Percentiles relative to maxillary permanent canine inclination by age: a radiologic study. American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics [Am J Orthod Dentofacial Orthop] Journal article | | Title | Percentiles relative to maxillary permanent canine inclination by age: a radiologic study. | | Author(s) | Alessandri Bonetti G, Zanarini M, Danesi M, Parenti SI, Gatto MR | | Institution | Department of Orthodontics, Alma Mater Studiorum University of Bologna, Bologna, Italy. giulio.alessandri@unibo.it | | Source | Am J Orthod Dentofacial Orthop 2009 Oct; 136(4):486.e1-6; discussion 486-7. | | Abstract | INTRODUCTION: Few studies have investigated developmental norms for maxillary permanent canine eruption. In this observational cross-sectional study, we aimed to provide an age-related description of the percentiles relative to canine inclination in a large sample of nonorthodontic patients. Associations between inclination and sector were also analyzed.
METHODS: Canine inclination and sector location were measured on 1020 panoramic radiographs obtained from subjects of white ancestry aged between 8 and 11 years not seeking orthodontic treatment. The total sample comprised 2037 canines.
RESULTS: Canine inclination increases between 8 and 9 years and decreases between 9 and 11 years. The greatest value for each percentile is at 9 years. A linear model should be hypothesized for differences in canine inclination between 2 successive ages in correspondence to each percentile. The proportion of sector 2 canines decreases and that of sector 1 increases with age. In the same age group, the inclination generally decreases as the sector decreases.
CONCLUSIONS: Percentiles by age show the average canine inclination in a certain population. Further studies are required to verify whether percentiles can be a diagnostic aid for determining normal canine inclination at a given age and for quantifying the risk of canine impaction or adjacent root resorption. | | Language | eng | | Pub Type(s) | Journal Article
| | PubMed ID | 19815142 |
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