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Shen X, Yang S, Xu Y, Qi W, He F. Marginal bone loss of tissue- or bone-level implants after simultaneous guided bone regeneration in the posterior mandibular region: A retrospective cohort study. Clin Implant Dent Relat Res 2023; 25:68-76. [PMID: 36239210 DOI: 10.1111/cid.13144] [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: 08/13/2022] [Revised: 09/27/2022] [Accepted: 09/28/2022] [Indexed: 11/03/2022]
Abstract
PURPOSE To analyze the marginal bone loss (ΔMBL) of tissue- or bone-level implants after placed with simultaneous guided bone regeneration (GBR). MATERIALS AND METHODS A total of 151 patients who received 104 tissue-level or 128 bone-level implants placement with simultaneous GBR in the mandibular posterior region between January 2011 and December 2016 were included in this study. The marginal bone level (MBL) was recorded using the radiographic data obtained at implant placement, second-stage surgery, and the follow-up visit. Generalized estimating equation (GEE) was used to compare the ΔMBL of tissue- and bone-level implants, and the influencing factors of ΔMBL were further analyzed. RESULTS At the last follow-up visit, the MBL of tissue-level implants was 0.73 ± 0.86 mm, above the rough-smooth interface, while that of bone-level implants was 0.82 ± 1.05 mm, above the implant platform. The ΔMBL of tissue-level implants was 1.03 mm, which was slightly higher than 0.81 mm of bone-level implants, but there was no significant difference (p > 0.05). No contributing factor associated with ΔMBL was identified by multivariate regression analysis in this study. CONCLUSION Within the limits of this retrospective analysis, the ΔMBL of tissue-level implants is similar to that of bone-level implants after placed with simultaneous GBR, and both types of implants can achieve desirable marginal bone stability.
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Affiliation(s)
- Xiaoting Shen
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou, China
| | - Sijia Yang
- Department of prosthodontics, The Central Hospital of Wuhan, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yangbo Xu
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou, China
| | - Wenting Qi
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou, China
| | - Fuming He
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou, China
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2
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Moergel M, Rocha S, Messias A, Nicolau P, Guerra F, Wagner W. Clinical and radiographic performance of self-locking conical connection implants in the posterior mandible: Five-year results of a two-centre prospective study. Clin Oral Implants Res 2021; 32:998-1007. [PMID: 34115893 PMCID: PMC8457113 DOI: 10.1111/clr.13794] [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: 09/25/2020] [Revised: 05/09/2021] [Accepted: 05/23/2021] [Indexed: 12/12/2022]
Abstract
OBJECTIVE This prospective study aims to assess the 5-year clinical performance of implants with internal conical connection and platform-switched abutments in the posterior mandible. MATERIAL AND METHODS Healthy adults missing at least two teeth in the posterior mandible and with a natural tooth mesial to the implant site received two or three adjacent implants. After a transmucosal healing period single crown restorations were cemented on platform-switched abutments. Changes in marginal bone levels were investigated in standardized periapical radiographs from surgery and loading (baseline) to 60-months post-loading. RESULTS Twenty-four patients received 52 implants. Bone remodelling took place between surgery and loading (mean:-0.5, SD:±0.4 mm). From loading to 60 months, there was a mean bone change of 0.27 (SD:±0.47 mm) which stabilized 24 months after prosthesis delivery (mean:0.2, SD:±0.46 mm). 71.7% of all implants presented bone preservation at 60 months irrespective of the initial insertion depth. Two implants were lost after 5 years and the success rate was 95.1%. Patient enquiry revealed high satisfaction. CONCLUSION Internal conical connection implants with platform-switched abutments presented a high success rate and preservation of marginal bone levels at the implant shoulder after 5 years of loading.
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Affiliation(s)
- Maximilian Moergel
- Department of Oral and Maxillofacial Surgery, Johannes Gutenberg-University Medical Centre, Mainz, Germany
| | - Salomão Rocha
- Department of Dentistry, Faculty of Medicine, University of Coimbra, Coimbra, Portugal
| | - Ana Messias
- Department of Dentistry, Faculty of Medicine, University of Coimbra, Coimbra, Portugal
| | - Pedro Nicolau
- Department of Dentistry, Faculty of Medicine, University of Coimbra, Coimbra, Portugal
| | - Fernando Guerra
- Department of Dentistry, Faculty of Medicine, University of Coimbra, Coimbra, Portugal
| | - Wilfried Wagner
- Department of Oral and Maxillofacial Surgery, Johannes Gutenberg-University Medical Centre, Mainz, Germany
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Agustín-Panadero R, Soriano-Valero S, Labaig-Rueda C, Fernández-Estevan L, Solá-Ruíz MF. Implant-supported metal-ceramic and resin-modified ceramic crowns: A 5-year prospective clinical study. J Prosthet Dent 2020; 124:46-52.e2. [DOI: 10.1016/j.prosdent.2019.07.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2018] [Revised: 06/17/2019] [Accepted: 07/05/2019] [Indexed: 10/25/2022]
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4
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Ackermann KL, Barth T, Cacaci C, Kistler S, Schlee M, Stiller M. Clinical and patient-reported outcome of implant restorations with internal conical connection in daily dental practices: prospective observational multicenter trial with up to 7-year follow-up. Int J Implant Dent 2020; 6:14. [PMID: 32266497 PMCID: PMC7138872 DOI: 10.1186/s40729-020-00211-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Accepted: 03/12/2020] [Indexed: 11/12/2022] Open
Abstract
Background The interpretation of the results of randomized clinical trials is often questioned in relation with daily circumstances in practices. This prospective observational multicenter study was instigated to reflect the need for information in real-life situations with dental implants with internal conical implant-abutment connection (Conelog implant system). The implants were followed up at least 5-year post-loading; survival analysis (Kaplan-Meier), changes of soft tissue, and bone level over time, as well as patient satisfaction were evaluated. Results In total, 130 dental implants were placed in 94 patients (64 female, 30 male). Mean age of patients was 50.4 ± 13.7. At 5-year post-loading, 104 implants in 76 patients were available for evaluation. The cumulative implant survival rate was 96.6%. After an initial bone remodeling process post-surgery (bone loss of − 0.52 ± 0.55 mm), the bone level change remained clinically stable from loading to 5-year post-loading (− 0.09 ± 0.43 mm). Patient satisfaction surveyed by questionnaire (comfort, ability to chew and taste, esthetics, general satisfaction) steadily increased towards the end. At the last study follow-up, all the patients rated their general satisfaction as either very satisfied (87.5%) or satisfied (12.5%). Conclusion The study implants have shown to be highly effective with reliable peri-implant tissue stability over the 5 to 7 years of observation for both single tooth restorations and fixed partial dentures while used in standard conditions in daily dental practice. The results obtained are comparable with those obtained in controlled clinical trials.
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Affiliation(s)
| | | | | | | | - Markus Schlee
- , Forchheim, Germany.,Department of Maxillofacial Surgery, Goethe University Frankfurt, Frankfurt, Germany
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5
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Zandim-Barcelos DL, Carvalho GGD, Sapata VM, Villar CC, Hämmerle C, Romito GA. Implant-based factor as possible risk for peri-implantitis. Braz Oral Res 2019; 33:e067. [PMID: 31576951 DOI: 10.1590/1807-3107bor-2019.vol33.0067] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2019] [Accepted: 06/11/2019] [Indexed: 11/21/2022] Open
Abstract
Peri-implantitis is currently a topic of major interest in implantology. Considered one of the main reasons of late implant failure, there is an emerged concern whether implant characteristics could trigger inflammatory lesion and loss of supporting bone. The purpose of this narrative review is to provide an evidence based overview on the influence of implant-based factors in the occurrence of peri-implantitis. A literature review was conducted addressing the following topics: implant surface topography; implant location; occlusal overload; time in function; prosthesis-associated factors (rehabilitation extension, excess of cement and implant-abutment connection); and metal particle release. Although existing data suggests that some implant-based factors may increase the risk of peri-implantitis, the evidence is still limited to consider them a true risk factor for peri-implantitis. In conclusion, further evidences are required to a better understanding of the influence of implant-based factors in the occurrence of peri-implantitis. Large population-based studies including concomitant analyses of implant- and patient-based factors are required to provide strong evidence of a possible association with peri-implantitis in a higher probability. The identification of these factors is essential for the establishment of strategies to prevent peri-implantitis.
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Affiliation(s)
- Daniela Leal Zandim-Barcelos
- Universidade Estadual Paulista - Unesp, Araraquara School of Dentistry, Department of Diagnosis and Surgery, Araraquara, SP, Brazil
| | - Gabriel Garcia de Carvalho
- Universidade Estadual Paulista - Unesp, Araraquara School of Dentistry, Department of Diagnosis and Surgery, Araraquara, SP, Brazil
| | - Vitor Marques Sapata
- Universidade de São Paulo - USP, Dental School, Department of Stomatology, São Paulo, Brazil
| | - Cristina Cunha Villar
- Universidade de São Paulo - USP, Dental School, Department of Stomatology, São Paulo, Brazil
| | - Christoph Hämmerle
- University of Zurich, Clinic for Fixed and Removable Prosthodontics and Dental Material Science, Zurich, Switzerland
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6
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Clinical Factors and Cellular Responses of In Situ Human Alveolar Bone–Derived Mesenchymal Stromal Cells Associated With Early Periimplant Marginal Bone Loss. IMPLANT DENT 2019; 28:421-429. [DOI: 10.1097/id.0000000000000904] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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7
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Yoo J, Moon IS, Yun JH, Chung C, Huh JK, Lee DW. Effect of initial placement level and wall thickness on maintenance of the marginal bone level in implants with a conical implant-abutment interface: a 5-year retrospective study. J Periodontal Implant Sci 2019; 49:185-192. [PMID: 31285942 PMCID: PMC6599752 DOI: 10.5051/jpis.2019.49.3.185] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2019] [Accepted: 06/10/2019] [Indexed: 11/30/2022] Open
Abstract
Purpose Implant wall thickness and the height of the implant-abutment interface are known as factors that affect the distribution of stress on the marginal bone around the implant. The goal of this study was to evaluate the long-term effects of supracrestal implant placement and implant wall thickness on maintenance of the marginal bone level. Methods In this retrospective study, 101 patients with a single implant were divided into the following 4 groups according to the thickness of the implant wall and the initial implant placement level immediately after surgery: 0.75 mm wall thickness, epicrestal position; 0.95 mm wall thickness, epicrestal position; 0.75 mm wall thickness, supracrestal position; 0.95 mm wall thickness, supracrestal position. The marginal bone level change was assessed 1 day after implant placement, immediately after functional loading, and 1 to 5 years after prosthesis delivery. To compare the marginal bone level change, repeated-measures analysis of variance was used to evaluate the statistical significance of differences within groups and between groups over time. Pearson correlation coefficients were also calculated to analyze the correlation between implant placement level and bone loss. Results Statistically significant differences in bone loss among the 4 groups (P<0.01) and within each group over time (P<0.01) were observed. There was no significant difference between the groups with a wall thickness of 0.75 mm and 0.95 mm. In a multiple comparison, the groups with a supracrestal placement level showed greater bone loss than the epicrestal placement groups. In addition, a significant correlation between implant placement level and marginal bone loss was observed. Conclusions The degree of bone resorption was significantly higher for implants with a supracrestal placement compared to those with an epicrestal placement.
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Affiliation(s)
- Jaehyun Yoo
- Department of Periodontology, Gangnam Severance Dental Hospital, Yonsei University College of Dentistry, Seoul, Korea
| | - Ik-Sang Moon
- Department of Periodontology, Gangnam Severance Dental Hospital, Yonsei University College of Dentistry, Seoul, Korea
| | - Jeong-Ho Yun
- Department of Periodontology, Institute of Oral Bioscience, Chonbuk National University School of Dentistry, Jeonju, Korea
| | - Chooryung Chung
- Department of Orthodontics, Gangnam Severance Dental Hospital, Yonsei University College of Dentistry, Seoul, Korea
| | - Jong-Ki Huh
- Department of Oral and Maxillofacial Surgery, Gangnam Severance Dental Hospital, Yonsei University College of Dentistry, Seoul, Korea
| | - Dong-Won Lee
- Department of Periodontology, Gangnam Severance Dental Hospital, Yonsei University College of Dentistry, Seoul, Korea
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8
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Messias A, Nicolau P, Guerra F. Titanium dental implants with different collar design and surface modifications: A systematic review on survival rates and marginal bone levels. Clin Oral Implants Res 2018; 30:20-48. [PMID: 30466192 DOI: 10.1111/clr.13389] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2017] [Revised: 11/01/2018] [Accepted: 11/04/2018] [Indexed: 01/15/2023]
Abstract
AIM The aim of this study was to compare clinical and radiographic outcomes of dental implants with different neck characteristics. METHODS A protocol-oriented search aimed at the question: "In patients subjected to tooth replacement with screw-type dental implants does the modification of the implant neck macro- or microgeometry contribute to the improvement of survival rates and maintenance of the peri-implant marginal bone levels?" Primary outcomes were survival and marginal bone level (MBL) changes evaluated on randomized controlled trials with >10 participants and follow-up >1 year. Risk of bias was evaluated using the Cochrane Collaboration's tool. The review follows the PRISMA statement. RESULTS Forty-three studies compared: (a) One- versus two-piece implants (N = 7); (b) Two-piece implants with different neck characteristics (machined and rough collars, microthreads, LASER microtexturing) (N = 21); (c) Two-piece implants with macrogeometry modifications (tapering, back-tapering, and scalloping) (N = 6). One- and two-piece implants showed similar survival (RR = 0.45, 95% CI: [0.12, 1.66], p = 0.23) and MBL changes (WMD = 0.09 mm, 95% CI: [-0.27, 0.45], p = 0.64) at 1-year post-loading. Machined collar implants have higher risk of early failure than rough collar implants (RR = 3.96, 95% CI: [1.12, 13.93], p = 0.03) and 0.43 mm higher bone resorption (95% CI: [0.0, 0.86], p = 0.05). Microthreads (WMD = 0.07 mm, 95% CI: [-0.01, 0.15], p = 0.10) and LASER microtexturing (WMD = 0.15 mm, 95% CI: [-0.35, 0.65], p = 0.56) do not reduce bone resorption. Scalloped implants have 1.26 mm higher resorption (95% CI: [0.72, 2.00], p < 0.001). CONCLUSIONS One- and two-piece implants have similar survival and MBL changes. Rough collar implants have lower MBL changes than machined collar implants. Additional modifications to rough collars are irrelevant.
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Affiliation(s)
- Ana Messias
- Dentistry Department, Faculty of Medicine of the University of Coimbra, Coimbra, Portugal
| | - Pedro Nicolau
- Dentistry Department, Faculty of Medicine of the University of Coimbra, Coimbra, Portugal
| | - Fernando Guerra
- Dentistry Department, Faculty of Medicine of the University of Coimbra, Coimbra, Portugal
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9
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Beschnidt SM, Cacaci C, Dedeoglu K, Hildebrand D, Hulla H, Iglhaut G, Krennmair G, Schlee M, Sipos P, Stricker A, Ackermann KL. Implant success and survival rates in daily dental practice: 5-year results of a non-interventional study using CAMLOG SCREW-LINE implants with or without platform-switching abutments. Int J Implant Dent 2018; 4:33. [PMID: 30386925 PMCID: PMC6212375 DOI: 10.1186/s40729-018-0145-3] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2018] [Accepted: 09/12/2018] [Indexed: 11/23/2022] Open
Abstract
Background The performance of dental implants in controlled clinical studies is often investigated in homogenous populations. Observational studies are necessary to evaluate the outcome of implant restorations placed in real-life situations, according to standard practice, and to assess the needs of the patients. The aim of this non-interventional study was to reveal the survival, success, and general performance of CAMLOG SCREW-LINE implants and their restorations in daily dental practice. Methods Seventeen private practices across five countries participated in this prospective multicenter study. Patients received implants in the maxilla and mandible which were restored either with platform-matching or platform-switching abutments. Patients were followed-up for up to 5 years post-loading. Radiographs and clinical parameters were evaluated and patient satisfaction was evaluated. Results From a total of 196 patients planned, 185 patients with 271 implants were restored with abutments and fulfilled the follow-up inclusion criteria. Three implant failures were recorded, resulting in a cumulative survival rate of 98.6% after 5 years post-loading. One persistent complication of peri-implantitis occurred. The soft tissue health remained stable, and the papilla height improved after loading. At 5-year follow-up, the mean crestal bone loss was − 0.28 ± 0.60 mm; over 99% of patients reported satisfaction with the restoration as excellent or good. Conclusions Implants placed and restored with both platform-matching and platform-switching abutments in daily dental private practice achieved excellent clinical outcomes with highly satisfied patients after 5 years of function, confirming the results obtained in well-controlled clinical trials.
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Affiliation(s)
| | | | | | | | | | - Gerhard Iglhaut
- Private practice, Memmingen, Germany.,Department Oral and Maxillofacial Surgery/Plastic Surgery, University Hospital Freiburg, Center for Dental Medicine, Freiburg, Germany
| | | | - Markus Schlee
- Private practice, Forchheim, Germany.,Department of Maxillofacial Surgery, Goethe University Frankfurt, Frankfurt, Germany
| | - Paul Sipos
- Private practice, Amstelveen, Netherlands
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10
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Cacaci C, Ackermann KL, Barth T, Kistler S, Stiller M, Schlee M. A non-interventional multicenter study to document the implants success and survival rates in daily dental practices of the CONELOG screw-line implant. Clin Oral Investig 2018; 23:2609-2616. [DOI: 10.1007/s00784-018-2646-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2017] [Accepted: 09/20/2018] [Indexed: 11/28/2022]
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11
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Schwitalla AD, Zimmermann T, Spintig T, Abou-Emara M, Lackmann J, Müller WD, Houshmand A. Maximum insertion torque of a novel implant-abutment-interface design for PEEK dental implants. J Mech Behav Biomed Mater 2017; 77:85-89. [PMID: 28898725 DOI: 10.1016/j.jmbbm.2017.09.005] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2017] [Revised: 08/29/2017] [Accepted: 09/03/2017] [Indexed: 11/25/2022]
Abstract
Frequent reports attest to the various advantages of tapered implant/abutment interfaces (IAIs) compared to other types of interfaces. For this reason, a conical IAI was designed as part of the development of a PEEK (polyetheretherketone)-based dental implant. This IAI is equipped with an apically displaced anti-rotation lock with minimal space requirements in the form of an internal spline. The objective of this study was the determination of the average insertion torque (IT) at failure of this design, so as to determine its suitability for immediate loading, which requires a minimum IT of 32Ncm. 10 implants each made of unfilled PEEK, carbon fiber reinforced ("CFR") PEEK (> 50vol% continuous axially parallel fibers) as well as of titanium were produced and tested in a torque test bench. The average IT values at failure of the unfilled PEEK implants were measured at 22.6 ± 0.5Ncm and were significantly higher than those of the CFR-Implants (20.2 ± 2.5Ncm). The average IT values at failure of the titanium specimens were significantly higher (92.6 ± 2.3Ncm) than those of the two PEEK variants. PEEK- and CFR-PEEK-implants in the present form cannot adequately withstand the insertion force needed to achieve primary stability for immediate loading. Nevertheless, the achievable torque resilience of the two PEEK-variants may be sufficient for a two-stage implantation procedure. To improve the torque resistance of the PEEK implant material the development of a new manufacturing procedure is necessary which reinforces the PEEK base with continuous multi-directional carbon fibers as opposed to the axially parallel fibers of the tested PEEK compound.
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Affiliation(s)
- Andreas Dominik Schwitalla
- Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Dental Materials and Biomaterial Research, Department of Prosthodontics, Geriatric Dentistry and Craniomandibular Disorders, Aßmannshauser Str. 4-6, 14197 Berlin, Germany; Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Department of Prosthodontics, Geriatric Dentistry and Craniomandibular Disorders, Aßmannshauser Str. 4-6, 14197 Berlin, Germany
| | - Tycho Zimmermann
- Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Dental Materials and Biomaterial Research, Department of Prosthodontics, Geriatric Dentistry and Craniomandibular Disorders, Aßmannshauser Str. 4-6, 14197 Berlin, Germany
| | - Tobias Spintig
- Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Dental Materials and Biomaterial Research, Department of Prosthodontics, Geriatric Dentistry and Craniomandibular Disorders, Aßmannshauser Str. 4-6, 14197 Berlin, Germany
| | - Mohamed Abou-Emara
- Beuth University of Applied Sciences, Luxemburger Str. 10, 13353 Berlin, Germany
| | - Justus Lackmann
- Beuth University of Applied Sciences, Luxemburger Str. 10, 13353 Berlin, Germany
| | - Wolf-Dieter Müller
- Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Dental Materials and Biomaterial Research, Department of Prosthodontics, Geriatric Dentistry and Craniomandibular Disorders, Aßmannshauser Str. 4-6, 14197 Berlin, Germany.
| | - Alireza Houshmand
- Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Department of Prosthodontics, Geriatric Dentistry and Craniomandibular Disorders, Aßmannshauser Str. 4-6, 14197 Berlin, Germany
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12
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Waechter J, Madruga MDM, Carmo Filho LCD, Leite FRM, Schinestsck AR, Faot F. Comparison between tapered and cylindrical implants in the posterior regions of the mandible: A prospective, randomized, split-mouth clinical trial focusing on implant stability changes during early healing. Clin Implant Dent Relat Res 2017; 19:733-741. [DOI: 10.1111/cid.12501] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2016] [Revised: 05/07/2017] [Accepted: 05/08/2017] [Indexed: 11/29/2022]
Affiliation(s)
- Janine Waechter
- Graduate Program in Dentistry; Federal University of Pelotas; Pelotas RS Brazil
| | | | - Luiz Carlos do Carmo Filho
- Department of Prosthodontics and Periodontology; Piracicaba Dental School, University of Campinas; Piracicaba Brazil
| | | | | | - Fernanda Faot
- Department of Restorative Dentistry; School of Dentistry, Federal University of Pelotas; Brazil
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13
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Rocha S, Wagner W, Wiltfang J, Nicolau P, Moergel M, Messias A, Behrens E, Guerra F. Effect of platform switching on crestal bone levels around implants in the posterior mandible: 3 years results from a multicentre randomized clinical trial. J Clin Periodontol 2016; 43:374-82. [PMID: 26847169 PMCID: PMC5071662 DOI: 10.1111/jcpe.12522] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/01/2016] [Indexed: 11/28/2022]
Abstract
Objective Evaluation of differences in the clinical performance and crestal bone levels between implants restored with single crowns with platform‐matched or platform‐switched abutments after 3 years. Material and Methods The study enrolled adult patients missing two or more adjacent teeth in the posterior mandible with natural teeth mesial to the implant site. Randomization followed open‐flap implant insertion and the corresponding matching or switching healing abutments placed at surgery. Conventional loading was made with cemented crowns. Clinical follow‐up took place annually after loading up to 3 years. Bone level changes were measured in standardized radiographs as the variation in crestal bone from one evaluation to the next. Results Sixty‐three patients with a total of 135 implants (66 platform matching, 69 platform switching) were analysed. From surgery to 36 months, mean bone loss was 0.28 ± 0.56 mm for the platform‐switching group and 0.68 ± 0.64 mm for the platform‐matching group. A statistically significant difference was found between groups (p = 0.002) with an estimate of 0.39 mm (0.15–0.64, 95% CI) in favour of platform switching. Conclusions After 3 years, platform‐switching restorations showed a significant effect in the preservation of marginal bone levels compared to platform‐matching restorations.
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Affiliation(s)
- Salomão Rocha
- Faculty of Medicine, University of Coimbra, Coimbra, Portugal
| | - Wilfried Wagner
- Medical Centre of Johannes Gutenberg University of Mainz, Mainz, Germany
| | - Jörg Wiltfang
- Schleswig-Holstein University Hospital, University of Kiel, Kiel, Germany
| | - Pedro Nicolau
- Faculty of Medicine, University of Coimbra, Coimbra, Portugal
| | - Maximilian Moergel
- Medical Centre of Johannes Gutenberg University of Mainz, Mainz, Germany
| | - Ana Messias
- Faculty of Medicine, University of Coimbra, Coimbra, Portugal
| | - Eleonore Behrens
- Schleswig-Holstein University Hospital, University of Kiel, Kiel, Germany
| | - Fernando Guerra
- Faculty of Medicine, University of Coimbra, Coimbra, Portugal
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14
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Moergel M, Rocha S, Messias A, Nicolau P, Guerra F, Wagner W. Radiographic evaluation of conical tapered platform-switched implants in the posterior mandible: 1-year results of a two-center prospective study. Clin Oral Implants Res 2015; 27:686-93. [PMID: 26096450 PMCID: PMC5054904 DOI: 10.1111/clr.12644] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/18/2015] [Indexed: 12/01/2022]
Abstract
OBJECTIVE Long-term success of dental implants depends on healthy peri-implant soft tissues and adequate bone levels. This prospective study aims to assess bone level changes around implants with internal conical connection and platform-switching abutments in the posterior mandible. MATERIAL AND METHODS Adult patients missing at least two teeth in the posterior mandible and with a natural tooth mesial to the implant site received two or three adjacent internal conical connection implants. After a minimum transmucosal healing period of 8 weeks, single crown restorations were cemented over platform-switching abutments. Changes in marginal bone levels were measured in standardized periapical radiographs from surgery and loading (baseline) to 12 months post-loading. RESULTS Twenty-four patients received 52 implants. Bone remodeling took place between surgery and loading (-0.53 ± 0.40 mm). From loading to 12 months, there was a mean bone gain of 0.12 ± 0.42 mm which occurred mainly in the first 6 months after prosthesis delivery (0.11 ± 0.36 mm) and stabilized afterward. A total of 71.7% of all implants presented bone preservation or gain. No implant was lost at 1 year and the success rate was 100%. Patient inquiry revealed high satisfaction. CONCLUSION Internal conical connection implants with platform-switching abutments presented high success rate and enhancement or preservation of marginal bone levels after 1 year of loading.
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Affiliation(s)
- Maximilian Moergel
- Department of Oral and Maxillofacial Surgery, Johannes Gutenberg-University, Medical Centre, Mainz, Germany
| | - Salomão Rocha
- Department of Dentistry, Faculty of Medicine, University of Coimbra, Coimbra, Portugal
| | - Ana Messias
- Department of Dentistry, Faculty of Medicine, University of Coimbra, Coimbra, Portugal
| | - Pedro Nicolau
- Department of Dentistry, Faculty of Medicine, University of Coimbra, Coimbra, Portugal
| | - Fernando Guerra
- Department of Dentistry, Faculty of Medicine, University of Coimbra, Coimbra, Portugal
| | - Wilfried Wagner
- Department of Oral and Maxillofacial Surgery, Johannes Gutenberg-University, Medical Centre, Mainz, Germany
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