|0769 Herbst Appliance Skeletal Effects: a Systematic Review|
G.A. BARNETT, D.W. HIGGINS, P.W. MAJOR, and C. FLORES-MIR, University of Alberta, Edmonton, Canada|
Objective: To evaluate skeletal changes produced by the crown- or banded- type Herbst appliance in growing class II division 1 malocclusion cases. Methods: Several electronic databases (Pubmed, Medline, Medline In-Process & Other Non-Indexed Citations, Cochrane Library Database, Embase, Web of Sciences, Scopus and Lilacs) were searched with the help of a Health Sciences librarian, without language limitation. References from the selected articles were also hand searched. Abstracts which appeared to fulfill the initial selection criteria (Herbst use and clinical trial) were selected by consensus and their original articles were then retrieved. Clinical trials which assessed through lateral cephalograms immediate skeletal changes with the use of either crown- or banded- Herbst appliances without other simultaneous potentially growth-modifying appliances or surgical were finally selected. A comparable untreated class II division 1 malocclusion control group was required to factor out normal growth changes. Results: Only four articles meet the selection criteria. Reduction of ANB angle and an increase in the mandibular plane angle were reported. There were mixed findings as to mandibular sagittal length and position and increases in lower face height, both anteriorly and posteriorly. Only two statistically significant changes were noted in the sagittal length or position of the skeletal maxilla of the nine reported. Conclusions: Skeletal changes in the correction of class II division 1 malocclusions with the crown- or banded- Herbst appliance appear to come more from the mandible than maxilla.
|Seq #100 - Malocclusion 1|
2:00 PM-3:15 PM, Thursday, March 22, 2007 Ernest N. Morial Convention Center Exhibit Hall I2-J