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char = f;code = 102
char = f;code = 102
char = e;code = 101
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char = b;code = 98
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char = m;code = 109
char = e;code = 101
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char = e;code = 101
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char = o;code = 111
char = x;code = 120
char = i;code = 105
char = d;code = 100
char = e;code = 101
char = .;code = 46
result sql = Effects of phosphoric acid on bovine enamel bleached with carbamide peroxide.
Effects of phosphoric acid on bovine enamel bleached with carbamide peroxide.
char = T;code = 84
char = h;code = 104
char = e;code = 101
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char = h;code = 104
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char = ;code = 32
char = s;code = 115
char = t;code = 116
char = u;code = 117
char = d;code = 100
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char = a;code = 97
char = s;code = 115
char = ;code = 32
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char = ;code = 32
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char = e;code = 101
char = a;code = 97
char = s;code = 115
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char = r;code = 114
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char = e;code = 101
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char = d;code = 100
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char = r;code = 114
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char = l;code = 108
char = i;code = 105
char = z;code = 122
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char = t;code = 116
char = i;code = 105
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char = n;code = 110
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char = a;code = 97
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char = a;code = 97
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char = i;code = 105
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char = ;code = 32
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char = %;code = 37
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char = e;code = 101
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char = e;code = 101
char = l;code = 108
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char = d;code = 100
char = i;code = 105
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char = f;code = 102
char = e;code = 101
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char = n;code = 110
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char = t;code = 116
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char = m;code = 109
char = e;code = 101
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char = s;code = 115
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char = a;code = 97
char = f;code = 102
char = t;code = 116
char = e;code = 101
char = r;code = 114
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char = b;code = 98
char = l;code = 108
char = e;code = 101
char = a;code = 97
char = c;code = 99
char = h;code = 104
char = i;code = 105
char = n;code = 110
char = g;code = 103
char = ;code = 32
char = w;code = 119
char = i;code = 105
char = t;code = 116
char = h;code = 104
char = ;code = 32
char = 3;code = 51
char = 0;code = 48
char = %;code = 37
char = ;code = 32
char = c;code = 99
char = a;code = 97
char = r;code = 114
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char = a;code = 97
char = m;code = 109
char = i;code = 105
char = d;code = 100
char = e;code = 101
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char = p;code = 112
char = e;code = 101
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char = o;code = 111
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char = e;code = 101
char = .;code = 46
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char = F;code = 70
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char = 4;code = 52
char = ;code = 32
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char = 4;code = 52
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char = m;code = 109
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char = e;code = 101
char = c;code = 99
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char = i;code = 105
char = o;code = 111
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char = s;code = 115
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char = w;code = 119
char = e;code = 101
char = r;code = 114
char = e;code = 101
char = ;code = 32
char = o;code = 111
char = b;code = 98
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char = a;code = 97
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char = e;code = 101
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char = f;code = 102
char = r;code = 114
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char = m;code = 109
char = ;code = 32
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char = h;code = 104
char = e;code = 101
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char = e;code = 101
char = n;code = 110
char = a;code = 97
char = m;code = 109
char = e;code = 101
char = l;code = 108
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char = o;code = 111
char = f;code = 102
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char = 1;code = 49
char = 0;code = 48
char = ;code = 32
char = b;code = 98
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char = i;code = 105
char = n;code = 110
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char = i;code = 105
char = s;code = 115
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char = s;code = 115
char = .;code = 46
char = ;code = 32
char = A;code = 65
char = f;code = 102
char = t;code = 116
char = e;code = 101
char = r;code = 114
char = ;code = 32
char = a;code = 97
char = p;code = 112
char = p;code = 112
char = l;code = 108
char = y;code = 121
char = i;code = 105
char = n;code = 110
char = g;code = 103
char = ;code = 32
char = 3;code = 51
char = 0;code = 48
char = %;code = 37
char = ;code = 32
char = c;code = 99
char = a;code = 97
char = r;code = 114
char = b;code = 98
char = a;code = 97
char = m;code = 109
char = i;code = 105
char = d;code = 100
char = e;code = 101
char = ;code = 32
char = p;code = 112
char = e;code = 101
char = r;code = 114
char = o;code = 111
char = x;code = 120
char = i;code = 105
char = d;code = 100
char = e;code = 101
char = ;code = 32
char = (;code = 40
char = V;code = 86
char = i;code = 105
char = v;code = 118
char = a;code = 97
char = s;code = 115
char = t;code = 116
char = y;code = 121
char = l;code = 108
char = e;code = 101
char = );code = 41
char = ;code = 32
char = f;code = 102
char = o;code = 111
char = r;code = 114
char = ;code = 32
char = 9;code = 57
char = 0;code = 48
char = ;code = 32
char = m;code = 109
char = i;code = 105
char = n;code = 110
char = ,;code = 44
char = ;code = 32
char = s;code = 115
char = p;code = 112
char = e;code = 101
char = c;code = 99
char = i;code = 105
char = m;code = 109
char = e;code = 101
char = n;code = 110
char = s;code = 115
char = ;code = 32
char = w;code = 119
char = e;code = 101
char = r;code = 114
char = e;code = 101
char = ;code = 32
char = s;code = 115
char = t;code = 116
char = o;code = 111
char = r;code = 114
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = a;code = 97
char = r;code = 114
char = t;code = 116
char = i;code = 105
char = f;code = 102
char = i;code = 105
char = c;code = 99
char = i;code = 105
char = a;code = 97
char = l;code = 108
char = ;code = 32
char = s;code = 115
char = a;code = 97
char = l;code = 108
char = i;code = 105
char = v;code = 118
char = a;code = 97
char = ;code = 32
char = f;code = 102
char = o;code = 111
char = r;code = 114
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char = 0;code = 48
char = ,;code = 44
char = ;code = 32
char = 2;code = 50
char = 4;code = 52
char = ,;code = 44
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char = 7;code = 55
char = 2;code = 50
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char = h;code = 104
char = ,;code = 44
char = ;code = 32
char = o;code = 111
char = r;code = 114
char = ;code = 32
char = 7;code = 55
char = ;code = 32
char = d;code = 100
char = ;code = 32
char = a;code = 97
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char = d;code = 100
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = n;code = 110
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char = i;code = 105
char = m;code = 109
char = m;code = 109
char = e;code = 101
char = r;code = 114
char = s;code = 115
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = 3;code = 51
char = 7;code = 55
char = %;code = 37
char = ;code = 32
char = p;code = 112
char = h;code = 104
char = o;code = 111
char = s;code = 115
char = p;code = 112
char = h;code = 104
char = o;code = 111
char = r;code = 114
char = i;code = 105
char = c;code = 99
char = ;code = 32
char = s;code = 115
char = o;code = 111
char = l;code = 108
char = u;code = 117
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = .;code = 46
char = ;code = 32
char = A;code = 65
char = t;code = 116
char = ;code = 32
char = 1;code = 49
char = 5;code = 53
char = ,;code = 44
char = ;code = 32
char = 3;code = 51
char = 0;code = 48
char = ,;code = 44
char = ;code = 32
char = 6;code = 54
char = 0;code = 48
char = ,;code = 44
char = ;code = 32
char = 9;code = 57
char = 0;code = 48
char = ,;code = 44
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = 1;code = 49
char = 2;code = 50
char = 0;code = 48
char = ;code = 32
char = s;code = 115
char = ,;code = 44
char = ;code = 32
char = 5;code = 53
char = -;code = 45
char = m;code = 109
char = l;code = 108
char = ;code = 32
char = a;code = 97
char = l;code = 108
char = i;code = 105
char = q;code = 113
char = u;code = 117
char = o;code = 111
char = t;code = 116
char = s;code = 115
char = ;code = 32
char = w;code = 119
char = e;code = 101
char = r;code = 114
char = e;code = 101
char = ;code = 32
char = e;code = 101
char = x;code = 120
char = t;code = 116
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char = a;code = 97
char = c;code = 99
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char = d;code = 100
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char = A;code = 65
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char = c;code = 99
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char = l;code = 108
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char = g;code = 103
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char = u;code = 117
char = p;code = 112
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char = o;code = 111
char = f;code = 102
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char = t;code = 116
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char = b;code = 98
char = l;code = 108
char = e;code = 101
char = a;code = 97
char = c;code = 99
char = h;code = 104
char = e;code = 101
char = d;code = 100
char = .;code = 46
char = ;code = 32
char = C;code = 67
char = a;code = 97
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char = c;code = 99
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char = m;code = 109
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char = o;code = 111
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char = p;code = 112
char = t;code = 116
char = i;code = 105
char = o;code = 111
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char = ;code = 32
char = s;code = 115
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char = e;code = 101
char = c;code = 99
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char = h;code = 104
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char = o;code = 111
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char = e;code = 101
char = t;code = 116
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char = ;code = 32
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char = m;code = 109
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char = n;code = 110
char = t;code = 116
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char = o;code = 111
char = f;code = 102
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char = C;code = 67
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char = r;code = 114
char = a;code = 97
char = c;code = 99
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char = e;code = 101
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char = ;code = 32
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char = m;code = 109
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char = e;code = 101
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char = p;code = 112
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char = o;code = 111
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char = i;code = 105
char = c;code = 99
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char = a;code = 97
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char = i;code = 105
char = d;code = 100
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char = a;code = 97
char = f;code = 102
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char = e;code = 101
char = r;code = 114
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char = t;code = 116
char = h;code = 104
char = e;code = 101
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char = a;code = 97
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char = i;code = 105
char = o;code = 111
char = n;code = 110
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char = o;code = 111
char = f;code = 102
char = ;code = 32
char = 3;code = 51
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char = %;code = 37
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char = c;code = 99
char = a;code = 97
char = r;code = 114
char = b;code = 98
char = a;code = 97
char = m;code = 109
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char = d;code = 100
char = e;code = 101
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char = d;code = 100
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char = .;code = 46
char = ;code = 32
char = T;code = 84
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char = e;code = 101
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char = y;code = 121
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char = f;code = 102
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char = e;code = 101
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char = C;code = 67
char = a;code = 97
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char = l;code = 108
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char = t;code = 116
char = i;code = 105
char = m;code = 109
char = e;code = 101
char = -;code = 45
char = p;code = 112
char = o;code = 111
char = i;code = 105
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char = s;code = 115
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char = d;code = 100
char = ;code = 32
char = t;code = 116
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char = a;code = 97
char = t;code = 116
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char = r;code = 114
char = ;code = 32
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char = u;code = 117
char = s;code = 115
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char = b;code = 98
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char = ;code = 32
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char = i;code = 105
char = o;code = 111
char = n;code = 110
char = ;code = 32
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char = ;code = 32
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char = e;code = 101
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char = d;code = 100
char = ;code = 32
char = p;code = 112
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char = e;code = 101
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char = l;code = 108
char = e;code = 101
char = a;code = 97
char = c;code = 99
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char = i;code = 105
char = n;code = 110
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result sql = The aim of this study was to measure the demineralization capacity of 37% phosphoric acid on bovine enamel at different time-points after bleaching with 30% carbamide peroxide. Five, 4 x 4-mm sections were obtained from the enamel of 10 bovine incisors. After applying 30% carbamide peroxide (Vivastyle) for 90 min, specimens were stored in artificial saliva for 0, 24, 72 h, or 7 d and then immersed in 37% phosphoric solution. At 15, 30, 60, 90, and 120 s, 5-ml aliquots were extracted. A control group of specimens was not bleached. Ca(2+) concentrations were measured by atomic absorption spectrophotometry. A larger amount of Ca(2+) was extracted from enamel by phosphoric acid after the application of 30% carbamide peroxide. Twenty-four hours after bleaching, significantly more Ca(2+) was extracted from bleached than from control specimens at all time-points, and this greater susceptibility to the action of the acid persisted for at least 1 wk after bleaching.

Publication: Eur. J. Oral Sci. 2008 Feb ;116(1)::66-71. :doi: 10.1111/j.1600-0722.2007.00497.x.
Publication Date: 2008 Feb
Study Author(s): de Medeiros, Carmen L S G;González-López, Santiago;Bolaños-Carmona, Maria V;Sanchez-Sanchez, Purificación;Bolaños-Carmona, Jorge;
Institution: Department of Restorative Dentistry, University of Paraiba, Campina Grande, Brasil.
Shortcut link to this study:
The aim of this study was to measure the demineralization capacity of 37% phosphoric acid on bovine enamel at different time-points after bleaching with 30% carbamide peroxide. Five, 4 x 4-mm sections were obtained from the enamel of 10 bovine incisors. After applying 30% carbamide peroxide (Vivastyle) for 90 min, specimens were stored in artificial saliva for 0, 24, 72 h, or 7 d and then immersed in 37% phosphoric solution. At 15, 30, 60, 90, and 120 s, 5-ml aliquots were extracted. A control group of specimens was not bleached. Ca(2+) concentrations were measured by atomic absorption spectrophotometry. A larger amount of Ca(2+) was extracted from enamel by phosphoric acid after the application of 30% carbamide peroxide. Twenty-four hours after bleaching, significantly more Ca(2+) was extracted from bleached than from control specimens at all time-points, and this greater susceptibility to the action of the acid persisted for at least 1 wk after bleaching.
PMID: 18186734

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