Does the natural maxillary dentition influence the survival rate of mandibular metal-resin implant-supported fixed complete dentures? A systematic review and meta-analysis

Evaluation of mandibular implant-supported fixed prosthesis retained by 3 dental implants, 1 straight and 2 angled: A retrospective clinical study

STATEMENT OF PROBLEM

The minimum number of implants to support fixed complete dentures is still unclear.

PURPOSE

The purpose of this retrospective clinical study was to evaluate the survival rate of fixed complete dentures supported by 3 immediately loaded implants opposing maxillary complete dentures.

MATERIAL AND METHODS

A retrospective study of edentulous patients rehabilitated with complete dentures opposing mandibular metal-resin implant-supported fixed complete dentures supported by 3 immediately loaded implants was conducted in a 48-hour protocol. Fifty-one machined and 99 rough-surface implants were evaluated from 2.2 up to 8 years. Implant loss, peri-implant outcomes, and mechanical complications were assessed by considering the influence of age, sex, health status, smoking, excessive alcohol consumption, educational level, and socioeconomic status. The presence of comorbidities in relation to the implant surface or the cantilever lengths was also evaluated.

RESULTS

Four machined and 6 rough-surface implants failed, a 6.7% failure rate. The cantilever length varied from 3.3 to 22.9 mm. Mechanical complications were abutment screw loosening (3.0%), prosthetic screw loosening (17%), screw fracture (1%), superstructure detachment and fractures (16%), metal framework fracture (2%), maxillary denture fractures (6%), and mandibular prosthesis loss (4%). Peri-implant mucositis was found in 27% of participants. The cumulative implant and mandibular prosthesis survival rates were 93.3% and 96%, respectively. None of the variables evaluated, including demographic data and health status, were found to influence clinical failures and/or mechanical complications.

CONCLUSIONS

Mandibular fixed complete dentures supported by 3 implants can be considered a successful treatment with reduced costs compared with those of other fixed options for application in public health.

Effect of Orthodontic Combined with Implant Repair on Aesthetic Effect and Gingival Crevicular Fluid Factor in Patients with Dentition Defect and Periodontitis

In order to solve the effect of orthodontics combined with implant repair on the aesthetic effect and gingival crevicular fluid factor of patients with dentition defect and periodontitis, 60 patients who met the diagnostic criteria of chronic periodontitis were proposed. They were randomly divided into treatment group (taking Bushen Huoxue Guchi recipe for 3 courses while basic periodontal treatment) and control group (only basic periodontal treatment without taking any drugs). The experimental method of 30 cases in each group showed that PD, Al, and GI in the treatment group and control group decreased to varying degrees compared with those before treatment. The treatment group decreased significantly compared with the control group (P < 0.01). Chronic periodontitis is a common clinical periodontal disease, accounting for up to 95%, local stimulation, a variety of anaerobic bacteria infection, and periodontal plaque, and other factors may cause the occurrence of diseases. Routine treatment mainly includes upper gingival cleaning, lower curettage treatment, and equal root surface treatment. Although the clinical symptoms can be alleviated to a certain extent, the cause cannot be fundamentally excluded, leading to the disease progression in some patients and the formation of aggressive periodontitis and necrotizing periodontal disease.

Annual review of selected scientific literature: A report of the Committee on Scientific Investigation of the American Academy of Restorative Dentistry

The Scientific Investigation Committee of the American Academy of Restorative Dentistry offers this review of the 2020 professional literature in restorative dentistry to inform busy dentists regarding noteworthy scientific and clinical progress over the past year. Each member of the committee brings discipline-specific expertise to this work to cover this broad topic. Specific subject areas addressed include prosthodontics; periodontics, alveolar bone, and peri-implant tissues; implant dentistry; dental materials and therapeutics; occlusion and temporomandibular disorders (TMDs); sleep-related breathing disorders; oral medicine and oral and maxillofacial surgery; and dental caries and cariology. The authors focused their efforts on reporting information likely to influence day-to-day dental treatment decisions with a keen eye on future trends in the profession. With the tremendous volume of dentistry and related literature being published today, this review cannot possibly be comprehensive. The purpose is to update interested readers and provide important resource material for those interested in pursuing greater detail. It remains our intent to assist colleagues in navigating the extensive volume of important information being published annually. It is our hope that readers find this work useful in successfully managing the dental patients they encounter.