Prediction of Mandibular Growth Pattern Using Palatoscopy: A Retrospective Model Analysis.

AIM AND OBJECTIVE: To predict and correlate mandibular growth pattern using palatoscopy (average, horizontal, and vertical).

MATERIALS AND METHODS: This retrospective study includes 120 archived maxillary casts. One key person and two examiners performed the study; the key person was responsible for coding and collecting casts and radiographs, as well as calibration of the examiners. The key person divided the samples into three craniofacial growth pattern groups (average, horizontal, and vertical) based on Frankfort-mandibular plane angle (FMA), SN-GoGn, and facial axis angle and distributed them to the blinded examiners. Rugae were studied using a modified Thomas and Kotze classification system. After the analysis, the results were decoded and analyzed with the corresponding cephalometric radiographs.

RESULTS: Multinomial logistic regression was employed to predict the mandibular growth patterns with the following independent variables: Forwardly directed rugae, number of divergent rugae, predominant shape circular, predominant shape curved, primary rugae, predominant shape wavy, number of convergent rugae, and horizontally directed rugae.

CONCLUSION: Palatal rugae patterns predict the growth pattern of the mandible.

CLINICAL SIGNIFICANCE: Considering the significant parameters and their correlation with mandibular growth pattern, prediction of mandibular growth patterns can be done noninvasively.