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March 1996
Volume 30, Issue 3

THE EDITOR'S CORNER

Rational Expectations I

EUGENE L. GOTTLIEB, DDS

Rational Expectations I Robert Lucas was recently awarded a Nobel Prize in economics for a theory he calls "rational expectations". Lucas was referring to monetary theory of the business cycle, but hi...

129

Pure Titanium Orthodontic Brackets

DAVID W. HAMULA , DDS, WARREN HAMULA, DDS, MSD, FRIEDRICH SERNETZ, MS, PHD

Today, orthodontists must question whether the materials they place in the mouth are as biocompatible as they should be. Saliva is an active environment of organic constituents, ions, and non-electrol...

140

A Technique to Prevent Surface Contamination of Etched Enamel

KYLE S. GREER, DMD, STEVEN J. LINDAUER, DMD, MDSC, STEVEN G. DARLING, DMD, HENRY BROWNING, PETER C. MOON, MS, PHD

I t has been recommended that a thin layer of primer be applied to the entire etched enamel surface before bonding to seal the enamel, protect it from decay, and provide maximum bond strength.1-3 If t...

145

Twist Ligation: A Technique to Reduce Archwire Binding

DANIEL J.J. POLLIT, DDS, DO, MSC

Differential anchorage is necessary when sliding mechanics must be applied asymmetrically. There is probably a linear relationship between stress (force per unit area) and tooth movement.1 However, be...

150

PEARLS

Removing Bonded Retainers

RICHARD KARLSON, DDS

Here is an easy technique for removing a bonded maxillary 3-3 retainer with multiple pads. Instead of grinding with a diamond bur or struggling with debonding instruments, use a Jarabak or similar lon...

154

PEARLS

Predictable Finishing Wires

JAMES A. BOND, DDS

After many years of finishing my .018"-slot, preadjusted-bracket cases with .016" x .022" archwires for three-dimensional force control, or round wires to allow settling, I have found that .017" x .01...

155

A Fixed Appliance for Maxillary Expansion, Molar Rotation, and Molar Distalization

DAVID J. SNODGRASS, DDS

Maxillary arch constriction and mesiopalatal rotation of the upper first molars are two components of most Class II malocclusions that must be corrected either before or during sagittal correction. Th...

156

CLINICAL AID

Improved Visibility with the Dry Field System

MAURICE J. COSTELLO, BDSC, MDSC, FRACDS

With the Nola Dry Field System (Fig. 1A), a dental mirror is usually required for good visualization from the occlusal, especially when bonding the upper posterior teeth. Sliding an intraoral photogra...

168

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