Interfacial behavior of Proteinase K enzyme at air-saline subphase.

This study investigates the interfacial behavior of the proteinase K enzyme at air-water interface. Adsorption of enzyme on the surface was induced using saline subphase. The surface packing and stability of the enzyme was investigated using of surface pressure-area (π-A) and surface potential-area (ΔV-A) isotherms.

Mandibular micrognathia and vertical maxillary excess correction with combination LeFort I and inverted L osteotomies.

A 34-year-old woman with mandibular micrognathia, vertical maxillary excess, and an open bite characterized by a "bird-face" deformity was treated with orthodontics combined with LeFort I and bilateral inverted L osteotomies. The total treatment time was 16 months. Her occlusion and facial appearance were significantly improved by a surgical-orthodontic plan.

Anterior open bite correction with 2-jaw orthognathic surgery.

A 26-year-old man with an anterior open bite was treated with orthodontics combined with 2-jaw surgery. Total treatment time was 19 months. Both his occlusion and facial appearance were significantly improved by the surgical-orthodontic treatment.

Evaluation of American Board of Orthodontics certification protocols in postgraduate orthodontic programs in the United States and Canada.

Introduction: The objective of this study was to identify the board certification protocols that hospital and university-based postgraduate orthodontic programs have in place to prepare residents for the American Board of Orthodontics (ABO) certification examination.

Methods: An electronic survey was sent to the program directors of each of the 72 postgraduate orthodontic programs in the United States and Canada. The survey consisted of 49 questions about demographics, resident case assignment protocols, and ABO examination preparation methods.

Accuracy of digital American Board of Orthodontics Discrepancy Index measurements.

Introduction: A digital analysis that is shown to be accurate will ease the demonstration of initial case complexity. To date, no literature exists on the accuracy of the digital American Board of Orthodontics Discrepancy Index (DI) calculations when applied to pretreatment digital models.

Methods: Plaster models were obtained from 45 previous patients with varying degrees of malocclusion.

Orthodontic management of dentofacial skeletal deformities.

The treatment of complex malocclusions with overriding skeletal discrepancies requires an exceptional amount of pretreatment planning. The roles of the orthodontist and the surgeon are equally important. Sufficient input from each member of the orthognathic surgical team is necessary before any patient care is delivered.

A report of the ABO Resident Clinical Outcome Study (the pilot study).

Introduction: A 4-year collaborative project between the American Board of Orthodontics (ABO) and 15 American orthodontic graduate programs concluded at the ABO Clinical Examination in February 2006.

Methods: Fifty recent graduates (the pilot study group) presented cases that were treated in their graduate programs as partial fulfillment of the requirements for ABO certification. The examinees were tested by calibrated ABO examiners and required to satisfy traditional ABO standards.

The American Board of Orthodontics: Diplomate recertification.

Although some specialty certifying boards began recommending or requiring recertification of their "boarded" specialists as early as 1986, recertification is a relatively new concept for the specialty of orthodontics. In the mid 1990s, the American Board of Orthodontics (ABO) recognized that many other medical and dental specialty boards had already established voluntary or mandatory recertification policies and decided to establish its own time-limited certifying policy. After a series of field tests involving former directors, council members of the College of Diplomates of the ABO, and volunteer diplomates, the ABO instituted a recertification policy for candidates who applied for initial certification after January 1, 1998.

The ABO discrepancy index: a measure of case complexity.

A criterion for determining the acceptability of a case presented for the American Board of Orthodontics (ABO) Phase III clinical examination is case difficulty. Case difficulty can often be subjective; however, it is related to case complexity, which can be quantifiable. Over the past 5 years, the ABO has developed and field-tested a discrepancy index, made up of various clinical entities that are measurable and have generally accepted norms.