Mechanical Performance of a Monolithic 3D-Printed Orthodontic Bracket–Crown System: An In-Vitro Study †.
Saved in:
| Title: | Mechanical Performance of a Monolithic 3D-Printed Orthodontic Bracket–Crown System: An In-Vitro Study †. |
|---|---|
| Authors: | Mısır, Selcen Eser1 (AUTHOR) selcen.esermisir@sbu.edu.tr, Görgülü, Serkan1 (AUTHOR), Ayyıldız, Simel1 (AUTHOR), Duran, Gökhan Serhat1 (AUTHOR), Topsakal, Kübra Gülnur1 (AUTHOR) |
| Source: | Materials (1996-1944). Apr2026, Vol. 19 Issue 8, p1584. 14p. |
| Subjects: | Orthodontic appliances, Prosthetics, Rapid prototyping, Design, Three-dimensional printing, Durability, Adhesives, Shear strength |
| Abstract: | Highlights: Monolithic bracket–crown design fabricated using 3D printing. Higher resistance under load than conventionally bonded brackets on crowns and teeth. Enables fully digital, patient-specific workflow. The monolithic design minimizes adhesive-related bonding failures. What are the main findings? A total of 66 specimens were equally distributed between molars (tubes) and premolars (brackets) groups. The monolithic Design Group showed markedly higher resistance values (92.56 MPa). The one-piece structure demonstrated higher resistance under load compared with the bonded groups. What are the implications of the main findings? Monolithic integration enhances structural stability. The absence of an adhesive interface eliminates bonding-related limitations. The design offers a mechanically reliable alternative to conventional bonding. This study evaluated the resistance under load of a novel monolithic prosthetic design integrating functional orthodontic components within a digitally fabricated framework. Sixty-six specimens were allocated into three groups: (1) a Design Group consisting of one-piece 3D-printed customized metal copings with integrated brackets or tubes; (2) a Porcelain Crown Group with conventionally bonded orthodontic attachments; and (3) a Natural Teeth Group with brackets and tubes bonded to extracted human teeth. Each group included premolar (bracket) and molar (tube) subgroups (n = 11). All specimens were subjected to shear loading using a universal testing machine. Higher resistance values were observed in the monolithic group (92.56 ± 63.88 MPa) (p < 0.001); however, these values represent structural resistance rather than shear bond strength. Despite the wide variability, all measured values remained above the clinically accepted threshold. No statistically significant differences were observed between porcelain crowns and natural teeth in premolar or molar subgroups. The findings indicate that eliminating the adhesive interface enhances structural integrity under shear forces. This monolithic orthodontic–prosthetic approach may provide a clinically relevant alternative in cases where conventional bonding is not feasible and supports a fully digital, patient-specific workflow through scanner library integration. [ABSTRACT FROM AUTHOR] |
| Copyright of Materials (1996-1944) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
|
Full text is not displayed to guests.
Login for full access.
|
|
| Abstract: | Highlights: Monolithic bracket–crown design fabricated using 3D printing. Higher resistance under load than conventionally bonded brackets on crowns and teeth. Enables fully digital, patient-specific workflow. The monolithic design minimizes adhesive-related bonding failures. What are the main findings? A total of 66 specimens were equally distributed between molars (tubes) and premolars (brackets) groups. The monolithic Design Group showed markedly higher resistance values (92.56 MPa). The one-piece structure demonstrated higher resistance under load compared with the bonded groups. What are the implications of the main findings? Monolithic integration enhances structural stability. The absence of an adhesive interface eliminates bonding-related limitations. The design offers a mechanically reliable alternative to conventional bonding. This study evaluated the resistance under load of a novel monolithic prosthetic design integrating functional orthodontic components within a digitally fabricated framework. Sixty-six specimens were allocated into three groups: (1) a Design Group consisting of one-piece 3D-printed customized metal copings with integrated brackets or tubes; (2) a Porcelain Crown Group with conventionally bonded orthodontic attachments; and (3) a Natural Teeth Group with brackets and tubes bonded to extracted human teeth. Each group included premolar (bracket) and molar (tube) subgroups (n = 11). All specimens were subjected to shear loading using a universal testing machine. Higher resistance values were observed in the monolithic group (92.56 ± 63.88 MPa) (p < 0.001); however, these values represent structural resistance rather than shear bond strength. Despite the wide variability, all measured values remained above the clinically accepted threshold. No statistically significant differences were observed between porcelain crowns and natural teeth in premolar or molar subgroups. The findings indicate that eliminating the adhesive interface enhances structural integrity under shear forces. This monolithic orthodontic–prosthetic approach may provide a clinically relevant alternative in cases where conventional bonding is not feasible and supports a fully digital, patient-specific workflow through scanner library integration. [ABSTRACT FROM AUTHOR] |
|---|---|
| ISSN: | 19961944 |
| DOI: | 10.3390/ma19081584 |
