Page 131 - REMOVABLE ORTHODONTIC APPLIANCES

124 Index
Retraction, Stability of springs, 17
canines, 50, 70 Stability ratio, of buccal canine springs, 17
first molars, 52 Stainless steel wire, properties of, 15
premolars, 51 Study models, 86
forces for on canines, 16 Supported buccal canine spring, 18
incisors, 71 Supported buccal retractor, 22
Reverse loop buccal retractor, 23 Supra-alveolar connective tissue, 12
Reverse loop labial bow, 26, 27
Roberts' retractor, 24 T springs, 18, 20
activation of, 99 activation of, 100
Rotations, 5, 8 Tipping, 4, 8
derotation of upper central incisor, 56 bucco-lingual, 5
pericision after, 14 forces used in, 13
relapse after, 14 mesio-distal, 5
movement in plane of long axis, 9
Screws, 27 Tissue changes during tooth movement, 11
developments in designs, 113 Tongue,
Self-straightening wires, 26 effect on tooth position, 2
Single cantilever spring, 19 thrust, 64
Skeletal patterns, 77,78 Tooth movements, 8, 9
Soft tissues, 64 biochemical aspects of, 12
Soldered auxiliary spring, 23 capillary blood pressure, 11
Southend clasp, 33 direction of and active components, 18
Space closure in class I malocclusions, 49 forces used in, 13
Space maintainers in class I malocclusions, measurement of, 94
47 satisfactory progress with, 95
Space opening in class I malocclusions, 48 unwanted, 95
Spontaneous movements, Traumatic tooth loss, 108
eruption guidance, 2 Twin screw appliance, 73
mesial migration, 3
timing of, 4 U loop labial bow retainer, 103
Springs, U loops, 25
activation, 16 Undercuts,
adjustment, 20 appliance fit, 93
apron, 24 in children, 30
Bauschinger effect, 15 lower removable appliances for, 57
buccal, 58 problems in adults with, 31
buccal canine, 17 Unilateral crowding, 109
coffin, 21 Unsupported buccal canine spring, 18
construction, 19 Upper arch contraction, 56
design of, 58 Upper arch expansion, 55
guard wires for, 19 Uprighting, 2
insertion and comfort of, 18
light wires, activation of, 99 Vacuum-formed retainers, 103
Ungual, 58
mechanics of, 16 Wind instruments, 117
palatal, 19 Wire bending pliers, 87
recommended wire diameters, 119 Wire diameters, 119
stability of, 17 Wire fractures and repairs, 116
T spring, 20
unsupported, 18 Z springs, 20
Z spring, 20 activation of, 100