Objective:To evaluate the character of cardiac valvular calcification in uremia patients and its effect on cardiac structure and function.Methods:Thirty five cases with mitral and aortic valve calcification were selected from 326 uremia patients.Control group consisted of 33 uremia patients without valvular calcification.Their age,LVEDD,LAD,AOD,LVWT,LVEF and blood pressure matched with calcification group.The observing indexs included distribution of calcification,degree of regurgitation,LVEDD,LAD,AOD,LVWT and LVEF.The observing duration was one year.Results:The results showed that characters of valvular calcification with uremia were similar to elder valvular calcification.The degree of regurgitation was more greater in calcification group than in control group after one year.The LAD was greater in calcification group after one year.Conclusion:Cardiac valvular calcification of uremia may cause the increase of regurgitation and enlarge LAD. [

BACKGROUND:Computer-assisted implant surgery can improve implantation accuracy,but the use of implant template in the posterior tooth area is limited for patients with small opening and small interocclusal distance.Therefore,the digital guide has been improved. OBJECTIVE:To study the effect of modified implant template on the accuracy of assisted implantation in missing second molars. METHODS:From July 2020 to July 2023,40 patients who received digital guide plate implantation or free hand implantation to repair missing second molars were selected from First Affiliated Hospital of Guangzhou Medical University.According to the coin toss method,patients were randomly divided into a trial group(n=22;modified digital guide assisted implantation)and a control group(n=18;free hand implantation).The data of neck deviation,tip deviation,depth deviation,and angle deviation were compared between groups for preoperative and postoperative cone beam CT overlap analysis.One week after the operation,the patients'satisfaction with the operation was assessed by visual analog scale score. RESULTS AND CONCLUSION:(1)The trial group included 25 implants(12 in the upper jaw and 13 in the lower jaw);the control group included 23 implants(8 in the upper jaw and 15 in the lower jaw).The neck deviation,tip deviation,depth deviation,and angle deviation of the trial group were all smaller than those of the control group(P<0.05,P<0.001).There was no significant difference in accuracy between the maxillary and mandibular implant site in the trial group(P>0.05).(2)There was no significant difference in satisfaction with the operation between the two groups(P>0.05).(3)The results showed that improving the digital guide plate for assisted implantation for missing second molar can improve surgical accuracy and is suitable for patients with small opening and small interocclusal distance in the posterior tooth area.