Correlation Between Soft and Hard Tissue Changes in the Zygomaticomaxillary Region After Bone Contouring Surgery for Fibrous Dysplasia-A Preliminary Study

Bimeng Jie; Baocheng Yao; Jingang An; Yi Zhang; Yang He

doi:10.1016/j.joms.2019.05.002

Correlation Between Soft and Hard Tissue Changes in the Zygomaticomaxillary Region After Bone Contouring Surgery for Fibrous Dysplasia-A Preliminary Study

J Oral Maxillofac Surg. 2019 Sep;77(9):1904.e1-1904.e11. doi: 10.1016/j.joms.2019.05.002. Epub 2019 May 9.

Authors

Bimeng Jie¹, Baocheng Yao¹, Jingang An², Yi Zhang³, Yang He⁴

Affiliations

¹ Resident, Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology; National Engineering Laboratory for Digital and Material Technology of Stomatology; Beijing Key Laboratory of Digital Stomatology; National Clinical Research Center for Oral Diseases, Beijing, China.
² Associate Professor, Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology; National Engineering Laboratory for Digital and Material Technology of Stomatology; Beijing Key Laboratory of Digital Stomatology; National Clinical Research Center for Oral Diseases, Beijing, China.
³ Professor and Department Head, Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology; National Engineering Laboratory for Digital and Material Technology of Stomatology; Beijing Key Laboratory of Digital Stomatology; National Clinical Research Center for Oral Diseases, Beijing, China.
⁴ Associate Professor, Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology; National Engineering Laboratory for Digital and Material Technology of Stomatology; Beijing Key Laboratory of Digital Stomatology; National Clinical Research Center for Oral Diseases, Beijing, China. Electronic address: fridaydust1983@163.com.

PMID: 31158347
DOI: 10.1016/j.joms.2019.05.002

Abstract

Purpose: The purpose of the present study was to determine the correlation between the soft and hard tissue changes in the zygomaticomaxillary region after facial bone contouring surgery for patients with craniofacial fibrous dysplasia (FD).

Materials and methods: The present study was a retrospective case series that reviewed the cases of 13 patients with craniofacial FD in the zygomaticomaxillary region who had undergone navigation-guided facial bone contouring surgery from January 2013 to October 2017. Pre- and postoperative computed tomography (>3 months) were collected. The pre- and postoperative soft and hard tissues were placed in the same spatial coordinate system using multipoint registration to measure the distances between the corresponding pre- and postoperative points of the soft and hard tissues. The outcome variable was the corresponding soft tissue change. The correlation between the hard and soft tissue changes was obtained using correlation analysis with SPSS software (IBM Corp, Armonk, NY). The linear regression equation of the soft and hard tissue changes was used to predict the corresponding soft tissue changes.

Results: The Pearson correlation coefficient of the zygomatic region was 0.954 (P < .001) and the coefficient for the maxillary region was 0.758 (P < .001). The linear regression index (R²) for the zygomatic and maxillary regions was 0.910 (P < .001) and 0.575 (P < .001), respectively. The β value of the linear regression equation for the zygomatic and maxillary regions was 0.815 (P < .001) and 0.52 (P < .001), respectively.

Conclusions: The soft and hard tissue changes were highly correlated in both the zygomatic area and the maxillary area, and the variance of the maxillary area was slightly greater than that in the zygomatic area. This implied that the change of 1 mm of bone tissue along the tangent direction of the bone contour will cause a change of 0.815 mm in the soft tissue in the zygomatic region and 0.52 mm in soft tissue in the maxillary region.

MeSH terms

Cephalometry
Fibrous Dysplasia of Bone* / surgery
Humans
Imaging, Three-Dimensional*
Maxilla*
Retrospective Studies
Tomography, X-Ray Computed
Zygoma / anatomy & histology
Zygoma / surgery