View clinical trials related to Dental Prosthesis Failure.
Filter by:This clinical trial aims to compare the performance of CAD/CAM-milled and 3D-printed full-arch implant-supported provisional restorations in patients at the Advanced Implant Prosthetics Clinic of the Complutense University of Madrid, of both sexes, over 18 years of age, edentulous upper, lower or both, whose treatment plan is at least a fixed implant-supported rehabilitation of the complete arch. The main question it aims to answer is if there are differences in the mechanical behavior and optical properties of the materials used as provisional materials in full-arch restorations on implants fabricated by CAD/CAM technology through machining or 3D printing. Participants will: - Receive milled (control material: PMMA; Multilayer PMMA block, HUGE; Shandong Huge Dental Material Corporation) or printed (test material: 3D impression resin; VarseoSmile Temp, Bego Bremer Goldschägerei Wilh. Herbst GmbH & Co. KG, Bremen) and they will be in provisional phase for 3 months doing daily life. Researchers will compare PMMA (Multilayer PMMA block, HUGE; Shandong Huge Dental Material Corporation) and the printed-resin (3D impression resin; VarseoSmile Temp, Bego Bremer Goldschägerei Wilh. Herbst GmbH & Co. KG, Bremen) to see: - Mechanical behavior and the absence of complications, fracture of the structure, material jumping or wear, loosening, or detachment. - Optical properties, initial color, and degradation of the materials used
Sarcopenia and malnutrition are closely involved in frailty. To prevent them, it is essential to assess oral function. "Oral fragility" manifests with specific signs or symptoms, including occlusion loss due to tooth loss and chewing difficulty. To recover from it, restoring function by placing a dental prosthesis in the event of tooth loss is essential. In Chile, many patients referred to secondary care to perform new prosthetic treatment live in conditions of less oral functionality and enter waiting lists that can take years, impacting general functionality. Falls are a public health problem with a high economic cost, the second cause of death worldwide. One of the causes is sarcopenia, and it has been studied that the decrease in the number of teeth and the occlusal posterior support region may be risk factors for decreased gait speed, an objective measurement of fall risk. It has been studied that the decrease in the number of teeth causes a reduction in total muscle mass, walking speed and lower quality of life. General objective: To evaluate the impact on the general functionality of applying an immediate prosthetic functionalization protocol in patients with deficient removable prostheses, compared with conventional treatment, at the secondary level of the health system, in patients over 70 years of age. Methodology: randomized, double-blind clinical trial with two groups of 62 patients each: experimental and control. The intervention will consist of recovering prosthetic function in one session before conventional rehabilitation vs the control group receiving conventional rehabilitation. Measurements will include manual grip strength measurements made with a Jamar dynamometer, timed up-and-go test, before and after prosthetic treatments and quality of life related to oral health through Ohip 7sp. Descriptive statistics will be applied through the registration of frequency and contingency tables. To compare hand grip strength, Pearson's Correlation will be used; for risk of pre and post-fall, the t-test will be applied for two related samples; for quality of life before and after the intervention, Chi2 will be used; changes in grip strength, fall risk and quality of life, between the different groups according to the Eichner index, one-way ANOVA will be applied, for related samples.
In recent years, zirconia-based implant-supported bridge designs have begun to be used more and more as an alternative to metal ceramic bridges. Another new material that has been introduced in the clinic is the high translucent monolithic zirconia, which has only been investigated a few follow-up studies with short follow up duration. The aim being to evaluate the clinical outcome of implant-anchored posterior bridges, made from 1. high-translucent monolithic zirconia, 2. zirconia ceramic with porcelain and 3. metal ceramics. The hypothesis is that high-translucent monolithic zirconia has lower rate of complications since surface porcelain veneering is not required. A total of 60 research subjects will be included in the study. Patients in need of a permanent implant-supported bridge, located posterior of the canine in the upper or lower jaw will be asked for participation. Each subject will be treated according to standard treatment protocols with implants from Nobel Biocare, the Branemark implant system and then be randomly assigned to obtain one of the following three type of bridges. 20 research subjects will be included in each of the three study arms. The prosthetic treatment will be carried out according to standard clinic protocol. All research subjects will be evaluated after 1, 3, 5 years. X-rays and photos will be taken at the installation of the bridges and after 1 and 5 years of follow-up or more frequent, depending on individual indication of the patient and the associated standard clinical care protocol. Personal data, implant survival, marginal bone loss and biological and technical complications related to the implants will be recorded. Survival of the bridge, technical and biological complication related to the bridge will also be recorded
The One tooth - One time (1T1T) innovative approach is a straightforward and cost-effective protocol to replace a missing tooth in the posterior region (Lambert and Mainjot 2017) (see Appendix). The digital impression of single unit implants right after the implant placement and the direct manufacturing of a Polymer-Infiltrated Ceramic Network (PICN) screw-retained crown allows the delivery of a final tooth in occlusion within the same day. The absence of lab procedures reduces the number of appointments, providing immediate results and high patient satisfaction. The prosthesis material choice is crucial in this procedure. Indeed, PICN high resilience, i.e. damping effect, could reduce peri-implant strain compared to ceramic materials (Magne, Silva et al. 2013) (Maminskas, Puisys et al. 2016), moreover its elastic modulus is close to tooth tissues, while other CAD-CAM composites value is too low and ceramic materials are too high. The rapid milling and manufacturing process, without any firing procedure, and the ease of adjustments (particularly to adjust proximal and occlusal contact points), make also PICNs well-adapted to chair-side systems. The material low stiffness and hardness can improve patient comfort and promote adaptation of the restorations to occlusal relationships with time. The 1T1T approach was presented as a proof of concept in a first international publication using tissue level implants from Straumann, which describes the whole protocol (Lambert and Mainjot 2017). Currently, a case series including 10 teeth is on-course, showing a 100% survival rate of implants and restorations after a 2-yr follow-up. These results are very promising but further clinical research is needed to validate such a protocol on a larger number of patients, on other implant systems as well as to compare this approach to conventional protocols.
This study evaluates the success rate, as the biological and prosthesis complications, of posterior single-unit implants immediately loaded with a chair side Computer-Aided Design and Manufacturing (CAD-CAM) composite crown, after a follow-up period of 6 months,1,2,3,4 and 5 years. Complementary ex vivo analyses will be performed to evaluate the wear of restorations. The time and cost benefit of the presented digital workflow, as patient centered outcomes will also be evaluated.