Effect of two different Overdenture attachments on the biting force and occlusal force distribution

Helmy, Mai Adel; Kothayer, Marwa

doi:10.21608/edj.2019.72927

Cited by 2 publications

(1 citation statement)

References 23 publications

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“…The average of the masticatory forces in removable denture wearers are in the range of 100 N and 140 N [49,75] in the literature. Sharma, et al, and Helmy and Kothayer, stated that the maximum masticatory bite force for complete denture wearers is 60-80 N. These values increase to 150-170 N for patients with implant-supported overdenture [76,77]. In a study by Hu, et al, the moderate level of average masticatory occlusal force for the implant overdentures was stated to be 100 N [78].…”

Section: Discussionmentioning

confidence: 99%

Stress Distribution on Various Implant-Retained Bar Overdentures

et al. 2022

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The purpose of this study was to evaluate the effects of various fabrication techniques and materials used in implant-supported mandibular overdentures with a Hader bar attachment over added stress distribution. Three-dimensional geometric solid models, consisting of two implants (3.3 mm × 12 mm) placed at the bone level on both mandibular canine regions and a Hader bar structure, were prepared. Model 1 simulated a bar retentive system made from Titanium Grade 5 material by Computer Numerical Control (CNC) milling technique without using any converting adapter/multi-unit element on the implants, while Model 2 simulated the same configuration, but with converting adapters on the implants. Model 3 simulated a bar retentive system made from Cobalt-Chromium material, made by using conventional casting technique with converting adapters on the implants. Static loads of 100 Newton were applied on test models from horizontal, vertical and oblique directions. ANSYS R15.0 Workbench Software was used to compare Von Mises stress distribution and minimum/maximum principal stress values, and the results were evaluated by using Finite Element Analysis method. As a result, the highest stress distribution values under static loading in three different directions were obtained in Model 1. Stress was observed intensely around the necks of the implants and the surrounding cortical bone areas in all models. In scope of the results obtained, using converting adapters on implants has been considered to decrease transmission of forces onto implants and surrounding bone structures, thus providing a better stress distribution. It has also been observed that the type of material used for bar fabrication has no significant influence on stress values in those models where converting adapters were used.

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Section: Discussionmentioning

confidence: 99%

Stress Distribution on Various Implant-Retained Bar Overdentures

et al. 2022

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Digital Occlusion's Role in Implant Rehabilitation

Lerner

2024

Advances in Medical Technologies and Clinical Practice

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Contemporary implant rehabilitations are aesthetically driven. Consequently, digital planning and guided surgery deliver higher predictability and precision, than do analog procedures. The aim of this chapter is to show the integration of digital occlusion in the different phases of full arch implant rehabilitation with immediate implant placement and immediate loading procedures. Digital occlusal analysis raises the precision of functional occlusal adjustments, while improving the long-term predictability and stability of both case function and aesthetics. This chapter will present a systematic digital workflow detailing every stage of full arch rehabilitation treatment while showcasing digital occlusal diagnosis with the T-Scan system, to install a precise implant prosthesis occlusal scheme. A full arch rehabilitation case involving immediate implant placement and immediate implant loading will be presented that was occlusally finished with the T-Scan. And, important new mechanical implant complications research that tested T-Scan measured digital occlusion case insertions against articulating paper only case insertions, is also detailed. The authors found that a measured approach with T-Scan to guide the adjusted occlusal contacts statistically lessened common mechanical complications that continue to plague the implant Digital Workflow. The chapter concludes with a detailed pictorial explanation of how to clinically perform the T-Scan + Articulating Paper method that was used in the mechanical complications research study to select the correct articulating paper marks where implant occlusal contacts are force overloaded.

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Effect of two different Overdenture attachments on the biting force and occlusal force distribution

Cited by 2 publications

References 23 publications

Stress Distribution on Various Implant-Retained Bar Overdentures

Stress Distribution on Various Implant-Retained Bar Overdentures

Digital Occlusion's Role in Implant Rehabilitation

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