Within the past year, JCO conducted an extensive online survey of both current and former subscribers, generating direct feedback on just what they like or dislike about our journal. Even on the basis of informal communications with our readers over the years, all of us on the editorial board had a strong sense that Pearls were among JCO's most popular features. Our more scientifically conducted online survey only confirmed that impression. As a result, we have decided to increase our emphasis on publishing Pearls - the eventual objective is to include one in each issue - while continuing to improve the quality and utility of these orthodontic gems.
Distalization of the upper molars is an important treatment option for the correction of Class II malocclusion. Although extra- or intraoral devices have traditionally been used in such cases, the esthetic and social concerns associated with headgear and the undesirable anchorage loss caused by intraoral devices have prompted clinicians to investigate the possibility of using miniscrew implants as anchorage devices. Most of the miniscrew-supported intraoral appliances used to distalize the upper molars are adaptations of preexisting non-compliance devices, such as the Distal Jet or Pendulum, anchored to miniscrews in the paramedian palate or midpalatal suture. Although these appliances are capable of producing significant distal molar movement, they are difficult to fabricate and, when palatal acrylic buttons are used, tend to impede oral hygiene.
Gingival recession may be localized or generalized, but always involves at least one tooth surface. It occurs more often in the mandibular arch than in the maxillary arch. Gingival displacement can become a critical complication, leading to esthetic complaints, root sensitivity, loss of periodontal attachment, difficulty in performing oral hygiene, and increased risk of root caries. Exposed root surfaces are also more prone to abrasion from brushing.
The canines have the highest reported incidence of dental transposition - most commonly with the first premolar, followed by the lateral incisor. Several authors have described cases in which canine transpositions were resolved or the teeth were aligned in their transposed positions. To our knowledge, however, no one has reported treating a patient in whom bilaterally impacted upper canines were transposed with the lateral incisors and were also associated with severe root resorption of adjacent teeth. Canine transposition is one of the most common causes of tooth resorption. Typically, an upper lateral-incisor root is affected by ectopic eruption of the adjacent canine, although central incisors can also be involved. The apical and middle thirds of the incisor roots are most likely to be resorbed.
Various types of rapid maxillary expanders have been introduced; while they all have their advantages and disadvantages, each is built around an expansion screw in the palatal area. This article describes a different approach to the orthopedic treatment of a maxilla with transverse bone deficiency. A vestibular expander called the was developed to address some of the drawbacks of traditional expanders and to optimize the disjunctive action of the appliance during its entire period of use in the oral cavity.
Protraction of a lower molar through an edentulous space is particularly challenging. Archwire bends alone are often unable to prevent tipping and rotation of the molar. This Pearl offers a simple technique that provides lingual support during lower-molar protraction, thus improving the efficiency of space closure and avoiding unwanted tooth movement. NEAL D. KRAVITZ, DMD, MS Associate Editor for Pearls
Returning to Orlando for the first time since 2004, this year's AAO conference promises a number of novel experiences besides new rides in the city's ubiquitous theme parks. Here is our annual guide to attractions, events, and restaurants in the host city during the convention, taking place April 29-May 3. Although Florida is generally warm in late April, with highs in the 80s and lows in the 60s, it can also be quite wet. Plan for afternoon thundershowers. At Orlando International Airport, ground transportation can be found on Level 1 of either terminal, A or B. Taxi fares run around $40 one way to the Orange County Convention Center area (International Drive), with shared shuttles available for about half that price. The LYNX bus service (www.golynx.com) is only $2 per person, but takes about an hour to reach the convention center.
Click here to download a PDF of the Product News column for February 2016.See also the Online Product News page of our website for a searchable data base of published Product News items for the past s...
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