THE EFFECT OF HYDROGEN-ION CONCENTRATION ON THE FORCE-DEGRADATION RATE OF ORTHODONTIC POLYURETHANE CHAIN ELASTICS

被引:40
作者
FERRITER, JP
MEYERS, CE
LORTON, L
机构
[1] USA,ORTHODONT RESIDENCY PROGRAM,FT HEAPE,MD 20755
[2] USA,INST DENT RES,BIOENGN BRANCH,FT GEORGE G MEADE,MD 20755
关键词
D O I
10.1016/S0889-5406(05)81648-8
中图分类号
R78 [口腔科学];
学科分类号
1003 ;
摘要
The effect of pH on the force-degradation rates of seven commercial orthodontic polyurethane chain elastics was evaluated in an in vitro study. The pH values of 4.95 and 7.26 were selected for testing because they represent values close to the reported extremes of plaque and saliva pH. Seven test elastic products were extended to (1) equal distances and (2) equal initial force levels, and the force-degradation rates were recorded over 4 weeks. All the test products yielded a significantly greater force-decay rate in the basic (pH 7.26) solution than in the acidic (pH 4.95) solution over 4 weeks. A hypothesis is presented that the decay rate of orthodontic polyurethane chain elastics is inversely proportional to the oral pH, with a corollary that basic pH levels are most hostile to polyurethane chain elastics. © 1990 Mosby-Year Book, Inc.
引用
收藏
页码:404 / 410
页数:7
相关论文
共 23 条
[1]  
ANDREASE.GF, 1970, ANGLE ORTHOD, V40, P151
[2]   RELAXATION OF ORTHODONTIC ELASTOMERIC CHAINS AND MODULES INVITRO AND INVIVO [J].
ASH, JL ;
NIKOLAI, RJ .
JOURNAL OF DENTAL RESEARCH, 1978, 57 (5-6) :685-690
[3]   ORAL FOOD CLEARANCE AND THE PH OF PLAQUE AND SALIVA [J].
BIBBY, BG ;
MUNDORFF, SA ;
ZERO, DT ;
ALMEKINDER, KJ .
JOURNAL OF THE AMERICAN DENTAL ASSOCIATION, 1986, 112 (03) :333-337
[4]  
BISHARA SE, 1970, ANGLE ORTHOD, V67, P554
[5]  
BRANTLEY WA, 1979, ANGLE ORTHOD, V49, P37
[6]  
BRAWLEY R. E., 1935, Journal of Dental Research, V15, P55, DOI 10.1177/00220345350150010701
[7]  
BROBECK JR, 1973, BEST TAYLORS PHYSL B, P2
[8]  
BROOKS DG, 1976, J DENT RES B, V55, P385
[9]  
Chang H F, 1987, Proc Natl Sci Counc Repub China B, V11, P45
[10]   FORCE DEGRADATION OF ORTHODONTIC ELASTOMERIC CHAINS - A PRODUCT COMPARISON STUDY [J].
DEGENOVA, DC ;
MCINNESLEDOUX, P ;
WEINBERG, R ;
SHAYE, R .
AMERICAN JOURNAL OF ORTHODONTICS AND DENTOFACIAL ORTHOPEDICS, 1985, 87 (05) :377-384