JOURNAL OF SHANDONG UNIVERSITY (HEALTH SCIENCES) ›› 2015, Vol. 53 ›› Issue (8): 66-70.doi: 10.6040/j.issn.1671-7554.0.2015.041

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Alveolar bone volume around upper incisors in adult patients with Class Ⅰ bimaxillary protrusion

LIU Lu, LI Rongrong, LIU Mengjun, ZHANG Yan, LIU Dongxu   

  1. Department of Orthodontics, Stomatology Hospital of Shandong University, Jinan 250012, Shandong, China
  • Received:2015-01-12 Published:2015-08-10

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Abstract: Objective To investigate the alveolar bone volume around upper incisors in adult patients with Class Ⅰ bimaxillary protrusion and provide a reference for orthodontic diagnosis and treatment planning. Methods Twenty-two cases with Class Ⅰ bimaxillary protrusion (bimaxillary protrusion group) and Eighteen cases with individual normal occlusion (control group) were recruited. Lateral cephalograms and cone beam computed tomography(CBCT) scannings were taken respectively and the alveolar bone volume around four upper incisors in each subject were measured by Mimics 16.0. Results In bimaxillary protrusion group, alveolar bone volume around upper incisors decreased compared to the control group (P <0.05), apart from labial root apex zone of central incisors, labial root apex and palatal crest zone of the lateral incisors. Besides, alveolar crest zone, middle root zone, palatal alveolar bone, total alveolar bone of the central incisors, labial alveolar bone, palatal alveolar bone, total alveolar bone of the lateral incisors and total alveolar bone volume of four upper incisors in bimaxillary protrusion group were decreased compared to the control group (P <0.001). Conclusion The alveolar bone volume around upper incisors in adult patients with Class Ⅰ bimaxillary protrusion is fewer than that in the subjects with normal occlusion. It should be more cautious in the process of treatment planning, especially retraction or intrusion of the upper incisors.

Key words: Alveolar bone volume, Bimaxillary protrusion, Cone beam computed tomography, Upper incisor

CLC Number: 

  • R783.5
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