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Amalorpavam V, Chandramohan G, Soundar J, Shankar K, Missier MS, Hines AJ. Stereomicroscope-Based in Vitro Study Evaluating the Marginal and Internal Fit of PEEK and PEKK Crowns. JOURNAL OF PHARMACY AND BIOALLIED SCIENCES 2024; 16:S1404-S1408. [PMID: 38882827 PMCID: PMC11174236 DOI: 10.4103/jpbs.jpbs_756_23] [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: 08/27/2023] [Revised: 08/27/2023] [Accepted: 10/03/2023] [Indexed: 06/18/2024] Open
Abstract
Purpose The aim of the in vitro study was to compare the internal merge and marginal perfection of polyetheretherketone (PEEK) and polyetherketoneketone (PEKK) crowns under a stereomicroscope. Methods All-ceramic preparation is done on the maxillary first premolar which is mounted on the wax block which was scanned using 3Shape scanner and duplicated into 30 acrylic CAD/CAM dies (n = 15) for the placement of PEEK and PEKK crowns. The YENADENT milling system was used to fabricate 15 samples from Group A PEEK crowns and to fabricate 15 samples from Group B PEKK crowns. According to the manufacturer's instructions, an equal amount of the dual-cure resin luting agent (Rely X U200 Self-Adhesive resin, 3M, Germany) was dispensed on the mixing pad before being mixed with cement and painted on the internal surfaces of the copings with the finger pressure crowns which were luted. The values were then analyzed using one-way ANOVA (post hoc) followed by Dunnett's t-test. Results Among those two groups, PEEK group materials showed the lowest mean value of (28.73.3 ± 4.01) for marginal fit and (26.72 ± 2.53) for internal gap, whereas PEKK group showed a mean value of (32.85 ± 4.63) and (33.06 ± 4.14), respectively. Conclusion Among these two groups, comparatively less marginal fit and internal adaptation is seen in PEKK when compared to the PEEK crowns. While the marginal fit and internal adaptation of both PEEK and PEKK copings were in acceptable clinical range.
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Affiliation(s)
- V Amalorpavam
- Assistant Professor, Department of Prosthodontics, Rajas Dental College and Hospital, Kavalkinaru, Tirunelveli, Tamil Nadu, India
| | - Giri Chandramohan
- Head of the Department and Professor, Department of Prosthodontics, Sree Mookambika Institute of Dental Sciences, Kulsekaram, Kanyakumari, India
| | - Joephin Soundar
- Assistant Professor, Department of Prosthodontics, Rajas Dental College and Hospital, Kavalkinaru, Tirunelveli, Tamil Nadu, India
| | - Kamala Shankar
- Associate Professor, Department of Prosthodontics, Chettinad Dental College, Chennai, India
| | - Mary Sheloni Missier
- Assistant Professor, Department of Orthodontics, Rajas Dental College and Hospital, Kavalkinaru, Tirunelveli, Tamil Nadu, India
| | - Allen Jim Hines
- Associate Professor, Department of Prosthodontics, Sree Mookambika Institute of Dental Sciences, Kavalkinaru, Tirunelveli, Tamil Nadu, India
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Shenoy A, Maiti S, Nallaswamy D, Keskar V. An in vitro comparison of the marginal fit of provisional crowns using the virtual tooth preparation workflow against the traditional technique. J Indian Prosthodont Soc 2023; 23:391-397. [PMID: 37861617 DOI: 10.4103/jips.jips_273_23] [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] [Indexed: 10/21/2023] Open
Abstract
Aim This study investigates the effectiveness of an innovative virtual tooth preparation workflow for the fabrication of dental crowns using cone-beam computed tomography (CBCT) and intraoral scanners (IOSs) with conventional workflow using extraoral/laboratory scanners. Settings and Design This in vitro experimental study was conducted in the laboratory of a university in Chennai, India. The dental laboratory and research facilities at the institution were utilized for the fabrication of the temporary crowns and the data acquisition process. Materials and Methods Institutional approval was obtained from the university. It was basically a comparison between the virtual prep technique using CBCT and IOS and the conventional digital technique using extra oral scanners (EOS) for temporary crown fabrication. The sample size was estimated using an effect size of 1.5004, assuming a normal distribution, a significance level of 0.05, and a power of 0.95 in G power software. Based on this calculation, an extracted second lower molar was used to fabricate 10 samples in each group. The samples were divided into three groups: the CBCT (Group 1), the IOS (Group 2), and laboratory scanner (Group 3 as control) groups. The vertical marginal gap of all the surfaces of the crown was evaluated using a scanning electron microscope. Statistical Analysis Used Data were analyzed using one-way ANOVA using the SPSS software version 26.0, IBM, Armonk, NY, USA. Results Acceptable marginal discrepancy values were obtained in all three groups. There was no significant difference in the marginal discrepancy recorded (P = 0.113). Conclusion Virtual tooth preparation using CBCT and IOSs can be used as an alternative to the conventional workflow for provisional crown and bridge fabrication.
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Affiliation(s)
- Amrutha Shenoy
- Department of Prosthodontics and Implantology, Saveetha Dental College and Hospitals, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai, Tamil Nadu, India
| | - Subhabrata Maiti
- Department of Prosthodontics and Implantology, Saveetha Dental College and Hospitals, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai, Tamil Nadu, India
| | - Deepak Nallaswamy
- Department of Prosthodontics and Implantology, Saveetha Dental College and Hospitals, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai, Tamil Nadu, India
| | - Varun Keskar
- Department of Prosthodontics and Implantology, Saveetha Dental College and Hospitals, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai, Tamil Nadu, India
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Chouksey P, Yadav NS, Hazari P, Saxena V, Mahajan H, Narwani S, Somkuwar K, Alzahrani AH, Alqahtani SM, Robaian A, Alamoudi A, Zidane B, Albar N, Baeshen HA, Patil S. In Vitro Evaluation of marginal adaptation of polyether ether ketone and zirconia copings. Niger J Clin Pract 2023; 26:701-708. [PMID: 37470642 DOI: 10.4103/njcp.njcp_701_22] [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: 07/21/2023]
Abstract
Background Polyether ether ketone (PEEK) has emerged as a new thermoplastic material with potential applications as a restorative material. Aim: This study aimed to evaluate the marginal adaptation of PEEK copings compared to zirconia copings using field emission scanning electron microscopy. Materials and Methods A freshly extracted maxillary central incisor was prepared for a full-coverage restoration following standard principles of tooth preparation. The tooth was sent to a laboratory for fabrication of samples using computer-aided design and manufacturing (CAD/CAM). Twenty samples of polyether ether ketone (PEEK) copings (group A) and 20 of zirconia copings were fabricated (group B). The copings were scanned under a field emission scanning electron microscope and measurements were taken at four distinct points. The marginal adaptation over the buccal, lingual, mesial, and distal margins for both groups was evaluated. One-way analysis of variance (ANOVA) and independent t test were applied. Results Our findings indicate that PEEK showed better marginal adaptation than zirconia at all measurement points. The mean marginal gap value of the PEEK group was 33.99 ± 8.81 μm and of the zirconia group was 56.21 ± 15.07 μm. On comparing marginal adaptation among the mesial, distal, buccal, and lingual aspects, PEEK showed better adaptation on all four margins, with the best adaptation on the buccal margin that had the lowest mean gap value of 29.27 ± 6.07 μm. The zirconia group adapted best at the distal margin, with a lowest mean gap value of 53.58 ± 15.25 μm (P ≤ 0.05). Conclusion PEEK copings had better marginal adaptation and fit compared to zirconia copings. It may have applications as a restorative material in fixed prostheses.
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Affiliation(s)
- P Chouksey
- Peoples Dental Academy, Bhopal, Madhya Pradesh, India
| | - N S Yadav
- Department of Prosthodontics Crown and Bridge and Implantology, Peoples Dental Academy, Peoples University, Bhopal, Madhya Pradesh, India
| | - P Hazari
- Department of Prosthodontics Crown and Bridge and Implantology, Peoples Dental Academy, Peoples University, Bhopal, Madhya Pradesh, India
| | - V Saxena
- Department of Public Health Dentistry, Government Dental College, Indore, Madhya Pradesh, India
| | - H Mahajan
- Department of Prosthodontics Crown and Bridge and Implantology, Peoples Dental Academy, Peoples University, Bhopal, Madhya Pradesh, India
| | - S Narwani
- Department of Prosthodontics Crown and Bridge and Implantology, Peoples Dental Academy, Peoples University, Bhopal, Madhya Pradesh, India
| | - K Somkuwar
- Department of Prosthodontics Crown and Bridge and Implantology, Peoples Dental Academy, Peoples University, Bhopal, Madhya Pradesh, India
| | - A H Alzahrani
- Department of Prosthodontics, Faculty of Dentistry, Taif University, Taif- 90813, Saudi Arabia
| | - S M Alqahtani
- Department of Prosthetic Dentistry, College of Dentistry, King Khalid University, Abha 62529, Saudi Arabia
| | - A Robaian
- Conservative Dental Sciences Department, College of Dentistry, Prince Sattam bin Abdulaziz University, Alkharj- 11942, Saudi Arabia
| | - Ahmed Alamoudi
- Oral Biology Department, King Abdulaziz University, Jeddah- 22252, Saudi Arabia
| | - B Zidane
- Restorative Dentistry Department, King Abdulaziz University, Jeddah- 22252, Saudi Arabia
| | - N Albar
- Restorative Dentistry Department, Faculty of Dentistry Jazan University, Jazan- 45412, Saudi Arabia
| | - H A Baeshen
- Department of Orthodontics, Faculty of Dentistry, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - S Patil
- College of Dental Medicine, Roseman University of Health Sciences, South Jordan, UTAH-84095, USA; Centre of Molecular Medicine and Diagnostics (COMManD), Department of Biochemistry, Saveetha Dental College and Hospitals, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai, India
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Ferrini F, Paolone G, Di Domenico GL, Pagani N, Gherlone EF. SEM Evaluation of the Marginal Accuracy of Zirconia, Lithium Disilicate, and Composite Single Crowns Created by CAD/CAM Method: Comparative Analysis of Different Materials. MATERIALS (BASEL, SWITZERLAND) 2023; 16:2413. [PMID: 36984293 PMCID: PMC10058296 DOI: 10.3390/ma16062413] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 03/12/2023] [Accepted: 03/15/2023] [Indexed: 06/18/2023]
Abstract
(1) Background: The objective of this in vitro study is to evaluate the marginal accuracy of crowns created by CAD/CAM. (2) Methods: A customized chrome-cobalt (Cr-Co) implant abutment simulating a maxillary right first molar was fixed in a hemi-maxillary stone model and scanned. In total, 27 crowns were fabricated, including 9 lithium disilicate crowns, 9 composite crowns, and 9 zirconia crowns. The measurements were determined by scanning electron microscopy. Descriptive analysis was performed using the mean and standard deviation, while the Kruskal-Wallis test was performed to determine whether the marginal discrepancies were significantly different between each group (p < 0.05). (3) Results: The lowest marginal gap value was reported for zirconia (21.45 ± 12.58 µm), followed by composite (44.7 ± 24.96 µm) and lithium disilicate (62.28 ± 51.8 µm). The Kruskal-Wallis tests revealed a statistically significant difference (p-value < 0.05) in the mean marginal gaps between different materials. (4) Conclusions: The proposed digital workflow can be a viable alternative for fixed prosthetic rehabilitations. The best performance in terms of marginal gap was achieved by zirconia crowns, but all three materials demonstrate marginal closure below the clinically accepted threshold value (120 µm). Clinical significance: although significant differences were reported, the investigated CAD/CAM materials showed clinically acceptable marginal gaps.
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Affiliation(s)
- Francesco Ferrini
- Dental School, IRCCS San Raffaele Hospital, Vita-Salute San Raffaele University, 20132 Milan, Italy
| | - Gaetano Paolone
- Dental School, IRCCS San Raffaele Hospital, Vita-Salute San Raffaele University, 20132 Milan, Italy
| | | | - Nicolò Pagani
- Dental School, IRCCS San Raffaele Hospital, Vita-Salute San Raffaele University, 20132 Milan, Italy
| | - Enrico Felice Gherlone
- Dental School, IRCCS San Raffaele Hospital, Vita-Salute San Raffaele University, 20132 Milan, Italy
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Kalantari MH, Abbasi B, Giti R, Rastegar Z, Tavanafar S, Shahsavari-pour S. Clinical evaluation of marginal fit of uncemented CAD-CAM monolithic zirconia three-unit restorations in anterior areas, using scannable and conventional polyvinyl siloxane impression materials. BMC Oral Health 2023; 23:52. [PMID: 36717822 PMCID: PMC9885647 DOI: 10.1186/s12903-023-02771-z] [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: 05/27/2022] [Accepted: 01/27/2023] [Indexed: 01/31/2023] Open
Abstract
BACKGROUND The accuracy of impression techniques determines the marginal fit of fixed prostheses. Marginal accuracy plays a main role in the success and failure of treatments. This in-vivo study evaluated the marginal fit of anterior three-unit monolithic zirconia fixed partial dentures (FPDs) using conventional and scannable polyvinyl siloxane impression materials. METHODS Ten patients were selected to replace the lateral teeth with a three-unit monolithic zirconia bridge. For each patient, in the first group, an impression was made with a two-step putty-wash technique using scannable polyvinyl siloxane material (BONASCAN; DMP, Greece). In the identical session, as the second group, an impression of conventional putty-wash polyvinyl siloxane was taken (BONASIL A+ Putty; DMP, Greece). The marginal discrepancy was measured through the replicas, which were cut perpendicularly within the buccolingual and mesiodistal directions. An Independent t-test was employed for data analyses (P < 0.05). RESULTS The marginal discrepancy in a conventional method for central abutment in mid-buccal, mid-lingual, mid-mesial, and mid-distal was higher than in the scannable method but it was not significant (P > 0.05). Also, the marginal discrepancy for canine abutment in the conventional method was higher than in the scannable method, but it was not significant, either (P > 0.05). CONCLUSIONS FPDs fabricated from both scannable and conventional impression materials were not superior to each other in marginal fit for both central and canine abutments by evaluation using the replica technique.
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Affiliation(s)
- Mohammad Hassan Kalantari
- grid.412571.40000 0000 8819 4698Department of Prosthodontics, School of Dentistry, Shiraz University of Medical Science, Shiraz, Iran
| | - Benika Abbasi
- Department of Prosthodontics, School of Dentistry, Isfahan University of Medical Science, Isfahan, Iran.
| | - Rashin Giti
- grid.412571.40000 0000 8819 4698Department of Prosthodontics, School of Dentistry, Shiraz University of Medical Science, Shiraz, Iran
| | - Zahra Rastegar
- grid.412571.40000 0000 8819 4698Department of Periodontology, School of Dentistry, Shiraz University of Medical Science, Shiraz, Iran
| | - Saeid Tavanafar
- grid.411701.20000 0004 0417 4622Department of Oral and Maxillofacial Surgery, School of Dentistry, Birjand University of Medical Sciences, Birjand, Iran
| | - Sheila Shahsavari-pour
- grid.412571.40000 0000 8819 4698Department of Oral and Maxillofacial Surgery, School of Dentistry, Shiraz University of Medical Science, Shiraz, Iran
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Muacevic A, Adler JR, Paliwal J, Meena KK, Madaan R, Gurjar B. An In Vitro Comparison of Zirconia and Hybrid Ceramic Crowns With Heavy Chamfer and Shoulder Finish Lines. Cureus 2023; 15:e33940. [PMID: 36819334 PMCID: PMC9937780 DOI: 10.7759/cureus.33940] [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] [Accepted: 01/18/2023] [Indexed: 01/20/2023] Open
Abstract
Purpose This in vitro study aimed to compare the marginal fit and internal adaptation of computer-aided designed and computer-aided manufactured (CAD-CAM) zirconia and hybrid ceramic crowns on heavy chamfer and shoulder finish line designs using silicon replica method. Materials and methods Forty die samples were divided into four groups of 10 dies each. Out of 40 diecasts scanned, zirconia crowns were milled on 20 casts (10 prepared with shoulder and 10 prepared with heavy chamfer finish line design), while hybrid ceramic crowns were milled on the rest of the 20 casts. After milling crowns, the silicone replica technique measured the marginal fit and internal adaptation. Results The heavy chamfer finish line design provided a better marginal fit than the shoulder finish line design for zirconia and hybrid ceramic crowns. Hybrid ceramic crowns had a better marginal fit and internal adaptation than zirconia crowns, both at heavy chamfer and shoulder finish line design. The gap at the margin was less than the axial and occlusal walls, and the maximum gap was observed in the occlusal area. In addition, the marginal gap was less than the internal gap, which showed a positive correlation with each other. Conclusion The study concluded that the difference in CAD-CAM materials and finish line designs influences marginal fit and crown restoration's internal adaptation. A heavy chamfer finish line design provides a better marginal fit for zirconia and hybrid ceramic crowns than a shoulder finish line design. Hybrid ceramic crowns have a better marginal fit and internal adaptation than zirconia crowns in heavy chamfer and shoulder finish lines.
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Effect of cementation and aging on the marginal fit of veneered and monolithic zirconia and metal-ceramic CAD-CAM crowns. J Prosthet Dent 2020; 125:323.e1-323.e7. [PMID: 33176924 DOI: 10.1016/j.prosdent.2020.06.036] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Revised: 06/21/2020] [Accepted: 06/22/2020] [Indexed: 10/23/2022]
Abstract
STATEMENT OF PROBLEM Marginal fit of zirconia restorations is an important criterion for their long-term success. However, in spite of the wide use of zirconia in dentistry, the relationship between marginal fit and low-temperature degradation from aging is unclear. PURPOSE The purpose of this in vitro study was to compare the marginal adaptation of veneered and monolithic zirconia and metal-ceramic computer-aided design and computer-aided manufacturing (CAD-CAM) crowns before and after cementation and to evaluate the influence of artificial aging on the adaptation of zirconia crowns. MATERIAL AND METHODS Seventy-two standardized dies were prepared to receive a posterior crown and randomly divided into 6 groups (n=12) as per the material and the presence or not of cement: metal-ceramic, veneered zirconia, and monolithic zirconia. The zirconia groups were subjected to accelerated low-temperature degradation through hydrothermal aging in an autoclave at 131 °C and 0.17 MPa for 5 and 20 hours. A scanning electron microscope with a magnification of ×1000 was used for marginal adaptation measurements, and X-ray diffraction (XRD) was used to characterize phase transformation degradation. The data were statistically analyzed using 2-way ANOVA, repeated measures ANOVA with Greenhouse-Geisser correction, and the t test (α=.05). RESULTS No significant differences in the marginal discrepancy were recorded among the analyzed groups. The presence of cement did not influence marginal fit in any treatment group. No significant differences were observed in the marginal adaptation values before and after aging (P>.05). After 20 hours of aging, the monoclinic phase increase to 8.3% on veneered zirconia and to 3.1% on monolithic crowns. CONCLUSIONS Monolithic and bilayer CAD-CAM zirconia crowns showed marginal gaps that were within an acceptable range of clinical discrepancy, regardless of cementation. Marginal adaptation was not influenced by aging. Low-temperature degradation did not lead to a significant transformation from the tetragonal to monoclinic phase.
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Ferrairo BM, Piras FF, Lima FF, Honório HM, Duarte MAH, Borges AFS, Rubo JH. Comparison of marginal adaptation and internal fit of monolithic lithium disilicate crowns produced by 4 different CAD/CAM systems. Clin Oral Investig 2020; 25:2029-2036. [PMID: 32783095 DOI: 10.1007/s00784-020-03511-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Accepted: 08/06/2020] [Indexed: 12/01/2022]
Abstract
OBJECTIVES To evaluate the marginal adaptation and internal space of crowns produced by 4 CAD/CAM systems using microcomputed tomography (μCT) and replica technique (RT). MATERIALS AND METHODS Monolithic lithium disilicate crowns were milled (Ceramill, Cerec, EDG, and Zirkonzahn) (n = 10). The cement film obtained with low viscosity silicone was scanned by the μCT system and captured by a stereomicroscope, according to RT. Two-way ANOVA followed by Tukey's test were used for statistical analysis (α = 0.05). A uniformity index (UI) was idealized to describe the distribution of crowns' internal space and submitted to the Kruskal-Wallis and Tukey's test (α = 0.05). The correlation between μCT and RT was performed by Pearson's Correlation Coeficient (α = 0.05). RESULTS Marginal adaptation and internal space were statistically significant different between the experimental groups for the μCT and RT (p < 0.05). The medians of the 4 systems tested were within clinically acceptable range and the mean (± SD) highest marginal discrepancy was recorded in the Ceramill group at 133.0 ± 71.5 μm (μCT) and 90.6 ± 38.5 μm (RT). For internal fit, the UI disclosed a better distribution of the internal space for the Zirkonzahn group (p < 0.001). There was a strong correlation between the methods (p = 0.01 and r = 0.69). CLINICAL RELEVANCE Because of the variability of the CAD/CAM systems available, evaluating their accuracy is of clinical interest. The 4 systems are capable to produce restorations adaptated within clinically appropriate levels. The μCT and RT are efficient adaptation methodologies.
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Affiliation(s)
- Brunna Mota Ferrairo
- Department of Prosthodontics and Periodontics, Bauru School of Dentistry, University of São Paulo, Alameda Doutor Octávio Pinheiro Brisolla, 9-75, Bauru, SP, 17012-901, Brazil.
| | - Fernanda Furtado Piras
- Department of Prosthodontics and Periodontology, Faculty of Dentistry, University of Marília (UNIMAR), Avenida Higino Muzi Filho, 1001, Marília, SP, 17525-902, Brazil
| | - Feranda Ferruzzi Lima
- Department of Dentistry, Maringá State University, Maringá, PR, Brazil.,Department of Restorative Dentistry and Prosthodontics, Ingá University Center - UNINGÁ, School of Dentistry, Maringá, PR, Brazil
| | - Heitor Marques Honório
- Department of Pediatric Dentistry, Orthodontics and Public Health, Bauru School of Dentistry, University of São Paulo, Alameda Doutor Octávio Pinheiro Brisolla, 9-75, Bauru, SP, 17012-901, Brazil
| | - Marco Antonio Hungaro Duarte
- Department of Operative Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, University of São Paulo, Alameda Doutor Octávio Pinheiro Brisolla, 9-75, Bauru, SP, 17012-901, Brazil
| | - Ana Flávia Sanches Borges
- Department of Operative Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, University of São Paulo, Alameda Doutor Octávio Pinheiro Brisolla, 9-75, Bauru, SP, 17012-901, Brazil
| | - José Henrique Rubo
- Department of Prosthodontics and Periodontics, Bauru School of Dentistry, University of São Paulo, Alameda Doutor Octávio Pinheiro Brisolla, 9-75, Bauru, SP, 17012-901, Brazil
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Kumar HC, Kumar TP, Hemchand S, Suneelkumar C, Subha A. Accuracy of marginal adaptation of posterior fixed dental prosthesis made from digital impression technique: A systematic review. J Indian Prosthodont Soc 2020; 20:123-130. [PMID: 32655216 PMCID: PMC7335028 DOI: 10.4103/jips.jips_382_19] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2019] [Revised: 12/12/2019] [Accepted: 02/24/2020] [Indexed: 11/04/2022] Open
Abstract
Aim The aim of this systematic review was to investigate the marginal adaptation of three or four unit fixed dental prosthesis (FDP) fabricated with digital impression techniques to those fabricated using any other impression technique. Settings and Design Database/electronic searches were conducted till August 2019 in PUBMED-MEDLINE, SCOPUS, and Cochrane library. To identify published articles, multiple keywords were used to develop a search strategy in various combinations. Manual searching of articles was also done. Clinicaltrials.gov.in WHOICTRP and CTRI websites were also searched. Two independent reviewers (TP and VK) assessed eligibility for inclusion, extracted data, and assessed quality using the Cochrane risk of bias tool. Results Database search identified 497 citations and four citations through manual search. After removing duplicates and going through abstracts, 23 articles were perused for full-text screening. Two articles met the inclusion criteria; characteristics were described qualitatively, with two studies having overall low risk of bias. Conclusions Marginal adaptation of FDPs fabricated using the digital and conventional impressions method was within the clinically acceptable limits. However, more robust clinical trials need to be conducted with large sample size to validate the conclusions.
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Affiliation(s)
- Hanuman Chalapathi Kumar
- Department of Prosthodontics, Narayana Dental College and Hospital, Nellore, Andhra Pradesh, India
| | - Tannamala Pavan Kumar
- Department of Prosthodontics, Narayana Dental College and Hospital, Nellore, Andhra Pradesh, India
| | - Surapaneni Hemchand
- Department of Prosthodontics, Drs Sudha and Nageswara Rao Siddhartha Institute of Dental Sciences, Gannavaram, Andhra Pradesh, India
| | - Chinni Suneelkumar
- Department of Conservative Dentistry and Endodontics, Narayana Dental College and Hospital, Nellore, Andhra Pradesh, India
| | - Anirudhan Subha
- Department of Conservative Dentistry and Endodontics, Sri Ramakrishna Dental College and Hospital, Coimbatore, Tamil Nadu, India
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De Freitas BN, Tonin BSH, Macedo AP, Dos Santos TMP, De Mattos MDGC, Hotta TH, Matsumoto W. Adaptation accuracy of milled lithium disilicate crowns: A 2D and 3D microCT analysis. J ESTHET RESTOR DENT 2020; 32:403-409. [PMID: 32091666 DOI: 10.1111/jerd.12574] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2019] [Revised: 01/22/2020] [Accepted: 02/10/2020] [Indexed: 10/24/2022]
Abstract
OBJECTIVE Evaluate the effects of the scanning techniques and the crystallization in the internal and marginal adaptation of milled lithium disilicate crowns by two techniques computer microtomography analysis. MATERIALS AND METHODS Sixteen polyurethane teeth prepared for a complete crown were divided into two groups according to the scanner method (n = 8): indirect (IND), dental stone models were scanned with laser-surface scanner, and direct (DIR), digital typodont creates with an intraoral scanner. Internal and marginal gap were evaluated by micro-computed tomography (microCT). The replica technique (RT) was applied for analysis of total volume (TV) and marginal volume (MV) gap in microCT. The data showed normal distribution (Shapiro-Wilk test). One-way ANOVA (scanner techniques) with repeated measures (crystallization) was performed. Multiple comparisons were performed with Bonferroni adjustment (α = .05). RESULTS The axial gap showed a significant difference between the times (P = .017) for lower values after crystallization. The vertical marginal gap presented a significant difference in times for higher value after crystallization (P = .001). The marginal horizontal gap IND was greater than DIR after crystallization (P = .001) and IND before lower than after crystallization. For TV was not significant difference and MV in DIR was reduction (P = .002) after crystallization. CONCLUSION Crystallization changes the relationship between the crown and tooth, reducing internal gap and preventing the adequate fit in indirect and direct scanning. CLINICAL SIGNIFICANCE The measure gap under technological methodology is useful for adjust clinical parameters prosthetic in the CAD/CAM and the applicability of the new possibilities of analysis.
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Affiliation(s)
- Bruna N De Freitas
- Department of Dental Materials and Prosthesis, School of Dentistry of Ribeirão Preto, University of São Paulo, São Paulo, Brazil
| | - Bruna S H Tonin
- Department of Dental Materials and Prosthesis, School of Dentistry of Ribeirão Preto, University of São Paulo, São Paulo, Brazil
| | - Ana P Macedo
- Department of Dental Materials and Prosthesis, School of Dentistry of Ribeirão Preto, University of São Paulo, São Paulo, Brazil
| | - Thais M P Dos Santos
- Nuclear Instrumentation Laboratory, COPPE, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Maria D G C De Mattos
- Department of Dental Materials and Prosthesis, School of Dentistry of Ribeirão Preto, University of São Paulo, São Paulo, Brazil
| | - Takami H Hotta
- Department of Dental Materials and Prosthesis, School of Dentistry of Ribeirão Preto, University of São Paulo, São Paulo, Brazil
| | - Wilson Matsumoto
- Department of Dental Materials and Prosthesis, School of Dentistry of Ribeirão Preto, University of São Paulo, São Paulo, Brazil
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11
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Pandurangan KK, Veeraiyan DN, Nesappan T. In vitro evaluation of fracture resistance and cyclic fatigue resistance of computer-aided design-on and hand-layered zirconia crowns following cementation on epoxy dies. J Indian Prosthodont Soc 2020; 20:90-96. [PMID: 32089604 PMCID: PMC7008630 DOI: 10.4103/jips.jips_222_19] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2019] [Revised: 11/08/2019] [Accepted: 11/26/2019] [Indexed: 11/04/2022] Open
Abstract
Aim This in vitro study was to compare the fracture resistance and cyclic fatigue resistance of hand-layered zirconia crowns and computer-aided design (CAD)-on crowns (lithium disilicate with zirconium oxide). Settings and Design Comparative -Invitro study design. Materials and Methods All ceramic crown preparation was done on a mandibular molar ivorine tooth, impression made, and duplicated. Twenty hand-layered zirconia crowns and twenty CAD-on crowns were fabricated using CAD/computer-aided manufacturing (CAD/CAM) technique. All crowns were cemented to their respective dies using resin cement for evaluating fracture resistance and cyclic fatigue resistance using universal testing machine. Statistical Analysis Used Independent samples t-test, Mann-Whitney U-test, and Shapiro-Wilk test were used. Results The mean fracture resistance of CAD-on crowns (2660.50 ± 501.303 N) was significantly more than that of hand-layered zirconia crowns (1963.60 ± 452.895 N) (independent samples t-test, P < 0.023). Cyclic fatigue resistance test results showed that the mean number of cycles before failure for hand-layered zirconia crowns was 175,297 and for CAD-on crowns was 212,097 (Mann-Whitney U-test, P < 0.012). Conclusion CAD-on crowns were found to have significantly higher fracture resistance and cyclic fatigue resistance properties than hand-layered zirconia crowns.
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Affiliation(s)
- Kiran Kumar Pandurangan
- Department of Prosthodontics, Saveetha Dental College and Hospital, Chennai, Tamil Nadu, India
| | | | - Thiyaneswaran Nesappan
- Department of Prosthodontics, Saveetha Dental College and Hospital, Chennai, Tamil Nadu, India
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12
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Ansarifard E, Mohaghegh M, Firouzmandi M, Ramazani L. Marginal fit of full contour monolithic zirconia in different thicknesses and layered zirconia crowns. J Int Soc Prev Community Dent 2020; 10:652-658. [PMID: 33282776 PMCID: PMC7685281 DOI: 10.4103/jispcd.jispcd_25_20] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2020] [Revised: 02/12/2020] [Accepted: 08/14/2020] [Indexed: 11/05/2022] Open
Abstract
Aim: Use of monolithic zirconia for fabrication of all-ceramic crowns eliminates several shortcomings of layered zirconia crowns. Long-term success of restorations highly depends on the marginal fit. The crown thickness is among the factors that affect the marginal integrity. Meanwhile, reduced thickness of crowns has several advantages such as preservation of tooth structure. The aim of this study was to evaluate the marginal fit of monolithic zirconia crowns in reduced thickness and to compare the marginal fit of full-contour monolithic zirconia in different thicknesses with layered zirconia crowns. Materials and Methods: In this in vitro study, two standard brass dies (7 mm × 5 mm length diameter) were prepared with a heavy chamfer finish line with 0.5 and 1 mm depth. By using a CAD-CAM system, 30 crowns were made in three groups (n = 10) of 1-mm thick layered zirconia, 1-mm thick monolithic zirconia, and 0.5-mm thick monolithic zirconia. Crowns were placed on master dies and randomly numbered. The marginal gap was measured on 18 points by using a digital microscope (×230). The mean ± standard deviation (SD) values were calculated and analyzed by Statistical Package for the Social Sciences (SPSS) software program through Kruskal–Wallis and Mann–Whitney tests (α = 0.05). Results: The marginal gap of 1-mm layered zirconia was significantly different from that of 1-mm monolithic zirconia (P = 0.001) and 0.5-mm monolithic zirconia (P = 0.004). Analysis of variance (ANOVA) revealed no significant difference between 0.5 and 1 mm thicknesses of monolithic zirconia (P = 0.141). Conclusion: Marginal gap in all the three groups was clinically acceptable. The two different thicknesses of monolithic zirconia crowns had no significant effect on the restoration marginal fit; however, layered zirconia crowns showed a significantly higher marginal gap than monolithic zirconia crowns.
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13
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Meirowitz A, Bitterman Y, Levy S, Mijiritsky E, Dolev E. An in vitro evaluation of marginal fit zirconia crowns fabricated by a CAD-CAM dental laboratory and a milling center. BMC Oral Health 2019; 19:103. [PMID: 31196041 PMCID: PMC6567516 DOI: 10.1186/s12903-019-0810-9] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2019] [Accepted: 05/31/2019] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Marginal fit is critical for the success and longevity of a dental restoration. Zirconia crowns can be fabricated either chair-side, in a dental laboratory or in a milling center; each can give different marginal fits results. However, discussion of the marginal fit of zirconia crowns when different fabrication methods are compared is lacking in the literature. PURPOSE To compare the marginal discrepancy (MD) and absolute marginal discrepancy (AMD) of computer-aided design, and computer-aided manufacturing (CAD-CAM) used in a dental laboratory and a milling center for producing monolithic zirconia crowns. METHODS The marginal fit of 30 zirconia crowns cemented to typodont teeth was evaluated by means of a sectioning technique. Fifteen crowns were fabricated with a CEREC inLAB MC X5 from IPS e.max ZirCAD blocks. Fifteen crowns were fabricated using a LAVA milling center from LAVA Plus Zirconia Blocks. The 30 crowns were sectioned with a precision saw, and MD and AMD were subsequently measured using a light microscope. Data were analyzed using the one-way ANOVA technique to investigate significant differences in the marginal fit between the two fabrication systems (α = .05). RESULTS The AMD dimension of the CEREC inLAB system was significantly smaller (P < .05). Mean AMD values for zirconia crowns fabricated by the CEREC inLAB were 85 μm, and for the LAVA milling center 133 μm. There was no significant difference between the two systems regarding the MD dimensions. The MD values for zirconia crowns fabricated by the CEREC inLAB were 53 μm and for the LAVA milling center 61 μm. CONCLUSIONS The CEREC inLAB system demonstrated significantly better marginal fit in relation to the AMD. However, no difference between the systems was found in the MD. Monolithic zirconia crowns fabricated by the CAD-CAM CEREC inLAB system and the LAVA system milling center showed MD values of less than 120 μm, which is within the clinically acceptable range.
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Affiliation(s)
- Avi Meirowitz
- Department of Oral Rehabilitation, Goldschleger School of Dental Medicine, The Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Yoli Bitterman
- Department of Orthodontics, Goldschleger School of Dental Medicine, The Sackler Faculty of Medicine, Tel Aviv University, 69978, Tel - Aviv, Israel.
| | - Sharon Levy
- Department of Oral Rehabilitation, Goldschleger School of Dental Medicine, The Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Eitan Mijiritsky
- Sackler Faculty of Medicine, Department of Otolaryngology Head and Neck and Maxillofacial Surgery, Tel-Aviv Sourasky Medical Center, Tel-Aviv University, Tel Aviv, Israel
| | - Eran Dolev
- Department of Oral Rehabilitation, Goldschleger School of Dental Medicine, The Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
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14
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Tan FB, Wang C, Dai HW, Fan YB, Song JL. Accuracy and reproducibility of 3D digital tooth preparations made by gypsum materials of various colors. J Adv Prosthodont 2018; 10:8-17. [PMID: 29503709 PMCID: PMC5829291 DOI: 10.4047/jap.2018.10.1.8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2017] [Revised: 07/29/2017] [Accepted: 08/29/2017] [Indexed: 11/08/2022] Open
Abstract
PURPOSE The study aimed to identify the accuracy and reproducibility of preparations made by gypsum materials of various colors using quantitative and semi-quantitative three-dimensional (3D) approach. MATERIALS AND METHODS A titanium maxillary first molar preparation was created as reference dataset (REF). Silicone impressions were duplicated from REF and randomized into 6 groups (n=8). Gypsum preparations were formed and grouped according to the color of gypsum materials, and light-scanned to obtain prepared datasets (PRE). Then, in terms of accuracy, PRE were superimposed on REF using the best-fit-algorithm and PRE underwent intragroup pairwise best-fit alignment for assessing reproducibility. Root mean square deviation (RMSD) and degrees of similarity (DS) were computed and analyzed with SPSS 20.0 statistical software (α=.05). RESULTS In terms of accuracy, PREs in 3D directions were increased in the 6 color groups (from 19.38 to 20.88 µm), of which the marginal and internal variations ranged 51.36 - 58.26 µm and 18.33 - 20.04 µm, respectively. On the other hand, RMSD value and DS-scores did not show significant differences among groups. Regarding reproducibility, both RMSD and DS-scores showed statistically significant differences among groups, while RMSD values of the 6 color groups were less than 5 µm, of which blue color group was the smallest (3.27 ± 0.24 µm) and white color group was the largest (4.24 ± 0.36 µm). These results were consistent with the DS data. CONCLUSION The 3D volume of the PREs was predisposed towards an increase during digitalization, which was unaffected by gypsum color. Furthermore, the reproducibility of digitalizing scanning differed negligibly among different gypsum colors, especially in comparison to clinically observed discrepancies.
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Affiliation(s)
- Fa-Bing Tan
- College of Stomatology, Chongqing Medical University, Chongqing, China.,Chongqing Key Laboratory for Oral Diseases and Biomedical Sciences, Chongqing, China
| | - Chao Wang
- College of Stomatology, Chongqing Medical University, Chongqing, China.,Chongqing Key Laboratory for Oral Diseases and Biomedical Sciences, Chongqing, China.,Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, Chongqing, China
| | - Hong-Wei Dai
- College of Stomatology, Chongqing Medical University, Chongqing, China.,Chongqing Key Laboratory for Oral Diseases and Biomedical Sciences, Chongqing, China.,Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, Chongqing, China
| | - Yu-Bo Fan
- Laboratory for Biomechanics and Mechanobiology of Ministry of Education, School of Biological Science and Medical Engineering, Beihang University, Beijing, China
| | - Jin-Lin Song
- College of Stomatology, Chongqing Medical University, Chongqing, China.,Chongqing Key Laboratory for Oral Diseases and Biomedical Sciences, Chongqing, China.,Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, Chongqing, China
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Malaguti G, Rossi R, Marziali B, Esposito A, Bruno G, Dariol C, DI Fiore A. In vitro evaluation of prosthodontic impression on natural dentition: a comparison between traditional and digital techniques. ORAL & IMPLANTOLOGY 2017; 9:21-27. [PMID: 28280529 DOI: 10.11138/orl/2016.9.1s.021] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
OBJECTIVES The aim of this in vitro study is to evaluate the marginal and internal fit of zirconia core crowns manufactured following different digital and traditional workflows. METHODS A 6° taper shoulder prepared abutment tooth was used to produce 20 zirconia core crowns using four different scanning techniques: scanned directly with the extraoral lab scanner, scanned with intraoral scanner, dental impressions using individual dental tray and polyether, dental casts from a polyether impressions. Marginal and internal fits were evaluated with digital photography and the silicone replica method. RESULTS Medium marginal gaps were 76,00 μm ± 28.9 for extraoral lab scanner, 80.50 μm ± 36,2 for intraoral scanner, 88.10 μm ± 34,8 for dental impression scan and 112,4 μm ± 37,2 for dental cast scan. Medium internal gaps were 23.20 μm ± 10,3 for extraoral lab scanner, 16.20 μm ± 8.3 for intraoral scanner, 27.20 μm ± 16.7 for dental impression scan and 30.20 μm ± 12.7 for dental cast scan. CONCLUSION Internal gap were extensively lower than 70 μm described in literature. Marginal fit was higher than ideal values for all the techniques but within the limit of clinical success. Intraoral scanners obtained the best results for internal gap.
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Affiliation(s)
- G Malaguti
- DDS, Private practice, Bagnolo in Piano (RE), Italy
| | - R Rossi
- ODT, Private practice, Reggio Emilia, Italy
| | - B Marziali
- ODT, Private practice, Reggio Emilia, Italy
| | | | - G Bruno
- Student, Department of Neuroscience, School of Dentistry, University of Padua, Padua, Italy
| | - C Dariol
- DDS, Department of Neuroscience, School of Dentistry, University of Padua, Padua, Italy
| | - A DI Fiore
- DDS, Department of Neuroscience, School of Dentistry, University of Padua, Padua, Italy
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