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Hussaini S, Glogauer M, Sheikh Z, Al-Waeli H. CBCT in Dental Implantology: A Key Tool for Preventing Peri-Implantitis and Enhancing Patient Outcomes. Dent J (Basel) 2024; 12:196. [PMID: 39056983 PMCID: PMC11276053 DOI: 10.3390/dj12070196] [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: 04/02/2024] [Revised: 06/07/2024] [Accepted: 06/19/2024] [Indexed: 07/28/2024] Open
Abstract
(1) Introduction: Trust is a cornerstone of the patient-physician relationships. Unforeseen complications in the health care system could jeopardize patients' trust in their physicians. (2) Aim: This article presents a quantitative figure regarding foreseeing the necessity of a three-dimensional quantitative visualization of bone structure and concurrently preparing for an ancillary procedure by a dentist to successfully perform the surgery that could minimize unforeseen complications; (3) Materials and method: This retrospective study has been derived based on an analysis of 1134 patients who had received 4800 dental implants from January 2001 to August 2020, out of which 200 cases were randomly selected for this study. Each procedure during implant treatment was categorized as OPG (Orthopantomography) or OPG with CBCT as per all the procedures which included and were coded as follows, 1: Surgery & Restoration, 2: GBR (Guided Bone Regeneration), 3: GTR (Guided Tissue Regeneration), 4: Block Bone Graft, 5: Spreading, 6: Splitting, 7: Internal Sinus, 8: External Sinus, 9: PRF (Platelet Rich Fibrin). Any of the 200 cases in which implant placement could not have been performed for reasons related to a lack of CBCT were selected for this study. The surgery was aborted halfway through without implant placement in these cases due to a lack of bone quantity and/or lack of primary stability. These cases were registered for re-evaluation and statistical analysis; (4) Results: 7% of the cases that used OPG alone led the surgeon to unexpectedly abort in the middle of the surgery without implant placement. All (100%) of the patients who had CBCT during treatment planning were able to receive implants during the surgery. None of the patients left the surgery without receiving implants if CBCT was used (0%); (5) Discussion: Radiographic image quality is defined as the amount of information within the image that allows the radiologist to make a diagnostic decision with a particular level of certainty (Martin et al., 1999) and hence the importance of CBCT. The unexpected 7% of devastating situations for patients who started surgery but did not have implant placement led to [A] aborting the surgery, [B] procedural difficulties requiring an alternative treatment plan, [C] a negative impact on the patient's behavior, and [D] wanting to change doctor due to a lack of trust; (6) Conclusion: This study indicates that in implant dentistry patients' mistrust could be avoided by 7% if CBCT is obtained. It also shows the significance of cone-beam computed tomography as an adjunct to panoramic radiography during the diagnosis and treatment planning phase. The use of panoramic radiography alone can lead to a 7% likelihood of misdiagnosis. A lack of CBCT during treatment planning negatively affects the outcome of surgical procedures.
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Affiliation(s)
- Souheil Hussaini
- Oral Implantology Research Institute, Block # 18 King Salman Bin Abdulaziz Al Saud St., Dubai 39695, United Arab Emirates;
| | - Michael Glogauer
- Department of Dental Oncology, University Health Network, Princess Margaret Cancer Hospital, 610 University Ave., Toronto, ON M5G 2M9, Canada;
- Faculty of Dentistry, University of Toronto, 124 Edward St., Toronto, ON M5G 1X3, Canada
| | - Zeeshan Sheikh
- Department of Applied Oral Sciences, Faculty of Dentistry, Dalhousie University, 5981 University Ave., Halifax, NS B3H 1W2, Canada;
- Department of Dental Clinical Sciences, Faculty of Dentistry, Dalhousie University, 5981 University Ave., Halifax, NS B3H 1W2, Canada
- Biomedical Engineering, Faculty of Medicine, Dalhousie University, 5981 University Ave., Halifax, NS B3H 1W2, Canada
| | - Haider Al-Waeli
- Department of Dental Clinical Sciences, Faculty of Dentistry, Dalhousie University, 5981 University Ave., Halifax, NS B3H 1W2, Canada
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Kim HJ, Lee SK, Kim HS, Kim WJ, Ryu JH, Ji MK, Lim HP. Atomic Layer Deposition of Zirconia on Titanium Implants Improves Osseointegration in Rabbit Bones. Int J Nanomedicine 2024; 19:5011-5020. [PMID: 38832337 PMCID: PMC11146613 DOI: 10.2147/ijn.s460392] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2024] [Accepted: 05/22/2024] [Indexed: 06/05/2024] Open
Abstract
Purpose Atomic layer deposition (ALD) is a method that can deposit zirconia uniformly on an atomic basis. The effect of deposited zirconia on titanium implants using ALD was evaluated in vivo. Methods Machined titanium implants (MTIs) were used as the Control. MTIs treated by sandblasting with large grit and acid etching (SA) and MTIs deposited with zirconia using ALD are referred to as Groups S and Z, respectively. Twelve implants were prepared for each group. Six rabbits were used as experimental animals. To evaluate the osteogenesis and osteocyte aspects around the implants, radiological and histological analyses were performed. The bone-to-implant contact (BIC) ratio was measured and statistically analyzed to evaluate the osseointegration capabilities. Results In the micro-CT analysis, more radiopaque bone tissues were observed around the implants in Groups S and Z. Histological observation found that Groups S and Z had more and denser mature bone tissues around the implants in the cortical bone area. Many new and mature bone tissues were also observed in the medullary cavity area. For the BIC ratio, Groups S and Z were significantly higher than the Control in the cortical bone area (P < 0.017), but there was no significant difference between Groups S and Z. Conclusion MTIs deposited with zirconia using ALD (Group Z) radiologically and histologically showed more mature bone formation and activated osteocytes compared with MTIs (Control). Group Z also had a significantly higher BIC ratio than the Control. Within the limitations of this study, depositing zirconia on the surface of MTIs using ALD can improve osseointegration in vivo.
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Affiliation(s)
- Hong-Joo Kim
- Department of Prosthodontics, School of Dentistry, Chonnam National University, Gwangju, Republic of Korea
| | - Seon-Ki Lee
- Department of Prosthodontics, Daejeon Dental Hospital, Wonkwang University, Daejeon, Republic of Korea
| | | | - Won-Jae Kim
- Department of Oral Physiology, School of Dentistry, Stem cell Secretome Research Center, Chonnam National University, Gwangju, Republic of Korea
| | - Je-Hwang Ryu
- Department of Pharmacology and Dental Therapeutics, School of Dentistry, Chonnam National University, Gwangju, Republic of Korea
| | - Min-Kyung Ji
- Dental 4D Research Center, Chonnam National University, Gwangju, Republic of Korea
| | - Hyun-Pil Lim
- Department of Prosthodontics, School of Dentistry, Chonnam National University, Gwangju, Republic of Korea
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Gezer P, Yilanci H. Comparison of mechanical stability of mini-screws with resorbable blasting media and micro-arc oxidation surface treatments under orthodontic forces: An in vitro biomechanical study. Int Orthod 2023; 21:100775. [PMID: 37263049 DOI: 10.1016/j.ortho.2023.100775] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2023] [Revised: 05/03/2023] [Accepted: 05/09/2023] [Indexed: 06/03/2023]
Abstract
INTRODUCTION The aim of this study was to compare the primary stability of mini-screws with different surface treatments such as resorbable blasting media (RBM) and micro-arc oxidation (MAO) under in vitro orthodontic forces. MATERIAL AND METHODS Thirty-six self-drilling TiAl6V4-ELI grade 23 titanium alloy 1.6×8mm mini-screws were inserted into polyurethane foam blocks and divided into three groups according to surface properties: machine surface (MS), RBM-treated, and MAO-treated. An orthodontic force of 150g was applied to the mini-screws using NiTi coils. Maximum insertion torque (MIT) and maximum removal torque (MRT) were measured with a digital torque screwdriver during insertion and removal. For each mini-screw, stability measurements were made with the Periotest M device at day 0 and weeks 1, 2, 4, 8, and 12. RESULTS Significant differences in MIT were observed between all groups in pairwise comparisons (P<0.001) with the highest value in the MAO-treated group and the lowest in the MS group. The mean MRT values differed in all three groups (P=0.001). In pairwise comparisons of MRT, only the difference between MS group and RBM-treated group was significant. The highest value was observed in the RBM-treated group, while the lowest value was observed in the MS group. Periotest values were significantly higher in the MAO-treated group than the RBM-treated group at weeks 8 and 12. A positive significant correlation was found between MIT and MRT in all groups. No significant correlation was found between MIT, MRT and Periotest values in all groups. CONCLUSION RBM-treated group was significantly higher than the MS group in MIT and MRT values. According to Periotest values, RBM-treated group was found to be significantly more stable than the MAO-treated group at weeks 8 and 12. Therefore, RBM surface treatment was found to be more favourable than other surfaces to increase success rate in clinical applications.
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Affiliation(s)
- Pınar Gezer
- Department of Orthodontics, Faculty of Dentistry, Institute of Health Sciences, Istanbul Medipol University, Istanbul, Turkey.
| | - Hilal Yilanci
- Department of Orthodontics, Faculty of Dentistry, Institute of Health Sciences, Istanbul Medipol University, Istanbul, Turkey
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Wach T, Hadrowicz P, Trybek G, Michcik A, Kozakiewicz M. Is Corticalization in Radiographs Related to a Higher Risk of Bone Loss around Dental Implants in Smoking Patients? A 5-Year Observation of Radiograph Bone-Texture Changes. J Clin Med 2023; 12:5351. [PMID: 37629393 PMCID: PMC10456057 DOI: 10.3390/jcm12165351] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Revised: 07/20/2023] [Accepted: 07/28/2023] [Indexed: 08/27/2023] Open
Abstract
BACKGROUND Currently, the topic of dental implants is widely researched. However, still compromising are the factors that can affect implant loss as a consequence of marginal bone loss. One of the factors is smoking, which has a devastating effect on human health and bone structure. Oral health and jaw condition are also negatively affected by smoking. The aim of this study was to evaluate the peri-implant jawbone corticalization phenomenon in tobacco smokers. METHODS A total of 2196 samples from 768 patients with an implant in the neck area were checked, and texture features were analyzed. The corticalization phenomenon was investigated. All analyses were performed in MaZda Software. The influence of corticalization was investigated as a factor on bone structure near the implant neck. The statistical analysis included a feature distribution evaluation, mean (t-test) or median (W-test) comparison, analysis of regression and one-way analysis of variance or Kruskal-Wallis test as no normal distribution or between-group variance was indicated for the significant differences in the investigated groups. Detected differences or relationships were assumed to be statistically significant when p < 0.05. RESULTS The research revealed that MBL was correlated with smoking after 5 years (0.42 mm ± 1.32 mm 0 mm ± 1.25 mm), the Corticalization Index was higher in the smoker group on the day of surgery, and it became higher after 5y of observation (185.98 ± 90.8 and 243.17 ± 155.47). The implant-loss frequency was higher in the group of smokers, too, compared to non-smokers (6.74% and 2.87%). The higher the torque value during the implant placement, the higher the Corticalization Phenomenon Index. CONCLUSIONS The research revealed a correlation between smoking and changes in bone structure in radio textures near the implants. The corticalization phenomenon is important, may be detected immediately after implant placement and may be one of the indicators of the implant success rate.
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Affiliation(s)
- Tomasz Wach
- Department of Maxillofacial Surgery, Medical University of Lodz, 113 Żeromskiego Str., 90-549 Lodz, Poland;
| | - Piotr Hadrowicz
- Department of Otolaryngology, Hospital in Sosnowiec, Zegadłowicza 3, 41-200 Sosnowiec, Poland;
| | - Grzegorz Trybek
- Department of Oral Surgery, Pomeranian Medical University in Szczecin, 70-111 Szczecin, Poland;
- 4th Military Clinical Hospital in Wroclaw, ul. Rudolfa Weigla 5, 50-981 Wroclaw, Poland
| | - Adam Michcik
- Department of Maxillofacial Surgery, Medical University of Gdansk, 80-210 Gdańsk, Poland;
| | - Marcin Kozakiewicz
- Department of Maxillofacial Surgery, Medical University of Lodz, 113 Żeromskiego Str., 90-549 Lodz, Poland;
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Wu V, Schulten EAJM, Helder MN, Ten Bruggenkate CM, Bravenboer N, Klein-Nulend J. Bone vitality and vascularization of mandibular and maxillary bone grafts in maxillary sinus floor elevation: A retrospective cohort study. Clin Implant Dent Relat Res 2023; 25:141-151. [PMID: 36214357 PMCID: PMC10092303 DOI: 10.1111/cid.13142] [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: 06/17/2022] [Revised: 09/19/2022] [Accepted: 09/26/2022] [Indexed: 11/30/2022]
Abstract
OBJECTIVES Mandibular retromolar (predominantly cortical) and maxillary tuberosity (predominantly cancellous) bone grafts are used in patients undergoing maxillary sinus floor elevation (MSFE) for dental implant placement. The aim of this retrospective cohort study was to investigate whether differences exist in bone formation and vascularization after grafting with either bone source in patients undergoing MSFE. METHODS Fifteen patients undergoing MSFE were treated with retromolar (n = 9) or tuberosity (n = 6) bone grafts. Biopsies were taken 4 months postoperatively prior to dental implant placement, and histomorphometrically analyzed to quantify bone and osteoid area, number of total, apoptotic, and receptor activator of nuclear factor-κB ligand (RANKL)-positive osteocytes, small and large-sized blood vessels, and osteoclasts. The grafted area was divided in three regions (caudal-cranial): RI, RII, and RIII. RESULTS Bone volume was 40% (RII, RIII) higher and osteoid volume 10% (RII) lower in retromolar compared to tuberosity-grafted areas. Total osteocyte number and number of RANKL-positive osteocytes were 23% (RII) and 90% (RI, RII) lower, but osteoclast number was higher (retromolar: 12, tuberosity: 0) in retromolar-grafted areas. The total number of blood vessels was 80% (RI) to 60% (RIII) lower, while the percentage of large-sized blood vessels was 86% (RI) to 25% (RIII) higher in retromolar-grafted areas. Number of osteocyte lacunae and apoptotic osteocytes were similar in both bone grafts used. CONCLUSIONS Compared to the retromolar bone, tuberosity bone showed increased bone vitality and vascularization in patients undergoing MSFE, likely due to faster bone remodeling or earlier start of new bone formation. Therefore, tuberosity bone grafts might perform better in enhancing bone regeneration.
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Affiliation(s)
- Vivian Wu
- Department of Oral Cell Biology, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam Movement Sciences, Amsterdam, The Netherlands.,Department of Oral and Maxillofacial Surgery/Oral Pathology, Amsterdam UMC and Academic Centre for Dentistry Amsterdam (ACTA), Vrije Universiteit Amsterdam, Amsterdam Movement Sciences, Amsterdam, The Netherlands
| | - Engelbert A J M Schulten
- Department of Oral and Maxillofacial Surgery/Oral Pathology, Amsterdam UMC and Academic Centre for Dentistry Amsterdam (ACTA), Vrije Universiteit Amsterdam, Amsterdam Movement Sciences, Amsterdam, The Netherlands
| | - Marco N Helder
- Department of Oral and Maxillofacial Surgery/Oral Pathology, Amsterdam UMC and Academic Centre for Dentistry Amsterdam (ACTA), Vrije Universiteit Amsterdam, Amsterdam Movement Sciences, Amsterdam, The Netherlands
| | - Christiaan M Ten Bruggenkate
- Department of Oral and Maxillofacial Surgery/Oral Pathology, Amsterdam UMC and Academic Centre for Dentistry Amsterdam (ACTA), Vrije Universiteit Amsterdam, Amsterdam Movement Sciences, Amsterdam, The Netherlands
| | - Nathalie Bravenboer
- Department of Clinical Chemistry, Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam Movement Sciences, Amsterdam, The Netherlands
| | - Jenneke Klein-Nulend
- Department of Oral Cell Biology, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam Movement Sciences, Amsterdam, The Netherlands
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Bredberg C, Vu C, Häggman-Henrikson B, Chrcanovic BR. Marginal bone loss around dental implants: comparison between matched groups of bruxer and non-bruxer patients: A retrospective case-control study. Clin Implant Dent Relat Res 2023; 25:124-132. [PMID: 36411179 PMCID: PMC10099792 DOI: 10.1111/cid.13161] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2022] [Revised: 11/07/2022] [Accepted: 11/09/2022] [Indexed: 11/23/2022]
Abstract
PURPOSE To compare marginal bone loss (MBL) around dental implants in a group of bruxers in relation to a matched group of non-bruxers. METHODS The present record-based retrospective study included patients selected from individuals treated with dental implants at one specialist clinic in Malmö. Only implants not lost and with baseline radiographs taken within 12 months after implant placement and with a minimum of 36 months of radiological follow-up were considered for inclusion. Univariate linear regression models and a linear mixed-effects model were performed. RESULTS Two hundred and four patients (104 bruxers, 100 non-bruxers), with a total of 811 implants (416 in bruxers, 395 in non-bruxers) were included in the study. The results of the linear mixed-effects model suggested that bruxism, smoking, age, region of the jaws, implant diameter, and prosthesis type had a statistically significant influence on MBL over time. Individuals who are both bruxers and smokers showed greater MBL when compared to individuals who are either a bruxer or smoker, or neither (p < 0.001). CONCLUSIONS Bruxism is suggested to increase the risk of MBL over time, as well as higher age, smoking, and the combination of bruxism and smoking. Other factors that showed a correlation with increased MBL were implant diameter, region of the jaws, and prosthesis type, but it is not possible to draw robust conclusions for these factors, as the categories of these variables were very unbalanced.
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Affiliation(s)
| | - Camila Vu
- Faculty of Odontology, Malmö University, Malmö, Sweden
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Can the Immediate Implantation With Immediate Loading Achieve an Acceptable Esthetic Outcome? A Prospective Observational Clinical Study. J Craniofac Surg 2023; 34:e79-e84. [PMID: 35996220 DOI: 10.1097/scs.0000000000008876] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2022] [Accepted: 06/04/2022] [Indexed: 01/11/2023] Open
Abstract
The trending protocol in implantology aims at integrating the esthetic on par with function while reducing discomfort and treatment time with optimal results. The purpose of this study was to evaluate the pink esthetic score in sites treated by graftless instant implantation that was boosted by instant provisionalization with a 2 to 3 mm jumping distance. Thirty-five implants were inserted in the extraction sockets of teeth of 29 healthy qualified patients (22 females and 7 males) with an age range of 23 to 60 years [mean±SD age 41.11±9.9 y). Preoperative assessment was complemented clinically and radiographically for each patient. The used system was Medentika dental implant (Germany). Osstell implant stability quotient was used to measure implant stability at the time of surgery (baseline) and at 16 weeks. Four implants in 3 patients failed. The implant survival rate was 88.6%. The protocol of this study produced a significant decrease in the jumping distance which is 2 to 3 mm at cone-beam computed tomography evaluation with satisfactory esthetic outcomes clinically. Further comparative studies with long-term and larger samples are needed to confirm the conclusion of this study.
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Moraschini V, Kischinhevsky ICC, Sartoretto SC, de Almeida Barros Mourão CF, Sculean A, Calasans-Maia MD, Shibli JA. Does implant location influence the risk of peri-implantitis? Periodontol 2000 2022; 90:224-235. [PMID: 35913455 DOI: 10.1111/prd.12459] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Peri-implantitis is characterized by nonreversible and progressive loss of supporting bone and is associated with bleeding and/or suppuration on probing. Peri-implant disease is considered as the main etiologic factor related to implant failure. Peri-implant disease has a pathogenesis similar to that of periodontal disease, both being triggered by an inflammatory response to the biofilm accumulation. Although the prevalence of peri-implantitis has been evaluated by several clinical studies with different follow-ups, there are currently little data on the impact of implant location and the prevalence of peri-implantitis. The aim of this review, therefore, was to summarize the evidence concerning the prevalence of peri-implantitis in relation to implant location and associated risk predictors. Even though most studies evaluating the prevalence of peri-implantitis in relation to implant location are cross-sectional or retrospective, they suggest that the occurrence of peri-implantitis is most prevalent in the anterior regions of the maxilla and mandible. Moreover, it seems that there is a higher prevalence of peri-implantitis in the maxilla than in the mandible.
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Affiliation(s)
- Vittorio Moraschini
- Department of Periodontology, Dental Research Division, School of Dentistry, Veiga de Almeida University, Rio de Janeiro, Brazil.,Department of Oral Surgery, Dentistry School, Fluminense Federal University, Niterói, Rio de Janeiro, Brazil
| | | | - Suelen Cristina Sartoretto
- Department of Oral Surgery, Dentistry School, Fluminense Federal University, Niterói, Rio de Janeiro, Brazil
| | | | - Anton Sculean
- Department of Periodontology, School of Dental Medicine, University of Bern, Bern, Switzerland
| | - Monica Diuana Calasans-Maia
- Department of Oral Surgery, Dentistry School, Fluminense Federal University, Niterói, Rio de Janeiro, Brazil
| | - Jamil Awad Shibli
- Department of Periodontology and Oral Implantology, Dental Research Division, University of Guarulhos, São Paulo, Brazil
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Thread shape, cortical bone thickness, and magnitude and distribution of stress caused by the loading of orthodontic miniscrews: finite element analysis. Sci Rep 2022; 12:12367. [PMID: 35859046 PMCID: PMC9300621 DOI: 10.1038/s41598-022-16662-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Accepted: 07/13/2022] [Indexed: 11/16/2022] Open
Abstract
Cortical bone thickness is assumed to be a major factor regulating miniscrew stability. We investigated stress distribution in two miniscrews with different thread shapes (type A and B) and in cortical bone of three different thicknesses using three-dimensional (3D) finite element (FE) models. More specifically, 3D FE models of two different miniscrews were created and placed obliquely or vertically into a cylindrical bone model representing different cortical bone thicknesses. When force was applied to the miniscrew, the stress distribution on the screw surface and in the peri-implant bone was assessed using FE methodology. Miniscrew safety was evaluated using a modified Soderberg safety factor. Screw head displacement increased with a decrease in cortical bone thickness, irrespective of screw type. The smallest minimum principal stresses on the screw surfaces remained constant in type A miniscrews on changes in cortical bone thickness. Minimum principal stresses also appeared on the cortical bone surface. Lower absolute values of minimum principal stresses were seen in type A miniscrews when placed vertically and with upward traction in obliquely placed type B miniscrews. Both miniscrews had acceptable safety factor values. Taken together, orthodontists should select and use the suitable miniscrew for each patient in consideration of bone properties.
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Vasovic M, Jovanovic L, Djordjevic A. Bone Quality Assessment of Dental Implant Recipient Sites. SERBIAN JOURNAL OF EXPERIMENTAL AND CLINICAL RESEARCH 2022. [DOI: 10.1515/sjecr-2015-0052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Abstract
The term bone quality is not clearly defined and depends on many factors, such as bone density, bone vascularity, bone metabolism and other factors that may affect implant outcome. The assessment of bone volume and bone density is most common in planning the treatment of dental implants. Bone quality is an important predictor of primary implant stability, which influences the future implant osseointegration. Numerous classifications have been described for the evaluation of bone density. The most commonly used has been the one proposed by Lekholmu and Zarb. For the objective evaluation of bone density, conventional computed tomography (CT) or Cone Beam Computed tomography (CBCT), have been proposed. Both methods are reliable for the measurement of bone density, but preference is given to CBCT, due to the lower radiation doses, greater comfort for the patient and the lower prices. Pre-operatively defined bone density is a good indicator of the future success of implant therapy. In addition to the bone density, vascularity of the jawbone is an important factor of the quality of the bone for the osseointegration of dental implants. Laser Doppler is a simple method that can determine the vascularity of bone during implant insertion. The development of modern diagnostic methods for assessing the quantity and quality of the jawbone has enabled easier implant planning and has provided a secure outcome.
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Affiliation(s)
| | - Lena Jovanovic
- Faculty of Medical Sciences , University of Kragujevac , Serbia
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11
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Chaar MS, Naguib AA, Abd Alsamad AM, Ahmed DF, Abdel Nabi N, Kern M. Vascular and neurosensory evaluation in relation to lingual canal anatomy after mandibular midline implant installation in edentulous patients. Clin Oral Investig 2022; 26:3311-3323. [PMID: 34985576 PMCID: PMC8898232 DOI: 10.1007/s00784-021-04312-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2021] [Accepted: 11/20/2021] [Indexed: 11/24/2022]
Abstract
Objectives The aim of this study is to investigate vascular and neurosensory complications in edentulous patients following the installation of mandibular midline single implants in relation to lingual canals. Materials and methods After performing a cone beam computed tomography scan for the 50 recruited patients, the relationship between the potential implant site and the lingual canals was assessed, and all vascular and neurosensory complications were recorded. Results Six patients (12%) reported profuse bleeding during implant placement, and 13 (26%) reported transient neurosensory changes, which were resolved after 3 months. According to the virtual implant planning, 44 patients (88%) would have their implants touching the lingual canals, six of them reported vascular changes (14%), and 12 out of 44 patients reported neurosensory changes (27%). For the six patients who would have their implants not touching the lingual canals, one patient reported transient neurosensory changes. Conclusions The mandibular lingual canals are constant anatomic landmarks. Injury to the supra-spinosum lingual canals may occur during midline implant placement, depending on the implant length and the bone height. Clinical relevance Despite that injury to the supra-spinosum lingual canals during implant insertion does not result in permanent vascular or neurosensory complications, caution is required to avoid the perforation of the lingual cortices.
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Affiliation(s)
- Mohamed Sad Chaar
- Department of Prosthodontics, Propaedeutic and Dental Materials, School of Dentistry, Christian-Albrechts University, Kiel, Germany.
| | - Amr Ahmed Naguib
- Department of Removable Prosthodontics, Faculty of Dentistry, Cairo University, Cairo, Egypt
| | - Ahmed Mohamed Abd Alsamad
- Department of Oral and Maxillofacial Radiology, Faculty of Dentistry, Cairo University, Cairo, Egypt
| | - Dina Fahim Ahmed
- Department of Oral and Maxillofacial Radiology, Faculty of Dentistry, Cairo University, Cairo, Egypt
| | - Nouran Abdel Nabi
- Department of Removable Prosthodontics, Faculty of Dentistry, Cairo University, Cairo, Egypt
| | - Matthias Kern
- Department of Prosthodontics, Propaedeutic and Dental Materials, School of Dentistry, Christian-Albrechts University, Kiel, Germany
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Ketabi M, Ayubianmarkazi N, Deporter D, Dastgurdi M, Akhondi N. Long-term results of immediate implantation in mandibular posterior teeth with early loading: A retrospective case series. Dent Res J (Isfahan) 2022. [DOI: 10.4103/1735-3327.353835] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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13
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Naishlos S, Zenziper E, Zelikman H, Nissan J, Mizrahi S, Chaushu G, Matalon S, Chaushu L. Esthetic Assessment Succeeding Anterior Atrophic Maxilla Augmentation with Cancellous Bone-Block Allograft and Late Restoration Loading. J Clin Med 2021; 10:jcm10204635. [PMID: 34682757 PMCID: PMC8541616 DOI: 10.3390/jcm10204635] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Revised: 10/02/2021] [Accepted: 10/05/2021] [Indexed: 11/24/2022] Open
Abstract
Background: Various conditions may lead to bony deficiency in the anterior maxilla. The present study evaluated esthetic (PES—pink esthetic score and WES—white esthetic score) results after augmentation of the anterior atrophic maxilla using cancellous bone-block allograft followed by implant placement and late (conventional) loading. Methods: Cohort study that included 33 patients with missing teeth in the upper anterior region characterized by extensive bone loss. Allogeneic cancellous bone-blocks were used for augmentation. Six months later, a dental implant was inserted. After a waiting time of an additional six-months, implant exposure and reconstruction were performed. The mean follow-up period was 62.93 ± 17.37 months (range 19–82 months). Results: The mean value of PES/WES was 17.8 ± 2.78. All patients had a PES/WES value above 12 (threshold value defined as clinically acceptable esthetics). The mean value of PES was 9.0 ± 1.79 and the mean value of WES was 8.8 ±1.84. Conclusions: Bone augmentation of the anterior atrophic maxilla using cancellous block-allograft and late loading supports achievement of a predictable esthetic result with long-term stability of soft and hard tissues around implant-supported reconstructions.
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Affiliation(s)
- Sarit Naishlos
- Department of Pedodontology, School of Dental Medicine, Tel Aviv University, Tel-Aviv 6997801, Israel;
| | - Eran Zenziper
- Department of Oral Rehabilitation, The Maurice and Gabriela Goldschleger School of Dental Medicine, Tel Aviv University, Tel-Aviv 6997801, Israel; (E.Z.); (H.Z.); (J.N.); (S.M.); (S.M.)
| | - Helena Zelikman
- Department of Oral Rehabilitation, The Maurice and Gabriela Goldschleger School of Dental Medicine, Tel Aviv University, Tel-Aviv 6997801, Israel; (E.Z.); (H.Z.); (J.N.); (S.M.); (S.M.)
| | - Joseph Nissan
- Department of Oral Rehabilitation, The Maurice and Gabriela Goldschleger School of Dental Medicine, Tel Aviv University, Tel-Aviv 6997801, Israel; (E.Z.); (H.Z.); (J.N.); (S.M.); (S.M.)
| | - Shaked Mizrahi
- Department of Oral Rehabilitation, The Maurice and Gabriela Goldschleger School of Dental Medicine, Tel Aviv University, Tel-Aviv 6997801, Israel; (E.Z.); (H.Z.); (J.N.); (S.M.); (S.M.)
| | - Gavriel Chaushu
- Department of Oral and Maxillofacial Surgery, School of Dental Medicine, Tel Aviv University, Tel-Aviv 6997801, Israel
- Correspondence:
| | - Shlomo Matalon
- Department of Oral Rehabilitation, The Maurice and Gabriela Goldschleger School of Dental Medicine, Tel Aviv University, Tel-Aviv 6997801, Israel; (E.Z.); (H.Z.); (J.N.); (S.M.); (S.M.)
| | - Liat Chaushu
- Department of Periodontology and Implant Dentistry, School of Dental Medicine, Tel Aviv University, Tel-Aviv 6997801, Israel;
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Mohamed LA, Khamis MM, El-Sharkawy AM, Fahmy RA. Evaluation of immediately loaded mandibular four vertical versus tilted posterior implants supporting fixed detachable restorations without versus with posterior cantilevers. Oral Maxillofac Surg 2021; 26:373-381. [PMID: 34455503 DOI: 10.1007/s10006-021-00993-5] [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: 02/22/2021] [Accepted: 07/21/2021] [Indexed: 10/20/2022]
Abstract
BACKGROUND Distally inclining posterior implants may be technically challenging in certain situations. The presence of a posterior cantilever can also exert unfavorable forces on supporting implants. The aim of the present study was to evaluate and compare peri-implant soft and hard tissues around 4 mandibular interforaminal implants having tilted posterior implants with posterior cantilevers, versus vertical implants, 2 in the interforaminal region and 2 in the first molar regions, without posterior cantilevers. All implants supported full-arch fixed detachable restorations opposing complete dentures. MATERIAL AND METHODS A total of 80 implants were placed flapless in the mandibles of 20 edentulous participants. Four implants were placed for every participant, who were randomly assigned into 2 equal groups. Axial group implants were vertically aligned, with 2 implants in the interforaminal area and 2 in the molar area. Tilted group implants have 2 anterior axial and 2 posterior distally inclined implants. Interim screw-retained prostheses converted from pre-existing dentures were immediately fabricated and loaded on the same day of surgery. After awaiting period of 3 months, all participants received fixed detachable metal acrylic resin definitive restorations. A follow-up protocol of 3, 6, and 12 months was scheduled to assess the modified gingival index, modified plaque index, peri-implant probing depth, implant stability, and marginal bone level and bone density changes. RESULTS No statistically significant differences (P > .05) were found in the modified gingival index, modified plaque index, peri-implant probing depth, implant stability, bone density, and marginal bone level between the axial and tilted implant groups after the 1-year follow-up period. CONCLUSION Placing 4 flapless immediately loaded implants in mandibular edentulous patients that supported full-arch fixed restorations provided high implant and prosthodontic success rates whether posterior implants were tilted with posterior cantilevers or vertically aligned without posterior cantilevers. TRIAL REGISTRATION Pan African Clinical Trial Registry database, PACTR201907776166846. Registered 3 July 2019, www.pactr.org .
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Affiliation(s)
| | - Mohamed Moataz Khamis
- Prosthodontic Department, Faculty of Dentistry, Alexandria University, Alexandria, Egypt.
| | | | - Rania Abdelaziz Fahmy
- Oral Medicine and Periodontology, Faculty of Dentistry, Alexandria University, Alexandria, Egypt
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Tomographic evaluation of the mandibular nerve in the mental region and its surgical implications: a cross-sectional study. Int J Oral Maxillofac Surg 2021; 51:398-404. [PMID: 34120793 DOI: 10.1016/j.ijom.2021.05.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2020] [Revised: 05/19/2021] [Accepted: 05/21/2021] [Indexed: 11/22/2022]
Abstract
The aim of this study was to evaluate the prevalence and length of the anterior loop (AL) of the inferior alveolar nerve, nerve emergence from the mental foramen, and prevalence of sensory disorders after implant placement in the interforaminal region. Four hundred and fifty hemimandibles (225 patients) were evaluated using cone beam computed tomography and panoramic radiographs. Information on the presence of sensory disorders was obtained from the medical records. AL prevalence was 13.6% and mean AL length was 1.25 mm. The false-negative rate for the identification of the AL using panoramic radiography was 58.6%. Straight nerve emergence from the mental foramen was the most prevalent (62.7%), followed by anterior (21.8%) and posterior (15.6%) emergence. The incidence of sensory disorders was 4.4%, and 1.1% were related to the presence of the AL. When implants were placed within the planned distance of the mental foramen or further, 1.2% had sensory problems associated with the presence of the mandibular incisive canal. In cases of distances smaller than planned, 12.9% had sensory alterations. Only five (1.1%) had the AL, with a length between 0 and 4.5 mm. However, in four cases, the planned distance was respected and, even so, there was a sensory disorder. Posterior nerve emergence from the mental foramen was associated with a higher prevalence of AL.
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Stacchi C, Troiano G, Rapani A, Lombardi T, Sentineri R, Speroni S, Berton F, Di Lenarda R. Factors influencing the prevalence of peri-implantitis in implants inserted in augmented maxillary sinuses: A multicenter cross-sectional study. J Periodontol 2020; 92:1117-1125. [PMID: 33246354 DOI: 10.1002/jper.20-0483] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Revised: 11/09/2020] [Accepted: 11/15/2020] [Indexed: 12/18/2022]
Abstract
BACKGROUND Peri-implantitis is widely recognized as a major cause of late implant failure, both in pristine and regenerated bone. The present study aims to evaluate the prevalence of peri-implantitis in implants inserted in augmented maxillary sinuses and to analyze possible risk factors. METHODS A cross-sectional study was conducted in four centers including patients who underwent lateral or transcrestal sinus augmentation and received dental implants. Clinical and anamnestic data were collected using a standardized form. Univariate and multivariate logistic regression analyses have been performed for both implant-level and patient-level variables. Subsequently, a multilevel logistic mixed-effect model was built to analyze variables correlated with the occurrence of peri-implantitis. RESULTS A total of 156 patients (61 males and 95 females; mean age: 60.9 ± 11.6 years) with 315 implants inserted into augmented maxillary sinuses with a follow-up ranging from 1 to 18 years were evaluated. Seven implants in seven patients were previously lost for peri-implantitis (2.2% and 4.5% at implant- and patient-level, respectively); 250 implants showed no signs of peri-implant diseases (79.4%), 34 implants presented mucositis (10.8%), and 24 implants exhibited peri-implantitis (7.6%). Corresponding data evaluated at patient-level were 125 (80.1%), 17 (10.9%), and 14 (9.0%), respectively. At the multilevel analysis, history of periodontitis, sinus elevation with lateral approach, and one-stage sinus floor elevation significantly correlated with the occurrence of peri-implantitis (P <0.001). CONCLUSIONS History of periodontitis confirmed its well-known role as a risk factor for peri-implant pathologies. In addition, both lateral window technique and one-stage sinus floor elevation seemed to represent significant risk factors for peri-implantitis.
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Affiliation(s)
- Claudio Stacchi
- Department of Medical, Surgical and Health Sciences, University of Trieste, Trieste, Italy
| | - Giuseppe Troiano
- Department of Clinical and Experimental Medicine, University of Foggia, Foggia, Italy
| | - Antonio Rapani
- Department of Medical, Surgical and Health Sciences, University of Trieste, Trieste, Italy
| | - Teresa Lombardi
- Department of Health Sciences, University "Magna Graecia", Catanzaro, Italy
| | | | | | - Federico Berton
- Department of Medical, Surgical and Health Sciences, University of Trieste, Trieste, Italy
| | - Roberto Di Lenarda
- Department of Medical, Surgical and Health Sciences, University of Trieste, Trieste, Italy
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Kim JH, Noh G, Hong SJ, Lee H. Biomechanical stress and microgap analysis of bone-level and tissue-level implant abutment structure according to the five different directions of occlusal loads. J Adv Prosthodont 2020; 12:316-321. [PMID: 33149853 PMCID: PMC7604240 DOI: 10.4047/jap.2020.12.5.316] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2020] [Revised: 09/15/2020] [Accepted: 09/22/2020] [Indexed: 11/11/2022] Open
Abstract
PURPOSE The stress distribution and microgap formation on an implant abutment structure was evaluated to determine the relationship between the direction of the load and the stress value. MATERIALS AND METHODS Two types of three-dimensional models for the mandibular first molar were designed: bone-level implant and tissue-level implant. Each group consisted of an implant, surrounding bone, abutment, screw, and crown. Static finite element analysis was simulated through 200 N of occlusal load and preload at five different load directions: 0, 15, 30, 45, and 60°. The von Mises stress of the abutment and implant was evaluated. Microgap formation on the implant-abutment interface was also analyzed. RESULTS The stress values in the implant were as follows: 525, 322, 561, 778, and 1150 MPa in a bone level implant, and 254, 182, 259, 364, and 436 MPa in a tissue level implant at a load direction of 0, 15, 30, 45, and 60°, respectively. For microgap formation between the implant and abutment interface, three to seven-micron gaps were observed in the bone level implant under a load at 45 and 60°. In contrast, a three-micron gap was observed in the tissue level implant under a load at only 60°. CONCLUSION The mean stress of bone-level implant showed 2.2 times higher than that of tissue-level implant. When considering the loading point of occlusal surface and the direction of load, higher stress was noted when the vector was from the center of rotation in the implant prostheses.
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Affiliation(s)
- Jae-Hoon Kim
- Department of Dental Education, Dental Research Institute, Dental and Life Science Institute, School of Dentistry, Pusan National University, Yangsan, Republic of Korea
| | - Gunwoo Noh
- School of Mechanical Engineering, Kyungpook National University, Daegu, Republic of Korea
| | - Seoung-Jin Hong
- Department of Prosthodontics, Kyung Hee University Dental Hospital, Seoul, Republic of Korea
| | - Hyeonjong Lee
- Department of Prosthodontics, Dental Research Institute, Dental and Life Science Institute, School of Dentistry, Pusan National University, Yangsan, Republic of Korea
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Song X, Li L, Gou H, Xu Y. Impact of implant location on the prevalence of peri-implantitis: A systematic review and meta- analysis. J Dent 2020; 103:103490. [PMID: 33007363 DOI: 10.1016/j.jdent.2020.103490] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Revised: 08/26/2020] [Accepted: 09/27/2020] [Indexed: 11/25/2022] Open
Abstract
OBJECTIVES To evaluate scientific evidence about the impact of implant location on the prevalence of peri-implantitis at implant level. SOURCE Databases (PubMed, Embase and Cochrane) were searched until March 2020without limitations on language or publication year. Hand searches and gray literature were also included. STUDY SELECTION Clinical studies reporting data on prevalence of peri-implantitis in anterior and posterior regions at implant level, and evaluations of implants with at least 1 year of function were selected. DATA Ten studies with a low risk of bias were included. Meta-analysis was performed to estimate the pooled risk ratio. A significantly higher prevalence of peri-implantitis in anterior region compared to posterior region was found (Risk ratio: 1.34; 95 % CI: [1.07, 1.69]; p = 0.01). Meta-regression was performed to analyze the potential influence of confounding factors by calculating p-value of the coefficient. Subjects (p = 0.827), implants (p = 0.859) and age (p = 0.656) did not significantly influence the outcome. Subgroup analysis by jaw revealed significantly higher prevalence of peri-implantitis in maxillary anterior (Risk ratio: 1.37; 95 % CI: [1.10, 1.71]; p = 0.005) and mandibular anterior (Risk ratio: 1.76; 95 % CI: [1.29, 2.42]; p = 0.0004) regions compared to maxillary posterior region. No significant difference was found between maxillary anterior and mandibular posterior (Risk ratio: 1.15; 95 % CI: [0.75, 1.75]; p = 0.53) regions. A meta-analysis was precluded between mandibular anterior and mandibular posterior regions due to high statistical heterogeneity (I 2 = 76 %). CONCLUSIONS Implants in the maxillary anterior and mandibular anterior regions had a higher prevalence of peri-implantitis compared to the maxillary posterior region. CLINICAL SIGNIFICANCE Practitioners should strictly grasp the indications for patients missing anterior teeth and make comprehensive treatment planning.
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Affiliation(s)
- Xiao Song
- Jiangsu Key Laboratory of Oral Disease, Nanjing Medical University, 136 Hanzhong Road, Nanjing 210029, China
| | - Lu Li
- Jiangsu Key Laboratory of Oral Disease, Nanjing Medical University, 136 Hanzhong Road, Nanjing 210029, China; Department of Periodontics, Affiliated Hospital of Stomatology, Nanjing Medical University, 136 Hanzhong Road, Nanjing 210029, China
| | - Huiqing Gou
- Jiangsu Key Laboratory of Oral Disease, Nanjing Medical University, 136 Hanzhong Road, Nanjing 210029, China
| | - Yan Xu
- Jiangsu Key Laboratory of Oral Disease, Nanjing Medical University, 136 Hanzhong Road, Nanjing 210029, China; Department of Periodontics, Affiliated Hospital of Stomatology, Nanjing Medical University, 136 Hanzhong Road, Nanjing 210029, China.
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Yemineni BC, Mahendra J, Nasina J, Mahendra L, Shivasubramanian L, Perika SB. Evaluation of Maximum Principal Stress, Von Mises Stress, and Deformation on Surrounding Mandibular Bone During Insertion of an Implant: A Three-Dimensional Finite Element Study. Cureus 2020; 12:e9430. [PMID: 32864255 PMCID: PMC7450897 DOI: 10.7759/cureus.9430] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
Aim The present study evaluated maximum principal stress, von Mises stress, and deformation on the mandible and surrounding structures during the insertion of an implant in various anatomical positions. Materials and Methods Finite element models of straight two-piece implants of 4.5 mm × 11.5 mm were modeled using Ansys software, v. 16.0 (Ansys, Inc., Houston, TX, USA). The mandibular model was derived through cone-beam computed tomography of a cadaveric mandible using Mimics software (Materialise NV, Leuven, Belgium). An osteotomy was performed at the first molar region, second premolar region, lateral incisor region, central incisor region, canine region, and second molar region that had varying bone densities. Implant insertion was simulated with a variable load of 1 - 180 Newton, which was applied axially downward with a rotational velocity of 30 - 120 rpm. Maximum principal stresses, von Mises stress distribution at the implant insertion site, and maximum deformation on the entire mandible were recorded during the insertion of the implants. Results Maximum principal stress was highest in the crestal area of the right first molar region and least in the middle third of the central incisor region during implant insertion. Von Mises stress in the mandible was highest in the right first molar region and the least in the lateral incisor region during implant insertion. The extent deformation was recorded on the x-axis, y-axis, and z-axis of the mandible. Deformation on the x-axis was highest at the crestal region of the canine and least for the lateral incisor. On the y-axis, deformation was highest at the symphysis region during implant insertion at the first molar region and the least at the condylar area during implant placement in the canine area. On the z-axis, the deformation was highest at the condylar region during implant insertion at the first molar region, and the least was observed in the symphysis region during implant placement in the second molar region. Conclusion When overall stress was considered, there is a direct correlation between stress and quality of bone. The highest maximum principal stress and von Mises stress were recorded during the placement of implants in posterior regions of the mandible, which suggests that the presence of dense cortical bone results in higher stress values. The maximum deformation was observed at different regions of the mandible, away from the site of implant insertion. The resultant stress and deformation exerted on the bone during placement of implants at different sites in the mandible varies, which could be detrimental factors in the longevity of the implant.
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Affiliation(s)
- Bhavan Chand Yemineni
- Dental and Oral Surgery, Alluri Sitarama Raju Academy Of Medical Sciences College and Hospital, Eluru, IND
| | - Jaideep Mahendra
- Periodontics, Meenakshi Ammal Dental College and Hospital, Chennai, IND
| | - Jigeesh Nasina
- Operations & Information Technology, ICFAI Business School (IBS) Hyderabad - Institute of Chartered Financial Analysts of India (ICFAI) Foundation for Higher Education, Hyderabad, IND
| | - Little Mahendra
- Periodontics, Maktoum Bin Hamdan Dental University College, Dubai, ARE
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Li Manni L, Lecloux G, Rompen E, Aouini W, Shapira L, Lambert F. Clinical and radiographic assessment of circular versus triangular cross‐section neck Implants in the posterior maxilla: A 1‐year randomized controlled trial. Clin Oral Implants Res 2020; 31:814-824. [DOI: 10.1111/clr.13624] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2019] [Revised: 04/30/2020] [Accepted: 05/04/2020] [Indexed: 01/11/2023]
Affiliation(s)
- Lou Li Manni
- Department of Periodontology and Oral Surgery University Hospital of Liège Liège Belgium
| | - Geoffrey Lecloux
- Department of Periodontology and Oral Surgery University Hospital of Liège Liège Belgium
| | - Eric Rompen
- Department of Periodontology and Oral Surgery University Hospital of Liège Liège Belgium
| | - Walid Aouini
- Department of Periodontology and Oral Surgery University Hospital of Liège Liège Belgium
- Department of Periodontology Faculty of Dental Medicine Monastir Tunisia
| | - Lior Shapira
- Department of Periodontology Hebrew University‐Hadassah Faculty of Dental Medicine Jerusalem Israel
| | - France Lambert
- Department of Periodontology and Oral Surgery University Hospital of Liège Liège Belgium
- Dental Biomaterials Research Unit University of Liège Liège Belgium
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Al-Almaie S, Kavarodi AM, Al Faidhi A, Alorf A, Alzahrani SA. Incidence of Neurosensory Disturbance and Success Rates of Solid-Screw Implants Placed in Conjunction with Inferior Alveolar Nerve Transposition. Ann Maxillofac Surg 2020; 10:80-87. [PMID: 32855920 PMCID: PMC7433969 DOI: 10.4103/ams.ams_160_19] [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: 07/18/2019] [Revised: 09/30/2019] [Accepted: 01/30/2020] [Indexed: 12/12/2022] Open
Abstract
Background: Implant-supported prosthetic rehabilitation of a severely atrophic posterior mandibular alveolar ridge is a real challenge. Implant placement in such situations is very difficult and implies the risk of inferior alveolar nerve (IAN) damage. Purpose: The purpose of this study is to evaluate the incidence of neurosensory disturbance and the cumulative survival of dental implants placed after the IAN transposition (IANT) procedures followed by dental implants placement. Materials and Methods: Twenty International Team for Implantology implants were placed in eight patients following unilateral IANT. In two patients, nerve transposition was performed bilaterally, and hence, a total of 10 IAN transposition surgeries were performed. Neurosensory dysfunction was objectively evaluated by using light touch test (LT), pain test (PT), and 2-point discrimination test (2-DT). In addition, patients were asked to answer a short questionnaire to investigate the individual feeling of discomfort and advantages related to this surgical technique. The mean follow-up periods were 47.1 months (range 12–78 months). Results: Neurosensory disturbance (i.e., disturbance registered by the LT, PT, and 2-DT tests) was experienced in 2 of 10 cases. The cumulative implant survival was 100%. However, at the time of data analysis (12–79 months after surgery), all patients indicated that they would go through the surgery again. Conclusion: IANT can permit the placement of implants with adequate length and good initial stabilization as used in routine sites, with the same favorable prognosis. All patients felt that they had received benefits from their new prostheses in terms of improved comfort, chewing efficiency, and esthetics.
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Affiliation(s)
- Saad Al-Almaie
- King Fahd Military Medical Complex, Dhahran, Saudi Arabia
| | | | | | - Ali Alorf
- King Fahd Military Medical Complex, Dhahran, Saudi Arabia
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Mumcu E, Dayan SÇ. Effect of Smoking and Locations of Dental Implants on Peri-Implant Parameters: 3-Year Follow-Up. Med Sci Monit 2019; 25:6104-6109. [PMID: 31414668 PMCID: PMC6707095 DOI: 10.12659/msm.916613] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2019] [Accepted: 04/26/2019] [Indexed: 12/29/2022] Open
Abstract
BACKGROUND Smoking may be a risk factor for marginal bone loss (MBL) and oral mucosal inflammation surrounding dental implants. This retrospective study evaluated the effects of smoking on dental implants in patients with fixed implant-supported prostheses over a period of 36 months following loading. MATERIAL AND METHODS We assessed 120 patients (68 women, 52 men, ages 19-74 years (mean age: 55.10 years) with 315 implants. Implants were classified according to location in the upper and lower jaws and anterior (placed between canines) or posterior (placed between pre-molars and molars) as follows: 1=maxilla anterior, 2=maxilla posterior, 3=mandible anterior, 4=mandible posterior. We also measured MBL, plaque index (PI), sulcus bleeding index (SBI), and probing depth (PD). P-values less than 0.05 were considered statistically significant. RESULTS MBL was statistically greater in smokers (P<0.001) as compared to non-smokers in both jaws. MBL did not vary significantly by location in either group (smokers: p=0.415; non-smokers: p=0.175). Mean PI and PD scores were significantly higher in smokers as compared to non-smokers (P<0.001). A positive correlation was found between PI and PD scores in both groups. No statistically significant difference in SBI was observed between the 2 groups (P>0.05). CONCLUSIONS Smoking was associated with increases in marginal bone loss around implants, independent of their location in the jaws. Also, both plaque indices and probing depths were greater in smokers than in non-smokers.
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Affiliation(s)
- Emre Mumcu
- Department of Prosthodontics, Faculty of Dentistry, Eskisehir Osmangazi University, Eskisehir, Turkey
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Pan CY, Liu PH, Tseng YC, Chou ST, Wu CY, Chang HP. Effects of cortical bone thickness and trabecular bone density on primary stability of orthodontic mini-implants. J Dent Sci 2019; 14:383-388. [PMID: 31890126 PMCID: PMC6921117 DOI: 10.1016/j.jds.2019.06.002] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2019] [Revised: 06/13/2019] [Indexed: 11/18/2022] Open
Abstract
Background/purpose Mini-implant screws are now routinely used as anchorage devices in orthodontic treatments. This study used synthetic bone models to investigate how the primary stability of an orthodontic mini-implant (OMI) as measured by resonance frequency (RF) is affected by varying cortical bone thickness and trabecular bone density. Materials and methods Three synthetic cortical shells (thicknesses of 1, 2, and 3 mm) and three polyurethane foam blocks (densities of 40, 20, and 10 pound/cubic foot) were used to represent jawbones of varying cortical bone thicknesses and varying trabecular bone densities. Twenty-five stainless steel OMIs (2 × 10 mm) were sequentially inserted into artificial bone blocks to depths of 2, 4, and 6 mm. Five experimental groups of bone blocks with OMIs were examined by Implomates® RF analyzer. Statistical and correlation analyses were performed by Kruskal-Wallis test, Wilcoxon rank-sum test, and simple linear regression. Results As trabecular bone density decreased, RF decreased; as cortical bone thickness decreased, RF also decreased. Simple linear regression analysis showed highly linear correlations between trabecular bone density and RF (R2 > 0.99; P < 0.0001) and between cortical bone thickness and RF (R2 > 0.98; P < 0.0001). Conclusion The stability of an OMI at the time of placement is influenced by both cortical bone thickness and trabecular bone density. Both cortical bone thickness and trabecular bone density have strong linear correlations with RF.
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Affiliation(s)
- Chin-Yun Pan
- School of Dentistry and Graduate Program of Dental Science (Orthodontics), College of Dental Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
- Department of Orthodontics, Faculty of Dentistry, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan
| | - Pao-Hsin Liu
- Department of Biomedical Engineering, I-Shou University (Medical Campus), Kaohsiung, Taiwan
| | - Yu-Chuan Tseng
- School of Dentistry and Graduate Program of Dental Science (Orthodontics), College of Dental Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
- Department of Orthodontics, Faculty of Dentistry, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan
| | - Szu-Ting Chou
- School of Dentistry and Graduate Program of Dental Science (Orthodontics), College of Dental Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
- Department of Orthodontics, Faculty of Dentistry, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan
| | - Chao-Yi Wu
- School of Dentistry and Graduate Program of Dental Science (Orthodontics), College of Dental Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
- Department of Orthodontics, Faculty of Dentistry, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan
| | - Hong-Po Chang
- School of Dentistry and Graduate Program of Dental Science (Orthodontics), College of Dental Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
- Department of Dentistry (Orthodontics), Kaohsiung Municipal Hsiao-Kang Hospital, Kaohsiung, Taiwan
- Corresponding author. School of Dentistry, Kaohsiung Medical University, 100 Shih-Chuan 1st Road, San-Min District, Kaohsiung, 80708, Taiwan.
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Demenko V, Linetskiy I, Linetska L, Yefremov O. Load-carrying capacity of short implants in edentulous posterior maxilla: A finite element study. Med Eng Phys 2019; 71:30-37. [PMID: 31285136 DOI: 10.1016/j.medengphy.2019.02.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2018] [Revised: 12/12/2018] [Accepted: 02/10/2019] [Indexed: 10/26/2022]
Abstract
Dental implant dimensions, and bone quality and quantity play a key role in early osseointegration and long-term prognosis in posterior edentulous maxilla. Treatment with short implants, preferably in a bicortical manner, is an accepted modality; however, short implants have limitations leading to increased stress concentrations in alveolar bone, potential overload and implant failure. Implant models of 3.3, 4.1, 4.8 and 5.4 mm diameter and 4.5, 5.5, 6.5, 7.5 and 8.5 mm length were placed in posterior maxilla 3-D models with corresponding residual bone heights. Bone-implant assemblies were analyzed in finite element software ANSYS 15. All materials were assumed to be linearly elastic and isotropic. 118.2 N oblique loading was applied to investigate stress distributions in bone tissues. The concept of ultimate functional load (UFL) was selected as a criterion to compare load-carrying capacity of implants and to evaluate the influence of available bone height and implant dimensions on load-carrying capacity. For all implants, UFL was calculated by limiting von Mises stresses in cortical or cancellous bone with bone strength (100 MPa for cortical and 2 MPa for cancellous bone). Implant load-carrying capacity depends on diameter and available bone height. Wide implants have higher load-carrying capacity than narrow implants. Short implants with proper diameter and length avoid bone overstress, even in Type IV bone.
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Affiliation(s)
- Vladislav Demenko
- Department of Aircraft Strength, National Aerospace University, Chkalova 17, 61070 Kharkov, Ukraine
| | - Igor Linetskiy
- Department of Oral and Maxillofacial Surgery, 1st Faculty of Medicine, Charles University in Prague, U Nemocnice 2, 12000 Prague, Czechia.
| | - Larysa Linetska
- Department of Rehabilitation Medicine, National Academy of Postgraduate Medical Education, Amosova 58, 61000 Kharkov, Ukraine
| | - Oleg Yefremov
- Department of Aircraft Strength, National Aerospace University, Chkalova 17, 61070 Kharkov, Ukraine
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Ha SR, Park HS, Kim EH, Kim HK, Yang JY, Heo J, Yeo ISL. A pilot study using machine learning methods about factors influencing prognosis of dental implants. J Adv Prosthodont 2018; 10:395-400. [PMID: 30584467 PMCID: PMC6302082 DOI: 10.4047/jap.2018.10.6.395] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2017] [Revised: 09/12/2017] [Accepted: 09/17/2017] [Indexed: 12/15/2022] Open
Abstract
PURPOSE This study tried to find the most significant factors predicting implant prognosis using machine learning methods. MATERIALS AND METHODS The data used in this study was based on a systematic search of chart files at Seoul National University Bundang Hospital for one year. In this period, oral and maxillofacial surgeons inserted 667 implants in 198 patients after consultation with a prosthodontist. The traditional statistical methods were inappropriate in this study, which analyzed the data of a small sample size to find a factor affecting the prognosis. The machine learning methods were used in this study, since these methods have analyzing power for a small sample size and are able to find a new factor that has been unknown to have an effect on the result. A decision tree model and a support vector machine were used for the analysis. RESULTS The results identified mesio-distal position of the inserted implant as the most significant factor determining its prognosis. Both of the machine learning methods, the decision tree model and support vector machine, yielded the similar results. CONCLUSION Dental clinicians should be careful in locating implants in the patient's mouths, especially mesio-distally, to minimize the negative complications against implant survival.
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Affiliation(s)
- Seung-Ryong Ha
- Department of Prosthodontics, Dankook University College of Dentistry Jukjeon Dental Hospital, Yongin, Republic of Korea
| | - Hyun Sung Park
- Private Practice, The Seoul Dental Clinic, Seongnam, Republic of Korea
| | - Eung-Hee Kim
- Biomedical Knowledge Engineering Lab., Seoul National University School of Dentistry, Seoul, Republic of Korea
| | - Hong-Ki Kim
- Dental Research Institute, Seoul National University School of Dentistry, Seoul, Republic of Korea
| | - Jin-Yong Yang
- Private Practice, Yang's Dental Clinic, Seoul, Republic of Korea
| | - Junyoung Heo
- Department of IT Engineering, Hansung University, Seoul, Republic of Korea
| | - In-Sung Luke Yeo
- Department of Prosthodontics and Dental Research Institute, Seoul National University School of Dentistry, Seoul, Republic of Korea
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Heyman O, Koren N, Mizraji G, Capucha T, Wald S, Nassar M, Tabib Y, Shapira L, Hovav AH, Wilensky A. Impaired Differentiation of Langerhans Cells in the Murine Oral Epithelium Adjacent to Titanium Dental Implants. Front Immunol 2018; 9:1712. [PMID: 30158922 PMCID: PMC6103475 DOI: 10.3389/fimmu.2018.01712] [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: 04/26/2018] [Accepted: 07/12/2018] [Indexed: 11/13/2022] Open
Abstract
Peri-implantitis is a destructive inflammatory process affecting tissues surrounding dental implants and it is considered a new global health concern. Human studies have suggested that the frequencies of Langerhans cells (LCs), the main antigen-presenting cells (APCs) of the oral epithelium, are dysregulated around the implants. Since LCs play a role in regulating oral mucosal homeostasis, we studied the impact of dental titanium implants on LC differentiation using a novel murine model. We demonstrate that whereas the percentage of LC precursors (CD11c+MHCII+) increased in the peri-implant epithelium, the frequencies of LCs (CD11c+MHCII+EpCAM+langerin+) were significantly reduced. Instead, a population of partially developed LCs expressing CD11c+MHCII+EpCAM+ but not langerin evolved in the peri-implant mucosa, which was also accompanied by a considerable leukocyte infiltrate. In line with the increased levels of LC precursors, expression of CCL2 and CCL20, chemokines mediating their translocation to the epithelium, was elevated in the peri-implant epithelium. However, expression of TGF-β1, the major cytokine driving final differentiation of LCs, was reduced in the epithelium. Further analysis revealed that while the expression of the TGF-β1 canonical receptor activing-like kinase (ALK)5 was upregulated, expression of its non-canonical receptor ALK3 was decreased. Since titanium ions releasing from implants were proposed to alter APC function, we next analyzed the impact of such ions on TGF-β1-induced LC differentiation cultures. Concurring with the in vivo studies, the presence of titanium ions resulted in the generation of partially developed LCs that express CD11c+MHCII+EpCAM+ but failed to upregulate langerin expression. Collectively, these findings suggest that titanium dental implants have the capacity to impair the development of oral LCs and might subsequently dysregulate immunity in the peri-implant mucosa.
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Affiliation(s)
- Oded Heyman
- Department of Periodontology, Faculty of Dental Medicine, Hebrew University-Hadassah Medical Center, Jerusalem, Israel
| | - Noam Koren
- Faculty of Dental Medicine, The Institute of Dental Sciences, Hebrew University, Jerusalem, Israel
| | - Gabriel Mizraji
- Department of Periodontology, Faculty of Dental Medicine, Hebrew University-Hadassah Medical Center, Jerusalem, Israel.,Faculty of Dental Medicine, The Institute of Dental Sciences, Hebrew University, Jerusalem, Israel
| | - Tal Capucha
- Faculty of Dental Medicine, The Institute of Dental Sciences, Hebrew University, Jerusalem, Israel
| | - Sharon Wald
- Faculty of Dental Medicine, The Institute of Dental Sciences, Hebrew University, Jerusalem, Israel
| | - Maria Nassar
- Faculty of Dental Medicine, The Institute of Dental Sciences, Hebrew University, Jerusalem, Israel
| | - Yaara Tabib
- Faculty of Dental Medicine, The Institute of Dental Sciences, Hebrew University, Jerusalem, Israel
| | - Lior Shapira
- Department of Periodontology, Faculty of Dental Medicine, Hebrew University-Hadassah Medical Center, Jerusalem, Israel
| | - Avi-Hai Hovav
- Faculty of Dental Medicine, The Institute of Dental Sciences, Hebrew University, Jerusalem, Israel
| | - Asaf Wilensky
- Department of Periodontology, Faculty of Dental Medicine, Hebrew University-Hadassah Medical Center, Jerusalem, Israel
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Marinescu Gava M, Suomalainen A, Vehmas T, Ventä I. Did malpractice claims for failed dental implants decrease after introduction of CBCT in Finland? Clin Oral Investig 2018; 23:399-404. [DOI: 10.1007/s00784-018-2448-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2018] [Accepted: 04/12/2018] [Indexed: 10/17/2022]
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ElHoussiney AG, Zhang H, Song J, Ji P, Wang L, Yang S. Influence of implant location on the clinical outcomes of implant abutments: a systematic review and meta-analysis. Clin Cosmet Investig Dent 2018. [PMID: 29520162 PMCID: PMC5834166 DOI: 10.2147/ccide.s143910] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Purpose To compare the failure events and incidence of complications of different abutment materials in anterior and posterior regions. Failure was defined as complete loss of the abutment requiring replacement by a new abutment. Materials and methods Electronic searches using PubMed/Medline and Google Scholar complemented with manual searches were performed with specific search terms. Searches were restricted to publications in English between January 2006 and March 2016. Results A total of 863 and 1,264 implants were inserted in the anterior and posterior regions, respectively, in a total of 1,529 patients. No titanium abutments failed in anterior or posterior regions. On the other hand, 1.6% of zirconia abutments failed in the anterior region and 1.5% failed in the posterior region. Technical complications occurred mostly in the posterior region and mostly involved zirconia abutment. Meta-analysis was possible only for zirconia-abutment failure, due to considerable heterogeneity of studies and outcome variables. No significant difference in failure rate was found between anterior and posterior zirconia abutments (risk ratio 1.53, 95% CI 0.49–4.77; P=0.47). Conclusion This systematic review and meta-analysis showed similar outcomes of different abutment materials when used in anterior and posterior regions in terms of failure events and biological and aesthetic complications. The only significant finding was the increased incidence of technical complications in the posterior region, mostly involving zirconia abutments. Abutment-screw loosening was the most common technical complication.
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Affiliation(s)
| | - He Zhang
- Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences, Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, College of Stomatology, Chongqing Medical University, Chongqing, China
| | - Jinlin Song
- Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences, Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, College of Stomatology, Chongqing Medical University, Chongqing, China
| | - Ping Ji
- Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences, Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, College of Stomatology, Chongqing Medical University, Chongqing, China
| | - Lu Wang
- Department of Prosthodontics
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Anterior Mandibular Lingual Defect As a Possible Cause of Near-Fatal Bleeding During Routine Dental Implant Surgery: A Retrospective Computed Tomography Study. IMPLANT DENT 2018; 27:254-259. [PMID: 29373335 DOI: 10.1097/id.0000000000000728] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
INTRODUCTION The anterior mandible is generally regarded as a safe anatomical region for implant placement. However, anatomical variations may lead to severe intraoperative complications with potential fatal outcome. The objective of this study was to evaluate the anterior mandibular lingual defect (AMLD) in patients undergoing implant surgery. MATERIALS AND METHODS The CT data of 338 consecutive dental implant patients were reformatted with appropriate software. The AMLDs were first identified using 3-D reconstruction and further evaluated in the relevant 2-D slices. RESULTS The AMLD was present in 10.95% of patients; of these, 83.8% were present bilaterally. No significant differences were found between sex, age, or race within the investigated population with regards to the presence of the AMLD. CONCLUSIONS The presence of an AMLD might be a possible cause of near-fatal bleeding during routine dental implant surgery. This study found the presence of the AMLD in a small (10.95%), but not negligible number of patients. To avoid possible complications, meticulous planning and the use of 3-D imaging are advisable before performing implant surgery in this anatomical region.
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30
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Hingsammer L, Watzek G, Pommer B. The influence of crown-to-implant ratio on marginal bone levels around splinted short dental implants: A radiological and clincial short term analysis. Clin Implant Dent Relat Res 2017; 19:1090-1098. [PMID: 29024303 DOI: 10.1111/cid.12546] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2017] [Revised: 08/06/2017] [Accepted: 09/15/2017] [Indexed: 12/21/2022]
Abstract
BACKGROUND The amount of marginal bone resorption around dental implants is considered to have a significant impact on implant stability as well as implant survival rates. PURPOSE The aim of this prospective study was to investigate the influence of prosthetic as well as patient specific factors on marginal bone loss around short dental implants. MATERIALS AND METHODS Seventy-six implants, which supported splinted crowns were included for investigation. All implants were from the same type and had an intraosseous length of 6.5 mm and a diameter of 4.0 mm. Twenty implants were additionally splinted onto longer ones. Measurements of marginal bone loss were performed at a mean of 12.38 months after prosthetic loading and the mean follow-up for clinical evaluation was 20.52 months. RESULTS Overall two implant failures were recorded, revealing a survival rate of 97.3%. Marginal bone resorption around 72 short implants measured 0.71 mm (SD: 0.74 mm) and was found to have a strong correlation with calculated Crown-to-Implant ratio (r = .71; P < .001). Age, gender, insertion torque, implant surface area, location, position, bone quality, and insertion torque did not influence peri-implant bone loss after one year of loading. CONCLUSION Within the limitations of the study, it is suggested that Crown-to-Implant ratios should not exceed 1.7 to avoid increased early marginal bone loss.
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Affiliation(s)
- Lukas Hingsammer
- University Hsopital Zurich, Department of Oral and Maxillofacial Surgery, Frauenklinikstrasse 24, 8032 Zurich, Switzerland.,Oral Surgeon, Academy of Oral Implantology, Lazarettgasse 19/DG, 1090 Vienna, Austria
| | - Georg Watzek
- Oral Surgeon, Academy of Oral Implantology, Lazarettgasse 19/DG, 1090 Vienna, Austria
| | - Bernhard Pommer
- Oral Surgeon, Academy of Oral Implantology, Lazarettgasse 19/DG, 1090 Vienna, Austria
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31
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Vertical and Horizontal Crestal Bone Levels in Root-Analog Stepped Implants—A 10-Year Prospective Study. IMPLANT DENT 2017; 26:524-531. [DOI: 10.1097/id.0000000000000598] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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32
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Abduljabbar T, Javed F, Malignaggi VR, Vohra F, Kellesarian SV. Influence of implant location in patients with and without type 2 diabetes mellitus: 2-year follow-up. Int J Oral Maxillofac Surg 2017; 46:1188-1192. [PMID: 28499506 DOI: 10.1016/j.ijom.2017.04.015] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2016] [Revised: 02/12/2017] [Accepted: 04/18/2017] [Indexed: 11/28/2022]
Abstract
The aim of the present cross-sectional retrospective 2-year follow-up clinical study was to assess the influence of implant location on clinical and radiographic parameters around dental implants placed in patients with and without type 2 diabetes mellitus (T2DM). Twenty-seven patients with T2DM and 25 non-diabetic controls were included. Implants were classified into three zones according to their location: (1) anterior zone: implant/s replacing anterior teeth, (2) middle zone: implant/s replacing premolars, and (3) posterior zone: implant/s replacing molars. Peri-implant bleeding on probing (BOP), probing depth (PD), and crestal bone loss (CBL) were measured. P-values less than 0.05 were considered statistically significant. The mean age of patients with T2DM was 42.5 years and that of non-diabetic controls was 40.6 years. The mean fasting blood glucose levels of patients with and without T2DM were 74.5mg/dl (66-80mg/dl) and 82.5mg/dl (79-88.1mg/dl), respectively. The mean duration of T2DM was 4.3 years. There was no significant difference in BOP, PD, or CBL around implants placed in any of the zones in the jaws of patients with and without T2DM. There is no influence of implant location on clinical and radiographic parameters around dental implants placed in patients with and without T2DM.
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Affiliation(s)
- T Abduljabbar
- Department of Prosthetic Dental Sciences, College of Dentistry, King Saud University, Riyadh, Saudi Arabia
| | - F Javed
- Department of General Dentistry, Eastman Institute for Oral Health, University of Rochester, New York, USA
| | - V R Malignaggi
- Department of General Dentistry, Faculty of Dentistry, Universidad Santa Maria, Caracas, Venezuela
| | - F Vohra
- Department of Prosthetic Dental Sciences, College of Dentistry, King Saud University, Riyadh, Saudi Arabia
| | - S V Kellesarian
- Department of General Dentistry, Eastman Institute for Oral Health, University of Rochester, New York, USA.
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Cheng YC, Lin DH, Jiang CP, Lin YM. Dental implant customization using numerical optimization design and 3-dimensional printing fabrication of zirconia ceramic. INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN BIOMEDICAL ENGINEERING 2017; 33:e2820. [PMID: 27539228 DOI: 10.1002/cnm.2820] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2015] [Revised: 07/28/2016] [Accepted: 07/28/2016] [Indexed: 06/06/2023]
Abstract
This study proposes a new methodology for dental implant customization consisting of numerical geometric optimization and 3-dimensional printing fabrication of zirconia ceramic. In the numerical modeling, exogenous factors for implant shape include the thread pitch, thread depth, maximal diameter of implant neck, and body size. Endogenous factors are bone density, cortical bone thickness, and non-osseointegration. An integration procedure, including uniform design method, Kriging interpolation and genetic algorithm, is applied to optimize the geometry of dental implants. The threshold of minimal micromotion for optimization evaluation was 100 μm. The optimized model is imported to the 3-dimensional slurry printer to fabricate the zirconia green body (powder is bonded by polymer weakly) of the implant. The sintered implant is obtained using a 2-stage sintering process. Twelve models are constructed according to uniform design method and simulated the micromotion behavior using finite element modeling. The result of uniform design models yields a set of exogenous factors that can provide the minimal micromotion (30.61 μm), as a suitable model. Kriging interpolation and genetic algorithm modified the exogenous factor of the suitable model, resulting in 27.11 μm as an optimization model. Experimental results show that the 3-dimensional slurry printer successfully fabricated the green body of the optimization model, but the accuracy of sintered part still needs to be improved. In addition, the scanning electron microscopy morphology is a stabilized t-phase microstructure, and the average compressive strength of the sintered part is 632.1 MPa.
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Affiliation(s)
- Yung-Chang Cheng
- Department of Mechanical and Automation Engineering, National Kaohsiung First University of Science and Technology, Kaohsiung City, Taiwan
| | - Deng-Huei Lin
- Department of Mechanical and Automation Engineering, National Kaohsiung First University of Science and Technology, Kaohsiung City, Taiwan
| | - Cho-Pei Jiang
- Department of Power Mechanical Engineering, National Formosa University, Yunlin County, Taiwan
| | - Yuan-Min Lin
- Department of Dentistry, National Yang-Ming University, Taipei City, Taiwan
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Clinical Outcome of Hydroxyapatite Coated, Bioactive Glass Coated, and Machined Ti6Al4V Threaded Dental Implant in Human Jaws: A Short-Term Comparative Study. IMPLANT DENT 2017; 25:252-60. [PMID: 26741743 DOI: 10.1097/id.0000000000000376] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
INTRODUCTION Growing aspect of endosseous implant research is focused on surface modification of dental implants for the purpose of improving osseointegration. The aim of this study was to evaluate and compare the clinical outcome (ie, osseointegration) of hydroxyapatite coated, bioactive glass coated and machined titanium alloy threaded dental implants in human jaw bone after implantation. MATERIALS AND METHODS One hundred twenty-six implants (45 hydroxyapatite coated, 41 bioactive glass coated, and 40 machined titanium implants) have been placed in incisor areas of 62 adult patients. Outcome was assessed up to 12 months after prosthetic rehabilitation using different clinical and radiological parameters. Surface roughness of failed implants was analyzed by laser profilometer. DISCUSSION Hydroxyapatite and bioactive glass coating materials were nontoxic and biocompatible. Least marginal bone loss in radiograph, significantly higher (P < 0.05) interface radiodensity, and less interfacial gaps were observed in computed tomography with bioactive glass coated implants at anterior maxilla compared to other 2 types. CONCLUSION Bioactive glass coated implants are equally safe and effective as hydroxyapatite coated and machined titanium implants in achieving osseointegration; therefore, can be effectively used as an alternative coating material for dental implants.
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He P, Truong MK, Adeeb N, Tubbs RS, Iwanaga J. Clinical anatomy and surgical significance of the lingual foramina and their canals. Clin Anat 2017; 30:194-204. [PMID: 28033685 DOI: 10.1002/ca.22824] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2016] [Accepted: 12/26/2016] [Indexed: 11/10/2022]
Abstract
The lingual foramina and canals can be categorized as median or lateral based on their relation to the midline of the mandible. Investigation of the mandibular lingual region is often done with gross anatomical dissections of cadavers, 2D panoramic radiographic imaging, CT, and cone beam CT (CBCT). While gross studies are the most reliable at qualifying canal contents and course, CBCT proved to be superior to other radiographic techniques for visualizing lingual foramina and canals. The submental and sublingual arteries, and their branches are found in the lingual vascular canals. There is tremendous variation between individuals in terms of the course of the lingual canals and their anastomosis with other vascular canals. Performing the dental implantation procedures in the anterior and posterior regions of the mandible can result in perforation of the lingual cortex, which could injure the arteries that lie within the lingual canal. If hemorrhage occurs, it could lead to life-threatening upper airway obstruction. Pre-surgical investigation to identify the diameter of the lingual foramina and canal as well as their distance from the alveolar process might be necessary to prevent hemorrhage for all patients. Clin. Anat. 30:194-204, 2017. © 2017 Wiley Periodicals, Inc.
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Affiliation(s)
- Puhan He
- Harvard School of Dental Medicine, Boston, Massachusetts
| | - Mindy K Truong
- Harvard School of Dental Medicine, Boston, Massachusetts
| | - Nimer Adeeb
- Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts
| | - R Shane Tubbs
- Seattle Science Foundation, Seattle, Washington.,Department of Anatomical Sciences, St. George's University, Grenada
| | - Joe Iwanaga
- Seattle Science Foundation, Seattle, Washington
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Al Amri MD, Alfarraj Aldosari AM, Al-Johany SS, Al Baker AM, Al Rifaiy MQ, Al-Kheraif AA. Comparison of clinical and radiographic status around immediately loaded versus conventional loaded implants placed in patients with type 2 diabetes: 12- and 24-month follow-up results. J Oral Rehabil 2016; 44:220-228. [DOI: 10.1111/joor.12466] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/04/2016] [Indexed: 11/28/2022]
Affiliation(s)
- M. D. Al Amri
- Department of Prosthetic Dental Sciences; College of Dentistry; King Saud University; Riyadh Saudi Arabia
| | - A. M. Alfarraj Aldosari
- Department of Prosthetic Dental Sciences; College of Dentistry; King Saud University; Riyadh Saudi Arabia
| | - S. S. Al-Johany
- Department of Prosthetic Dental Sciences; College of Dentistry; King Saud University; Riyadh Saudi Arabia
| | - A. M. Al Baker
- Department of Prosthetic Dental Sciences; College of Dentistry; King Saud University; Riyadh Saudi Arabia
| | - M. Q. Al Rifaiy
- Department of Prosthetic Dental Sciences; College of Dentistry; King Saud University; Riyadh Saudi Arabia
| | - A. A. Al-Kheraif
- Dental Biomaterials Research Chair; Dental Health Department; College of Applied Medical Sciences; King Saud University; Riyadh Saudi Arabia
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37
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Khojasteh A, Motamedian SR, Sharifzadeh N, Zadeh HH. The influence of initial alveolar ridge defect morphology on the outcome of implants in augmented atrophic posterior mandible: an exploratory retrospective study. Clin Oral Implants Res 2016; 28:e208-e217. [PMID: 27804178 DOI: 10.1111/clr.12991] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/14/2016] [Indexed: 12/11/2022]
Abstract
OBJECTIVES Clinicians commonly consider atrophic site topography as an important determinant in deciding the augmentation technique to utilize, as well as forecasting the likelihood of success. The purpose of this retrospective study was to examine the influence of initial atrophic posterior mandible morphology on the outcome of implants placed following augmentation. MATERIALS AND METHODS A total of 52 patients contributed 71 edentulous sites, and 185 implants were placed with mean follow-up of 37.97 months. The initial defect morphology was classified according to ABC classification (Journal of Oral Implantology, 37, 2013a and 361). Ridge augmentation was performed by "cortical autogenous tenting" (CAT) followed by either simultaneous or delayed implant placement after 4-6 months of healing. The European Academy of Osseointegration success criteria were used to evaluate implant outcomes. RESULTS The overall survival and success rates of dental implants were 98.91% and 80%, respectively. Cumulative success and survival rates in CAT group were 95% and 100% after 2 years of follow-up. The highest marginal bone loss (MBL) was observed (1.26 mm ± 0.99) around implants placed in augmented edentulous sites with initially narrow and flat alveolar crest (defect class CII). Conversely, least MBL (0.48 mm ± 0.78) was detected around implants placed into edentulous sites with two sloped boney walls (defect class AII). Differences between MBL observed around implants placed into initial defect class C, initial defect type and class A (I, II), as well as class BII, were statistically significant (P < 0.05). Among all implants, 148 were considered as successful, 26 exhibited satisfactory survival, nine with compromised survival, and two implants failed. CONCLUSION The present data confirmed the effect of initial ridge morphology on the outcome of implants placed into augmented bone. Specifically, class A and class B atrophic ridge defects, with one and two vertical boney walls, respectively, may be considered as more favorable recipient sites than class C defects with flat morphology. This conclusion is based on least MBL around implants placed into initial defect class A and class B augmented sites, and higher MBL in implants placed into class C recipient sites. A randomized controlled trial is warranted to examine these exploratory observations.
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Affiliation(s)
- Arash Khojasteh
- Department of Tissue Engineering, School of Advanced Technologies in Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Saeed Reza Motamedian
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Navid Sharifzadeh
- Laboratory for Immunoregulation and Tissue Engineering, Ostrow School of Dentistry, University of Southern California, Los Angeles, CA, USA
| | - Homayoun H Zadeh
- Laboratory for Immunoregulation and Tissue Engineering, Ostrow School of Dentistry, University of Southern California, Los Angeles, CA, USA
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Al Amri MD, Abduljabbar TS, Al-Johany SS, Al Rifaiy MQ, Alfarraj Aldosari AM, Al-Kheraif AA. Comparison of clinical and radiographic parameters around short (6 to 8 mm in length) and long (11 mm in length) dental implants placed in patients with and without type 2 diabetes mellitus: 3-year follow-up results. Clin Oral Implants Res 2016; 28:1182-1187. [DOI: 10.1111/clr.12938] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/06/2016] [Indexed: 11/28/2022]
Affiliation(s)
- Mohammad D. Al Amri
- Department of Prosthetic Dental Sciences; College of Dentistry; King Saud University; Riyadh Saudi Arabia
| | - Tariq S. Abduljabbar
- Department of Prosthetic Dental Sciences; College of Dentistry; King Saud University; Riyadh Saudi Arabia
| | - Sulieman S. Al-Johany
- Department of Prosthetic Dental Sciences; College of Dentistry; King Saud University; Riyadh Saudi Arabia
| | - Mohammad Q. Al Rifaiy
- Department of Prosthetic Dental Sciences; College of Dentistry; King Saud University; Riyadh Saudi Arabia
| | | | - Abdulaziz A. Al-Kheraif
- Dental Biomaterials Research Chair; Dental Health Department, College of Applied Medical Sciences; King Saud University; Riyadh Saudi Arabia
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Oxidative Nanopatterning of Titanium Surface Influences mRNA and MicroRNA Expression in Human Alveolar Bone Osteoblastic Cells. Int J Biomater 2016; 2016:9169371. [PMID: 27200092 PMCID: PMC4856946 DOI: 10.1155/2016/9169371] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2015] [Revised: 03/30/2016] [Accepted: 04/05/2016] [Indexed: 11/17/2022] Open
Abstract
Titanium implants have been extensively used in orthopedic and dental applications. It is well known that micro- and nanoscale surface features of biomaterials affect cellular events that control implant-host tissue interactions. To improve our understanding of how multiscale surface features affect cell behavior, we used microarrays to evaluate the transcriptional profile of osteoblastic cells from human alveolar bone cultured on engineered titanium surfaces, exhibiting the following topographies: nanotexture (N), nano+submicrotexture (NS), and rough microtexture (MR), obtained by modulating experimental parameters (temperature and solution composition) of a simple yet efficient chemical treatment with a H2SO4/H2O2 solution. Biochemical assays showed that cell culture proliferation augmented after 10 days, and cell viability increased gradually over 14 days. Among the treated surfaces, we observed an increase of alkaline phosphatase activity as a function of the surface texture, with higher activity shown by cells adhering onto nanotextured surfaces. Nevertheless, the rough microtexture group showed higher amounts of calcium than nanotextured group. Microarray data showed differential expression of 716 mRNAs and 32 microRNAs with functions associated with osteogenesis. Results suggest that oxidative nanopatterning of titanium surfaces induces changes in the metabolism of osteoblastic cells and contribute to the explanation of the mechanisms that control cell responses to micro- and nanoengineered surfaces.
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Correlation of bone vascularity in the posterior mandible and subsequent implant stability: a preliminary study. IMPLANT DENT 2016; 23:200-5. [PMID: 24614879 DOI: 10.1097/id.0000000000000057] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
OBJECTIVES Bone vascularity is an important factor in process of osseointegration. The aim of this study was to find whether or not blood perfusion of the bone around the prepared implant sites influences subsequent implant stability. METHODS Patients with bilaterally edentulous mandible were treated with dental implants. Bone vascularity in implant sites was previously noted using Laser Doppler Flowmetry (LDF). Implant stability quotient (ISQ) was measured during follow-up period of 26th week. Statistical distribution and correlation between LDF and ISQ values were presented. Other variables (type of implant loading; sex and distance from the apical part of implant sites to the roof of the mandibular canal) were collected and correlated with LDF values. RESULTS The mean recorded LDF value was 53.05 perfusion unit. Eighteen implants were immediately loaded, and the other 18 were early loaded. In the group of early loaded implants, a statistically significant correlation between mean value of LDF and changing value of resonance frequency analysis (P < 0.05) was noted at 5th, 6th, 12th, and 26th weeks. Using Pearson coefficient of correlation, there was no statistically significant relationship between other variables and LDF values. CONCLUSION LDF values of implant sites might determine future implant stability.
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Comparative Finite Element Analysis of Short Implants and Lateralization of the Inferior Alveolar Nerve With Different Prosthesis Heights. J Craniofac Surg 2015; 26:2342-6. [PMID: 26491923 DOI: 10.1097/scs.0000000000002083] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
The lateralization of the inferior alveolar nerve (LIAN) and short implants are efficient options for rehabilitation of the posterior atrophic mandible. However, the loss of bone leads to prosthesis with greater height and lever effect that in turn can have different impact on treatments. Through the finite element method, the present study tests the hypothesis that conventional implants placed under LIAN and short implants have similar risk of bone loss regarding variable height of the crown and that crown-to-implant ratio is not a reliable resource to evaluate risk in these treatments. Computed tomography scans of mandibles were processed and implants and prosthetic components were reverse engineered for reconstruction of three-dimensional models to simulate 3 elements fixed partial dentures supported by 2 osseointegrated implants. The models of implants were based on MK III implants (Nobel Biocare, Zurich, Switzerland) with 4 mm in diameter by 7 mm in length representing short implants, and 15 mm in length representing implants used in LIAN. The implant/crown ratio for short implants was 1:1.5, 1:2, and 1:2.5 and LIAN models were modeled with exactly the same prosthesis, resulting in implant/crown ratios of 1:0.67, 1:0.89, and 1:1.12. The results partially rejected the hypothesis that LIAN and short implants have similar risk of bone loss, showing that although LIAN results were better in the models evaluated, the variations in height had proportionally similar impact on both treatments and accepted the hypothesis that crown-to-implant ratio was not a reliable resource to evaluate risk.
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Arora V, Rao J, Singh SV, Mishra N, Singh K, Kumar L, Agrawal KK, Mohammad S. An In Vivo 24-Month Study to Compare Crestal Bone Loss and Pocket Depth of Platform-Switched Implants Placed in Maxillary Anterior and Mandibular Posterior Regions. J Prosthodont 2015. [PMID: 26221967 DOI: 10.1111/jopr.12320] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
PURPOSE To analyze and compare crestal bone loss and pocket depth around platform-switched implants placed at two intraoral locations. MATERIALS AND METHODS Eighty platform-switched implants, 40 in the maxillary anterior region (group - ANT) and 40 in the mandibular posterior region (group - POST), were placed in healthy men aged between 25 and 45 years, and restored following two-stage surgical and progressive loading protocols. Digital radiographs for crestal bone level assessment and pocket depths on facial, mesial, distal, and palatal/lingual sites around the implant were recorded at definitive restoration cementation (baseline) and 6-month follow-up. Difference in pre- and post-periodontal pocket depths and crestal bone loss levels were measured and analyzed statistically using SPSS v.16.0, applying the Mann-Whitney test (p < 0.05 considered significant). RESULTS Mean bone loss was significantly higher in group ANT (1.2 ± 0.3 mm) than in group POST (0.7 ± 0.02 mm). Palatal pocket depth increase was significantly greater in the ANT group (p = 0.01), and distal pocket depth increase was significantly greater for the POST group (p = 0.002). CONCLUSION The amount of bone loss noted in the maxillary anterior region compared to the mandibular posterior region was significantly more. This could possibly be because of greater vertical cantilever and offset loads in the anterior compared to the posterior region. Significantly greater pocket depth in mandibular posterior distal and maxillary anterior palatal regions could be related to oral hygiene maintenance issues.
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Affiliation(s)
- Varuni Arora
- Department of Prosthodontics, Faculty of Dental Sciences, KGMU UP, Lucknow, India
| | - Jitendra Rao
- Department of Prosthodontics, Faculty of Dental Sciences, KGMU UP, Lucknow, India
| | - Saumyendra V Singh
- Department of Prosthodontics, Faculty of Dental Sciences, KGMU UP, Lucknow, India
| | - Niraj Mishra
- Department of Prosthodontics, Faculty of Dental Sciences, KGMU UP, Lucknow, India
| | - Kamleshwar Singh
- Department of Prosthodontics, Faculty of Dental Sciences, KGMU UP, Lucknow, India
| | - Lakshya Kumar
- Department of Prosthodontics, Faculty of Dental Sciences, KGMU UP, Lucknow, India
| | | | - Shadab Mohammad
- Department of Oral and Maxillofacial Surgery, Faculty of Dental Sciences, C.S.M. Medical University UP, Lucknow, India
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Influence of implantation side on the integration of dental implants. INTERNATIONAL JOURNAL OF STOMATOLOGY & OCCLUSION MEDICINE 2015. [DOI: 10.1007/s12548-015-0126-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Sugiura T, Yamamoto K, Kawakami M, Horita S, Murakami K, Kirita T. Influence of bone parameters on peri-implant bone strain distribution in the posterior mandible. Med Oral Patol Oral Cir Bucal 2015; 20:e66-73. [PMID: 25129251 PMCID: PMC4320423 DOI: 10.4317/medoral.19878] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2014] [Accepted: 05/13/2014] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVES The success rate of dental implants depends on the type of bone at the implant site. The purpose of the present study was to investigate the effects of the bone parameters at the implant-placement site on peri-implant bone strain distributions. STUDY DESIGN The morphologies and bone densities of seventy-five potential implant sites in the posterior mandible were measured using computed tomography (CT). Based on the CT data, we defined bone parameters (low and high in terms of cancellous-bone density and crestal-cortical bone density, and thin and thick in terms of crestal-cortical bone thickness), and we constructed finite-element models simulating the various bone types. A buccolingual oblique load of 200 N was applied to the top of the abutment. The von Mises equivalent (EQV) strains in the crestal-cortical bone and in the cancellous bone around the implant were calculated. RESULTS Cancellous-bone density greatly affected the maximum EQV strain regardless of the density and thickness of the crestal cortical-bone. The maximum EQV strains in the crestal cortical-bone and the cancellous bone in the low-density cancellous-bone models (of 150 Hounsfield units (HU)) were 1.56 to 2.62-fold and 3.49 to 5.31-fold higher than those in the high-density cancellous-bone models (of 850 HU), respectively. The crestal cortical-bone density affected the maximum EQV strains in the crestal cortical-bone and in the cancellous bone in the low-density cancellous-bone models. The crestal cortical-bone thickness affected the maximum EQV strains in the cancellous bone and in the crestal cortical-bone in the low-density cancellous-bone models. CONCLUSIONS Our results confirm the importance of bone types for the peri-implant bone strain distribution. Cancellous-bone density may be a critical factor for peri-implant bone strain.
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Affiliation(s)
- Tsutomu Sugiura
- Department of Oral and Maxillofacial Surgery, Nara Medical University, 840 Shijo-cho, Kashihara City, Nara 634-8522, Japan,
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Glibert M, Vervaeke S, De Bruyn H, Östman PO. Clinical and Radiographic Comparison between Platform-Shifted and Nonplatform-Shifted Implant: A One-Year Prospective Study. Clin Implant Dent Relat Res 2014; 18:129-37. [DOI: 10.1111/cid.12269] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Maarten Glibert
- Department of Periodontology and Oral Implantology; Dental School; Faculty of Medicine and Health Sciences; University of Ghent; Ghent Belgium
| | - Stijn Vervaeke
- Department of Periodontology and Oral Implantology; Dental School; Faculty of Medicine and Health Sciences; University of Ghent; Ghent Belgium
| | - Hugo De Bruyn
- Department of Periodontology and Oral Implantology; Dental School; Faculty of Medicine and Health Sciences; University of Ghent; Ghent Belgium
- Department of Prosthodontics; School of Dentistry; Malmö University; Malmö Sweden
| | - Pär-Olov Östman
- Department of Periodontology and Oral Implantology; Dental School; Faculty of Medicine and Health Sciences; University of Ghent; Ghent Belgium
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Trivedi B, Jayam C, Bandlapalli A, Patel N. Surgical and orthodontic management of a horizontally impacted permanent mandibular canine: timing is vital. BMJ Case Rep 2014; 2014:bcr-2014-205052. [PMID: 25082868 DOI: 10.1136/bcr-2014-205052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
Failure of eruption of the mandibular permanent canine is an unusual event. This case report presents combined surgical and orthodontic management of an impacted permanent mandibular canine of a 10-year-old boy. Treatment considerations for impacted mandibular canines differ in comparison with other teeth. The paper also highlights on various treatment options, timing and biomechanical considerations while dealing with these teeth.
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Affiliation(s)
- Bhavesh Trivedi
- Department of Paediatric Dentistry, College of Dental Science & Research Center, Ahmedabad, Gujarat, India
| | - Cheranjeevi Jayam
- Department of Paediatric Dentistry, College of Dental Science & Research Center, Ahmedabad, Gujarat, India
| | - Anila Bandlapalli
- Department of Conservative Dentistry & Endodontics, AECS Maruti Dental College, Kolkata, West Bengal, India
| | - Nikunj Patel
- Department of Orthodontics, MP Patel Dental College, Baroda, Vadodara, Gujarat, India
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Sununliganon L, Peng L, Singhatanadgit W, Cheung LK. Osteogenic efficacy of bone marrow concentrate in rabbit maxillary sinus grafting. J Craniomaxillofac Surg 2014; 42:1753-65. [PMID: 25052732 DOI: 10.1016/j.jcms.2014.06.011] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2014] [Revised: 04/29/2014] [Accepted: 06/05/2014] [Indexed: 12/23/2022] Open
Abstract
Maxillary sinus grafting is required to increase bone volume in the atrophic posterior maxilla to facilitate dental implant placement. Grafting with autogenous bone (AB) is ideal, but additional bone harvesting surgery is unpleasant. Alternatively, bone substitutes have been used but they limit new bone formation. The strategy of single-visit clinical stem cell therapy using bone marrow aspirate concentrate (BMAC) to facilitate new bone formation has been proposed. This study aimed to assess bone regeneration capacity of autologous BMAC mixed with bovine bone mineral (BBM) in maxillary sinus grafting. Twenty-four white New Zealand rabbits were used and their maxillary sinuses were randomly assigned for grafting with 4 different materials. Rates of new bone apposition in augmented sinuses were measured and bone histomorphometry were examined. Significant increase in the quantity of nucleated cells and colony forming unit-fibroblasts were confirmed in BMAC. Mesenchymal stem cells in BMAC retained their in vitro multi-differentiation capability. Higher rates of mineral appositions in the early period were detected in BBM + BMAC and AB than BBM alone, though they are not significantly different. Graft volume/tissue volumes in BBM and BBM + BMAC were found to be higher than those in AB and sham.
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Affiliation(s)
- L Sununliganon
- Oral and Maxillofacial Surgery, Faculty of Dentistry, The University of Hong Kong, China; Faculty of Dentistry, Thammasat University, Thailand
| | - L Peng
- Oral and Maxillofacial Surgery, Faculty of Dentistry, The University of Hong Kong, China
| | | | - L K Cheung
- Oral and Maxillofacial Surgery, Faculty of Dentistry, The University of Hong Kong, China.
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Simons WF, De Smit M, Duyck J, Coucke W, Quirynen M. The proportion of cancellous bone as predictive factor for early marginal bone loss around implants in the posterior part of the mandible. Clin Oral Implants Res 2014; 26:1051-9. [DOI: 10.1111/clr.12398] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/18/2014] [Indexed: 12/13/2022]
Affiliation(s)
- Willem-Frederik Simons
- Department of Oral Health Sciences; KU Leuven; University Hospitals Leuven; Leuven Belgium
| | - Menke De Smit
- Department of Oral Health Sciences; KU Leuven; University Hospitals Leuven; Leuven Belgium
| | - Joke Duyck
- Department of Oral Health Sciences; KU Leuven; University Hospitals Leuven; Leuven Belgium
| | - Wim Coucke
- Department of Clinical Biology; Scientific Institute of Public Health; Brussels Belgium
| | - Marc Quirynen
- Department of Oral Health Sciences; KU Leuven; University Hospitals Leuven; Leuven Belgium
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Ávila-Ruiz F, Ávila-Ruiz F, Cuello S, Hermosilla A, Aravena P. Sexual dimorphism in the incisive canal in humans: A literature review. JOURNAL OF ORAL RESEARCH 2014. [DOI: 10.17126/joralres.2014.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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50
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Evaluation of Possible Prognostic Factors for the Success, Survival, and Failure of Dental Implants. IMPLANT DENT 2014; 23:44-50. [DOI: 10.1097/id.0b013e3182a5d430] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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