Alveolar bone thickness and lower incisor position in skeletal Class I and Class II malocclusions assessed with cone-beam computed tomography / 대한치과교정학회지
The Korean Journal of Orthodontics
; : 134-140, 2013.
Article
in En
| WPRIM
| ID: wpr-150565
Responsible library:
WPRO
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.
Key words
Full text:
1
Index:
WPRIM
Main subject:
Cone-Beam Computed Tomography
/
Overbite
/
Incisor
/
Jaw
/
Malocclusion
/
Malocclusion, Angle Class II
Limits:
Humans
Language:
En
Journal:
The Korean Journal of Orthodontics
Year:
2013
Type:
Article