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Correlation Between the Tragus-Incisal Distance and Interocclusal Rest Distance
The International Journal of Prosthodontics
|January 16, 2023
Summary
This study found a link between jaw size and the interocclusal rest distance (IORD), with significant differences observed between males and females regarding IORD and jaw size.
Area of Science:
- Dental anatomy
- Anthropometry
- Biometrics
Background:
- The interocclusal rest distance (IORD) is a key measurement in dentistry.
- Understanding factors influencing IORD, such as arch size and sex, is crucial for clinical applications.
Purpose of the Study:
- To investigate the correlation between mandibular arch size and IORD.
- To determine the influence of sex on IORD and arch size.
- To estimate the proportional variance explained by these factors.
Main Methods:
- 106 fully dentate adults (38 men, 68 women, aged 22-30) were analyzed.
- Interocclusal rest distance and tragus-incisal distance were measured.
- Pearson correlation and t-tests were used to assess relationships and differences.
Main Results:
- A significant positive correlation was found between IORD and mandibular arch size (tragus-incisal distance).
- Males exhibited significantly larger IORD, arch size, and rest angle values than females.
- Mean IORD was 2.76 mm overall, 2.13 mm for women, and 3.87 mm for men.
Conclusions:
- A significant correlation exists between interocclusal rest distance and mandibular arch size.
- Sex is a significant determinant of both interocclusal rest distance and arch size.
