Four-dimensional computed tomography evaluation of jaw movement following mandibular reconstruction: A pilot study

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• 作者：Masaya Akashi^a ; ^{akashim@med.kobe-u.ac.jp" class="auth_mail" title="E-mail the corresponding author} ; Yasuyuki Shibuya^b ; ^{shibuya@med.nagoya-cu.ac.jp" class="auth_mail" title="E-mail the corresponding author} ; Satoru Takahashi^c ; ^{staka@med.kobe-u.ac.jp" class="auth_mail" title="E-mail the corresponding author} ; Kazunobu Hashikawa^d ; ^{kazunobu@med.kobe-u.ac.jp" class="auth_mail" title="E-mail the corresponding author} ; Takumi Hasegawa^a ; ^{hasetaku@med.kobe-u.ac.jpm" class="auth_mail" title="E-mail the corresponding author} ; Yasumasa Kakei^a ; ^{ykakei@med.kobe-u.ac.jp" class="auth_mail" title="E-mail the corresponding author} ; Noriyuki Negi^c ; ^{noriyuki@med.kobe-u.ac.jp" class="auth_mail" title="E-mail the corresponding author} ; Toshinori Sekitani^c ; ^{atieinks-toshi@nifty.com" class="auth_mail" title="E-mail the corresponding author} ; Takahide Komori^a ; ^{komori@med.kobe-u.ac.jp" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Four-dimensional computed tomography ; Mastication ; Segmental mandibulectomy ; Free fibula osteocutaneous flap
• 刊名：Journal of Cranio-Maxillofacial Surgery
• 出版年：2016
• 出版时间：May 2016
• 年：2016
• 卷：44
• 期：5
• 页码：637-641
• 全文大小：472 K

文摘

The purpose of this study was to analyze jaw movement during mastication in patients who underwent mandibular reconstruction following segmental mandibulectomy, including mouth opening and mastication time, based on four-dimensional computed tomography (4D CT) images.

Material and methods

This study included six surgical patients, who underwent segmental mandibulectomy and simultaneous reconstruction with a free fibula osteocutaneous flap, and four controls. 4D CT was performed during mastication of a cookie to evaluate the movement of the jaw during natural function. The maximum mouth opening, mastication time, and movement of the mandibular angle during mastication were evaluated from the 4D CT images.

Results

4D CT images enabled visualization of jaw movement during mastication. When compared with the controls, the maximum mouth opening during mastication and excursion of the mandibular angle, especially on the diseased side, tended to decrease in surgical patients; however, this did not occur with mastication time. The numerical differences between the diseased and nondiseased side in surgical patients tended to be higher than the crosswise differences in controls.

Conclusion

4D CT images revealed differences in jaw function between patients who underwent mandibular reconstruction and controls. 4D CT could be used to evaluate postoperative outcomes following mandibular reconstruction.