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    Determination of The Change of Maxillary Sinus Size in Orthodontic Treatment of Different Malocclusions
    (Selçuk Üniversitesi, 2022) Ertugrul, Betul Yuzbasioglu
    Background: Craniofacial growth-development has a complex and multifactorial structure. According to functional matrix theory, soft tissues change the development direction of hard tissues and affect the sinus cavities within the cranial structure. The objective of this study is to determine the change in the maxillary sinus dimensions after orthodontic treatments according to malocclusion groups. Methods: Our study comprises 51 individuals who have met the admission criteria. Our study was carried out retrospectively. The individuals included in the study have been analyzed in terms of malocclusion groups by comparing their maxillary sinus dimensions on panoramic films. Results: The intended base length, planar length of the maxillary sinus, and the area measurements of the maxillary sinus have been found to be different at pre-treatment and post-treatment in terms of malocclusion. In Class I, the post-treatment maxillary sinus indentation base length has decreased, and the average planar base length and the maxillary sinus area has increased, and in Class II, the post-treatment maxillary sinus indentation base length and the average planar base length has increased, the maxillary sinus area has decreased, and in Class III, The post-treatment maxillary sinus indentation base length and the average planar base length has decreased, and the maxillary sinus area has increased compared to the pre-treatment. Conclusion: There have been changes in the sinus dimensions of Class I, II, and Class III patients who have received orthodontic treatment compared to the pre-treatment. The changes in the possible craniofacial structures before orthodontic treatments should be taken into consideration carefully, and the dental treatments to be applied should be decided after such considerations.