1
|
Singh M, Singh S, Kumar L, Mattoo KA, Khalid I, Kota MZ, Udeabor SE, Baig FAH, Ishfaq M, Ibrahim M, Basheer SA. Evaluation of Retentive Strength of 50 Endodontically-Treated Single-Rooted Mandibular Second Premolars Restored with Cast Post Cores Using 5 Common Luting (Cement) Agents. Med Sci Monit 2024; 30:e944110. [PMID: 38685688 PMCID: PMC11069323 DOI: 10.12659/msm.944110] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2024] [Accepted: 03/01/2024] [Indexed: 05/02/2024] Open
Abstract
BACKGROUND A luting agent is a dental cement used to secure a dental restoration. This study aimed to evaluate retentive strength of 50 endodontically-treated single-rooted mandibular second premolars (extracted) restored using 5 common luting (cement) agents. MATERIAL AND METHODS Fifty single-rooted mandibular second premolars with adequate root length and uniform size/shape were decoronated. After completing endodontic biomechanical preparation and obturation, root canals of all specimens were prepared to receive a cast post core. Depending upon cementation type, CPC specimens were divided in 5 groups (10 each) (Gp): Zinc phosphate (Gp ZP), polycarboxylate (Gp PC), glass ionomer (Gp GI), resin-modified glass ionomer (Gp RGI), and resin cement (Gp RC). Retentive strength was determined using the adhesive failure pull-out test. Mean/standard deviations were calculated for tensile forces (in kilograms) and differences were determined using analysis of variance (ANOVA). Multiple comparison was performed using the t test. A P value of ≤0.05 indicated a statistically significant difference. RESULTS The order of mean tensile strength from higher to lower was Gp RC (21.46) >Gp RGI (18.17) >Gp GI (16.07) >Gp ZP (15.33) >Gp PC (13.63). Differences in retentive strengths between the cements were significant (P≤0.05). Multiple-group comparisons showed that except for Gp ZP and Gp GI, all groups differed significantly from each other. CONCLUSIONS All investigated cements provided optimal retentive strengths, with wide differences between them. Resin cements should be used when CPC removal is not anticipated, while polycarboxylate or zinc phosphate should be used if CPC removal is anticipated.
Collapse
Affiliation(s)
- Monika Singh
- Independent Researcher, Oakville, Ontario, Canada
| | - Soundarya Singh
- Department of Periodontology, Subharti Dental College and Hospital, Swami Vivekanand Subharti University, Meerut, Uttar Pradesh, India
| | - Lakshya Kumar
- Department of Prosthodontics, King George`s Medical University, Lucknow, Uttar Pradesh, India
| | - Khurshid A. Mattoo
- Department of Prosthetic Dental Sciences, College of Dentistry, Jazan University, Jazan, Saudi Arabia
| | - Imran Khalid
- Department of Oral and Maxillofacial Surgery, College of Dentistry, King Khalid University, Abha, Saudi Arabia
| | - Mohammad Zahir Kota
- Department of Oral and Maxillofacial Surgery, College of Dentistry, King Khalid University, Abha, Saudi Arabia
| | - Samuel Ebele Udeabor
- Department of Oral and Maxillofacial Surgery, College of Dentistry, King Khalid University, Abha, Saudi Arabia
| | - Fawaz Abdul Hamid Baig
- Department of Oral and Maxillofacial Surgery, College of Dentistry, King Khalid University, Abha, Saudi Arabia
| | - Muhammad Ishfaq
- Department of Oral and Maxillofacial Surgery, College of Dentistry, King Khalid University, Abha, Saudi Arabia
| | - Mohammed Ibrahim
- Department of Oral and Maxillofacial Surgery, College of Dentistry, King Khalid University, Abha, Saudi Arabia
| | - Sulphi Abdul Basheer
- Department of Oral and Maxillofacial Surgery, College of Dentistry, King Khalid University, Abha, Saudi Arabia
| |
Collapse
|
2
|
Oulghazi I, El Yamani A, Morchad B. Factors Influencing Vertical Radicular Fractures in Teeth Supported by Metallic Dental Core: A Scoping Review. Clin Cosmet Investig Dent 2024; 16:101-114. [PMID: 38665472 PMCID: PMC11044889 DOI: 10.2147/ccide.s458697] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2024] [Accepted: 04/11/2024] [Indexed: 04/28/2024] Open
Abstract
Purpose The aim of this work is to conduct a literature review to highlight all the parameters involved in sub-prosthetic radicular fractures of teeth supported by metallic dental core. Materials and Methods The following research was performed among published studies over the last 10 years in two PubMed/Medline and Scopus and supplemented by manual searching within the bibliographies. The search was restricted to publications in English and French. Results Out of the 1464 articles initially identified, 18 studies met our inclusion criteria and were subsequently included in the literature review. These consisted of eight Finite Element Analysis Studies, two Retrospective Studies and one Randomized Controlled Trial. The results of this review show that radicular fractures are influenced by several variables, including predisposition, with maxillary premolars and mandibular molars being the most commonly affected teeth. Intracanal preparation can induce crack formation, leading to localized high stress concentrations. Increased ferrule height to 2 mm significantly enhances dental fracture resistance. Using high modulus of elasticity alloys results in nearly complete stress transmission to dentin due to their limited deformability and absorption capacity. The highest fracture resistance is achieved when posts are sealed using resin-modified glass-ionomer cement. Longer posts may be preferable to prevent vertical fractures. Additionally, occlusal factors, through repetitive stresses, contribute to crack propagation from surface defects, a phenomenon termed fatigue fracture. Conclusion These findings have significant implications. Practitioners should be aware of the predisposition of certain teeth, the importance of preserving the ferrule effect, the choice of root post materials, post Cement Material and the role of occlusal forces in managing and preventing vertical root fractures.
Collapse
Affiliation(s)
- Ichraq Oulghazi
- Prosthodontics Department, Mohammed V University, Rabat, Morocco
| | - Amal El Yamani
- Prosthodontics Department, Mohammed V University, Rabat, Morocco
| | - Bouabid Morchad
- Prosthodontics Department, Mohammed V University, Rabat, Morocco
| |
Collapse
|
3
|
Szawioła-Kirejczyk M, Chmura K, Ryniewicz W. Dental ceramic damage associated with incorrect laboratory procedures. ADV CLIN EXP MED 2024; 33:0-0. [PMID: 38439611 DOI: 10.17219/acem/175971] [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: 03/27/2023] [Accepted: 11/27/2023] [Indexed: 03/06/2024]
Abstract
Ceramic is a commonly used material in dentistry for reconstructing missing teeth or their tissues due to its biocompatibility, durability and excellent esthetic properties. Despite these advantages, the ceramic restoration damage remains a significant clinical problem. Its causes can be divided into clinical and laboratory factors. The most known include uneven occlusion, improper preparation, trauma, or parafunctions. This study focuses on characterizing less known laboratory causes of ceramic restoration damage. We reviewed the current literature available in the PubMed and Scopus databases. On the basis of 63 selected studies, 3 basic causes of damage were identified: excessive stresses between the framework and ceramic veneering, poor quality of the connection between the facing layer and the substructure, and defects resulting from the nature of the ceramic material such as defects in the ceramic layer, brittleness and lack of flexibility. The stages of the manufacturing process of various permanent ceramic restorations were presented. By controlling these procedures, we can eliminate the errors, resulting in long-term effective functioning of the ceramic restorations.
Collapse
Affiliation(s)
| | - Karolina Chmura
- Department of Prosthodontics and Orthodontics, Dental Institute, Jagiellonian University Medical College, Cracow, Poland
| | - Wojciech Ryniewicz
- Department of Prosthodontics and Orthodontics, Dental Institute, Jagiellonian University Medical College, Cracow, Poland
| |
Collapse
|
4
|
Sayed ME, Reddy NK, Reddy NR, Mattoo KA, Jad YA, Hakami AJ, Hakami AK, Dighriri AM, Hurubi SY, Hamdi BA, Alshahrani AA, Alsubaiy EF, Alshehri AH, AlNijaiban MA. Evaluation of the Milled and Three-Dimensional Digital Manufacturing, 10-Degree and 20-Degree Preparation Taper, Groove and Box Auxiliary Retentive Features, and Conventional and Resin-Based Provisional Cement Type on the Adhesive Failure Stress of 3 mm Short Provisional Crowns. Med Sci Monit 2024; 30:e943237. [PMID: 38343120 PMCID: PMC10870690 DOI: 10.12659/msm.943237] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2023] [Accepted: 12/05/2023] [Indexed: 02/15/2024] Open
Abstract
BACKGROUND This study evaluated the effects of milling (CADCAM), 3D printing, preparation taper angles (10-degree and 20-degree), auxiliary retentive features (groove and box), and provisional cement types (conventional and resin-based) on the adhesive failure stress of 3-mm short provisional crowns (PC). The research was motivated by the need to understand how digital dentistry technologies impact the retention and durability of provisional crowns. MATERIAL AND METHODS A total of 160 working models (3D-printed) and PCs [80 milled (CopraTemp)/80 printed (Asiga)] were fabricated from two 10- and 20-degree typodont master models and two 20-degree 3D-printed master models (groove and box), simulating a 3 mm high all-ceramic short PC. After provisional cementation with conventional (Kerr TempBond) and resin-based (ProviTemp) cements, 16 subgroups (n=10 each) underwent thermocycling (10 000 cycles; 5-55°C) and pull-off tests on a universal testing machine. Statistical analysis was performed using one-way ANOVA and post hoc Tukey test. RESULTS Conventional cement failed at lower stress for milled (47.68 to 73.54) and printed (48.40 to 77.91) as compared to resin cement for milled (104.2 to 137.27) and printed (184.85 to 328.84), respectively, with significant differences. Increased taper and groove decreased failure load except for the printed PC/resin cement combination. Use of proximal box preparation increased retention significantly. Except for 20-degree taper cemented with conventional cement, the differences in auxiliary retentive features for milled and printed provisional crowns were statistically significant at P≤0.05. CONCLUSIONS 3D-printed PC, resin-based cement, 10-degree taper, and proximal box preparation were associated with higher retention than milled, conventional cements, 20-degree taper, and vertical groove.
Collapse
Affiliation(s)
- Mohammed E. Sayed
- Department of Prosthetic Dental Sciences, College of Dentistry, Jazan University, Jazan, Saudi Arabia
| | - Nandalur Kulashekar Reddy
- Department of Prosthetic Dental Sciences, College of Dentistry, Jazan University, Jazan, Saudi Arabia
| | - Naveen R. Reddy
- Department of Prosthetic Dental Sciences, College of Dentistry, Jazan University, Jazan, Saudi Arabia
| | - Khurshid A. Mattoo
- Department of Prosthetic Dental Sciences, College of Dentistry, Jazan University, Jazan, Saudi Arabia
| | - Yaser Ali Jad
- Intern, College of Dentistry, Jazan University, Jazan, Saudi Arabia
| | | | | | | | - Salman Y. Hurubi
- Intern, College of Dentistry, Jazan University, Jazan, Saudi Arabia
| | - Bassam Ali Hamdi
- Intern, College of Dentistry, Jazan University, Jazan, Saudi Arabia
| | - Ahid Amer Alshahrani
- Department of Dental Technology, Applied Medical Science, King Khalid University, Abha, Saudi Arabia
| | - Ebrahim Fihaid Alsubaiy
- Department of Prosthodontics, College of Dentistry, King Khalid University, Abha, Saudi Arabia
| | - Abdullah Hasan Alshehri
- Department of Prosthodontics, College of Dentistry, King Khalid University, Abha, Saudi Arabia
| | | |
Collapse
|
5
|
Tribst JPM, Werner A, Blom EJ. Failed Dental Implant: When Titanium Fractures. Diagnostics (Basel) 2023; 13:2123. [PMID: 37371017 DOI: 10.3390/diagnostics13122123] [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: 06/05/2023] [Revised: 06/15/2023] [Accepted: 06/19/2023] [Indexed: 06/29/2023] Open
Abstract
Despite the widespread use of titanium implants in orthopedic and dental surgeries, concerns have recently emerged regarding potential deformations and fractures after osseointegration. In a recent clinical case, a titanium implant fractured after successful osseointegration. This fracture occurred despite the absence of any significant trauma or excessive external force applied to the area. The fracture was attributed to a combination of factors, including abutment design flaws, material fatigue, and biomechanical stress imposed on the implant during functional loading. This raises concerns about the long-term durability and reliability of titanium implants, particularly in high-stress areas such as the posterior region or weight-bearing bones. An image was made with scanning electron microscopy showing the fracture region near the prosthetic platform and highlighting the knowledge that despite their ductility, titanium implants can fracture.
Collapse
Affiliation(s)
- João Paulo Mendes Tribst
- Department of Reconstructive Oral Care, Academic Centre for Dentistry Amsterdam (ACTA), Universiteit van Amsterdam and Vrije Universiteit, 1081 LA Amsterdam, The Netherlands
| | - Arie Werner
- Department of Dental Materials Science, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije University Amsterdam, 1081 LA Amsterdam, The Netherlands
| | - Erik J Blom
- Department of Reconstructive Oral Care, Academic Centre for Dentistry Amsterdam (ACTA), Universiteit van Amsterdam and Vrije Universiteit, 1081 LA Amsterdam, The Netherlands
| |
Collapse
|
6
|
Mokeem LS, Garcia IM, Melo MA. Degradation and Failure Phenomena at the Dentin Bonding Interface. Biomedicines 2023; 11:biomedicines11051256. [PMID: 37238927 DOI: 10.3390/biomedicines11051256] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2023] [Revised: 04/20/2023] [Accepted: 04/22/2023] [Indexed: 05/28/2023] Open
Abstract
Damage in the bonding interface is a significant factor that leads to premature failure of dental bonded restorations. The imperfectly bonded dentin-adhesive interface is susceptible to hydrolytic degradation and bacterial and enzyme attack, severely jeopardizing restorations' longevity. Developing caries around previously made restorations, also called "recurrent or secondary caries," is a significant health problem. The replacement of restorations is the most prevailing treatment in dental clinics, leading to the so-called "tooth death spiral". In other words, every time a restoration is replaced, more tooth tissue is removed, increasing the size of the restorations until the tooth is eventually lost. This process leads to high financial costs and detriment to patients' quality of life. Since the complexity of the oral cavity makes prevention a challenging task, novel strategies in Dental Materials and Operative fields are required. This article briefly overviews the physiological dentin substrate, features of dentin bonding, challenges and clinical relevance. We discussed the anatomy of the dental bonding interface, aspects of the degradation at the resin-dentin interface, extrinsic and intrinsic factors affecting dental bonding longevity, perspectives on resin and collagen degradation and how these subjects are connected. In this narrative review, we also outlined the recent progress in overcoming dental bonding challenges through bioinspiration, nanotechnology and advanced techniques to reduce degradation and improve dental bonding longevity.
Collapse
Affiliation(s)
- Lamia Sami Mokeem
- Ph.D. Program in Biomedical Sciences, University of Maryland School of Dentistry, Baltimore, MD 21201, USA
| | - Isadora Martini Garcia
- Division of Operative Dentistry, Department of General Dentistry, University of Maryland School of Dentistry, Baltimore, MD 21201, USA
| | - Mary Anne Melo
- Division of Operative Dentistry, Department of General Dentistry, University of Maryland School of Dentistry, Baltimore, MD 21201, USA
| |
Collapse
|
7
|
BARCELEIRO MDO, TARDEM C, ALBUQUERQUE EG, LOPES LDS, MARINS SS, POUBEL LA, BARCELOS R, ÑAUPARI-VILLASANTE R, LOGUERCIO AD, CALAZANS FS. Can composite packaging and selective enamel etching affect the clinical behavior of bulk-fill composite resin in posterior restorations? 24-month results of a randomized clinical trial. J Appl Oral Sci 2023; 31:e20220323. [PMID: 36790298 PMCID: PMC9972856 DOI: 10.1590/1678-7757-2022-0323] [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: 09/12/2022] [Accepted: 12/27/2022] [Indexed: 02/16/2023] Open
Abstract
OBJECTIVES This is a double-blind, split-mouth, randomized clinical study that aims to evaluate the influence of bulk-fill composite packaging presented in syringes (BSy) and capsules (BCa), and the effect of selective enamel etching (SEE) on the clinical performance of class I and II bulk-fill resin composite restorations after 24 months. METHODOLOGY A total of 295 class I or class II restorations were performed on 70 patients. One universal adhesive was applied in all restorations. SEE was used in 148 restorations and self-etching mode (SET) in 147 restorations. After the adhesive application, cavities were restored with Filtek Bulk-fill Posterior Restorative in syringes (BSy), Filtek One Bulk-fill in capsules (BCa), or Filtek Supreme Ultra in syringes with the incremental technique (In). All restorations were evaluated using the FDI criteria after one week and after six, 12, and 24 months. Kaplan-Meier survival analysis and Pearson's Chi-square test were used (α=0.05) for statistical analysis. RESULTS After 24 months, 62 patients were evaluated and four restorations were lost due to fracture (one for SEEBSy, two for SEEIn, and one for SETIn). No significant differences in the fracture and retention rate were found between groups (p>0.05). SEE showed significantly fewer marginal adaptation defects than SET (p<0.05). BCa and BSy groups showed fewer marginal discrepancies compared to In (p<0.05). Restorations performed with BCa showed less color mismatch than BSy or In (p<0.05). CONCLUSION Although all restorations exhibited satisfactory clinical performance after 24 months of clinical service, the clinical behavior of class I and II restorations' improved when performed with a bulk-fill composite in capsules, mainly when associated with a universal adhesive applied with SEE.
Collapse
Affiliation(s)
- Marcos de Oliveira BARCELEIRO
- Universidade Federal FluminenseDepartamento de Odontologia RestauradoraNova FriburgoRio de JaneiroBrasilUniversidade Federal Fluminense, Departamento de Odontologia Restauradora, Nova Friburgo, Rio de Janeiro, Brasil.
| | - Chane TARDEM
- Universidade Federal FluminenseDepartamento de Odontologia RestauradoraNiteróiRio de JaneiroBrasilUniversidade Federal Fluminense, Departamento de Odontologia Restauradora, Niterói, Rio de Janeiro, Brasil.
| | - Elisa Gomes ALBUQUERQUE
- Universidade Federal de Juiz de ForaDepartamento de Odontologia RestauradoraJuiz de Fora,Minas GeraisBrasilUniversidade Federal de Juiz de Fora, Departamento de Odontologia Restauradora, Juiz de Fora, Minas Gerais, Brasil.
| | - Leticia de Souza LOPES
- Universidade Estadual de Rio de JaneiroDepartamento de Odontologia RestauradoraRio de JaneiroRio de JaneiroBrasilUniversidade Estadual de Rio de Janeiro, Departamento de Odontologia Restauradora, Rio de Janeiro, Rio de Janeiro, Brasil.
| | - Stella Soares MARINS
- Universidade Federal FluminenseDepartamento de Odontologia RestauradoraNova FriburgoRio de JaneiroBrasilUniversidade Federal Fluminense, Departamento de Odontologia Restauradora, Nova Friburgo, Rio de Janeiro, Brasil.
| | - Luiz Augusto POUBEL
- Universidade Federal FluminenseDepartamento de Odontologia RestauradoraNova FriburgoRio de JaneiroBrasilUniversidade Federal Fluminense, Departamento de Odontologia Restauradora, Nova Friburgo, Rio de Janeiro, Brasil.
| | - Roberta BARCELOS
- Universidade Federal FluminenseDepartamento de Odontologia RestauradoraNova FriburgoRio de JaneiroBrasilUniversidade Federal Fluminense, Departamento de Odontologia Restauradora, Nova Friburgo, Rio de Janeiro, Brasil.
| | - Romina ÑAUPARI-VILLASANTE
- Universidade Estadual de Ponta GrossaDepartamento de Odontologia RestauradoraPonta GrossaParanáBrasilUniversidade Estadual de Ponta Grossa, Departamento de Odontologia Restauradora, Ponta Grossa, Paraná, Brasil.
| | - Alessandro Dourado LOGUERCIO
- Universidade Estadual de Ponta GrossaDepartamento de Odontologia RestauradoraPonta GrossaParanáBrasilUniversidade Estadual de Ponta Grossa, Departamento de Odontologia Restauradora, Ponta Grossa, Paraná, Brasil.
| | - Fernanda Signorelli CALAZANS
- Universidade Federal FluminenseDepartamento de Odontologia RestauradoraNova FriburgoRio de JaneiroBrasilUniversidade Federal Fluminense, Departamento de Odontologia Restauradora, Nova Friburgo, Rio de Janeiro, Brasil.
| |
Collapse
|
8
|
Spitznagel FA, Hoppe JS, Bonfante EA, Campos TMB, Langner R, Gierthmuehlen PC. Failure Load and Fatigue Behavior of Monolithic and Bi-Layer Zirconia Fixed Dental Prostheses Bonded to One-Piece Zirconia Implants. Materials (Basel) 2022; 15:8465. [PMID: 36499960 PMCID: PMC9740162 DOI: 10.3390/ma15238465] [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] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Revised: 11/19/2022] [Accepted: 11/23/2022] [Indexed: 06/17/2023]
Abstract
No evidence-based prosthetic treatment concept for 3-unit fixed-dental-prostheses (FDPs) on ceramic implants is currently available. Therefore, the aim of this in vitro study was to investigate the failure load and fatigue behavior of monolithic and bi-layer zirconia FDPs supported by one-piece ceramic implants. Eighty 3-unit FDPs supported by 160 zirconia-implants (ceramic.implant; vitaclinical) were divided into 4 groups (n = 20 each): Group Z-HT: 3Y-TZP monolithic-zirconia (Vita-YZ-HT); Group Z-ST: 4Y-TZP monolithic-zirconia (Vita-YZ-ST); Group FL: 3Y-TZP zirconia (Vita-YZ-HT) with facial-veneer (Vita-VM9); Group RL (Rapid-layer): PICN “table-top” (Vita-Enamic), 3Y-TZP-framework (Vita-YZ-HT). Half of the test samples (n = 10/group) were fatigued in a mouth-motion chewing-simulator (F = 98 N, 1.2 million-cycles) with simultaneous thermocycling (5−55 °C). All specimens (fatigued and non-fatigued) were afterwards exposed to single-load-to-failure-testing (Z010, Zwick). Statistical analysis was performed using ANOVA, Tukey’s post-hoc tests and two-sample t-tests (p < 0.05, Bonferroni-corrected where appropriate). All specimens withstood fatigue application. While the effect of fatigue was not significant in any group (p = 0.714), the choice of material had a significant effect (p < 0.001). Material FL recorded the highest failure loads, followed by Z-ST, Z-HT and RL, both with and without fatigue application. Taken together, all tested FDP material combinations survived chewing forces that exceeded physiological levels. Bi-Layer FL and monolithic Z-ST showed the highest resilience and might serve as reliable prosthetic reconstruction concepts for 3-unit FDPs on ceramic implants.
Collapse
Affiliation(s)
- Frank A. Spitznagel
- Department of Prosthodontics, Medical Faculty and University Hospital Düsseldorf, Heinrich-Heine University, Moorenstraße 5, 40225 Düsseldorf, Germany
| | - Johanna S. Hoppe
- Department of Prosthodontics, Medical Faculty and University Hospital Düsseldorf, Heinrich-Heine University, Moorenstraße 5, 40225 Düsseldorf, Germany
| | - Estevam A. Bonfante
- Department of Prosthodontics and Periodontology; Bauru School of Dentistry, University of Sao Paulo, Bauru 17012-230, SP, Brazil
| | - Tiago M. B. Campos
- Department of Prosthodontics and Periodontology; Bauru School of Dentistry, University of Sao Paulo, Bauru 17012-230, SP, Brazil
| | - Robert Langner
- Institute of Systems Neuroscience, Medical Faculty, Heinrich-Heine-University, 40225 Düsseldorf, Germany
- Institute of Neuroscience and Medicine, Brain and Behavior (INM-7), Research Center Jülich, 52425 Jülich, Germany
| | - Petra C. Gierthmuehlen
- Department of Prosthodontics, Medical Faculty and University Hospital Düsseldorf, Heinrich-Heine University, Moorenstraße 5, 40225 Düsseldorf, Germany
| |
Collapse
|
9
|
Grachev DI, Ruzuddinov NS, Arutyunov AS, Akhmedov GD, Dubova LV, Kharakh YN, Panin SV, Arutyunov SD. Algorithm for Designing a Removable Complete Denture (RCD) Based on the FEM Analysis of Its Service Life. Materials (Basel) 2022; 15:7246. [PMID: 36295314 PMCID: PMC9610509 DOI: 10.3390/ma15207246] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Revised: 10/10/2022] [Accepted: 10/12/2022] [Indexed: 06/16/2023]
Abstract
(1) Background: The paper addresses the computer simulation and prediction of the service life of the base of removable complete dentures (RCDs) under typical loads caused by biting and chewing food. For this purpose, the finite element method (FEM) was used. It is assumed that various blocks of teeth, such as incisors, canines, premolars and molars, are subjected to cyclic impacts during a human life. (2) Methods: Both symmetric and asymmetric mastication (two- and one-sided loads, respectively) cases were considered. The load level was assumed to be 100 N, which corresponds to the average muscular compression force of typical human jaws. (3) Results: The FEM analysis of the stress-strain state evolution for RCDs under cyclic loads was carried out. Maps of equivalent lines were drawn for the denture base in terms of its durability. A multi-axial criterion was implemented to determine the number of cycles prior to failure by the mechanism of a normal opening mode crack. The FEM-based assessment of the service life of RCDs enabled us to establish the critical stress concentration areas, thereby allowing for further planning for the correction of an occlusal scheme or teeth inclinations. As a result, the service life of RCDs under cyclic loading can be improved. (4) Conclusions: An algorithm for designing RCDs in the case of edentulism based on the FEM simulation using commercial software as part of the procedure is proposed.
Collapse
Affiliation(s)
- Dmitry I. Grachev
- Digital Dentistry Department, A.I. Yevdokimov Moscow State University of Medicine and Dentistry, 127473 Moscow, Russia
| | | | - Anatoliy S. Arutyunov
- Propaedeutics of Prosthetics Technologies in Dentistry Department, A.I. Yevdokimov Moscow State University of Medicine and Dentistry, 127473 Moscow, Russia
| | - Gadzhi D. Akhmedov
- Propaedeutics in Surgical Dentistry, A.I. Yevdokimov Moscow State University of Medicine and Dentistry, 127473 Moscow, Russia
| | - Lubov V. Dubova
- Orthopedic Dentistry Department, A.I. Yevdokimov Moscow State University of Medicine and Dentistry, 127473 Moscow, Russia
| | - Yaser N. Kharakh
- Digital Dentistry Department, A.I. Yevdokimov Moscow State University of Medicine and Dentistry, 127473 Moscow, Russia
| | - Sergey V. Panin
- Laboratory of Mechanics of Polymer Composite Materials, Institute of Strength Physics and Materials Science of Siberian Branch of Russian Academy of Sciences, 634055 Tomsk, Russia
| | - Sergey D. Arutyunov
- Digital Dentistry Department, A.I. Yevdokimov Moscow State University of Medicine and Dentistry, 127473 Moscow, Russia
| |
Collapse
|
10
|
Barkmeier WW, Tsujimoto A, Latta MA, Takamizawa T, Radniecki SM, Garcia-Godoy F. Effect of mold enclosure and chisel design on fatigue bond strength of dental adhesive systems. Eur J Oral Sci 2022; 130:e12864. [PMID: 35452147 PMCID: PMC9321680 DOI: 10.1111/eos.12864] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Accepted: 03/09/2022] [Indexed: 11/27/2022]
Abstract
To examine the effect of mold enclosure and chisel design on macro shear fatigue bond strengths of dental adhesive systems. The fatigue bond strength testing was conducted with two commercially available dental adhesive systems, (1) OptiBond eXTRa and (2) Scotchbond Universal, for bonding a resin composite (Filtek Supreme Ultra) to both enamel and dentin using a mold enclosure and a non‐mold enclosure with a knife‐edge and two sized notched‐edge chisel assemblies for loading. As a loading reference for the fatigue testing, macro shear bond strengths of the adhesive systems to enamel and dentin were conducted using a mold enclosure and a knife‐edge chisel assembly. The shear bond strengths with the mold enclosure using knife‐edge chisel assembly did not exhibit a significant difference between the adhesive systems for either enamel or dentin. The fatigue bond strengths of bonded specimens demonstrated significant differences when comparing the mold enclosure and non‐mold enclosure, but not between knife‐edge and notched‐edge chisel assemblies. The fatigue bond strengths of dental adhesive systems demonstrated significantly higher values when using mold‐enclosed bonded specimens than a non‐mold enclosure, regardless of type of chisel assembly.
Collapse
Affiliation(s)
- Wayne W Barkmeier
- Department of General Dentistry, Creighton University School of Dentistry, Omaha, Nebraska, USA
| | - Akimasa Tsujimoto
- Department of Operative Dentistry, University of Iowa College or Dentistry, Iowa City, Iowa, USA
| | - Mark A Latta
- Department of General Dentistry, Creighton University School of Dentistry, Omaha, Nebraska, USA
| | - Toshiki Takamizawa
- Department of Operative Dentistry, Nihon University School of Dentistry, Tokyo, Japan
| | - Scott M Radniecki
- Department of General Dentistry, Creighton University School of Dentistry, Omaha, Nebraska, USA
| | - Franklin Garcia-Godoy
- Department of Bioscience Research, University of Tennessee Health Science Center, Memphis, Tennessee, USA
| |
Collapse
|
11
|
Silva CO, Lopes LG, Torres ÉM, Teixeira RAG, Barata TJE, Carvalho AA, Souza JB. Attitudes of dentists toward maintaining, repairing, or replacing direct composite resin restorations. Gen Dent 2022; 70:72-77. [PMID: 35467548] [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: 06/14/2023]
Abstract
This study aimed to report the reasons for replacement of direct composite resin restorations in dental practices in Brazil. The study used a convenience sample of 213 dentists. A questionnaire was developed from previously validated instruments and sent electronically to prospective participants. The questions pertained to professional characteristics; criteria most frequently used in determining whether a direct composite resin restoration warranted replacement; and respondents' choice of treatment options (maintain, repair, or replace the restoration) in various clinical scenarios based on FDI World Dental Federation evaluation criteria, which are categorized into 3 groups: esthetic, functional, and biological properties. The descriptive statistical analysis was conducted using percentage frequencies, and associations between variables were tested using chi-square tests (α = 0.05). According to 47.9% of respondents, staining was the esthetic property that most often warranted replacement. For the functional property, 53.8% of respondents reported that fracture of material and retention was the most important factor indicating the need for replacement. For the clinical scenarios, 41.7% of respondents chose restoration replacement when evaluating esthetic properties, 59.8% when evaluating functional properties, and 64.4% when evaluating biological properties. Replacement, rather than maintenance or repair, was the most frequently reported clinical decision, and the dentists' professional profiles influenced treatment recommendations, with specialists exhibiting a slightly lower frequency of recommendations for replacement of direct composite resin restorations.
Collapse
|
12
|
de Farias AL, Rojas-Gualdrón DF, Mejía JD, Bussaneli DG, Santos-Pinto L, Restrepo M. Survival of stainless-steel crowns and composite resin restorations in molars affected by molar-incisor hypomineralization (MIH). Int J Paediatr Dent 2022; 32:240-250. [PMID: 34115431 DOI: 10.1111/ipd.12849] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/02/2021] [Revised: 06/02/2021] [Accepted: 06/03/2021] [Indexed: 11/30/2022]
Abstract
BACKGROUND Currently, there is no consensus on the superiority of any material for the restorative treatment of molars affected by molar-incisor hypomineralization (MIH). AIM To evaluate the survival of restorations with stainless-steel crown (SSC) or composite resin (CR) in first permanent molars affected by MIH for 24 months. DESIGN In this retrospective cohort study, 61 CR and 54 SSC restorations placed on molars affected by MIH of patients, aged between 7 and 10, that were treated and overseen at a university dental clinic in the period of 2017-2020 were evaluated. The primary outcome was the failure-free survival time. Parametric survival models were used for data censored by interval, and the comparison between SSC and CR was performed using the hazard ratio function with a 95% confidence interval. RESULTS The survival of SSC and CR restorations after 24 months was 94.4% and 49.2%, respectively. This difference was influenced by the presence of previous restoration (aHR = 3.4; 95% CI: 1.2-9.4) and cusp involvement (aHR = 4.0; 95% CI: 1.5-11.2). CONCLUSION In molars with MIH and the need for restorative treatment, SSC had a significantly higher survival rate than CR over 24 months.
Collapse
Affiliation(s)
- Aline Leite de Farias
- Department of Morphology, Genetics, Orthodontics and Pediatric Dentistry, Araraquara School of Dentistry, São Paulo State University (Unesp), Araraquara, São Paulo, Brazil
| | | | - Juan Diego Mejía
- Basic and Clinical Research Group in Dentistry, School of Dentistry, CES University, Medellín, Colombia
| | - Diego Girotto Bussaneli
- Department of Morphology, Genetics, Orthodontics and Pediatric Dentistry, Araraquara School of Dentistry, São Paulo State University (Unesp), Araraquara, São Paulo, Brazil
| | - Lourdes Santos-Pinto
- Department of Morphology, Genetics, Orthodontics and Pediatric Dentistry, Araraquara School of Dentistry, São Paulo State University (Unesp), Araraquara, São Paulo, Brazil
| | - Manuel Restrepo
- Department of Morphology, Genetics, Orthodontics and Pediatric Dentistry, Araraquara School of Dentistry, São Paulo State University (Unesp), Araraquara, São Paulo, Brazil
| |
Collapse
|
13
|
Sichi LGB, Pierre FZ, Arcila LVC, de Andrade GS, Tribst JPM, Ausiello P, di Lauro AE, Borges ALS. Effect of Biologically Oriented Preparation Technique on the Stress Concentration of Endodontically Treated Upper Central Incisor Restored with Zirconia Crown: 3D-FEA. Molecules 2021; 26:6113. [PMID: 34684695 PMCID: PMC8538003 DOI: 10.3390/molecules26206113] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Revised: 10/03/2021] [Accepted: 10/04/2021] [Indexed: 01/19/2023] Open
Abstract
The aim of this study was to evaluate the effect of biologically oriented preparation technique on the stress concentration of endodontically treated upper central incisors restored with zirconia crown (yttria-stabilized zirconia polycrystalline ceramic) through finite element analysis (FEA). Four models of maxillary central incisors containing enamel, dentin, periodontal ligament, cortical and medullary bone were created in CAD. Each model received a polymeric core-build up with nanofilled dental resin composite. The evaluated models were SM-preparation in shoulder 90°; CM-chamfer preparation; BOPT-biologically oriented preparation technique and BOPTB-BOPT preparation 1 mm below the cement-enamel junction. All models received zirconia crowns (5Y-TZP), fiberglass post and 1 mm ferrule. The models were imported into the analysis software with parameters for mechanical structural testing using the maximum principal stress and the tensile strength as the analysis criteria. Then, load of 150 N was applied at the cingulum with 45° slope to the long axis of the tooth, with the fixed base for each model. The type of marginal preparation affected the stresses concentration in endodontically treated teeth and in the zirconia crown margin. Considering the stress magnitude only, BOPT is a viable option for anterior monolithic zirconia crowns; however, with the highest stress magnitude at the restoration margin.
Collapse
Affiliation(s)
- Luigi Giovanni Bernardo Sichi
- Department of Dental Materials and Prosthodontics, Institute of Science and Technology, São Paulo State University (Unesp), São José dos Campos 12245-000, Brazil
| | - Fernanda Zapater Pierre
- Department of Dental Materials and Prosthodontics, Institute of Science and Technology, São Paulo State University (Unesp), São José dos Campos 12245-000, Brazil
| | - Laura Viviana Calvache Arcila
- Department of Dental Materials and Prosthodontics, Institute of Science and Technology, São Paulo State University (Unesp), São José dos Campos 12245-000, Brazil
| | | | | | - Pietro Ausiello
- School of Dentistry, University of Naples Federico II, via S. Pansini 5, 80131 Naples, Italy
| | | | - Alexandre Luiz Souto Borges
- Department of Dental Materials and Prosthodontics, Institute of Science and Technology, São Paulo State University (Unesp), São José dos Campos 12245-000, Brazil
| |
Collapse
|
14
|
França FM, Tenuti JG, Broglio IP, Paiva LE, Basting RT, Turssi CP, do Amaral FL, Reis AF, Vieira-Junior WF. Low- and high-viscosity bulk-fill resin composites: a comparison of microhardness, microtensile bond strength, and fracture strength in restored molars. Acta Odontol Latinoam 2021; 34:173-182. [PMID: 34570866 DOI: 10.54589/aol.34/2/173] [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: 04/01/2021] [Accepted: 06/01/2021] [Indexed: 06/13/2023]
Abstract
The aim of this study was to compare low- and high-viscosity bulk-fill composites for Knoop microhardness (KHN), microtensile bond strength (MTBS) to dentin in occlusal cavities, and fracture strength (FS) in molars with mesialocclusal- distal restoration. Disk-shaped samples with different thicknesses (2 or 4 mm) of low-viscosity (SDR Flow, Dentsply) and high-viscosity bulk-fill composites (Filtek BulkFill, 3M ESPE; and Tetric-N Ceram Bulk Fill, Ivoclar Vivadent) were prepared for top and bottom KHN analysis (n=10). MTBS to dentin and fracture pattern was evaluated in human molars with occlusal cavities restored with (n=10): conventional nanocomposite (Z350XT, 3M ESPE), low-viscosity (Filtek Bulk-fill Flow, 3M ESPE) or high-viscosity bulk-fill composites (Filtek BulkFill). The FS and fracture pattern of human molar with mesial-occlusal-distal restorations submitted or not to thermomechanical cycling were investigated (n=10) using: intact tooth (control), and restoration based on conventional microhybrid composite (Z250, 3M ESPE), low-viscosity (SDR Flow) or high-viscosity bulk-fill composites (Filtek BulkFill). The data were submitted to split-plot ANOVA (KHN), one-way ANOVA (MTBS), two-way ANOVA (FS) followed by Tukey's test (α=0.05). For KHN, there was no significant difference for the resin composites between the top and bottom. For MTBS, no significant differences among the materials were detected; however, the low-viscosity composite presented lower frequency of adhesive failures. For FS, there was no significant difference between composites and intact tooth regardless of thermomechanical cycling. Low- and high-viscosity bulk-fill composites have comparable microhardness and microtensile bond strength when used in occlusal restorations. Likewise, the bulk-fill composites present similar fracture strength in molars with mesio-occlusal-distal restorations.
Collapse
Affiliation(s)
- Fabiana Mg França
- Faculdade São Leopoldo Mandic, Instituto de Pesquisas São Leopoldo Mandic, Departamento de Odontologia Restauradora, Campinas, Brasil.
| | - Jonathan Gb Tenuti
- Faculdade São Leopoldo Mandic, Instituto de Pesquisas São Leopoldo Mandic, Departamento de Odontologia Restauradora, Campinas, Brasil
| | - Isabela P Broglio
- Faculdade São Leopoldo Mandic, Instituto de Pesquisas São Leopoldo Mandic, Departamento de Odontologia Restauradora, Campinas, Brasil
| | - Lara Ej Paiva
- Faculdade São Leopoldo Mandic, Instituto de Pesquisas São Leopoldo Mandic, Departamento de Odontologia Restauradora, Campinas, Brasil
| | - Roberta T Basting
- Faculdade São Leopoldo Mandic, Instituto de Pesquisas São Leopoldo Mandic, Departamento de Odontologia Restauradora, Campinas, Brasil
| | - Cecília P Turssi
- Faculdade São Leopoldo Mandic, Instituto de Pesquisas São Leopoldo Mandic, Departamento de Odontologia Restauradora, Campinas, Brasil
| | - Flávia Lb do Amaral
- Faculdade São Leopoldo Mandic, Instituto de Pesquisas São Leopoldo Mandic, Departamento de Odontologia Restauradora, Campinas, Brasil
| | - André F Reis
- University of Florida, Health Faculty Dental Practice, Operative Division, Gainesville, USA
| | - Waldemir F Vieira-Junior
- Faculdade São Leopoldo Mandic, Instituto de Pesquisas São Leopoldo Mandic, Departamento de Odontologia Restauradora, Campinas, Brasil
| |
Collapse
|
15
|
Borges ALS, Grangeiro MTV, de Andrade GS, de Melo RM, Baroudi K, Silva-Concilio LR, Tribst JPM. Stress Concentration of Endodontically Treated Molars Restored with Transfixed Glass Fiber Post: 3D-Finite Element Analysis. Materials (Basel) 2021; 14:4249. [PMID: 34361443 DOI: 10.3390/ma14154249] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/10/2021] [Revised: 06/30/2021] [Accepted: 07/02/2021] [Indexed: 01/08/2023]
Abstract
The loss of dental structure caused by endodontic treatment is responsible for a decrease in tooth resistance, which increases susceptibility to fracture. Therefore, it is important that minimally invasive treatments be performed to preserve the dental structure and increase the resistance to fracture of endodontically treated posterior teeth. To evaluate under axial loads, using the finite element method, the stress distribution in endodontically treated molars restored with both transfixed or vertical glass fiber posts (GFP) and resin composite. An endodontically treated molar 3D-model was analyzed using finite element analyses under four different conditions, class II resin composite (G1, control model), vertical glass fiber post (G2), transfixed glass fiber posts (G3) and vertical and transfixed glass fiber posts (G4). Ideal contacts were considered between restoration/resin composite and resin composite/tooth. An axial load (300 N) was applied to the occlusal surface. The resulting tensile stresses were calculated for the enamel and dentin tissue from five different viewports (occlusal, buccal, palatal, mesial and distal views). According to the stress maps, similar stress trends were observed, regardless of the glass fiber post treatment. In addition, for the G1 model (without GFP), a high-stress magnitude can be noticed in the proximal faces of enamel (7.7 to 14 MPa) and dentin (2.1 to 3.3 MPa) tissue. The use of transfixed glass fiber post is not indicated to reduce the stresses, under axial loads, in both enamel and dentin tissue in endodontically treated molar with a class II cavity.
Collapse
|
16
|
Shafiei F, Dehghanian P, Ghaderi N, Doozandeh M. Fracture resistance of endodontically treated premolars restored with bulk-fill composite resins: The effect of fiber reinforcement. Dent Res J (Isfahan) 2021; 18:60. [PMID: 34497695 PMCID: PMC8404566] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Revised: 01/09/2021] [Accepted: 03/14/2021] [Indexed: 11/26/2022] Open
Abstract
BACKGROUND Coronal restoration of endodontically treated teeth (ETT) with mesio-occluso-distal (MOD) cavities is of a great importance in long-term success of the treatment. This study evaluated the effect of fiber reinforcement on the fracture resistance (FR) of ETT restored with flowable or paste bulk (PB)-fill composite resin compared to conventional composite (CC) resin. MATERIALS AND METHODS In this in vitro experimental study, eighty maxillary premolars were divided into eight groups (n = 10). The first group was left intact (G1) and the other groups received MOD cavities along with endodontic treatment. G2: Remained unrestored while the other experimental groups were restored with three types of composite resin with or without fiber insertion. G3: CC resin, G4: PB fill, G5: Flowable bulk fill (FB). G6: Fiber + CC, G7: Fiber + PB, and G8: Fiber + FB. FR was tested at crosshead speed of 1 mm/min and recorded in Newton. Data were analyzed using one-way analysis of variance and Tukey's tests at significance level of P < 0.05. RESULTS G1 and G2 revealed the highest and the lowest FR, respectively. The mean FR of the testing groups in Newton was as follows: G1 = 1204.8 A, G2 = 352.1 C, G3 = 579.6 BD, G4 = 596.7 BD, G5 = 624.9 BDE, G6 = 858.3 E, G7 = 529.6 CB, and G8 = 802.5DE. Different uppercase letters indicate the significant difference between the groups. CONCLUSION The effect of fiber insertion on FR depended on the type of composite resin; the highest reinforcing effect was obtained in the CC resin + fiber, followed by bulk-fill flowable + fiber, and flowable bulk (FB)-fill composite resin. The strength of the former was significantly higher than the conventional and PB fill with and without fiber.
Collapse
Affiliation(s)
- Fereshteh Shafiei
- Department of Operative Dentistry, Oral and Dental Disease Research Center, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Paria Dehghanian
- Department of Operative Dentistry, Oral and Dental Disease Research Center, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Nasibeh Ghaderi
- Department of Operative Dentistry, Oral and Dental Disease Research Center, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Maryam Doozandeh
- Department of Operative Dentistry, Oral and Dental Disease Research Center, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran,Address for correspondence: Dr. Maryam Doozandeh, Department of Operative Dentistry, Oral and Dental Disease Research Center, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran. E-mail:
| |
Collapse
|
17
|
Dos Santos Sousa G, Guimarães GF, Marcelino E, Rodokas JEP, de Oliveira Júnior AJ, Cesarino I, Leão AL, Dos Santos Riccardi C, Arjmand M, Simões RP. Shrinkage Stress and Temperature Variation in Resin Composites Cured via Different Photoactivation Methods: Insights for Standardisation of the Photopolymerisation. Polymers (Basel) 2021; 13:2065. [PMID: 34201846 DOI: 10.3390/polym13132065] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Revised: 05/12/2021] [Accepted: 05/13/2021] [Indexed: 11/16/2022] Open
Abstract
The literature has shown that there is no consensus regarding the best resin composite photoactivation protocol. This study evaluated the efficiency of the conventional, soft-start, pulse-delay and exponential protocols for photoactivation of resin composites in reducing the shrinkage stress and temperature variation during the photopolymerisation. The photoactivation processes were performed using a photocuring unit and a smartphone app developed to control the irradiance according each photoactivation protocol. These photoactivation methods were evaluated applying photoactivation energies recommended by the resins manufactures. Three brands of resin composites were analysed: Z-250, Charisma and Ultrafill. The cure effectiveness was evaluated through depth of cure experiments. All results were statistically evaluated using one-way and multi-factor analysis of variance (ANOVA). The use of exponential and pulse-delay methods resulted in a significant reduction of the shrinkage stress for all evaluated resins; however, the pulse-delay method required too long a photoactivation time. The increases on the temperature were lower when the exponential photoactivation was applied; however, the temperature variation for all photoactivation protocols was not enough to cause damage in the restoration area. The evaluation of the depth of cure showed that all photoactivation protocols resulted in cured resins with equivalent hardness, indicating that the choice of an alternative photoactivation protocol did not harm the polymerisation. In this way, the results showed the exponential protocol as the best photoactivation technique for practical applications.
Collapse
|
18
|
Takamiya H, Tsujimoto A, Teixeira EC, Jurado CA, Takamizawa T, Barkmeier WW, Latta MA, Miyazaki M, Garcia-Godoy F. Bonding and wear properties of self-adhesive flowable restorative materials. Eur J Oral Sci 2021; 129:e12799. [PMID: 34057777 DOI: 10.1111/eos.12799] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [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: 12/22/2020] [Revised: 03/10/2021] [Accepted: 04/16/2021] [Indexed: 11/29/2022]
Abstract
The purpose of this study was to evaluate the bonding and wear properties of self-adhesive flowable restorative materials. Five self-adhesive flowable restorative materials were used. The study parameters were: (i) shear bond strengths; (ii) microleakage; (iii) occlusal wear; and (iv) qualitative evaluation of the bonding interface. The range of shear bond strengths of the materials was as follows: 7.4-12.2 MPa to ground enamel, 22.5-32.5 MPa to etched enamel, and 1.3-4.2 MPa to dentin. The microleakage scores of the materials did not show any statistically significant differences regardless of the presence or absence of etching. The wear facets on the materials showed 0.099-0.447 mm3 of volume loss and 148.6-365.3 µm maximum depth, with statistically significant differences between materials. Scanning electron microscopic images of the interfaces of the materials showed good adaptation regardless of substrate. The bonding and wear properties of self-adhesive flowable restorative materials were still limited and showed lower values than previously reported results for nanofilled composites with an adhesive system. Selective enamel etching can improve the bonding performance of these materials.
Collapse
Affiliation(s)
- Hiroshi Takamiya
- Department of Operative Dentistry, Nihon University School of Dentistry, Tokyo, Japan
| | - Akimasa Tsujimoto
- Department of Operative Dentistry, University of Iowa, College of Dentistry, Iowa City, IA, USA
| | - Erica C Teixeira
- Department of Operative Dentistry, University of Iowa, College of Dentistry, Iowa City, IA, USA
| | - Carlos A Jurado
- Prosthodontics, Texas Tech University Health Sciences Center, El Paso, TX, USA
| | - Toshiki Takamizawa
- Department of Operative Dentistry, Nihon University School of Dentistry, Tokyo, Japan
| | - Wayne W Barkmeier
- Department of General Dentistry, Creighton University School of Dentistry, Omaha, NE, USA
| | - Mark A Latta
- Department of General Dentistry, Creighton University School of Dentistry, Omaha, NE, USA
| | - Masashi Miyazaki
- Department of Operative Dentistry, Nihon University School of Dentistry, Tokyo, Japan
| | - Franklin Garcia-Godoy
- Department of Bioscience Research, University of Tennessee Health Science Center, Memphis, TN, USA
| |
Collapse
|
19
|
Tribst JPM, Lo Giudice R, Dos Santos AFC, Borges ALS, Silva-Concílio LR, Amaral M, Lo Giudice G. Lithium Disilicate Ceramic Endocrown Biomechanical Response According to Different Pulp Chamber Extension Angles and Filling Materials. Materials (Basel) 2021; 14:1307. [PMID: 33803194 DOI: 10.3390/ma14051307] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/16/2021] [Revised: 03/02/2021] [Accepted: 03/04/2021] [Indexed: 12/28/2022]
Abstract
The purpose of this study is to evaluate the effect of pulp chamber extension angles and filling material mechanical properties on the biomechanical response of a ceramic endocrown. A 3D model of maxillary molar that underwent endodontically treatment was exported to computer aided design software to conduct finite element analysis (FEA). The endocrown model was modified considering different pulp chamber extension angles (right angle; 6°, 12° and 18° of axial divergence). The solids were imported into the computer aided engineering software in Standard for the Exchange of Product Data (STEP) format. Nine different filling materials were simulated to seal the orifice of the root canal system under each endocrown restoration (resin composite, bulk-fill resin composite, alkasite, flowable resin composite, glass ionomer cement, autocured resin-reinforced glass ionomer cement, resin cement, bulk-fill flowable resin composite, zinc oxide cement), totaling 36 models. An axial load (300 N) was applied at the occlusal surface. Results were determined by colorimetric graphs of von-Misses stress (VMS) and Maximum Principal Stress (MPS) on tooth, cement layer, and endocrown restorations. VMS distribution showed a similar pattern between the models, with more stress at the load region for the right-angled endocrowns. The MPS showed that the endocrown intaglio surface and cement layer showed different mechanical responses with different filing materials and pulp chamber angles. The stress peaks plotted in the dispersion plot showed that the filling material stiffness is proportional to the stress magnitude in the endocrown, cement layer and tooth adhesive surface. In addition, the higher the pulp chamber preparation angle, the higher the stress peak in the restoration and tooth, and the lower the stress in the cement layer. Therefore, 6° and 12° pulp chamber angles showed more promising balance between the stresses of the adhesive interface structures. Under the conditions of this study, rigid filling materials were avoided to seal the orifice of root canal system when an endocrown restoration was planned as rehabilitation. In addition, the pulp chamber axial walls were prepared between 6° and 12° of divergence to balance the stress magnitude in the adhesive interface for this treatment modality.
Collapse
|
20
|
Latimer JM, Gharpure AS, Kahng HJ, Aljofi FE, Daubert DM. Interproximal open contacts between implant restorations and adjacent natural teeth as a risk-indicator for peri-implant disease-A cross-sectional study. Clin Oral Implants Res 2021; 32:598-607. [PMID: 33629375 DOI: 10.1111/clr.13730] [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] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Revised: 01/27/2021] [Accepted: 02/17/2021] [Indexed: 11/28/2022]
Abstract
OBJECTIVES The primary aim of this study was to investigate the relationship between interproximal open contacts and peri-implant disease. The secondary aim was to assess patient-reported outcome measures in relation to contact status. MATERIALS AND METHODS A cross-sectional study was performed on 61 patients with 142 implants adjacent to at least one natural tooth. Patients underwent a clinical examination to assess contact status and width, plaque index (PI), gingival index (GI), periodontal probing depths (PPD), and bleeding on probing (BoP). Radiographic marginal bone level was measured in vertical bitewings taken within one year. A diagnosis was given to each implant. Last, subjects completed a brief questionnaire. Rao-scott chi-squared tests and generalized estimating equations (GEE) models were used to compare outcomes between groups. RESULTS Seventy-seven (54.2%) implants were found to have ≥1 interproximal open contact. Sixty-five (45.8%) implants had closed contacts only. Implants with interproximal open contacts were significantly associated with peri-implant mucositis and peri-implantitis (p = .003) and increased prevalence of peri-implant disease (adjusted PR = 1.57; 95% CI: 1.09-2.27, p = .015). Open contact status was also associated with higher PPD (p = .045), PI scores (p = .036), and GI scores (p = .021). Open contact prevalence was 75.4% on the patient-level and 54.2% on the implant-level, involving the mesial surface of the implant restorations 68.5% of the time (p < .001). CONCLUSION Interproximal open contacts between implant restorations and adjacent natural teeth are a risk indicator for peri-implant disease. Adequate contact between implant restorations and natural teeth may contribute to the health of peri-implant tissues.
Collapse
Affiliation(s)
- Jessica M Latimer
- Department of Periodontics, University of Washington School of Dentistry, Seattle, WA, USA.,Division of Oral Medicine, Infection, and Immunity, Harvard School of Dental Medicine, Boston, MA, USA
| | - Amit S Gharpure
- Department of Periodontics, University of Washington School of Dentistry, Seattle, WA, USA
| | - Hahngoo J Kahng
- Department of Periodontics, University of Washington School of Dentistry, Seattle, WA, USA
| | - Faisal E Aljofi
- Preventive Dental Science Department, College of Dentistry, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
| | - Diane M Daubert
- Department of Periodontics, University of Washington School of Dentistry, Seattle, WA, USA
| |
Collapse
|
21
|
Tribst JPM, Borges ALS, Silva-Concílio LR, Bottino MA, Özcan M. Effect of Restorative Material on Mechanical Response of Provisional Endocrowns: A 3D-FEA Study. Materials (Basel) 2021; 14:ma14030649. [PMID: 33572533 PMCID: PMC7866804 DOI: 10.3390/ma14030649] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Revised: 01/22/2021] [Accepted: 01/26/2021] [Indexed: 12/14/2022]
Abstract
The goal of this study was to evaluate the stress distribution in an endocrown restoration according to different provisional restorative materials. An endodontically treated maxillary molar model was selected for conducting the finite element analysis (FEA), with a determined amount of dental remnant of 1.5 mm. The model was imported to the analysis software (ANSYS 19.2, ANSYS Inc., Houston, TX, USA) in STEP format. All contacts were considered perfectly bonded. The mechanical properties of each structure were considered isotropic, linear, elastic, and homogeneous. Three different provisional restorative materials were simulated (acrylic resin, bis-acrylic resin, and resin composite). An axial load (300 N) was applied at the occlusal surface in the center of the restoration. Results were determined by colorimetric stress maps of maximum principal stress, maximum shear stress, and total deformation. The different materials influenced the stress distribution for all structures; the higher the material’s elastic modulus, the lower the stress magnitude on the cement layer. In the present study, all provisional restorative materials showed similar stress patterns in the endocrown and on the cement layer however, with different magnitude. Based on this study limitation, the use of resin composite to manufacture provisional endocrowns is suggested as a promising material to reduce the stresses in the cement layer and in the dental tissue surfaces.
Collapse
Affiliation(s)
- João Paulo Mendes Tribst
- School of Dentistry, University of Taubaté, Taubaté, São Paulo 12020-340, Brazil; (J.P.M.T.); (L.R.S.-C.)
| | - Alexandre Luiz Souto Borges
- Institute of Science and Technology, São Paulo State University (Unesp), São José dos Campos, São Paulo 12220-690, Brazil; (A.L.S.B.); (M.A.B.)
| | | | - Marco Antonio Bottino
- Institute of Science and Technology, São Paulo State University (Unesp), São José dos Campos, São Paulo 12220-690, Brazil; (A.L.S.B.); (M.A.B.)
| | - Mutlu Özcan
- Division of Dental Biomaterials, Center for Dental and Oral Medicine, Clinic for Reconstructive Dentistry, University of Zurich, 8032 Zurich, Switzerland
- Correspondence:
| |
Collapse
|
22
|
de Andrade GS, Pinto ABA, Tribst JPM, Chun EP, Borges ALS, de Siqueira Ferreira Anzaloni Saavedra G. Does overlay preparation design affect polymerization shrinkage stress distribution? A 3D FEA study. Comput Methods Biomech Biomed Engin 2021; 24:1026-1034. [PMID: 33410710 DOI: 10.1080/10255842.2020.1866561] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [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: 12/18/2022]
Abstract
This study evaluated the polymerization shrinkage stress of three tooth preparation designs for indirect ceramic overlay by finite element analysis: isthmus preparation (IST); without isthmus preparation (wIST); and non-retentive preparation (nRET). The models were created based in prepared dental typodonts and were digitally impressed with an intraoral scanner. The interfaces in all models were considered perfectly bonded and all materials were considered homogeneous, linear, and isotropic. The polymerization shrinkage of the cement layer (100 µm) was simulated and evaluated by maximum principal stress criteria. The stress peaks followed this sequence: restoration = IST (13.4 MPa) > wIST (9.3 MPa) > nRET (9 MPa); cement layer = IST (16.9 MPa) > wIST (12.6 MPa) > nRET (10-7.5 MPa); and teeth = IST (10.7 MPa) > wIST (10.5 MPa) > (9 MPa). For the cement layer, the non-retentive preparation (nRET) had the lowest shrinkage stress from all the groups, obtaining a more homogeneous stress distribution on the cement surface. Regarding the abutment teeth, the IST generated a higher shrinkage stress area on the dental structure, concentrating higher stress magnitude at the axiopulpar and axiogingival angles. Non-retentive preparation seems to reduce polymerization shrinkage stress.
Collapse
Affiliation(s)
- Guilherme Schmitt de Andrade
- Department of Dental Materials and Prosthodontics, Institute of Science and Technology, São Paulo State University (UNESP), São José dos Campos, Brazil
| | - Alana Barbosa Alves Pinto
- Department of Dental Materials and Prosthodontics, Institute of Science and Technology, São Paulo State University (UNESP), São José dos Campos, Brazil
| | - João Paulo Mendes Tribst
- Departament of Dentistry, Postgraduate Program in Dentistry, University of Taubaté (UNITAU), Taubaté, Brazil
| | | | - Alexandre Luiz Souto Borges
- Department of Dental Materials and Prosthodontics, Institute of Science and Technology, São Paulo State University (UNESP), São José dos Campos, Brazil
| | | |
Collapse
|
23
|
Palotie U, Vehkalahti MM. Type and time of first re-intervention of posterior restorations - 13-year scenario at the public dental service. Acta Odontol Scand 2020; 78:370-376. [PMID: 32072834 DOI: 10.1080/00016357.2020.1728378] [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: 10/25/2022]
Abstract
Objectives: We investigated the first re-interventions of two- and three-surface direct restorations on posterior teeth, specifically noting the type and time of the first re-intervention.Materials and methods: In 2002, altogether 5542 posterior two- and three-surface composite and amalgam restorations were done for 3051 patients aged 25-30 years at Helsinki City Public Dental Service (PDS). Based on electronic patient records, we analysed all restorations (n = 2445) having re-intervention during a 13-year follow-up. We recorded the type of tooth, restoration size, and type of first re-intervention. The time to re-intervention was the interval between the date of the placement of restoration at the year 2002 and its first re-intervention.Results: Restorative treatment was the most common (77.9%) first re-intervention, followed by endodontics (11.5%), extractions (5.2%), and other (5.4%). Males, more frequently than females, had extraction or endodontics as first re-intervention. The average time to re-intervention was 5.7 years (SD 3.8; median 5.2). Both median and mean times were shortest for cases involving endodontics or extractions.Conclusions: For the majority of two- and three-surface posterior restorations, the first re-intervention is restorative (replacement or repair of restoration). The shortest time to re-intervention is for restorations that have endodontics or extraction as the first re-intervention.
Collapse
Affiliation(s)
- Ulla Palotie
- City of Helsinki Department of Social Services and Health Care, Metropolitan Area Department of Oral Special Care, Helsinki, Finland.,HUH Oral Diseases Teaching and Dental Care Unit, HUS, Finland.,Department of Oral and Maxillofacial Diseases, Faculty of Medicine, University of Helsinki, Helsinki, Finland
| | - Miira M Vehkalahti
- Department of Oral and Maxillofacial Diseases, Faculty of Medicine, University of Helsinki, Helsinki, Finland
| |
Collapse
|
24
|
Markham MD, Tsujimoto A, Barkmeier WW, Jurado CA, Fischer NG, Watanabe H, Baruth AG, Latta MA, Garcia-Godoy F. Influence of 38% silver diamine fluoride application on bond stability to enamel and dentin using universal adhesives in self-etch mode. Eur J Oral Sci 2020; 128:354-360. [PMID: 32395905 DOI: 10.1111/eos.12701] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/15/2020] [Indexed: 11/29/2022]
Abstract
In order to evaluate the influence of 38% silver diamine fluoride (SDF) application on enamel and dentin bond stability of universal adhesives in self-etch mode, a 38% SDF and three universal adhesives were used in this study. Initial shear bond strength (ISBS), fatigue bond strength (FBS), and shear bond strength of survivors (SBSS) to enamel and dentin of universal adhesives in self-etch mode, with and without SDF application, were determined. SDF was applied to the polished enamel or dentin surface for 1 min, water-rinsed and air-dried for comparison with controls. The universal adhesives were applied to the prepared samples and composite resin was bonded using a mold-enclosed method. Enamel bond stability of universal adhesives with SDF (ISBS: 14.7-20.4 MPa; FBS: 5.5-7.4 MPa and SBSS: 14.4-21.5 MPa) was significantly weaker than those without SDF (ISBS: 28.0-29.2 MPa; FBS: 12.1-15.6 MPa and SBSS: 28.4-34.4 MPa). Dentin bond stability with SDF (ISBS: 14.8-20.9 MPa; FBS: 7.1-8.2 MPa and SBSS: 17.3-21.8 MPa) was also significantly weaker than without SDF (ISBS: 19.3-36.1 MPa; FBS: 11.0-13.7 MPa and SBSS: 22.2-34.6 MPa). The results suggest that SDF application on enamel and dentin reduces the bond stability of universal adhesives in self-etch mode.
Collapse
Affiliation(s)
- Mark D Markham
- Department of General Dentistry, Creighton University School of Dentistry, Omaha, NE, USA
| | - Akimasa Tsujimoto
- Department of General Dentistry, Creighton University School of Dentistry, Omaha, NE, USA.,Department of Operative Dentistry, Nihon University School of Dentistry, Tokyo, Japan
| | - Wayne W Barkmeier
- Department of General Dentistry, Creighton University School of Dentistry, Omaha, NE, USA
| | - Carlos A Jurado
- Clinical Digital Dentistry, A.T. Still University Arizona School of Dentistry & Oral Health, Mesa, AZ, USA
| | - Nicholas G Fischer
- Minnesota Dental Research Center for Biomaterials and Biomechanics, University of Minnesota School of Dentistry, Minneapolis, MN, USA
| | - Hidehiko Watanabe
- Department of Restorative Dentistry, Oregon Health and Science University School of Dentistry, Portland, OR, USA
| | - Andrew G Baruth
- Department of Physics, Creighton University College of Arts and Sciences, Omaha, NE, USA
| | - Mark A Latta
- Department of General Dentistry, Creighton University School of Dentistry, Omaha, NE, USA
| | - Franklin Garcia-Godoy
- Department of Bioscience Research, University of Tennessee Health Science Center College of Dentistry, Memphis, TN, USA
| |
Collapse
|
25
|
Abstract
Sjögren's syndrome (SS) is a complex autoimmune disease that predominantly affects the exocrine glands, notably the salivary and lacrimal glands, resulting in dryness of the mucosa recognized as xerostomia. Chief oral complications reported by patients consist of high caries rate, burning sensation of the mucosa, early tooth loss, intensified tooth wear and repetitive failure of dental restorations. In particular, due to the decreased salivary flow, conventional removable prostheses might irritate the mucosa and lead to painful ulcerations at the borders of the denture. Implant-supported prostheses offer a unique solution to the difficulties experienced by edentulous patients with Sjögren's syndrome. This research showed no signs of peri-implantitis or peri-implant mucositis during 7-years following the placement of implants. The present study indicates that successful long-term maintenance of dental implants can be also achieved in SS patients.
Collapse
Affiliation(s)
| | - Nasrin Esfahanizadeh
- Department of Periodontology, Faculty of Dentistry, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
| | - Reza Vafadoost
- Department of Periodontology, Faculty of Dentistry, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
| |
Collapse
|
26
|
Yamauchi K, Tsujimoto A, Jurado CA, Shimatani Y, Nagura Y, Takamizawa T, Barkmeier WW, Latta MA, Miyazaki M. Etch-and-rinse vs self-etch mode for dentin bonding effectiveness of universal adhesives. J Oral Sci 2019; 61:549-553. [PMID: 31631096 DOI: 10.2334/josnusd.18-0433] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [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: 11/01/2022]
Abstract
In this study, dentin bond fatigue resistance and interfacial science characteristics of universal adhesives through etch-and-rinse and self-etch modes were investigated. Resin composite was bonded to human dentin with four universal adhesives, namely, Adhese Universal, All-Bond Universal, G-Premio Bond, and Scotchbond Universal Adhesive. The initial bond strengths, bond fatigue strengths, and interfacial science characteristics of the universal adhesives with dentin through etch-and-rinse and self-etch modes were determined. Bond fatigue resistance (initial bond strength and bond fatigue strength) of universal adhesives in etch-and-rinse mode showed no significant difference in contrast to that in self-etch mode and was material-dependent regardless of the etching mode. Although phosphoric acid conditioning of dentin did not have a strong impact on the bond fatigue resistance, surface free energy and parameters of dentin were significantly decreased by etching and by application of universal adhesives regardless of etching mode. Changes in γS and γSh for when universal adhesive was applied to etched and ground dentin were significantly different depending on the adhesive. The results suggest that bonding performance of universal adhesives was effective in both etching modes; however, bonding mechanisms may be different for each.
Collapse
Affiliation(s)
- Kabun Yamauchi
- Department of Operative Dentistry, Nihon University School of Dentistry
| | - Akimasa Tsujimoto
- Department of Operative Dentistry, Nihon University School of Dentistry
| | - Carlos A Jurado
- Department of Restorative Dentistry, Oregon Health and Science University School of Dentistry.,Department of Digital Dentistry, A.T. Still University Arizona School of Dentistry
| | - Yusuke Shimatani
- Department of Operative Dentistry, Nihon University School of Dentistry
| | - Yuko Nagura
- Department of Operative Dentistry, Nihon University School of Dentistry
| | | | - Wayne W Barkmeier
- Department of General Dentistry, Creighton University School of Dentistry
| | - Mark A Latta
- Department of General Dentistry, Creighton University School of Dentistry
| | - Masashi Miyazaki
- Department of Operative Dentistry, Nihon University School of Dentistry
| |
Collapse
|
27
|
Abstract
The study aimed to compare the repair bond strength of aged composite and amalgam repaired with resin composite after various mechanical and adhesive surface treatments. Specimens were aged by thermal cycling (10,000 cycles, 5-55°C) and randomly subjected to one of three surface treatments: diamond bur abrasion, aluminum oxide air abrasion, or silica coating. Conventional bonding or a universal adhesive with incorporated silane was applied afterward (each n = 16) and resin composite was attached. In the control groups (each n = 16), resin composite was attached using one of the above adhesives without prior mechanical surface conditioning. After further thermal cycling, the shear bond strength (SBS) and failure modes were assessed. Statistical analyses were performed using ANOVA, Weibull statistics, two sample t-tests, and Chi2-test (P < 0.05). The SBS of the repaired amalgam was significantly lower than that of the composite and mechanical pretreatment significantly increased SBS. The universal adhesive significantly improved the SBS of the repaired amalgam compared to the conventional bonding agent and mechanical pretreatment increased the number of cohesive/mixed failures. Amalgam restorations may be repaired using resin composites, but the resulting SBS is lower than that obtained with composite.
Collapse
Affiliation(s)
- Philipp Kanzow
- Department of Preventive Dentistry, Periodontology and Cariology, University Medical Center Göttingen
| | - Steffi Baxter
- Department of Preventive Dentistry, Periodontology and Cariology, University Medical Center Göttingen
| | - Marta Rizk
- Department of Preventive Dentistry, Periodontology and Cariology, University Medical Center Göttingen
| | - Torsten Wassmann
- Department of Prosthodontics, University Medical Center Göttingen
| | - Annette Wiegand
- Department of Preventive Dentistry, Periodontology and Cariology, University Medical Center Göttingen
| |
Collapse
|
28
|
Abstract
To improve patient dental care, it is necessary to identify possible risk factors for the failing of restorations. This practice-based cohort study investigated the performance and influence of possible risk factors at the level of the practice, patient, tooth, and restoration on survival of direct class II restorations. Electronic patient files from 11 Dutch general practices were collected, and 31,472 restorations placed between January 2015 and October 2017 were analyzed. Kaplan-Meier statistics were performed; annual failure rates (AFRs) were calculated; and variables were assessed by multivariable Cox regression analysis. The observation time of restorations varied from 0 to 2.7 y, resulting in a mean AFR of 7.8% at 2 y. However, wide variation in AFRs existed among the operators, varying between 3.6% and 11.4%. A wide range of patient-related variables is related to a high risk for reintervention: patient age (elderly: hazard ratio [HR], 1.372), general health (medically compromised: HR, 1.478), periodontal status (periodontal problems: HR, 1.207), caries risk and risk for parafunctional habits (high: HR, 1.687), restorations in molar teeth (HR, 1.383), restorations placed in endodontically treated teeth (HR, 1.890), and multisurface restorations (≥4 surfaces: HR, 1.345). Restorations placed due to fracture were more prone to fail than restorations placed due to caries. When patient-related risk factors were excluded, remaining risk factors considerably changed in their effect and significance: the effect of operator, age of the patient, and endodontic treatment increased; the effect of the diagnosis decreased; and the socioeconomic status became significant (high: HR, 0.873). This study demonstrated that a wide variation of risk factors on the practice, patient, and tooth levels influences the survival of class II restorations. To provide personalized dental care, it is important to identify and record potential risk factors. Therefore, we recommend further clinical studies to include these patient risk factors in data collection and analysis.
Collapse
Affiliation(s)
- M Laske
- 1 Department of Dentistry, Radboud Institute for Health Sciences, Radboud University Medical Centre, Nijmegen, the Netherlands
| | - N J M Opdam
- 1 Department of Dentistry, Radboud Institute for Health Sciences, Radboud University Medical Centre, Nijmegen, the Netherlands
| | - E M Bronkhorst
- 1 Department of Dentistry, Radboud Institute for Health Sciences, Radboud University Medical Centre, Nijmegen, the Netherlands
| | - J C C Braspenning
- 1 Department of Dentistry, Radboud Institute for Health Sciences, Radboud University Medical Centre, Nijmegen, the Netherlands
| | - M C D N J M Huysmans
- 1 Department of Dentistry, Radboud Institute for Health Sciences, Radboud University Medical Centre, Nijmegen, the Netherlands
| |
Collapse
|
29
|
Zanetti F, Zhao X, Pan J, Peitsch MC, Hoeng J, Ren Y. Effects of cigarette smoke and tobacco heating aerosol on color stability of dental enamel, dentin, and composite resin restorations. Quintessence Int 2019; 50:156-166. [PMID: 30564805 DOI: 10.3290/j.qi.a41601] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
OBJECTIVES To test if cigarette smoke (CS) causes discoloration of enamel, dentin, and composite resin restorations and induces color mismatch between dental hard tissues and the restorations, and to compare the findings with the effects of aerosol generated by the tobacco heating system (THS) 2.2. METHOD AND MATERIALS Twenty-two human premolars were prepared with Class V cavities restored with Filtek Supreme Ultra (3M Espe) composite resin. Teeth were divided into two groups and exposed to either CS from 20 reference cigarettes (3R4F) or aerosol from 20 THS 2.2 tobacco heat sticks 4 days a week for 3 weeks. CIE L*a*b* color was assessed before and after exposure and brushing at 1, 2, and 3 weeks. Color match, marginal discoloration, marginal integrity, and surface texture of the Class V restoration were assessed according to a modified US Public Health Service (USPHS) criterion. RESULTS Marked discoloration of enamel and dentin was observed following 3 weeks of CS exposure (ΔE = 8.8 ± 2.6 and 21.3 ± 4.4, respectively), and color mismatch occurred between the composite resin restorations (ΔE = 25.6 ± 3.8) and dental hard tissues. Discoloration was minimal in the enamel, dentin, and composite resin restorations in the THS 2.2 group, and no color mismatch was observed after 3 weeks of THS 2.2 aerosol exposure. CONCLUSION CS causes significant tooth discoloration and induces color mismatch between dental hard tissues and composite resin restorations. Reducing or eliminating the deposits derived from tobacco combustion could minimize the impact of tobacco products on tooth discoloration.
Collapse
|
30
|
Tsujimoto A, Shimatani Y, Nojiri K, Barkmeier WW, Markham MD, Takamizawa T, Latta MA, Miyazaki M. Influence of surface wetness on bonding effectiveness of universal adhesives in etch-and-rinse mode. Eur J Oral Sci 2018; 127:162-169. [PMID: 30536451 DOI: 10.1111/eos.12596] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The purpose of this study was to evaluate whether surface wetness would influence the bonding effectiveness of universal adhesives in etch-and-rinse mode. All-Bond Universal (AB), G-Premio Bond (GP), Prime & Bond Active (PB), and Scotchbond Universal Adhesive (SU) were evaluated. Initial bond strengths and bond-fatigue strengths of universal adhesives to both wet and dry enamel and dentin in etch-and-rinse mode were determined. Scanning electron microscopy observations of the adhesive interfaces were also conducted. The bond-fatigue durability of universal adhesive to enamel in etch-and-rinse mode was influenced by the surface wetness, unlike that to dentin. The bond fatigue durability of AB and GP to dentin in etch-and-rinse mode was different depending on the surface wetness, unlike that of PB and SU. The thicknesses of the adhesive or hybrid layer of resin-dentin interfaces were not influenced by the surface wetness, but the length of resin tags in the wet group was longer than in the dry group. Some universal adhesives with the addition of specific components and optimization of water content can achieve stable bonds regardless of surface wetness, but the surface wetness of dentin is still a significant factor for universal adhesive bonding in etch-and rinse mode, unlike that of enamel.
Collapse
Affiliation(s)
- Akimasa Tsujimoto
- Department of Operative Dentistry, Nihon University School of Dentistry, Tokyo, Japan
| | - Yusuke Shimatani
- Department of Operative Dentistry, Nihon University School of Dentistry, Tokyo, Japan
| | - Kie Nojiri
- Department of Operative Dentistry, Nihon University School of Dentistry, Tokyo, Japan
| | - Wayne W Barkmeier
- Department of General Dentistry, Creighton University School of Dentistry, Omaha, NE, USA
| | - Mark D Markham
- Department of General Dentistry, Creighton University School of Dentistry, Omaha, NE, USA
| | - Toshiki Takamizawa
- Department of Operative Dentistry, Nihon University School of Dentistry, Tokyo, Japan
| | - Mark A Latta
- Department of General Dentistry, Creighton University School of Dentistry, Omaha, NE, USA
| | - Masashi Miyazaki
- Department of Operative Dentistry, Nihon University School of Dentistry, Tokyo, Japan
| |
Collapse
|
31
|
Abstract
AIM To assess factors influencing anterior dental restoration longevity among the institutionalized elderly. METHODS Among a sample of Eastern Iowa nursing facility dental patients, one anterior restoration placed from 1985 to 2014 was selected at random from each subject. Kaplan-Meier survival curves were generated, with restoration failures defined as subsequent restorative codes involving the same surface; endodontic procedures; or extractions. Bivariate and multivariable Cox proportional hazards modeling were performed. RESULTS In multivariable analyses, the 1985 to 1999 cohort (n = 496) had longer restoration survival in in females < 75 years old versus males < 75 years old (P = 0.016), males ≥75 years old (P = 0.026) and females ≥75 years old (P = 0.030); one- versus three-surface restorations (P < 0.001); and restorations placed by faculty/residents versus pre-doctoral students (P = 0.009). The 2000 to 2014 cohort (n = 521) had longer restoration survival in females < 75 years old versus males ≥75 years old (P = 0.012) and females ≥75 years old (P = 0.019); residents who paid out-of-pocket versus those on Medicaid (P = 0.019); and composite resin versus glass ionomer cement restorations (P < 0.001). CONCLUSIONS Knowing how long restorations last, and what factors affect their longevity, could improve treatment planning, informed consent, and communication with residents and caregivers, and also help inform practice guidelines for restorative care among the institutionalized elderly.
Collapse
Affiliation(s)
- Tariq S Ghazal
- Adjunct Clinical Assistant Professor, Department of Preventive and Community Dentistry, College of Dentistry, University of Iowa, Iowa City, Iowa
| | - Howard J Cowen
- Clinical Professor, Department of Preventive and Community Dentistry, College of Dentistry, University of Iowa, Iowa City, Iowa
| | - Daniel J Caplan
- Professor and Chair, Department of Preventive and Community Dentistry, College of Dentistry, University of Iowa, Iowa City, Iowa
| |
Collapse
|
32
|
Abstract
Florid cemento-osseus dysplasia (FCOD) has been described as a reactive process in which normal bone is replaced by fibrous connective tissues and cementum-like materials. Radiographically it appears as dense, lobulated masses, often occurring bilaterally with symmetric involvement. In this case report, a successful implant placement has been reported in a 62-year-old Caucasian woman with a chief complaint of mandibular partial edentulous. Radiographic images showed the bilateral radiopaque lesions in edentulous regions of mandible, and mandibular anterior teeth alike. All mandibular teeth were vital and no root resorption was detected. The findings of X-ray images were attributable to FCOD. A highly conservative step-by-step 2-stage implant surgery was performed. After 6 months the implants loaded with fixed prosthesis. 2, 4, 6, 12, and 18 months after the surgery radiographic images were taken, which revealed an optimal functional rehabilitation and complete integration of implants. This report confirms that treating the edentulous area near the FCOD lesions could be planned, if conservative step- by-step implant placement been considered. To the best of our knowledge, a case of FCOD with successful implant placement has not been reported previously. More studies in more patients are needed to confirm results of such a therapeutic modality.
Collapse
Affiliation(s)
- Nasrin Esfahanizadeh
- 1 Department of Periodontics, Dental Branch, Islamic Azad University, Tehran, Iran.,2 Dental Implant Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Hila Yousefi
- 3 Toxicology and Diseases Group, Pharmaceutical Sciences Research Center, Tehran University of Medical Sciences, Tehran, Iran
| |
Collapse
|
33
|
Riley JL, Gilbert GH, Ford GW, Fellows JL, Rindal B, Gordan VV. Judgment of the Quality of Restorative Care as Predictors of Restoration Retreatment: Findings from the National Dental PBRN. JDR Clin Trans Res 2017; 2:151-157. [PMID: 28529977 DOI: 10.1177/2380084416675838] [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: 11/17/2022] Open
Abstract
The primary aim of this study was to test the hypothesis that a patient's subjective assessments of the dentist's technical competence, quality of care, and anticipated restoration longevity during a restorative visit are predictive of restoration outcome. This prospective cohort study involved 3,326 patients who received treatment for a defective restoration in a permanent tooth, participated in a baseline patient satisfaction survey, and returned for follow-up. Of the 4,400 restorations that were examined by 150 dentists, 266 (6%) received additional treatment after baseline. Reporting satisfaction with the technical skill of the dentist or quality of the dental work at baseline was not associated with retreatment after baseline. However, patients' views at baseline that the fee was reasonable (odds ratio [OR], 1.6) was associated with retreatment after baseline, whereas satisfaction at baseline with how long the filling would last (OR, 0.6) was associated with less retreatment. These findings suggest that retreatment occurs more often for patients who at baseline are satisfied with the cost or who at baseline have less confidence in the restoration. The authors found no associations between restoration retreatment and the patients' baseline evaluations of the technical skills of their dentists or perceptions of quality care. KNOWLEDGE TRANSFER STATEMENT Dental patients' ratings of their dentist's skills were not related to a restoration needing retreatment. Patients focus on other aspects of the dental visit when making this judgment.
Collapse
Affiliation(s)
- J L Riley
- Department of Community Dentistry and Behavioral Sciences, University of Florida College of Dentistry, Gainesville, FL, USA
| | - G H Gilbert
- Department of Clinical and Community Sciences, School of Dentistry, University of Alabama at Birmingham, Birmingham, AL, USA
| | - G W Ford
- Private dental practice, Atlanta, GA
| | - J L Fellows
- Center for Health Research, Kaiser Permanente Northwest, Portland, OR, USA
| | - B Rindal
- HealthPartners, Minneapolis, MN, USA
| | - V V Gordan
- Department of Restorative Dental Sciences, Operative Dentistry Division, University of Florida College of Dentistry, Gainesville, FL, USA
| | | |
Collapse
|
34
|
Dias MCR, Martins JNR, Chen A, Quaresma SA, Luís H, Caramês J. Prognosis of Indirect Composite Resin Cuspal Coverage on Endodontically Treated Premolars and Molars: An In Vivo Prospective Study. J Prosthodont 2016; 27:598-604. [PMID: 27662604 DOI: 10.1111/jopr.12545] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/02/2016] [Indexed: 11/30/2022] Open
Abstract
PURPOSE This prospective clinical study evaluated the success rate of indirect composite resin cuspal coverage on endodontically treated molars and premolars and the survival rate of the restored teeth. MATERIALS AND METHODS One hundred fifty endodontically treated teeth were restored with total resin cuspal coverage and randomly selected for the study. Patients were recalled after 2 to 5 years for clinical evaluation. Data were subjected to standard tests of statistical correlations using Spearman test. RESULTS Out of the 150 teeth, 84 were molars and 66 were premolars. Of these teeth, 58.7% had mesio-occlusal-distal (MOD) cavities, 20.7% had mesio-occlusal (MO), and 20.7% had occlusal-distal (OD). A build-up procedure was performed in 51.3% of the teeth, and buccal veneer composite resins were placed at the margins of 96.7% of the teeth. Out of the 150 teeth, 30 (20%) presented margin discoloration, 3 teeth (2%) had restoration reparable fractures, 2 teeth (1.3%) had restoration irreparable fractures, and 1 tooth (0.7%) exhibited secondary recurrent caries. The opposing arch that occluded with the treated teeth presented 58% natural teeth (no restoration material), 26.7% ceramic crowns, and 15.3% implant-supported ceramic crowns. Statistically significant differences (p = 0.018) between irreparable restoration fractures and the type of support material present in the opposing arch were found. CONCLUSIONS In a period of up to 5 years, the resin cuspal coverage of endodontic treated teeth had a success rate of 96%, while the tooth survival rate was 100%. The type of support material on the opposing arch may influence the longevity of the restoration of endodontically treated teeth.
Collapse
Affiliation(s)
- Maria Carlos Real Dias
- Clinical Assistant Faculty, Occlusion and Oral Rehabilitation, Lisbon University, School of Dental Medicine, Lisbon, Portugal
| | | | - André Chen
- Clinical Assistant Faculty, Implant Dentistry, Lisbon University, School of Dental Medicine, Lisbon, Portugal
| | - Sérgio André Quaresma
- Assistant Professor of the Master of Endodontics, International University of Catalunya, Barcelona, Spain
| | - Henrique Luís
- Professor of Statistics and Probabilities, University of Lisbon Dental School, Lisbon, Portugal
| | - João Caramês
- Full Professor and Chairman of the Implantology Department, Lisbon University, School of Dental Medicine, Lisbon, Portugal
| |
Collapse
|
35
|
Morimoto S, Rebello de Sampaio FBW, Braga MM, Sesma N, Özcan M. Survival Rate of Resin and Ceramic Inlays, Onlays, and Overlays: A Systematic Review and Meta-analysis. J Dent Res 2016; 95:985-94. [PMID: 27287305 DOI: 10.1177/0022034516652848] [Citation(s) in RCA: 125] [Impact Index Per Article: 15.6] [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: 11/15/2022] Open
Abstract
This systematic review and meta-analysis aimed to evaluate the survival rate of ceramic and resin inlays, onlays, and overlays and to identify the complication types associated with the main clinical outcomes. Two reviewers searched PubMed, EMBASE, and the Cochrane Central Register of Controlled Trials for articles published between 1983 through April 2015, conforming to Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines for systematic reviews. Clinical studies meeting the following criteria were included: 1) studies related to resin and ceramic inlays, onlays, and overlays; 2) prospective, retrospective, or randomized controlled trials conducted in humans; 3) studies with a dropout rate of less than 30%; and 4) studies with a follow-up longer than 5 y. Of 1,389 articles, 14 met the inclusion criteria. The meta-regression indicated that the type of ceramic material (feldspathic porcelain vs. glass-ceramic), study design (retrospective vs. prospective), follow-up time (5 vs. 10 y), and study setting (university vs. private clinic) did not affect the survival rate. Estimated survival rates for glass-ceramics and feldspathic porcelain were between 92% and 95% at 5 y (n = 5,811 restorations) and were 91% at 10 y (n = 2,154 restorations). Failures were related to fractures/chipping (4%), followed by endodontic complications (3%), secondary caries (1%), debonding (1%), and severe marginal staining (0%). Odds ratios (95% confidence intervals) were 0.19 (0.04 to 0.96) and 0.54 (0.17 to 1.69) for pulp vitality and type of tooth involved (premolars vs. molars), respectively. Ceramic inlays, onlays, and overlays showed high survival rates at 5 y and 10 y, and fractures were the most frequent cause of failure.
Collapse
Affiliation(s)
- Susana Morimoto
- School of Dentistry, Ibirapuera University, São Paulo, Brazil
| | | | - M M Braga
- Department of Orthodontics and Pediatric Dentistry, School of Dentistry, University of São Paulo, São Paulo, Brazil
| | - N Sesma
- Department of Prosthodontics, School of Dentistry, University of São Paulo, São Paulo, Brazil
| | - M Özcan
- Center for Dental and Oral Medicine, Dental Materials Unit, Clinic for Fixed and Removable Prosthodontics and Dental Materials Science, University of Zurich, Zurich, Switzerland
| |
Collapse
|
36
|
Belli R, Petschelt A, Hofner B, Hajtó J, Scherrer SS, Lohbauer U. Fracture Rates and Lifetime Estimations of CAD/CAM All-ceramic Restorations. J Dent Res 2015; 95:67-73. [PMID: 26428908 DOI: 10.1177/0022034515608187] [Citation(s) in RCA: 79] [Impact Index Per Article: 8.8] [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: 11/17/2022] Open
Abstract
The gathering of clinical data on fractures of dental restorations through prospective clinical trials is a labor- and time-consuming enterprise. Here, we propose an unconventional approach for collecting large datasets, from which clinical information on indirect restorations can be retrospectively analyzed. The authors accessed the database of an industry-scale machining center in Germany and obtained information on 34,911 computer-aided design (CAD)/computer-aided manufacturing (CAM) all-ceramic posterior restorations. The fractures of bridges, crowns, onlays, and inlays fabricated from different all-ceramic systems over a period of 3.5 y were reported by dentists and entered in the database. Survival analyses and estimations of future life revealed differences in performance among ZrO2-based restorations and lithium disilicate and leucite-reinforced glass-ceramics.
Collapse
Affiliation(s)
- R Belli
- Research Laboratory for Dental Biomaterials, Dental Clinic 1-Operative Dentistry and Periodontology, Universitätsklinikum Erlangen, Friedrich-Alexander Universität Erlangen-Nürnberg, Erlangen, Germany
| | - A Petschelt
- Research Laboratory for Dental Biomaterials, Dental Clinic 1-Operative Dentistry and Periodontology, Universitätsklinikum Erlangen, Friedrich-Alexander Universität Erlangen-Nürnberg, Erlangen, Germany
| | - B Hofner
- Department of Medical Informatics, Biometry and Epidemiology, Friedrich-Alexander Universität Erlangen-Nürnberg, Erlangen, Germany
| | - J Hajtó
- Clinical Practice, Munich, Germany
| | - S S Scherrer
- Division of Fixed Prosthodontics-Biomaterials, University Clinics of Dental Medicine, University of Geneva, Geneva, Switzerland
| | - U Lohbauer
- Research Laboratory for Dental Biomaterials, Dental Clinic 1-Operative Dentistry and Periodontology, Universitätsklinikum Erlangen, Friedrich-Alexander Universität Erlangen-Nürnberg, Erlangen, Germany
| |
Collapse
|
37
|
Abstract
OBJECTIVE The aim of this study was to evaluate clinical success of primary teeth class II lesions restored with different restorative materials [Hybrid Composite Resin (HCR), Resin Modified Glass Ionomer Cement (RMGIC), compomer, and Giomer Composite Resin (GCR)] followed up for 24 months. STUDY DESIGN This study was carried out on 146 primary molars of 41 children in the age range of 5-7 years. The class II lesions in primary molars of a patient were restored using different restorative materials. Restorations were evaluated according to FDI-criteria and their survival rates were determined. Data were analysed with Pearson chi-square, Kaplan-Meier and Wilcoxon (Breslow) tests (α = 0.05). RESULTS The failure rates of restorative materials were as follows: compomer 33.3%, RMGIC 28.1%, HCR 22.5% and GCR 21.1%. CONCLUSIONS While the functional failure was the most important factor in restorative material failure, RMGIC was the most successful material in terms of biological evaluation criterion and GCR had the longest survival rate.
Collapse
|
38
|
Abstract
For shallow or moderately deep pit-and-fissure lesions, various treatment options are available: (1) noninvasive treatments (e.g., fluoride application, antibacterial treatments, oral hygiene advice) avoid any dental hard tissue removal; (2) microinvasive treatments (e.g., sealing) remove only a few micrometers of hard tissues by etching; and minimally invasive methods (e.g., "preventive" resin/sealant restoration) remove carious dentin but avoid sacrificing sound tissues. We aimed at systematically reviewing and comparing these strategies for treating pit-and-fissure lesions in permanent teeth using network meta-analysis. Randomized or nonrandomized clinical trials investigating shallow or moderately deep primary caries lesions in fissured or pitted surfaces were included. We compared the risk of requiring invasive treatments or any retreatments in noninvasive, microinvasive, and minimally invasive treated lesions; untreated lesions were used as controls. Five electronic databases were systematically screened up to September 2013 and cross-referencing performed. Pairwise and network meta-analyses were performed and odds ratios and 95% confidence intervals (CI) calculated. Certainty of estimates was evaluated via GRADE criteria. From a total of 2,214 identified records, 14 studies representing 1,440 patients with 3,551 treated lesions were included. Pairwise meta-analysis found microinvasive and minimally invasive treated lesions to require less invasive retreatments than control lesions (odds ratios [95% confidence intervals]: 0.13 [0.07 to 0.26], 0.13 [0.03 to 0.50], respectively), whereas the estimate for noninvasively treated lesions remained nonsignificant (0.64 [0.39 to 1.06]). These findings were reflected in the strategy ranking stemming from network meta-analysis (first, minimally invasive; second, microinvasive; third, noninvasive). However, microinvasive treatment required significantly more total retreatments (including resealing) than minimally or noninvasive treatments. Due to limited study quality, the evidence was graded as low or very low. Clinical treatment decisions should consider the long-term sequelae and costs stemming from different therapies as well as their subjective impact on the patient. Available treatment options seem suitable for treating shallow or moderately deep pit-and-fissure lesions in permanent teeth; further conclusions are not possible.
Collapse
Affiliation(s)
- F Schwendicke
- Department of Operative and Preventive Dentistry, Charité-Universitätsmedizin Berlin, Germany
| | - A M Jäger
- Department of Operative and Preventive Dentistry, Charité-Universitätsmedizin Berlin, Germany
| | - S Paris
- Department of Operative and Preventive Dentistry, Charité-Universitätsmedizin Berlin, Germany
| | - L Y Hsu
- Institute of Epidemiology and Preventive Medicine, College of Public Health, National Taiwan University, Taipei, Taiwan
| | - Y K Tu
- Institute of Epidemiology and Preventive Medicine, College of Public Health, National Taiwan University, Taipei, Taiwan
| |
Collapse
|
39
|
Abstract
Dental implants made of titanium for replacement of missing teeth are widely used because of ease of technical procedure and high success rate, but are not free of complications and may fail. Fracturing of the prosthetic screw continues to be a problem in restorative practice and great challenge to remove the fractured screw conservatively. This case report describes and demonstrates the technique of using an ultrasonic scaler in the removal of the fracture screw fragment as a noninvasive method without damaging the hex of implants.
Collapse
Affiliation(s)
- Jagadish Reddy Gooty
- Department of Periodontics and Implantology, Kamineni Institute of Dental Sciences, Narketpally, Andhra Pradesh, India
| | - Sunil Kumar Palakuru
- Department of Periodontics and Implantology, Kamineni Institute of Dental Sciences, Narketpally, Andhra Pradesh, India
| | - Vikram Reddy Guntakalla
- Department of Periodontics and Implantology, Kamineni Institute of Dental Sciences, Narketpally, Andhra Pradesh, India
| | - Mahipal Nera
- Department of Periodontics and Implantology, Kamineni Institute of Dental Sciences, Narketpally, Andhra Pradesh, India
| |
Collapse
|
40
|
Abstract
BACKGROUND Insufficient bone volume is a common problem encountered in the rehabilitation of the edentulous posterior maxillae with implant-supported prostheses. Bone volume is limited by the presence of the maxillary sinus together with loss of alveolar bone height. Sinus lift procedures increase bone volume by augmenting the sinus cavity with autogenous bone or commercially available biomaterials, or both. This is an update of a Cochrane review first published in 2010. OBJECTIVES To assess the beneficial or harmful effects of bone augmentation compared to no augmentation when undertaking a sinus lift procedure. Secondly, to compare the benefits and harms of different maxillary sinus lift techniques for dental implant rehabilitation. SEARCH METHODS We searched the Cochrane Oral Health Group's Trials Register (to 17 January 2014), the Cochrane Central Register of Controlled Trials (CENTRAL) (The Cochrane Library 2013, Issue 12), MEDLINE via OVID (1946 to 17 January 2014) and EMBASE via OVID (1980 to 17 January 2014). There were no language or date restrictions on the searches of the electronic databases. SELECTION CRITERIA Randomised controlled trials (RCTs) of different techniques and materials for augmenting the maxillary sinus for rehabilitation with dental implants that report the outcome of implant success or failure at least to four months after initial loading. DATA COLLECTION AND ANALYSIS Screening of eligible studies, assessment of the risk of bias of the trials, and data extraction were conducted independently and in duplicate. Authors were contacted for any missing information. Results were expressed using fixed-effect models as there were either less than four studies or we used Peto odds ratios (ORs) for dichotomous data when there were zero cells in either the treatment or control or both arms and the number of trials was small. The statistical unit of the analysis was the patient. MAIN RESULTS Eighteen RCTs out of 64 potentially eligible study reports met the inclusion criteria. They compared undertaking a sinus lift with not doing so, and the use of different sinus lift techniques. There were 650 patients providing data for the outcomes evaluated. Five studies were assessed as low risk of bias, 11 were assessed as high risk of bias, and in two the risk was unclear. Sinus lift versus no sinus lift Four trials of moderate quality (three trials at low and one at high risk of bias) with 102 participants evaluated short implants (5 to 8.5 mm long) as an alternative to sinus lift in bone with residual height between 4 and 9 mm. One year after loading there was insufficient evidence to claim differences between the two procedures for prosthesis failure (OR (Peto) 0.37, 95% confidence interval (CI) 0.05 to 2.68; three trials) or implant failure (OR (Peto) 0.44, 95% CI 0.10 to 1.99; four trials). There was however an increase in complications at treated sites when undertaking the sinus lift (OR (Peto) 4.77, 95% CI 1.79 to 12.71, P value = 0.002; four trials). Different sinus lift techniques Fourteen trials with 548 participants compared different sinus lift techniques. Only three comparisons included more than one trial (two trials for each). These were bone graft versus no bone graft, autogenous bone versus bone substitute, bone graft with or without platelet-rich plasma (PRP). There was insufficient evidence to claim a benefit for any of these techniques for the primary outcomes of prosthesis and implant failure. For the other reported outcomes, in a single study at high risk of bias, only bone gain was greater for the bone graft site than the site without a graft six months after augmentation, however this was not significant at 18 or 30 months.The other comparisons with single studies were rotary versus piezosurgery to open a lateral sinus window, two different bone substitutes, use or not of a membrane to seal the lateral window, one- versus two-stage lateral sinus lift, two-stage granular bone versus one-stage autogenous bone blocks, and crestal versus lateral sinus lift; two trials compared three different crestal sinus lifting techniques: rotatory versus hand malleting (patients preferred rotatory instruments over hand malleting) and hand versus electric malleting. There was no evidence of a benefit for any sinus lift procedure compared to any other for the primary outcomes prosthesis or implant failure. AUTHORS' CONCLUSIONS There is moderate quality evidence which is insufficient to determine whether sinus lift procedures in bone with residual height between 4 and 9 mm are more or less successful than placing short implants (5 to 8.5 mm) in reducing prosthesis or implant failure up to one year after loading. However, there are more complications at sites treated with sinus lift procedures. Many trials compared different sinus lift procedures and none of these indicated that one procedure reduced prosthetic or implant failures when compared to the other. Based on low quality evidence, patients may prefer rotary instruments over hand malleting for crestal sinus lift.
Collapse
Affiliation(s)
- Marco Esposito
- School of Dentistry, The University of ManchesterCochrane Oral Health GroupCoupland 3 Building, Oxford RoadManchesterUKM13 9PL
| | - Pietro Felice
- University of BolognaDepartment of Oral and Dental SciencesVia San Vitale 59BolognaItaly40125
| | - Helen V Worthington
- School of Dentistry, The University of ManchesterCochrane Oral Health GroupCoupland 3 Building, Oxford RoadManchesterUKM13 9PL
| | | |
Collapse
|
41
|
de Almeida AA, Munoz Chavez OF, Galvao BR, Adabo GL. Clinical fractures of veneered zirconia single crowns. Gen Dent 2013; 61:e17-e21. [PMID: 24064171] [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: 06/02/2023]
Abstract
Crowns made from an yttria-stabilized tetragonal zirconia polycrystals (3Y-TZP) core with a porcelain veneer have shown high clinical failure rates. Manifestations of clinical failure in veneering ceramic ranges from a single chip to an extended fracture. Core failures are uncommon but usually are catastrophic. This article examines the possible causes of failure in zirconia systems and presents a case report involving the diagnosis and repair of three different types of failure in six 3Y-TZP/porcelain crowns.
Collapse
|
42
|
Purk JH, Dusevich V, Glaros A, Eick JD. Adhesive analysis of voids in Class II composite resin restorations at the axial and gingival cavity walls restored under in vivo versus in vitro conditions. Dent Mater 2007; 23:871-7. [PMID: 16950506 PMCID: PMC1909915 DOI: 10.1016/j.dental.2006.07.001] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.7] [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: 11/04/2005] [Revised: 06/15/2006] [Accepted: 07/07/2006] [Indexed: 11/28/2022]
Abstract
OBJECTIVES Adhesive analysis, under the scanning electron microscope of microtensile specimens that failed through the adhesive interface, was conducted to evaluate the amount of voids present at the axial versus gingival cavity walls of class II composite restorations restored under in vivo and in vitro conditions. METHODS Five patients received class II resin composite restorations, under in vivo and in vitro conditions. A total of 14 premolar teeth yielded 59 (n=59) microtensile adhesive specimens that fractured through the adhesive interface. The fractured surfaces of all specimens were examined and the % area of voids was measured. RESULTS Voids at the adhesive joint were highly predictive of bond strengths. An increase in the number of voids resulted in a decrease in the microtensile bond strength. The area of voids at the adhesive interface was as follows: in vivo axial 13.6+/-25.6% (n=12); in vivo gingival 48.8+/-29.2% (n=12); in vitro axial 0.0+/-0.0% (n=19) and in vitro gingival 11.7+/-17.6% (n=16). SIGNIFICANCE Composite resin may bond differently to dentin depending upon the amount of voids and the cavity wall involved. The bond to the gingival wall was not as reliable as the bond to the axial wall. An increase in the amount of surface voids was a major factor for reducing microtensile bond strengths of adhesive to dentin.
Collapse
Affiliation(s)
- John H Purk
- Department of Restorative Dentistry, University of Missouri-Kansas City, School of Dentistry, 650 East 25th Street, Kansas City, MO 64108, USA.
| | | | | | | |
Collapse
|