Aim: To investigate the application of Bolton’s ratios in the proper diagnosis and treatment planning for Chinese orthodontic patients with congenitally missing mandibular incisor. Materials and Methods: Twenty-seven Chinese cases (males 10, females 17) with congenitally missing mandibular incisor and class I molar relationship were recruited in this study. Guided by the anterior Bolton’s ratios, three therapeutic strategies (each for 9 patients) were carried out according to different indications, which included enamel stripping, prosthetic restoration and extraction therapy. Results: After treatment, all the patients achieved good occlusion with normal Bolton’s ratios and the clinical results were satisfied. Conclusion: It suggested that the application of Bolton’s ratios in orthodontic treatment planning for Chinese patients with mandibular congenital missing incisor might be clinically beneficial for optimum treatment outcomes.
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Han et al. (2010) studied this question.
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