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April 2025
Volume 59, Issue 4

THE EDITOR'S CORNER

The Dunning-Kruger Effect

NEAL D. KRAVITZ DMD, MS

The Dunning-Kruger effect is a cognitive bias, or thinking error, that leads individuals with low competence to overestimate their abilities. Identified by psychologists David Dunning and Justin Kruge...

225

MASTER CLINICIAN

Junji Sugawara, DDS, PhD

JUNJI SUGAWARA DDS, PhD, PETER M. SINCLAIR DDS, MSD

In this wide-ranging interview with Dr. Peter Sinclair, Dr. Junji Sugawara delves into his education, influences, and orthodontic philosophy as he recounts the history of the Skeletal Anchorage System and the Sendai “surgery first” method.

227

Practical Invisalign Mechanics: Deep Bite and Class II Correction

BARRY GLASER DMD

Dr. Glaser launches a series on ClinCheck planning for Invisalign treatment with an overview of common patterns found in Class II patients with deep bite and advice for correcting this type of malocclusion with clear aligners.

241

PEARLS

Inverted Elastomeric Ligatures with Guards for Lower-Lip Hypertonicity

NEAL D. KRAVITZ DMD, MS, CLAYTON ANDERSON

A hypertonic lower lip can press forcefully against the lower brackets, causing painful indentations in the mucosa. As a solution, this Pearl describes how to use upside-down elastomeric ligatures with guards to protect the soft tissue like a lip bumper.

249

DIAGNOSTIC CHALLENGE

Case #6, Part 1: Presentation

ALFRED LI DDS, MS, MONA BAJESTAN DDS, MS

In this monthly column, Contributing Editors Gayle Glenn, DDS, MSD, and Shawn L. Miller, DMD, MMSc, present a case to challenge your diagnosis and treatment-planning skills. Review the initial records...

251

CASE REPORT

Treatment of Mandibular Asymmetry with Distraction Osteogenesis in a Growing Patient

DAVID L. KORNMEHL DMD, CHRISTOPHER SOHN DMD, JAIRO A. BASTIDAS DMD, MAIRAJ K. AHMED DDS, MS

Drs. Kornmehl, Sohn, Bastidas, and Ahmed describe the use of distraction osteogenesis to elongate one side of the mandible in a young patient with significant facial asymmetry. Orthodontic treatment follows to correct the consequent lateral open bite and establish an ideal occlusion.

254

Lower Canine Autotransplantation Using a 3D-Printed Donor Tooth Model

BRUNO DI LEONARDO DDS, ROSSANO MURA DDS, LUCIA POZZAN DDS, MARCO MIGLIORATI DDS, MSc, PhD

Drs. Di Leonardo, Mura, Pozzan, and Migliorati detail the autotransplantation of a horizontally impacted lower canine into its proper position and present a procedure for using a three-dimensionally printed replica of the donor tooth to reduce extraoral time.

264

CASE REPORT

Spontaneous Eruption of a Retained Permanent Second Molar Using Glass Ionomer Open Exposure

OSAMA ALALI DDS, MSD, PhD

Dr. Alali describes the case of a 13-year-old patient with primary retention of a lower second molar who was treated with the glass ionomer cement open exposure—or GOPEX—technique to promote spontaneous eruption of the tooth.

272

DIAGNOSTIC CHALLENGE

Case #5, Part 2: Treatment

SERGIO HERNAN VALVERDE MONTALVA DDS, MS

In this monthly column, Contributing Editors Gayle Glenn, DDS, MSD, and Shawn L. Miller, DMD, MMSc, present a case to challenge your diagnosis and treatment-planning skills. The initial records for th...

279

Product News in April 2025 Issue

PRODUCT NEWS is presented as a service to the reader and in no way implies endorsement by JCO.

284

Continuing Education from the April 2025 Issue (questions only)

Click here to download a PDF of the printed questions from the journal for reference. CE tests must be taken online. When you are ready, go here to take the quiz.

285

CASE REPORT

Extraction Treatment of a Gummy Smile with Lingual Orthodontics and Skeletal Anchorage

PAOLO ALBERTINI DDS, LUDOVICA ZUCCHINI DDS, ENRICO ALBERTINI DDS, ANDREA DOTTI DDS, LUCA LOMBARDO DDS, MS

In this case report, Drs. Albertini, Zucchini, Albertini, Dotti, and Lombardo manage a gummy smile with four premolar extractions and a lingual appliance, using two palatal miniscrews and power arms to reduce side effects during simultaneous anterior intrusion and retraction.

20250401

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