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September 1993
Volume 27, Issue 9

THE EDITOR'S CORNER

THE EDITOR'S CORNER

EUGENE L. GOTTLIEB, DDS

The 1993 JCO Orthodontic Practice Study The responses to the 1993 JCO Orthodontic Practice Study on economics and practice administration have been tabulated, and the first in a series of articles det...

469

Mushroom Spring for Minor Tooth Movement

BRENDAN J. BOYLAN, DDS, JOHN J. SHERIDAN, DDS, MSD

Spring forces are usually delivered through free-ended wires based in the acrylic body of a removable appliance. The efficiency of such an appliance depends on the diameter and configuration of the wi...

483

TECHNIQUE CLINIC

Simplified Quad Helix Construction

MAURICE J. COSTELLO, BDSC, MDSC, FRACDS

Lingual buttons can be used to stabilize a Quad Helix appliance as follows. Pre-weld lingual buttons to the molar bands on the model. Remove the gingival half of each lingual button with a diamond dis...

485

THE READERS' CORNER

PETER M. SINCLAIR, DDS, MSD

Topics include TMJ and practice newsletters.1. What percentage of your orthodontic patients would you estimate show TMJ signs or symptoms before treatment? during treatment? after treatment? Responses...

487

1993 JCO Orthodontic Practice Study, Part 1: Trends

EUGENE L. GOTTLIEB, DDS, ALLEN H. NELSON, PHD, DAVID S. VOGELS III

The questionnaire for JCO's seventh biennial survey of orthodontic economics and practice administration was mailed on Feb. 22, 1993, to all the U.S. orthodontic specialists who could be identified. W...

493

Rapid Class II Correction with a Headgear-Expander

DAVID W. WARREN , DDS

Since Haas introduced his rapid palatal expander,1,2 orthodontists have combined RPE appliances in various ways with other mechanics.3-7 This article will describe and illustrate a method of treating ...

503

A Practical Biteplane for Use with Fixed Appliances

CALVIN K. HEINRICH, DDS, MSD

Biteplanes are often used when bracket interference makes it difficult to bond the lower anterior or even the lower posterior teeth at the start of treatment. Biteplanes are also needed in many cases ...

508

Generalized Idiopathic External Root Resorption

AMY L. COUNTS, DDS, MSD, RONALD A. WIDLAK, DDS

Root resorption is not in itself an unusual finding; a slight amount of root resorption may be present in all secondary teeth.1 Although a patient may complain that a tooth has suddenly loosened, it c...

511

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