American Orthodontist Volume 1-3
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1907 edition. Excerpt: ...to the average. The medium sized D band will admit of most beautiful adjustment on the average molar, or even this whole middle group, --at least such is my experience, and needless to say the experience of Dr. Angle. The D band, as it comes to us, has the buccal tube attached in the center of the band--considered from end to end--which admits of a wide range of adaptation. As a rule, the buccal tube should be aligned parallel to the line of the buccal cusps of the anchor tooth; and in this position there should be no difficulty in placing the nut of the clamp screw in its proper place, while the screw itself projects forward and is in contact with the lingual surface of the tooth interior to the anchor tooth. As molars vary in size, there will be a slight variation in the position of the clamp nut, but this is immaterial. One other point with regard to the position of the tube. Our essayist states that where there is much expansion required in the molar region, the tube should be placed as near as possible to the gingival border of the band, as this prevents, somewhat, the tipping of the molar or anchor tooth. I seriously question the correctness of that statement. The tissues surrounding the roots of the tooth offer the resistance to tooth movement, and resistance to bodily movement must be greatest at the apex. When the force of the arch is applied, the play of the arch in the buccal tube is in the nature of a swivel, or hinge, and cannot effect the movement of the apex of the root in the direction of the buccal side--or outward. Now, whether the tube is placed in the middle of the D band, or whether it is soldered at the gingival border--a difference of 5 or 6 i/i00 of an inch, does not alter the manner in which the force is applied--through a..
- Paperback | 222 pages
- 189 x 246 x 12mm | 404g
- 04 Jul 2012
- Miami Fl, United States
- Illustrations, black and white