Alveolar bone thickness and lower incisor position in skeletal Class I and Class II malocclusions assessed with cone-beam computed tomography.
10.4041/kjod.2013.43.3.134
- Author:
Asli BAYSAL
1
;
Faruk Izzet UCAR
;
Suleyman Kutalmis BUYUK
;
Torun OZER
;
Tancan UYSAL
Author Information
1. Department of Orthodontics, Faculty of Dentistry, Izmir Katip Celebi University, Izmir, Turkey. baysalasli@hotmail.com
- Publication Type:Original Article
- Keywords:
3 Dimensional diagnosis and treatment planning;
Class II
- MeSH:
Cone-Beam Computed Tomography;
Humans;
Incisor;
Jaw;
Malocclusion;
Malocclusion, Angle Class II;
Overbite
- From:The Korean Journal of Orthodontics
2013;43(3):134-140
- CountryRepublic of Korea
- Language:English
-
Abstract:
OBJECTIVE: To evaluate lower incisor position and bony support between patients with Class II average- and high-angle malocclusions and compare with the patients presenting Class I malocclusions. METHODS: CBCT records of 79 patients were divided into 2 groups according to sagittal jaw relationships: Class I and II. Each group was further divided into average- and high-angle subgroups. Six angular and 6 linear measurements were performed. Independent samples t-test, Kruskal-Wallis, and Dunn post-hoc tests were performed for statistical comparisons. RESULTS: Labial alveolar bone thickness was significantly higher in Class I group compared to Class II group (p = 0.003). Lingual alveolar bone angle (p = 0.004), lower incisor protrusion (p = 0.007) and proclination (p = 0.046) were greatest in Class II average-angle patients. Spongious bone was thinner (p = 0.016) and root apex was closer to the labial cortex in high-angle subgroups when compared to the Class II average-angle subgroup (p = 0.004). CONCLUSIONS: Mandibular anterior bony support and lower incisor position were different between average- and high-angle Class II patients. Clinicians should be aware that the range of lower incisor movement in high-angle Class II patients is limited compared to average- angle Class II patients.
