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Soft tissue changes associated with total maxillary advancement: a preliminary study.

J J Dann, R J Fonseca, W H Bell

Journal of Oral Surgery (American Dental Association : 1965)

|January 1, 1976

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This study analyzed soft tissue changes in the upper lip following anterior maxillary advancement surgery. New ratios quantify upper lip movement, aiding in clinical treatment planning for orthognathic surgery.

Area of Science:

Orthodontics and Maxillofacial Surgery
Cephalometric Analysis
Soft Tissue Reconstruction

Background:

Anterior maxillary advancement is a common orthognathic procedure.
Understanding soft tissue response is crucial for predictable outcomes.
Limited quantitative data exists on upper lip behavior post-advancement.

Purpose of the Study:

To retrospectively investigate soft tissue changes in the upper lip after anterior maxillary advancement.
To develop and propose quantitative ratios for describing upper lip movement relative to hard tissue changes.
To assess the clinical utility of these ratios in treatment planning.

Main Methods:

Retrospective analysis of cephalometric radiographs from eight patients.
Measurement of soft tissue and hard tissue changes.

Related Experiment Videos

Statistical analysis using correlation coefficients and regression functions.

Calculation of ratios for soft tissue to hard tissue movement in the upper lip.

Main Results:

Established correlations between hard tissue movement and upper lip soft tissue response.
Proposed three specific ratios to quantify upper lip positional changes.
Demonstrated the potential clinical applicability of these ratios.

Conclusions:

The proposed ratios offer a quantitative method to predict upper lip behavior after maxillary advancement.
These ratios can enhance treatment planning in orthognathic surgery.
Further research is recommended to validate these findings in larger cohorts.