<Original Article>Dynamic retentive force of a mandibular unilateral removable partial denture framework with a back-action clasp
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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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- Eto Miho
- Removable Prosthodontics, Department of Masticatory Function Rehabilitation, Division of Oral Health Sciences, Graduate School, Tokyo Medical and Dental University
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- Wakabayashi Noriyuki
- Removable Prosthodontics, Department of Masticatory Function Rehabilitation, Division of Oral Health Sciences, Graduate School, Tokyo Medical and Dental University
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- Hideshima Masayuki
- Removable Prosthodontics, Department of Masticatory Function Rehabilitation, Division of Oral Health Sciences, Graduate School, Tokyo Medical and Dental University
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- Ohyama Takashi
- Removable Prosthodontics, Department of Masticatory Function Rehabilitation, Division of Oral Health Sciences, Graduate School, Tokyo Medical and Dental University
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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.
収録刊行物
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- Journal of Medical and Dental Sciences
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Journal of Medical and Dental Sciences 48 (4), 105-111, 2001
国立大学法人 東京医科歯科大学
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詳細情報 詳細情報について
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- CRID
- 1390282680495615360
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- NII論文ID
- 120006410141
- 110000032761
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- ISSN
- 21859132
- 13428810
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- IRDB
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可