2022]
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Tang CB, Liul SY, Zhou GX, Yu JH, Zhang GD, Bao YD, Wang QJ. Nonlinear finite element analysis of three implant- abutment interface designs. Int J Oral Sci 2012; 4:101-8. [PMID: 22699263 PMCID: PMC3412669 DOI: 10.1038/ijos.2012.35] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
The objective of this study was to investigate the mechanical characteristics of implant-abutment interface design in a dental , using nonlinear finite element analysis (FEA) method. This finite element simulation study was applied on three commonly used commercial dental implant systems: model I, the reduced-diameter 3i implant system (West Palm Beach, FL, USA) with a hex and a 12-point double internal hexagonal connection; model II, the Semados implant system (Bego, Bremen, Germany) with combination of a conical (450 taper) and internal hexagonal connection; and model III, the Brinemark implant system (Nobel Biocare, Gothenburg,Sweden) with external hexagonal connection. In simulation, a force of 170 N with 45" oblique to the longitudinal axis of the implant was loaded to the top surface of the abutment. It has been found from the strength and stiffness analysis that the 3i implant system has the lowest maximum von Mises stress, principal stress and displacement while the Br Bnemark implant system has the highest. It was concluded from our preliminary study using nonlinear FEA that the reduced-diameter 3i implant system with a hex and a 12-point double internal hexagonal connection had a better stress distribution, and produced a smaller displacement than the other two implant systems.
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Affiliation(s)
- Chun-Bo Tang
- Dental Research Institute, Nanjing Medical University, Nanjing, China .
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