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Puljic D, Petricevic N, Celebic A, Kovacic I, Milos M, Pavic D, Milat O. Mandibular Overdenture Supported by Two or Four Unsplinted or Two Splinted Ti-Zr Mini-Implants: In Vitro Study of Peri-Implant and Edentulous Area Strains. Biomimetics (Basel) 2024; 9:178. [PMID: 38534864 DOI: 10.3390/biomimetics9030178] [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: 12/22/2023] [Revised: 03/09/2024] [Accepted: 03/12/2024] [Indexed: 03/28/2024] Open
Abstract
Clinical indications for the newly released Ti-Zr (Roxolid®) alloy mini-implants (MDIs) aimed for overdenture (OD) retention in subjects with narrow alveolar ridges are not fully defined. The aim of this study was to analyze peri-implant and posterior edentulous area microstrains utilizing models of the mandible mimicking a "real" mouth situation with two (splinted with a bar or as single units) or four unsplinted Ti-Zr MDIs. The models were virtually designed from a cone beam computed tomography (CBCT) scan of a convenient patient and printed. The artificial mucosa was two millimeters thick. After MDI insertion, the strain gauges were bonded on the oral and vestibular peri-implant sites, and on distal edentulous areas under a denture. After attaching the ODs to MDIs, the ODs were loaded using a metal plate positioned on the first artificial molars (posterior loadings) bilaterally and unilaterally with 50, 100, and 150 N forces, respectively. During anterior loadings, the plate was positioned on the denture's incisors and loaded with 50 and 100 N forces. Each loading was repeated 15 times. The means with standard deviations, and the significance of the differences (two- and three-factor MANOVA) were calculated. Variations in the MDI number, location, and splinting status elicited different microstrains. Higher loading forces elicited higher microstrains. Unilateral loadings elicited higher microstrains than bilateral and anterior loadings, especially on the loading side. Peri-implant microstrains were lower in the four-MDI single-unit model than in both two-MDI models (unsplinted and splinted). Posterior implants showed higher peri-implant microstrains than anterior in the four-MDI model. The splinting of the two-MDI did not have a significant effect on peri-implant microstrains but elicited lower microstrains in the posterior edentulous area. The strains did not exceed the bone reparatory mechanisms, although precaution and additional study should be addressed when two Ti-Zr MDIs support mandibular ODs.
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Affiliation(s)
- Dario Puljic
- Department of Removable Prosthodontics, University of Zagreb School of Dental Medicine, 10000 Zagreb, Croatia
| | - Nikola Petricevic
- Department of Removable Prosthodontics, University of Zagreb School of Dental Medicine, 10000 Zagreb, Croatia
| | - Asja Celebic
- Department of Removable Prosthodontics, University of Zagreb School of Dental Medicine, 10000 Zagreb, Croatia
| | - Ines Kovacic
- Department of Removable Prosthodontics, University of Zagreb School of Dental Medicine, 10000 Zagreb, Croatia
| | - Manuela Milos
- Department of Removable Prosthodontics, University of Zagreb School of Dental Medicine, 10000 Zagreb, Croatia
| | - Dalibor Pavic
- Department of Removable Prosthodontics, University of Zagreb School of Dental Medicine, 10000 Zagreb, Croatia
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Trang BNH, Kanazawa M, Murakami N, Wakabayashi N, Hada T, Sahaprom N, Komagamine Y, Minakuchi S. Stress distribution of one-piece and two-piece mini-Implant overdentures with various attachment systems and diameters: A finite element analysis. J Prosthodont Res 2023; 67:430-436. [PMID: 36372437 DOI: 10.2186/jpr.jpr_d_22_00108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/01/2023]
Abstract
PURPOSE We investigated and compared the stress distribution within one- and two-piece mini-implants for overdentures with three different attachments (ball, Locator, and magnet) and two different diameters using three-dimensional finite element (3D FE) analysis and a monotonic bending test. The goal was to identify the most beneficial implant attachment system design for mini-implant overdentures with a lower risk of implant fracture. METHODS Twelve 3D FE models simulating a mandible segment with one- and two-piece mini-implants with different attachment systems, diameters, and overdentures were created using three-dimensional computer-aided design (CAD) software. Vertical and oblique forces (45° to the longitudinal axis of the implant) of 100 N were applied to the dentures. The stress distribution was analyzed. A bending test was performed on a mini-implant (Locator, 2.4 mm) using a testing machine to quantify the load at yield stress. RESULTS One-piece mini-implants showed lower maximum stress compared to two-piece mini-implants. Among the three designs, the magnet attachment systems showed the maximum stress. The maximum von Mises stress occurred at the neck of the implants, which was surrounded by cortical bone in all models, and under both loading conditions. CONCLUSIONS Focusing on the attachments and one- and two-piece designs of mini-implant overdentures using CAD models to reduce confounding factors affecting the stress distribution, we concluded that one-piece mini-implants tended to show lower stress compared to two-piece mini-implants. Mini-implant overdentures with Locator and ball attachments demonstrated lower stress within the implants compared to those with magnet attachments under vertical and oblique loading conditions.
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Affiliation(s)
- Bui Ngoc Huyen Trang
- Gerodontology and Oral Rehabilitation, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Japan
| | - Manabu Kanazawa
- Digital Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Japan
| | - Natsuko Murakami
- Advanced Prosthodontics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Japan
| | - Noriyuki Wakabayashi
- Advanced Prosthodontics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Japan
| | - Tamaki Hada
- Gerodontology and Oral Rehabilitation, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Japan
| | - Namano Sahaprom
- Gerodontology and Oral Rehabilitation, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Japan
- Dental Hospital, Faculty of Dentistry, Chulalongkorn University, Thailand
| | - Yuriko Komagamine
- Gerodontology and Oral Rehabilitation, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Japan
| | - Shunsuke Minakuchi
- Gerodontology and Oral Rehabilitation, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Japan
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Khorshid HE, Issa NO, Ekram AM. Effect of implant diameter and cantilever length on the marginal bone height changes and stability of implants supporting screw retained prostheses: A randomized double blinded control trial. J Adv Prosthodont 2023; 15:101-113. [PMID: 37441715 PMCID: PMC10333100 DOI: 10.4047/jap.2023.15.3.101] [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: 01/03/2023] [Revised: 04/11/2023] [Accepted: 04/16/2023] [Indexed: 07/15/2023] Open
Abstract
PURPOSE This randomized controlled trial aimed to evaluate the effect of implants' two different diameters and cantilever lengths on the marginal bone loss and stability of mplants supporting maxillary prostheses. MATERIALS AND METHODS Ninety-six implants were placed in sixteen completely edentulous maxillary ridges. Patients were randomly divided into two groups: Group A, implants were placed with a cantilever to anterior-posterior AP spread length (CL:AP) at a ratio of 1:3; Group B, implants were placed with a CL:AP at a ratio of 1:2. Patients were further divided into four sub-groups: Groups A1, A2, B1, and B2. Groups A1 and B1 received small diameter implants while Groups A2 and B2 received standard diameter implants. Bone height and stability measurements around each implant were performed at 0, 4, 8 and 24 months after definitive prostheses delivery. RESULTS Statistical analysis of the mean implant stability and height values revealed an insignificant difference between Group A1 and Group A2 at all the different time intervals while significantly higher values in Group B1 in comparison with Group B2. Results also showed significantly higher values in Group A1 in comparison with Group B1 and an insignificant difference between Group A2 and Group B2 at all the different time intervals. CONCLUSION It can be concluded that the use of small diameter implants placed with a CL:AP at a ratio of 1:3 provided predictable results and that the 1:2 CL:AP significantly induced more critical bone loss in the small diameter implants group, which can significantly reduce long term success and survival of implants.
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Affiliation(s)
| | - Noha Ossama Issa
- Oral and Maxillofacial Radiology, Faculty of Dentistry, Cairo University, Giza, Egypt
| | - Amr Mohamed Ekram
- Oral and Maxillofacial Surgery Consultant, Private practice, Cairo, Egypt
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Kämmerer PW, Wolf JM, Buttchereit I, Frerich B, Ottl P. Prospective clinical implementation of optional implant treatment into pregraduate dental education-mini implants for retention and support of mandibular overdentures. Int J Implant Dent 2021; 7:87. [PMID: 34505196 PMCID: PMC8429539 DOI: 10.1186/s40729-021-00371-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2021] [Accepted: 06/16/2021] [Indexed: 11/17/2022] Open
Abstract
Background The primary aim of the study was to evaluate mini implant (MDI) survival, prosthodontic maintenance, and patient-reported outcome measures after conducting an optional pregraduate academic course on patients with mandibular edentulism including fabrication of overdentures and MDI planning and placement as well as chair-side incorporation of the respective restauration. In a prospective clinical study, 20 patients received 80 MDIs that were restored with mandibular overdentures. All treatment steps including placement of 40 MDIs were conducted by undergraduate students under strict guidance of a consultant. Next to students’ perceptions after participation, survival of MDIs, and prosthodontic maintenance, patients’ perceptions as well as peri-implant parameters were assessed after 4 weeks and 3 and 12 months. Results Three MDIs fractured (two during insertion and one after 3 months; total survival 96.25%). Two overdentures fractured and a total of 23 cases of minor prosthodontic maintenance were required. Over time, patients’ satisfaction significantly increased. Besides, questionnaires showed a high rate of students’ positive perception and high self-confidence to include MDI therapy into own practice. Conclusions The results are in accordance to those reported by postgraduate dentists. In accordance, therapy with MDI-retained mandibular overdentures seems to be feasible and successful at pregraduate level if the students receive guidance.
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Affiliation(s)
- Peer W Kämmerer
- Department of Oral, Maxillofacial and Facial Plastic Surgery, University Medical Centre Mainz, Augustusplatz 2, 55131, Mainz, Germany. .,Department of Oral, Maxillofacial and Facial Plastic Surgery, University Medical Centre Rostock, Schillingallee 35, 18057, Rostock, Germany.
| | - Jens M Wolf
- Department of Prosthodontics and Materials Science, University Medical Centre Rostock, Strempelstraße 13, 18057, Rostock, Germany
| | - Ingo Buttchereit
- Department of Oral, Maxillofacial and Facial Plastic Surgery, University Medical Centre Rostock, Schillingallee 35, 18057, Rostock, Germany
| | - Bernhard Frerich
- Department of Oral, Maxillofacial and Facial Plastic Surgery, University Medical Centre Rostock, Schillingallee 35, 18057, Rostock, Germany
| | - Peter Ottl
- Department of Prosthodontics and Materials Science, University Medical Centre Rostock, Strempelstraße 13, 18057, Rostock, Germany.,Department Life, Light & Matter, University of Rostock, 18051, Rostock, Germany
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Wang B, Ho KS, Neo TK, Cheng AC. Mini-dental implants for definitive prosthesis retention - A synopsis of the current evidence. SINGAPORE DENTAL JOURNAL 2019; 39:1-9. [PMID: 31672092 DOI: 10.1142/s2214607519300015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Background: This narrative review provides an evidence-based overview of the comparison between mini-dental implants (MDI) and conventional dental implants for definitive prosthesis retention. In addition, recommendations are made on whether the use of reduced diameter dental implants is more appropriate. Method: A literature review was conducted via electronic search addressing the following topics: (1) osseointegration, (2) peri-implant soft tissue characteristics, (3) biomechanics, (4) implant survival and (5) implant success. Conclusion: The procedure for dental implant prosthetic rehabilitation should preferentially include conventional dental implants (i.e. [Formula: see text][Formula: see text]mm fixture diameter). Small (3-3.25[Formula: see text]mm) and narrow (3.3-3.5[Formula: see text]mm) dental implants should primarily be used in non-load-bearing regions. MDI ([Formula: see text][Formula: see text]mm) should be considered to retain definitive prosthesis, only for reasons of anatomy or patient-centred preferences and as a last resort. If MDI are to be used, patients should be made aware of the lack of long-term, high-quality evidence as a part of the informed consent process and that most of the prospective data available pertain to MDI retaining complete dentures.
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Affiliation(s)
- Ben Wang
- Specialist Dental Group, Mount Elizabeth Medical Centre, 3 Mount Elizabeth #08-03, 228510, Singapore
| | - Kok Sen Ho
- Specialist Dental Group, Mount Elizabeth Medical Centre, 3 Mount Elizabeth #08-03, 228510, Singapore
| | - Tee Khin Neo
- Specialist Dental Group, Mount Elizabeth Medical Centre, 3 Mount Elizabeth #08-03, 228510, Singapore
| | - Ansgar C Cheng
- Specialist Dental Group, Mount Elizabeth Medical Centre, 3 Mount Elizabeth #08-03, 228510, Singapore
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Wu Y, Feng F, Xin H, Li K, Tang Z, Guo Y, Qin D, An B, Diao X, Dou C. Fracture Strength and Osseointegration of an Ultrafine-Grained Titanium Mini Dental Implant after Macromorphology Optimization. ACS Biomater Sci Eng 2019; 5:4122-4130. [DOI: 10.1021/acsbiomaterials.9b00406] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yulu Wu
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Stomatology, Department of Prosthodontics, School of Stomatology, The Fourth Military Medical University, Xi’an 710032, China
| | - Fan Feng
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Stomatology, Department of Prosthodontics, School of Stomatology, The Fourth Military Medical University, Xi’an 710032, China
| | - Haitao Xin
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Stomatology, Department of Prosthodontics, School of Stomatology, The Fourth Military Medical University, Xi’an 710032, China
| | - Kai Li
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Stomatology, Department of Prosthodontics, School of Stomatology, The Fourth Military Medical University, Xi’an 710032, China
| | - Zhongbin Tang
- School of Aeronautics, Northwestern Polytechnical University, Xi’an 710072, China
| | - Yazhou Guo
- School of Aeronautics, Northwestern Polytechnical University, Xi’an 710072, China
| | - Dongyang Qin
- School of Aeronautics, Northwestern Polytechnical University, Xi’an 710072, China
| | - Baili An
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Stomatology, Department of Prosthodontics, School of Stomatology, The Fourth Military Medical University, Xi’an 710032, China
| | - Xiaoou Diao
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Stomatology, Department of Prosthodontics, School of Stomatology, The Fourth Military Medical University, Xi’an 710032, China
| | - Chenyun Dou
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Stomatology, Department of Prosthodontics, School of Stomatology, The Fourth Military Medical University, Xi’an 710032, China
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Rehabilitation of an Extremely Resorbed Edentulous Mandible by Short and Narrow Dental Implants. Case Rep Dent 2018; 2018:7597851. [PMID: 30671267 PMCID: PMC6317120 DOI: 10.1155/2018/7597851] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2018] [Revised: 10/27/2018] [Accepted: 11/05/2018] [Indexed: 11/28/2022] Open
Abstract
Serious consequences of long-term complete denture wearing may be extreme residual ridge atrophy and a reduced area of keratinized oral mucosa of a denture-bearing area. This paper presents five clinical cases of extreme mandibular ridge atrophy, rehabilitated by means of mandibular overdentures retained by short mini dental implants. The patients had a reduced mandibular bone volume in the interforaminal region, bone height less than 10 mm, and buccolingual bone width less than 4 mm. In order to avoid bone augmentation, patients received four short mini dental implants (MDIs) (6 or 8 mm long; 2.0 or 2.5 mm wide) for the support of mandibular overdentures, which is a new rehabilitation option. After insertion, the MDIs were early loaded with new mandibular overdentures reinforced with the CoCr framework. The patients have been wearing their overdentures for 2 years. One MDI broke during insertion and a new one was added. One patient lost one MDI but successfully continued to wear the overdenture retained by the remaining three MDIs. Mean marginal bone loss (MBL) was 0.20 ± 0.19 mm. Patients significantly improved their OHRQoL and chewing function by reducing the summary scores of the OHIP-14 and the chewing function questionnaires. The improvements remained unchanged throughout the observation period.
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Ida H, Seiryu M, Takeshita N, Iwasaki M, Yokoyama Y, Tsutsumi Y, Ikeda E, Sasaki S, Miyashita S, Sasaki S, Fukunaga T, Deguchi T, Takano-Yamamoto T. Biosafety, stability, and osteogenic activity of novel implants made of Zr 70Ni 16Cu 6Al 8 bulk metallic glass for biomedical application. Acta Biomater 2018; 74:505-517. [PMID: 29772348 DOI: 10.1016/j.actbio.2018.05.020] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2018] [Revised: 05/11/2018] [Accepted: 05/12/2018] [Indexed: 01/22/2023]
Abstract
Superior mechanical and chemical properties of Zr70Ni16Cu6Al8 bulk metallic glass (BMG) demonstrate its promise as a novel biomaterial for fabrication of implants. The aim of the present study was to validate mechanical, chemical, and biological properties of Zr70Ni16Cu6Al8 BMG through comparison with titanium (Ti). Our data indicated higher tensile strength, lower Young's modulus, and reduced metal ion release of Zr70Ni16Cu6Al8 BMG compared with Ti. Biosafety of bone marrow mesenchymal cells on Zr70Ni16Cu6Al8 BMG was comparable to that of Ti. Next, screw-type implant prototypes made of Zr70Ni16Cu6Al8 BMG were fabricated and inserted into rat long bones. Zr70Ni16Cu6Al8 BMG implants indicated a higher removal-torque value and lower Periotest value compared with Ti implants. In addition, higher amounts of new bone formation and osseointegration were observed around Zr70Ni16Cu6Al8 BMG implants compared with Ti implants. Moreover, gene expression analysis displayed higher expression of osteoblast- and osteoclast-associated genes in the Zr70Ni16Cu6Al8 BMG group compared with the Ti group. Importantly, loading to implants upregulated bone formation, as well as osteoblast- and osteoclast-associated gene expression in the peri-implant area. No significant difference in concentrations of Ni, Al, Cu, and Zr in various organs was shown between in the Zr70Ni16Cu6Al8 BMG and Ti groups. Collectively, these findings suggest that Zr70Ni16Cu6Al8 BMG is suitable for fabricating novel implants with superior mechanical properties, biocompatibility, stability, and biosafety compared with Ti. STATEMENT OF SIGNIFICANCE Titanium is widely used to fabricate orthopedic and dental implants. However, Titanium has disadvantages for biomedical applications in regard to strength, elasticity, and biosafety. Recently, we developed a novel hypoeutectic Zr70Ni16Cu6Al8 BMG, which has superior mechanical and chemical properties. However, the validity of Zr70Ni16Cu6Al8 BMG for biomedical application has not been cleared. The aim of the present study was to validate the mechanical, chemical, and biological properties of Zr70Ni16Cu6Al8 BMG for biomedical applications through comparison with Titanium. The present study clarifies that Zr70Ni16Cu6Al8 BMG has good mechanical properties, corrosion resistance, and osteogenic activity, which are necessary features for biomedical applications. The present study provides for the first time the superiority of Zr70Ni16Cu6Al8 BMG implants to Titanium implants for biomedical applications.
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Evaluation of Fatigue Behavior in Dental Implants from In Vitro Clinical Tests: A Systematic Review. METALS 2018. [DOI: 10.3390/met8050313] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Abstract
PURPOSE To investigate the effect of implant diameter on fatigue strength using static and cyclic load test. MATERIALS AND METHODS Four different implant systems-SuperLine (Φ4.0), NRLine (Φ3.1), SlimLine (Φ2.8, Φ2.3), and (Dentium)-were grouped by implant diameter. A static load test was conducted with 5 specimens for each group using a universal testing machine to measure the ultimate failure load (UFL). With 80% of the UFL in the weakest group, the starting load for a cyclic load test was determined and the test was performed with 8 specimens for each group. All tests were conducted according to ISO14801 (2007) until implant failure occurred. After dynamically loaded, each specimen was sectioned and stereo-microscopically examined. The failure modes of each implant system were classified. Static and cyclic load test data were respectively analyzed after the test of normality, with the level of significance at P = 0.05. RESULTS In the static load test, the higher maximum load of the standard-diameter implant was significant compared with the recorded narrow or mini-implants (P < 0.05). The yield strengths of the Φ2.8 and Φ3.1 implants were significantly greater than that of the Φ2.3 implant (P < 0.05). In a cyclic load test, the mean number of cycles until implant failure occurred was recorded for each specimen. The value for the Φ4.0 implant was significantly greater (P < 0.001). CONCLUSION Implant diameter has an effect on the ability to withstand both static and cyclic loads within Dentium implant systems, The UFLs and fatigue cycles decreased as the implants diameter became smaller.
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Herrmann J, Hentschel A, Glauche I, Vollmer A, Schlegel KA, Lutz R. Implant survival and patient satisfaction of reduced diameter implants made from a titanium-zirconium alloy: A retrospective cohort study with 550 implants in 311 patients. J Craniomaxillofac Surg 2016; 44:1940-1944. [PMID: 27765553 DOI: 10.1016/j.jcms.2016.09.007] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2016] [Revised: 08/11/2016] [Accepted: 09/19/2016] [Indexed: 11/29/2022] Open
Abstract
The aim of the study was to evaluate implant survival of reduced-diameter implants compared to regular-diameter implants. A retrospective evaluation of 154 Straumann Bone Level Roxolid® implants (diameter 3.3 mm) with SLActive®-surface in 107 patients, which were inserted between 2009 and 2010 in private practice, was performed. The mean observation period was 22.4 ± 8.2 months. 396 Straumann SLActive® implants (4.1 mm and 4.8 mm) in 204 patients, with an observation period of 28.4 ± 10.1 months served as control group. Implant survival rate, resonance frequency analysis and patient satisfaction were evaluated. The implant survival rate was 97.4% in the test vs. 98.5% in the control group. Resonance frequency analysis showed statistically significant lower values for the reduced-diameter implants. Patient satisfaction showed no significant difference between the test and the control group. Reduced-diameter implants displayed high survival rates during the period investigated and represent a convincing treatment alternative. Long-term follow-up investigations confirmed the high implant survival rates of 96.8% (after 69.7 ± 12.3 months) in the test group and 98.5% (after 76.0 ± 13.6 months) in the control group.
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Affiliation(s)
- Jan Herrmann
- Private Practice, Lothar-Streit-Straße 10b, 08056 Zwickau, Germany; Department of Oral and Maxillofacial Surgery (Director of the Institution: Prof. Dr. med. Dr. med. dent. Dr. h.c. Friedrich Wilhelm Neukam), University Hospital Erlangen, Friedrich Alexander Universität Erlangen-Nürnberg, Östliche Stadtmauerstrasse 27, 91054 Erlangen, Germany
| | - Andreas Hentschel
- Private Practice, Lothar-Streit-Straße 10b, 08056 Zwickau, Germany; Department of Oral and Maxillofacial Surgery (Director of the Institution: Prof. Dr. med. Dr. med. dent. Dr. h.c. Friedrich Wilhelm Neukam), University Hospital Erlangen, Friedrich Alexander Universität Erlangen-Nürnberg, Östliche Stadtmauerstrasse 27, 91054 Erlangen, Germany
| | - Ingmar Glauche
- Institute for Medical Informatics and Biometry (IMB) (Director of the Institution: Prof. Dr. rer. med. Ingo Röder), Faculty of Medicine Carl Gustav Carus, Technische Universität Dresden, Fetscherstr. 74, 01307 Dresden, Germany
| | | | - Karl Andreas Schlegel
- Department of Oral and Maxillofacial Surgery (Director of the Institution: Prof. Dr. med. Dr. med. dent. Dr. h.c. Friedrich Wilhelm Neukam), University Hospital Erlangen, Friedrich Alexander Universität Erlangen-Nürnberg, Östliche Stadtmauerstrasse 27, 91054 Erlangen, Germany
| | - Rainer Lutz
- Department of Oral and Maxillofacial Surgery (Director of the Institution: Prof. Dr. med. Dr. med. dent. Dr. h.c. Friedrich Wilhelm Neukam), University Hospital Erlangen, Friedrich Alexander Universität Erlangen-Nürnberg, Östliche Stadtmauerstrasse 27, 91054 Erlangen, Germany.
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Schwindling FS, Schwindling FP. Mini dental implants retaining mandibular overdentures: A dental practice-based retrospective analysis. J Prosthodont Res 2016; 60:193-8. [PMID: 26783089 DOI: 10.1016/j.jpor.2015.12.005] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2015] [Revised: 12/11/2015] [Accepted: 12/24/2015] [Indexed: 11/25/2022]
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Temmerman A, Keestra JAJ, Coucke W, Teughels W, Quirynen M. The outcome of oral implants placed in bone with limited bucco-oral dimensions: a 3-year follow-up study. J Clin Periodontol 2015; 42:311-8. [DOI: 10.1111/jcpe.12376] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/31/2014] [Indexed: 11/26/2022]
Affiliation(s)
- Andy Temmerman
- Department of Oral Health Sciences; Section of Periodontology; KU Leuven - Catholic University of Leuven; Leuven Belgium
- Department of Periodontology; University Hospitals Leuven; Leuven Belgium
| | - Johan A. J. Keestra
- Department of Oral Health Sciences; Section of Periodontology; KU Leuven - Catholic University of Leuven; Leuven Belgium
- Department of Periodontology; University Hospitals Leuven; Leuven Belgium
| | - Wim Coucke
- Department of Clinical Biology; Scientific Institute of Public Health; Brussels Belgium
| | - Wim Teughels
- Department of Oral Health Sciences; Section of Periodontology; KU Leuven - Catholic University of Leuven; Leuven Belgium
- Department of Periodontology; University Hospitals Leuven; Leuven Belgium
| | - Marc Quirynen
- Department of Oral Health Sciences; Section of Periodontology; KU Leuven - Catholic University of Leuven; Leuven Belgium
- Department of Periodontology; University Hospitals Leuven; Leuven Belgium
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