Implant-assisted removable partial denture for severely atrophied mandible / 대한치과보철학회지

Mandible with severe alveolar bone atrophy poses a significant challenge in terms of reproducing clinically acceptable anatomy for a removable prosthesis. To overcome this potential complication, altered cast impression technique is often recommended to capture accurate and functional gingiva tissues. It becomes possible to get proper anchors functional impression by placing 2 implants crowns which were impossible in previous implant overdenture impression technique. In this case, an 80-year old female patient with severe mandibular ridge atrophy was treated with an implant-assisted removable partial denture with two implant crowns on the canine area. An altered cast impression was taken with an individual tray on a metal framework of removable partial denture on both posterior edentulous areas. The patient was satisfied with the final prosthesis after failure of 2 previous prostheses. Clinician had a difficult time to manage disabled patient and patient were suffered with ill-fitting denture due to inaccurate impression in conventional overdenture condition. The oral rehabilitation was completed with placing 2 implants as proper anchor.

Clinical evaluation of the fine impression technique for removable partial dentures / 口腔疾病防治

Objective@# To provide a clinical reference by evaluating the restorative results of an accurate impression technique for distal-extension removable partial dentures.@*Methods@#Forty-two patients with free-end dentition defects who visited the Prosthodontic Department of Nanjing Stomatological Hospital, Medical School of Nanjing University, between April 2017 and January 2018 were selected. The final impression was made by an accurate impression technique to fabricate fifty-two removable partial dentures with casting frameworks. The restorative result was judged by clinical examination and patient feedback immediately after wearing dentures and at 1 week, 3 months and 6 months.@*Results@#All fifty-two dentures for forty-two patients were seated successfully, with good retention and stability. Complications occurred throughout the 6-month follow-up, including 4 cases of mucous pain, 4 cases of retention force attenuation and 1 case of abutment fracture. There were no periodontics problems. The dentures garnered high patient satisfaction.@*Conclusion@#The accurate impression technique for distal-extension removable partial dentures showed good clinical results in this follow-up investigation.

Clinical study of removable prosthesis fabricated for upper jaw defect by altered cast impression technique / 实用口腔医学杂志

Objective:To evaluate the subjective feeling and the objective chewing effect of the patients with the prosthesis made for upper jaw defect by altered cast impression technique.Methods:A self-control experiment was conducted for 30 patients with the pros-thesis made for upper jaw defect by specific tray impression technique and altered cast impression technique respectively.As soon as the impression was finished,the patients were required to finish 2 questionnaires,one was about their self-comfortable sensation and the other one was the STAI(State-Trait Anxiety Inventory)about their feeling of anxiety.Then the chewing-effect was tested.Data were analysed by SPSS 20.0 software (T-test and Rank-sum test).Results:Most prosthesis made by altered cast impression technique showed increased masticatory function(P <0.05).The subjective-felling evaluation indicated that the altered cast impression technique was more comfortable but there was no difference between the 2 methods in the whole course of the impression(P =0.051).STAI score showed that the patients suffered lower anxiety with altered cast impression.Conclusion:The altered cast impression technique can en-hance masticatory efficiency and increase the satisfaction of patients for preparation of the posthesis for upper jaw defect.

A Digital Approach to a Definitive Immediate Denture: A Clinical Report

Even though an immediate denture (ID) is a practical prosthesis, fabricating an ID may be challenging, as unexpected removals of periodontally compromised teeth may occur during an impression procedure. This clinical report introduces a digital approach to a maxillary ID. An intraoral scanner was applied to prevent accidental extraction. A physical cast and a resin pattern of a framework were fabricated with rapid prototyping technology. A proper border and retention was also achieved by an altered cast impression.