A method of retaining corrected teeth after orthodontic treatment by means of an etched labial surface retainer in the maxillary arch is described. An 0.017 inch “spiral” wire is used. Since this is a soft, multistranded wire, it may bc bent as required. It should extend from canine to canine. It must be completely passive and made to lie over the middle third of the labial surface of the teeth involved. Insets and offsets are required in many cases. Vertical adjustment between teeth may also be necessary. It is recommended that the ends be bent around the incisal edges. This adds to the retention and indicates which are the left and right sides of the retaining wire. The teeth are isolated, polished with pumice, and etched. After drying, the labial surface is painted with fissure sealant. and this is allowed to set. The composite is then mixed and, with a flat plastic instrument. is placed on the labial surfaces of all six teeth. The retainer wire is bedded into this. A new mix is then applied to cover the wire entirely and is contoured so that there are no sharp steps from tooth to composite, especially cervically. By this means, a veneer covers the labial surface masking the wire retainer.
Orthodontic Derek
Tooth
Movement
of a Transplanted
Canine:
A Case Report
See1
Br. .I. Orthod.
5: 21 l-212,
Octohrr.
IY7X
The right upper canine was located radiographically as being in a poor position in the palate. At surgery the canine was completely removed from the palate, then repositioned and splinted for 6 weeks by means of wires and acrylic to the orthodontic arch wire. It was recognized that excess space persisted. Further multibanded treatment in the upper arch was carried out to close the spaces and improve the buccal occlusion. These movements, which included bodily translation of the transplanted canine, were completed by means of an edgewise appliance over a period of 16 months. After retention the canine showed an intact lamina dura, but with some apical resorption. The tooth showed a vital response to electric pulp testing, a normal color, and minimal gingival pocketing.
Variation in Dental Occlusion and Arches Among Melsnesians of Bougainville Island, Papua New Guinea. I. Methods, Age Chenges, Differences and Population Comparisons Richard Am. J. Phw.
J. Smith Anthropol.
and Howard 47:343,
Sex
L. Baitit
September,
1977
Measurements were taken from the dental casts of 3 19 male and 359 female Melanesians from Bougainville, Papua New Guinea. The cross-sectional age changes from 12 to 68 years included an increase in intermolar arch width, a decrease in arch length and intercanine arch width, and increased crowding and malalignment. Neither age nor sex accounted for a large proportion of the differences among individuals. When compared to