LIVIVO - The Search Portal for Life Sciences

zur deutschen Oberfläche wechseln
Advanced search

Search results

Result 1 - 10 of total 81

Search options

  1. Article ; Online: Fit analysis of stereolithography-manufactured three-unit resin prosthesis with different 3D-printing build orientations and layer thicknesses.

    Jang, Gaejun / Kim, Seong-Kyun / Heo, Seong-Joo / Koak, Jai-Young

    The Journal of prosthetic dentistry

    2023  Volume 131, Issue 2, Page(s) 301–312

    Abstract: Statement of problem: Printing conditions can affect the fit of a 3-dimensionally (3D) printed prosthesis. Therefore, it is important to determine the optimal printing conditions for stereolithography (SLA)-manufactured prostheses.: Purpose: The ... ...

    Abstract Statement of problem: Printing conditions can affect the fit of a 3-dimensionally (3D) printed prosthesis. Therefore, it is important to determine the optimal printing conditions for stereolithography (SLA)-manufactured prostheses.
    Purpose: The purpose of this study was to analyze the fit according to the build orientations and layer thicknesses in SLA-manufactured 3-unit resin prostheses.
    Material and methods: SLA 3D printed prostheses were produced in 5 build orientations (0, 30, 45, 60, and 90 degrees) and 2 layer thicknesses (50 and 100 μm). Milled prostheses were fabricated from the same design. The mounted prostheses on the master model were scanned with microcomputed tomography (μCT). Data were processed with the NRecon software program. For quantitative analysis, marginal and internal fits were measured by using the imageJ software program in terms of the following metrics: absolute marginal discrepancy, marginal gap, cervical area, midaxial wall area, line-angle area, and occlusal area. Internal gap volume was also measured with the CTAn software program. For statistical analysis, ANOVA and Tukey HSD tests were used (α=.05). For qualitative analysis, μCT cross-sections were compared among groups, and intaglio surfaces were imaged with a scanning electron microscope.
    Results: A layer thickness of 50 μm with build orientations of 45 and 60 degrees exhibited smaller mean gap values (P<.05) than the other conditions for all measurements except line-angle area and occlusal area. The scanning electron microscope images showed voids on the intaglio surfaces for the 0- and 90-degree groups.
    Conclusions: For SLA 3D printed resin prostheses, a difference in fit occurred based on the printing conditions, although both 3D printed and milled prostheses showed a clinically acceptable fit. When an SLA 3D printed prosthesis is manufactured under appropriate conditions, a clinically acceptable fit can be obtained.
    MeSH term(s) Stereolithography ; Computer-Aided Design ; X-Ray Microtomography ; Dental Implants ; Printing, Three-Dimensional
    Chemical Substances Dental Implants
    Language English
    Publishing date 2023-01-17
    Publishing country United States
    Document type Journal Article
    ZDB-ID 218157-5
    ISSN 1097-6841 ; 0022-3913
    ISSN (online) 1097-6841
    ISSN 0022-3913
    DOI 10.1016/j.prosdent.2021.11.031
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  2. Article: A retrospective comparison of clinical outcomes of implant restorations for posterior edentulous area: 3-unit bridge supported by 2 implants vs 3 splinted implant-supported crowns.

    Yi, Yuseung / Heo, Seong-Joo / Koak, Jai-Young / Kim, Seong-Kyun

    The journal of advanced prosthodontics

    2022  Volume 14, Issue 4, Page(s) 223–235

    Abstract: Purpose: To compare the clinical outcomes of two types of implant restoration for posterior edentulous area, 3-unit bridge supported by 2 implants and 3 implant-supported splinted crowns.: Materials and methods: The data included 127 implant- ... ...

    Abstract Purpose: To compare the clinical outcomes of two types of implant restoration for posterior edentulous area, 3-unit bridge supported by 2 implants and 3 implant-supported splinted crowns.
    Materials and methods: The data included 127 implant-supported fixed restorations in 85 patients: 37 restorations of 3-unit bridge supported by 2 implants (2-IB), 37 restorations of 3 implant-supported splinted crowns (3-IC), and 53 single restorations (S) as controls. Peri-implantitis and mechanical complications that occurred for 14 years were analyzed by multivariable Cox regression model. Kaplan-Meier curves and the multivariable Cox regression model were used to analyze the success and survival of implants.
    Results: Peri-implantitis occurred in 28.4% of 2-IB group, 37.8% of 3-IC group, and 28.3% of S control group with no significant difference. According to the implant position, middle implants (P2) of the 3-IC group had the highest risk of peri-implantitis. The 3-IC group showed a lower mechanical complication rate (7.2%) than the 2-IB (16.2%) and S control group (20.8%). The cumulative success rate was 52.8% in S (control) group, 62.2% in 2-IB group, and 60.4% in 3-IC group. The cumulative survival rate was 98.1% in S (control) group, 98.6% in 2-IB group, and 95.5% in 3-IC group. There was no significant difference in the success and survival rate according to the restoration type.
    Conclusion: The restoration type was not associated with the success and survival of implants. The risk of mechanical complications was reduced in 3 implant-supported splinted crowns. However, the middle implants of the 3 implant-supported splinted crowns had a higher risk of peri-implantitis.
    Language English
    Publishing date 2022-08-29
    Publishing country Korea (South)
    Document type Journal Article
    ZDB-ID 2575831-7
    ISSN 2005-7814 ; 2005-7806
    ISSN (online) 2005-7814
    ISSN 2005-7806
    DOI 10.4047/jap.2022.14.4.223
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  3. Article: Clinical and radiographic evaluations of implants as surveyed crowns for Class I removable partial dentures: A retrospective study.

    Yoo, Soo-Yeon / Kim, Seong-Kyun / Heo, Seong-Joo / Koak, Jai-Young

    The journal of advanced prosthodontics

    2022  Volume 14, Issue 2, Page(s) 108–121

    Abstract: Purpose: The purpose of this study was to evaluate survival rates and marginal bone loss (MBL) of implants in IC-RPDs.: Materials and methods: Seventy implants were placed and used as surveyed crowns in 30 RPDs. The survival rates and MBL around ... ...

    Abstract Purpose: The purpose of this study was to evaluate survival rates and marginal bone loss (MBL) of implants in IC-RPDs.
    Materials and methods: Seventy implants were placed and used as surveyed crowns in 30 RPDs. The survival rates and MBL around implants based on multiple variables, e.g., position, sex, age, opposing dentitions, splinting, type of used retainer, and first year bone loss, were analyzed. Patient reported outcome measures (PROMs) regarding functional/esthetic improvement after IC-RPD treatment, and complications were also inspected.
    Results: The 100% implant survival rates were observed, and 60 of those implants showed MBL levels less than 1.5 mm. No significant differences in MBL of implants were observed between implant positions (maxilla vs. mandible;
    Conclusion: Class I RPD connected to residual teeth and strategically positioned implants as surveyed crowns can be a viable treatment modality.
    Language English
    Publishing date 2022-04-27
    Publishing country Korea (South)
    Document type Journal Article
    ZDB-ID 2575831-7
    ISSN 2005-7814 ; 2005-7806
    ISSN (online) 2005-7814
    ISSN 2005-7806
    DOI 10.4047/jap.2022.14.2.108
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  4. Article ; Online: Clinical Outcomes of Implant-Assisted Removable Partial Dentures According to Implant Strategic Position.

    Yi, Yuseung / Heo, Seong-Joo / Koak, Jai-Young / Kim, Seong-Kyun

    Journal of prosthodontics : official journal of the American College of Prosthodontists

    2022  Volume 32, Issue 5, Page(s) 401–410

    Abstract: Purpose: To retrospectively analyze the success of implant-assisted removable partial dentures (IARPDs) according to three types of strategic positions in distal extension areas of Kennedy Class I and II arches.: Materials and methods: The data ... ...

    Abstract Purpose: To retrospectively analyze the success of implant-assisted removable partial dentures (IARPDs) according to three types of strategic positions in distal extension areas of Kennedy Class I and II arches.
    Materials and methods: The data included 102 arches in 95 patients with Kennedy Class I/II arches treated with IARPDs with implants in three strategic positions: Type 1a, assisted by P-1a implants on the anterior area adjacent to the abutment tooth; Type 1b, assisted by P-1b implants on the anterior area apart from the abutment tooth with or without P-1a; Type 2, assisted by P-2a implants on the posterior area adjacent to the natural tooth or P-2b implants on the posterior area apart from the abutment tooth to modify from Kennedy Class I /II to Class III. The success was defined as the IARPDs without abutment tooth-related, denture-related, and implant-related complications. Kaplan-Meier curves and the multivariable Cox regression model were used to analyze the success of IARPDs and implants.
    Results: The overall success rate of IARPD treatment was 66.7%; 77.8% in Type 1a, 60.0% in Type 1b, and 68.0% in Type 2. There was no significant effect of treatment type on success rate of IARPDs. However, there was significant differences at the level of implant supporting IARPDs: 83.3% in Type 1a implants, 62.6% in Type 1b implants, and 73.2% in Type 2 implants. The implants of IARPD's adjacent to the natural tooth abutments (P-1a and P-2a) had higher success rates than those away from the natural tooth abutments.
    Conclusions: Within the limitations of this study, there was no significant difference in the prosthodontic complications of IARPDs depending on the treatment type. However, the success of implants of IARPD is associated with the strategic position. Strategic implant abutments adjacent to the natural tooth had higher success rates than those away from the natural teeth abutments.
    MeSH term(s) Humans ; Dental Implants ; Retrospective Studies ; Denture, Partial, Removable ; Dental Abutments ; Dental Prosthesis, Implant-Supported
    Chemical Substances Dental Implants
    Language English
    Publishing date 2022-10-13
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1197213-0
    ISSN 1532-849X ; 1059-941X
    ISSN (online) 1532-849X
    ISSN 1059-941X
    DOI 10.1111/jopr.13609
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  5. Article ; Online: Comparative analysis of flexural strength of 3D printed and milled 4Y-TZP and 3Y-TZP zirconia.

    Kyung, Kyu-Young / Park, Ji-Man / Heo, Seong-Joo / Koak, Jai-Young / Kim, Seong-Kyun / Ahn, Jin-Soo / Yi, Yuseung

    The Journal of prosthetic dentistry

    2024  Volume 131, Issue 3, Page(s) 529.e1–529.e9

    Abstract: Statement of problem: The mechanical properties of 3 dimensionally (3D) printed zirconia have been reported to be comparable with those of milled zirconia, except for the flexural strength. However, most previous studies tested 3 mol% yttria-stabilized ... ...

    Abstract Statement of problem: The mechanical properties of 3 dimensionally (3D) printed zirconia have been reported to be comparable with those of milled zirconia, except for the flexural strength. However, most previous studies tested 3 mol% yttria-stabilized tetragonal zirconia polycrystal (3Y-TZP), making it necessary to study 3D printed zirconia with 4 mol% yttria content (4Y-TZP).
    Purpose: The purpose of this in vitro study was to compare the flexural strength of 3D printed 4Y-TZP with 3Y-TZP materials and milled 4Y-TZP.
    Material and methods: A total of 80 disk specimens (Ø15×1.5 mm) were fabricated and divided into 4 groups (n=20) using the fabrication method and yttria content: milled 3Y-TZP (Katana HT; Kuraray Noritake), 3D printed 3Y-TZP (TZ-3Y-E; Tosoh), milled 4Y-TZP (Katana STML; Kuraray Noritake), and 3D printed 4Y-TZP (3DMAT; Genoss). The biaxial flexural strength was determined with a piston-on-3-ball test (n=15). The flexural strength of each specimen was measured, and the Weibull modulus (m) and characteristic strength (σ
    Results: The flexural strength of 3D printed 4Y-TZP was significantly higher than that of milled 4Y-TZP (P<.001). In contrast, the flexural strength of 3D printed 3Y-TZP was significantly lower than that of milled 3Y-TZP (P<.001). X-ray diffraction (XRD) analysis revealed that the tetragonal phase was the dominant phase in all groups, with the identification of some cubic phase peaks.
    Conclusions: Three dimensionally printed 4Y-TZP showed significantly higher flexural strength than milled 4Y-TZP and exhibited a clinically acceptable flexural strength exceeding 800 MPa.
    MeSH term(s) Flexural Strength ; Microscopy, Electron, Scanning ; Printing, Three-Dimensional ; Yttrium ; Zirconium
    Chemical Substances yttria (X8071685XT) ; zirconium oxide (S38N85C5G0) ; Yttrium (58784XQC3Y) ; Zirconium (C6V6S92N3C)
    Language English
    Publishing date 2024-01-11
    Publishing country United States
    Document type Journal Article
    ZDB-ID 218157-5
    ISSN 1097-6841 ; 0022-3913
    ISSN (online) 1097-6841
    ISSN 0022-3913
    DOI 10.1016/j.prosdent.2023.12.020
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  6. Article ; Online: Could Fixed Implants Be a Viable Treatment Option in Disabled Patients? A Clinical Retrospective Study.

    Yoo, Soo-Yeon / Kim, Seong-Kyun / Heo, Seong-Joo / Koak, Jai-Young / Seo, Kwang-Suk

    The International journal of oral & maxillofacial implants

    2023  Volume 38, Issue 3, Page(s) 562–568

    Abstract: Purpose: To verify the survival rates and marginal bone loss (MBL) of implants in patients with different disability types.: Materials and methods: Clinical and radiographic assessments were performed in a total of 189 implants for fixed implant ... ...

    Abstract Purpose: To verify the survival rates and marginal bone loss (MBL) of implants in patients with different disability types.
    Materials and methods: Clinical and radiographic assessments were performed in a total of 189 implants for fixed implant prostheses in 72 patients. Data were collected on loaded implants at least 1 year in function, and the mean observation time was 37.3 months. Implant survival was examined, and MBL was observed around the implants of two groups (mental disability vs physical disability) based on age, sex, implant location (anterior vs posterior), and prosthetic connection (internal vs external).
    Results: Of the 189 implants, 4 failed; the total implant survival rate was 97.8% across a mean of 37.3 months. The cumulative survival rate at 85 months in a Kaplan-Meier survival curve analysis was 94.3% ± 3% in patients with mental disability and 50% ± 35.4% in patients with physical disability, which was a statistically significant difference between the disability groups (
    Conclusion: The implant survival rates in patients with disability were in line with those reported for nondisabled patients. The MBL of the implants was within the physiologic bone loss after implant loading. Implants in patients with mental disability showed higher cumulative survival rates than in patients with physical disability, but also a higher amount of MBL. Within the limitations of this study, dental implants for patients with disability are viable. These results can establish future implant treatment plans for this population. Int J Oral Maxillofac Implants 2023;38:562-568. doi: 10.11607/jomi.9880.
    MeSH term(s) Humans ; Disabled Persons ; Dental Implants ; Alveolar Bone Loss/diagnostic imaging ; Survival Rate ; Persons with Mental Disabilities ; Republic of Korea ; Prosthesis Failure ; Male ; Female ; Adult
    Chemical Substances Dental Implants
    Language English
    Publishing date 2023-06-06
    Publishing country United States
    Document type Journal Article
    ZDB-ID 632880-5
    ISSN 1942-4434 ; 0882-2786
    ISSN (online) 1942-4434
    ISSN 0882-2786
    DOI 10.11607/jomi.9880
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  7. Article ; Online: Splinting or Nonsplinting Adjacent Implants? A Retrospective Study Up to 15 Years: Part I-Biologic and Mechanical Complication Analysis.

    Yi, Yuseung / Heo, Seong-Joo / Koak, Jai-Young / Kim, Seong-Kyun / Koo, Ki-Tae

    The International journal of oral & maxillofacial implants

    2023  Volume 38, Issue 3, Page(s) 435–442a

    Abstract: Purpose: To analyze the biologic and mechanical complications of splinted and nonsplinted implant restorations.: Materials and methods: A total of 423 patients (n = implants: 888) were included in the study. Biologic and mechanical complications that ...

    Abstract Purpose: To analyze the biologic and mechanical complications of splinted and nonsplinted implant restorations.
    Materials and methods: A total of 423 patients (n = implants: 888) were included in the study. Biologic and mechanical complications that occurred for 15 years were analyzed using the multivariable Cox regression model, and the significant effect of the splinting of prostheses and other risk factors were evaluated.
    Results: Biologic complications occurred in 38.7% of implants: 26.4% of nonsplinted implants (NS) and 45.4% of splinted implants (SP). Mechanical complications occurred in 49.2% of implants: 59.3% NS and 43.9% SP. Implants splinted with both mesial and distal adjacent implants (SP-mid) had the highest risk of peri-implant diseases. As the number of implants splinted increased, the risk of mechanical complications decreased. Long crown lengths increased the risk of both biologic and mechanical complications.
    Conclusion: Splinted implants had a higher risk of biologic complications and lower risk of mechanical complications. The implant splinted to both adjacent implants (SP-mid) had the highest risk of biologic complications. The greater the number of implants splinted, the lower the risk of mechanical complications. Long crown lengths increased the risk of both biologic and mechanical complications. Int J Oral Maxillofac Implants 2023;38:435-442. doi: 10.11607/jomi.10053.
    MeSH term(s) Humans ; Dental Implants/adverse effects ; Retrospective Studies ; Dental Prosthesis, Implant-Supported/adverse effects ; Splints ; Biological Products
    Chemical Substances Dental Implants ; Biological Products
    Language English
    Publishing date 2023-06-06
    Publishing country United States
    Document type Journal Article
    ZDB-ID 632880-5
    ISSN 1942-4434 ; 0882-2786
    ISSN (online) 1942-4434
    ISSN 0882-2786
    DOI 10.11607/jomi.10053
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  8. Article ; Online: Splinting or Nonsplinting Adjacent Implants? A Retrospective Study Up to 15 Years: Part II-Success and Survival Rate Analysis.

    Yi, Yuseung / Heo, Seong-Joo / Koak, Jai-Young / Kim, Seong-Kyun / Koo, Ki-Tae

    The International journal of oral & maxillofacial implants

    2023  Volume 38, Issue 3, Page(s) 443–450b

    Abstract: Purpose: To analyze the success and survival of splinted and nonsplinted implants.: Materials and methods: A total of 423 patients (n = implants: 888) were included in the study. The success and survival of implants for 15 years were analyzed using a ...

    Abstract Purpose: To analyze the success and survival of splinted and nonsplinted implants.
    Materials and methods: A total of 423 patients (n = implants: 888) were included in the study. The success and survival of implants for 15 years were analyzed using a multivariable Cox regression model, and the significant effect of the splinting of prostheses and other risk factors were evaluated.
    Results: The cumulative success rate was 34.2%: 33.2% in nonsplinted (NS) and 34.8% in splinted implants (SP). The cumulative survival rate was 92.9% (94.1%, NS; 92.3%, SP). Whether to splint was not related to the success and survival of implants. The smaller the implant diameter, the lower the survival rate. The crown length and implant length were significantly associated only with NS implants: The longer the crown length and the shorter the implant length, the greater the risk of implant failure. The emergence angle (EA) and the emergence profile (EP) had a significant effect on only the SP implants: EA3 showed a higher risk than EA1, and EP2 and EP3 had a higher risk of implant failure.
    Conclusion: Crown length and implant length affected only the nonsplinted implants: The higher the crown length and the shorter the implant length, the greater the risk of implant failure. A significant effect for emergence contour was found only in SP implants: the implants restored with prostheses with EA ≥ 30 degrees on both the mesial and distal sides, and convex EP on at least one side had higher risks of failure. Int J Oral Maxillofac Implants 2023;38:443-450. doi: 10.11607/jomi.10054.
    MeSH term(s) Humans ; Dental Implants/adverse effects ; Retrospective Studies ; Survival Rate ; Dental Prosthesis Design/adverse effects ; Dental Prosthesis, Implant-Supported
    Chemical Substances Dental Implants
    Language English
    Publishing date 2023-06-06
    Publishing country United States
    Document type Journal Article
    ZDB-ID 632880-5
    ISSN 1942-4434 ; 0882-2786
    ISSN (online) 1942-4434
    ISSN 0882-2786
    DOI 10.11607/jomi.10054
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  9. Article ; Online: Mechanical complications of implant-supported restorations with internal conical connection implants: A 14-year retrospective study.

    Yi, Yuseung / Heo, Seong-Joo / Koak, Jai-Young / Kim, Seong-Kyun

    The Journal of prosthetic dentistry

    2021  Volume 129, Issue 5, Page(s) 732–740

    Abstract: Statement of problem: Internal conical connections have become the primary choice for implant-supported restorations. However, studies that identified the risk indicators for mechanical complications and diagnosed the prognosis of the implant-supported ... ...

    Abstract Statement of problem: Internal conical connections have become the primary choice for implant-supported restorations. However, studies that identified the risk indicators for mechanical complications and diagnosed the prognosis of the implant-supported restorations are lacking.
    Purpose: The purpose of this retrospective clinical study was to evaluate the incidence and consequences of mechanical complications in components of internal conical connection implants and to analyze the risk indicators.
    Material and methods: A total of 428 patients with 898 internal conical connection implants were included in the study, and mechanical complications over the 14-year observation period were evaluated. The Cox proportional hazard regression model was used to analyze significant effects on mechanical complications, which were presented as hazard ratio and 95% confidence interval.
    Results: Mechanical complications occurred in 430 (47.9%) implants and 248 (57.9%) patients: screw loosening (46.4% of implants, 56.8% of patients); screw fracture (2.6% of implants, 4.4% of patients); abutment fracture (11.4% of implants, 21.3% of patients); and implant fracture (3.5% of implants, 5.4% of patients). Implant restorations replacing molars showed the highest risk for mechanical complication (hazard ratio 12.82; 95% confidence interval 2.73-60.31) and for fracture of all components. Men had a higher risk of mechanical complication than women (hazard ratio 2.00; 95% confidence interval 1.55-2.59), and the risk of fracture was higher in all components. With increased splinted implants, the risk of mechanical complication (hazard ratio 0.67; 95% confidence interval 0.49-0.93) and component fracture (hazard ratio 0.73; 95% confidence interval 0.29-0.89) decreased. Gold screws had a lower risk of screw loosening (hazard ratio 0.74; 95% confidence interval 0.58-0.94) than titanium screws, but a higher risk of fracture (hazard ratio 3.45; 95% confidence interval 1.42-8.36). The smaller the implant diameter, the higher the risk of implant fracture (hazard ratio 0.01; 95% confidence interval 0.00-0.05).
    Conclusions: Abutments were most frequently fractured among the components of internal conical connection type implants. Molar implant-supported restorations and male patients had higher risks of mechanical complications, and as the number of splinted implants in a prosthesis increased, the risk decreased. Gold screws showed less risk of screw loosening and higher risk of fracture than titanium screws. Narrow-diameter implants had a higher risk of fracture.
    MeSH term(s) Humans ; Male ; Female ; Dental Implants/adverse effects ; Retrospective Studies ; Titanium ; Dental Prosthesis, Implant-Supported/adverse effects ; Dental Abutments ; Dental Restoration Failure ; Gold ; Dental Implant-Abutment Design/adverse effects
    Chemical Substances Dental Implants ; Titanium (D1JT611TNE) ; Gold (7440-57-5)
    Language English
    Publishing date 2021-09-01
    Publishing country United States
    Document type Journal Article
    ZDB-ID 218157-5
    ISSN 1097-6841 ; 0022-3913
    ISSN (online) 1097-6841
    ISSN 0022-3913
    DOI 10.1016/j.prosdent.2021.06.053
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  10. Article: Investigation of the marginal fit of a 3D-printed three-unit resin prosthesis with different build orientations and layer thicknesses.

    Yang, Min-Seong / Kim, Seong-Kyun / Heo, Seong-Joo / Koak, Jai-Young / Park, Ji-Man

    The journal of advanced prosthodontics

    2022  Volume 14, Issue 4, Page(s) 250–261

    Abstract: Purpose: The purpose of this study was to analyze the marginal fit of three-unit resin prostheses printed with the stereolithography (SLA) method in two build orientations (45°, 60°) and two layer thicknesses (50 µm, 100 µm).: Materials and methods: ... ...

    Abstract Purpose: The purpose of this study was to analyze the marginal fit of three-unit resin prostheses printed with the stereolithography (SLA) method in two build orientations (45°, 60°) and two layer thicknesses (50 µm, 100 µm).
    Materials and methods: A master model for a three-unit resin prosthesis was designed with two implant abutments. Forty specimens were printed using an SLA 3D printer. The specimens were printed with two build orientations (45°, 60°), and each orientation was printed with two layer thicknesses (50 µm, 100 µm). The marginal fit was measured as the marginal gap (MG) and absolute marginal discrepancy (AMD), and MG and AMD measurements were performed at 8 points per abutment, for 16 points per specimen. All statistical analyses were performed using SPSS software. Two-way analysis of variance (ANOVA) was separately performed on the MG and AMD values of the build orientations and layer thicknesses. Moreover, one-way ANOVA was performed for each point within each group.
    Results: The margins of the area adjacent to the pontic showed significantly high values, and the values were smaller when the build orientation was 45° than when it was 60°. However, the margin did not differ significantly according to the layer thicknesses.
    Conclusion: The marginal fit of the three-unit resin prosthesis fabricated by the SLA 3D method was affected by the pontic. Moreover, the marginal fit was affected by the build orientation. The 45° build orientation is recommended.
    Language English
    Publishing date 2022-08-29
    Publishing country Korea (South)
    Document type Journal Article
    ZDB-ID 2575831-7
    ISSN 2005-7814 ; 2005-7806
    ISSN (online) 2005-7814
    ISSN 2005-7806
    DOI 10.4047/jap.2022.14.4.250
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

To top