The Effect of Ball Attachment Versus Curved Bar Attachment on Stress Distribution in Implant
Retained Mandibular Overdenture (An In Vitro Study)
Haitham A Elsisi1, Tamer O Ibrahim2, Ehab M Abuelroos2, Zeinab N Emam3,
Shereen M El Sayed3, Manar Abu-Nawareg4, Ahmed Z Zidan5, Hoda A
Fansa6, Khaled A ElBanna7 and Ibrahim Mohamed Hamouda8,9*
1Assistant Professor, Removable Prosthodontics Division, Oral and Maxillofacial
Surgery and rehabilitation Department, Faculty of Dental Medicine, Umm Al-Qura
University, Saudi Arabia
2Professor, Removable Prosthodontics Division, Oral and Maxillofacial surgery and
rehabilitation Department, Faculty of Dental Medicine, Umm Al-Qura University, Saudi
Arabia and Department of Prosthodontics, Faculty of Dentistry, Ain Shams University,
Egypt
3Associate Professor, Fixed Prosthodontics division, Oral and Maxillofacial Surgery and
Rehabilitation Department, Faculty of Dental Medicine, Umm Al Qura University, Saudi
Arabia and Professor, Fixed prosthodontics Department, Faculty of Oral and Dental
Medicine, Cairo University, Egypt
4Professor, Restorative Dentistry Department, Faculty of dentistry, King Abdulaziz
University, Saudi Arabia and Biomaterials Department, Faculty of Dentistry, Cairo
University, Egypt
5Assistant professor of Dental Biomaterials Science, Faculty of Dental Medicine, Umm
Al-Qura University Saudi Arabia and Faculty of Dentistry, October University for
Modern Science and Arts (MSA), Egypt
6Associate professor of Oral Biology, Faculty of Dental Medicine, Umm Al-Qura
University, Saudi Arabia and faculty of Dentistry Alexandria University, Egypt
7Assistant professor, Fixed Prosthodontics division, Faculty of Dental Medicine, Umm Al
Qura University, Saudi Arabia
8Professor of Dental Biomaterials, Department of Restoratine Dentistry, Faculty of
Dental Medicine, Umm Al Qura University, Makkah, KSA
9Professor of Dental Biomaterials, Department of Dental Biomaterials, Faculty of
Dental Medicine, Mansoura University, Mansoura, Egypt
*Corresponding Author: Ibrahim Mohamed Hamouda, Professor of Dental
Biomaterials, Department of Restoratine Dentistry, Faculty of Dental Medicine,
Umm Al Qura University, Makkah, KSA and Department of Dental Biomaterials,
Faculty of Dental Medicine, Mansoura University, Mansoura, Egypt.
Received: February 28, 2023; Published: March 15, 2023
Abstract
One model was constructed representing mandibular completely edentulous case. On this model, two implants were placed in
the canine regions. Two identical experimental overdentures were constructed. The first overdenture was fitted to two ball attachments
while the second one was fitted to a curved bar attachment following the arch curvature connecting the two implants. Four
strain gauges were installed, on the labial and distal sides of each implant to record the strain induced by the loads applied. A special
loading device was used to apply standardized static vertical load on lower central incisors and bilaterally on first molars for each
experimental overdenture. It was found that curved bar induce more stresses than ball attachments. It was concluded that Stresses
transmitted to the implants using curved bar were much higher than that transmitted by the use of ball attachments.
Keywords: Ball Attachment; Stress; Implant; Mandibular; Overdenture
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