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NCT06713577
This investigation will be a prospective, longitudinal clinical trial to study the clinical performance of a new monolithic, 3D shaded zirconia material for computer assisted design and computer assisted machining for chairside restorations. The restorations will be evaluated for a period of up to five years. The study is called Clinical Study of a 3D Shaded Zirconia for chairside computer assisted design and computer assisted machining (CAD/CAM) chairside restorations intended to be part of the validation plan and post market follow-up of the following products: CEREC Cercon 4D, Calibra Universal +, and Prime and Bond Active.
NCT05599269
This retrospective study investigates the longevity of dentures with SR Phonares II teeth after a wearing period of more than 10 years. The primary objective is to assess the survival rate of dentures with SR Phonares II teeth after more than 10 years. The secondary objectives asses the quality of the dentures concerning aesthetic, functional and biological properties.
NCT05818436
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.
NCT03720236
This is a randomized triple-blind clinical trial to evaluate the behavior of peri-implant tissues (bone and soft tissues) in BLX implants loaded early or delayed and with different surgical milling protocols. To this end, 40 BLX implants with a diameter of 3.75x10 will be placed in areas of mature bone scarred after extraction. They will be divided into 2 study groups, and these in turn into two subgroups. Group A: complete milling, Group B: partial milling. Each group will be assigned with code 1: early load and code 2: deferred load. Clinical and radiological parameters will be evaluated.
NCT04045574
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.