Relationship of Anterior Alveolar Dimensions with Mandibular Divergence in Class I Malocclusion – A Cephalometric StudyCorrespondence Address :
Dr. Ratna Rachel Ponraj,
Senior Lecturer, Department of Orthodontics and Dentofacial Orthopedics, Meenakshi Ammal Dental College & Hospital
Alapakkam Main Road, Maduravoyl, Chennai - 600095, India.
E-mail : firstname.lastname@example.org
Introduction: One of the major limiting factors in retraction of proclined teeth is the width of the alveolus both in maxilla and mandible.
Aim: The objective of this study was to assess the maxillary and mandibular anterior alveolar dimensions and to correlate with mandibular divergence in Class I bi-dento-alveolar protrusion patients.
Materials and Methods: Pretreatment lateral cephalograms (n=88) were analysed using a composite analysis with cephalometric software. Both maxillary and mandibular anterior alveolar widths and heights were measured and correlated with mandibular divergence. One-way analysis (ANOVA) and Pearson correlation test were used to compare and establish the significance between groups.
Results: Segregation of the data based on variation in the bi-cortical widths and heights showed that lesser alveolar widths and greater alveolar heights were associated with the high angled subjects and greater alveolar widths and lesser heights were associated with low angled subjects.
Conclusion: Patients with hyperdivergent mandible exhibited thin anterior alveolar width and greater alveolar height whereas low angled subjects had wider alveolar width and lesser alveolar height. Orthodontic treatment plan for retraction of anterior teeth must be based on these differences caused by variations in mandibular divergence.
Cortical limits, Iatrogenic sequelae, Retraction
Ratna Rachel Ponraj, Vinoth Abraham Korath, Nagachandran, Devaki Vijayalakshmi, Ratna Parameswaran, Priya Raman, et al.. RELATIONSHIP OF ANTERIOR ALVEOLAR DIMENSIONS WITH MANDIBULAR DIVERGENCE IN CLASS I MALOCCLUSION – A CEPHALOMETRIC STUDY. Journal of Clinical and Diagnostic Research [serial online] 2016 May [cited: 2018 Oct 17 ]; 10:ZC29-ZC33. Available from
Date of Submission: Jan 20, 2016
Date of Peer Review: Feb 25, 2016
Date of Acceptance: Apr 03, 2016
Date of Publishing: May 01, 2016
Financial OR OTHER COMPETING INTERESTS: None.
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