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Jurado CA, Mekled S, Abuhammoud S, Azpiazu-Flores FX, Vegh D, Wang T, Morton D. Fracture resistance of partial and complete coverage veneers and ceramic crowns for maxillary central incisors. J Prosthet Dent 2024:S0022-3913(24)00296-8. [PMID: 38729791 DOI: 10.1016/j.prosdent.2024.04.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2024] [Revised: 04/18/2024] [Accepted: 04/20/2024] [Indexed: 05/12/2024]
Abstract
STATEMENT OF PROBLEM Minimally invasive treatments have gained popularity in recent years. However, research comparing the fracture resistance of lithium disilicate partial coverage veneer restorations with that of ceramic crowns is lacking. PURPOSE The purpose of this in vitro study was to evaluate and compare the fracture resistance of lithium disilicate restorations fabricated for preparations of various designs. The designs included veneer preparations with finish lines in the upper, middle, and lower third of the facial surface and ceramic crown preparations with margins in the lower third of the facial surface. All restorations were designed and fabricated using a chairside digital workflow. MATERIAL AND METHODS Four maxillary right central incisor typodont teeth were prepared for partial coverage veneer preparation with the margin in the upper middle third of the facial surface (PU1/3); partial coverage veneer preparation with margin in lower middle third of the facial surface (PL1/3); complete coverage veneer preparation (CV) with margin in the cervical region; and ceramic crown (CC) preparation. Each preparation was scanned, and 15 casts were 3D printed from each scan. A total of 60 lithium disilicate restorations were fabricated (n=15 per group) using a chairside computer-aided design and computer-aided manufacturing (CAD-CAM) system (Primescan and MCXL). The different restorations were cemented to the 3D printed testing dies with a photopolymerizable resin cement. The specimens were artificially aged with 10 000 thermal cycles between 5 and 55 °C with a dwell time of 30 seconds and were loaded to failure using a universal testing machine. The maximum load to fracture was analyzed using a 1-way ANOVA and post hoc Tukey honestly significant difference (HSD) test (α=.05). Additionally, the fracture patterns of the specimens were evaluated with a stereomicroscope for descriptive purposes. RESULTS The mean fracture resistance of the chairside CAD-CAM lithium disilicate veneers and ceramic crowns was statistically different depending on the design of the restoration (P<.05). Group CC demonstrated the highest fracture resistance values (1440.66 N), followed by CV (929.8 N) and PU1/3 (756.13 N). The lowest value was for PL1/3 (532.4 N). CONCLUSIONS The fracture resistance measured for the maxillary central incisor partial coverage veneers with margins in the middle third of the facial surface appear capable of resisting average occlusal forces. However, these veneers demonstrated lower fracture resistance values when compared with complete coverage veneers. Further, lithium disilicate crowns demonstrated higher fracture resistance than veneers, irrespective of their design.
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Affiliation(s)
- Carlos A Jurado
- Associate Professor and Director, Operative Dentistry Division, The University of Tennessee Health Science Center, Memphis, Tenn
| | - Salwa Mekled
- Clinical Associate Professor, Restorative Dentistry Department, Temple University Kornberg School of Dentistry, Philadelphia, Pa
| | - Salahaldeen Abuhammoud
- Associate Professor, Department of Prosthodontics, The University of Iowa College of Dentistry and Dental Clinics, Iowa City, Iowa
| | | | - Daniel Vegh
- Assistant Professor, Department of Prosthodontics, Faculty of Dentistry, Semmelweis University, Budapest, Hungary
| | - Ting Wang
- Prosthodontic Resident, Department of Prosthodontics, Indiana University School of Dentistry, Indianapolis, Ind
| | - Dean Morton
- Professor, Department of Prosthodontics, Indiana University School of Dentistry, Indianapolis, Ind; and Director, Center for Implant, Esthetic and Innovative Dentistry, Indiana University School of Dentistry, Indianapolis, Ind
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Alshabib A, Jurado CA, Azpiazu-Flores FX, Aldosary K, Tsujimoto A, Algamaiah H. Mechanical properties and degree of conversion of resin-based core build-up materials and short fiber-reinforced flowable resin-based composite. Dent Mater J 2024:2023-207. [PMID: 38692907 DOI: 10.4012/dmj.2023-207] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/03/2024]
Abstract
To evaluate the degree of conversion (DC), surface hardness (SH), and flexural strength (FS) of resin-based core build-up materials. Core build-up materials used were: MultiCore Flow (MCF); Activa (ACT); Core-X Flow (CXF); and everX flow (EVX), and DC, SH and FS were measured. An increase of DC was identified for all materials post-cure, except for EVX. The DC change percentage ranged from 5%-33%, and EVX was displayed the greatest DC rate. All materials displayed an SH increase after 30 days and the greatest increase was observed in ACT. At 1 h, the SH of EVX and CXF was different from the other materials. At 30 days, MCF displayed the greatest SH. All materials displayed an increase in their FS after 30 days except for EVX, and ranging 3%-36% were noticed. Differences observed between materials, thus clinician should be acquainted mechanical properties of these materials to ensure the success of the restorations.
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Affiliation(s)
| | - Carlos A Jurado
- Division of Operative Dentistry, Department of General Dentistry, The University of Tennessee Health Science Center College of Dentistry
| | - Francisco X Azpiazu-Flores
- Department of Restorative Dentistry, Dr. Gerald Niznick College of Dentistry, University of Manitoba
- Center for Implant, Esthetic, and Innovative Dentistry, Department of Prosthodontics, Indiana University School of Dentistry
| | - Khalid Aldosary
- Dental Department, King Abdulaziz University Hospital, King Saud University
| | - Akimasa Tsujimoto
- Department of Operative Dentistry, Aichi Gakuin University School of Dentistry
- Department of Operative Dentistry, University of Iowa College of Dentistry
- Department of General Dentistry, Creighton University School of Dentistry
| | - Hamad Algamaiah
- Department of Restorative Dentistry, King Saudi University College of Dentistry
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Azpiazu-Flores FX, Morton D, Lin WS. Accelerated denture base festooning using a free 3D modeling computer program: A dental technique. J Prosthet Dent 2024; 131:981-982. [PMID: 38052696 DOI: 10.1016/j.prosdent.2023.11.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Revised: 11/07/2023] [Accepted: 11/08/2023] [Indexed: 12/07/2023]
Affiliation(s)
- Francisco X Azpiazu-Flores
- ITI Scholar, Center for Implant, Esthetic and Innovative Dentistry, Department of Prosthodontics, Indiana University School of Dentistry, Indianapolis, Ind.
| | - Dean Morton
- Professor and Co-Director, Center for Implant, Esthetic and Innovative Dentistry, Indiana University School of Dentistry, Indianapolis, Ind
| | - Wei-Shao Lin
- Professor and Chair, Department of Prosthodontics, Indiana University School of Dentistry, Indianapolis, Ind
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Azpiazu-Flores FX, Yang CC, Lin WS, Polido WD, Morton D. The 3D-printed shell complete denture technique: Simplifying prosthodontic diagnosis prior to implant planning. J Prosthodont 2024. [PMID: 38600720 DOI: 10.1111/jopr.13855] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Accepted: 03/15/2024] [Indexed: 04/12/2024] Open
Abstract
Traditionally, artificial teeth arrangements or the definitive complete dentures are used to establish important prosthodontic parameters such as the occlusal plane orientation, vertical dimension, and the incisal edge position. The relationship of these elements with the underlying bony structures is commonly evaluated using advanced planning protocols such as the dual scan technique. This technique article presents an uncomplicated alternative approach to establish these parameters intraorally using a 3D-printed shell complete denture generated from a 3D scan of the patient's existing complete denture.
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Affiliation(s)
- Francisco X Azpiazu-Flores
- Center for Implant, Esthetic and Innovative Dentistry, Department of Prosthodontics, Indiana University School of Dentistry, Indianapolis, Indiana, USA
| | - Chao-Chieh Yang
- Department of Prosthodontics, Indiana University School of Dentistry, Indianapolis, Indiana, USA
| | - Wei-Shao Lin
- Department of Prosthodontics, Indiana University School of Dentistry, Indianapolis, Indiana, USA
| | - Waldemar D Polido
- Center for Implant, Esthetic and Innovative Dentistry, Indiana University School of Dentistry, Indianapolis, Indiana, USA
| | - Dean Morton
- Center for Implant, Esthetic and Innovative Dentistry, Indiana University School of Dentistry, Indianapolis, Indiana, USA
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Azpiazu-Flores FX, Leyva Del Rio D, Schricker SR, Johnston WM, Lee DJ. Effect of three-dimensionally printed surface patterns on the peak tensile load of a plasticized acrylic-resin resilient liner. J Prosthet Dent 2024; 131:735-740. [PMID: 35589449 DOI: 10.1016/j.prosdent.2022.04.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Revised: 04/18/2022] [Accepted: 04/18/2022] [Indexed: 11/21/2022]
Abstract
STATEMENT OF PROBLEM Stereolithographic (SLA) three-dimensional (3D) printing is considered a reliable manufacturing method for immediate complete dentures. However, studies on the implementation of computer-generated surface patterns to promote the union between printed denture base polymers and dental materials with different chemistries such as plasticized acrylic-resin resilient liners are lacking. PURPOSE The purpose of this in vitro study was to assess the effect of 3D printed surface patterns on the peak tensile load of a short-term plasticized acrylic-resin resilient liner. MATERIAL AND METHODS A total of 30 denture base specimens (Denture Base LP; FormLabs) were fabricated with 3 adhesive surface designs by using an SLA 3D printer (Forms2; FormLabs). Twenty specimens were designed with surface patterns in the adhesive areas (grid and spheres); 10 specimens comprised each surface pattern group. The remaining specimens were roughened with 220-grit silicon carbide paper and served as a control. A commonly used short-term resilient liner (CoeSoft; GC-America) was applied to the adhesive surface of all the specimens. Subsequently, the specimens were kept in distilled water at 37 °C for 48 hours. The specimens were tested in a universal testing machine, and the resulting peak tensile load data were analyzed by using a 1-way analysis of variance (ANOVA) and a post hoc Tukey test (α=.05). RESULTS The groups with surface patterns on the adhesive surface displayed higher peak tensile load values than the control group. The mean peak tensile load of the grid group was 6.73 ±0.43 N, and that for the spheres group was 6.58 ±0.33 N. The control group displayed the lowest mean peak tensile load (2.71 ±0.51 N). Statistically significant differences were detected between the mean peak tensile loads of the surface pattern groups and the control group (P<.001) No statistically significant difference was found between the mean peak tensile loads of the grid and spheres groups (P=.893). CONCLUSIONS Incorporating surface patterns on the intaglio surface of denture bases made with Denture Base LP via SLA 3D printing can enhance their union to a plasticized acrylic-resin resilient liner. Surface patterns generated higher peak tensile load values than slightly roughening the surface of a 3D printed denture with a 220-grit silicon carbide paper. No significant differences in the mean peak tensile loads were observed between the 2 types of surface patterns.
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Affiliation(s)
- Francisco X Azpiazu-Flores
- Former Graduate student, Advanced Prosthodontics Program, The Ohio State University, Columbus, Ohio; Assistant Professor, Department of Restorative Dentistry, Dr. Gerald Niznick College of Dentistry, University of Manitoba, Winnipeg, Canada.
| | - Diana Leyva Del Rio
- Assistant Professor, Division of Restorative and Prosthetic Dentistry, College of Dentistry, The Ohio State University, Columbus, Ohio
| | - Scott R Schricker
- Associate Professor, Division of Restorative and Prosthetic Dentistry, College of Dentistry, The Ohio State University, Columbus, Ohio
| | - William M Johnston
- Professor Emeritus, Division of Restorative and Prosthetic Dentistry, College of Dentistry, The Ohio State University, Columbus, Ohio
| | - Damian J Lee
- Associate Professor and Director of the Advanced Prosthodontics Program, Division of Restorative and Prosthetic Dentistry, College of Dentistry, The Ohio State University, Columbus, Ohio
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Azpiazu-Flores FX, Borga Donmez M, Lin WS, Morton D, Yilmaz B. Verifying the seating of a 3D-printed removable die using elastomeric matrices: A dental technique. J Prosthodont 2024. [PMID: 38502812 DOI: 10.1111/jopr.13839] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2024] [Revised: 02/27/2024] [Accepted: 03/01/2024] [Indexed: 03/21/2024] Open
Abstract
Computer-aided design and computer-aided manufacturing systems enable digital designing and 3-dimensional (3D) printing of definitive casts with removable dies. However, the fit of the removable dies should be without interferences for their accurate positioning in the cast. Given that the accuracy of additive manufacturing depends on design- and manufacturing-related factors, verifying the accuracy of the position of 3D-printed removable dies in their cast is essential to fabricate positionally accurate definitive prostheses, which would enable minimal or no laboratory and clinical adjustments. This dental technique article presents a straightforward approach to verify the seating of a 3D-printed removable die by using verification matrices made of a polyvinylsiloxane interocclusal registration material.
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Affiliation(s)
- Francisco X Azpiazu-Flores
- Center for Implant, Esthetic and Innovative Dentistry, Department of Prosthodontics, Indiana University School of Dentistry, Indianapolis, Indiana, USA
| | - Mustafa Borga Donmez
- Department of Reconstructive Dentistry and Gerodontology, University of Bern, Bern, Switzerland
- Department of Prosthodontics, Istinye University Faculty of Dentistry, Istanbul, Turkey
| | - Wei-Shao Lin
- Chair of the Department of Prosthodontics, Indiana University School of Dentistry, Indianapolis, Indiana, USA
| | - Dean Morton
- Center for Implant, Esthetic and Innovative Dentistry, Department of Prosthodontics, Indiana University School of Dentistry, Indianapolis, Indiana, USA
| | - Burak Yilmaz
- Department of Reconstructive Dentistry and Gerodontology, School of Dental Medicine, University of Bern, Bern, Switzerland
- Department of Restorative, Preventive and Pediatric Dentistry, School of Dental Medicine, University of Bern, Bern, Switzerland
- Division of Restorative and Prosthetic Dentistry, The Ohio State University College of Dentistry, Ohio, USA
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Azpiazu-Flores FX, Swain VL. Defining challenging areas of the preparation finish line by using an open-source 3D modeling computer program: A tip to simplify margin identification by the dental laboratory technician. J Prosthet Dent 2024; 131:537-539. [PMID: 37330358 DOI: 10.1016/j.prosdent.2023.05.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Revised: 05/11/2023] [Accepted: 05/12/2023] [Indexed: 06/19/2023]
Affiliation(s)
- Francisco X Azpiazu-Flores
- Assistant Professor, Department of Restorative Dentistry, Dr Gerald Niznick College of Dentistry, University of Manitoba, Winnipeg, Canada.
| | - Vanessa L Swain
- Department Head and Associate Professor, Department of Restorative Dentistry, Dr Gerald Niznick College of Dentistry, University of Manitoba, Winnipeg, Canada
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Azpiazu-Flores FX, Schricker SR, Seghi RR, Johnston WM, Leyva Del Rio D. Adhesive strength of 3 long-term resilient liners to CAD-CAM denture base polymers and heat-polymerized polymethyl methacrylate with thermocycling. J Prosthet Dent 2024; 131:494-499. [PMID: 35437173 DOI: 10.1016/j.prosdent.2022.03.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Revised: 03/03/2022] [Accepted: 03/04/2022] [Indexed: 10/18/2022]
Abstract
STATEMENT OF PROBLEM Computer-aided design and computer-aided manufacturing (CAD-CAM) technologies have become popular for manufacturing complete dentures. However, the adhesive strength of resilient liners to the polymers used to fabricate CAD-CAM complete dentures is unclear. PURPOSE The purpose of this in vitro study was to determine the adhesive strength of 3 long-term resilient liners to CAD-CAM denture base polymers and heat-polymerized PMMA with thermocycling. MATERIAL AND METHODS A total of 90 specimens were fabricated, 30 per group of denture base material (Lucitone 199, Ivo Base CAD, Denture Base LP). For each denture base polymer, 10 specimens were relined with 1 of 3 resilient liners (Permasoft, Mucopren Soft, Molloplast-B). Five specimens of each group were thermocycled, and the other 5 specimens were stored in distilled water. Subsequently, the adhesive strength of the specimens was assessed by tensile testing. The resulting data were analyzed by using a 3-way analysis of variance (ANOVA) (α=.05). RESULTS After thermocycling, the adhesive strengths of all the resilient liners were found to be statistically different from each other for the same denture base polymer (P≤.012). Mucopren Soft displayed a high mean ±standard deviation adhesive strength to Lucitone 199 (1.78 ±0.32 MPa), followed by Molloplast-B (1.27 ±0.21 MPa) and Permasoft (0.66 ±0.06 MPa). For Ivo Base CAD, Molloplast-B exhibited a high mean ±standard deviation adhesive strength (1.70 ±0.36 MPa), followed by Mucopren Soft (1.11 ±0.16 MPa) and Permasoft (0.53 ±0.04 MPa). Molloplast-B displayed high mean ±standard deviation adhesive strength to Denture Base LP (1.37 ±0.08 MPa), followed by Mucopren Soft (0.68 ±0.20 MPa) and Permasoft (0.32 ±0.04 MPa). The adhesive strength of the majority of resilient liners not exposed to thermocycling was statistically different from each other for the same type of denture base polymer (P<.001). The only exception was the difference between the adhesive strength of Molloplast-B and Mucopren Soft to Lucitone 199 with mean ±standard deviation values of 1.42 ±0.18 and 1.66 ±0.40 MPa, respectively, (P=.067). Without thermocycling, the mean ±standard deviation adhesive strength to Lucitone 199 of Permasoft (0.57 ±0.02 MPa) was statistically different from that of Molloplast-B and Mucopren Soft (P<.001). Molloplast-B displayed a high mean ±standard deviation adhesive strength to Ivo Base CAD (1.83 ±0.25 MPa), followed by Mucopren Soft (1.26 ±0.19 MPa) and Permasoft (0.58 ±0.08 MPa). Molloplast-B displayed a high mean ±standard deviation adhesion to Denture Base LP (1.76 ±0.23 MPa), followed by Mucopren Soft (0.88 ±0.14 MPa) and Permasoft (0.25 ±0.06 MPa). Only Molloplast-B was significantly adversely affected by thermocycling (P=.009). CONCLUSIONS Molloplast-B displayed high adhesive strength to both CAD-CAM denture base polymers regardless of the storage conditions. Mucopren Soft displayed high adhesion to Lucitone 199. Permasoft presented moderate adhesion to PMMA-based denture bases and low adhesion to DBLP. Combining Permasoft with Denture Base LP should be considered carefully and limited to short-term use. Thermocycling had a detrimental effect on the adhesive strength of Molloplast-B.
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Affiliation(s)
- Francisco X Azpiazu-Flores
- Former graduate student, Advanced Prosthodontics Program, The Ohio State University, Assistant Professor, Department of Restorative Dentistry, Dr Gerald Niznick College of Dentistry, University of Manitoba, Winnipeg, Canada.
| | - Scott R Schricker
- Associate professor, Division of Restorative and Prosthetic Dentistry, College of Dentistry, The Ohio State University, Columbus, Ohio
| | - Robert R Seghi
- Professor Emeritus, Division of Restorative and Prosthetic Dentistry, College of Dentistry, The Ohio State University, Columbus, Ohio
| | - William M Johnston
- Professor Emeritus, Division of Restorative and Prosthetic Dentistry, College of Dentistry, The Ohio State University, Columbus, Ohio
| | - Diana Leyva Del Rio
- PhD candidate, Oral Biology PhD Program, College of Dentistry, The Ohio State University, Columbus, Ohio
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Jurado CA, Azpiazu-Flores FX, Fu CC, Rojas-Rueda S, Guzman-Perez G, Floriani F. Expediting the Rehabilitation of Severely Resorbed Ridges Using a Combination of CAD-CAM and Analog Techniques: A Case Report. Medicina (Kaunas) 2024; 60:260. [PMID: 38399547 PMCID: PMC10890117 DOI: 10.3390/medicina60020260] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2023] [Revised: 01/29/2024] [Accepted: 01/31/2024] [Indexed: 02/25/2024]
Abstract
With the life expectancy increasing, there is a growing need for prosthetic dental treatments to restore the oral health, function, and quality of life of edentulous patients. Presently, only a few articles are available describing the oral rehabilitation of patients with severely resorbed ridges with milled complete dentures. This clinical case report provides a straightforward protocol consisting of a combination of analog and digital techniques for the rehabilitation of edentulous patients with severely resorbed ridges with milled fixed and removable complete dentures. This technique permits the minimization of the number of appointments, improves patient comfort, allows for the digital archiving of important clinical data, and permits the manufacture of prostheses with improved mechanical properties. These favorable outcomes were achieved by using the patient's existing PMMA complete denture as a custom tray for a final impression with light-bodied Polyvinylsiloxane. Subsequently, the resulting models were digitized, and a digital complete denture was designed and manufactured in an expedited manner using CAD-CAM techniques. Therefore, this case report highlights the potential of CAD/CAM technology to predictably restabilize oral functions and improve patients' quality of life.
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Affiliation(s)
- Carlos A. Jurado
- Department of Prosthodontics, College of Dentistry and Dental Clinics, The University of Iowa, Iowa City, IA 52242, USA
| | - Francisco X. Azpiazu-Flores
- Department of Restorative Dentistry, Gerald Niznick College of Dentistry, University of Manitoba, Winnipeg, MB R3E 3N4, Canada
- Center for Implant, Esthetic, and Innovative Dentistry, Department of Prosthodontics, Indiana University School of Dentistry, Indianapolis, IN 46202, USA
| | - Chin-Chuan Fu
- Department of Restorative Dentistry, University of Alabama at Birmingham School of Dentistry, Birmingham, AL 35233, USA
| | | | - Gerardo Guzman-Perez
- Department of Periodontology, Centro Educative Multidisciplinario en Rehabilitation Oral (CEMRO), Morelia 58880, Mexico
- Department of Periodontology, Quetzalcoatl University, Irapuato 36615, Mexico
| | - Franciele Floriani
- Department of Prosthodontics, College of Dentistry and Dental Clinics, The University of Iowa, Iowa City, IA 52242, USA
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Azpiazu-Flores FX, Mata-Mata SJ, Lee DJ. Detection of mandibular flexure with a dental plaster verification device: A clinical report with video recording. J Prosthet Dent 2023; 130:807-810. [PMID: 35465960 DOI: 10.1016/j.prosdent.2022.01.039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Revised: 01/24/2022] [Accepted: 01/25/2022] [Indexed: 11/18/2022]
Abstract
Mandibular flexure is a phenomenon characterized by a reduction of the arch width caused by the action of various muscular groups involved during mastication. When flexure is pronounced and teeth or dental implants are rigidly splinted, mandibular flexure leads to a biomechanical environment detrimental to the longevity of the restoration. This clinical report presents the use of a dental plaster device as a diagnostic tool to determine the extent of mandibular flexure in an edentulous patient treated with a mandibular fixed complete denture.
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Affiliation(s)
- Francisco X Azpiazu-Flores
- Former Graduate Student, Advanced Prosthodontics Program, The Ohio State University, Columbus, Ohio; Assistant Professor, Department of Restorative Dentistry, Dr Gerald Niznick College of Dentistry, University of Manitoba, Winnipeg, Canada.
| | - Severino J Mata-Mata
- Former Graduate Student, Advanced Prosthodontics Program, The Ohio State University, Columbus, Ohio; Private practice, Ciudad de Guatemala, Guatemala
| | - Damian J Lee
- Assistant Professor and Director of the Advanced Prosthodontics Program, Division of Restorative and Prosthetic Dentistry, College of Dentistry, The Ohio State University, Columbus, Ohio
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Jurado CA, Arndt K, Azpiazu-Flores FX, Faddoul F, França R, Fischer NG, Watanabe H. Evaluation of Glazing and Polishing Systems for Novel Chairside CAD/CAM Lithium Disilicate and Virgilite Crowns. Oper Dent 2023; 48:689-699. [PMID: 37881035 DOI: 10.2341/23-017-l] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/06/2023] [Indexed: 10/27/2023]
Abstract
OBJECTIVE The purpose of this study was to evaluate the effectiveness of glazing, two zirconia, and two lithium disilicate polishing systems on surface roughness of a CAD/CAM lithium disilicate and virgilite ceramic with atomic force microscopy (AFM) and visual assessment performed by dental students and faculty. METHODS AND MATERIALS Sixty maxillary right central incisor crowns made of a novel chairside CAD/CAM lithium disilicate and virgilite (CEREC Tessera) were milled for glazing and polishing. The crowns were divided into six groups: no polishing/glazing provided (NoP/G); glazed (GZ); glazed and polished with Brasseler Dialite LD Lithium Disilicate (DiLD); glazed and polished with Meisinger Luster Lithium Disilicate (LuLD); glazed and polished with Brasseler Dialite ZR Zirconia (DiZR); and glazed and polished with Meisinger Luster Zirconia (LuZR). Surfaces were scanned with AFM to measure roughness (Ra) and root mean square roughness (Rq) and generate micrographs. Crowns were visually assessed by 10 dental students and 10 dental school faculty members to determine clinical acceptableness. RESULTS Glazing and all polishing kits significantly reduced Ra and Rq compared to no polishing/glazing. No significant Ra differences were found between glazing and all polishing kits (p>0.05). DiZR significantly reduced Rq compared to other groups (p<0.05). Visual assessment showed that GZ, LuLD, and DiZR were the most clinically acceptable crowns. CONCLUSION Polishing and glazing considerably improve the surface smoothness of maxillary central incisor crowns fabricated out of a chairside CAD/CAM lithium disilicate and virgilite ceramic. Altogether, zirconia polishing systems provided smoother and more clinically acceptable surfaces than the lithium disilicate kits.
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Affiliation(s)
- C A Jurado
- Carlos A Jurado, DDS, MS, associate professor, Department of Prosthodontics, The University of Iowa College of Dentistry and Dental Clinics, Iowa City, Iowa, USA
| | - K Arndt
- Katlyn Arndt, BS, dental student, Texas Tech University Health Sciences Center El Paso, Woody L Hunt School of Dental Medicine, El Paso, Texas, USA
| | - F X Azpiazu-Flores
- Francisco X Azpiazu-Flores, DDS, MS, assistant professor, University of Manitoba, Gerald Niznick College of Dentistry, Winnipeg, Manitoba, Canada; ITI Scholar at the Implant Center and Department of Prosthodontics, Indiana University School of Dentistry, Indianapolis, IN, USA
| | - F Faddoul
- Fady Faddoul, DDS, MSD, associate dean, Clinical Affairs, Texas Tech University Health Sciences Center El Paso, Woody L Hunt School of Dental Medicine, El Paso, Texas, USA
| | - R França
- Rodrigo França, DDS, MS, PhD, associate professor, University of Manitoba, Gerald Niznick College of Dentistry, Winnipeg, Manitoba, Canada
| | - N G Fischer
- *Nicholas G Fischer, PhD, fellow, Minnesota Dental Research Center for Biomaterials and Biomechanics, University of Minnesota School of Dentistry, Minneapolis, Minnesota, USA
| | - H Watanabe
- Hidehiko Watanabe, DDS, MS, professor, Department of Restorative Dentistry, Oregon Health and Sciences University School of Dentistry, Portland, Oregon, USA
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Azpiazu-Flores FX, Johnston WM, Mata-Mata SJ, Yilmaz B. Positional trueness of three removable die designs with different root geometries manufactured using stereolithographic 3D printing. J Prosthet Dent 2023:S0022-3913(23)00606-6. [PMID: 37802737 DOI: 10.1016/j.prosdent.2023.08.036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Revised: 08/30/2023] [Accepted: 08/31/2023] [Indexed: 10/08/2023]
Abstract
STATEMENT OF PROBLEM Three-dimensional (3D) printed casts are a suitable alternative to dental stone casts. Contemporary dental design computer programs permit designing definitive casts with removable dies with different root geometries and retention mechanisms. Studies on the positional trueness of 3D-printed removable dies with different root geometries are lacking. PURPOSE The purpose of this in vitro study was to investigate the 3D displacements of three 3D-printed removable die designs with different root geometries. MATERIAL AND METHODS The digital file of a dental stone alveolar cast with root-form removable dies (MOD UJ IV Fixed Prosthetics; Ivoclar AG) was used as a reference to create 3 removable die and alveolar cast designs (Root Form, RF; Conical, CON; Cylindric, CYL) with different root geometries in 2 dental design computer programs (DentalCAD 3.1 Rijeka; exocad; GmbH; InLab CAD 22.0; Dentsply Sirona). 3 equidistant Ø1-mm spheres (C, Cervical; M, Middle; O, Occlusal) were designed on the buccal surface of the coronal portion of the removable die to evaluate their displacement. A total of 45 alveolar casts with 45 removable dies were fabricated using a stereolithographic 3D printer (Form 3; Formlabs); each die group consisted of 15 specimens. After fabrication and postprocessing, the specimens were scanned, and their digital files were analyzed in a metrology-grade computer program to evaluate the displacement of the removable dies with respect to the position of the die in the master reference file. Subsequently, the data were analyzed using a 3-way analysis of variance (ANOVA) followed by step-down Bonferroni-corrected pairwise comparisons (α=.05). RESULTS Two statistically significant 2-way interactions were detected between the independent variables, die design and direction (P<.001), and location and direction (P<.001). The post hoc analysis identified significant differences between the displacement values of RF and CYL (P<.001) and RF and the CON (P<.001) designs on the Y axis. The measured displacements were statistically different between the C and O locations on the Y axis (P=.001) and the M and O locations on the Z axis (P=.006). CONCLUSIONS The root geometry of a 3D-printed removable die and alveolar cast can affect seating, and variable degrees of tipping of the removable die can be seen. The seating and congruence of the removable die with the interocclusal space and relationships observed intraorally should be confirmed before adjusting indirect restorations.
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Affiliation(s)
- Francisco X Azpiazu-Flores
- ITI Scholar, Department of Prosthodontics, School of Dentistry, Indiana Univeristy, Indianapolis, Ind; and Assistant Professor, Department of Restorative Dentistry, Dr. Gerald Niznick College of Dentistry, University of Manitoba, Winnipeg, Canada
| | - William M Johnston
- Professor Emeritus, Division of Restorative and Prosthetic Dentistry, College of Dentistry, The Ohio State University, Columbus, Ohio
| | - Severino J Mata-Mata
- Assistant Professor, Faculty of Dentistry, Francisco Marroquín University (UFM), Guatemala City, Guatemala
| | - Burak Yilmaz
- Associate Professor, Department of Reconstructive Dentistry and Gerodontology, School of Dental Medicine, University of Bern, Bern, Switzerland; Associate Professor, Department of Restorative, Preventive and Pediatric Dentistry, School of Dental Medicine, University of Bern, Bern, Switzerland; and Adjunct Professor, Division of Restorative and Prosthetic Dentistry, The Ohio State University College of Dentistry, Columbus, Ohio..
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Lee JH, Pfeffer J, Jurado CA, Azpiazu-Flores FX. Using the foundation restoration as a blueprint: An uncomplicated approach to retrofitting crowns to existing removable partial dentures using CAD-CAM technology. J Prosthet Dent 2023:S0022-3913(23)00544-9. [PMID: 37741726 DOI: 10.1016/j.prosdent.2023.08.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Revised: 07/31/2023] [Accepted: 08/01/2023] [Indexed: 09/25/2023]
Abstract
Removable partial dentures have been used to rehabilitate partially edentulous patients for decades. A challenging but commonly encountered procedure is retrofitting a crown to an existing removable partial denture. Several techniques have been proposed for fabricating these complex prostheses, some involving the intraoral application of polymers to the abutment tooth or making impressions of the preparation with the removable prosthesis seated. The present technique presents an approach that simplifies the design and fabrication of retrofitted crowns for fractured abutment teeth needing foundation restorations. This approach involves the implementation of computer-aided design and computer-aided manufacturing technology to record and utilize the contours of the foundation restoration established intraorally as a blueprint for the retrofitted crown.
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Affiliation(s)
- Jae-Hoon Lee
- Dental student, General Dentistry Program, Dr. Gerald Niznick College of Dentistry University of Manitoba, Winnipeg, Manitoba, Canada
| | - Juliana Pfeffer
- Assistant Professor, Department of Restorative Dentistry, Dr. Gerald Niznick College of Dentistry, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Carlos A Jurado
- Associate Professor, Department of Prosthodontics, College of Dentistry and Dental Clinics, The University of Iowa, Iowa City, Iowa
| | - Francisco X Azpiazu-Flores
- ITI Scholar, Department of Prosthodontics, Indiana University School of Dentistry, Indianapolis, IN; Assistant Professor, Department of Restorative Dentistry, Dr. Gerald Niznick College of Dentistry, University of Manitoba, Winnipeg, Manitoba, Canada..
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14
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Jurado CA, Bora PV, Azpiazu-Flores FX, Cho SH, Afrashtehfar KI. Effect of resin cement selection on fracture resistance of chairside CAD-CAM lithium disilicate crowns containing virgilite: A comparative in vitro study. J Prosthet Dent 2023:S0022-3913(23)00558-9. [PMID: 37739880 DOI: 10.1016/j.prosdent.2023.08.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2023] [Revised: 08/21/2023] [Accepted: 08/22/2023] [Indexed: 09/24/2023]
Abstract
STATEMENT OF PROBLEM Studies on the fracture performance of a recently introduced computer-aided design and computer-aided manufacturing (CAD-CAM) lithium disilicate ceramic containing virgilite with different cements are lacking. PURPOSE The purpose of this in vitro study was to evaluate the fracture resistance of crowns made of a recently introduced chairside CAD-CAM lithium disilicate containing virgilite cemented with different types of adhesive luting cement. MATERIAL AND METHODS Sixty complete coverage crowns for a maxillary right central incisor were milled out of a lithium disilicate with virgilite (CEREC Tessera) (n=48) and a traditional lithium disilicate (e.max CAD) (n=12) using a chairside CAD-CAM system (Primescan). The central incisor tooth preparation included a 1.5-mm incisal reduction, a 1.0-mm axial reduction, and a 1.0-mm chamfer finish line. The restorations were bonded with different types of resin cement to 3D printed dies of the tooth preparation and were divided into 5 groups (n=12 per group): e.max CAD with Multilink Automix (E.Mu); Tessera with Multilink Automix (T.Mu); Tessera with Calibra (T.Ca); Tessera with Unicem (T.Un); and Tessera with Speedcem (T.Sp). The cemented restorations were stored in water for 30 days and then loaded until they were fractured in compression. The load at fracture was analyzed with a 1-way analysis of variance (ANOVA) and the honestly significant difference (HSD) Tukey test (α=.05). RESULTS The mean fracture resistance of traditional lithium disilicate and virgilite lithium disilicate anterior crowns significantly differed depending on the type of resin cement used (P<.05). Group E.Mu displayed the highest values (946.35 ±155 N), followed by group T.Un (819.59 ±232 N), group T.Sp (675.52 ±153 N), and group T.Mu (656.95 ±193 N). The lowest values were displayed by group T.Ca (567.94 ±184 N). CONCLUSIONS The fracture resistance of lithium disilicate containing virgilite and traditional lithium disilicate crowns cemented with the same cement displayed statistically similar values. However, significant differences were observed when the virgilite lithium disilicate crowns were cemented with different types of adhesive luting cement. The crowns in the T.Ca group displayed the lowest fracture resistance.
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Affiliation(s)
- Carlos A Jurado
- Clinical Associate Professor, Department of Prosthodontics, The University of Iowa College of Dentistry and Dental Clinics, Iowa City, Iowa.
| | - Pranit V Bora
- Resident, Master of Sciences in Dental Materials Program, School of Dentistry, University of Alabama at Birmingham, Birmingham, Ala.
| | - Francisco X Azpiazu-Flores
- Assistant Professor, Department of Restorative Dentistry, Gerald Niznick College of Dentistry, University of Manitoba, Winnipeg, Manitoba, Canada; ITI Scholar, Department of Prosthodontics, Indiana University School of Dentistry, Indianapolis, Ind.
| | - Seok-Hwan Cho
- Associate Professor and Department Chair, Department of Prosthodontics, The University of Iowa College of Dentistry and Dental Clinics, Iowa City, Iowa.
| | - Kelvin I Afrashtehfar
- Assistant Professor and Director of Evidence-Based Practice Unit, Clinical Sciences Department, College of Dentistry, Ajman University, Ajman City, AE, United Arab Emirates; Adjunct Research Professor, Department of Reconstructive Dentistry and Gerodontology, School of Dental Medicine, University of Bern, Bern, Switzerland; Senior Scientific Researcher, Artificial Intelligence Research Center (AIRC), Ajman University, Dubai, United Arab Emirates; and Visiting Professor, Department of Prosthodontics, College of Dentistry, Yonsei University, Seoul, Republic of Korea..
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15
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Jurado CA, Ahmed AS, Lawson NC, Azpiazu-Flores FX, Green C, Cho SH. Fracture resistance of zirconia surveyed crowns with four different occlusal rest seat designs. J Prosthodont 2023. [PMID: 37471621 DOI: 10.1111/jopr.13737] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Revised: 07/10/2023] [Accepted: 07/14/2023] [Indexed: 07/22/2023] Open
Abstract
PURPOSE To determine the fracture resistance of chairside computer-aided design and computer-aided manufacturing (CAD-CAM) zirconia surveyed crowns for a mandibular first molar without occlusal rest and with four different rest seat designs. MATERIALS AND METHODS Seventy CAD-CAM zirconia 4Y-PSZ (IPS e.max ZirCAD MT for CEREC A1, C15, Ivoclar Vivadent) crowns (14 specimens/group) were designed and fabricated with a dental chairside CAD-CAM system (CEREC PrimeScan, and CEREC MCXL Dentsply Sirona). The restorations were divided into groups according to the following rest seat designs: (1) Surveyed crown without rest seat, (2) surveyed crowns with disto-occlusal rest seat, (3) surveyed crowns with disto-occlusal extended rest seat, (4) surveyed crowns with interproximal rest seat, and (5) continuous rest seat. Crowns were treated with a primer system (Monobond Plus, Ivoclar Vivadent) and cemented using resin luting cement (Multilink Automix, Ivoclar Vivadent) to resin-printed dies (Grey Resin V4, FormLabs). Subsequently, the crowns were subjected to 200,000 load cycles at 1 Hz with 20 N force and then loaded with a steel indenter until fracture. The test results were analyzed with One-Way Analysis of Variance (ANOVA) and HSD Tukey Post-Hoc test. RESULTS The mean fracture resistance of surveyed crowns without and with different rest seats was significantly different from each other. Surveyed crowns with no rest seat displayed the highest resistance (4238 N) followed by crowns with continuous rest seat (3601 N), crowns with disto-occlusal extended rest seat (3283 N), and crowns with disto-occlusal rest seat (3257 N). Crowns with interproximal rest seat displayed the lowest fracture resistance (2723 N). CONCLUSIONS Surveyed crowns without rest seats had a higher fracture resistance than crowns with rest seats Surveyed crowns with interproximal rest seats presented the lowest fracture resistance among all rest seat designs. Crowns with disto-occlusal rest seats, disto-occlusal extended rest seats, and continuous rest seats displayed similar fracture resistance. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Carlos Alberto Jurado
- Department of Prosthodontics, The University of Iowa College of Dentistry and Dental Clinics, Iowa City, Iowa, USA
| | - Akram Sayed Ahmed
- University of Alabama at Birmingham School of Dentistry, Birmingham, AL, USA
| | - Nathaniel C Lawson
- Department of Clinical and Community Sciences, University of Alabama at Birmingham School of Dentistry, Birmingham, AL, USA
| | - Francisco X Azpiazu-Flores
- Department of Restorative Dentistry, University of Manitoba Gerald Niznick College of Dentistry, Winnipeg, MB, Canada
| | - Conley Green
- Texas Tech University School of Dentistry, El Paso, TX, USA
| | - Seok-Hwan Cho
- The University of Iowa College of Dentistry and Dental Clinics, Iowa City, Iowa, USA
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16
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Guzman-Perez G, Jurado CA, Azpiazu-Flores FX, Munoz-Luna H, Afrashtehfar KI, Nurrohman H. Soft Tissue Grafting Procedures before Restorations in the Esthetic Zone: A Minimally Invasive Interdisciplinary Case Report. Medicina (Kaunas) 2023; 59:medicina59050822. [PMID: 37241054 DOI: 10.3390/medicina59050822] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 04/12/2023] [Accepted: 04/19/2023] [Indexed: 05/28/2023]
Abstract
An esthetically pleasing smile is a valuable aspect of physical appearance and plays a significant role in social interaction. Achieving the perfect balance between extraoral and intraoral tissues is essential for a harmonious and attractive smile. However, certain intraoral deficiencies, such as non-carious cervical lesions and gingival recession, can severely compromise the overall aesthetics, particularly in the anterior zone. Addressing such conditions requires careful planning and meticulous execution of both surgical and restorative procedures. This interdisciplinary clinical report presents a complex case of a patient with esthetic complaints related to asymmetric anterior gingival architecture and severely discolored and eroded maxillary anterior teeth. The patient was treated using a combination of minimally invasive ceramic veneers and plastic mucogingival surgery, resulting in a successful outcome. The report emphasizes the potential of this approach in achieving optimal esthetic results in challenging cases, highlighting the importance of an interdisciplinary team approach in achieving a harmonious balance between dental and soft tissue aesthetics.
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Affiliation(s)
- Gerardo Guzman-Perez
- Department of Graduate Periodontics, Multidisciplinary Educational Center in Oral Rehabilitation (CEMRO), Tarímbaro 58893, Mexico
| | - Carlos Alberto Jurado
- Department of Prosthodontics, The University of Iowa College of Dentistry and Dental Clinics, Iowa City, IA 52242, USA
| | - Francisco X Azpiazu-Flores
- Department of Restorative Dentistry, Gerald Niznick College of Dentistry, University of Manitoba, Winnipeg, MB R3E 3N4, Canada
| | | | - Kelvin I Afrashtehfar
- Division of Restorative Dental Sciences, Clinical Sciences Department, Ajman College of Dentistry, Ajman City P.O. Box 346, United Arab Emirates
- Department of Reconstructive Dentistry and Gerodontology, School of Dental Medicine, University of Bern, 3010 Bern, Switzerland
| | - Hamid Nurrohman
- Missouri School of Dentistry & Oral Health, A.T. Still University, Kirksville, MO 63501, USA
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17
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Robles M, Jurado CA, Azpiazu-Flores FX, Villalobos-Tinoco J, Afrashtehfar KI, Fischer NG. An Innovative 3D Printed Tooth Reduction Guide for Precise Dental Ceramic Veneers. J Funct Biomater 2023; 14:216. [PMID: 37103306 PMCID: PMC10146615 DOI: 10.3390/jfb14040216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Revised: 03/16/2023] [Accepted: 04/09/2023] [Indexed: 04/28/2023] Open
Abstract
Tooth reduction guides allow clinicians to obtain the ideal space required for ceramic restorations. This case report describes a novel design (CAD) for an additive computer-aided manufactured (a-CAM) tooth reduction guide with channels that permitted access for the preparation and evaluation of the reduction with the same guide. The guide features innovative vertical and horizontal channels that permit comprehensive access for preparation and evaluation of the reduction with a periodontal probe, ensuring uniform tooth reduction and avoiding overpreparation. This approach was successfully applied to a female patient with non-carious lesions and white spot lesions, resulting in minimally invasive tooth preparations and hand-crafted laminate veneer restorations that met the patient's aesthetic demands while preserving tooth structure. Compared to traditional silicone reduction guides, this novel design offers greater flexibility, enabling clinicians to evaluate tooth reduction in all directions and providing a more comprehensive assessment. Overall, this 3D printed tooth reduction guide represents a significant advancement in dental restoration technology, offering clinicians a useful tool for achieving optimal outcomes with minimal tooth reduction. Future work is warranted to compare tooth reductions and preparation time for this guide to other 3D printed guides.
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Affiliation(s)
- Manuel Robles
- Department of Restorative Dentistry, Facultad de Odontologia, Universidad Vizcaya de las Americas, Hermosillo 83240, Mexico
| | - Carlos A. Jurado
- Department of Prosthodontics, The University of Iowa College of Dentistry and Dental Clinics, Iowa City, IA 52242, USA
| | - Francisco X. Azpiazu-Flores
- Department of Restorative Dentistry, Dr. Gerald Niznick College of Dentistry, University of Manitoba, Winnipeg, MB R3E 0W3, Canada
| | - Jose Villalobos-Tinoco
- Postgraduate Program in Periodontology and Implant Surgery, Facultad de Odontologia, Universidad Nacional de Rosario, Rosario S2002KTT, Argentina
| | - Kelvin I. Afrashtehfar
- Evidence-Based Practice Unit, Clinical Sciences Department, College of Dentistry, Ajman University, Ajman City P.O. Box 346, United Arab Emirates
- Department of Reconstructive Dentistry and Gerodontology, School of Dental Medicine, University of Bern, 3010 Bern, Switzerland
| | - Nicholas G. Fischer
- Minnesota Dental Research Center for Biomaterials and Biomechanics, University of Minnesota School of Dentistry, Minneapolis, MN 55108, USA
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Azpiazu-Flores FX, Lee DJ, Jurado CA, Nurrohman H. 3D-Printed Overlay Template for Diagnosis and Planning Complete Arch Implant Prostheses. Healthcare (Basel) 2023; 11:healthcare11081062. [PMID: 37107896 PMCID: PMC10137737 DOI: 10.3390/healthcare11081062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Revised: 03/31/2023] [Accepted: 04/05/2023] [Indexed: 04/29/2023] Open
Abstract
Dental implants are a reliable alternative to treating edentulism. In clinical situations where the dentition has been severely affected by partial edentulism, advanced wear, or periodontal disease, establishing important occlusal elements such as the occlusal plane, incisal guidance, and esthetics can be hard to visualize at the diagnostic stage. Contemporary data-acquisition technologies such as 3D scanners and CAD/CAM systems permit the precise manufacture of highly complex devices applicable to any stage of restorative treatment. The present clinical report presents an alternative technique for evaluating the projected artificial tooth relationships, vertical dimension, and occlusal plane in patients with severely weakened dentition by using a 3D-printed overlay template.
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Affiliation(s)
- Francisco X Azpiazu-Flores
- Department of Restorative Dentistry, Gerald Niznick College of Dentistry, University of Manitoba, Winnipeg, MB R3E 0W3, Canada
| | - Damian J Lee
- Director Advanced Prosthodontics Residency Program, College of Dentistry, The Ohio State University, Columbus, OH 43210, USA
| | - Carlos A Jurado
- Department of Prosthodontics, College of Dentistry and Dental Clinics, The University of Iowa, Iowa City, IA 52242, USA
| | - Hamid Nurrohman
- Missouri School of Dentistry & Oral Health, A.T. Still University, Kirksville, MO 63501, USA
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19
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Azpiazu-Flores FX, Lee DJ, Jurado CA, Afrashtehfar KI, Alhotan A, Tsujimoto A. Full-Mouth Rehabilitation of a Patient with Sjogren's Syndrome with Maxillary Titanium-Zirconia and Mandibular Monolithic Zirconia Implant Prostheses Fabricated with CAD/CAM Technology: A Clinical Report. J Funct Biomater 2023; 14:jfb14040174. [PMID: 37103264 PMCID: PMC10143958 DOI: 10.3390/jfb14040174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Revised: 03/21/2023] [Accepted: 03/21/2023] [Indexed: 04/28/2023] Open
Abstract
Dental implants have become a well-established treatment modality for the management of complete and partial edentulism. Recent advancements in dental implant systems and CAD/CAM technologies have revolutionized prosthodontic practice by allowing for the predictable, efficient, and faster management of complex dental scenarios. This clinical report describes the interdisciplinary management of a patient with Sjogren's syndrome and terminal dentition. The patient was rehabilitated using dental implants and zirconia-based prostheses in the maxillary and mandibular arches. These prostheses were fabricated using a combination of CAD/CAM and analog techniques. The successful outcomes for the patient demonstrate the importance of appropriate use of biomaterials and the implementation of interdisciplinary collaboration in treating complex dental cases.
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Affiliation(s)
- Francisco X Azpiazu-Flores
- Department of Restorative Dentistry, Gerald Niznick College of Dentistry University of Manitoba, Winnipeg, MB R3E 0W3, Canada
| | - Damian J Lee
- Division of Restorative and Prosthetic Dentistry, College of Dentistry, The Ohio State University, Columbus, OH 43210, USA
| | - Carlos A Jurado
- Department of Prosthodontics, University of Iowa College of Dentistry, Iowa City, IA 52242, USA
| | - Kelvin I Afrashtehfar
- Division of Restorative Dental Sciences, Clinical Sciences Department, Ajman University College of Dentistry, Ajman City 346, United Arab Emirates
- Department of Reconstructive Dentistry and Gerodontology, School of Dental Medicine, University of Bern, 3010 Bern, Switzerland
| | - Abdulaziz Alhotan
- Dental Health Department, King Saud University College of Applied Medical Sciences, Riyadh 1145, Saudi Arabia
| | - Akimasa Tsujimoto
- Department of Operative Dentistry, University of Iowa College of Dentistry, Iowa City, IA 52242, USA
- Department of General Dentisry, Creigthon University School of Dentisry, Omaha, NE 68102, USA
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Loo CA, Azpiazu-Flores FX. Radiographic template used to facilitate the alignment of digital scans to computed tomography scans with extensive beam hardening artifacts. J Prosthet Dent 2023; 129:520-522. [PMID: 34493392 DOI: 10.1016/j.prosdent.2021.07.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Revised: 07/09/2021] [Accepted: 07/12/2021] [Indexed: 11/28/2022]
Affiliation(s)
- Christian A Loo
- Graduate student, Advanced Prosthodontics Program, Division of Restorative and Prosthetic Dentistry, College of Dentistry, The Ohio State University, Columbus, Ohio.
| | - Francisco X Azpiazu-Flores
- Graduate student, Advanced Prosthodontics Program, Division of Restorative and Prosthetic Dentistry, College of Dentistry, The Ohio State University, Columbus, Ohio
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21
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Azpiazu-Flores FX, Lee DJ, Mata-Mata SJ, Zheng F. Rehabilitation of a patient with mandibular flexure using contemporary glass-infiltrated high performance CAD-CAM polymers: A clinical report with 1-year follow-up. J Prosthet Dent 2023:S0022-3913(23)00057-4. [PMID: 36828729 DOI: 10.1016/j.prosdent.2022.12.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Revised: 12/14/2022] [Accepted: 12/14/2022] [Indexed: 02/24/2023]
Abstract
Mandibular flexure is a phenomenon generated by the action of the muscles of mastication and other muscles in the head and neck region which can lead to prosthetic and biological complications such as pain, material fracture, and bone loss around dental implants. To avoid such complications, dividing the mandibular prostheses into 3 short-span prostheses or sectioning at the midline has been suggested. This clinical report presents the management of an edentulous patient with clinically detectable mandibular flexure treated with a 1-piece metal-free complete arch implant-supported prosthesis.
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Affiliation(s)
- Francisco X Azpiazu-Flores
- Former Graduate student, Advanced Prosthodontics Program, The Ohio State University, Columbus, Ohio; Assistant Professor, Department of Restorative Dentistry, Dr. Gerald Niznick College of Dentistry, University of Manitoba, Winnipeg, Canada.
| | - Damian J Lee
- Associate Professor, Division of Restorative and Prosthetic Dentistry, College of Dentistry, The Ohio State University, Columbus, Ohio; Director of the Advanced Prosthodontics Program, Division of Restorative and Prosthetic Dentistry, College of Dentistry, The Ohio State University, Columbus, Ohio
| | - Severino J Mata-Mata
- Former Graduate student, Advanced Prosthodontics Program, The Ohio State University, Columbus, Ohio; Private Practitioner and Assistant Professor, Facultad de Odontologia, Universidad Francisco Marroquin, Ciudad de Guatemala, Guatemala
| | - Fengyuan Zheng
- Clinical Associate Professor, Department of Restorative Sciences, Division of Prosthodontics, University of Minnesota School of Dentistry, Minneapolis, Minn
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22
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Azpiazu-Flores FX, Knobloch LA, Larsen PE. Interdisciplinary Management of a Patient with Dentinogenesis Imperfecta Type II Using a Combination of CAD-CAM and Analog Techniques: A Clinical Report. J Prosthodont 2022; 31:647-654. [PMID: 35675448 DOI: 10.1111/jopr.13556] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Accepted: 05/29/2022] [Indexed: 11/29/2022] Open
Abstract
Type II dentinogenesis imperfecta is an autosomal dominant condition that affects dentin which increases the complexity of the predictability of restorative treatment. Computer-aided design and computer-aided manufacturing (CAD-CAM) technologies permit the creation of highly accurate devices and dental prostheses that simplify the planning and execution of advanced implant surgery and full-mouth rehabilitation. This clinical report presents the interdisciplinary management of a 20-year-old male with dentinogenesis imperfecta type II. In this article, a combination of analog and CAD-CAM technologies were used to fabricate devices that aided planning, assisted intermaxillary fixation and implant placement, served as interim prostheses, and permitted the accurate establishment of esthetics and occlusion of the definitive full-arch prostheses.
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Affiliation(s)
- Francisco X Azpiazu-Flores
- Advanced Prosthodontics Program, The Ohio State University College of Dentistry, Columbus, OH.,Department of Restorative Dentistry, Dr. Gerald Niznick College of Dentistry, University of Manitoba, Winnipeg, Canada
| | - Lisa A Knobloch
- Division of Restorative and Prosthetic Dentistry, The Ohio State University College of Dentistry, Columbus, OH
| | - Peter E Larsen
- Division of Oral and Maxillofacial Surgery and Anesthesiology, The Ohio State University College of Dentistry, Columbus, OH
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23
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Leyva Del Rio D, Sandoval-Sanchez E, Campos-Villegas NE, Azpiazu-Flores FX, Zavala-Alonso NV. Influence of Heated Hydrofluoric Acid Surface Treatment on Surface Roughness and Bond Strength to Feldspathic Ceramics and Lithium-Disilicate Glass-Ceramics. J Adhes Dent 2021; 23:549-555. [PMID: 34817970 DOI: 10.3290/j.jad.b2288275] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
PURPOSE To evaluate the effect of heated and room-temperature hydrofluoric (HF) acid on surface roughness parameters (Ra and Rq) and microtensile bond strength (μTBS) on feldspathic ceramic and lithium-disilicate glass-ceramics. MATERIALS AND METHODS Disk-shaped samples made from both ceramics were divided into groups according to surface treatment: feldspathic ceramic polished surface (FP), feldspathic ceramic + 60 s of 9% HF acid etching at room temperature (FC), feldspathic ceramic + 60 s of 9% HF acid etching heated to 70°C (F70), lithium-disilicate polished surface only (LP), lithium disilicate + 20 s of 9% HF acid etching at room temperature (LC), and lithium disilicate + 20 s of 9% HF acid etching heated to 70°C (L70). To evaluate Ra and Rq, non-overlapping readings were taken on the surface of each sample with a contact stylus profilometer. To measure microtensile bond strength (μTBS), samples of groups FC, F70, LC and L70 received their corresponding surface treatment, were silanized and then bonded using a dual-cure composite cement to resin composite disks. After 24 h, samples were sectioned to obtain specimens for μTBS. Representative samples from each group were examined using scanning electron microscopy (SEM) to analyze the morphology of the etched surface. The data were analyzed for statistical significance using Welch's ANOVA with the Games-Howell multiple-comparison post-hoc test. RESULTS For both surface roughness parameters and HF acid etching at room temperature (FC and LC) showed a significant increase (p < 0.001) in surface roughness when compared to polished surfaces (FP and LP). Furthermore, the use of heated HF acid etching significantly increased (p < 0.001) the surface roughness of the ceramic when compared to their counterpart sample of HF acid etching at room temperature. Group L70 obtained the highest μTBS of all groups (29.11 ± 8.26 MPa) and was significantly higher (p < 0.001) than that of the other experimental groups. There were no statistical differences (p > 0.05) between groups FC (19.94 ± 4.14), F70 (18.24 ± 5.29), and LC (17.87 ± 6.96). CONCLUSION The use of 9% HF acid etching heated to 70°C resulted in significantly higher surface roughness and improved bond strength onto lithium-disilicate glass-ceramic compared to surface HF acid etching at room temperature.
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Azpiazu-Flores FX, Mata-Mata SJ. Overlay occlusion rim technique to facilitate the recording of maxillomandibular relationships. J Prosthet Dent 2020; 126:715-717. [PMID: 33129500 DOI: 10.1016/j.prosdent.2020.09.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Revised: 09/08/2020] [Accepted: 09/09/2020] [Indexed: 10/23/2022]
Affiliation(s)
- Francisco X Azpiazu-Flores
- Graduate student, Advanced Prosthodontics Program, Division of Restorative and Prosthetic Dentistry, College of Dentistry, The Ohio State University, Columbus, Ohio.
| | - Severino J Mata-Mata
- Graduate student, Advanced Prosthodontics Program, Division of Restorative and Prosthetic Dentistry, College of Dentistry, The Ohio State University, Columbus, Ohio
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Azpiazu-Flores FX, Lee DJ, Lang LA. Weighted mandibular complete denture fabricated by using selective laser melting: A clinical report. J Prosthet Dent 2020; 126:144-149. [PMID: 32893019 DOI: 10.1016/j.prosdent.2020.06.016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Revised: 06/04/2020] [Accepted: 06/05/2020] [Indexed: 11/27/2022]
Abstract
The rehabilitation of patients with severely resorbed mandibular ridges can be a clinical challenge when rehabilitation with endosteal implants is not the elected treatment. Historically, weighted mandibular complete dentures have been used successfully to manage patients with severely resorbed ridges, and the weight of their cast metal has been calculated by using the weight of the wax and the density of the alloy. This clinical report presents the management of an 87-year-old woman with a severely resorbed mandibular ridge by using a weighted mandibular complete denture fabricated by using selective laser melting (SLM) technology in which the weight of the metal base was calculated by using the volume of the digital file used for manufacture.
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Affiliation(s)
- Francisco X Azpiazu-Flores
- Graduate student, Advanced Prosthodontics Program, Division of Restorative and Prosthetic Dentistry, College of Dentistry, The Ohio State University, Columbus, Ohio.
| | - Damian J Lee
- Assistant Professor and Director of the Advanced Prosthodontics Program, Division of Restorative and Prosthetic Dentistry, College of Dentistry, The Ohio State University, Columbus, Ohio
| | - Lisa A Lang
- Chair, Division of Restorative and Prosthetic Dentistry, College of Dentistry, The Ohio State University, Columbus, Ohio
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Azpiazu-Flores FX, Mata-Mata SJ. A straightforward approach to conservative screw access for implant-supported fixed complete dentures. J Prosthet Dent 2020; 125:194-196. [PMID: 32414587 DOI: 10.1016/j.prosdent.2020.03.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2020] [Revised: 03/02/2020] [Accepted: 03/03/2020] [Indexed: 11/19/2022]
Affiliation(s)
- Francisco X Azpiazu-Flores
- Graduate student, Advanced Prosthodontics Program, Division of Restorative and Prosthetic Dentistry, College of Dentistry, The Ohio State University, Columbus, Ohio.
| | - Severino J Mata-Mata
- Graduate student, Advanced Prosthodontics Program, Division of Restorative and Prosthetic Dentistry, College of Dentistry, The Ohio State University, Columbus, Ohio
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