Premium
Morphometric Characterization of Maxillary and Mandibular Interdental Spaces at the Mucogingival Junction: Implications for Safe Orthodontic Miniscrew Insertion
Author(s) -
Yang Jackie,
Tassi Ali,
Wilson Tim D,
Hosein Yara,
Galil Khadry
Publication year - 2016
Publication title -
the faseb journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.709
H-Index - 277
eISSN - 1530-6860
pISSN - 0892-6638
DOI - 10.1096/fasebj.30.1_supplement.1039.14
Subject(s) - interdental consonant , orthodontics , arch , medicine , calipers , mandibular canine , dentistry , diastema , crown (dentistry) , mandibular arch , mandible (arthropod mouthpart) , craniofacial , mathematics , biology , geometry , civil engineering , botany , psychiatry , engineering , genus
Interdental alveolar bony spaces of the maxillary and mandibular dental arches are common target site for orthodontic miniscrew insertion. The mucogingival junction is a clinically important anatomical landmark as miniscrews are inserted into the attached gingiva above it. Although numerous studies have measured interdental spaces to determine suitable minscrew insertion sites, none focus on the clinically relevant mucogingival junction. Further, there is little information regarding the potential relationship between craniofacial characteristics (linear mandibular measurement and dental arch shape) on size of the interdental spaces. The aim of this study is to assess the dimensions of interdental spaces at the mucogingival junction, and to investigate its relationship to the jaw size and dental arch shapes. Twenty bisected cadaveric heads were obtained from the Body Bequeathal Program in the Department of Anatomy and Cell Biology at Western University. Mandibular size of each specimen was measured using a digital caliper by two measurers on different days which demonstrated high interrater reliability for the linear mandibular measurements (r 2 = 0.99; p<0.001). Currently, the classification of the dental arch shape (oval, tapered, square) for each specimen using orthodontic templates is taking place. Lastly, the mandibular and maxillary arches will be isolated from the heads and cut just above the mucogingival junction towards crown of tooth along its transverse plane. A dissecting microscope will be used to measure interdental spaces (buccolingual and mesiodistal) and cortical bone thicknesses. It is expected that interdental spacing would be widest distally, and narrowest mesially. It is hypothesized that more tapered dental arches will exhibit smaller interdental spacing, while square dental arches would correlate to larger interdental spacing. The resulting data will benefit the orthodontists when deciding on safe placement site and size of orthodontic miniscrews.