<Original Article>Dynamic retentive force of a mandibular unilateral removable partial denture framework with a back-action clasp
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概要
- 論文の詳細を見る
Purpose: The purpose of this study was to investigate the dynamic retentive force of a mandibular unilateral distal-extension partial denture framework with a back-action clasp that was designed in a buccally tilted cast on a dental surveyor. The retention mechanism of this framework was analyzed in comparison with other typical unilateral and bilateral frameworks for the mandibular Kennedy class II case. Materials and Methods: Experimental gold alloy frameworks of three designs were repositioned to the master cast, and lifted upward to the vertical direction to the occlusal plane. The load required to dislodge each framework was recorded. The retentive force of each framework was determined by the maximum load in a dislodgment cycle. The bending strength of a plain clasp pattern of the same length as the clasp arm used in each framework was also measured by cantilever beam test. Results: The mean retentive force of the unilateral framework with a back-action clasp of relalively low bending strength was significantly higher (P < 0.01) than that of the unilateral framework with two Akers clasps of relatively high bending strength, and 70 to 80% of the bilateral framework with two Akers clasps on the edentulous side and a double Akers clasp on the contralateral side. The unilateral framework with a back-action clasp showed the greatest early load resistance in the dislodgment cycle among the three designs. Conclusion: The reasonable retention mechanism was demonstrated by the unilateral framework with a back-action clasp.
- 東京医科歯科大学の論文
著者
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WAKABAYASHI Noriyuki
Removable Prosthodontics, Department of Masticatory Function Rehabilitation, Division of Oral Health
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OHYAMA Takashi
Removable Prosthodontics, Department of Masticatory Function Rehabilitation, Division of Oral Health
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Ohyama T
Tokyo Medical And Dental University
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HIDESHIMA Masayuki
Removable Partial Denture Prosthodontics, Department of Masticatory Function Rehabilitation, Divisio
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Park Innim
Removable Prosthodontics, Department of Masticatory Function Rehabilitation, Division of Oral Health
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Eto Miho
Removable Prosthodontics, Department of Masticatory Function Rehabilitation, Division of Oral Health
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Park Innim
Removable Prosthodontics Department Of Masticatory Function Rehabilitation Division Of Oral Health S
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Eto Miho
Removable Prosthodontics Department Of Masticatory Function Rehabilitation Division Of Oral Health S
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Hideshima Masayuki
Removable Partial Denture Prosthodontics Department Of Masticatory Function Rehabilitation Division
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Wakabayashi Noriyuki
Removable Prosthodontics Department Of Masticatory Function Rehabilitation Division Of Oral Health S
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Ohyama Takashi
Removable Prosthodontics Department Of Masticatory Function Rehabilitation Division Of Oral Health S
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Wakabayashi Noriyuki
Removable Partial Prosthodontics Department Of Masticatory Function Rehabilitation Division Of Oral
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Park Innim/eto
Removable Prosthodontics Department Of Masticatory Function Rehabilitation Division Of Oral Health S
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Park Innim
Removable Prosthodontics, Department of Masticatory Function Rehabilitation, Division of Oral Health Sciences, Graduate School, Tokyo Medical and Dental University
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