Evaluation of maxillary sinus expansion in children due to maxillary first molar extraction

Abstract

Purpose

This study is aimed at understanding the effects of maxillary first molar extraction

on the expansion of maxillary sinus in children.

Subjects and methods

119 patients (aged 11-17 years) who had only one extracted maxillary first molar

were included in the study. The superoinferior differences of the sinus floor position

were measured in both dentate and edentulous sites on panoramic radiographs.

The expansion of the maxillary sinus after maxillary first molar extraction was

investigated in relation to fixed anatomic structures. The interorbital line (IL) and

two zygomatic process lines (IZ) were used as a reference. The vertical distances

between the IL and the inferior border of the maxillary sinus (IS) in edentulous (ISX)

and in dentate sites (IST) were measured. The data was analyzed statistically.

Results

The amount of maxillary sinus expansion in ISX was statistically significant in

comparison to IST (p<0.001). The most prominent sinus expansions were found

in subjects with extractions over six months prior to analysis (p<0.001). A negative

correlation was detected between the amount of maxillary sinus expansion and

IST (r = -0.438, p<0.001). There was a positive correlation between the amount of

maxillary sinus expansion and IZT (r = 23.8, p< 0.009).

Conclusion

This study showed that the extraction of one maxillary first molar resulted in a

negligible amount of sinus expansion in children. The results could be attributed to

there being only one tooth extraction and a transferring of functional forces to the

area of the neighboring teeth.

Keywords

• Maxillary sinus,sinus expansion,tooth extraction,panoramic radiography,children

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