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May 2016
Volume 50, Issue 5

THE EDITOR'S CORNER

Acceleration Update

ROBERT G. KEIM DDS, EdD, PhD

Always a high point of my year, this year's annual session of the AAO in Orlando, Florida, was another triumph for the profession. The lectures were stimulating, the exhibits were informative, and the social activities were enjoyable. One topic that seemed to be on everybody's mind was that of accelerated orthodontics (AO).

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Differential Molar Intrusion with Skeletal Anchorage in Open-Bite Treatment

CHEOL-HO PAIK DDS, PhD, RYAN McCOMB DMD, MS, CHRISTINE HONG DMD, MS

Anterior open bite has been considered a complex malocclusion to treat because of the initial difficulty in closing the bite and the subsequent challenge of retaining bite closure. Proper diagnosis is necessary to develop an effective treatment plan with appropriate retention of the newly established bite.

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Treatment of Complications after Unintentional Tooth Displacement by Active Bonded Retainers

MORTEN GODTFREDSEN LAURSEN DDS, METTE RYLEV DDS, PhD, BIRTE MELSEN DDS, DrOdont

Maintenance after orthodontic treatment is often mistaken for stability of the post-treatment status. As stated by Oppenheim in 1934, "Retention is the most difficult problem in orthodontia; in fact, it is the problem". Bonded lingual retainers, which have become a standard part of retention protocol due to the relapse tendency of lower-incisor irregularity, have been shown to be effective in maintaining the alignment of the mandibular anterior region. Nevertheless, such retainers can loosen without being noticed or even be unintentionally activated, resulting in undesirable tooth displacement.

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BOOK REVIEW

Aligner Orthodontics: Diagnostics, Biomechanics, Planning and Treatment

Clear-aligner therapy has gained popularity since the advent of Invisalign, to the point that it is often requested by potential patients. Although some practitioners still question the accuracy of the technique, this book offers a detailed protocol of diagnosis and treatment planning designed to improve the efficiency of aligner therapy.

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CASE REPORT

Surgical Luxation and Orthodontic Traction of an Ankylosed Upper First Molar

MATHEUS MELO PITHON DDS, MS, PhD

Dental ankylosis is a cellular change in the periodontal ligament that results in continuity or fusion between the alveolar bone and cementum, making it impossible for a tooth to erupt completely. It is identified clinically by the failure of a tooth to erupt through the oral epithelium, by incomplete eruption, or by a lack of vertical movement compared with the adjacent teeth and the alveolar bone. Although ankylosis is more common in the primary dentition, it may also affect the permanent teeth, typically the molars. Bone defects are often associated, especially when ankylosis occurs during active vertical growth of the maxilla.

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PEARLS

Second-Molar Crossbite Correction with a Hairpin-Spring Appliance

YONG CHIANG BDS

Lower second molars commonly erupt into a lingual crossbite or "scissor bite". Traditional treatment involves banding or bonding a lingual attachment and running crossbite elastics to the upper second molars, but that method is cumbersome and dependent on patient compliance. This month's Pearl describes a hairpin-spring appliance that can efficiently correct a second-molar crossbite without the need for brackets or elastics.

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THE CUTTING EDGE

Invisalign Treatment Accelerated by Photobiomodulation

KENJI OJIMA DDS, CHISATO DAN DDS, YURIKO KUMAGAI DDS, WERNER SCHUPP DDS, PhD

This month's Cutting Edge article describes accelerated orthodontic treatment using photobiomodulation (PBM), a low-level light therapy that has been shown to accelerate bone and connective-tissue metabolism for wound healing in medicine. One commercially available PBM device, OrthoPulse, uses light-emitting diodes (LEDs) that produce 850 nanometers of light (very near the infrared spectrum), offering a safer mode of treatment than with laser light.

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Considerations Involved in Placing Miniscrews Near the Nasopalatine Bundle

LUIS HUANCA GHISLANZONI DDS, MS, PhD, FREDERICK BERARDINELLI DDS, MS, BJÖRN LUDWIG DMD, MSD, ALESSANDRA LUCCHESE DDS, MS

Miniscrews are now routinely used as a source of skeletal anchorage in orthodontic practice, with a high reported success rate. One of the safest and easiest areas in the upper arch to place miniscrews is the anterior palate, which offers the thickest bone in the entire region. Although there are no anatomical structures that can be damaged during miniscrew placement, the nasopalatine bundle (NPB) is close enough to the upper incisors to be contacted by a miniscrew, leading to complications such as non-osseointegration or sensory dysfunction.

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JCO Product News Published in May 2016

Click here to download a PDF of the Product News column for May 2016.See also the Online Product News page of our website for a searchable data base of published Product News items for the past severa...

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