Abstract
BackgroundImplant-supported removable partial dentures (ISRPD) are supported at the free-end region with implant retainers. As implant retainers prevent denture settlement and facilitate denture retention, this is intended to improve masticatory performance in comparison with that of conventional removable dentures. In the present study, we evaluated the effect of implant retainers at the free-end region of removable dentures on occlusal force and masticatory efficiency using a pressure-sensitive sheet, and measured glucose concentration in saliva after mastication with gummy candy.MethodsIn the present study, the occlusal force and masticatory efficiency of 13 subjects were measured in the following three conditions: without dentures (Condition 1), wearing dentures but not supported by implants (Condition 2), and wearing dentures supported by implants (ISRPD) (Condition 3). All data were statistically compared.ResultsRegarding the occlusal force, Condition 3 showed significantly higher scores than the other conditions; however, there were no significant differences between Conditions 1 and 2. Regarding the masticatory efficiency, Condition 3 showed significantly higher scores than Condition 2.ConclusionsWith ISRPD, the occlusal force and masticatory efficiency were increased in comparison with those with conventional removable dentures.
Highlights
Implant-supported removable partial dentures (ISRPD) are supported at the free-end region with implant retainers
Patients with distal-extension removable partial dentures sometimes complain of discomfort, weak occlusal force, or poor masticatory efficiency [1,2,3]
Patients with fixed implant prostheses were reported to be more satisfied with their comfort, occlusal force, and masticatory efficiency [4, 7, 8]
Summary
Implant-supported removable partial dentures (ISRPD) are supported at the free-end region with implant retainers. Patients with distal-extension removable partial dentures sometimes complain of discomfort, weak occlusal force, or poor masticatory efficiency [1,2,3]. When wearing a distal-extension removable denture, abutment teeth are subject to damage accompanied by periodontal bone resorption [4, 5]. This can lead to the loss of a vertical. Patients with fixed implant prostheses were reported to be more satisfied with their comfort, occlusal force, and masticatory efficiency [4, 7, 8]. In comparison with conventional removable dentures, a case report indicated that ISRPD has the advantages of increased retention, stability, and patient satisfaction [12]. In comparison with fixed prostheses, ISRPD can reduce the number of used implants and a superstructure can be fabricated; they can reduce costs
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