A comprehensive study on the mechanical effects of implant-supported prostheses under multi-directional loading and different occlusal contact points

To evaluate screw loosening and fracture load and angular deviation of a single implant-supported prosthesis under multi-directional loading condition at three different occlusal contact points. A total of 40 metal crowns were cemented to external connection implants and were embedded vertically and...

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Bibliographic Details
Published in:BMC oral health 2023-05, Vol.23 (1), p.338-338, Article 338
Main Authors: Tak, Sangmyeong, Jeong, Yuwon, Kim, Jong-Eun, Kim, Jee-Hwan, Lee, Hyeonjong
Format: Article
Language:English
Subjects:
Care and treatment
Crowns
Dental implant
Dental Implants
Dental Prosthesis, Implant-Supported
Dental prosthetics
Dental Restoration Failure
Dental Stress Analysis - methods
Diagnosis
Fractures
Health aspects
Humans
Implant dentures
Implant-supported prosthesis
Internal fixation in fractures
Malocclusion
Occlusion
Patient outcomes
Prostheses
Statistics
Stress
Stress concentration
Success
Vector analysis
Wire
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Summary:To evaluate screw loosening and fracture load and angular deviation of a single implant-supported prosthesis under multi-directional loading condition at three different occlusal contact points. A total of 40 metal crowns were cemented to external connection implants and were embedded vertically and obliquely. The occlusal surface of the crown was designed with three flat surfaces, contact a, b, and c, representing outer and inner 20-degree inclination for buccal and lingual cusps. The angular deviations of implant crown under static 50N of loading were measured. And screw removal torque was evaluated before and after 57,600 load cycles. Then, fracture load was measured for each specimen. Data analysis was performed using one-way analysis of variance test of significance followed by Tukey honest significant difference (HSD) test(p 
ISSN:1472-6831
1472-6831
DOI:10.1186/s12903-023-03016-9