A practical treatise on the technics and principles of dental orthopedia and prosthetic correction of cleft palate . s or arch-bows for communicating the force, and thusprevent, as far as possible, the slightest inclination movement of the anchorages. A principle which the author presented at the meeting of the American DentalAssociation in 1907, for sustaining a single molar anchorage is as follows: Instances frequently arise where only one tooth can be used for an anchorageon one or both sides of the mouth. These teeth not being supported by the adjoin-ing teeth will readily tip if not prope
A practical treatise on the technics and principles of dental orthopedia and prosthetic correction of cleft palate . s or arch-bows for communicating the force, and thusprevent, as far as possible, the slightest inclination movement of the anchorages. A principle which the author presented at the meeting of the American DentalAssociation in 1907, for sustaining a single molar anchorage is as follows: Instances frequently arise where only one tooth can be used for an anchorageon one or both sides of the mouth. These teeth not being supported by the adjoin-ing teeth will readily tip if not properly sustained. In fact, a molar tooth that isallowed to tip will offer but little more resistance to force than a premolar, but ifsustained in an upright position its bodily stability will greatly increase its re-sistance to movement. When a single isolated molar is used for an ancnorage attach-ment, the band should be wide and thick, fitted and cemented as carefully as a crown,with rigid attachments for inflexible extensions. However perfect the band and its 124 PART rV. TECHNIC PRINCIPLES OF PRACTICE Fig. attachments, if a flexible traction wire is used to transfer the power, no obstructionis offered to the tipping tendency of the molar. The same is true with an inflexiblepower rod if the band is thin, narrow, and yielding, or in any way movable uponthe tooth, or if the power tube is short and loosely fitted to the rod. Where great immobility of asingle anchorage tooth is required,use for banding material nickel sil-ver or platinized gold, .0035 thick,and as wide as the tooth will this is contoured and fitted,solder to the buccal surface a longbearing power tube at the gingivalmargin. See Fig. 70. The power tube should extendforward to the first premolar restingupon narrow projecting hooks solder-ed to the premolar bands, as will add greatly to the stability of the anchorage. It will be seen that anytendency of the molar to tip forward will carry t
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