Abstract: Objective　 To evaluate the effect of minimally invasive tooth extraction on dental-related quality of life in the elder patients. Methods 161 teeth in elder patients who were treated in our hospital from May 2013 to May 2015 were extracted by minimally invasive tooth extraction. The Chinese version of oral health impact profile-14（OHIP-14）was employed to evaluate the impact of quality of life in these patients before and 1 week after treatment. The higher the scale scores are, the worse the oral health life quality is. Results After the minimally invasive tooth extraction,OHIP-14 total scores were lower than those before with significant difference （P<0.05）. The scores on “functional limitation”, “physiological pain”, “psychological discomforts”, “physiological disorder” and “psychological disorder” after treatment were all significantly lower than those before treatment（P<0.05）.The negative impact on "physiological pain" significantly decreased after treatment（p<0.05）（from 50.8% to 9.5%）. Conclusion Minimally invasive tooth extraction for elder patients has full preparations and good effect, which is an ideal medical treatment and worth of being generalized.

Key words: the Chinese version of oral health impact profile-14（OHIP-14）, the elder patients, minimally invasive tooth extraction