Reinforcement for Overdentures on Abutment Teeth
Purpose: This study investigated the effect of the position of reinforcement wires, differences in artificial teeth, and framework designs on the breaking strength of overdentures. Methods: The basal surfaces of composite resin teeth and acrylic resin teeth were removed using a carbide bur. A reinfo...
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| Published in | Nihon Hotetsu Shika Gakkai Zasshi Vol. 50; no. 2; pp. 191 - 199 |
|---|---|
| Main Author | |
| Format | Journal Article |
| Language | Japanese |
| Published |
Japan
Japan Prosthodontic Society
01.04.2006
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| Subjects | |
| Online Access | Get full text |
| ISSN | 0389-5386 1883-177X |
| DOI | 10.2186/jjps.50.191 |
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| Abstract | Purpose: This study investigated the effect of the position of reinforcement wires, differences in artificial teeth, and framework designs on the breaking strength of overdentures. Methods: The basal surfaces of composite resin teeth and acrylic resin teeth were removed using a carbide bur. A reinforcement wire or a wrought palatal bar was embedded near the occlusal surface or basal surface. Four types of framework structures were designed: conventional skeleton (skeleton), housing with skeleton (housing), housing plus short metal backing (metal backing), and housing plus long metal backing (double structure). After the wires, bars, and frameworks were sand-blasted with 50μm Al203 powder, they were primed with a metal primer and embedded in a heat-polymerized denture base resin. The breaking strengths (N) and maximum stiffness (N/mm) of two-week aged (37deg;C) specimens were measured using a bending test (n=8). All data obtained at a crosshead speed of 2.0mm/min were analyzed by ANOVA/Tukey's test (α=0.01). Results: There were no statistical differences between the two kinds of artificial teeth (p>0.01). The wrought palatal bar had significantly higher strength than the reinforcement wire (p<0.01). Greater strengths were found for specimens with frameworks than those without frameworks (p<0.01). The breaking strength of the wrought palatal bar embedded near the occlusal surface was higher than that on the basal surface (p>0.01). The breaking strength and maximum stiffness of the double structure framework were significantly greater (p<0.01) than those of the conventional frameworks. Conclusion: The breaking strengths of overdentures were influenced by the size and position of the reinforcement wires. Double structure frameworks are recommended for overdentures to promote a longterm prognosis without denture breakage. |
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| AbstractList | This study investigated the effect of the position of reinforcement wires, differences in artificial teeth, and framework designs on the breaking strength of overdentures.
The basal surfaces of composite resin teeth and acrylic resin teeth were removed using a carbide bur. A reinforcement wire or a wrought palatal bar was embedded near the occlusal surface or basal surface. Four types of framework structures were designed : conventional skeleton (skeleton), housing with skeleton (housing), housing plus short metal backing (metal backing), and housing plus long metal backing (double structure). After the wires, bars, and frameworks were sand-blasted with 50 microm Al(2)O(3) powder, they were primed with a metal primer and embedded in a heat-polymerized denture base resin. The breaking strengths (N) and maximum stiffness (N/mm) of two-week aged (37 degrees C) specimens were measured using a bending test (n=8). All data obtained at a crosshead speed of 2.0 mm/min were analyzed by ANOVA/Tukey's test (alpha=0.01).
There were no statistical differences between the two kinds of artificial teeth (p>0.01). The wrought palatal bar had significantly higher strength than the reinforcement wire (p<0.01). Greater strengths were found for specimens with frameworks than those without frameworks (p<0.01). The breaking strength of the wrought palatal bar embedded near the occlusal surface was higher than that on the basal surface (p>0.01). The breaking strength and maximum stiffness of the double structure framework were significantly greater (p<0.01) than those of the conventional frameworks.
The breaking strengths of overdentures were influenced by the size and position of the reinforcement wires. Double structure frameworks are recommended for overdentures to promote a long-term prognosis without denture breakage. Purpose: This study investigated the effect of the position of reinforcement wires, differences in artificial teeth, and framework designs on the breaking strength of overdentures. Methods: The basal surfaces of composite resin teeth and acrylic resin teeth were removed using a carbide bur. A reinforcement wire or a wrought palatal bar was embedded near the occlusal surface or basal surface. Four types of framework structures were designed: conventional skeleton (skeleton), housing with skeleton (housing), housing plus short metal backing (metal backing), and housing plus long metal backing (double structure). After the wires, bars, and frameworks were sand-blasted with 50μm Al203 powder, they were primed with a metal primer and embedded in a heat-polymerized denture base resin. The breaking strengths (N) and maximum stiffness (N/mm) of two-week aged (37deg;C) specimens were measured using a bending test (n=8). All data obtained at a crosshead speed of 2.0mm/min were analyzed by ANOVA/Tukey's test (α=0.01). Results: There were no statistical differences between the two kinds of artificial teeth (p>0.01). The wrought palatal bar had significantly higher strength than the reinforcement wire (p<0.01). Greater strengths were found for specimens with frameworks than those without frameworks (p<0.01). The breaking strength of the wrought palatal bar embedded near the occlusal surface was higher than that on the basal surface (p>0.01). The breaking strength and maximum stiffness of the double structure framework were significantly greater (p<0.01) than those of the conventional frameworks. Conclusion: The breaking strengths of overdentures were influenced by the size and position of the reinforcement wires. Double structure frameworks are recommended for overdentures to promote a longterm prognosis without denture breakage. This study investigated the effect of the position of reinforcement wires, differences in artificial teeth, and framework designs on the breaking strength of overdentures.PURPOSEThis study investigated the effect of the position of reinforcement wires, differences in artificial teeth, and framework designs on the breaking strength of overdentures.The basal surfaces of composite resin teeth and acrylic resin teeth were removed using a carbide bur. A reinforcement wire or a wrought palatal bar was embedded near the occlusal surface or basal surface. Four types of framework structures were designed : conventional skeleton (skeleton), housing with skeleton (housing), housing plus short metal backing (metal backing), and housing plus long metal backing (double structure). After the wires, bars, and frameworks were sand-blasted with 50 microm Al(2)O(3) powder, they were primed with a metal primer and embedded in a heat-polymerized denture base resin. The breaking strengths (N) and maximum stiffness (N/mm) of two-week aged (37 degrees C) specimens were measured using a bending test (n=8). All data obtained at a crosshead speed of 2.0 mm/min were analyzed by ANOVA/Tukey's test (alpha=0.01).METHODSThe basal surfaces of composite resin teeth and acrylic resin teeth were removed using a carbide bur. A reinforcement wire or a wrought palatal bar was embedded near the occlusal surface or basal surface. Four types of framework structures were designed : conventional skeleton (skeleton), housing with skeleton (housing), housing plus short metal backing (metal backing), and housing plus long metal backing (double structure). After the wires, bars, and frameworks were sand-blasted with 50 microm Al(2)O(3) powder, they were primed with a metal primer and embedded in a heat-polymerized denture base resin. The breaking strengths (N) and maximum stiffness (N/mm) of two-week aged (37 degrees C) specimens were measured using a bending test (n=8). All data obtained at a crosshead speed of 2.0 mm/min were analyzed by ANOVA/Tukey's test (alpha=0.01).There were no statistical differences between the two kinds of artificial teeth (p>0.01). The wrought palatal bar had significantly higher strength than the reinforcement wire (p<0.01). Greater strengths were found for specimens with frameworks than those without frameworks (p<0.01). The breaking strength of the wrought palatal bar embedded near the occlusal surface was higher than that on the basal surface (p>0.01). The breaking strength and maximum stiffness of the double structure framework were significantly greater (p<0.01) than those of the conventional frameworks.RESULTSThere were no statistical differences between the two kinds of artificial teeth (p>0.01). The wrought palatal bar had significantly higher strength than the reinforcement wire (p<0.01). Greater strengths were found for specimens with frameworks than those without frameworks (p<0.01). The breaking strength of the wrought palatal bar embedded near the occlusal surface was higher than that on the basal surface (p>0.01). The breaking strength and maximum stiffness of the double structure framework were significantly greater (p<0.01) than those of the conventional frameworks.The breaking strengths of overdentures were influenced by the size and position of the reinforcement wires. Double structure frameworks are recommended for overdentures to promote a long-term prognosis without denture breakage.CONCLUSIONThe breaking strengths of overdentures were influenced by the size and position of the reinforcement wires. Double structure frameworks are recommended for overdentures to promote a long-term prognosis without denture breakage. |
| Author | Osada, Tomoko |
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| References | 1) Brewer AA. Removable partial overdentures. In Brewer AA, Morrow RM, editors, Overdentures 169-174, St. Louis: The C. V. Mosby, 1980. 25) 尾花甚一監修. すれ違い咬合の補綴37-48, 東京: 医歯薬出版, 1994 11) 河野修己, 斉藤俊文, 内藤昭ほか. レジン床の補強に関する研究たわみおよび破折強さ. 歯学50: 167-176, 1971. 6) 前田芳信. 臨床に生かすオーバーデンチャーインプラント・天然歯支台のすべて60-81, 東京: クインテッセンス出版, 2003 7) Brewer AA, Morrow RM. Overdenture problems. In Brewer AA, Morrow RM, editors, Overdentures 341-347, St Louis: The C. V. Mosby, 1980. 19) 鈴木恭典. 義歯構造が負担圧配分に及ぼす影響に関する実験的研究. 補綴誌36: 1072-1086, 1992. 16) Jumber JF, Jumber MJ, Anderson FH. An atlas of overdentures and attachments 123-132, Chicago Quintessence, 1981. 13) 岡田政俊, 前田芳信野首孝祠ほか. 加熱重合型接着性レジンに関する研究レジン床義歯におけるコバルトクロム線の補強効果について. 補綴誌29: 78-84, 1985 14) 宮本雅司. 金属板によるはりつけ補強法に関する研究第1報3点曲げ試験. 補綴誌30: 882-888, 1986. 15) Ozgul K, Tulin N, Arzu T et al. The effect of length and concentration of glass fibers on the mechanical properties of an injection- and a compression-molded denture base polymer. J Prosthet Dent 90: 385-393, 2003. 20) 大久保力廣, 鈴木恭典, 中山昇ほか. 義歯構造の相違が疲労強度に及ぼす影響. 補綴誌37: 420-430, 1993. 22) 栗原大介. 金属構造義歯の曲げ強度特性に関する実験的研究. 鶴見歯学20: 163-179, 1994. 9) Rantanen AV. The talon cusp. Oral Surg 32: 398-399, 1971. 4) 真鍋顕. オーバーデンチャーをめぐる諸問題解決されたもの, 解決途上のもの. 補綴誌48: 372-383, 2004. 12) 木村福二. 金属線によるレジン床の補強に関する基礎的研究九州歯会誌34: 665-677, 1981. 23) 上田芳男, 濱崎真一, 川畑直嗣ほか. オーバーデンチャーの支台歯の負担性に対するコーピングの形態の影響補綴誌31: 971-979, 1987. 8) Ettinger RL, Jakobsen J. Denture treatment needs of an overdenture population. Int J Prosthodont 10: 355-365, 1997. 24) 高橋宏美, 小森山学, 平沢忠. 硬質レジン歯の構造と接着に関する研究補綴誌41: 814-821, 1997 2) 長岡英一. オーバーデンチャー1-34, 京都: 永末書店, 1984. 5) Ohkubo C, Kurihara D, Sato J et al. Breaking strengths of metal framework structures for implant-stabilized overdentures. Prothodont Res Pract 2: 27-34, 2003. 3) 長澤亨, 岡根秀明. オーバーデンチャー5-10, 東京: 口腔保健協会, 1997 21) 大久保力廣, 中山昇, 鈴木恭典ほか. 構造設計と歯台装置の相違が義歯の破折強度に及ぼす影響. 補綴誌38: 897-907, 1994. 18) 大久保力廣, 鈴木恭典, 栗原大介ほか. 義歯構造の相違がねじり強度に及ぼす影響. 補綴誌36: 443-449, 1992 10) 阿部實. 義歯の破損の原因とその対応について. デンタルアスペクト3: 13-21, 1989. 17) 大久保力廣. 義歯の構造設計に関する実験的研究. 補綴誌33: 1273-1287, 1989. |
| References_xml | – reference: 18) 大久保力廣, 鈴木恭典, 栗原大介ほか. 義歯構造の相違がねじり強度に及ぼす影響. 補綴誌36: 443-449, 1992 – reference: 19) 鈴木恭典. 義歯構造が負担圧配分に及ぼす影響に関する実験的研究. 補綴誌36: 1072-1086, 1992. – reference: 16) Jumber JF, Jumber MJ, Anderson FH. An atlas of overdentures and attachments 123-132, Chicago Quintessence, 1981. – reference: 20) 大久保力廣, 鈴木恭典, 中山昇ほか. 義歯構造の相違が疲労強度に及ぼす影響. 補綴誌37: 420-430, 1993. – reference: 14) 宮本雅司. 金属板によるはりつけ補強法に関する研究第1報3点曲げ試験. 補綴誌30: 882-888, 1986. – reference: 12) 木村福二. 金属線によるレジン床の補強に関する基礎的研究九州歯会誌34: 665-677, 1981. – reference: 3) 長澤亨, 岡根秀明. オーバーデンチャー5-10, 東京: 口腔保健協会, 1997 – reference: 25) 尾花甚一監修. すれ違い咬合の補綴37-48, 東京: 医歯薬出版, 1994 – reference: 6) 前田芳信. 臨床に生かすオーバーデンチャーインプラント・天然歯支台のすべて60-81, 東京: クインテッセンス出版, 2003 – reference: 13) 岡田政俊, 前田芳信野首孝祠ほか. 加熱重合型接着性レジンに関する研究レジン床義歯におけるコバルトクロム線の補強効果について. 補綴誌29: 78-84, 1985 – reference: 8) Ettinger RL, Jakobsen J. Denture treatment needs of an overdenture population. Int J Prosthodont 10: 355-365, 1997. – reference: 9) Rantanen AV. The talon cusp. Oral Surg 32: 398-399, 1971. – reference: 11) 河野修己, 斉藤俊文, 内藤昭ほか. レジン床の補強に関する研究たわみおよび破折強さ. 歯学50: 167-176, 1971. – reference: 15) Ozgul K, Tulin N, Arzu T et al. The effect of length and concentration of glass fibers on the mechanical properties of an injection- and a compression-molded denture base polymer. J Prosthet Dent 90: 385-393, 2003. – reference: 21) 大久保力廣, 中山昇, 鈴木恭典ほか. 構造設計と歯台装置の相違が義歯の破折強度に及ぼす影響. 補綴誌38: 897-907, 1994. – reference: 24) 高橋宏美, 小森山学, 平沢忠. 硬質レジン歯の構造と接着に関する研究補綴誌41: 814-821, 1997 – reference: 17) 大久保力廣. 義歯の構造設計に関する実験的研究. 補綴誌33: 1273-1287, 1989. – reference: 4) 真鍋顕. オーバーデンチャーをめぐる諸問題解決されたもの, 解決途上のもの. 補綴誌48: 372-383, 2004. – reference: 22) 栗原大介. 金属構造義歯の曲げ強度特性に関する実験的研究. 鶴見歯学20: 163-179, 1994. – reference: 23) 上田芳男, 濱崎真一, 川畑直嗣ほか. オーバーデンチャーの支台歯の負担性に対するコーピングの形態の影響補綴誌31: 971-979, 1987. – reference: 10) 阿部實. 義歯の破損の原因とその対応について. デンタルアスペクト3: 13-21, 1989. – reference: 2) 長岡英一. オーバーデンチャー1-34, 京都: 永末書店, 1984. – reference: 1) Brewer AA. Removable partial overdentures. In Brewer AA, Morrow RM, editors, Overdentures 169-174, St. Louis: The C. V. Mosby, 1980. – reference: 5) Ohkubo C, Kurihara D, Sato J et al. Breaking strengths of metal framework structures for implant-stabilized overdentures. Prothodont Res Pract 2: 27-34, 2003. – reference: 7) Brewer AA, Morrow RM. Overdenture problems. In Brewer AA, Morrow RM, editors, Overdentures 341-347, St Louis: The C. V. Mosby, 1980. |
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| SubjectTerms | Acrylic Resins breaking strength Composite Resins coping Dental Abutments Denture, Overlay framework design Orthodontic Wires overdenture Prosthesis Design reinforcement Stress, Mechanical |
| Title | Reinforcement for Overdentures on Abutment Teeth |
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