The Relationship between Subjective Evaluation and Objective Evaluation on the Examination for the Residual Ridge Height of Edentulous Patients

在全口义齿治疗中，适当地检查残留牙槽的高度是至关重要的。为阐明建立提高主观评价重复性的标准的可能性，对几位牙医的传统主观评价与模型测量客观评价的关系进行了评价。方法：在100套无牙颌研究模型中，评价的位置是左右第一磨牙中央窝对应的部位。部分牙科医生用三等量表进行主观评价，用数字游标卡尺进行客观评价。分别对临床从业年限<3年和从业年限>7年的牙医进行客观评价和主观评价的关系研究。在主观评价率的转换点确定客观评价的判别值。结果：主观评价因个体和临床年限的不同而有显著差异。根据7年以上的临床经验进行主观评价，得到辨别值：上颌为6 mm，中高为10 mm，下颌为0min，中高为5 mm，下颌为0min。无论个体的S临床经验如何，基于这些判别值的主观评价与客观评价的符合度都极低。结论：主观评价剩余牙槽脊高度的可重复性较低，为提高检查的普适性和可重复性，必须以判别值为参考进行主观评价。

Appropriate examination of the height of the residual ridge is critical in complete denture treatment. To clarify the possibility of establishing standards for improvement of the reproducibility of subjective evaluation, the relationship between conventional subjective evaluation by several dentists and objective evaluation by model measurement was evaluated.Methods : Locations for evaluation were the sites corresponding to the central fossa of the right and left first molars in study models (100 sets) of edentulous maxillas and mandibles. Subjective evaluation with three-grade scale was performed by some dentists and objective evaluation was performed with digital vernier calipers. The relationship between objective evaluation and subjective evaluation was studied separately in dentists with less than 3 years of clinical experience and those with more than 7 years. Discrimination values for objective evaluation were determined at changeover points of the rate of subjective evaluation. In addition, we studied agreement between subjective evaluation and objective evaluation with the discrimination values.Results : Marked variation was noted in subjective evaluation depending on the individual and number of years of clinical experience. Discrimination values were obtained from subjective evaluation by more than 7 years of clinical experience : for the maxilla, "low" and "middle" were 6 mm and "middle" and " high" were 10 mm ; for the mandible, "low" and "middle" were 0 min and "middle" and "high" were 5 mm. Agreement between subjective evaluation and objective evaluation based on these discrimination values was extremely low regardless of the individual' s clinical experience.Conclusion : Reproducibility of subjective evaluation of the residual ridge height was low To improve the universality and reproducibility of the examination, subjective evaluation must be performed with the discrimination values as references.