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Jimenez-Bueno I, Garcia-Contreras R, Aranda-Herrera B, Sakagami H, Lopez-Ayuso CA, Nakajima H, Jurado CA, Nurrohman H. Cytotoxicity, Differentiation, and Biocompatibility of Root-End Filling: A Comprehensive Study. Biomimetics (Basel) 2023; 8:514. [PMID: 37999155 PMCID: PMC10669418 DOI: 10.3390/biomimetics8070514] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2023] [Revised: 10/11/2023] [Accepted: 10/26/2023] [Indexed: 11/25/2023] Open
Abstract
Assessing the biocompatibility of endodontic root-end filling materials through cell line responses is both essential and of utmost importance. This study aimed to the cytotoxicity of the type of cell death through apoptosis and autophagy, and odontoblast cell-like differentiation effects of MTA, zinc oxide-eugenol, and two experimental Portland cements modified with bismuth (Portland Bi) and barium (Portland Ba) on primary cell cultures. Material and methods: The cells corresponded to human periodontal ligament and gingival fibroblasts (HPLF, HGF), human pulp cells (HPC), and human squamous carcinoma cells from three different patients (HSC-2, -3, -4). The cements were inoculcated in different concentrations for cytotoxicity evaluation, DNA fragmentation in electrophoresis, apoptosis caspase activation, and autophagy antigen reaction, odontoblast-like cells were differentiated and tested for mineral deposition. The data were subject to a non-parametric test. Results: All cements caused a dose-dependent reduction in cell viability. Contact with zinc oxide-eugenol induced neither DNA fragmentation nor apoptotic caspase-3 activation and autophagy inhibitors (3-methyladenine, bafilomycin). Portland Bi accelerated significantly (p < 0.05) the differentiation of odontoblast-like cells. Within the limitation of this study, it was concluded that Portland cement with bismuth exhibits cytocompatibility and promotes odontoblast-like cell differentiation. This research contributes valuable insights into biocompatibility, suggesting its potential use in endodontic repair and biomimetic remineralization.
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Affiliation(s)
- Ignacio Jimenez-Bueno
- Department of Endodontics, Faculty of Dentistry, Autonomous University State of Mexico (UAEMex), Toluca 50130, State of Mexico, Mexico;
| | - Rene Garcia-Contreras
- Interdisciplinary Research Laboratory, Nanostructures and Biomaterials Area, National School of Higher Studies (ENES) Leon, National Autonomous University of Mexico (UNAM), Leon 37684, Guanajuato, Mexico; (R.G.-C.); (C.A.L.-A.)
| | - Benjamin Aranda-Herrera
- Interdisciplinary Research Laboratory, Nanostructures and Biomaterials Area, National School of Higher Studies (ENES) Leon, National Autonomous University of Mexico (UNAM), Leon 37684, Guanajuato, Mexico; (R.G.-C.); (C.A.L.-A.)
| | - Hiroshi Sakagami
- Meikai University Research Institute of Odontology (M-RIO), Meikai University School of Dentistry, Sakado 350-0283, Saitama, Japan;
| | - Christian Andrea Lopez-Ayuso
- Interdisciplinary Research Laboratory, Nanostructures and Biomaterials Area, National School of Higher Studies (ENES) Leon, National Autonomous University of Mexico (UNAM), Leon 37684, Guanajuato, Mexico; (R.G.-C.); (C.A.L.-A.)
| | - Hiroshi Nakajima
- Division of Dental Biomaterials Science, Department of Restorative and Biomaterials Sciences, Meikai University School of Dentistry, Sakado 350-0283, Saitama, Japan
| | - Carlos A. Jurado
- Department of Prosthodontics, The University of Iowa College of Dentistry and Dental Clinics, Iowa City, IA 52242, USA
| | - Hamid Nurrohman
- Department of Restorative Dentistry & Prosthodontics, University of Texas School of Dentistry, Houston, TX 77054, USA
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Rahhal MM, Awad R, Fayyad A, Nurrohman H, Jurado CA. A Modified Ridge-Splitting Technique to Restore a Completely Edentulous Maxillary Arch With a Cement-Retained Implant Prosthesis. Cureus 2023; 15:e45299. [PMID: 37846271 PMCID: PMC10576958 DOI: 10.7759/cureus.45299] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/15/2023] [Indexed: 10/18/2023] Open
Abstract
The present report describes a technique in which the maxillary bone was molded to the desired location using a series of instruments for ridge-splitting procedures. This technique aims to improve bone quality all around the implants at both the crest and apex locations. In some clinical scenarios, insufficient horizontal bone with less than 3 mm prevents implant placement. Thus, ridge splitting is a treatment of choice, and this technique creates bone expansion to form a better receptor site for endosteal implants. A case report is presented involving a completely edentulous 52-year-old male patient presented to the clinic with a horizontal bone defect. The patient complained of having difficulty eating and wants to improve his smile. In this clinical case, a modified ridge-splitting technique was employed, differing from the conventional procedure that uses mallets, chisels, or osteotomes. A lancet and spatula were used for precise ridge splitting, followed by the placement of four endosseous tapered implants-two on each side (Dentis USA, La Palma, USA). Each implant had a diameter of 3.7 mm and a length of 10 mm. These implants were clinically placed in a single visit, with a torque of 30 N/cm² applied to ensure secure fixation. To accommodate the patient's unique maxillary bone anatomy, 25-degree angulated abutments were chosen for the four implants, ensuring a common path of insertion, and optimal angulation for long-term stability and aesthetics. Subsequently, a cemented provisional dental prosthesis restoration was fitted, and the patient reported satisfaction with both function and aesthetics. After a period of five months of osseointegration, the stability of the implants was assessed using a resonance frequency analyzer, yielding positive results. The average resonance frequency values for the maxillary left (canine and premolar) were ISQ 68 and ISQ 71, respectively, while for the maxillary right (lateral incisor and premolar), the values were ISQ 69 and ISQ 73. These readings indicate satisfactory implant stability following the osseointegration process. The postoperative cone-beam computed tomography (CBCT) showed gain to the bone width besides better function and good results concerning the esthetics. This report describes a modified ridge-splitting technique with a predictable and satisfactory outcome that fulfilled the patient's demands. The presented approach overcomes the disadvantages of two-staged implant placement bone grafting procedures and is also a more affordable option for the patient. CBCT evaluation confirmed bone gain with minimal morbidity after the procedure.
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Affiliation(s)
- Mohamed M Rahhal
- Restorative Dentistry, A.T. Still University, Kirksville, USA
- Prosthodontics, Fayoum University, Fayoum, EGY
| | - Rawda Awad
- Restorative Dentistry, A.T. Still University, Kirksville, USA
| | | | - Hamid Nurrohman
- Restorative Dentistry & Prosthodontics, University of Texas School of Dentistry, Houston, USA
| | - Carlos A Jurado
- Prosthodontics, University of Iowa College of Dentistry and Dental Clinic, Iowa City, USA
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Jurado CA, Karimi K, Kim R, Nurrohman H, Deemer E, LE C, French K, Tsujimoto A. Effects of over-the-counter at-home whitening products with LED light on surface roughness of partially- and fully crystalized CAD/CAM lithium disilicate ceramics. Dent Mater J 2023:2022-219. [PMID: 37225497 DOI: 10.4012/dmj.2022-219] [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] [Indexed: 05/26/2023]
Abstract
The aim of this study is to evaluate the effect of over-the-counter (OTC) at-home whitening products with LED light on partially- and fully-crystalized CAD/CAM lithium disilicate ceramics. Two partially-crystalized CAD/CAM lithium disilicate ceramics, Amber Mill and IPS e.max CAD, and one fully-crystalized CAD/CAM lithium disilicate ceramic, n!ce Straumann, were used. The specimens were divided based on treatment with OTC whitening products: no treatment provided, Colgate Optic, Crest 3D and Walgreens Deluxe. The surface roughness of the specimens was evaluated with an optical profilometer and scanning electron microscopy. The three LED whitening products significantly increased the surface roughness and changed surface morphology of Amber Mill and IPS e.max CAD but no differences for n!ce Straumann. OTC at-home whitening products with LED light can significantly increase the surface roughness of restorations fabricated with these partially-crystalized CAD/CAM lithium disilicate ceramic restorations. However, these products do not increase the surface roughness of restorations fabricated with this fully-crystalized lithium disilicate ceramic.
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Affiliation(s)
- Carlos A Jurado
- Department of Prosthodontics, University of Iowa College of Dentistry
| | - Kiarash Karimi
- Section of Restorative Dentistry, University of California Los Angeles School of Dentistry
| | - Reuben Kim
- Section of Restorative Dentistry, University of California Los Angeles School of Dentistry
| | - Hamid Nurrohman
- Department of Restorative Dentistry & Prosthodontics, University of Texas School of Dentistry at Houston
| | - Eva Deemer
- University of Texas at El Paso Center for Inland Desalination Systems
| | - Christine LE
- A. T. Still University Arizona School of Dentistry & Oral Health
| | - Kennedee French
- A. T. Still University Missouri School of Dentistry & Oral Health
| | - 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
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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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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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Garcia-Contreras R, Chavez-Granados PA, Jurado CA, Aranda-Herrera B, Afrashtehfar KI, Nurrohman H. Natural Bioactive Epigallocatechin-Gallate Promote Bond Strength and Differentiation of Odontoblast-like Cells. Biomimetics (Basel) 2023; 8:biomimetics8010075. [PMID: 36810406 PMCID: PMC9944806 DOI: 10.3390/biomimetics8010075] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Revised: 02/04/2023] [Accepted: 02/06/2023] [Indexed: 02/12/2023] Open
Abstract
The (-)-Epigallocatechin-gallate (EGCG) metabolite is a natural polyphenol derived from green tea and is associated with antioxidant, biocompatible, and anti-inflammatory effects. OBJECTIVE To evaluate the effects of EGCG to promote the odontoblast-like cells differentiated from human dental pulp stem cells (hDPSCs); the antimicrobial effects on Escherichia coli, Streptococcus mutans, and Staphylococcus aureus; and improve the adhesion on enamel and dentin by shear bond strength (SBS) and the adhesive remnant index (ARI). MATERIAL AND METHODS hDSPCs were isolated from pulp tissue and immunologically characterized. EEGC dose-response viability was calculated by MTT assay. Odontoblast-like cells were differentiated from hDPSCs and tested for mineral deposition activity by alizarin red, Von Kossa, and collagen/vimentin staining. Antimicrobial assays were performed in the microdilution test. Demineralization of enamel and dentin in teeth was performed, and the adhesion was conducted by incorporating EGCG in an adhesive system and testing with SBS-ARI. The data were analyzed with normalized Shapiro-Wilks test and ANOVA post hoc Tukey test. RESULTS The hDPSCs were positive to CD105, CD90, and vimentin and negative to CD34. EGCG (3.12 µg/mL) accelerated the differentiation of odontoblast-like cells. Streptococcus mutans exhibited the highest susceptibility < Staphylococcus aureus < Escherichia coli. EGCG increased (p < 0.05) the dentin adhesion, and cohesive failure was the most frequent. CONCLUSION (-)-Epigallocatechin-gallate is nontoxic, promotes differentiation into odontoblast-like cells, possesses an antibacterial effect, and increases dentin adhesion.
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Affiliation(s)
- Rene Garcia-Contreras
- Interdisciplinary Research Laboratory, Nanostructures, and Biomaterials Area, National School of Higher Studies (ENES) Leon, National Autonomous University of Mexico (UNAM), Leon 37684, Guanajuato, Mexico
| | - Patricia Alejandra Chavez-Granados
- Interdisciplinary Research Laboratory, Nanostructures, and Biomaterials Area, National School of Higher Studies (ENES) Leon, National Autonomous University of Mexico (UNAM), Leon 37684, Guanajuato, Mexico
| | - Carlos Alberto Jurado
- Department of Prosthodontics, The University of Iowa College of Dentistry and Dental Clinics, Iowa City, IA 52242, USA
- Correspondence: (C.A.J.); (H.N.)
| | - Benjamin Aranda-Herrera
- Interdisciplinary Research Laboratory, Nanostructures, and Biomaterials Area, National School of Higher Studies (ENES) Leon, National Autonomous University of Mexico (UNAM), Leon 37684, Guanajuato, Mexico
| | - Kelvin I. Afrashtehfar
- Clinical Sciences Department, College of Dentistry, Ajman University, Ajman City P.O. Box 346, United Arab Emirates
- Department of Reconstructive Dentistry & 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
- Correspondence: (C.A.J.); (H.N.)
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Argueta-Figueroa L, Jurado CA, Torres-Rosas R, Bautista-Hernández MA, Alhotan A, Nurrohman H. Clinical Efficacy of Biomimetic Bioactive Biomaterials for Dental Pulp Capping: A Systematic Review and Meta-Analysis. Biomimetics (Basel) 2022; 7:biomimetics7040211. [PMID: 36546911 PMCID: PMC9775437 DOI: 10.3390/biomimetics7040211] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Revised: 11/08/2022] [Accepted: 11/19/2022] [Indexed: 11/23/2022] Open
Abstract
Recently, biomimetic bioactive biomaterials have been introduced to the market for dental pulp capping. This systematic review and meta-analysis aimed to determine any variation between the effect of using TheraCal LC and other bioactive biomaterials for pulp capping is different, as measured by dentin increment and clinical success. The risk of bias was assessed using the Risk of Bias 2 and Newcastle−Ottawa tools for randomized clinical trials and observational studies. A search for relevant articles was performed on five databases. Additionally, the quality of the included studies was assessed using the Grading of Recommendations Assessment, Development, and Evaluation (GRADE) criteria. A summary of individual studies and a meta-analysis were performed. The odds ratio of data from clinical success was combined using a random-effects meta-analysis. The meta-analysis results showed homogeneity between the studies (I2 = 0%). They revealed that the clinical success showed no differences between the patients who received TheraCal LC, light-cured calcium silicate-based biomimetic biomaterial, for dental pulp capping or the comparator biomaterials (p > 0.5). However, the certainty of the evidence was low to moderate due to the risk of bias in the included studies.
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Affiliation(s)
- Liliana Argueta-Figueroa
- Tecnológico Nacional de México/Instituto Tecnológico de Toluca, Avenida Tecnológico s/n, Colonia Agrícola, Bellavista, La Virgen, Metepec 52149, Estado de México, Mexico
- Consejo Nacional de Ciencia y Tecnología (CONACYT), Av. Insurgentes Sur 1582 Col. Credito Constructor, Alcaldia Benito Juarez 03940, Estado de México, Mexico
| | - Carlos Alberto Jurado
- School of Dental Medicine, Texas Tech University Health Sciences Center, Woody L. Hunt School of Dental Medicine, 123 Rick Francis St, El Paso, TX 79905, USA
- Correspondence: (C.A.J.); (H.N.)
| | - Rafael Torres-Rosas
- Centro de Estudios en Ciencias de la Salud y la Enfermedad, Facultad de Odontología, Universidad Autónoma “Benito Juárez” de Oaxaca, Av. Universidad s/n, Ex-Hacienda de Cinco Señores, Oaxaca 65120, Oaxaca, Mexico
| | - Mario Alberto Bautista-Hernández
- Facultad de Medicina, Universidad Autónoma “Benito Juárez” de Oaxaca, Ex Hacienda de Aguilera s/n, Calz. San Felipe del Agua, Oaxaca de Juárez 68120, Oaxaca, Mexico
| | - Abdulaziz Alhotan
- Dental Health Department, College of Applied Medical Sciences, King Saud University, Riyadh 11454, Saudi Arabia
| | - Hamid Nurrohman
- Missouri School of Dentistry & Oral Health, A. T. Still University, Kirskville, MO 63501, USA
- Correspondence: (C.A.J.); (H.N.)
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Alshehri A, Alhalabi F, Mustafa M, Awad MM, Alqhtani M, Almutairi M, Alhijab F, Jurado CA, Fischer NG, Nurrohman H, Alshabib A. Effects of Accelerated Aging on Color Stability and Surface Roughness of a Biomimetic Composite: An In Vitro Study. Biomimetics (Basel) 2022; 7:biomimetics7040158. [PMID: 36278715 PMCID: PMC9624352 DOI: 10.3390/biomimetics7040158] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Revised: 09/30/2022] [Accepted: 10/01/2022] [Indexed: 11/18/2022] Open
Abstract
The aim of this in vitro study is to compare the color stability and surface roughness of conventional and self-blending resin composites before and after staining and aging. Three conventional composites (Filtek Z350, IPS Empress Direct, and Estalite Palfique LX5) and one self-blending (Omnichroma) resin composite were used in this study. Sixty discs were prepared and polymerized in a metal mold (n = 15 per group). Samples were then finished and polished by Layan discs. Color testing and roughness testing were measured as a baseline (T0) by a spectrophotometer and profilometry. Samples were then stained with tea for 24 h, water aged for 30 days, and then a second reading (T1) was performed. Finishing and polishing were performed again, and a third reading (T2) was collected. All groups showed significant decrease in all color parameters (L*, a*, and b*); however, after polishing, all groups showed color enhancements matching pre-experiment baseline colors in all color parameters (L*, a*, and b*), except for Estelite Palfique LX5, which showed a significant difference in L relative to the baseline. Furthermore, Estalite Palfique LX5 showed increased roughness after staining compared to the baseline, unlike other groups. No significant differences in color stability were found between self-blending composites and other composite materials. Accelerated aging and staining had minimal effects on the surface roughness of self-blending composite.
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Affiliation(s)
- Abdullah Alshehri
- Department of Conservative Dental Sciences, College of Dentistry, Prince Sattam Bin Abdulaziz University, Al-Kharj 11942, Saudi Arabia
- Correspondence: (A.A.); (A.A.)
| | - Feras Alhalabi
- Department of Conservative Dental Sciences, College of Dentistry, Prince Sattam Bin Abdulaziz University, Al-Kharj 11942, Saudi Arabia
| | - Mohammed Mustafa
- Department of Conservative Dental Sciences, College of Dentistry, Prince Sattam Bin Abdulaziz University, Al-Kharj 11942, Saudi Arabia
| | - Mohamed M. Awad
- Department of Conservative Dental Sciences, College of Dentistry, Prince Sattam Bin Abdulaziz University, Al-Kharj 11942, Saudi Arabia
| | - Mohammed Alqhtani
- Dental Intern, College of Dentistry, Prince Sattam Bin Abdulaziz University, Al-Kharj 11942, Saudi Arabia
| | - Mohammed Almutairi
- Dental Intern, College of Dentistry, Prince Sattam Bin Abdulaziz University, Al-Kharj 11942, Saudi Arabia
| | - Faisal Alhijab
- Dental Intern, College of Dentistry, Prince Sattam Bin Abdulaziz University, Al-Kharj 11942, Saudi Arabia
| | - Carlos A. Jurado
- Woody L. Hunt School of Dental Medicine, Texas Tech University Health Sciences Center, El Paso, TX 79905, USA
| | - Nicholas G. Fischer
- Minnesota Dental Research Center for Biomaterials and Biomechanics, University of Minnesota School of Dentistry, Minneapolis, MN 55455, USA
| | - Hamid Nurrohman
- Restorative Dentistry, A. T. Still University Missouri School of Dentistry & Oral Health, Kirskville, MO 63501, USA
| | - Abdulrahman Alshabib
- Department of Restorative Dentistry, King Saud University College of Dentistry, Riyadh 11545, Saudi Arabia
- Engr Abdullah Bugshan Research Chair for Dental and Oral Rehabilitation, King Saud University, Riyadh 11545, Saudi Arabia
- Correspondence: (A.A.); (A.A.)
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Jurado CA, Amarillas-Gastelum C, Tsujimoto A, Alresayes S, French K, Nurrohman H. Light Transmission for a Novel Chairside CAD/CAM Lithium Disilicate Ceramic. J Contemp Dent Pract 2021; 22:1365-1369. [PMID: 35656672] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
AIM To evaluate light transmission in a novel chairside CAD/CAM lithium disilicate ceramic with different thicknesses and with and without polishing. MATERIALS AND METHODS Sixty flat samples (10 specimens/group) were fabricated from novel chairside CAD/CAM lithium disilicate ceramic blocks (Amber Mill, Hass Bio) with different thicknesses and with and without polishing as follows: (1) 1.0 mm thickness without polishing (1.0NoP); (2) 1.0 mm thickness with polishing (1.0Po); (3) 1.5 mm thickness without polishing (1.5NoP); (4) 1.5 mm thickness with polishing (1.5Po); (5) 2.0 mm thickness without polishing (2.0NoP); and (6) 2.0 mm thickness with polishing (2.0Po). Specimens were polished with a polishing system for lithium disilicate restorations following the manufacturer's recommendations. Light transmission was evaluated with a curing radiometer. Obtained data were subjected to two-way ANOVA followed by Tukey's post hoc tests (α = 0.05). SEM observations were conducted to evaluate surface microstructure. RESULTS The light intensity through the lithium disilicate blocks with and without polishing was 200.9 mW/cm2 (16.1%) and 194.4 mW/cm2 (15.6%) for 1.0 mm specimens, 119.3 mW/cm2 (9.5%) and 111.9 mW/cm2 (9.0%) for 1.5 mm specimens, and 102.3 mW/cm2 (8.2%) and 96.0 mW/cm2 (7.7%) for 2.0 mm specimens. SEM images showed a smoother surface with polishing compared to nonpolished specimens. CONCLUSION The thickness and polishing of the restorations were both significant influential factors in light transmission. CLINICAL SIGNIFICANCE The range of light transmission percentage through the novel chairside CAD/CAM lithium disilicate blocks was 7.7-16.1%, suggesting that light attenuation through the material may influence the polymerization reaction of resin luting cement in the bonding process.
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Affiliation(s)
- Carlos A Jurado
- Texas Tech University Health Sciences Center El Paso, School of Dental Medicine, El Paso, Texas, United States of America
| | - Clarisa Amarillas-Gastelum
- Department of General Dentistry, Stony Brook University School of Dental Medicine, Stony Brook, New York, United States of America
| | - Akimasa Tsujimoto
- Department of Operative Dentistry, University of Iowa College of Dentistry, Iowa City, Iowa, United States of America
| | - Saad Alresayes
- Department of Prosthetic Dental Sciences, King Saud University College of Dentistry, Riyadh, Saudi Arabia
| | - Kennedee French
- AT Still University-Missouri School of Dentistry and Oral Health, Kirksville, Missouri, United States of America
| | - Hamid Nurrohman
- AT Still University-Missouri School of Dentistry and Oral Health, Kirksville, Missouri, United States of America; Department of Preventive and Restorative Dental Sciences, University of California San Francisco, San Francisco, California, United States of America, Phone: +16606262882, e-mail:
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Babaie E, Bacino M, White J, Nurrohman H, Marshall GW, Saeki K, Habelitz S. Polymer-Induced Liquid Precursor (PILP) remineralization of artificial and natural dentin carious lesions evaluated by nanoindentation and microcomputed tomography. J Dent 2021; 109:103659. [PMID: 33836248 DOI: 10.1016/j.jdent.2021.103659] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [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: 12/19/2020] [Revised: 03/26/2021] [Accepted: 04/02/2021] [Indexed: 11/28/2022] Open
Abstract
OBJECTIVES The study evaluates the efficacy to remineralize artificial and natural dentin lesions through restorative dental procedures that include the Polymer-Induced Liquid Precursor (PILP) method comprising polyaspartic acid (pAsp). METHODS Novel ionomeric cement compositions based on bioglass 45S5 and pAsp mixtures, as well as conditioning solutions (conditioner) containing 5 mg/mL pAsp, were developed and tested on demineralized dentin blocks (3-4 mm thick) on shallow and deep lesions with the thickness of 140 μm ± 50 and 700 μm ± 50, respectively. In the first treatment group, 20 μL of conditioner was applied to demineralized shallow (n = 3) and deep (n = 3) lesion specimens for 20 s before restoration with glass ionomer cement (RMGIC). For the PILP cement treatment group, cement was applied onto the wet surface of the demineralized specimen for both shallow (n = 3) and deep (n = 3) artificial lesions after the application of the conditioner and before the final restoration. Sample groups were compared to RMGIC restoration, for both shallow and deep lesions (n = 3 each) and treatments in PILP-solution (n = 3 for deep lesions) without restoration for 4 weeks. All of the restored specimens were immersed in simulated body fluid (SBF) solution for 2 weeks and 4 weeks for shallow and deep lesions respectively to allow for remineralization. The artificial lesion specimens were evaluated for changes in the nanomechanical profile (E-modulus and hardness) using nanoindentation. Shallow lesions were analyzed by SEM under vacuum for changes in morphology caused by PILP treatments. Also, a pilot study on human third molars with moderate lesions in dentin (n = 3) was initiated to test the efficacy of treatments in natural lesions based on mineral densities using microcomputed tomography (μCT) at 0, 1, and 3 months. RESULTS This study showed that functional remineralization of artificial lesions using PILP-releasing restoratives occurred, indicated by an increase of the elastic modulus in shallow lesions and in the middle zone of deep artificial lesions. The mechanical improvement was significant when compared to RMGIC restoration without pAsp (P < 0.05). Nonetheless, recovery across artificial lesions was most significant when specimens were immersed into PILP-solution with restorative (P < 0.01). Furthermore, natural lesions increased in mineral volume content to a higher degree when the restorative treatment included the PILP-method (P < 0.05). However, none of the natural lesions recovered to full mineral degree regardless of the treatments. CLINICAL SIGNIFICANCE/CONCLUSION These findings indicate the benefit of PILP applications in the functional repair of dentin caries and illustrate the challenge to integrate the PILP-method into a restorative approach in minimally invasive dental procedures.
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Affiliation(s)
- Elham Babaie
- Department of Preventative and Restorative Dental Sciences, UCSF School of Dentistry, San Francisco, CA, USA
| | - Margôt Bacino
- Department of Preventative and Restorative Dental Sciences, UCSF School of Dentistry, San Francisco, CA, USA
| | - Joel White
- Department of Preventative and Restorative Dental Sciences, UCSF School of Dentistry, San Francisco, CA, USA
| | - Hamid Nurrohman
- Department of Preventative and Restorative Dental Sciences, UCSF School of Dentistry, San Francisco, CA, USA; Missouri School of Dentistry and Oral Health, A.T. Still University, Kirksville, MO, USA
| | - Grayson W Marshall
- Department of Preventative and Restorative Dental Sciences, UCSF School of Dentistry, San Francisco, CA, USA
| | - Kuniko Saeki
- Department of Preventative and Restorative Dental Sciences, UCSF School of Dentistry, San Francisco, CA, USA
| | - Stefan Habelitz
- Department of Preventative and Restorative Dental Sciences, UCSF School of Dentistry, San Francisco, CA, USA.
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Omar H, Davis J, Nurrohman H. Real-time collaborative question-making activity to enhance students' knowledge of evidence-based dentistry. J Dent Educ 2020; 85:952-954. [PMID: 33103240 DOI: 10.1002/jdd.12474] [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: 09/21/2020] [Revised: 10/10/2020] [Accepted: 10/16/2020] [Indexed: 11/12/2022]
Affiliation(s)
- Hanan Omar
- Restorative Dentistry, Missouri School of Dentistry and Oral Health, A.T. Still University, Kirksville, Missouri, USA
| | - Joan Davis
- Research, Missouri School of Dentistry and Oral Health, A.T. Still University, Kirksville, Missouri, USA
| | - Hamid Nurrohman
- Restorative Dentistry, Missouri School of Dentistry and Oral Health, A.T. Still University, Kirksville, Missouri, USA
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Musawi A, Barrett T, Nurrohman H, Bhatia S, Smith K. Assessing likelihood of using the Bruininks-Oseretsky test of motor proficiency to predict preclinical performance of dental students. Clin Exp Dent Res 2019; 5:513-518. [PMID: 31687185 PMCID: PMC6820805 DOI: 10.1002/cre2.217] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2019] [Revised: 06/12/2019] [Accepted: 06/13/2019] [Indexed: 12/04/2022] Open
Abstract
Objective The acquisition of motor skills is a key competency for the practice of dentistry, and innate abilities have been shown to influence motor performance. Thus, finding the most efficient manual dexterity tests may predict performance of dental students. The current study used the Bruininks-Oseretsky Test of Motor Proficiency, to assess motor skills of first year (D1) and second year (D2) dental students. Materials and methods Three fine motor subsets of the BOT-2-fine motor precision, fine motor integration, and manual dexterity-were administered to D1 and D2 dental students in 2017 and 2018. The BOT-2 subset scores of D1 students were compared with those of D2 students, who had preclinical dental experiences. For D2 students, we tested for correlations between BOT-2 subset scores and performance scores in a preclinical operative dentistry course. Results No differences were found between D1 and D2 students for any BOT-2 subtest scores (all Ps > .09). No correlations were found between total scores of each BOT-2 subtest and the operative dentistry course for D2 students (all Ps > .20). Conclusions Our results suggested the BOT-2 was not predictive of manual skills of dental applicants or preclinical dental students. Although we assumed students would perform well with instruction, practice, and feedback, we were unable to determine whether innate abilities influenced acquisition of manual dexterity skills. More research about the acquisition of technical clinical skills in dentistry is required.
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Affiliation(s)
- Ammar Musawi
- Missouri School of Dentistry and Oral HealthA.T. Still UniversityKirksvilleMissouri
| | - Travis Barrett
- Missouri School of Dentistry and Oral HealthA.T. Still UniversityKirksvilleMissouri
| | - Hamid Nurrohman
- Missouri School of Dentistry and Oral HealthA.T. Still UniversityKirksvilleMissouri
| | - Shalini Bhatia
- Department of Research SupportA.T. Still UniversityKirksvilleMissouri
| | - Kneka Smith
- Missouri School of Dentistry and Oral HealthA.T. Still UniversityKirksvilleMissouri
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Bacino M, Girn V, Nurrohman H, Saeki K, Marshall SJ, Gower L, Saeed E, Stewart R, Le T, Marshall GW, Habelitz S. Integrating the PILP-mineralization process into a restorative dental treatment. Dent Mater 2018; 35:53-63. [PMID: 30545611 DOI: 10.1016/j.dental.2018.11.030] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [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: 08/15/2018] [Revised: 11/27/2018] [Accepted: 11/27/2018] [Indexed: 11/26/2022]
Abstract
The addition of charged polymers, like poly-aspartic acid (pAsp), to mineralizing solutions allows for transport of calcium and phosphate ions into the lumen of collagen fibrils and subsequent crystallization of oriented apatite crystals by the so-called Polymer-Induced Liquid Precursor (PILP) mineralization process, leading to the functional recovery of artificial dentin lesions by intrafibrillar mineralization of collagen. OBJECTIVE To evaluate the feasibility of applying the PILP method as part of a restorative treatment and test for effectiveness to functionally remineralize artificial lesions in dentin. MATERIALS AND METHODS Two methods of providing pAsp to standardized artificial lesions during a restorative procedure were applied: (A) pAsp was mixed into commercial RMGI (resin modified glass ionomer) cement formulations and (B) pAsp was added at high concentration (25mg/ml) in solution to rehydrate lesions before restoring with a RMGI cement. All specimens were immersed in simulated body fluid for two weeks to allow for remineralization and then analyzed for dehydration shrinkage, integrity of cement-dentin interface, degree of mineralization, and changes in the nanomechanical profile (E-modulus) across the lesion. RESULTS After the remineralization treatment, lesion shrinkage was significantly reduced for all treatment groups compared to demineralized samples. Pores developed in RMGI when pAsp was added. A thin layer at the dentin-cement interface, rich in polymer formed possibly from a reaction between pAsp and the RMGI. When analyzed by SEM under vacuum, most lesions delaminated from the cement interface. EDS-analysis showed some but not full recovery of calcium and phosphorous levels for treatment groups that involved pAsp. Nanoindentations placed across the interface indicated improvement for RMGI containing 40% pAsp, and were significantly elevated when lesions were rehydrated with pAsp before being restored with RMGI. In particular the most demineralized outer zone recovered substantially in the elastic modulus, suggesting that functional remineralization has been initiated by pAsp delivery upon rehydration of air-dried demineralized dentin. In contrast, the effectiveness of the RMGI on functional remineralization of dentin was minimal when pAsp was absent. SIGNIFICANCE Incorporation of pAsp into restorative treatments using RMGIs promises to be a feasible way to induce the PILP-mineralization process in a clinical setting and to repair the structure and properties of dentin damaged by the caries process.
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Affiliation(s)
- Margot Bacino
- Department of Preventative and Restorative Dental Sciences, UCSF School of Dentistry, San Francisco, CA, USA
| | - Vishavjeet Girn
- Department of Orofacial Sciences, Division of Pediatric Dentistry, University of California San Francisco, San Francisco, CA, USA
| | - Hamid Nurrohman
- Department of Preventative and Restorative Dental Sciences, UCSF School of Dentistry, San Francisco, CA, USA; Missouri School of Dentistry and Oral Health, A.T. Still University, Kirksville, MO, USA
| | - Kuniko Saeki
- Department of Preventative and Restorative Dental Sciences, UCSF School of Dentistry, San Francisco, CA, USA
| | - Sally J Marshall
- Department of Preventative and Restorative Dental Sciences, UCSF School of Dentistry, San Francisco, CA, USA
| | - Laurie Gower
- Department of Materials Science and Engineering, University of Florida, Gainesville, FL, USA
| | - Ella Saeed
- Department of Preventative and Restorative Dental Sciences, UCSF School of Dentistry, San Francisco, CA, USA
| | - Ray Stewart
- Department of Orofacial Sciences, Division of Pediatric Dentistry, University of California San Francisco, San Francisco, CA, USA
| | - Thuan Le
- Department of Orofacial Sciences, Division of Pediatric Dentistry, University of California San Francisco, San Francisco, CA, USA
| | - Grayson W Marshall
- Department of Preventative and Restorative Dental Sciences, UCSF School of Dentistry, San Francisco, CA, USA
| | - Stefan Habelitz
- Department of Preventative and Restorative Dental Sciences, UCSF School of Dentistry, San Francisco, CA, USA.
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Saxena N, Cremer MA, Dolling ES, Nurrohman H, Habelitz S, Marshall GW, Gower LB. Influence of fluoride on the mineralization of collagen via the polymer-induced liquid-precursor (PILP) process. Dent Mater 2018; 34:1378-1390. [PMID: 29935767 PMCID: PMC6389359 DOI: 10.1016/j.dental.2018.06.020] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2018] [Revised: 06/07/2018] [Accepted: 06/07/2018] [Indexed: 11/15/2022]
Abstract
OBJECTIVE The polymer-induced liquid-precursor (PILP) mineralization process has been shown to remineralize artificial dentin lesions to levels consistent with those of native dentin. However, nanoindentation revealed that the moduli of those remineralized lesions were only ∼50% that of native dentin. We hypothesize that this may be due to the PILP process having been previously optimized to obtain high amounts (∼70wt%) of intrafibrillar crystals, but without sufficient interfibrillar mineral, another significant component of dentin. METHODS Fluoride was added to the PILP-mineralization of collagen from rat tail tendon at varying concentrations to determine if a better balance of intra- versus inter-fibrillar mineralization could be obtained, as determined by electron microscopy. Nanoindentation was used to determine if fluoridated apatite could improve the mechanical properties of the composites. RESULTS Fluoride was successfully incorporated into the PILP-mineralization of rat tail tendon and resulted in collagen-mineral composite systems with the mineral phase of hydroxyapatite containing various levels of fluoridation. As the fluoride concentration increased, the crystals became larger and more rod-like, with an increasing tendency to form on the fibril surfaces rather than the interior. Nanomechanical testing of the mineralized tendons revealed that fluoride addition did not increase modulus over PILP mineralization alone. This likely resulted from the separated nature of collagen fibrils that comprise tendon, which does not provide lateral reinforcement and therefore may not be suited for the compressive loads of nanoindentation. SIGNIFICANCE This work contributes to the development of minimally invasive approaches to caries treatment by determining if collagen can be functionally mineralized.
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Affiliation(s)
- Neha Saxena
- Materials Science and Engineering, University of Florida, 549 Gale Lemerand Dr., Gainesville, FL 32611, USA
| | - Maegan A Cremer
- Materials Science and Engineering, University of Florida, 549 Gale Lemerand Dr., Gainesville, FL 32611, USA
| | - Evan S Dolling
- Materials Science and Engineering, University of Florida, 549 Gale Lemerand Dr., Gainesville, FL 32611, USA
| | - Hamid Nurrohman
- Preventative and Restorative Dental Sciences, University of California San Francisco, 707 Parnassus Ave., San Francisco, CA 94143, USA; Missouri School of Dentistry and Oral Health, A.T. Still University, 800 West Jefferson St., Kirksville, MO 63501, USA
| | - Stefan Habelitz
- Preventative and Restorative Dental Sciences, University of California San Francisco, 707 Parnassus Ave., San Francisco, CA 94143, USA
| | - Grayson W Marshall
- Preventative and Restorative Dental Sciences, University of California San Francisco, 707 Parnassus Ave., San Francisco, CA 94143, USA
| | - Laurie B Gower
- Materials Science and Engineering, University of Florida, 549 Gale Lemerand Dr., Gainesville, FL 32611, USA.
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Nurrohman H, Carneiro KMM, Hellgeth J, Saeki K, Marshall SJ, Marshall GW, Habelitz S. The role of protease inhibitors on the remineralization of demineralized dentin using the PILP method. PLoS One 2017; 12:e0188277. [PMID: 29182665 PMCID: PMC5705123 DOI: 10.1371/journal.pone.0188277] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2017] [Accepted: 11/04/2017] [Indexed: 02/01/2023] Open
Abstract
Mineralized and sound dentin matrices contain inactive preforms of proteolytic enzymes that may be activated during the demineralization cycle. In this study, we tested the hypothesis that protease inhibitors (PI) preserve demineralized collagen fibrils and other constituents of the dentin matrix and thereby affect the potential for remineralization. Artificial carious lesions with lesion depths of 140 μm were created with acetate buffer (pH = 5.0, 66 hours), and remineralized using a polymer-induced-liquid-precursor (PILP) process (pH = 7.4, 14 days) containing poly(aspartic acid) (pAsp) as the process-directing agent. De- and remineralizing procedures were performed in the presence or absence of PI. Ultrastructure and mechanical recovery of demineralized dentin following PILP remineralization were examined and measured in water with atomic force microscopy (AFM) and nanoindentation. Nanomechanical properties of hydrated artificial lesions had a low elastic modulus (ER <0.4 GPa) extending about 100 μm into the lesion, followed by a sloped region of about 140 μm depth where values reached those of normal dentin (18.0–20.0 GPa). Mapping of mineral content by both micro-FTIR and micro x-ray computed tomography correlated well with modulus profiles obtained by nanoindentation. Tissue demineralized in the presence of PI exhibited higher elastic moduli (average 2.8 GPa) across the lesion and comprised a narrow zone in the outer lesion with strongly increased modulus (up to 8 GPa; p < 0.05), which might be related to the preservation of non-collagenous proteins that appear to induce calcium phosphate mineral formation even under demineralizing physical-chemical conditions. However, mechanical aspects of remineralization through the elastic modulus change, and the micromorphological aspects with SEM and TEM observation were almost identical with PILP treatments being conducted in the presence or absence of PI. Thus, the application of the protease inhibitors (PI) seemed to be less effective in promoting the remineralization of demineralized dentin.
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Affiliation(s)
- Hamid Nurrohman
- Department of Preventive and Restorative Dental Sciences, University of California, San Francisco, San Francisco, CA, United States of America
- Missouri School of Dentistry and Oral Health, A.T. Still University, Kirksville, Missouri, United States of America
| | - Karina M. M. Carneiro
- Department of Preventive and Restorative Dental Sciences, University of California, San Francisco, San Francisco, CA, United States of America
- Faculty of Dentistry, University of Toronto, Toronto, Ontario, Canada
| | - John Hellgeth
- Thermo Fisher Scientific, San Jose, CA, United States of America
| | - Kuniko Saeki
- Department of Preventive and Restorative Dental Sciences, University of California, San Francisco, San Francisco, CA, United States of America
| | - Sally J. Marshall
- Department of Preventive and Restorative Dental Sciences, University of California, San Francisco, San Francisco, CA, United States of America
| | - Grayson W. Marshall
- Department of Preventive and Restorative Dental Sciences, University of California, San Francisco, San Francisco, CA, United States of America
- * E-mail: (GWM); (SH)
| | - Stefan Habelitz
- Department of Preventive and Restorative Dental Sciences, University of California, San Francisco, San Francisco, CA, United States of America
- * E-mail: (GWM); (SH)
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Nurrohman H, F AHE. MODEL TOLERANSI DAN KERUKUNAN DALAM PLURALITAS KEHIDUPAN BERAGAMA (Interaksi Sosial Keagamaan antar Umat Islam dan Kristiani di Desa Sindang Jaya Kecamatan Ciranjang, Cianjur). Al-Tsaqafa 2017; 14:1-36. [DOI: 10.15575/al-tsaqafa.v14i1.1788] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
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Nurrohman H, Saeki K, Carneiro K, Chien Y, Djomehri S, Ho S, Qin C, Marshall S, Gower L, Marshall G, Habelitz S. Repair of dentin defects from DSPP knockout mice by PILP mineralization. J Mater Res 2016; 31:321-327. [PMID: 27239097 PMCID: PMC4884014 DOI: 10.1557/jmr.2015.406] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Dentinogenesis imperfecta type II (DGI-II) lacks intrafibrillar mineral with severe compromise of dentin mechanical properties. A Dspp knockout (Dspp-/-) mouse, with a phenotype similar to that of human DGI-II, was used to determine if poly-L-aspartic acid [poly(ASP)] in the "polymer-induced liquid-precursor" (PILP) system can restore its mechanical properties. Dentin from six-week old Dspp-/- and wild-type mice was treated with CaP solution containing poly(ASP) for up to 14 days. Elastic modulus and hardness before and after treatment were correlated with mineralization from Micro x-ray computed tomography (Micro-XCT). Transmission electron microscopy (TEM)/Selected area electron diffraction (SAED) were used to compare matrix mineralization and crystallography. Mechanical properties of the Dspp-/- dentin were significantly less than wild-type dentin and recovered significantly (P < 0.05) after PILP-treatment, reaching values comparable to wild-type dentin. Micro-XCT showed mineral recovery similar to wild-type dentin after PILP-treatment. TEM/SAED showed repair of patchy mineralization and complete mineralization of defective dentin. This approach may lead to new strategies for hard tissue repair.
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Affiliation(s)
- H. Nurrohman
- Department of Preventive and Restorative Dental Sciences, University of California, San Francisco, San Francisco, California 94143, USA
| | - K. Saeki
- Department of Preventive and Restorative Dental Sciences, University of California, San Francisco, San Francisco, California 94143, USA
| | - K. Carneiro
- Department of Preventive and Restorative Dental Sciences, University of California, San Francisco, San Francisco, California 94143, USA
| | - Y.C. Chien
- Department of Preventive and Restorative Dental Sciences, University of California, San Francisco, San Francisco, California 94143, USA
| | - S. Djomehri
- Department of Preventive and Restorative Dental Sciences, University of California, San Francisco, San Francisco, California 94143, USA
| | - S.P. Ho
- Department of Preventive and Restorative Dental Sciences, University of California, San Francisco, San Francisco, California 94143, USA
| | - C. Qin
- Department of Biomedical Sciences and Center for Craniofacial Research and Diagnosis, Texas A&M University Baylor College of Dentistry, Dallas, Texas 75246, USA
| | - S.J. Marshall
- Department of Preventive and Restorative Dental Sciences, University of California, San Francisco, San Francisco, California 94143, USA
| | - L.B. Gower
- Department of Materials Science & Engineering, University of Florida, Gainesville, Florida 32611, USA
| | - G.W. Marshall
- Department of Preventive and Restorative Dental Sciences, University of California, San Francisco, San Francisco, California 94143, USA
| | - S. Habelitz
- Department of Preventive and Restorative Dental Sciences, University of California, San Francisco, San Francisco, California 94143, USA
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Francescantonio MD, Nurrohman H, Takagaki T, Nikaido T, Tagami J, Giannini M. Sodium hypochlorite effects on dentin bond strength and acid-base resistant zone formation by adhesive systems. Braz J Oral Sci 2015. [DOI: 10.1590/1677-3225v14n4a15] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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Nikaido T, Nurrohman H, Takagaki T, Sadr A, Ichinose S, Tagami J. Nanoleakage in Hybrid Layer and Acid-Base Resistant Zone at the Adhesive/Dentin Interface. Microsc Microanal 2015; 21:1271-1277. [PMID: 26350420 DOI: 10.1017/s1431927615015068] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The aim of interfacial nanoleakage evaluation is to gain a better understanding of degradation of the adhesive-dentin interface. The acid-base resistant zone (ABRZ) is recognized at the bonded interface under the hybrid layer (HL) in self-etch adhesive systems after an acid-base challenge. The purpose of this study was to evaluate nanoleakage in HL and ABRZ using three self-etch adhesives; Clearfil SE Bond (SEB), Clearfil SE One (SEO), and G-Bond Plus (GBP). One of the three adhesives was applied on the ground dentin surface and light cured. The specimens were longitudinally divided into two halves. One half remained as the control group. The others were immersed in ammoniacal silver nitrate solution, followed by photo developing solution under fluorescent light. Following this, the specimens were subjected to acid-base challenges with an artificial demineralization solution (pH4.5) and sodium hypochlorite, and prepared in accordance with common procedures for transmission electron microscopy (TEM) examination. The TEM images revealed silver depositions in HL and ABRZ due to nanoleakage in all the adhesives; however, the extent of nanoleakage was material dependent. Funnel-shaped erosion beneath the ABRZ was observed only in the all-in-one adhesive systems; SEO and GBP, but not in the two-step self-etch adhesive system; SEB.
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Affiliation(s)
- Toru Nikaido
- 1Department of Cariology and Operative Dentistry,Division of Oral Health Sciences,Graduate School of Medical and Dental Sciences,Tokyo Medical and Dental University (TMDU),1-5-45,Yushima,Bunkyo-ku,Tokyo 113-8549,Japan
| | - Hamid Nurrohman
- 2Department of Preventive and Restorative Dental Sciences,University of California,Box 0758,707 Parnassus Ave.,San Francisco,CA 94143-0758,USA
| | - Tomohiro Takagaki
- 1Department of Cariology and Operative Dentistry,Division of Oral Health Sciences,Graduate School of Medical and Dental Sciences,Tokyo Medical and Dental University (TMDU),1-5-45,Yushima,Bunkyo-ku,Tokyo 113-8549,Japan
| | - Alireza Sadr
- 3Biomimetics Biomaterials Biophotonics & Technology Laboratory,Department of Restorative Dentistry,University of Washington School of Dentistry;1959 NE Pacific St.,Box 357456,Seattle,WA 98195-7456,USA
| | - Shizuko Ichinose
- 4Instrumental Analysis Research Center,Tokyo Medical and Dental University (TMDU);1-5-45,Yushima,Bunkyo-ku,Tokyo 113-8549,Japan
| | - Junji Tagami
- 1Department of Cariology and Operative Dentistry,Division of Oral Health Sciences,Graduate School of Medical and Dental Sciences,Tokyo Medical and Dental University (TMDU),1-5-45,Yushima,Bunkyo-ku,Tokyo 113-8549,Japan
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Nurrohman H, Nakashima S, Takagaki T, Sadr A, Nikaido T, Asakawa Y, Uo M, Marshall SJ, Tagami J. Immobilization of phosphate monomers on collagen induces biomimetic mineralization. Biomed Mater Eng 2015; 25:89-99. [DOI: 10.3233/bme-141243] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- Hamid Nurrohman
- Cariology and Operative Dentistry, Department of Oral Health Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
- Department of Preventive and Restorative Dental Sciences, University of California, San Francisco, San Francisco, CA, USA
| | - Syozi Nakashima
- Cariology and Operative Dentistry, Department of Oral Health Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Tomohiro Takagaki
- Cariology and Operative Dentistry, Department of Oral Health Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Alireza Sadr
- Cariology and Operative Dentistry, Department of Oral Health Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Toru Nikaido
- Cariology and Operative Dentistry, Department of Oral Health Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Yuya Asakawa
- Advanced Biomaterials, Department of Oral Health Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Motohiro Uo
- Advanced Biomaterials, Department of Oral Health Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Sally J. Marshall
- Department of Preventive and Restorative Dental Sciences, University of California, San Francisco, San Francisco, CA, USA
| | - Junji Tagami
- Cariology and Operative Dentistry, Department of Oral Health Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
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Nurrohman H, Nikaido T, Takagaki T, Sadr A, Ichinose S, Tagami J. Apatite crystal protection against acid-attack beneath resin-dentin interface with four adhesives: TEM and crystallography evidence. Dent Mater 2012; 28:e89-98. [PMID: 22572538 DOI: 10.1016/j.dental.2012.04.025] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [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: 12/19/2011] [Revised: 03/08/2012] [Accepted: 04/16/2012] [Indexed: 11/19/2022]
Abstract
OBJECTIVES Interaction between specific functional groups and apatite crystals may contribute to adhesion. The present study investigated effects of four adhesives with different compositions on protection of crystals beneath the hybrid layer against acid-attack using transmission electron microscopy (TEM) and selected area electron diffraction (SAED). METHODS Human dentin was bonded with four adhesives; two with a carboxylic-based functional co-polymer (PAA): three-step etch-and-rinse Scotchbond Multi-Purpose (SMP, 3M ESPE) and one-step self-etch Adper Easy Bond (AEB, 3M ESPE), and two with a phosphate-based functional monomer (MDP): two-step etch-and-rinse Clearfil Photo Bond (CPB, Kuraray Medical) and two-step self-etch Clearfil SE Bond (CSE, Kuraray Medical). The specimens were the either left untreated (control) or subjected to acid-base challenge with demineralizing solution (pH 4.5) and 5% NaClO. All specimens were processed and observed by TEM. SAED was used to identify the presence or absence of apatite crystallites at the base or beneath hybrid layer before and after acid-base challenge. RESULTS An apatite-rich zone was observed beneath the partially demineralized hybrid layer of CSE. The zone was thinner in AEB, but a demineralization-susceptible area was found beneath it. The etch-and-rinse adhesives (SMP and CPB) demonstrated completely or predominantly demineralized hybrid layers, which were devoid of the acid-resistant apatite-rich zone. SIGNIFICANCE TEM/SAED evidence disclosed that the preserved dentin apatite crystals beneath the thin hybrid layer of the mild self-etch adhesives were protected against acid. Diffusion of reactive components beyond the hybrid layer, and their chemical bonding potential with the remaining crystals created the acid-base resistant zone.
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Affiliation(s)
- Hamid Nurrohman
- Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Yushima, Bunkyo-ku, Tokyo, Japan
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Nurrohman H, Nikaido T, Takagaki T, Sadr A, Waidyasekera K, Kitayama S, Ikeda M, Tagami J. Dentin bonding performance and ability of four MMA-based adhesive resins to prevent demineralization along the hybrid layer. J Adhes Dent 2012; 14:339-48. [PMID: 22282759 DOI: 10.3290/j.jad.a22764] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
PURPOSE To evaluate the tensile bond durability and ability of four MMA-based adhesive resins to prevent demineralization along the hybrid layer when exposed to a demineralizing solution. MATERIALS AND METHODS A PMMA rod was bonded to human dentin using one of four MMA-based adhesive systems: Super-Bond C&B (SB), SBP-40TX (SBP, experimental), M-Bond (MB), and M-Bond II (MB II). Bonded specimens were sectioned into 0.9 mm x 0.9 mm beams and subjected to microtensile bond strength (µTBS) testing after water storage at 37°C for 24 h or 10,000 thermal cycles. Data were analyzed with two-way ANOVA and Bonferroni's t-test. Fracture mode analysis of the bonding interface was performed using a scanning electron microscope (SEM) and statistically analysed using the chi-square test. To disclose the demineralization inhibition potential through formation of an acid-base resistant zone (ABRZ), the bonded interface was exposed to a demineralizing solution (pH 4.5) for 90 min, and then 5% NaOCl for 20 min. After argon-ion etching, the interfacial ultrastructure was observed using an SEM. RESULTS µTBS values without thermocycling were not significantly different (p > 0.05) among 4 adhesive resins. After thermocycling, a significant decrease in µTBS was found in MB and MB II (p < 0.001), whereas SB and SBP showed no significant change (p > 0.05). Failure modes were significantly different (p < 0.05). An ABRZ was seen in SBP, MB, and MB II, while this protective zone was absent in SB. CONCLUSION Dentin bonding performance after thermocycling was material dependent in MMA-based adhesive resins. The ABRZ formation was only observed in the self-etching systems.
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Affiliation(s)
- Hamid Nurrohman
- Cariology and Operative Dentistry, Department of Restorative Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
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Waidyasekera K, Nikaido T, Weerasinghe D, Nurrohman H, Tagami J. Bonding durability of dual-curing composite core material with different self-etching adhesive systems in a model complete vertical root fracture reconstruction. J Adhes Dent 2011; 14:167-74. [PMID: 21734977 DOI: 10.3290/j.jad.a21848] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
PURPOSE This study evaluated a dual-curing composite along with different dentin adhesive systems for 1 year under water storage, as a new bonding method of root fragments in complete vertical root fracture. MATERIALS AND METHODS Bovine root fragments were bonded with the dual-curing resin composite Clearfil DC Core Automix (DCA) and one of three adhesive systems: two-step self-etching adhesive Clearfil SE Bond (SE), one-step self-etching adhesive Tokuyama Bond Force (BF), one-step dual-curing self-etching adhesive Clearfil DC Bond (DC). Microtensile bond strength (µTBS)/ultimate tensile bond strength (UTS), FE-SEM ultramorphology of fracture modes, and adhesive dentin interface were observed after water storage for periods of up to one year. The data were analyzed with two-way ANOVA. RESULTS µTBS was influenced by "dentin adhesive system" (F = 324.455, p < 0.001) and "length of water storage" (F = 8.470, p < 0.001). SE yielded significantly higher µTBS, regardless of storage period (p < 0.05) and maintained the initial µTBS without a significant change after 1 year of water storage (p > 0.05). From 24 h to 1 month, BF showed significantly higher bond strength than DC. UTS of DCA was influenced only by the curing mode of the material (F = 5.051, p = 0.027), but not by the length of water storage (F = 0.053, p > 0.05). CONCLUSION Two-step self-etching adhesive systems and dual-curing composite core material can be considered as a suitable bonding method for complete root fractures.
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Affiliation(s)
- Kanchana Waidyasekera
- Cariology and Operative Dentistry, Department of Restorative Sciences, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan.
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