Scientific Articles 
The Effect of Supplemental Oxygen on Apnea and Oxygen Saturation During Pediatric Conscious Sedation 
By Gall K. Rohlfing, Diane C. Dilley, Warner J. Lucas, William F. Vann, Jr

Clinical Evaluation of New Designs for Intraoral Fluoride-releasing Systems 
By Ronald J. Billings, Steven M. Adair, Carol P. Shields, Mark E. Moss

Effect of Etching on Leakage of Sealants Placed After Air Abrasion 
By Daniel Zyskind, Karin Zyskind, Zvia Hirschfeld, Anna B. Fuks

Bacteremia of Dental Origin and Antimicrobial Sensitivity Following Oral Surgical Procedures in Children 
By Graham J. Roberts, Rosamund Watts, Peter Longhurst, Paul Gardner

The Effects of Acid-Etching on Enamel From Different Clinical Variants of Amelogenesis Imperfecta: An SEM Study 
By W. Kim Seow, A. Amaratunge

Antibacterial Properties of Current Orthodontic Band Cements 
By Robert P. Vokus, George J. Cisneros, Michael Levi

A Comparison of a Hybrid Light-cured Glass-ionomer Base and Liner Versus a Light-cured Resin Tooth Fragment Attachment 
By Jeffrey A. Dean, Anthony L. Minutilio, B. Keith Moore

Case Reports 
Unilateral Delayed Eruption of Maxillary Permanent First Molars: Four Case Reports 
By Mieko Tomizawa, Hiroko Yonemochi, Misako Kohno, Tadashi Noda

Oral Aspects and Management of Severe Graft-versus-host Disease in a Young Patient With ß-thalassemia: Case Report 
By Marcio A. da Fonseca, Mark Schubert, Michele Lloid

Editorial 
Time to Stop Smoking 
By Milton I. Houpt