Evaluation of condyle-fossa relationships in skeletal Class I malocclusion with variable degrees of deep overbite and open bite

ABSTRACT

Objective

To compare the temporomandibular joint (TMJ) position and shape between skeletal Class I subjects with different degrees of deep overbite or open bite and unaffected peers.

Methods

Cone beam computed tomography (CBCT) images of 90 participants, equally divided into deep bite, open bite, and control groups (DBG, OBG, and CG, respectively), were analyzed. The DBG and OBG were further subdivided into three subgroups based on the severity. Linear and angular measurements were used to determine the positional and morphological characteristics of the TMJ.

Results

DBG showed significantly larger superior joint space, anterior inclination of the condyle, and articular eminence inclination than CG and OBG. The severity of deep bite and open bite significantly influenced the TMJ position and morphology.

Conclusion

In severe deep overbite and open bite cases, there were considerable alterations in TMJ components, most likely as a result of functional demands.

KEYWORDS:

• Temporomandibular joint
• deep overbite
• open bite
• condylar path

Acknowledgments

We would like to acknowledge JZ in the promotion of this study.

Disclosure statement

No potential conflict of interest was reported by the authors.

Author contributions

YC designed the work and drafted the manuscript. XZ and YL were responsible for collecting the data. YL and LL performed the statistical analysis. NL and HD contributed to the approval of the final version of the manuscript. JZ was a project administrator and reviewed and edited the manuscript. All authors read and approved the final version of this manuscript.

Supplementary material

Supplemental data for this article can be accessed online at https://doi.org/10.1080/08869634.2022.2126918

Additional information

Funding

This study was supported by the National Science Foundation for Young Scientists of China [Grant No. 31800818] and the Program for the Natural Science Foundation of Chongqing, China [cstc2020jcyj-msxmX0191].