Thin-plate spline analysis of craniofacial morphology in subjects with adenoid or tonsillar hypertrophy

Department of Orthodontics, University of Rome Tor Vergata, Italy.
International journal of pediatric otorhinolaryngology (Impact Factor: 1.19). 02/2011; 75(4):518-22. DOI: 10.1016/j.ijporl.2011.01.010
Source: PubMed

ABSTRACT To compare the skeletal features of subjects with adenoid hypertrophy with those of children with tonsillar hypertrophy using thin-plate spline (TPS) analysis.
A group of 20 subjects (9 girls and 11 boys; mean age 8.4 ± 0.9 years) with adenoid hypertrophy (AG) was compared with a group of 20 subjects (10 girls and 10 boys; mean age 8.2 ± 1.1 years) with tonsillar hypertrophy (TG). Craniofacial morphology was analyzed on the lateral cephalograms of the subjects in both groups by means of TPS analysis. A cross-sectional comparison was performed on both size and shape differences between the two groups.
AG exhibited statistically significant shape and size differences in craniofacial configuration with respect to TG. Subjects with adenoid hypertrophy showed an upward dislocation of the anterior region of the maxilla, a more downward/backward position of the anterior region of the mandibular body and an upward/backward displacement of the condylar region. Conversely, subjects with tonsillar hypertrophy showed a downward dislocation of the anterior region of the maxilla, a more upward/forward position of the anterior region of the mandibular body and a downward/forward displacement of the condylar region.
Subjects with adenoid hypertrophy exhibited features suggesting a more retrognathic mandible while subjects with tonsillar hypertrophy showed features suggesting a more prognathic mandible.

Download full-text


Available from: Antonella Polimeni, Jan 27, 2014
1 Follower
78 Reads
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: The aim of this study was to evaluate the differences in facial proportions of nose and mouth breathing children using cephalometric analysis. Transversal cohort. Sixty cephalometric radiographs from pediatric patients aged 6 to 10 years were used. After otorhinolaryngological evaluation, patients were divided into two groups: Group I, with mouth breathing children and group II, with nose breathers. Standard lateral cephalometric radiographs were obtained to evaluate facial proportions using the following measures: SN.GoGn, ArGo.GoMe, N-Me, N-ANS, ANS-Me and S-Go; and the following indexes: PFH-AFH ratio: S-Go/N-Me; LFH-AFH ratio: ANS-Me/N-Me and UFH-LFH ratio: N-ANS/ANS-Me. It was observed that the measurements for the inclination of the mandibular plane (SN.GoGn) in mouth breathing children were statistically higher than those in nasal breathing children. The posterior facial height was statistically smaller than the anterior one in mouth breathing children (PFH-AFH ratio). Thus, the upper anterior facial height was statistically smaller than the lower facial height (UFH-LFH ratio). We concluded that mouth breathing children tend to have higher mandibular inclination and more vertical growth. These findings support the influence of the breathing mode in craniofacial development.
    Brazilian journal of otorhinolaryngology 04/2005; 71(2):156-60. · 0.65 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: Dentists need to play a bigger role in managing airway development and craniofacial formation even though the relationship between the airway, breathing and malocclusion remains quite controversial. Certainly the airway, the mode of breathing and craniofacial formation are so interrelated during growth and development that form can follow function and function can follow form. So, it is imperative to normalize form and function as early as possible so that function is optimized for life.
    Today's FDA: official monthly journal of the Florida Dental Association 03/2010; 22(2):43-7.
  • [Show abstract] [Hide abstract]
    ABSTRACT: The effect o hypertrophic adenoid tissue on the position of the tongue, the mandible and the hyoid bone was investigated by comparing cephalometric measurements in 117 children, of average age 9 years 4 months, who were consistent mouth breathers with Class I malocclusions, and 56 children of similar age with ideal occlusion, good facial balance and no evidence of obstruction of the nasal airway. In the mouth breathers the tongue was positioned more forwards and downwards, the manidble showed a significant downward inclination and the hyoid bone appeared to follow the inclination of the mandibular plane.
    The European Journal of Orthodontics 12/1983; 5(4):287-94. DOI:10.1093/ejo/5.4.287 · 1.48 Impact Factor
Show more