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Measuring Maxillary Posterior Tooth Movement: A Model Assessment using Palatal and Dental Superimposition
Published on: February 23, 2024
Associations of alveolar ridge morphology with denture base extension and patient-reported outcomes in complete
Yapeng Pei1, Zhicheng Yin2, Junyi Zhao1
1State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Department of Prosthodontics, West China College of Stomatology, Sichuan University, Chengdu, Sichuan, PR China.
Background:
This observational study digitally evaluated alveolar ridge morphology and analyzed jaw-specific associations among ridge dimensions, denture base surface area, and oral health-related quality of life in complete denture wearers.
Materials And Methods:
A total of 63 completely edentulous arches (30 maxillary, 33 mandibular) were included. Ridge height and width were measured at the locations corresponding to incisor, canine, premolar, and molar regions using digitally scanned casts. Denture base surface area was calculated from the final denture designs. Patient satisfaction was assessed using the Oral Health Impact Profile for Edentulous Patients (OHIP-EDENT) questionnaire. Spearman correlation analyses and linear mixed-effects models were used to evaluate associations between ridge dimensions and outcomes. Mixed-effects models included jaw, ridge parameter, jaw-by-ridge interaction, and arch length as fixed effects, with participant as a random intercept.
Results:
Compared with the mandible, the maxilla had greater ridge dimensions, a larger denture base surface area, and lower OHIP-EDENT scores (P< .05). In the maxilla, only incisor, canine, and premolar heights were correlated with the base area and OHIP-EDENT scores. In the maxilla, premolar height showed the strongest association among the measured ridge parameters. It was positively associated with denture base surface area (80.99, 95% CI [34.90, 127.07], P<.001), and negatively associated with OHIP-EDENT scores (-2.61, 95% CI [-4.53, -0.68], P=.013). In contrast, in the mandible, all measured ridge dimensions showed significant correlations with both outcomes. Mixed-effects models further indicated that molar height showed the strongest association, with a positive association with base area (167.89, 95% CI [93.54, 242.24], P<.001), and a negative association with OHIP-EDENT scores (-5.90, 95% CI [-8.38, -3.43], P<.001).
Conclusions:
Alveolar ridge morphology was associated with denture base surface area and patient-reported outcomes in conventional complete denture wearers. These associations were generally more consistent in the mandible than in the maxilla, with molar ridge height showing the most robust jaw-specific interaction after outcome-specific Holm adjustment.