title: Sella size and jaw bases - Is there a correlation???
abstract: BACKGROUND
  Sella turcica is an important cephalometric structure and attempts have been made in the past to correlate its dimensions to the malocclusion. However, no study has so far compared the size of sella to the jaw bases that determine the type of malocclusion. The present study was undertaken to find out any such correlation if it exists.
  
  
  METHODS
  Lateral cephalograms of 110 adults consisting of 40 Class I, 40 Class II, and 30 Class III patients were assessed for the measurement of sella length, width, height, and area. The maxillary length, mandibular ramus height, and body length were also measured. The sella dimensions were compared among three malocclusion types by one-way ANOVA. Pearson correlation was calculated between the jaw size and sella dimensions. Furthermore, the ratio of jaw base lengths and sella area were calculated.
  
  
  CONCLUSIONS
  Mean sella length, width and area were found to be greatest in Class III, followed by Class I and least in Class II though the results were not statistically significant. 3 out of 4 measured dimensions of sella, correlated significantly with mandibular ramus and body length each. However, only one dimension of sella showed significant correlation with maxilla. The mandibular ramus and body length show a nearly constant ratio to sella area (0.83-0.85, 0.64-0.65, respectively) in all the three malocclusions. Thus, mandible has a definite and better correlation to the size of sella turcica.
authors.affiliation: Department of Orthodontics and Dentofacial Orthopedics, Maulana Azad Institute of Dental Sciences, New Delhi, India.
authors.lastname: Neha
authors.affiliation: Department of Orthodontics and Dentofacial Orthopedics, Manipal College of Dental Sciences, Mangalore, Karnataka, India.
authors.forename: Subraya
authors.initials: S
authors.lastname: Mogra
authors.affiliation: Department of Orthodontics and Dentofacial Orthopedics, Manipal College of Dental Sciences, Mangalore, Karnataka, India.
authors.forename: Vorvady Surendra
authors.initials: VS
authors.lastname: Shetty
authors.affiliation: Department of Orthodontics and Dentofacial Orthopedics, Manipal College of Dental Sciences, Mangalore, Karnataka, India.
authors.forename: Siddarth
authors.initials: S
authors.lastname: Shetty
keywords: Size of sella turcica; sella size and malocclusion; sella size and mandible