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Hu Z, Yuan Z, Cao D, Tang R, Liu S, Wen S, Gao A, Lin Z. Accuracy of implant height and width measurement with triaxial rotation method based on cone-beam CT. Heliyon 2024; 10:e32076. [PMID: 38868001 PMCID: PMC11168391 DOI: 10.1016/j.heliyon.2024.e32076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2024] [Revised: 05/11/2024] [Accepted: 05/28/2024] [Indexed: 06/14/2024] Open
Abstract
Objective To investigate the accuracy of implant height and width measurement in the mandibular and maxillary first molar region based on cone-beam CT (CBCT) data, and to establish an accurate method for bone measurement in the implant region. Materials and methods CBCT images of 122 patients with implant in mandibular or maxillary first molar region were retrospectively collected. Two methods were used to measure sagittal height (SH), coronal height (CH), sagittal width (SW), and coronal width (CW) of implants. Method 1 (general method): the images were analyzed using the built-in software NNT 9.0 software. SHl, CHl, SWl, and CWl were measured on the reconstructed sagittal and coronal based on the radiologist's own experience. Method 2 (triaxial rotation method): the raw data were demonstrated in Expert mode of NNT 9.0 software, in which the coronal axis and sagittal axis were rotated paralleling to the long axis of the implant for reconstruction, and then SH2, CH2, SW2, and CW2 were measured on the reconstructed sagittal and coronal images. The results of two methods were compared with the actual implant size (H0, W0). Paired T-test was performed for statistical analysis. Dahlberg formula was used to check the measurement error. Results For method 1, there was no significant differences between SHl and H0 (P > 0.05), but significant differences between CHl and H0, SWl and W0, and CWl and W0 (P < 0.05). For method 2, there were no significant differences between all measurements and actual size (P > 0.05). The random error range measured using Dahlberg formula was 0.157-1.171 mm for general method and 0.017-0.05 mm for triaxial rotation method. Conclusion The triaxial rotation method is accurate for implant height and width measurements on CBCT images and could be used in pre-operatively bone height and width measurement of potential implant sites.
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Affiliation(s)
- Ziyang Hu
- Department of Dentomaxillofacial Radiology, Nanjing Stomatological Hospital, Affiliated Hospital of Medical School, Institute of Stomatology, Nanjing University, Nanjing, China
- Department of Stomatology, Shenzhen Longhua District Central Hospital, Shenzhen, Guangdong Province, China
| | - Zhengding Yuan
- Department of Dentomaxillofacial Radiology, Nanjing Stomatological Hospital, Affiliated Hospital of Medical School, Institute of Stomatology, Nanjing University, Nanjing, China
| | - Dantong Cao
- Department of Dentomaxillofacial Radiology, Nanjing Stomatological Hospital, Affiliated Hospital of Medical School, Institute of Stomatology, Nanjing University, Nanjing, China
| | - Rong Tang
- Department of Dentomaxillofacial Radiology, Nanjing Stomatological Hospital, Affiliated Hospital of Medical School, Institute of Stomatology, Nanjing University, Nanjing, China
| | - Shu Liu
- Department of Dentomaxillofacial Radiology, Nanjing Stomatological Hospital, Affiliated Hospital of Medical School, Institute of Stomatology, Nanjing University, Nanjing, China
| | - Shanhui Wen
- Department of Dentomaxillofacial Radiology, Nanjing Stomatological Hospital, Affiliated Hospital of Medical School, Institute of Stomatology, Nanjing University, Nanjing, China
| | - Antian Gao
- Department of Dentomaxillofacial Radiology, Nanjing Stomatological Hospital, Affiliated Hospital of Medical School, Institute of Stomatology, Nanjing University, Nanjing, China
| | - Zitong Lin
- Department of Dentomaxillofacial Radiology, Nanjing Stomatological Hospital, Affiliated Hospital of Medical School, Institute of Stomatology, Nanjing University, Nanjing, China
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Aljudaibi SM, Aseri AA, Alqhtani MAZ, Aldowah O, Alhendi KDS, Almeshari AA. Clinical and Radiographic Status and PISF Levels of PGE2 Around Cement and Screw Retained Implants. Int Dent J 2024:S0020-6539(24)00131-X. [PMID: 38866672 DOI: 10.1016/j.identj.2024.04.026] [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: 04/13/2024] [Revised: 04/22/2024] [Accepted: 04/27/2024] [Indexed: 06/14/2024] Open
Abstract
BACKGROUND The aim was to assess the peri-implant clinicoradiographic status and prostaglandin E2 (PGE2) levels in peri-implant sulcular fluid (PISF) samples collected from individuals with cement-retained and crew-retained implants. METHODS In this observational study, participants with cement-retained and screw-retained implants were enrolled. A questionnaire was utilized to gather demographic information and assess the educational background of the participants. Peri-implant modified plaque and bleeding indices, probing depth, and crestal bone loss were measured. Subsequently, PISF samples were collected, and corresponding volumes were recorded. Commercial kits employing enzyme-linked immunosorbent assay were employed to quantify PGE2 levels. The sample size was determined, and group comparisons were conducted using the Student t test and the Mann-Whitney U-test. Logistic regression models were constructed to evaluate the correlation between PGE2 levels and clinicoradiographic and demographics. The predefined level of significance was established at P < .05. RESULTS Sixty-seven participants, consisting of 33 with cement-retained implants and 34 with screw-retained implants, were included in the study. The mean ages for individuals with cement and screw-retained implants were 54.2 ± 8.7 and 58.7 ± 7.4 years, respectively. The majority of participants had completed university-level education. Reportedly, 87.9% and 82.4% of individuals with cement and screw-retained implants, respectively brushed teeth twice daily. No significant differences were observed in clinicoradiographic parameters, PGE2 volume, and levels between cement-retained and screw-retained implants. There was no correlation between PGE2 levels and peri-implant clinicoradiographic parameters among individuals with either cement-retained or screw-retained implants. CONCLUSIONS Cement-retained and screw-retained implants exhibit a consistent peri-implant clinicoradiographic status, accompanied by stable levels of PGE2 in PISF provided oral hygiene maintenance regimens are stringently followed.
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Affiliation(s)
- Suha Mohammed Aljudaibi
- Department of Preventive Dental Sciences, College of Dentistry, Princess Nourah bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia
| | - Abdulrahman Ahmed Aseri
- Department of Preventive Dental Sciences, Faculty of Dentistry, Najran University, Najran, Saudi Arabia.
| | | | - Omir Aldowah
- Prosthetic Dental Science Department, Faculty of Dentistry, Najran University, Najran, Saudi Arabia
| | - Khalid Dhafer S Alhendi
- Prosthetic Dental Science Department, Faculty of Dentistry, Najran University, Najran, Saudi Arabia
| | - Ahmed A Almeshari
- Oral and Maxillofacial Surgery and Diagnostic Sciences Department, Faculty of Dentistry, Najran University, Najran, Saudi Arabia
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Yum H, Han HS, Kim K, Kim S, Cho YD. The cumulative survival rate of sandblasted, large-grit, acid-etched dental implants: a retrospective analysis. J Periodontal Implant Sci 2024; 54:122-135. [PMID: 37524380 PMCID: PMC11065536 DOI: 10.5051/jpis.2301440072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Revised: 04/26/2023] [Accepted: 05/11/2023] [Indexed: 08/02/2023] Open
Abstract
PURPOSE This retrospective study aimed to assess the long-term cumulative survival rate of titanium, sandblasted, large-grit, acid-etched implants over a 10-year follow-up period and investigate the factors affecting the survival rate and change in marginal bone loss (MBL). METHODS The study included 400 patients who underwent dental implant placement at the Department of Periodontology of Seoul National University Dental Hospital (SNUDH) between 2005 and 2015. Panoramic radiographic images and dental records of patients were collected and examined using Kaplan-Meier analysis, Cox proportional hazards regression analysis, and multiple regression analysis to determine the survival rates and identify any factors related to implant failure and MBL. RESULTS A total of 782 implants were placed with a follow-up period ranging from 0 to 16 years (mean: 8.21±3.75 years). Overall, 25 implants were lost, resulting in a cumulative survival rate of 96.8%. Comparisons of the research variables regarding cumulative survival rate mostly yielded insignificant results. The mean mesial and distal MBLs were 1.85±2.31 mm and 1.59±2.03 mm, respectively. Factors influencing these values included age, diabetes mellitus (DM), jaw location, implant diameter, bone augmentation surgery, and prosthetic unit. CONCLUSIONS This study found that the implant survival rates at SNUDH fell within the acceptable published criteria. The patients' sex, age, DM status, implant location, implant design, implant size, surgical type, bone augmentation, and prosthetic unit had no discernible influence on long-term implant survival. Sandblasted, large-grit, acid-etched implants might offer advantages in terms of implant longevity and consistent clinical outcomes.
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Affiliation(s)
- Haeji Yum
- Department of Periodontology, School of Dentistry and Dental Research Institute, Seoul National University and Seoul National University Dental Hospital, Seoul, Korea
| | - Hee-Seung Han
- Department of Periodontology, School of Dentistry and Dental Research Institute, Seoul National University and Seoul National University Dental Hospital, Seoul, Korea
| | - Kitae Kim
- Department of Molecular Genetics, School of Dentistry and Dental Research Institute, Seoul National University, Seoul, Korea
| | - Sungtae Kim
- Department of Periodontology, School of Dentistry and Dental Research Institute, Seoul National University and Seoul National University Dental Hospital, Seoul, Korea
| | - Young-Dan Cho
- Department of Periodontology, School of Dentistry and Dental Research Institute, Seoul National University and Seoul National University Dental Hospital, Seoul, Korea.
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Prasitwuttisak S, Chantarapanich N, Apinyauppatham K, Poomparnich K, Inglam S. Clinical challenges of biomechanical performance of narrow-diameter implants in maxillary posterior teeth in aging patients: A finite element analysis. PLoS One 2024; 19:e0299816. [PMID: 38527030 PMCID: PMC10962792 DOI: 10.1371/journal.pone.0299816] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Accepted: 02/15/2024] [Indexed: 03/27/2024] Open
Abstract
This study evaluated the biomechanical performance of narrow-diameter implant (NDI) treatment in atrophic maxillary posterior teeth in aging patients by finite element analysis. The upper left posterior bone segment with first and second premolar teeth missing obtained from a patient's cone beam computed tomography data was simulated with cortical bone thicknesses of 0.5 and 1.0 mm. Three model groups were analyzed. The Regimen group had NDIs of 3.3 × 10 mm in length with non-splinted crowns. Experimental-1 group had NDIs of 3.0 × 10 mm in length with non-splinted crowns and Experimental-2 group had NDIs of 3.0 × 10 mm in length with splinted crowns. The applied load was 56.9 N in three directions: axial (along the implant axis), oblique at 30° (30° to the bucco-palatal plane compared to the vertical axis of the tooth), and lateral load at 90° (90° in the bucco-palatal plane compared to the vertical axis of the tooth). The results of the von Mises stress on the implant fixture, the elastic strain, and principal value of stress on the crestal marginal bone were analyzed. The axial load direction was comparable in the von Mises stress values in all groups, which indicated it was not necessary to use splinted crowns. The elastic strain values in the axial and oblique directions were within the limits of Frost's mechanostat theory. The principal value of stress in all groups were under the threshold of the compressive stress and tensile strength of cortical bone. In the oblique and lateral directions, the splinted crown showed better results for both the von Mises stress, elastic strain, and principal value of stress than the non-splinted crown. In conclusion, category 2 NDIs can be used in the upper premolar region of aging patients in the case of insufficient bone for category 3 NDI restorations.
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Affiliation(s)
| | - Nattapon Chantarapanich
- Department of Mechanical Engineering, Faculty of Engineering at Sriracha, Kasetsart University, Chonburi, Thailand
| | | | | | - Samroeng Inglam
- Faculty of Dentistry, Thammasat University, Pathumthani, Thailand
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Herrera-Pérez P, García-De-La-Fuente AM, Andia-Larrea E, Marichalar-Mendia X, Aguirre-Urizar JM, Aguirre-Zorzano LA. Clinical analysis of the tooth-implant papilla for two narrow-diameter titanium-zirconium implants in the anterior area: prospective controlled clinical study. BMC Oral Health 2024; 24:310. [PMID: 38443879 PMCID: PMC10916199 DOI: 10.1186/s12903-024-04075-2] [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: 12/02/2023] [Accepted: 02/26/2024] [Indexed: 03/07/2024] Open
Abstract
BACKGROUND Rehabilitation of the anterior area when the mesio-distal space is reduced is a challenge for the clinician, due to the patient's anatomical limitations and aesthetic requirements. Narrow Diameter Implants (NDI) are an option of treatment when the standard diameter implant is not possible, but the evidence is scarce. This prospective clinical study aims to analyze the formation of the tooth-implant papilla between the implant and the adjacent natural tooth in the maxillary lateral incisors and mandibular incisors. METHODS A total of 40 patients treated with NDI, of titanium-zirconium (Ti-Zr) alloy i.e., 2.9 mm Test Group (TG) and 3.3 mm Control Group (CG), were included. The mesiodistal distance between the adjacent natural teeth was used for implant selection, maintaining 1.5 mm between the fixation and the adjacent tooth. Clinical assessment was performed by a clinical examiner at 6 and 12 months after the final prosthesis. The primary variable was the Jemt Papillary Index. Also, implant survival rate (SR), complications, Implant Stability Quotient (ISQ), and patient-reported outcomes measures (PROMs) such as aesthetics, chewing, phonation, comfort, and self-esteem were analyzed. RESULTS A significant amount of papilla filling was observed concerning the baseline, with a trend towards more formation of the papilla in the TG, with a JPI score of 3. No significant differences were observed between the two groups regarding implant SR, clinical parameters, and complications. In terms of PROMs, a higher satisfaction in the TG was observed, with significant intergroup differences for aesthetics, comfort, self-esteem, and primary stability ISQ (TG: 59.05 (SD: 5.4) vs. CG: 51.55 (SD: 5.7)). CONCLUSIONS The 2.9 mm diameter Ti-Zr implants achieved a formation of papilla similar to 3.3 mm implants in the anterior region at 12 months of follow-up after the final prosthetic restoration. The use of Ti-Zr implants with a diameter of 2.9 mm to rehabilitate single teeth in areas of the anterior region, where the mesiodistal distance is limited, showed favorable clinical results and a high degree of satisfaction during 1 year of observation similar to 3.3 mm dental implants. TRIAL REGISTRATION This study was retrospectively registered in ClinicalTrials.gov with the number NCT05642520, dated 18/11/2022.
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Affiliation(s)
| | - Ana María García-De-La-Fuente
- Research Group: GIU21/042Department of StomatologyFaculty of Medicine and Nursing, University of the Basque Country (UPV/EHU), Barrio Sarriena S/N, 48940, Leioa, Biscay, Spain.
| | - Eztizen Andia-Larrea
- International University of Catalunya, Barcelona, Spain
- Department of Stomatology, University of the Basque Country (UPV/EHU), Biscay, Spain
| | - Xabier Marichalar-Mendia
- Research Group: GIU21/042, Department of Nursery I, University of the Basque Country (UPV/EHU), Biscay, Spain
| | - José Manuel Aguirre-Urizar
- Research Group: GIU21/042Department of StomatologyFaculty of Medicine and Nursing, University of the Basque Country (UPV/EHU), Barrio Sarriena S/N, 48940, Leioa, Biscay, Spain
| | - Luis Antonio Aguirre-Zorzano
- Research Group: GIU21/042Department of StomatologyFaculty of Medicine and Nursing, University of the Basque Country (UPV/EHU), Barrio Sarriena S/N, 48940, Leioa, Biscay, Spain
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Gutierres E, Bergamo ETP, Carvalho LF, Coelho PG, Campos TMB, Piza MMDT, Lopes ACDO, Benalcazar Jalkh EB, Bonfante EA. Single geometry abutment for narrow and extra-narrow implant systems: Survival and failure modes. J Mech Behav Biomed Mater 2023; 143:105872. [PMID: 37201226 DOI: 10.1016/j.jmbbm.2023.105872] [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: 03/10/2023] [Revised: 04/22/2023] [Accepted: 04/23/2023] [Indexed: 05/20/2023]
Abstract
The use of identical prosthetic components for all implant diameters could reduce the production costs by companies and the complexity of component selection for the clinician and his team. However, it would imply in reduction of thickness of the cervical walls of tapered internal connection implants, which could compromise the reliability of narrow and extra-narrow implants. Therefore, this study aims to evaluate the probability of survival and failure modes of extra-narrow implant systems with the same internal diameter as standard-diameter implants using the same prosthetic components. It was used eigth different implant system configurations, including narrow (Ø 3.3 mm) (N) extra-narrow (Ø 2.9 mm) (EN) and extra-narrow-scalloped (Ø 2.9 mm) (ENS) implants, both with cementable abutments (Ce) or titanium bases (Tib) and one-piece implants (Ø 2.5 mm and Ø 3.0 mm) (OP) (Medens, Itu, SP, Brazil), comprising the following groups: OP 3.0; OP 2.5; N Ce; N Tib; EN Ce, EN Tib, ENS-Ce and ENS-Tib. The implants were embedded using polymethylmethacrylate acrylic resin in a 15 mm matrix. Standardized maxillary central incisor crowns were virtually designed and milled to fit on the different studied abutments and cemented using a dual self-adhesive resin cement. The specimens were submitted to SSALT (Step Stress Accelerated Life Testing) at 15 Hz in water until failure or suspension of the test, until a maximum load of 500 N. Fractographic analysis of the failed specimens were realized in scanning electron microscopy. All implant systems demonstrated high probability of survival (90-100%) for missions at 50 and 100 N and values of characteristic strength superior to 139 N. Failure modes were restricted to the abutment in all the implant configurations tested. Therefore, the use extra-narrow implants with standardized prosthetic components for different implant diameters is a viable option for the replacement of anterior teeth.
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Affiliation(s)
- Eliezer Gutierres
- Department of Prosthodontics and Periodontology, Bauru School of Dentistry, São Paulo University - USP, Bauru, SP, Brazil.
| | - Edmara Tatiely Pedroso Bergamo
- Department of Prosthodontics and Periodontology, Bauru School of Dentistry, São Paulo University - USP, Bauru, SP, Brazil.
| | - Laura Firmo Carvalho
- Department of Prosthodontics and Periodontology, Bauru School of Dentistry, São Paulo University - USP, Bauru, SP, Brazil.
| | - Paulo G Coelho
- Department of Surgery, University of Miami Miller School of Medicine, Miami, FL, USA.
| | - Tiago Moreira Bastos Campos
- Department of Prosthodontics and Periodontology, Bauru School of Dentistry, São Paulo University - USP, Bauru, SP, Brazil; Department of Physics, Aeronautics Technological Institute, São José dos Campos, SP, Brazil.
| | - Mariana Miranda de Toledo Piza
- Department of Prosthodontics and Periodontology, Bauru School of Dentistry, São Paulo University - USP, Bauru, SP, Brazil.
| | | | - Ernesto Byron Benalcazar Jalkh
- Department of Prosthodontics and Periodontology, Bauru School of Dentistry, São Paulo University - USP, Bauru, SP, Brazil.
| | - Estevam Augusto Bonfante
- Department of Prosthodontics and Periodontology, Bauru School of Dentistry, São Paulo University - USP, Bauru, SP, Brazil.
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Kniha K, Hermanns-Sachweh B, Al-Sibai F, Kneer R, Möhlhenrich SC, Heitzer M, Hölzle F, Modabber A. Effect of thermal osteonecrosis around implants in the rat tibia: numerical and histomorphometric results in context of implant removal. Sci Rep 2022; 12:22227. [PMID: 36564495 PMCID: PMC9789117 DOI: 10.1038/s41598-022-25581-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Accepted: 12/01/2022] [Indexed: 12/24/2022] Open
Abstract
The purpose of this rat study was to explore the feasibility of in vivo temperature thresholds affecting bone contact at the implant surface. Based on these data, thermal necrosis should be used for implant removal in the subsequent in vivo study. Rat tibiae of 48 animals at one site were randomly treated with heat or cold before implant insertion. Temperatures of 4 °C, 3 °C, 2 °C, 48 °C, 49 °C and 50 °C for a tempering time of 1 min were evaluated. Numerical simulations of the heat source-implant-bone system were carried out. Effects were assessed by histomorphometrical measurements. The results showed that the selected method of direct tempering using a tempering pin was suitable for maintaining a uniform layer around the pin. Starting at warm temperatures of 48 °C and rising to 50 °C, the BIC ratio revealed declining values and a significant difference was observed when comparing 50 °C to the control group (p = 0.03). However, there were no significant variations within the cold temperatures. This study pinpointed temperature discovered that could lead to the thermo-explantation and so that the number of samples used in future studies on temperature-induced bone necrosis can be reduced to a minimum. Significant BIC value reduction was seen at a temperature of 50 °C for 1 min.
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Affiliation(s)
- Kristian Kniha
- grid.412301.50000 0000 8653 1507Department of Oral and Cranio-Maxillofacial Surgery, University Hospital, RWTH Aachen, Pauwelstraße 30, 52074 Aachen, Germany ,Private Clinic for Oral Surgery Dres. Kniha, Rosental 6, 80331 Munich, Germany
| | - Benita Hermanns-Sachweh
- Private Institute for Implant Pathology, ZBMT, Campus Melaten, Pauwelsstaße 17, Aachen, Germany
| | - Faruk Al-Sibai
- grid.1957.a0000 0001 0728 696XInstitute of Heat and Mass Transfer, RWTH Aachen University, Augustinerbach 6, Aachen, Germany
| | - Reinhold Kneer
- grid.1957.a0000 0001 0728 696XInstitute of Heat and Mass Transfer, RWTH Aachen University, Augustinerbach 6, Aachen, Germany
| | - Stephan Christian Möhlhenrich
- grid.412581.b0000 0000 9024 6397Department of Orthodontics, University of Witten/Herdecke, Alfred-Herrhausen Str. 45, 58455 Witten, Germany
| | - Marius Heitzer
- grid.412301.50000 0000 8653 1507Department of Oral and Cranio-Maxillofacial Surgery, University Hospital, RWTH Aachen, Pauwelstraße 30, 52074 Aachen, Germany
| | - Frank Hölzle
- grid.412301.50000 0000 8653 1507Department of Oral and Cranio-Maxillofacial Surgery, University Hospital, RWTH Aachen, Pauwelstraße 30, 52074 Aachen, Germany
| | - Ali Modabber
- grid.412301.50000 0000 8653 1507Department of Oral and Cranio-Maxillofacial Surgery, University Hospital, RWTH Aachen, Pauwelstraße 30, 52074 Aachen, Germany
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Dental implant failure and factors associated with treatment outcome: A retrospective study. JOURNAL OF STOMATOLOGY, ORAL AND MAXILLOFACIAL SURGERY 2022; 124:101314. [PMID: 36280552 DOI: 10.1016/j.jormas.2022.10.013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Revised: 09/26/2022] [Accepted: 10/16/2022] [Indexed: 12/12/2022]
Abstract
PURPOSE The purpose of the present study was to retrospectively 1) investigate the association between implant-, patient- and bone-related parameters with the risk of implant failure; 2) analyze the survival rates of dental implants placed in a university clinical setting. METHODS Data were retrieved from patient charts from the University of Minnesota School of Dentistry to identify patients older than 18 years of age who received dental implant treatment by faculty, residents or students in the university dental clinics. Implant-, patient- and bone-related parameters such as implant system, length, diameter, jaw, region, installation protocol, gender, smoking, medical history, history of periodontal disease, self-reported oral parafunctions, type of bone, and operator were manually retrieved and analyzed. RESULTS Five hundred and fifty-three implants were randomly selected from a total of 4,424. Of these 553 implants, 440 (79.6%) were associated with a >10 mm length, 371 (67.1%) with a >4 mm diameter and 431 (77.9%) had replaced a single tooth. Submerged healing mode was followed in 363 (65.6%) of the implants with the mean healing time being 3.2 months. History of periodontal disease was identified in 294 (53.2%) of these cases. A total of 17 implants failed after a mean time of 6.29 ± 6.75 months, resulting in an overall survival rate of 96.9%. Based on a univariate analysis, implant system, operator, time between extraction and implant surgery, time between bone grafting and implant placement, tobacco use as well as clenching and grinding were considered potential implant failure predictors and were further included in the multivariate logistic regression analysis. Tobacco use (p < 0.001) was significantly associated with implant failure. CONCLUSION Within the limitations of this retrospective randomly selected university-treated sample tobacco use increased the risk for implant failure. Failure occurred in 17 implants representing a 3.1% failure rate.
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Thiebot N, Hamdani A, Blanchet F, Dame M, Tawfik S, Mbapou E, Kaddouh AA, Alantar A. Implant failure rate and the prevalence of associated risk factors: a 6-year retrospective observational survey. JOURNAL OF ORAL MEDICINE AND ORAL SURGERY 2022. [DOI: 10.1051/mbcb/2021045] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
Introduction: The purpose of this monocentric retrospective observational investigation is to evaluate the implant failure rate observed in an oral surgery department and analyze the risk factors associated with them. Preventative measures will be suggested to reduce the incidence of implant failure. Material and method: All implants removed between 2014 and 2020 were analyzed. The main criterion assessed was the overall failure rate over 6 years of activity;the secondary criteria were the risk factors associated with implant failure. Results: 12 out of 376 implants placed between 2014 and 2019 in 11 patients (mean age: 55.5 ±11.5 years);sex ratio M/F=5/6) were removed, for an overall failure rate of 3.11%. The majority, 83% (10/12) of the lost implants, were in the maxilla, while only 17% (2/12) were placed in the mandible. The main risk factors identified were: a III−IV bone type density (75%, 9/12), pre-implant sinus lift surgery (42%, 5/12) smoking (8.3%, 1/12), surgical site infection (8.3%, 1/12) and rheumatoid arthritis (8.3%, 1/12). Conclusion: The failure rate observed in this oral surgery unit is consistent with the other international studies, confirming the compliance with good clinical practices of the healthcare team. Pre-implant bone surgery is the major risk factor to consider before implant surgery.
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Alsharif SB, Bahanan L, Almutairi M, Alshammry S, Khalifa H. Retrospective Assessment of Dental Implant-Related Anatomical Structure Perforations Using Cone Beam Computed Tomography. ANNALS OF DENTAL SPECIALTY 2022. [DOI: 10.51847/jeyoudif94] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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A Six-Year Prospective Comparative Study of Wide and Standard Diameter Implants in the Maxillary and Mandibular Posterior Area. MEDICINA-LITHUANIA 2021; 57:medicina57101009. [PMID: 34684046 PMCID: PMC8540610 DOI: 10.3390/medicina57101009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Revised: 09/17/2021] [Accepted: 09/22/2021] [Indexed: 11/17/2022]
Abstract
Background and Objectives: The aim of our study was to test whether wide diameter (6 mm) implants perform differently from standard diameter (4 mm) implants in terms of marginal bone level and survival rate. Materials and Methods: Our sample comprised 72 patients who underwent surgery; a total of 80 implants were placed in the maxillary or mandibular molar region. Patients were divided into two groups according to the diameter of the implant, and were followed up for six years after the final setting of the prosthetics. In the test group, 40 implants with 6-mm diameter were inserted; in the control group, 40 standard diameter implants were inserted. Using panoramic radiographs, we investigated mesial and distal marginal bone levels around the implant fixtures. Results: After the first implant surgery, three implants, including one wide diameter and two standard diameter implants, failed due to lack of osseointegration. We did not note any fixture fracture during the six-year follow-up. After loading, we observed a six-year survival rate of 97.29% with no statistically significant difference from standard diameter implants, with a survival rate of 94.87%. Conclusions: This study shows that 6-mm diameter implants may be considered in the presence of adequate alveolar ridge width in the posterior maxillary and mandibular regions.
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Emmert M, Spille J, Behrens E, Ayna M, Karayurek F, Wiltfang J, Acil Y, Gülses A. Comparative assessment of the primary stability of Straumann® BLX implant design using an in-vitro sinus lift-simultaneous implant insertion model. J ORAL IMPLANTOL 2021; 48:269-275. [PMID: 34494117 DOI: 10.1563/aaid-joi-d-20-00411] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Straumann ® BLX is a novel implant system, which has been proclaimed to provide an ideal primary stability in all types of bone. In the current study, the primary stability of Straumann ® BLX implant systems with Straumann ® tapered effect (TE) implants have been comparatively assessed in bovine ribs by using a simultaneous sinus elevation and implant insertion model. In the study group, BLX (4.0 x 12 mm), TE (4.1 x 12 mm), BLX (4,5 x 12 mm) and TE (4.8 x 12 mm) were placed in each bony window, which resembles sinus maxillaris. As a control, BLX and TE implants with same sizes were inserted into the proximal diaphysis of the bovine ribs. A total of 40 implant insertions were performed. The stability was measured with resonance frequence analysis. In the study group, TE implants of 4.8 mm showed significantly higher values compared to 4.5 mm BLX implants (p=0.116). However, BLX implants of 4.0 mm in the control group showed higher stability compared to TE with 4.0 mm diameter. (p=0.014). The primary stability of BLX implants in the control group was significantly higher compared to the experimental group in both widths (p=0.018 for BLX 4.0 and p=0.002 for BLX 4.5 respectively). The use of TE design with wide diameter in simultaneous implant placement with sinus lift could present higher ISQ values and might be more appropriate option for implant recipient sites with poor bone volume and quality. However, the advantage of BLX design in standard implant insertion protocols could be precious.
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Affiliation(s)
- Marie Emmert
- Christian-Albrechts-Universität zu Kiel: Christian-Albrechts-Universitat zu Kiel Oral and Maxillofacial Surgery Arnold Heller Straße 3 GERMANY Kiel Schleswig Holstein 24105 Christian-Albrechts-Universität zu Kiel: Christian-Albrechts-Universitat zu Kiel
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Alresayes S, Mokeem SA, Alhenaki AM, Vohra F, Abduljabbar T. Evaluation of the implant diameter on the initial-stability of narrow- and standard-diameter implants placed in simulated Type-I and Type-IV bone-blocks. Pak J Med Sci 2021; 37:812-815. [PMID: 34104170 PMCID: PMC8155436 DOI: 10.12669/pjms.37.3.3943] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Abstract
Objective: A comparison of the initial stability of narrow- and standard-diameter implants (SDIs) placed in Type-I and Type-IV bone-blocks is not yet reported. The aim was to evaluate in-vitro the influence of implant diameter on the initial stability of narrow- and standard-diameter implants (SDIs) placed in simulated Type-I and Type-IV bone-blocks. Methods: The present experimental in-vitro study was performed between July and September 2020 at the Specialist Dental Practice, Riyadh, Saudi Arabia. Narrow- and standard-diameter implants were placed 3-mm apart in simulated soft (Type-IV) and dense (Type-I) bone blocks by a trained and calibrated investigator. In groups A (Type-IV bone blocks) and B (Type-I bone blocks), implants were inserted using an insertion-torque and drilling-speed of 15-30 Ncm and 1000-1500 rpm, respectively with the implant collar at the crest of simulated bone blocks. In all samples, initial-stability was recorded using resonance frequency analysis (RFA). Sample-size estimation was done and group-comparisons were carried out. A P-value of 0.01 or less reflected statistical significance. Results: In Groups-A and -B, 44 (22 NDIs and 22 SDIs) and 44 (22 NDIs and 22 SDIs) were placed. In group-A, the mean RFA values for NDIs and SDIs were 68.5 ± 3.5 and 69.1 ± 2.4, respectively. In Group-B, the mean RFA values for NDIs and SDIs were 78.06 ± 9.6 and 75.3 ± 5.2. RFA values among NDIs and SDIs in groups A and B were similar. Conclusion: The NDIs and SDIs show comparable initial-stability when positioned in simulated Type-I and Type-IV bone blocks.
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Affiliation(s)
- Saad Alresayes
- Saad Alresayes, BDS Department of Prosthetic Dental Science, College of Dentistry, King Saud University, Riyadh 11545, Saudi Arabia
| | - Sameer A Mokeem
- Sameer A. Mokeem, BDS, MSc Department of Periodontics and Community Dentistry, King Saud University, Riyadh 11545, Saudi Arabia
| | - Aasem M Alhenaki
- Aasem M Alhenaki, BDS, MSc Department of Prosthetic Dental Science, College of Dentistry, King Saud University, Riyadh 11545, Saudi Arabia
| | - Fahim Vohra
- Fahim Vohra, MRD, PhD Department of Prosthetic Dental Science, College of Dentistry and Research Chair for Biological Research in Dental Health, College of Dentistry, Riyadh 11545, Saudi Arabia
| | - Tariq Abduljabbar
- Tariq Abduljabbar, BDS, DMSc Department of Prosthetic Dental Science, College of Dentistry and Research Chair for Biological Research in Dental Health, College of Dentistry, Riyadh 11545, Saudi Arabia
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Chaware SH, Thakare V, Chaudhary R, Jankar A, Thakkar S, Borse S. The rehabilitation of posterior atrophic maxilla by using the graftless option of short implant versus conventional long implant with sinus graft: A systematic review and meta-analysis of randomized controlled clinical trial. J Indian Prosthodont Soc 2021; 21:28-44. [PMID: 33835066 PMCID: PMC8061432 DOI: 10.4103/jips.jips_400_20] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Revised: 09/08/2020] [Accepted: 10/03/2020] [Indexed: 01/23/2023] Open
Abstract
Aim The purpose of systematic review and meta-analysis was to compare the efficacy of short implant versus conventional long implant with sinus graft in patients rehabilitated for posterior atrophic maxilla. Setting and Design Systematic review and meta analysis. Materials and Methods Electronic searches were conducted in Pub Med, Embase, and Medline with supplemented by manual search up to December 2019. The randomized controlled trial (RCTs) comparing short implant (<8.5 mm) and long implant (>8.5 mm) with sinus graft were included. (Prospero CRD42020186972). Statistical Analysis Used Random-effect model, fixed-effect model, A funnel plot and the Egger's test. Results Twenty-two Randomized controlled trials (RCTs) were assessed with 667 patients and 1595 implants (short implant:767, Long implant:835). No significant difference of implant survival rate was recorded for short and long implant (at patient level: RR: 1.01, 95% CI = 0.52-2.0, P = 0.87, I2 = 0%, at implant level RR = 1.09, 95% CI = 0.6-2.0, P = 0.7, I2 = 0%). Similarly marginal bone resorption was reported no difference for short and long implant (MD = 0.16. 95% CI: -0.23 = -0.08, P = 0.00, I2 = 74.83%). Biological complications were marginally higher for long implant (RR = 0.48, 95% CI = 0.23-0.8, P = 0.13, I2 = 29.11%). and prosthetic complications were marginally higher for short implants (RR=1.56, 95% CI=0.85-3.15, P = 0.43, I2 = 0%). Conclusion There was no significance difference in implant survival rate and marginal bone resorption recorded for both the short implant and long implant with sinus graft, in the patients rehabilitated with posterior atrophic maxilla. Hence, short implant is a suitable alternative to long implant with sinus graft, for the rehabilitation posterior atrophic maxilla.
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Affiliation(s)
- Sachin Haribhau Chaware
- Department of Prosthodontics, MGVs KBH Dental College and Hospital, Nashik, Maharashtra, India
| | - Vrushali Thakare
- Department of Public Health Dentistry, MGVs KBH Dental College and Hospital, Nashik, Maharashtra, India
| | - Ritu Chaudhary
- Department of Prosthodontics, Royal College of Surgeons England, Britannia Dental Surgery, Newport, UK
| | - Ajit Jankar
- Department of Prosthodontics, MIDSR Dental College, Latur, Maharashtra, India
| | - Smruti Thakkar
- Department of Prosthodontics, MGVs KBH Dental College and Hospital, Nashik, Maharashtra, India
| | - Sidesh Borse
- Department of Prosthodontics, MGVs KBH Dental College and Hospital, Nashik, Maharashtra, India
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Alqhtani N, Alqahtani F, Almalki A, Alanazi A, Alkhuriaf H, Alkhtani F, AlEnazi A. Relationship between buccal alveolar bone thickness and crown-to-root dimensions around mandibular first and second molars: A cone-beam-computed tomography-based study. Technol Health Care 2020; 29:725-733. [PMID: 33185619 DOI: 10.3233/thc-202587] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND Assessment of buccal alveolar bone thickness (ABT) and crown-to-root dimensions are essential in implant density; therefore, three-dimensional evaluation of these parameters provides a superior visualization than conventional radiographs. OBJECTIVE The present cross-sectional cohort study aims to investigate the relationship between buccal ABT and crown-to-root dimensions around the mandibular first and second molars using cone-beam-computed tomography (CBCT). METHODS Initially, CBCT-based scans from 271 individuals were assessed. Based on the inclusion and exclusion criteria, 171 CBCT-based scans were excluded. In total, 100 CBCT-scans were included in the present investigation and processed for data extraction. On the mandibular first and second molars, the mesial and distal root lengths and mesiodistal diameter of the crowns were measured. The pulpal floor served as a reference point for assessment of root length. The buccal ABT was measured at the coronal, middle and apical one-third of the root. Statistical analysis was performed and the level of significance was set at P< 0.01. One-hundred CBCT-scans from 294 mandibular teeth (137 first molars and 157 second molars) were included. One hundred and eighty-nine and 105 teeth were from males and females, respectively. RESULTS The normality plot showed a normal data distribution. The mesiodistal crown width showed a weak yet significant correlation with mesial root length (r= 0.137), bone thickness at mesial apical third (r= 0.180), distal apical (r= 0.157) and distal coronal third (r= 0.161). Bone thickness at mesial, middle and apical third correlated significantly with one other (r= 0.786). CONCLUSION There is a direct correlation between the buccal ABT and tooth dimensions around the mandibular first and second molars.
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Affiliation(s)
- Nasser Alqhtani
- Department of Oral and Maxillofacial Surgery and Diagnostic Sciences, School of Dentistry, Prince Sattam Bin Abdulaziz University, Al-Kharj, Saudi-Arabia
| | - Fawaz Alqahtani
- Department of Prosthodontics, School of Dentistry, Prince Sattam Bin Abdulaziz University, Al-Kharj, Saudi-Arabia
| | - Abdulrahman Almalki
- College of Dentistry, School of Dentistry, Prince Sattam Bin Abdulaziz University, Al-Kharj, Saudi-Arabia
| | - Ahmed Alanazi
- College of Dentistry, School of Dentistry, Prince Sattam Bin Abdulaziz University, Al-Kharj, Saudi-Arabia
| | - Hamad Alkhuriaf
- College of Dentistry, School of Dentistry, Prince Sattam Bin Abdulaziz University, Al-Kharj, Saudi-Arabia
| | - Fahad Alkhtani
- Department of Prosthodontics, School of Dentistry, Prince Sattam Bin Abdulaziz University, Al-Kharj, Saudi-Arabia
| | - Adel AlEnazi
- Department of Oral and Maxillofacial Surgery and Diagnostic Sciences, School of Dentistry, Prince Sattam Bin Abdulaziz University, Al-Kharj, Saudi-Arabia
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Cruz RS, Lemos CAA, de Batista VES, Yogui FC, Oliveira HFF, Verri FR. Narrow-diameter implants versus regular-diameter implants for rehabilitation of the anterior region: a systematic review and meta-analysis. Int J Oral Maxillofac Surg 2020; 50:674-682. [PMID: 33158693 DOI: 10.1016/j.ijom.2020.10.001] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2020] [Revised: 09/16/2020] [Accepted: 10/02/2020] [Indexed: 12/26/2022]
Abstract
The aim of this systematic review and meta-analysis was to evaluate studies comparing implant survival rates, marginal bone loss (MBL), and mechanical and biological complication rates between narrow-diameter implants (NDIs) and regular-diameter implants (RDIs) used for oral rehabilitation in the anterior region. The review was conducted according to the PRISMA checklist. Two independent reviewers performed a comprehensive search of the PubMed/MEDLINE, Embase, Scopus, and Cochrane Library databases for studies published until May 2020. A total of 843 implants (484 NDIs and 359 RDIs) were included. No significant difference in implant survival rate (risk difference (RD) 0.01, 95% confidence interval (CI) -0.01 to 0.03; P=0.34), MBL (standardised mean difference -0.51mm, 95% CI -1.29 to 0.26mm; P=0.19), mechanical complications (RD 0.01, 95% CI -0.02 to 0.04; P=0.40), or biological complications (RD 0.01, 95% CI -0.09 to 0.11; P=0.85) was found between the implant groups. Within the limitations of this study, it is concluded that NDIs are an effective alternative to RDIs due to similar survival rates, MBL, and mechanical and biological complication rates. However, future studies are highly encouraged due to the small number of interventional studies on this topic.
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Affiliation(s)
- R S Cruz
- Department of Dental Materials and Prosthodontics, Aracatuba Dental School, UNESP - Universidade Estadual Paulista, Campus of Aracatuba, Sao Paulo, Brazil.
| | - C A A Lemos
- Department of Dentistry, Federal University of Juiz de Fora (UFJF), Campus Governador Valadares, Governador Valadares, MG, Brazil
| | - V E S de Batista
- Department of Prosthodontics, Presidente Prudente Dental School, University of the West of São Paulo (UNOESTE), Presidente Prudente, Brazil
| | - F C Yogui
- Department of Dental Materials and Prosthodontics, Aracatuba Dental School, UNESP - Universidade Estadual Paulista, Campus of Aracatuba, Sao Paulo, Brazil
| | - H F F Oliveira
- Department of Dental Materials and Prosthodontics, Aracatuba Dental School, UNESP - Universidade Estadual Paulista, Campus of Aracatuba, Sao Paulo, Brazil
| | - F R Verri
- Department of Dental Materials and Prosthodontics, Aracatuba Dental School, UNESP - Universidade Estadual Paulista, Campus of Aracatuba, Sao Paulo, Brazil
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Sodnom-Ish B, Eo MY, Nguyen TTH, Kim MJ, Kim SM. Clinical feasibility and benefits of a tapered, sand-blasted, and acid-etched surfaced tissue-level dental implant. Int J Implant Dent 2020; 6:39. [PMID: 32761304 PMCID: PMC7406589 DOI: 10.1186/s40729-020-00234-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2020] [Accepted: 06/02/2020] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND It has been 50 years since Brånemark first introduced the concept of osseointegration. Since then, numerous ongoing research, developments, and optimization of implant properties have been conducted. Despite the high survival and success rates of dental implants, failures still occur in a small number of patients that are being rehabilitated by implants. The purpose of this study was to evaluate the survival and success rate of the Stella® implants that incorporate sand-blasted and acid-etched (S&E) surface treatment and tapered body design to confirm their clinical feasibility and benefits after placement. METHODS We reviewed 61 partially and fully edentulous patients who underwent a tapered, S&E surfaced tissue-level implant placement between May 2013 and February 2016 in the Department of Oral and Maxillofacial Surgery in the Seoul National University Dental Hospital. Patient characteristics and treatment results were collected, and records of dental implants were analyzed clinically and radiologically. RESULTS A total of 105 implant fixtures were placed in these patients. The mean age at the time of the surgery was 63.7 years with a range of 31 to 88 years. In total, 4.0-mm and 4.5-mm diameter implants were the most frequently used dental implants (40%, 49%) in this study. Implants 8.5 mm in length were predominantly used (60%). Seventy dental implants were placed in the mandible (70%), and only one dental implant was placed in the maxillary anterior region. At the end of the 5-year observation period, the success rate of the Stella® implants was 98.1%. Among the 105 implants placed, 2 were considered to be failures. Summarizing the clinical and radiographic results, the remaining 103 implants were considered successfully integrated. CONCLUSION The overall success rate was 98.1%. The tapered, S&E surfaced tissue-level implant system exhibited great performance in a variety of clinical situations including failed implant sites that enabled predictable and successful treatment outcomes. The effectives of a tapered design of tissue level, not a parallel design, are shown in this clinical report.
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Affiliation(s)
- Buyanbileg Sodnom-Ish
- Department of Oral and Maxillofacial Surgery, Dental Research Institute, School of Dentistry, Seoul National University, 101 Daehak-ro, Jongno-gu, Seoul, 03080, Korea
| | - Mi Young Eo
- Department of Oral and Maxillofacial Surgery, Dental Research Institute, School of Dentistry, Seoul National University, 101 Daehak-ro, Jongno-gu, Seoul, 03080, Korea
| | - Truc Thi Hoang Nguyen
- Department of Oral and Maxillofacial Surgery, Dental Research Institute, School of Dentistry, Seoul National University, 101 Daehak-ro, Jongno-gu, Seoul, 03080, Korea
| | - Myung-Joo Kim
- Department of Prosthodontics, Dental Research Institute, School of Dentistry, Seoul National University, Seoul, Korea
| | - Soung Min Kim
- Department of Oral and Maxillofacial Surgery, Dental Research Institute, School of Dentistry, Seoul National University, 101 Daehak-ro, Jongno-gu, Seoul, 03080, Korea.
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Li L, Fang J, Liu Y, Xiao L. LncRNA LOC100506178 promotes osteogenic differentiation via regulating miR-214-5p-BMP2 axis in human bone marrow mesenchymal stem cells. PeerJ 2020; 8:e8909. [PMID: 32328347 PMCID: PMC7166045 DOI: 10.7717/peerj.8909] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2019] [Accepted: 03/14/2020] [Indexed: 02/05/2023] Open
Abstract
Osteogenic differentiation is an important role in dental implantation. Long no coding RNAs (lncRNAs) are a novel class of noncoding RNAs that have significant effects in a variety of diseases. However, the function and mechanisms of LOC100506178 in osteogenic differentiation and migration of bone morphogenetic protein 2 (BMP2)-induced osteogenic differentiation of human bone marrow mesenchymalstem cells (hBMSCs) remain largely unclear. BMP2 was used to induce osteogenic differentiation of hBMSCs. Quantitative real time PCR (qRT-PCR) was used to examine the expression of LOC100506178, miR-214-5p, Runt-related transcription factor 2 (RUNX2), Osterix (Osx), and Alkaline Phosphatase (ALP) in BMP2-induced osteogenic differentiation of hBMSCs. The function of LOC100506178 and miR-214-5p was explored in vitro using Alizarin Red S Staining, ALP activity, as well as in vivo ectopic bone formation. Luciferase reporter assay was performed to assess the association between LOC100506178 and miR-214-5p, as well as miR-214-5p and BMP2. The miR-214-5p sponging potential of LOC100506178 was evaluated by RNA immunoprecipitation. In the present study, the expression of LOC100506178 was found to be increased in BMP2-induced osteogenic differentiation of hBMSCs, accompanied with decreased miR-214-5p expression and increased RUNX2, Osx and ALP expression. LOC100506178 significantly induced, while miR-214-5p suppressed the BMP2-induced osteogenic differentiation of hBMSCs. Mechanistically, LOC100506178 was directly bound to miR-214-5p and miR-214-5p targeted the 3′-untranslated region of BMP2 to negatively regulate its expression. In conclusion, our data indicate a novel molecular pathway LOC100506178/miR-214-5p/BMP2 in relation to hBMSCs differentiation into osteoblasts, which may facilitate bone anabolism.
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Affiliation(s)
- Lina Li
- Geriatric & VIP Department, Sichuan Academy of Medical Sciences & Sichuan Provincial People's Hospital, Chengdu, China
| | - Jie Fang
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Yi Liu
- Department of Stomatology, Sichuan Academy of Medical Sciences & Sichuan Provincial People's Hospital, Chengdu, China
| | - Li Xiao
- Department of Stomatology, Sichuan Academy of Medical Sciences & Sichuan Provincial People's Hospital, Chengdu, China
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Retrospective assessment of dental implant-related perforations of relevant anatomical structures and inadequate spacing between implants/teeth using cone-beam computed tomography. Clin Oral Investig 2020; 24:3281-3288. [PMID: 31960132 DOI: 10.1007/s00784-020-03205-8] [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: 08/12/2019] [Accepted: 01/07/2020] [Indexed: 12/17/2022]
Abstract
OBJECTIVES To assess the prevalence of dental implant-related perforations of relevant anatomical structures and inadequate spacing between the implant and the adjacent tooth or implant, and their association with anatomical location, implant dimension, thread exposure, and presence of graft, using cone beam computed tomography (CBCT). MATERIALS AND METHODS CBCT scans of patients with implants were retrospectively assessed regarding the presence of implant-related perforation of adjacent anatomical structures, and inadequate mesial and distal spacing between the implant and the adjacent tooth/implant (i.e., < 1 mm or < 3 mm, respectively). Implants were classified according to anatomical location, dimensions, thread exposure, and the presence of graft (i.e., bone graft or bone substitutes). Prevalence of perforations and inadequate spacing was compared among the different implant classifications (Chi-squared test). Significance level was set at 5%. RESULTS A total of 1109 implants were assessed, out of which 369 (33.3%) presented perforation of adjacent structures. Prevalence of perforations in the maxilla (43.5%) was higher than in the mandible (11.3%). Inadequate spacing was found in 18.2% of the mesial and distal measurements, which was more prevalent in the maxilla (p < 0.001). Implants perforating adjacent structures or placed with inadequate spacing presented higher prevalence of thread exposure (p < 0.001). No significant difference was found between the presence of perforations or inadequate spacing and presence of graft (p > 0.05). CONCLUSIONS Implant-related perforations of relevant anatomical structures and inadequate spacing between the implant and the adjacent tooth/implant are relatively prevalent and more common in the maxilla. Both are associated with threads exposure. CLINICAL RELEVANCE Information on dental implant-related perforations and inadequate spacing can assist dental surgeons in pre-surgical planning.
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Romanos GE, Delgado-Ruiz R, Sculean A. Concepts for prevention of complications in implant therapy. Periodontol 2000 2019; 81:7-17. [PMID: 31407435 DOI: 10.1111/prd.12278] [Citation(s) in RCA: 69] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The use of dental implants is nowadays a well-accepted and highly predictable treatment modality for restoring the dentition and reestablishing the masticatory function of edentulous and partially edentulous patients. Despite the high predictability and excellent long-term survival rates reported for implant therapy, complications may still occur and can jeopardize both short- and long-term success. The present paper provides an overview on the most important aspects related to the etiology, prevention, and management of complications associated with implant therapy. Data from the literature indicate that a number of factors, such as surgical trauma, implant diameter, type of implant-abutment connection, abutment disconnection and reconnection, presence of microgap, and implant malpositioning, can substantially influence the biologic processes of bone remodeling and biofilm formation, thus increasing the rate of short- and long-term hard- and soft-tissue complications. Other factors, such as excess cement at cement-retained prosthetic restorations, abutment mobility, and infections (e.g. peri-implant mucositis and peri-implantitis) caused by bacterial biofilm, are further causes for complications and failures. More recent evidence also indicates that besides the need for sufficient bone volume surrounding the implant, the presence of an adequate width and thickness of attached mucosa may improve biofilm control and limit crestal bone resorption. Furthermore, emerging evidence points also to the pivotal role of human factors as one of the most important causes of complications in implant dentistry. It can be concluded that clinicians need to consider all biologic and biomechanical factors affecting implant placement and survival, as well as undergo adequate training to improve their surgical skills to control and prevent implant complications. Careful patient selection and control of environmental and systemic factors, such as smoking, diabetes etc., coupled with an accurate surgical and prosthetic planning, enable a better prevention and control of infections.
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Affiliation(s)
- Georgios E Romanos
- Department of Periodontology, School of Dental Medicine, Stony Brook University, Stony Brook, New York, USA
| | - Rafael Delgado-Ruiz
- Department of Prosthodontics and Digital Technology, School of Dental Medicine, Stony Brook University, Stony Brook, New York, USA
| | - Anton Sculean
- Department of Periodontology, University of Bern, Bern, Switzerland
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Bonfante EA, Jimbo R, Witek L, Tovar N, Neiva R, Torroni A, Coelho PG. Biomaterial and biomechanical considerations to prevent risks in implant therapy. Periodontol 2000 2019; 81:139-151. [PMID: 31407440 DOI: 10.1111/prd.12288] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
This paper is aimed to present a biomaterials perspective in implant therapy that fosters improved bone response and long-term biomechanical competence from surgical instrumentation to final prosthetic rehabilitation. Strategies to develop implant surface texturing will be presented and their role as an ad hoc treatment discussed in light of the interplay between surgical instrumentation and implant macrogeometric configuration. Evidence from human retrieved implants in service for several years and from in vivo studies will be used to show how the interplay between surgical instrumentation and implant macrogeometry design affect osseointegration healing pathways, and bone morphologic and long-term mechanical properties. Also, the planning of implant-supported prosthetic rehabilitations targeted at long-term performance will be appraised from a standpoint where personal preferences (eg, cementing or screwing a prosthesis) can very often fail to deliver the best patient care. Lastly, the acknowledgement that every rehabilitation will have its strength degraded over time once in function will be highlighted, since the potential occurrence of even minor failures is rarely presented to patients prior to treatment.
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Affiliation(s)
- Estevam A Bonfante
- Department of Prosthodontics and Periodontology, University of São Paulo Bauru School of Dentistry, Bauru, Brazil
| | - Ryo Jimbo
- Department of Applied Prosthodontics, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Lukasz Witek
- Department of Biomaterials, New York University, New York City, New York, USA
| | - Nick Tovar
- Department of Biomaterials, New York University, New York City, New York, USA
| | - Rodrigo Neiva
- Department of Periodontology, University of Florida at Gainesville, Gainesville, Florida, USA
| | - Andrea Torroni
- Attending Oral and Maxillofacial Surgery, Hansjörg Wyss Department of Plastic Surgery, New York University Langone Medical Center, New York City, New York, USA
| | - Paulo G Coelho
- Department of Biomaterials, Hansjörg Wyss Department of Plastic Surgery, Mechanical and Aerospace Engineering, New York University, New York City, New York, USA
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22
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Ma M, Qi M, Zhang D, Liu H. The Clinical Performance of Narrow Diameter Implants Versus Regular Diameter Implants: A Meta-Analysis. J ORAL IMPLANTOL 2019; 45:503-508. [PMID: 31536434 DOI: 10.1563/aaid-joi-d-19-00025] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The purpose of this study is to analyze 1- and 3-year clinical performances of narrow diameter implants (NDIs) versus regular diameter implants (RDIs). A search of electronic databases and a manual search was performed for the time period January 2000 to April 2018. A meta-regression was used to evaluate the effects of the "fixed effects" model on the implant survival rates, prosthesis success rates and marginal bone loss (MBL) with follow-up time of 1 year and 3 years. Of the 11 studies included, the overall combined 1-year implant survival rates were 98.14% for NDIs and 98.20% for RDIs. The overall combined 3-year implant survival rates were 98.71% for NDIs and 98.84% for RDIs. The corresponding values for 1-year prosthesis success rates were 96.94% for NDIs and 99.25% for RDIs. The corresponding values for 3-year prosthesis success rates were 89.25% for NDIs and 96.55% for RDIs. The meta-regression showed no significant differences between NDIs and RDIs regarding implant survival rates, prosthesis success rates, and MBL in 1-year and 3-year follow-up (P > .05). The results of this meta-analysis concluded that the implant diameter did not affect its survival rates, prosthesis success rates, and MBL in 1 and 3 years. The use of NDIs instead of bone augmentation procedures with RDIs did not affect its survival rates, prosthesis success rates, and MBL in the short-term and middle-term. However, more high-quality randomized controlled trials and long follow-up studies are needed on this topic.
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Affiliation(s)
- Meng Ma
- Department of Stomatology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, China.,Institute of Stomatology, Chinese People's Liberation Army General Hospital, Beijing, China
| | - Mengxing Qi
- Department of Stomatology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, China
| | - Dongsheng Zhang
- Department of Stomatology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, China
| | - Hongchen Liu
- Institute of Stomatology, Chinese People's Liberation Army General Hospital, Beijing, China
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23
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Demirkol N, Demirkol M. The Diameter and Length Properties of Single Posterior Dental Implants: A Retrospective Study. CUMHURIYET DENTAL JOURNAL 2019. [DOI: 10.7126/cumudj.541657] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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24
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Romanos GE, Bastardi DJ, Kakar A, Moore R, Delgado-Ruiz RA, Javed F. In vitro comparison of resonance frequency analysis devices to evaluate implant stability of narrow diameter implants at varying drilling speeds in dense artificial bone blocks. Clin Implant Dent Relat Res 2019; 21:1023-1027. [PMID: 31464362 DOI: 10.1111/cid.12842] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2019] [Revised: 07/12/2019] [Accepted: 08/09/2019] [Indexed: 12/21/2022]
Abstract
BACKGROUND There are no studies that have assessed the implant stability quotient (ISQ) values of narrow diameter implants placed in artificial dense bone blocks at varying drilling speeds (DSs). PURPOSE The aim of the present in vitro experiment was to compare the performance of OSSTELL and Penguin devices to evaluate implant stability at DSs of 800 and 2000 rpm. MATERIALS AND METHODS A total of 360 osteotomies were created in dense artificial bone blocks at DSs of 800 and 2000 rpm. Dental implants from three manufacturers (group-1: NobelActive implants, Nobel Biocare, Yorba Linda, California; group-2: Zimmer, Eztetic-Zimmer implants, Zimmer Biomet Dental, Palm Beach Gardens, Florida; and group-3: Astra Tech implant system, Dentsply Sirona, York, Pennsylvania) were randomly placed in these osteotomies using an insertion torque of 15 Ncm (60 implants/group). Implant stability in all bone blocks immediately following implant placement was evaluated using the OSSTELL and Penguin devices. ISQ values were presented as means ± SD. Statistical significance was set at P < .05. RESULTS There was no significant difference in the ISQ values obtained from the OSSTELL and Penguin devices for implants in groups 1, 2, and 3. There was no significant difference when ISQ values obtained from the OSSTELL device were compared with the Penguin device for narrow diameter dental implants placed in dense bone blocks with osteotomies performed at 800 and 2000 rpm. ISQ values showed statistically significant higher values for OSSTELL compared to Penguin device. CONCLUSION The OSSTELL and Penguin devices are reliable for the assessment of implant stability in dense artificial bone. Implant design and site-DS does not seem to have a significant impact of implant stability in artificial dense bone blocks.
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Affiliation(s)
- Georgios E Romanos
- Department of Periodontology, Laboratory for Periodontal-, Implant-, Phototherapy (LA-PIP), School of Dental Medicine, Stony Brook University, Stony Brook, New York.,Department of Oral Surgery and Implant Dentistry, Dental School, Johann Wolfgang Goethe University, Frankfurt, Germany
| | - Daniel J Bastardi
- Department of Periodontology, Laboratory for Periodontal-, Implant-, Phototherapy (LA-PIP), School of Dental Medicine, Stony Brook University, Stony Brook, New York
| | - Apoorv Kakar
- Department of Periodontology, Laboratory for Periodontal-, Implant-, Phototherapy (LA-PIP), School of Dental Medicine, Stony Brook University, Stony Brook, New York
| | - Rachel Moore
- Department of Periodontology, Laboratory for Periodontal-, Implant-, Phototherapy (LA-PIP), School of Dental Medicine, Stony Brook University, Stony Brook, New York
| | - Rafael A Delgado-Ruiz
- Department of Prosthodontics and Digital Technology, School of Dental Medicine, Stony Brook University, Stony Brook, New York
| | - Fawad Javed
- Department of Periodontology, Laboratory for Periodontal-, Implant-, Phototherapy (LA-PIP), School of Dental Medicine, Stony Brook University, Stony Brook, New York.,Department of Orthodontics, Eastman Institute for Oral Health, University of Rochester, Rochester, New York
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25
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Wu Y, Feng F, Xin H, Li K, Tang Z, Guo Y, Qin D, An B, Diao X, Dou C. Fracture Strength and Osseointegration of an Ultrafine-Grained Titanium Mini Dental Implant after Macromorphology Optimization. ACS Biomater Sci Eng 2019; 5:4122-4130. [DOI: 10.1021/acsbiomaterials.9b00406] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yulu Wu
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Stomatology, Department of Prosthodontics, School of Stomatology, The Fourth Military Medical University, Xi’an 710032, China
| | - Fan Feng
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Stomatology, Department of Prosthodontics, School of Stomatology, The Fourth Military Medical University, Xi’an 710032, China
| | - Haitao Xin
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Stomatology, Department of Prosthodontics, School of Stomatology, The Fourth Military Medical University, Xi’an 710032, China
| | - Kai Li
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Stomatology, Department of Prosthodontics, School of Stomatology, The Fourth Military Medical University, Xi’an 710032, China
| | - Zhongbin Tang
- School of Aeronautics, Northwestern Polytechnical University, Xi’an 710072, China
| | - Yazhou Guo
- School of Aeronautics, Northwestern Polytechnical University, Xi’an 710072, China
| | - Dongyang Qin
- School of Aeronautics, Northwestern Polytechnical University, Xi’an 710072, China
| | - Baili An
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Stomatology, Department of Prosthodontics, School of Stomatology, The Fourth Military Medical University, Xi’an 710032, China
| | - Xiaoou Diao
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Stomatology, Department of Prosthodontics, School of Stomatology, The Fourth Military Medical University, Xi’an 710032, China
| | - Chenyun Dou
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Stomatology, Department of Prosthodontics, School of Stomatology, The Fourth Military Medical University, Xi’an 710032, China
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26
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Romanos GE, Bastardi DJ, Moore R, Kakar A, Herin Y, Delgado-Ruiz RA. In Vitro Effect of Drilling Speed on the Primary Stability of Narrow Diameter Implants with Varying Thread Designs Placed in Different Qualities of Simulated Bone. MATERIALS 2019; 12:ma12081350. [PMID: 31027206 PMCID: PMC6515434 DOI: 10.3390/ma12081350] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/24/2019] [Revised: 04/16/2019] [Accepted: 04/19/2019] [Indexed: 01/08/2023]
Abstract
It is hypothesized that there is no statistically significant impact of drilling speed (DS) on the primary stability (PS) of narrow-diameter implants (NDIs) with varying thread designs placed in dense and soft simulated bone. The aim of this in vitro study was to evaluate the impact of DS on the PS of NDIs with varying thread designs placed in dense and soft simulated bone. Two hundred and forty osteotomies for placement of various implant macro-designs were divided into three groups (80 implants per group): Group A (NobelActive, 3.0/11.5 mm); Group B (Astra OsseoSpeed-EV, 3.0/11 mm); and Group C (Eztetic-Zimmer, 3.1/11.5 mm) implants. These implants were placed in artificial dense and soft simulated bone using DSs of 800 and 2000 revolutions per minute (RPM). Resonance frequency analysis (RFA) and implant stability quotient (ISQ) were assessed. Group comparisons were performed using the one-way analysis of variance with Tukey’s post hoc tests. Level of significance was set at P < 0.05. In groups A and B, there was no difference in the ISQ for NDIs inserted in dense bone at 800 and 2000 RPM. In Group C, ISQ was significantly higher for NDIs placed in dense bone at 800 PRM compared to 2000 RPM (P < 0.05). In Group A, ISQ values were significantly higher for NDIs inserted in soft bone at 2000 RPM as compared to those inserted at 800 RPM (P < 0.05). For NDIs, a lower drilling speed in dense artificial simulated bone and a higher drilling speed in soft artificial simulated bone is associated with high primary stability.
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Affiliation(s)
- Georgios E Romanos
- Department of Periodontology, Laboratory for Periodontal-, Implant-, Phototherapy (LA-PIP), School of Dental Medicine, Stony Brook University, Stony Brook, New York, NY 11794, USA.
| | - Daniel J Bastardi
- Department of Periodontology, Laboratory for Periodontal-, Implant-, Phototherapy (LA-PIP), School of Dental Medicine, Stony Brook University, Stony Brook, New York, NY 11794, USA.
| | - Rachel Moore
- Department of Periodontology, Laboratory for Periodontal-, Implant-, Phototherapy (LA-PIP), School of Dental Medicine, Stony Brook University, Stony Brook, New York, NY 11794, USA.
| | - Apoorv Kakar
- Department of Periodontology, Laboratory for Periodontal-, Implant-, Phototherapy (LA-PIP), School of Dental Medicine, Stony Brook University, Stony Brook, New York, NY 11794, USA.
| | - Yaro Herin
- Department of Periodontology, Laboratory for Periodontal-, Implant-, Phototherapy (LA-PIP), School of Dental Medicine, Stony Brook University, Stony Brook, New York, NY 11794, USA.
| | - Rafael A Delgado-Ruiz
- Department of Prosthodontics and Digital Technology, School of Dental Medicine, Stony Brook University, Stony Brook, New York, NY 11794, USA.
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27
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Lee DW, Kim NH, Lee Y, Oh YA, Lee JH, You HK. Implant fracture failure rate and potential associated risk indicators: An up to 12-year retrospective study of implants in 5,124 patients. Clin Oral Implants Res 2019; 30:206-217. [PMID: 30672029 DOI: 10.1111/clr.13407] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2018] [Revised: 01/12/2019] [Accepted: 01/15/2019] [Indexed: 12/16/2022]
Abstract
OBJECTIVES This study investigated fracture rates and risk indicators for fractures in internal connection dental implants. MATERIAL AND METHODS We performed a retrospective analysis of 19,006 internal connection implants used in fixed restoration in 5,124 patients (4,570 males, 554 females) at the Dental Hospital of Veterans Health Service Medical Center between 2006 and 2015. Patients were followed through June 2018 (0.03-12.39 years post-installation). Clinical factors (age, sex, implant diameter, implant length, placement site, bone graft, fixture material, cervical feature, abutment connection, microthread, and platform switching) were recorded. Kaplan-Meier survival analysis identified risk indicators associated with an implant fracture. Cox regression models elucidated potential fracture risks. RESULTS One hundred and seventy-four implants fractured in 135 patients, for an incidence rate of 0.92% after an average of 4.95 ± 2.14 years of use. Kaplan-Meier estimates showed that the 3-, 5-, and 10-year survival rates of implants were 99.8%, 99.2%, and 97.7%, respectively. In the multivariable Cox regression model, the diameter, location, history of bone graft, and microthread presence were significantly correlated with implant fractures. Wide-diameter implants had a reduced fracture risk within 90 months, after which the diameter did not correlate with fractures. Implants placed in the anterior mandible had a lower fracture risk within 90 months; mandibular premolar implants corresponded with a lower risk after 90 months. Implants without a history of bone graft or microthreads were more likely to fracture throughout the follow-up time. CONCLUSIONS These results elucidate risk indicators for implant fractures and facilitate their reduction in clinical practice.
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Affiliation(s)
- Dong-Woon Lee
- Department of Periodontology, Veterans Health Service Medical Center, Seoul, Republic of Korea
| | - Na-Hong Kim
- Department of Prosthodontics, Veterans Health Service Medical Center, Seoul, Republic of Korea
| | - Young Lee
- Research Institute of Veterans Health Service Medical Center, Seoul, Republic of Korea
| | - Yeon-Ah Oh
- Department of Periodontology, Veterans Health Service Medical Center, Seoul, Republic of Korea
| | - Jae-Hong Lee
- Department of Periodontology, Daejeon Dental Hospital, Wonkwang University, Daejeon, Republic of Korea
| | - Hyung-Keun You
- Department of Periodontology, School of Dentistry, Wonkwang University, Iksan, Republic of Korea
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28
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Alrabiah M. Comparison of survival rate and crestal bone loss of narrow diameter dental implants versus regular dental implants: A systematic review and meta-analysis. ACTA ACUST UNITED AC 2018; 10:e12367. [DOI: 10.1111/jicd.12367] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2018] [Accepted: 06/29/2018] [Indexed: 01/11/2023]
Affiliation(s)
- Mohammed Alrabiah
- Department of Prosthetic Dental Science; College of Dentistry; King Saud University; Riyadh Saudi Arabia
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29
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Cruz RS, Lemos CADA, Batista VEDS, Oliveira HFFE, Gomes JMDL, Pellizzer EP, Verri FR. Short implants versus longer implants with maxillary sinus lift. A systematic review and meta-analysis. Braz Oral Res 2018; 32:e86. [PMID: 30231176 DOI: 10.1590/1807-3107bor-2018.vol32.0086] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2017] [Accepted: 07/17/2018] [Indexed: 11/22/2022] Open
Abstract
This study compared the survival rate of dental implants, amount of marginal bone loss, and rates of complications (biological and prosthetic) between short implants and long implants placed after maxillary sinus augmentation. This systematic review has been registered at PROSPERO under the number (CRD42017073929). Two reviewers searched the PubMed/MEDLINE, Embase, LILACS, and Cochrane Library databases. Eligibility criteria included randomized controlled trials, comparisons between short implants and long implants placed after maxillary sinus augmentation in the same study, and follow-up for >6 months. The Cochrane Collaboration's tool for assessing the risk of bias in randomized trials was used to assess the quality and risk of bias of the included studies. The search identified 1366 references. After applying the inclusion criteria, 11 trials including 420 patients who received 911 dental implants were considered eligible. No significant difference was observed in the survival rate [p = 0.86; risk ratio (RR): 1.08; 95% confidence interval (CI): 0.46-2.52] or in the amount of marginal bone loss (p = 0.08; RR: -0.05; 95%CI: -0.10 to 0.01). However, higher rates of biological complications for long implants associated with maxillary sinus augmentation were observed (p < 0.00001; RR: 0.21; 95%CI: 0.10-0.41), whereas a higher prosthetic complication rate for short implants was noted (p = 0.010; RR: 3.15; 95%CI: 1.32-7.51). Short implant placement is an effective alternative because of fewer biological complications and similar survival and marginal bone loss than long implant placement with maxillary sinus augmentation. However, the risk of mechanical complications associated with the prostheses fitted on short implants should be considered.
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Affiliation(s)
- Ronaldo Silva Cruz
- Department of Dental Materials and Prosthodontics, Aracatuba Dental School, Universidade de São Paulo, Araçatuba, SP, Brazil
| | | | - Victor Eduardo de Souza Batista
- Department Prosthodontics, Presidente Prudente Dental School, Universidade do Oeste Paulista, Presidente Prudente, SP, Brazil
| | | | - Jéssica Marcela de Luna Gomes
- Department of Dental Materials and Prosthodontics, Aracatuba Dental School, Universidade de São Paulo, Araçatuba, SP, Brazil
| | - Eduardo Piza Pellizzer
- Department of Dental Materials and Prosthodontics, Aracatuba Dental School, Universidade de São Paulo, Araçatuba, SP, Brazil
| | - Fellippo Ramos Verri
- Department of Dental Materials and Prosthodontics, Aracatuba Dental School, Universidade de São Paulo, Araçatuba, SP, Brazil
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Abstract
Systematic reviews of literature over the period between 2008 and 2017 are discussed regarding clinical evidence for the factors affecting survival and failure of dental implants. The factors addressed include publication bias, tooth location, insertion torque, collar design, implant-abutment connection design, implant length, implant width, bone augmentation, platform switching, surface roughness, implant coatings, and the use of ceramic materials in the implant body and abutment.
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Affiliation(s)
- Jason A Griggs
- Biomedical Materials Science, The University of Mississippi Medical Center School of Dentistry, 2500 North State Street, Room D528, Jackson, MS 39216-4505, USA.
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31
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Role of Osteogenic Coatings on Implant Surfaces in Promoting Bone-To-Implant Contact in Experimental Osteoporosis: A Systematic Review and Meta-Analysis. IMPLANT DENT 2018; 26:770-777. [PMID: 28767464 DOI: 10.1097/id.0000000000000634] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
OBJECTIVE The aim of this systematic review and meta-analysis was to evaluate the role of osteogenic coatings (placement of a thin film of organic and inorganic osteoinductive and osteoproliferative materials) on implant surfaces in augmenting bone-to-implant contact (BIC) in osteoporotic bone. DATA SOURCES To answer the focused question "Do osteogenic coatings on implant surfaces increase BIC in osteoporotic bone?" PubMed/MEDLINE, EMBASE, ISI Web of Knowledge, Scopus, and Google-Scholar databases were searched till June 2017 using different combinations of the following key words: bone-to-implant contact, coating, implant surface, osseointegration, and osteoporosis. Letters to the Editor, review articles, case-reports/case-series, and commentaries were excluded. RESULTS Six animal studies were included, in which osteoporosis was induced by bilateral ovariectomy. In all studies, implant surface roughness was increased by various osteogenic surface coatings including alumina, hydroxyapatite, calcium phosphate, and zoledronic acid. Five studies showed that bone volume and BIC are significantly higher around implants with coated surfaces than noncoated implants. In 1 study, there was no difference in BIC around coated and noncoated implants. CONCLUSION Although experimental studies have shown that osteogenic coatings are effective in enhancing BIC, their clinical relevance requires further investigations.
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de Souza AB, Sukekava F, Tolentino L, César-Neto JB, Garcez-Filho J, Araújo MG. Narrow- and regular-diameter implants in the posterior region of the jaws to support single crowns: A 3-year split-mouth randomized clinical trial. Clin Oral Implants Res 2017; 29:100-107. [DOI: 10.1111/clr.13076] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/07/2017] [Indexed: 12/20/2022]
Affiliation(s)
| | - Flávia Sukekava
- Division of Periodontics; School of Dentistry; University of São Paulo; São Paulo Brazil
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Iegami CM, Uehara PN, Sesma N, Pannuti CM, Tortamano Neto P, Mukai MK. Survival rate of titanium-zirconium narrow diameter dental implants versus commercially pure titanium narrow diameter dental implants: A systematic review. Clin Implant Dent Relat Res 2017; 19:1015-1022. [DOI: 10.1111/cid.12527] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2017] [Revised: 07/26/2017] [Accepted: 07/31/2017] [Indexed: 12/11/2022]
Affiliation(s)
- Carolina Mayumi Iegami
- Department of Prosthodontics; University of Sao Paulo, School of Dentistry, Sao Paulo; Brazil
| | | | - Newton Sesma
- Department of Prosthodontics; University of Sao Paulo, School of Dentistry, Sao Paulo; Brazil
| | | | - Pedro Tortamano Neto
- Department of Prosthodontics; University of Sao Paulo, School of Dentistry, Sao Paulo; Brazil
| | - Márcio Katsuyoshi Mukai
- Department of Prosthodontics; University of Sao Paulo, School of Dentistry, Sao Paulo; Brazil
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Li X, Xu P, Xu X, Liu S. The application of a delayed expansion technique for horizontal alveolar ridge augmentation in dental implantation. Int J Oral Maxillofac Surg 2017; 46:1451-1457. [PMID: 28663017 DOI: 10.1016/j.ijom.2017.05.025] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2016] [Revised: 03/27/2017] [Accepted: 05/26/2017] [Indexed: 11/18/2022]
Abstract
The aim of this study was to evaluate the application of delayed expansion of the alveolar ridge in dental implantation. This method avoids the need to harvest autogenous bone and the requirement to fix a block with screws, and could help prevent the uncontrolled fracture and avascular necrosis that may result from the traditional alveolar split. Eighteen patients and 43 implants were included in this retrospective study. The width of the alveolar ridge was measured before implantation, immediately after implantation, and after the final restoration. The width increased significantly after the insertion of implants and decreased slightly after bone remodelling. Overall, the width of the alveolar ridge increased by 2.37±1.44mm on average, ranging from -0.20mm to 5.75mm. The results suggest the use of delayed expansion for horizontal alveolar bone augmentation; however, the maxillary premolar area may not be a suitable site.
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Affiliation(s)
- X Li
- Department of Oral Implantation, Affiliated Haikou Hospital, Xiangya Medical School, Central South University, Hainan Provincial Stomatology Centre, Haikou, China
| | - P Xu
- Department of Oral Implantation, Affiliated Haikou Hospital, Xiangya Medical School, Central South University, Hainan Provincial Stomatology Centre, Haikou, China.
| | - X Xu
- Department of Oral and Maxillofacial Surgery, Kunming Medical University, Kunming, China
| | - S Liu
- Department of Oral Implantation, Affiliated Haikou Hospital, Xiangya Medical School, Central South University, Hainan Provincial Stomatology Centre, Haikou, China
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35
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Ramírez Fernández MP, Gehrke SA, Mazón P, Calvo-Guirado JL, De Aza PN. Implant Stability of Biological Hydroxyapatites Used in Dentistry. MATERIALS (BASEL, SWITZERLAND) 2017; 10:E644. [PMID: 28773005 PMCID: PMC5554025 DOI: 10.3390/ma10060644] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/08/2017] [Revised: 05/31/2017] [Accepted: 06/09/2017] [Indexed: 11/17/2022]
Abstract
The aim of the present study was to monitor implant stability after sinus floor elevation with two biomaterials during the first six months of healing by resonance frequency analysis (RFA), and how physico-chemical properties affect the implant stability quotient (ISQ) at the placement and healing sites. Bilateral maxillary sinus augmentation was performed in 10 patients in a split-mouth design using a bobine HA (BBM) as a control and porcine HA (PBM). Six months after sinus lifting, 60 implants were placed in the posterior maxilla. The ISQ was recorded on the day of surgery from RFA at T1 (baseline), T2 (three months), and T3 (six months). Statistically significant differences were found in the ISQ values during the evaluation period. The ISQ (baseline) was 63.8 ± 2.97 for BBM and 62.6 ± 2.11 for PBM. The ISQ (T2) was ~73.5 ± 4.21 and 67 ± 4.99, respectively. The ISQ (T3) was ~74.65 ± 2.93 and 72.9 ± 2.63, respectively. All of the used HAs provide osseointegration and statistical increases in the ISQ at baseline, T2 and T3 (follow-up), respectively. The BBM, sintered at high temperature with high crystallinity and low porosity, presented higher stability, which demonstrates that variations in the physico-chemical properties of a bone substitute material clearly influence implant stability.
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Affiliation(s)
- Maria Piedad Ramírez Fernández
- Cátedra Internacional de Investigación en Odontología, Universidad Católica San Antonio de Murcia, Avda. Jerónimos, 135, 30107 Guadalupe, Spain.
| | - Sergio A Gehrke
- Biotecnos Research Center, Rua Dr. Bonazo No. 57, Santa Maria 97015-001, Brasil.
| | - Patricia Mazón
- Departamento de Materiales, Óptica y Tecnologia Electrónica, Universidad Miguel Hernández, Avda. Universidad s/n, 03202 Elche, Spain.
| | - Jose L Calvo-Guirado
- Cátedra Internacional de Investigación en Odontología, Universidad Católica San Antonio de Murcia, Avda. Jerónimos, 135, 30107 Guadalupe, Spain.
| | - Piedad N De Aza
- Instituto de Bioingenieria, Universidad Miguel Hernandez, Avda. Ferrocarril s/n, 03202 Elche, Spain.
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Use of rhBMP-2/β-TCP for Interpositional Vertical Grafting Augmentation: 5.5-Year Follow-up Clinically and Histologically. IMPLANT DENT 2017; 24:349-53. [PMID: 25915407 DOI: 10.1097/id.0000000000000245] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
PURPOSE This case report documented long-term results using rh-BMP-2/β-tricalcium phosphate (TCP) for vertical grafting augmentation. MATERIALS AND METHODS A 58-year-old patient with extreme atrophy of the left posterior mandible was treated with rh-BMP-2/β-TCP for vertical bone augmentation. At the time of implant placement, bone biopsy was performed for histological evaluation. RESULTS Seven months after surgery, CT scan demonstrated approximately 8 mm of bone gain height. The histological results revealed a newly formed vital bone tissue, predominantly lamellar with variable density. Remaining bone ceramic surrounded by newly formed bone tissue or connective tissue was observed. The bone levels remained unchanged during the entire period treatment (5.5 years). CONCLUSION This technique has demonstrated a potential for reconstruction of atrophic sites when vertical bone gain is desirable. Moreover, the bone gain has shown long-term maintenance without resorption. Future long-term prospective clinical trials are needed to confirm these findings.
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Ko YC, Huang HL, Shen YW, Cai JY, Fuh LJ, Hsu JT. Variations in crestal cortical bone thickness at dental implant sites in different regions of the jawbone. Clin Implant Dent Relat Res 2017; 19:440-446. [PMID: 28074591 DOI: 10.1111/cid.12468] [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: 08/30/2016] [Revised: 10/20/2016] [Accepted: 11/19/2016] [Indexed: 01/06/2023]
Abstract
BACKGROUND Dental implants have become reliable and predictable tools for treating missing teeth. The survival rate of dental implants is markedly influenced by the host bone quality and quantity of the jawbone. A better host bone provides higher initial stability of the dental implant, resulting in better osseointegration and a higher success rate. Host bone quality and quantity are determined by the crestal cortical bone thickness and inner cancellous bone density. OBJECTIVE The purpose of this study was to determine the crestal cortical bone thickness at dental implant sites in different regions of the jawbone through the use of dental cone-beam computed tomographic (CBCT) images. MATERIALS AND METHODS A total of 661 dental implant sites (81 in the anterior mandible, 122 in the anterior maxilla, 224 in the posterior mandible, and 234 in the posterior maxilla) were obtained from the jawbones of 173 humans. The data were subjected to statistical analysis to determine any correlation between crestal cortical bone thicknesses and jawbone regions using one-way analysis of variance with Tukey's post-test. RESULTS The crestal cortical bone thicknesses at dental implant sites in the four regions decreased in the following order: posterior mandible (1.07 ± 0.47 mm, mean ± SD) >anterior mandible (0.99 ± 0.36 mm) >anterior maxilla (0.82 ± 0.30 mm) >posterior maxilla (0.75 ± 0.35 mm). CONCLUSION The dental CBCT data demonstrate that crestal cortical bone thickness varies markedly between dental implant sites in the four regions of the jawbone.
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Affiliation(s)
- Yi-Chun Ko
- School of Dentistry, College of Medicine, China Medical University, Taichung, 404, Taiwan
| | - Heng-Li Huang
- School of Dentistry, College of Medicine, China Medical University, Taichung, 404, Taiwan.,Department of Bioinformatics and Medical Engineering, Asia University, Taichung, 413, Taiwan
| | - Yen-Wen Shen
- School of Dentistry, College of Medicine, China Medical University, Taichung, 404, Taiwan.,Department of Dentistry, China Medical University and Hospital, Taichung, 404, Taiwan
| | - Jyun-Yi Cai
- School of Dentistry, College of Medicine, China Medical University, Taichung, 404, Taiwan.,Department of Dentistry, China Medical University and Hospital, Taichung, 404, Taiwan
| | - Lih-Jyh Fuh
- School of Dentistry, College of Medicine, China Medical University, Taichung, 404, Taiwan.,Department of Dentistry, China Medical University and Hospital, Taichung, 404, Taiwan
| | - Jui-Ting Hsu
- School of Dentistry, College of Medicine, China Medical University, Taichung, 404, Taiwan.,Department of Bioinformatics and Medical Engineering, Asia University, Taichung, 413, Taiwan
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Kim YH, Choi NR, Kim YD. The factors that influence postoperative stability of the dental implants in posterior edentulous maxilla. Maxillofac Plast Reconstr Surg 2017; 39:2. [PMID: 28101497 PMCID: PMC5218953 DOI: 10.1186/s40902-016-0100-2] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2016] [Accepted: 12/21/2016] [Indexed: 11/18/2022] Open
Abstract
Background All clinicians are aware of the difficulty of installing a dental implant in posterior maxilla because of proximate position of maxillary sinus, insufficient bone width, and lower bone density. This study is to examine which factors will make the implantation in the posterior maxilla more difficult, and which factors will affect the postoperative implant stability in this region. Methods Five hundred seventy-three fixtures on the maxilla posterior were included for this study from all the patients who underwent an installation of the dental implant fixture from January 2010 to December 2014 at the Department of Oral and Maxillofacial Surgery in Pusan National University Dental Hospital (Yangsan, Korea). The postoperative implant stability quotient (ISQ) value, fixture diameter and length, presence of either bone graft or sinus lift, and graft material were included in the reviewed factors. The width and height of the bone bed was assessed via preoperative cone beam CT image analysis. The postoperative ISQ value was taken just before loading by using the OsstellTM mentor® (Integration Diagnostics AB, Gothenburg, Sweden). The t test and ANOVA methods were used in the statistical analysis of the data. Results Mean ISQ of all the included data was 79.22. Higher initial bone height, larger fixture diameter, and longer fixture length were factors that influence the implant stability on the posterior edentulous maxilla. On the other hand, the initial bone width, bone graft and sinus elevation procedure, graft material, and approach method for sinus elevation showed no significant impact associated with the implant stability on the posterior edentulous maxilla. Conclusions It is recommended to install the fixtures accurately in a larger diameter and longer length by performing bone graft and sinus elevation.
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Affiliation(s)
- Yun-Ho Kim
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Pusan National University, Yangsan, Republic of Korea
| | - Na-Rae Choi
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Pusan National University, Yangsan, Republic of Korea
| | - Yong-Deok Kim
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Pusan National University, Yangsan, Republic of Korea
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Douglas de Oliveira DW, Lages FS, Lanza LA, Gomes AM, Queiroz TP, Costa FDO. Dental Implants With Immediate Loading Using Insertion Torque of 30 Ncm: A Systematic Review. IMPLANT DENT 2016; 25:675-83. [PMID: 27540837 DOI: 10.1097/id.0000000000000444] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
OBJECTIVE This study aimed to perform a review of the literature regarding the survival rate of dental implants with immediate loading using insertion torque of 30 Ncm. MATERIAL AND METHODS A systematic review was performed based on the Preferred Reporting Items for Systematic Reviews and Meta-Analyses and the Cochrane Handbook for Systematic Reviews of Interventions (PROSPERO CRD42014015323). The search was performed in the PubMed, Web of Science, Cochrane Library electronic, OVID, and Scielo databases. Manual searches were also performed. The articles identified were assessed independently by 3 researchers. Clinical trials reporting dental implants with immediate loading and 30 Ncm torque in patients ages 18 years or older were included. RESULTS The searches yielded 589 studies. Six studies were included in the systematic review. The survival rate of dental implants was 96.8%. Three studies showed a low potential risk of bias. CONCLUSION There is not strong evidence that insertion torque of 30 Ncm is enough for implant survival in cases of immediate loading.
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Affiliation(s)
- Dhelfeson Willya Douglas de Oliveira
- *PhD Student, Department of Periodontology, School of Dentistry, Federal University of Minas Gerais, Belo Horizonte, Brazil. †Professor, Implantology Post-Graduation Program, University Center of Araraquara, Araraquara, Brazil. ‡Professor, Department of Periodontology, School of Dentistry, Federal University of Minas Gerais, Belo Horizonte, Brazil
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Pommer B, Busenlechner D, Fürhauser R, Watzek G, Mailath-Pokorny G, Haas R. Trends in techniques to avoid bone augmentation surgery: Application of short implants, narrow-diameter implants and guided surgery. J Craniomaxillofac Surg 2016; 44:1630-1634. [DOI: 10.1016/j.jcms.2016.08.012] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2015] [Revised: 07/06/2016] [Accepted: 08/15/2016] [Indexed: 10/21/2022] Open
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Ku JK, Yi YJ, Yun PY, Kim YK. Retrospective clinical study of ultrawide implants more than 6 mm in diameter. Maxillofac Plast Reconstr Surg 2016; 38:30. [PMID: 27547748 PMCID: PMC4974300 DOI: 10.1186/s40902-016-0075-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2016] [Accepted: 06/27/2016] [Indexed: 11/30/2022] Open
Abstract
Background The prognosis of wide implants tends to be controversial. While wider implants were initially expected to result in a larger osseointegration area and have higher levels of primary stability, they were reported to have a relatively high rate of failure. The clinical outcome of ultrawide implants of more than 6 mm in diameter was evaluated through a retrospective study. Methods The investigation was conducted on patients who had received ultrawide implant (≥6 mm diameter) placements in Seoul National University Bundang Hospital from January 2008 to December 2013. Complications were investigated during the maintenance period, and marginal bone loss was measured using periapical radiography. Primary stability immediately after the implant placement and second stability after second surgery or during impression were measured using Osstell® Mentor (Osstell, Sweden) as an implant stability quotient (ISQ). Results Fifty-eight implants were placed in 53 patients (30 male, 23 female), and they were observed for an average of 50.06 ± 23.49 months. The average ISQ value increased from 71.22 ± 10.26 to 77.48 ± 8.98 (P < 0.005). The primary and secondary stability shows significantly higher at the mandible than at the maxilla (P < 0.001). However, mean survival rate shows 98.28 %. Average marginal bone loss of 0.018 and 0.045 mm were measured at 12 and 24 months after the loading and 0.14 mm at final follow-up date (mean 46.25 months), respectively. Also in this study, the bone loss amount was noticeably small compared to regular implants reported in previous studies. Conclusions The excellent clinical outcome of ultrawide implants was confirmed. It was determined that an ultrawide implant can be used as an alternative when the bone quality in the posterior teeth is relatively low or when a previous implant has failed.
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Affiliation(s)
- Jeong-Kui Ku
- Department of Oral and Maxillofacial Surgery, Section of Dentistry, Seoul National University Bundang Hospital, Gumi-ro 173-82, Bundang-gu, Seongnam City, Gyeonggi-do 13620 South Korea
| | - Yang-Jin Yi
- Department of Prosthodontics, Section of Dentistry, Seoul National University Bundang Hospital, Gumi-ro 173-82, Bundang-gu, Seongnam City, Gyeonggi-do 13620 South Korea ; Department of Dentistry and Dental Research Institute, School of Dentistry, Seoul National University, Daehak-ro 101, Jongno-gu, Seoul 03080 South Korea
| | - Pil-Young Yun
- Department of Oral and Maxillofacial Surgery, Section of Dentistry, Seoul National University Bundang Hospital, Gumi-ro 173-82, Bundang-gu, Seongnam City, Gyeonggi-do 13620 South Korea
| | - Young-Kyun Kim
- Department of Oral and Maxillofacial Surgery, Section of Dentistry, Seoul National University Bundang Hospital, Gumi-ro 173-82, Bundang-gu, Seongnam City, Gyeonggi-do 13620 South Korea ; Department of Dentistry and Dental Research Institute, School of Dentistry, Seoul National University, Daehak-ro 101, Jongno-gu, Seoul 03080 South Korea
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de Oliveira GJPL, Barros-Filho LAB, Barros LAB, Queiroz TP, Marcantonio E. In Vitro Evaluation of the Primary Stability of Short and Conventional Implants. J ORAL IMPLANTOL 2016; 42:458-463. [PMID: 27455447 DOI: 10.1563/aaid-joi-d-16-00094] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The objective of this study was to evaluate the primary stability of short and conventional dental implants with different platform types at different site densities in vitro. One hundred twenty implants were placed in polyurethane blocks that simulate different bone densities (bone types I and IV). The implants were divided into 10 groups, with 12 implants each according to the type of prosthetic connections (external hexagon, EH; morse taper, MT) and size of the implants (conventional: 4 × 10 mm; short: 5 × 5, 5.5 × 5, 5 × 6, and 5.5 × 6 mm). Insertion torque and resonance frequency analyses were performed to evaluate the primary stability. The Kruskal-Wallis test complemented by Dunn's test and the Mann-Whitney test were used for statistical analysis. These tests were applied at the confidence level of 95% (P < .05). The implants installed in blocks with density type IV exhibited reduced insertion torque compared with implants placed in blocks with density type I. Short implants with EH exhibited increased insertion torque compared with short implants with MT in blocks with bone density type I. In general, implants installed in blocks with density type I exhibited greater primary stability. The short implants with EH with a 5.5-mm diameter and the short implants with MT with a 5-mm diameter exhibited reduced primary stability. No differences between short and conventional implants were noted. Short implants have primary stability and insertion torque at least equivalent to conventional implants irrespective of the platform type and density of the site.
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Affiliation(s)
| | - Luiz Antônio Borelli Barros-Filho
- 1 Section of Periodontology, Department of Diagnosis and Surgery, School of Dentistry at Araraquara-Universidade Estadual Paulista, Araraquara, SP, Brazil
| | - Luiz Antônio Borelli Barros
- 2 Section of Clinics, Department of Oral Social Health, School of Dentistry at Araraquara- Universidade Estadual Paulista, Araraquara, SP, Brazil
| | - Thalita Pereira Queiroz
- 3 Department of Health Sciences, Dental School, University Center of Araraquara-Araraquara, São Paulo, Brazil
| | - Elcio Marcantonio
- 1 Section of Periodontology, Department of Diagnosis and Surgery, School of Dentistry at Araraquara-Universidade Estadual Paulista, Araraquara, SP, Brazil
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The Use of Narrow Diameter Implants in the Molar Area. Int J Dent 2016; 2016:8253090. [PMID: 27293436 PMCID: PMC4879234 DOI: 10.1155/2016/8253090] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2016] [Revised: 04/06/2016] [Accepted: 04/06/2016] [Indexed: 02/08/2023] Open
Abstract
Implant rehabilitations in the posterior jaw are influenced by many factors such as the condition of the remaining teeth, the force factors related to the patient, the quality of the bone, the maintenance of the hygiene, the limited bone height, the type and extent of edentulism, and the nature of the opposing arch. The gold standard is to place a regular diameter implant (>3.7 mm) or a wide one to replace every missing molar. Unfortunately, due to horizontal bone resorption, this option is not possible without lateral bone augmentation. In this situation, narrow diameter implant (NDI < 3.5 mm) could be the alternative to lateral bone augmentation procedures. This paper presents a clinical study where NDIs were used for the replacement of missing molars. They were followed up to 11 years. Special considerations were observed and many parameters were evaluated. NDI could be used to replace missing molar in case of moderate horizontal bone resorption if strict guidelines are respected. Yet, future controlled prospective clinical trials are required to admit their use as scientific evidence.
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Lozano-Carrascal N, Salomó-Coll O, Gilabert-Cerdà M, Farré-Pagés N, Gargallo-Albiol J, Hernández-Alfaro F. Effect of implant macro-design on primary stability: A prospective clinical study. Med Oral Patol Oral Cir Bucal 2016; 21:e214-21. [PMID: 26827067 PMCID: PMC4788802 DOI: 10.4317/medoral.21024] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2015] [Accepted: 11/24/2015] [Indexed: 11/05/2022] Open
Abstract
BACKGROUND Implant restorations have become a high predictable treatment option. Several caracteristics such as surgical technique and implant design can influence the treatment outcomes. The aim of the present study was to evaluate the influence of implant macro-design on primary stability measured with resonance frequency analysis (RFA) and insertion torque (IT). Material and Mehods: A total of 47 implants divided in two groups: Test group (TI): 22 Tapered MIS® Seven implants; Control group (CI): 25 cylindrical Astra® Osseospeed implants. All implants were inserted following the manufacturers' standard protocols. Implant primary stability was measured at the moment of implant placement by registering insertion torque values (ITv) and ISQ values by means of Osstell™ Mentor (ISQv) (Integration Diagnostic Ltd., Goteborg, Sweden). RESULTS In the mandible, mean ISQv for tapered implants (TI) was 71.67±5.16 and for cylindrical implants (CI) 57.15±4.83 (p=0.01). Mean insertion torque was 46.67±6.85 Ncm for TI and 35.77±6.72 Ncm for CI (p=0.01). In the maxilla, mean ISQ was 67.2±4.42 for tapered implants and 49.17±15.30 for cylindrical implants (p=0.01). Mean insertion torque for TI was 41.5±6.26 Ncm and for CI 39.17±6.34 Ncm (p>0.05). For tapered implants, no correlation could be found between implant diameter and primary stability. But for cylindrical implants there was a statistically significant correlation between implant diameter and primary stability: ITv (p=0.03); ISQv (p=0.04). CONCLUSIONS Within the limits of the present study, tapered shaped implants achieve higher primary stability measured through ISQ and insertion torque values. Moreover, for cylindrical implants positive correlation has been established between implant diameter and primary stability.
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Affiliation(s)
- Naroa Lozano-Carrascal
- Universitat Internacional de Catalunya, c/ Josep Trueta s/n, 08195 Sant Cugat del Vallès, Barcelona, Spain,
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Short dental implants versus standard dental implants placed in the posterior jaws: A systematic review and meta-analysis. J Dent 2016; 47:8-17. [PMID: 26804969 DOI: 10.1016/j.jdent.2016.01.005] [Citation(s) in RCA: 156] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2015] [Revised: 01/08/2016] [Accepted: 01/09/2016] [Indexed: 11/20/2022] Open
Abstract
OBJECTIVE The purpose of the present systematic review and meta-analysis was to compare short implants (equal or less than 8mm) versus standard implants (larger than 8mm) placed in posterior regions of maxilla and mandible, evaluating survival rates of implants, marginal bone loss, complications and prosthesis failures. DATA This review has been registered at PROSPERO under the number CRD42015016588. Main search terms were used in combination: dental implant, short implant, short dental implants, short dental implants posterior, short dental implants maxilla, and short dental implants mandible. SOURCE An electronic search for data published up until September/2015 was undertaken using the PubMed/Medline, Embase and The Cochrane Library databases. STUDY SELECTION Eligibility criteria included clinical human studies, randomized controlled trials and/or prospective studies, which evaluated short implants in comparison to standard implants in the same study. CONCLUSION The search identified 1460 references, after inclusion criteria 13 studies were assessed for eligibility. A total of 1269 patients, who had received a total of 2631 dental implants. The results showed that there was no significant difference of implants survival (P=.24; RR:1.35; CI: 0.82-2.22), marginal bone loss (P=.06; MD: -0.20; CI: -0.41 to 0.00), complications (P=.08; RR:0.54; CI: 0.27-1.09) and prosthesis failures (P=.92; RR:0.96; CI: 0.44-2.09). Short implants are considered a predictable treatment for posterior jaws. However, short implants with length less than 8 mm (4-7 mm) should be used with caution because they present greater risks to failures compared to standard implants. CLINICAL SIGNIFICANCE Short implants are frequently placed in the posterior area in order to avoid complementary surgical procedures. However, clinicians need to be aware that short implants with length less than 8mm present greater risk of failures.
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Ting M, Palermo M, Donatelli DP, Gaughan JP, Suzuki JB, Jefferies SR. A meta-analysis on the effect of implant characteristics on the survival of the wide-diameter implant. Int J Implant Dent 2015; 1:28. [PMID: 27747650 PMCID: PMC5005654 DOI: 10.1186/s40729-015-0030-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2015] [Accepted: 10/13/2015] [Indexed: 11/26/2022] Open
Abstract
The purposes of the study are to study the implant survival of the wide-diameter implant and to analyze if the length, the implant surface, or the placement location has any effect on its survival. Electronic databases were searched from inception to Dec 2014. Studies included in the review had implants placed in areas of adequate bone width and had clear inclusion and exclusion criteria for patient selection. Immediately placed and immediately loaded implants were excluded. A meta-analysis was done using the “random effects” model on the included studies. And, a meta-regression was used to evaluate the effects of location, length, and surface on the implant survival. Of the six studies selected, three evaluated surface-treated implants and three machined implants. The overall pooled survival rate of the wide implant is 96.3 %. The meta-regression showed that when using a wide implant, neither its surface nor its length nor its position in the maxilla or mandible adversely affected its survival (P > 0.05). This meta-analysis concluded that the location, length, and surface of the wide-diameter implant did not affect its survival and therefore suggested that when the conditions of the implant site corresponded to the inclusion criteria of our meta-analysis, choosing a wide-diameter implant in the posterior mandible or maxilla, where implant length may be limited by the nerve or the sinus, the use of a short implant regardless of its surface would not affect its survival.
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Affiliation(s)
- Miriam Ting
- Kornberg School of Dentistry, Temple University, 3223 North Broad Street, Philadelphia, PA, 19140, USA
| | - Matthew Palermo
- Kornberg School of Dentistry, Temple University, 3223 North Broad Street, Philadelphia, PA, 19140, USA.
| | - David P Donatelli
- Kornberg School of Dentistry, Temple University, 3223 North Broad Street, Philadelphia, PA, 19140, USA
| | - John P Gaughan
- School of Medicine, Temple University, 3420 N Broad St, Philadelphia, PA, 19140, USA
| | - Jon B Suzuki
- Kornberg School of Dentistry, Temple University, 3223 North Broad Street, Philadelphia, PA, 19140, USA
| | - Steven R Jefferies
- Kornberg School of Dentistry, Temple University, 3223 North Broad Street, Philadelphia, PA, 19140, USA
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