Joint Strengths of Metal Framework Structures for Removable Partial Dentures

Ohkubo, Chikahiro; Kurtz, Kenneth S.; Hosoi, Toshio

doi:10.2186/prp.1.50

Cited by 6 publications

(2 citation statements)

References 22 publications

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“…In these cases, implant‐stabilized removable partial dentures (RPD) should be considered (4, 5). On the other hand, clinical observation seems to indicate that the extrusion of teeth and ridge resorption can occur after long‐term use of distal extension RPDs, particularly, Eichner Classfication C1 (6–9). These are cases in which maxillary and mandibular teeth remain across from each other, and there is no vertical occlusal stop preventing contact of the upper and lower teeth.…”

Section: Introductionmentioning

confidence: 99%

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Effect of implant support on distal extension removable partial dentures: in vitro assessment

Ohkubo¹,

Kurihara²,

Shimpo³

et al. 2006

J of Oral Rehabilitation

110

161

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The implants in implant-supported removable partial dentures (RPDs) are placed in the edentulous ridge to stabilize the RPD and minimize the resultant rotational movement. This study investigated the effect of implant placement on RPD stability. A model simulating a mandibular bilateral distal extension missing was fabricated using epoxy resin and silicone impression material as thin (1 mm) and thick (2 mm) soft tissues. Five pressure sensors (PS-10K, Kyowa, Tokyo, Japan) were attached near the left and right first molars (#36 and #46), first premolars (#34 and #44) and medio-lingual alveolar crest. Five bilateral distal extension RPDs with Co-Cr frameworks were conventionally fabricated. After the implants were placed at the bilateral second molar areas, healing caps (4.5 mm high) were connected to the denture base with autopolymerized resin to support the RPD. As in a conventional RPD, sealing screws were placed without connecting them. Loads up to 5 kg were applied, and the pressure and displacement of the RPDs (n = 5) were simultaneously measured and analysed using the Wilcoxen test (alpha = 0.05). There was less pressure on both thin and thick soft tissues, the #36, #46 and the medio-lingual alveolar crest from the implant-supported RPD than from the conventional RPD (P < 0.05). There were no significant differences in pressure on #34 and #44 between the two RPDs (P > 0.05). There was significantly less denture displacement of the implant-supported RPD than of the conventional denture (P < 0.05). Implant support helped prevent the displacement of distal extension RPDs and decreased the pressure on soft tissues.

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Section: Introductionmentioning

confidence: 99%

“…In addition, the continual resorption of the alveolar ridge under the denture base of the RPD causes changes in the occlusal plane. The dentist cannot easily readjust the denture components, such as the retainers and/or connectors, after denture deviation because the components are securely attached in the metal‐base dentures (6).…”

Section: Introductionmentioning

confidence: 99%