TIPS
FROM
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READERS
incision through the baseplate is neat and precise. Marring of the cast by the blade is minimal. The instrument can be tilted to produce an upward-facing bevel on the remaining baseplate. Heat transfer to the wax-up from the instrument is slight and is localized to the working site. The palatal portion may be replaced with a uniform thickness of baseplate wax or with an anatomical form, if desired. A similar instrument, the X-Act0 model No. 73780 (Hunt Mfg. Co., Statesville, N.C.) may also be used, but it is not as easy to guide with precision because of its greater bladeto-grip length.
An dternate
method
of packing
REFERENCES 1. The American Board of Prosthodontics. A study and procedural guide for the certification process. Atlanta: The American Board of Prosthodontics; 24. 2. Morrow R, Rudd K, E&man H. Dental laboratory procedures, vol 1. Complete dentures. St. Louis: CV Mosby, 1980:258-9. Reprint requests to: DR. THOMAS P. TRESKA DEPARTMENT OF VETERANS AFFAIRS MEDICAL CENTER 30TH AND EUCLID DES MOINES, IA 50310
casts for transport
David S. Palmer, DMDa U.S. Air Force Hospital Chanute, Chanute AFB, Ill. Standard shipping boxes for dental casts protect unmounted casts very well. Techniques for improving the safety of the casts have been suggestedl; however, when the casts are mounted onto articulator rings, space available in the boxes is often inadequate. In addition, dies of prepared teeth or diagnostic wax-ups may be fragile and may be damaged during movement against the stiff foam packing material. The following technique allows one mounted or waxed cast to be packed in each box. This technique protects the occlusal surfaces of the cast by suspending these surfaces in air. The cast is held by compression of the packing foam against the articulator ring and either the palatal or sublingual area, which leaves the teeth generally untouched.
TECHNIQUE Cut the intermediate foam partition on one side of a standard cast mailing box (Fig. 1). Compress the cut partition with a finger (Fig. 2) and place the cast so that
The opinions or assertions contained in this article are those of the author and are not to be construed as official or as reflecting the views of the Department of the Air Force or the Department of Defense. aLieutenant Colonel, U.S. Air Force, DC, Chanute AFB. 10/4/37926
Fig.
Fig. THE
JOURNAL
1. Cutting
OF PROSTHETIC
foam DENTISTRY
partition.
Fig.
2. Compressing
cut partition.
3. Cast in place for transport. 563
TIPS
it is held in place by the compression of the foam partition against the palate or sublingual area (Fig. 3). This technique allows safer and more inexpensive transport and mailing of fragile wax-ups and oversized mounted casts.
FROM
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READERS
Reprint requeststo: DR. DAVID S. PALMER CHANUTE TTC HOSPITAL/SGD CHANUTE AFB IL 1X868-5300
REFERENCE I. Nelson DR. Minimizing 1984;52:141.
damage to casts in the mail. J PROSTHET DENT
CORRECTION
In the article by Goldstein et al., entitled “Flexion partial
denture
frameworks
using holographic
characteristics of four-unit interferometry” (J PROSTHET
fixed DENT
1992;67:609-13), there was an error on page 611 in Table I. Group PP-MP should have had two asterisks (**) under the heading “Stat. sig. subsets” with a footnote indicating the differentiation from the other groups.
564
SEPTEMBER
1992
VOLUME
68
NUMBER
3