[A prospective single-cohort study of implant-supported full-arch metal-ceramic prosthesis with gold-platinum alloy framework for treatment edentulous mandible in elderly patients: 15-year report]. / Implantatsionnoe protezirovanie protyazhennymi metallokeramicheskimi konstruktsiyami s karkasom iz zolotoplatinovogo splava u pozhilykh patsientov: rezul'taty 15-letnego perspektivnogo odnogruppovogo kogortnogo issledovaniya.

OBJECTIVE: To study the effectiveness of implant-supported full-arch metal-ceramic prosthesis with gold-platinum alloy framework in elderly patients. MATERIALS AND METHODS: The study included patients with complete and/or partial loss of teeth and terminal dentition. In 2007-2008, 354 implants were inserted in 27 patients. The age of the patients was 61.31±5.08 years. Mombelli index criteria (mBI [modified Sulcus Bleeding Index]) were used. The plaque index was determined using a modified Löe & Silness method. The state of the peri-implant bone (ΔMBL) was determined by a series of OPG. The Geriatric Oral Health Index (GOHAI) was used to assess oral health in the elderly. RESULTS: Metal-ceramic full-arch implant prostheses with a gold-platinum alloy framework, based on a sufficient and optimal number of implants (6-8), showed high survival rate (100%) after 15 years. Marginal bone loss (ΔMBL) after 15 years was -1.44±1.27 mm. The survival rate of implants was 99.4%. Scores on the GOHAI scale were higher in patients after orthopedic rehabilitation (from 52.7±7.1 to 54.1±8.4, p<0.001). CONCLUSION: After 15 years, all prostheses had mechanical defects, which at the same time allowed them to be used without restrictions. Screw fixation of full-arch implant prostheses, although it was associated with mechanical complications, nevertheless made it possible to perform surgical interventions in a timely manner and stop the development of inflammatory complications. Thus, we do not see any grounds for removing metal-ceramic prostheses and replacing them with new implant prostheses even after a 15-year period of operation. At the same time, it is necessary to take into account the reduction in the possibility of individual oral hygiene in elderly patients, as well as possible restrictions on self-visiting a dentist or dental hygienist.

[A prospective single-cohort study of an immediate prefabricated three-implant-supported full-arch prosthesis for treatment edentulous mandible in elderly patients: 3-year report.]

The use of implant prosthetics in the elderly and senile patients is highly relevant. Many clinicians advocate a wider introduction of immediate implant restorations in the elderly due to the fastest restoration of aesthetics and function. The purpose of the work is to study the efficacy of implant prosthetics in elderly patients with extended replacement structures with a small number of artificial supports. The patients underwent implant restoration of the mandible with an extended metal-polymer structure «Trefoil¼ with a prefabricated standard frame and three artificial supports. The overall implant survival rate was 96%. The cumulative survival rate of patients was 93%. The cumulative survival level of prostheses was 98,3%. The high implant and prosthesis survival rates, the good condition of the peri-implant mucosa and bone three years after restoration, as well as the high level of patient satisfaction and the significantly higher level of their quality of life, along with the high medical and economic efficiency of the method, allow us to consider it a promising standard of geriatric dentistry.

[Clinical analysis of the short-term and long-term results of the implant-supported Trefoil dental rehabilitation in Russia]. / Klinicheskii analiz blizhaishikh i otdalennykh rezul'tatov primeneniya implantatsionnogo protezirovaniya «Trefoil¼ v Rossii.

THE AIM OF THE STUDY: Was to presents the first clinical medium-term (18 months) results of implant-supported rehabilitation using this method in Russia, with the special attention paid to the assessment of the patient's quality of life on the GOHAI scale. MATERIALS AND METHODS: The authors performed a clinical and paraclinical examination of 29 patients (20 women and 9 men). The age of the patients ranged from 47 to 88 (average value - 65.45±9.7). We performed a retrospective analysis of all patients operated from June 2017 till March 2019. The patients filled in GOHAI questionnaires about their state of health and quality of life (before treatment and 6 weeks post-surgery). Patients with one or more anterior teeth present as well as fully edentulous mandibles were included in the study. The antagonist teeth could be presented as complete dentures, natural teeth, or implant-supported fixed restorations. All patients received three Trefoil implants (Nobel Biocare AB) inserted with a torque of at least 35 Ncm. The Trefoil bar (Nobel Biocare AB) was used as the framework of the Trefoil bioengineering structure. Statistical processing of the results was performed using the SPSS 23 software. The t-test for dependent samples was used to compare the results of GOHAI surveys before and after the operation and the following statistical hypotheses were suggested: H0 - the results of the GOHAI survey before the operation do not differ from the results of the GOHAI survey after the operation; H1 - GOHAI pre-op survey results are different from GOHAI post-op survey results. A comparison was made between the GOHAI results before and after surgery in male and female patients using the t-test for independent samples. RESULTS: 29 patients included in this (20 females and 9 males) with the mean age of 65 (range:47-88). The average time of operation (surgical operation, prosthetic stage including dental lab work) the Trefoil technique was 6.18 ± 0.87 hours. With the presence of teeth in the mandible, the operation took longer by an average of 45 minutes. Patients were followed for 15±6 months. No chipping of artificial teeth or fractures of the veneering was observed. The survival rate of restorations was 100%. The implant survival rate was 98.85%. The results of the GOHAI survey after surgery show a significant difference from the results of the pre-op survey. If we analyze the average values for the sample, it can be argued that the average result for the GOHAI survey before the operation (29.86) is significantly lower than the average one for the GOHAI survey after the operation (54.93). CONCLUSION: Preliminary medium-term results of the Trefoil concept for implant-supported rehabilitation of the mandible indicate high patient satisfaction results after 6-18 months of follow-up. It requires a further comprehensive study to obtain data with more patients and over a longer follow-up period.