Clinical effect comparison on removable partial denture with RPI clasp and three-arm clasp in repairing distal-extension free end deletion
MI Tingting1,2 LIU Yumei3 LI Wen4 HOU Xipeng2 GUAN Yu2 JIE Huifei5▲
1.Department of Prosthodontics, Stomatological Hospital of Air Force Military Medical University, Beijing 710032, China;
2.The First Medical Center, Beijing Rytime Dental Hospital, Beijing 100107, China;
3.Department of Stomatology, PLA 307 Hospital, Beijing 100071, China;
4.Chaoyang Clinic, Beijing Arrail-dental Clinic, Beijing 100026, China;
5.Department of Prosthodontics, Stomatological Hospital, School of Stomatology of Peking University, National Clinical Research Center of Stomatology, National Engineering Laboratory of Stomatological Digital Medical Technology and Materials, Beijing Key Laboratory of Stomatological Digital Medicine, Beijing 100081, China
Abstract：Objective To compare the effect of removable partial denture with RPI clasp and three-arm clasp in repairing distal-extension free end deletion. Methods From May 2015 to May 2016, 82 patients (160 dentures) wearing distal-extension free end cast bracket removable partial denture in Beijing Rytime Stomatological Hospital were retrospectively analyzed. They were divided into RPI clasp group (41 cases, 81 dentures) and three-arm clasp group (41 cases, 79 dentures) according to the different retainers of clasp. RPI clasp group was repaired with RPI clasp retainer casting bracket removable partial denture, and three-arm clasp group was repaired with three-arm clasp retainer casting bracket removable partial denture. Self-made questionnaires were used to compare the oral examination and subjective evaluation of the two groups. Results The effect of abutment loosening, clasp retention and overall restoration after removable partial dentures in the RPI clasp group were better than those in the three-arm clasp group with statistical significances (P < 0.05), but there was no significant difference in abutment occlusion between the two groups (P > 0.05). Subjective evaluation in the RPI clasp group was better than that in the three-arm clasp group, and the difference was statistically significant (P < 0.01). Conclusion RPI clasp repair with distal-extension free end deletion can improve the loose state of the abutment teeth and the overall recovery is good, which is worthy of clinical application. At the same time, oral hygiene should be strengthened, the overall design of prostheses should be strengthened, and regular reviews should be conducted.
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2019, Vol. 16 
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