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Carossa M, Pera F, Alovisi M, Ponzio M, Schierano G, Migliaretti G, Carossa S, Scotti N. Implant survival rate and marginal bone loss of 174 implants with different variables associated over a minimum observational period of 20 years: A retrospective study. J Prosthodont 2024. [PMID: 38517983 DOI: 10.1111/jopr.13848] [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: 08/29/2023] [Accepted: 03/07/2024] [Indexed: 03/24/2024] Open
Abstract
PURPOSE To investigate the long-term implant survival rate and marginal bone loss (MBL) of implants with different variables associated over an observational period of at least 20 years. MATERIALS AND METHODS Patients with at least one implant placed prior to 2001 were recalled and visited. Data on implant macro-design, prosthetic aspects, site distribution, and patient-related factors were collected. MBL was evaluated on intraoral X-rays and peri-implant soft tissue parameters were recorded. The patients were asked to fill out a questionnaire to evaluate their satisfaction with the treatment received. Descriptive statistics indicators were estimated. Analysis of variance and analysis of covariance models were used to investigate any differences in the MBL and peri-implant probing depth (PPD) among the variables. A chi-square analysis was performed to investigate any association between different types of prosthetic implant-supported rehabilitations and survival/success outcomes. RESULTS Forty-one (41) patients and 174 implants were included with a mean observational period of 23.3 ± 2.8 years. The implant survival and success rates were 96.5% and 83.3% respectively, while 3.5% of early failures were detected. The lowest success rates were observed for implants supporting fixed full-arch rehabilitations (71.05%) and overdenture rehabilitations (86.11%). A mean MBL of 1.81 ± 0.71 mm and a mean PPD of 3.38 ± 1.62 mm were recorded. The interaction between the collected data with MBL and PPD did not reveal any statistically significant differences between the variables (p > 0.05). A statistically significant difference was recorded when analyzing the association between the different types of prosthetic implant-supported rehabilitations and success rates (p = 0.014), with fixed and removable full-arch rehabilitations presenting with lower success rates. Answers to the questionnaire showed a generally high level of satisfaction. CONCLUSIONS Within the limits of this retrospective study and based on the results, an implant survival rate higher than 96% was observed after a mean observational period of 23.3 ± 2.8 years. Both the implant survival rate and MBL seemed stable after a mean observational period of 23.3 ± 2.8 years. Implants supporting fixed and removable full-arch rehabilitations seemed to present lower success rates over time. Implant rehabilitation seemed to provide patients with optimal long-term outcomes in terms of functional and psychological aspects.
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Affiliation(s)
- Massimo Carossa
- C.I.R. Dental School, Department of Surgical Sciences, University of Turin, Turin, Italy
| | - Francesco Pera
- C.I.R. Dental School, Department of Surgical Sciences, University of Turin, Turin, Italy
| | - Mario Alovisi
- C.I.R. Dental School, Department of Surgical Sciences, University of Turin, Turin, Italy
| | - Michele Ponzio
- C.I.R. Dental School, Department of Surgical Sciences, University of Turin, Turin, Italy
| | - Gianmario Schierano
- C.I.R. Dental School, Department of Surgical Sciences, University of Turin, Turin, Italy
| | - Giuseppe Migliaretti
- Department of Public Health and Pediatric Sciences, University of Turin, Turin, Italy
| | - Stefano Carossa
- C.I.R. Dental School, Department of Surgical Sciences, University of Turin, Turin, Italy
| | - Nicola Scotti
- C.I.R. Dental School, Department of Surgical Sciences, University of Turin, Turin, Italy
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Pera F, Pesce P, Menini M, Fanelli F, Kim BC, Zhurakivska K, Mayer Y, Isola G, Cianciotta G, Crupi A, Ambrogio G, Scotti N, Carossa M. Immediate loading full-arch rehabilitation using transmucosal tissue-level implants with different variables associated: a one-year observational study. Minerva Dent Oral Sci 2023; 72:230-238. [PMID: 37194244 DOI: 10.23736/s2724-6329.23.04782-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
BACKGROUND The aim of the present observational study was to investigate the application of transmucosal tissue-level implants in immediate loading full-arch rehabilitation with different variables associated. METHODS Patients needing a full-arch implant rehabilitation were recruited and rehabilitated with four transmucosal tissue level implants. Data related to implants' diameters and lengths, jaw distributions, and presence of angulated abutments were collected. The following outcomes were evaluated: survival rate, marginal bone loss (MBL), Plaque Index (PI), bleeding on probing (BoP), probing depth (PD). Descriptive statistical analysis was reported and univariate linear regression models were built to assess a significant correlation between MBL and the different implant related factors. RESULTS Twenty patients were rehabilitated for a total implant number of 80; 11 rehabilitations were performed on the maxilla, while 9 were performed on the mandible; 48 implants presented a 3.8 mm diameter and 32 implants presented a 4.25 mm diameter. Implants length varied between 10 to 15 mm; 40 tilted implants were connected to angulated abutment, while 40 straight implants were connected directly to the prostheses (no abutments). At the one year follow-up visit no implants failed resulting in an implant survival rate of 100%. The overall MBL was 1.19±0.30 mm. No statistically significant difference (P>0.05) was highlighted among any of the subgroups analyzed. CONCLUSIONS Despite different variables associated, tissue level implants seem to represent a valid option when applied in immediate loading full-arch rehabilitation. Further research and longer observational periods are encouraged to confirm the result.
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Affiliation(s)
- Francesco Pera
- C.I.R. Dental School, Department of Surgical Sciences, University of Turin, Turin, Italy
| | - Paolo Pesce
- Department of Surgical Sciences (DISC), University of Genoa, Genoa, Italy
| | - Maria Menini
- Department of Surgical Sciences (DISC), University of Genoa, Genoa, Italy
| | - Francesco Fanelli
- Department of Clinical and Experimental Medicine, University of Foggia, Foggia, Italy
| | - Byung-Chan Kim
- Department of Clinical and Experimental Medicine, University of Foggia, Foggia, Italy
| | - Khrystyna Zhurakivska
- Department of Clinical and Experimental Medicine, University of Foggia, Foggia, Italy
| | - Yaniv Mayer
- School of Graduate Dentistry, Health Care Campus Rambam, Haifa, Israel
| | - Gaetano Isola
- School of Dentistry, Department of General Surgery and Surgical-Medical Specialties, University of Catania, Catania, Italy
| | - Giulia Cianciotta
- C.I.R. Dental School, Department of Surgical Sciences, University of Turin, Turin, Italy
| | - Armando Crupi
- C.I.R. Dental School, Department of Surgical Sciences, University of Turin, Turin, Italy
| | - Giulia Ambrogio
- C.I.R. Dental School, Department of Surgical Sciences, University of Turin, Turin, Italy
| | - Nicola Scotti
- C.I.R. Dental School, Department of Surgical Sciences, University of Turin, Turin, Italy
| | - Massimo Carossa
- C.I.R. Dental School, Department of Surgical Sciences, University of Turin, Turin, Italy -
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Simionato AA, Santos EDS, Faria ACL, do Nascimento C, Rodrigues RCS, Ribeiro RF. Bacterial Detection, Deformation, and Torque Loss on Dental Implants with Different Tapered Connections Compared with External Hexagon Connection after Thermomechanical Cycling. MATERIALS (BASEL, SWITZERLAND) 2023; 16:ma16113904. [PMID: 37297037 DOI: 10.3390/ma16113904] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2023] [Revised: 05/19/2023] [Accepted: 05/21/2023] [Indexed: 06/12/2023]
Abstract
The relationship between bacterial infiltration and internal conical Implant-Abutment Interfaces (IAIs) with different conicities still requires investigations that can offer valuable information in the clinical understanding of peri-implant health. The present study aimed to verify the bacterial infiltration of two internal conical connections with an angulation of 11.5° and 16° with the external hexagonal connection as a comparative after thermomechanical cycling using saliva as a contaminant. Test (n = 10) and control (n = 3) groups were set up. Evaluations were made on torque loss, Scanning Electron Microscopy (SEM), and Micro Computerized Tomography (MicroCT) after performing 2 × 106 mechanical cycles (120 N) and 600 thermal cycles (5°-55° C) with 2 mm lateral displacement. The contents of the IAI were collected for microbiological analysis. There was a difference (p < 0.05) in torque loss of the groups tested; groups from the 16° IAI obtained a lower percentage of torque loss. All groups presented contamination and the analysis of the results shows that the microbiological profile of the IAI differs qualitatively from the profile found in the saliva used for contamination. The mechanical loading affects the microbiological profile found in the IAIs (p < 0.05). In conclusion, the IAI environment may favor a microbiological profile different from that of saliva and the thermocycling condition may alter the microbial profile found in the IAI.
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Affiliation(s)
- Anselmo Agostinho Simionato
- Department of Dental Materials and Prosthodontics, School of Dentistry of Ribeirao Preto, University of São Paulo, Ribeirao Preto 14040-904, Brazil
| | - Emerson de Souza Santos
- Department of Clinical Analysis, Toxicology, and Food Science, School of Pharmaceutical Sciences of Ribeirao Preto, University of São Paulo, Ribeirao Preto 14040-903, Brazil
| | - Adriana Cláudia Lapria Faria
- Department of Dental Materials and Prosthodontics, School of Dentistry of Ribeirao Preto, University of São Paulo, Ribeirao Preto 14040-904, Brazil
| | - Cássio do Nascimento
- Department of Dental Materials and Prosthodontics, School of Dentistry of Ribeirao Preto, University of São Paulo, Ribeirao Preto 14040-904, Brazil
| | - Renata Cristina Silveira Rodrigues
- Department of Dental Materials and Prosthodontics, School of Dentistry of Ribeirao Preto, University of São Paulo, Ribeirao Preto 14040-904, Brazil
| | - Ricardo Faria Ribeiro
- Department of Dental Materials and Prosthodontics, School of Dentistry of Ribeirao Preto, University of São Paulo, Ribeirao Preto 14040-904, Brazil
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Fuda S, Martins BGDS, Castro FCD, Heboyan A, Gehrke SA, Fernandes JCH, Mello-Moura ACV, Fernandes GVO. Marginal Bone Level and Clinical Parameter Analysis Comparing External Hexagon and Morse Taper Implants: A Systematic Review and Meta-Analysis. Diagnostics (Basel) 2023; 13:diagnostics13091587. [PMID: 37174979 PMCID: PMC10178059 DOI: 10.3390/diagnostics13091587] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Revised: 04/18/2023] [Accepted: 04/25/2023] [Indexed: 05/15/2023] Open
Abstract
The goal of this systematic review was to verify the marginal bone loss (MBL) and other clinical parameters comparing external hexagon (EH) and Morse taper (MT) implants when they were evaluated within the same study. The focused question was, "For patients (P) treated with external connection (I) or Morse taper (C) dental implants, were there differences in the marginal bone crest maintenance after at least three months in occlusal function (O)"? As for the inclusion criteria that were considered, they included clinical studies in English that compared the MBL in implants with EH and MT, with follow-up of at least three months, that were published between 2011 and 2022; as for the exclusion criteria, they included publications investigating only one type of connection that analyzed other variables and did not report results for the MBL, reports based on questionnaires, interviews, and case reports/series, systematic reviews, or studies involving patients with a significant health problem (ASA Physical Status 3 and above). The PubMed/MEDLINE, Embase, and Web of Science databases were screened, and all of the data obtained were registered in a spreadsheet (Excel®). The Jadad scale was used to assess the quality of the studies. A total of 110 articles were initially identified; 11 were considered for full-text reading. Then, six articles (four RCTs and two prospective studies) met the eligibility criteria and were included in this study. A total of 185 patients (mean age of 59.71) were observed, and the follow-up ranged from 3 months to 36 months. A total of 541 implants were registered (267 EH and 274 MT). The survival rate ranged between 96% and 100% (the average was 97.82%). The MBL was compared among all periods studied; therefore, the common assessment period was the 12-month follow-up, presenting greater MBL for EH than for MT (p < 0.001). A mean MBL of 0.60 mm (95% CI 0.43-0.78) was found after the same period. BoP was reported in 5 studies and plaque index was reported in 4 (2 with more than 30%). Deep PD was observed in three studies. High heterogeneity was observed (I2 = 85.06%). Thus, within the limitation of this review, it was possible to conclude that there is higher bone loss in EH than in MT implants when evaluating and comparing this variable within the same study. However, the results must be carefully interpreted because of this review's limited number of clinical studies, the short assessment period, and the high heterogeneity found.
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Affiliation(s)
- Samuele Fuda
- Faculty of Dental Medicine, Universidade Católica Portuguesa, 3504-505 Viseu, Portugal
| | | | | | - Artak Heboyan
- Department of Prosthodontics, Faculty of Stomatology, Yerevan State Medical University after Mkhitar Heratsi, Str. Koryun 2, Yerevan 0025, Armenia
| | - Sergio Alexandre Gehrke
- Department of Research, Bioface/PgO/UCAM, Calle Cuareim 1483, Montevideo 11100, Uruguay
- Instituto de Bioingenieria, Universidad Miguel Hernández, 03202 Elche, Spain
- Department of Biotechnology, Universidad Católica de Murcia (UCAM), 30107 Murcia, Spain
| | | | - Anna Carolina Volpi Mello-Moura
- Faculty of Dental Medicine, Universidade Católica Portuguesa, 3504-505 Viseu, Portugal
- Centre for Interdisciplinary Research in Health (CIIS), Universidade Católica Portuguesa, 3504-505 Viseu, Portugal
| | - Gustavo Vicentis Oliveira Fernandes
- Periodontics and Oral Medicine Department, University of Michigan School of Dentistry, Ann Arbor, MI 48109, USA
- Centre for Interdisciplinary Research in Health (CIIS), Universidade Católica Portuguesa, 3504-505 Viseu, Portugal
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Butera A, Scribante A. A Retrospect of the Special Issue “Advances in Oral Implant Health”. Dent J (Basel) 2023; 11:dj11040093. [PMID: 37185471 PMCID: PMC10137526 DOI: 10.3390/dj11040093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Accepted: 03/28/2023] [Indexed: 04/03/2023] Open
Abstract
Research on modern dental implantology focuses on the development of increasingly more advanced techniques with the aim of improving the reliability of dental implants while reducing patient morbidity [...]
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Mendes TA, Vilhena L, Portugal J, Caramês J, Ramalho AL, Lopes LP. Wear of Titanium Implant Platforms with Different Abutment Connections and Abutment Materials: A Pilot Study. J Funct Biomater 2023; 14:jfb14040178. [PMID: 37103268 PMCID: PMC10146395 DOI: 10.3390/jfb14040178] [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: 02/15/2023] [Revised: 03/21/2023] [Accepted: 03/22/2023] [Indexed: 04/28/2023] Open
Abstract
The most commonly used material in dental implants and their abutments is titanium. Zirconia is a more aesthetic alternative to titanium abutments; however, it is much harder. There are concerns that zirconia could damage the surface of the implant over time, especially in less stable connections. The aim was to evaluate the wear of implants with different platforms connected to titanium and zirconia abutments. A total of six implants were evaluated, two of each connection type: external hexagon, tri-channel, and conical connections (n = 2). Half of the implants were connected to zirconia abutments, and the other half to titanium abutments (n = 3). The implants were then cyclically loaded. The implant platforms were evaluated by digital superimposing micro CT files and calculating the area of the loss surface (wear). In all the implants, a statistically significant loss of the surface area (p = 0.028) was observed when comparing the area before and after cyclic loading. The average lost surface area was 0.38 mm2 with titanium abutments and 0.41 mm2 with zirconia abutments. The average lost surface area was 0.41 mm2 with the external hexagon, 0.38 mm2 with the tri-channel, and 0.40 mm2 with the conical connection. In conclusion, the cyclic loads induced implant wear. However, neither the type of abutment (p = 0.700) nor the connection (p = 0.718) influenced the amount of surface area lost.
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Affiliation(s)
- Teresa A Mendes
- Faculdade de Medicina Dentária, Universidade de Lisboa, 1600-277 Lisbon, Portugal
| | - Luis Vilhena
- Department of Mechanical Engineering, Centre for Mechanical Engineering, Materials and Processes (CEMMPRE), University of Coimbra, 3004-516 Coimbra, Portugal
| | - Jaime Portugal
- Faculdade de Medicina Dentária, Universidade de Lisboa, 1600-277 Lisbon, Portugal
| | - João Caramês
- Faculdade de Medicina Dentária, Universidade de Lisboa, 1600-277 Lisbon, Portugal
- Laboratório de Instrumentação, Engenharia Biomédica e Física da Radiação (LIBPhys), 1600-277 Lisbon, Portugal
| | - Amilcar L Ramalho
- Department of Mechanical Engineering, Centre for Mechanical Engineering, Materials and Processes (CEMMPRE), University of Coimbra, 3004-516 Coimbra, Portugal
| | - Luis P Lopes
- Faculdade de Medicina Dentária, Universidade de Lisboa, 1600-277 Lisbon, Portugal
- Laboratório de Instrumentação, Engenharia Biomédica e Física da Radiação (LIBPhys), 1600-277 Lisbon, Portugal
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Oh JH, Pyo SW, Chang JS, Kim S. Up to a 15-Year Survival Rate and Marginal Bone Resorption of 1780 Implants with or without Microthreads: A Multi Center Retrospective Study. J Clin Med 2023; 12:jcm12062425. [PMID: 36983425 PMCID: PMC10057595 DOI: 10.3390/jcm12062425] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Revised: 03/12/2023] [Accepted: 03/20/2023] [Indexed: 03/30/2023] Open
Abstract
The effect of microthreads at the implant neck on the amount of marginal bone resorption is controversial. This multicenter retrospective study compared the implant survival rate and amount of marginal bone resorption between two platform-switching internal connection implant systems with or without microthreads. Patient-related (age and sex), surgery-related (implant installation site, type, diameter, and length), and prosthesis-related (prosthesis type) data were collected from patient charts from the implant placement surgery to the final recall visit. A total of 1780 implants, including 1379 with microthreads and 401 without microthreads, were placed in 804 patients. For implants with and without microthreads, the longest follow-up period after prosthesis delivery was 15 and 6 years, respectively. Twenty implants failed during the 15-year follow-up period (98.8% survival rate) due to failed osseointegration, peri-implantitis, implant fractures, and non-functioning implants. The mean marginal bone loss was < 0.1 mm for both implant systems at the 1-year follow-up and 0.18 mm and 0.09 mm at the 4-year follow-up for implants with and without microthreads, respectively, without statistical significance. Microthreads did not significantly affect the amount of marginal bone loss or the implant survival rate for implants with an internal connection with a platform-switching design.
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Affiliation(s)
- Ji-Hwan Oh
- Graduate School, College of Dentistry, Yonsei University, Seoul 03722, Republic of Korea
| | - Se-Wook Pyo
- Department of Prosthodontics, Gangnam Severance Dental Hospital, College of Dentistry, Yonsei University, Seoul 06273, Republic of Korea
| | - Jae-Seung Chang
- Department of Prosthodontics, Gangnam Severance Dental Hospital, College of Dentistry, Yonsei University, Seoul 06273, Republic of Korea
| | - Sunjai Kim
- Department of Prosthodontics, Gangnam Severance Dental Hospital, College of Dentistry, Yonsei University, Seoul 06273, Republic of Korea
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Kohal RJ, Burkhardt F, Chevalier J, Patzelt SBM, Butz F. One-Piece Zirconia Oral Implants for Single Tooth Replacement: Five-Year Results from a Prospective Cohort Study. J Funct Biomater 2023; 14:jfb14020116. [PMID: 36826915 PMCID: PMC9964460 DOI: 10.3390/jfb14020116] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Revised: 02/06/2023] [Accepted: 02/15/2023] [Indexed: 02/22/2023] Open
Abstract
The intention of this 5-year prospective cohort investigation was to clinically and radiographically investigate the outcomes of a one-piece zirconia implant system for single tooth replacement. Sixty-five patients received a total of 66 single-tooth implants. All implants immediately received temporary restorations and were finally restored with all-ceramic crowns. Follow-ups were performed at the prosthetic delivery, after 1, 3, and 5 years. Peri-implant and dental soft-tissue parameters were evaluated and patient-reported outcomes recorded. To monitor peri-implant bone remodelling, standardised radiographs were taken at the implant insertion and at the 1-, 3-, and 5-year follow-ups. In the course of 5 years, 14 implants were lost, resulting in a cumulative implant survival rate of 78.2%. The mean marginal bone loss from the implant insertion to the 5-year follow-up amounted to 1.12 mm. Probing depth, clinical attachment level, bleeding, and plaque index increased over time. In 91.5% of the implants, the papilla index showed levels of 1 or 2, respectively. At the end of the study, the patient satisfaction was higher compared to the pre-treatment measurements. Due to the low survival rate after five years and the noticeably high frequency of advanced bone loss observed in this study, the implant has not met the launch criteria, as it would have not been recommended for routine clinical use.
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Affiliation(s)
- Ralf-Joachim Kohal
- Department of Prosthetic Dentistry, Center for Dental Medicine, Medical Center—University of Freiburg, Faculty of Medicine, University of Freiburg, Hugstetter Str. 55, 79106 Freiburg, Germany
| | - Felix Burkhardt
- Department of Prosthetic Dentistry, Center for Dental Medicine, Medical Center—University of Freiburg, Faculty of Medicine, University of Freiburg, Hugstetter Str. 55, 79106 Freiburg, Germany
| | - Jerome Chevalier
- INSA-Lyon, MATEIS Laboratory, University of Lyon, UMR CNRS 5510, 20 Avenue Albert Einstein, CEDEX, 69621 Villeurbanne, France
| | - Sebastian Berthold Maximilian Patzelt
- Department of Prosthetic Dentistry, Center for Dental Medicine, Medical Center—University of Freiburg, Faculty of Medicine, University of Freiburg, Hugstetter Str. 55, 79106 Freiburg, Germany
- Private Dental Clinic, Am Dorfplatz 3, 78658 Zimmern ob Rottweil, Germany
| | - Frank Butz
- Department of Prosthetic Dentistry, Center for Dental Medicine, Medical Center—University of Freiburg, Faculty of Medicine, University of Freiburg, Hugstetter Str. 55, 79106 Freiburg, Germany
- Private Dental Clinic, Belchenstrasse 6a, 79189 Bad Krozingen, Germany
- Correspondence:
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Pera F, Menini M, Alovisi M, Crupi A, Ambrogio G, Asero S, Marchetti C, Canepa C, Merlini L, Pesce P, Carossa M. Can Abutment with Novel Superlattice CrN/NbN Coatings Influence Peri-Implant Tissue Health and Implant Survival Rate Compared to Machined Abutment? 6-Month Results from a Multi-Center Split-Mouth Randomized Control Trial. MATERIALS (BASEL, SWITZERLAND) 2022; 16:ma16010246. [PMID: 36614586 PMCID: PMC9821948 DOI: 10.3390/ma16010246] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Revised: 12/12/2022] [Accepted: 12/23/2022] [Indexed: 05/12/2023]
Abstract
Background: The aim of the present multi-center split-mouth randomized control trial was to investigate the effect on peri-implant tissue of abutment with chromium nitride/ niobium nitride (CrN/NbN) coatings (superlattice) compared to traditional machined surface. Methods: Two adjacent posterior implants were inserted in 20 patients. A machined abutment was randomly screwed on either the mesial or distal implant, while a superlattice abutment was screwed on the other one. Implant survival rate, peri-implant probing depth (PPD), plaque index (PI), and bleeding index (BI) were collected 6 months after surgery, while marginal bone loss (MBL) was evaluated at T0 and T6.; Results: Implant survival rate was 97.7%. A total MBL of 0.77 ± 0.50 mm was recorded for superlattice abutments, while a mean MBL of 0.79 ± 0.40 mm was recorded for the abutment with machined surface. A mean PPD of 1.3 ± 0.23 mm was recorded for the superlattice Group, and a mean PPD of 1.31 ± 0.3 was recorded for the machined surface Group. PI was of 0.55 ± 0.51 for superlattice Group and 0.57 ± 0.50 for machined Group, while BI was of 0.47 ± 0.49 for superlattice Group and of 0.46 ± 0.40 for the machined one. No statistically significant difference was highlighted between the two Groups (p > 0.05). Conclusions: After a 6-month observational period, no statistically significant differences were highlighted between superlattice abutment and traditional machined abutment. Further in vitro studies as well as clinical research with longer follow-ups are required to better investigate the surface properties of the novel abutments’ superlattice coating and its effect on the oral tissues.
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Affiliation(s)
- Francesco Pera
- Department of Surgical Sciences, C.I.R. Dental School, University of Turin, 10126 Turin, Italy
| | - Maria Menini
- Department of Surgical Sciences (DISC), University of Genoa, 16132 Genoa, Italy
| | - Mario Alovisi
- Department of Surgical Sciences, C.I.R. Dental School, University of Turin, 10126 Turin, Italy
| | - Armando Crupi
- Department of Surgical Sciences, C.I.R. Dental School, University of Turin, 10126 Turin, Italy
| | - Giulia Ambrogio
- Department of Surgical Sciences, C.I.R. Dental School, University of Turin, 10126 Turin, Italy
| | - Sofia Asero
- Department of Surgical Sciences, C.I.R. Dental School, University of Turin, 10126 Turin, Italy
| | - Carlotta Marchetti
- Department of Surgical Sciences (DISC), University of Genoa, 16132 Genoa, Italy
| | - Camilla Canepa
- Department of Surgical Sciences (DISC), University of Genoa, 16132 Genoa, Italy
| | - Laura Merlini
- Department of Surgical Sciences (DISC), University of Genoa, 16132 Genoa, Italy
| | - Paolo Pesce
- Department of Surgical Sciences (DISC), University of Genoa, 16132 Genoa, Italy
| | - Massimo Carossa
- Department of Surgical Sciences, C.I.R. Dental School, University of Turin, 10126 Turin, Italy
- Correspondence:
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Anitua E, Larrazabal Saez de Ibarra N, Saracho Rotaeche L. Implant-Supported Prostheses in the Edentulous Mandible: Biomechanical Analysis of Different Implant Configurations via Finite Element Analysis. Dent J (Basel) 2022; 11:dj11010004. [PMID: 36661541 PMCID: PMC9858073 DOI: 10.3390/dj11010004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2022] [Revised: 12/15/2022] [Accepted: 12/16/2022] [Indexed: 12/28/2022] Open
Abstract
This study explores the implant-supported prosthetic treatment alternatives of the edentulous mandible from a biomechanical point of view by means of a Finite Element Analysis (FEA). Finite element (FE) models were used to simulate cases treated with six, five, and four, implants and a fixed prosthesis with a cantilever. In the four implant treatments, three cases were analyzed; the posterior implants were placed in axial positions, angled at 30° and 45°. Cases with six and four axially placed implants were also analyzed by placing the posterior implants distally to the foramen, thus eliminating the cantilever in the prostheses. In the cases with implants between foramina, the highest values for the principal strains and von Mises stresses were observed in the case with four implants where the posterior implants were angled at 45°. Cases with implants placed distally to the foramen and without a cantilever showed much lower bone stress and strain levels compared to cases with implants between foramina. From a biomechanical point of view, it seems to be a better option to use implants positioned distally to the foramen, eliminating cantilevers.
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Grande F, Pozzan MC, Marconato R, Mollica F, Catapano S. Evaluation of Load Distribution in a Mandibular Model with Four Implants Depending on the Number of Prosthetic Screws Used for OT-Bridge System: A Finite Element Analysis (FEA). MATERIALS (BASEL, SWITZERLAND) 2022; 15:ma15227963. [PMID: 36431449 PMCID: PMC9699052 DOI: 10.3390/ma15227963] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Revised: 11/09/2022] [Accepted: 11/09/2022] [Indexed: 05/28/2023]
Abstract
In full-arch implant rehabilitations, when the anterior screw abutment channel compromises the aesthetic of the patient, the OT-Bridge system used with its Seeger rings may provide the necessary retention of the prosthesis. However, no studies have evaluated the forces generated at the Seeger level during loading. This Finite Element Analysis aims to investigate the mechanical behavior of Seeger rings in a mandibular model with four implants and an OT-Bridge system, used without one or two anterior prosthetic screws. A 400 N unilateral load was virtually applied on a 7 mm distal cantilever. Two different variables were considered: the constraint conditions using two or three screws instead of four and the three different framework materials (fiberglass reinforced resin, cobalt-chrome, TiAl6V4). The FEA analysis exhibited tensile and compressive forces on the Seeger closest to the loading point. With the resin framework, a tension force on abutment 3.3 generates a displacement from 5 to 10 times greater than that respectively expressed in metal framework materials. In a full-arch rehabilitation with four implants, the case with three prosthetic screws seems to be a safer and more predictable configuration instead of two. Considering the stress value exhibited and the mechanical properties of the Seeger, the presence of only two prosthetic screws could lead to permanent deformation of the Seeger in the screwless abutment closest to the loading point.
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Affiliation(s)
- Francesco Grande
- Department of Prosthodontics, University of Ferrara, Via Luigi Borsari 46, 44121 Ferrara, Italy
- Department of Mechanical and Aerospace Engineering, Politecnico di Torino, Via Nizza, 230, 10126 Torino, Italy
| | - Mario Cesare Pozzan
- Department of Prosthodontics, University of Ferrara, Via Luigi Borsari 46, 44121 Ferrara, Italy
| | - Raul Marconato
- Department of Prosthodontics, University of Ferrara, Via Luigi Borsari 46, 44121 Ferrara, Italy
| | - Francesco Mollica
- Department of Engineering, University of Ferrara, 44121 Ferrara, Italy
| | - Santo Catapano
- Department of Prosthodontics, University of Ferrara, Via Luigi Borsari 46, 44121 Ferrara, Italy
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Clinical Outcomes of Dental Implants with Two Different Internal Connection Configurations—A RCT. PROSTHESIS 2022. [DOI: 10.3390/prosthesis4040046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Background: The aim of the present study was to highlight clinical and radiographical differences among implants sharing the same macro-geometry but with two different prosthodontic connections. Methods: Patients requiring at least 2 implants in the posterior area of the jaw were randomly divided into two groups (Conical (CS) and Internal Hexagonal (IH) connection). At implant surgery (T0), insertion torque, implant stability quotient (ISQ values recorded by resonance frequency analysis, RFA), and soft tissue thickness (STH) were assessed. A 1-abutment/1-time protocol was applied, and the prosthesis was realized following a fully digital workflow. At the 36-month follow-up periapical x-rays were taken. In order to statistically analyse differences among the two groups and the different variables, paired T-test was used. Linear regression analysis was conducted to analyze how marginal bone loss (MBL) was affected by other independent variables. A neural network created to predict the success (good or not good) of the implant itself was implemented. Results: 30 out of 33 patients (14 males, 16 females, mean age: 68.94 ± 13.01 years) (32 CS and 32 IH) were analyzed. No implants failed. Marginal bone loss at the 3-year time-point was 0.33 ± 0.34 mm and 0.43 ± 0.37 mm respectively for CS and IH with a significant difference between the two groups (p = 0.004). The presence of keratinized gingiva (p = 0.034) significantly influenced MBL. Conclusions: Both the implant connections investigated presented optimal clinical outcomes with minimal marginal bone loss; however, CS implants and implants with the presence of a greater width of keratinized tissue presented significantly lower MBL.
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Halim FC, Pesce P, De Angelis N, Benedicenti S, Menini M. Comparison of the Clinical Outcomes of Titanium and Zirconia Implant Abutments: A Systematic Review of Systematic Reviews. J Clin Med 2022; 11:jcm11175052. [PMID: 36078982 PMCID: PMC9456707 DOI: 10.3390/jcm11175052] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Revised: 08/25/2022] [Accepted: 08/26/2022] [Indexed: 01/07/2023] Open
Abstract
Background: Dental implants are widely used and in order to answer to esthetic demands, zirconia has been introduced as an abutment material as an alternative to titanium. Several studies have been published on this topic, but the results have been often inconsistent. The objective of the present study is to systematically analyze the existing literature comparing clinical outcomes of titanium and zirconia implant abutments. The study was designed as a systematic review of systematic reviews. Methods: This systematic review is in accordance with the Transparent Reporting of Systematic Reviews and Meta-analyses. A MEDLINE/PubMed, Cochrane Database of Systematic Reviews and SCOPUS literature search was performed up to and including June 2021. Data were extracted independently by two reviewers and tAMSTAR2 was used to assess the quality of the systematic reviews. Results: The electronic search identified 1146 papers, and 175 duplicates were removed. After manual screening, 954 studies were excluded and the final analysis was conducted on 11 papers. Both mechanical and esthetic outcomes and biological complications were analyzed. Conclusions: It can be concluded that titanium abutments have a better mechanical resistance than zirconia ones. Plaque accumulation is reported to be slightly higher on titanium but without any significant inflammatory process. The esthetic outcomes seem to be more related to the thickness (>3 mm) of the soft tissues than to the abutment material.
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Affiliation(s)
| | - Paolo Pesce
- Division of Prosthodontics and Implant Prosthodontics, Department of Surgical Sciences (DISC), University of Genoa, 16132 Genoa, Italy
| | - Nicola De Angelis
- Division of Restorative Dentistry and Endodontics, Department of Surgical Sciences (DISC), University of Genoa, 16126 Genoa, Italy
- Dental Department, University Tunku Abdul Raman, Sungai Buloh 47000, Malaysia
- Dental Department, University Trisakti, Jakarta 11440, Indonesia
- Correspondence:
| | - Stefano Benedicenti
- Division of Restorative Dentistry and Endodontics, Department of Surgical Sciences (DISC), University of Genoa, 16126 Genoa, Italy
| | - Maria Menini
- Division of Prosthodontics and Implant Prosthodontics, Department of Surgical Sciences (DISC), University of Genoa, 16132 Genoa, Italy
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