fa Cross Sectional: Normal Maximal Incisal Opening and Associations with Physical Variables in Children کودکان Pediatric Dentistry پژوهشي Research <p> <strong>Purpose:</strong></p><p>  The purpose of this investigation was to establish a normal range of maximal incisal opening (MIO) in children, and the correlation between MIO with age, height, weight, gender, race, and molar relationship. </p><p> <strong>Methods:</strong> </p><p> Calibrated examiners used the TheraBite Range of Motion (ROM) scale to obtain two MIO readings from 500 enrolled subjects, accounting for overbite or open bite. The subject's height, weight, molar relationship, age, gender, and race were recorded. Subjects were stratified according to age, and mean MIO ± standard deviation for each age group was determined. </p><p> <strong>Results:</strong></p><p>  Mean MIO was positively correlated with age (P<.001), height (P<.001), weight (P<.001), and race (P<.001). However, height became insignificant in the multivariable regression model. On average, MIO of African-Americans was 3.66 mm larger than Whites (P<.001), and MIO of Hispanics/Latinos was 2.52mm greater than Whites (P<.001). There was no statistically significant association with left or right molar relationships (P=.07, P=.26 respectively) or gender (P=.58). </p><p> <strong>Conclusions:</strong> </p><p> TheraBite ROM scale is a practical tool to clinically measure MIO. MIO mimics somatic growth, peaking at age 12-13 years for females and 14-15 years for males. African-Americans and Hispanics/Latinos have a greater mean MIO than Whites. The established norms will be useful in diagnosis and treatment. </p><hr><p></p><p> <strong>Source: </strong>Journal of American Academy of ‍ Pediatric Dentistry</p><p> <a href="http://www.ingentaconnect.com/content/aapd/pd/2013/00000035/00000001/art00012jsessionid=u5n10ezntvyo.alexandra" target="_blank"><font color="#0000ff">Full Text</font></a></p> BIOSTATISTICS; GROWTH AND DEVELOPMENT; ORTHODONTICS 0 0 http://idai.ir/browse.php?a_code=A-10-32-2525&slc_lang=fa&sid=1 Quyen Vu Ying 100319475328460012006 100319475328460012006 Yes School of Public Health, Boston University, Boston, Mass., USA Janine Bacic 100319475328460012007 100319475328460012007 No School of Public Health, Boston University, Boston, Mass., USA Shelly Abramowicz 100319475328460012008 100319475328460012008 No Oral and Maxillofacial Surgery, Harvard School of Dental Medicine, Boston, Mass., USA; Department of Plastic and Oral Surgery, Boston Children's Hospital, Boston, Mass., USA Andrew Sonis 100319475328460012009 100319475328460012009 No Harvard School of Dental Medicine, Boston, Mass., USA; Department of Pediatric Dentistry, Boston Children's Hospital, Boston, Mass., USA