Comparison of alveolar ridge preservation methods using three-dimensional micro-computed tomographic analysis and two-dimensional histometric evaluation

PURPOSE: This study evaluated the efficacy of alveolar ridge preservation methods with and without primary wound closure and the relationship between histometric and micro-computed tomographic (CT) data. MATERIALS AND METHODS: Porcine hydroxyapatite with polytetrafluoroethylene membrane was implanted into a canine extraction socket. The density of the total mineralized tissue, remaining hydroxyapatite, and new bone was analyzed by histometry and micro-CT. The statistical association between these methods was evaluated. RESULTS: Histometry and micro-CT showed that the group which underwent alveolar preservation without primary wound closure had significantly higher new bone density than the group with primary wound closure (P<0.05). However, there was no significant association between the data from histometry and micro-CT analysis. CONCLUSION: These results suggest that alveolar ridge preservation without primary wound closure enhanced new bone formation more effectively than that with primary wound closure. Further investigation is needed with respect to the comparison of histometry and micro-CT analysis.

The mediation effects of psychological factors in the relationship between mouth dryness and oral health related quality of life / 대한구강보건학회지

OBJECTIVES: The aim of this study was to investigate the role of psychological factors as mediators in the casual relationship between mouth dryness and oral health-related quality of life of adults and to explore gender differences in what psychological factors play an important role in mediating the path of mouth dryness to quality of life. METHODS: Self-administered questionnaires were distributed to 321 adults who are above 20 and under 65 years of age. Collected data were analyzed via statistical packages using a multi-group analysis through the SEM (Structural Equation Model). RESULTS: Based on the statistical analysis, stress was a major psychological factor in male subjects. While depression served as a main mediator in female subjects. We discovered that the path coefficients of the following paths showed significant gender differences: mouth dryness --> depression, depression --> quality of life, stress --> quality of life. CONCLUSIONS: A gender-specific approach regarding effective prevention of stress and depression may be important for understanding the relationship between mouth dryness and quality of life.