Comparison of the outcomes and complications of three-unit porcelain-fused-to-metal tooth-implant-supported prostheses with implant-supported prostheses: A systematic review and meta-analysis

Fathi, Amirhossein; Atash, Ramin; Fardi, Elmira; Ahmadabadi, MahsaNili; Hashemi, Seyedeh‐Sara

doi:10.4103/1735-3327.367902

Cited by 8 publications

(15 citation statements)

References 16 publications

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“…Tus, this value was considered as the optimal number of elements for meshing. 1 presents the mechanical properties of the materials used in this study according to the available literature [2,28].…”

Section: Sensitivity Analysis Of Meshingmentioning

confidence: 99%

“…Rigid connectors (RCs) are commonly used for FPDs [1]. When occlusal loads are applied to the connectors, the pier abutment can serve as a support, and result in debonding of the terminal abutment with lower retention, leading to restoration fracture and treatment failure [2]. Tus, FPDs with RCs may not be an appropriate treatment option for the replacement of two lost teeth with one pier abutment, because Te amount of load applied to the anterior part may be diferent from the posterior part, causing the destruction of the prosthesis, tooth decay, pulp irritation, and ultimately the need for root canal treatment, causing prolonged pain and discomfort to the patient [4][5][6][7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

“…Considering the high prevalence of partial and complete edentulism in adults, replacement of the lost teeth is a common task for dental clinicians [ 1 ]. Some partially edentulous patients require the replacement of the lost teeth with fixed partial dentures (FPDs) with a pier abutment [ 2 ]. A Pier abutment is a natural tooth located between two edentulous spaces and terminal abutments, which supports an FPD.…”

Section: Introductionmentioning

confidence: 99%

“…Also, failure may occur due to differences in the physiological mobility of the teeth in the anterior and posterior regions [ 13 ]. Thus, nonrigid connectors (NRCs) have been proposed to decrease the risk of failure [ 2 , 14 ]. NRCs transfer stress to the supporting bone instead of its concentration in the connector [ 15 ].…”

Section: Introductionmentioning

confidence: 99%

“…Clinical assessment of stress concentrated in prosthetic components or transferred to the supporting tissue is almost impossible. However, since the success of prosthetic restorations is influenced by biomechanical properties, measurement of these stresses is critical [ 2 , 20 ]. Photo-elastic models are important tools for the assessment of stress distribution in different systems.…”

Section: Introductionmentioning

confidence: 99%

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Stress Distribution in 5-Unit Fixed Partial Dentures with a Pier Abutment and Rigid and Nonrigid Connectors with Two Different Occlusal Schemes: A Three-Dimensional Finite Element Analysis

Ebadian

Fathi

Tabatabaei

2023

International Journal of Dentistry

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Objectives. This study aimed to assess stress distribution in 5-unit fixed partial dentures (FPDs) with a pier abutment and rigid (RC) and nonrigid connectors (NRCs) with the canine rise and group function occlusal schemes by finite element analysis (FEA). Materials and Methods. In this FEA study, a geometrical model of the maxilla with natural teeth and periodontal ligament (PDL) was three-dimensionally designed and meshed by ANSYS and Pro/Engineer software programs. A 5-unit FPD was then designed to replace the lost first premolar and first molar teeth; the second premolar served as a pier abutment, and the canine and second molar served as terminal abutments. Two FPDs were designed with RC and NRC. Each FPD was analyzed with the canine rise and group function occlusal schemes (a total of 4 models). The first and second molars (180 N), premolars (120 N), and canine (80 N) teeth were subjected to progressive vertical and oblique (12-degree) loads, and maximum von Mises stress and strain in teeth and connectors were calculated for each model. Results. The models had 73704 elements and 137732 nodes. The connector design and occlusal scheme had significant effects on stress distribution in FPDs. The highest von Mises stress (73.035 MPa) was recorded in FPD with RC and group function occlusal scheme. The lowest von Mises stress (0.004 MPa) was recorded in FPD with NRC and canine rise occlusal scheme. Conclusion. Oblique forces created greater stress, and FPD with NRC and canine rise occlusal scheme decreased stress in FPD and increased stress in the tooth crown.

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Section: Sensitivity Analysis Of Meshingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Stress Distribution in 5-Unit Fixed Partial Dentures with a Pier Abutment and Rigid and Nonrigid Connectors with Two Different Occlusal Schemes: A Three-Dimensional Finite Element Analysis

Ebadian

Fathi

Tabatabaei

2023

International Journal of Dentistry

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Accuracy of tooth‐implant impressions: Comparison of five different techniques

Fathi

Rismanchian

Yazdekhasti

et al. 2023

Clinical & Exp Dental Res

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To compare the accuracy of five different tooth-implant impression techniques. Materials and Methods: In this in vitro, experimental study, an acrylic model containing one bone-level Straumann dental implant at the site of maxillary first molar and an adjacent second premolar prepared for a porcelain fused to metal restoration was used. Impressions were made from the model using five different one-step tooth-implant impression techniques including scanning with an intraoral scanner, occlusal matrix, wax relief, closed-tray, and open-tray techniques. Each technique was repeated 15 times. The impressions were poured with dental stone, and the obtained casts were scanned by a laboratory scanner. The scan file of each technique was compared with the scan file of the original acrylic model by Geomagic Design X software. Data were analyzed by one-way analysis of variance, and Tamhane's post-hoc test (α = 0.05).Results: For dental implant, intraoral scanning had the highest accuracy (0.1004 mm 2 ) followed by open-tray (0.1914 mm 2 ), occlusal matrix (0.2101 mm 2 ), closed-tray (0.2422 mm 2 ), and wax relief (0.2585 mm 2 ) techniques (p < 0.05). For the prepared tooth, wax relief (0.0988 mm 2 ) had the highest accuracy followed by occlusal matrix (0.1211 mm 2 ), open-tray (0.1663 mm 2 ), closed-tray (0.1737 mm 2 ), and intraoral scanning (0.4903 mm 2 ) technique (p < 0.05). For both dental implant and prepared tooth, occlusal matrix (0.2431 mm 2 ) had the highest accuracy followed by open-tray (0.2574 mm 2 ), wax relief (0.2693 mm 2 ), closed-tray (0.2862 mm 2 ), and intraoral scanning (0.3192 mm 2 ) technique (p > 0.05). Conclusion:The compared simultaneous tooth-implant impression techniques had comparable accuracy with no significant difference.

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The Effect of Ferrule/Crown Ratio and Post Length on the Applied Stress and Strain Distribution to the Endodontically Treated Maxillary Central Teeth: A Finite Element Analysis

Mosharaf¹,

Abolhasani²,

Fathi³

et al. 2023

fid

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Objectives: One of the most common methods used for the reconstruction of endodontically treated teeth is post and core and crown. Various factors such as the remaining tissue above the cutting margin (ferrule) affect the fracture resistance of teeth restored with post and core and crown. This study aimed to investigate the effect of ferrule/crown ratio (FCR) on the strength of maxillary anterior central teeth using finite element analysis. Materials and Methods: A 3D scan of a central incisor was obtained, and the data were transferred to Mimics software. Then, a 3D model of the tooth was designed. Next, 300N load was applied at a 135° angle to the tooth model. Force was applied to the model both horizontally and vertically. Ferrule height was considered to be 5%, 10%, 15%, 20%, and 25% in the palatal surface and 50% in the buccal surface. The length of post in the model was 11, 13, and 15mm. Results: By increasing the FCR, stress and strain distribution increased in the dental model and decreased in the post itself. As the horizontal angle of load application increased, the level of stress and strain created in the dental model increased as well. The closer the force application site to the incisal area, the higher the stress and strain would be. Conclusion: Maximum stress was inversely correlated with FCR and post length. In ratios of 20% and higher, insignificant changes occurred in stress and strain patterns in the dental model.

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Comparison of the outcomes and complications of three-unit porcelain-fused-to-metal tooth-implant-supported prostheses with implant-supported prostheses: A systematic review and meta-analysis

Cited by 8 publications

References 16 publications

Stress Distribution in 5-Unit Fixed Partial Dentures with a Pier Abutment and Rigid and Nonrigid Connectors with Two Different Occlusal Schemes: A Three-Dimensional Finite Element Analysis

Stress Distribution in 5-Unit Fixed Partial Dentures with a Pier Abutment and Rigid and Nonrigid Connectors with Two Different Occlusal Schemes: A Three-Dimensional Finite Element Analysis

Accuracy of tooth‐implant impressions: Comparison of five different techniques

The Effect of Ferrule/Crown Ratio and Post Length on the Applied Stress and Strain Distribution to the Endodontically Treated Maxillary Central Teeth: A Finite Element Analysis

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