View clinical trials related to Jaw, Edentulous, Partially.
Filter by:In dental implant restoration, available literature demonstrates the advantage of using tall abutments, with a change of diameter with respect to the implant and a conical internal connection in the abutment-implant gap. However, for multiple restorations, the abutment-prosthesis connection has not been studied in detail. The "multi-unit" systems, both standard and brand specific, have either a flat or butt joint or an cone. In any case, both are external connection systems. Recently, an internal-type abutment-prosthesis connection system has been developed. Although it is proving its usefulness in single restorations, its use in multiple restorations compared to traditional systems has not been studied. Therefore, taking into account all of the above, the present study has the overall objective of analyzing marginal bone loss (MBL) and adaptation of soft tissues by comparing a multiple prosthesis system of the "external, flat" type versus an external system of the "internal, conical" type.
Dental implants may suffer from bone loss around them, particularly at the upper portion where the prosthesis starts. The connection between both parts of the tooth restoration is key for avoiding micromovement during chewing, bacterial contamination and initiation of bone loss. Thus, investigating factors related to this bone loss in different types of implant-prosthetic connections is key for promoting better use of available therapeutics devices. In this study, we will study marginal bone levels over time as well as bacterial contamination and inflammatory markers in the peri-implant sulcus around implants with connical connection and compare them with those obtained when using implants with internal hexagonal connection. The hypothesis is that bone loss will be higher in implants with hexagonal connection associated with a pathological microbiome in the sulcus that induces a higher inflammatory response.
The aim of is to compare the survival rate and technical outcomes of cantilever implant-supported fixed denture prosthetics (cFDPs) made either out of monolithic zirconia bonded to a titanium base in a digital workflow, or porcelain fused-to metal using a gold abutment in a conventional workflow. In addition, biological outcomes, wear patterns, PROMs and time efficiency will be recorded. The null hypothesis is: the reconstruction type does not influence the survival rate and technical outcomes of 2-unit implant-supported cFDP.
The microthreaded and platform switched implants could control the stress in the suitable range. The splint would disturb the function. So it is necessary to know whether the splinted single-unit crowns is fit for the adjacent multi-implants. Outcome variables: Splinted single-unit crowns on one side implants and non-splinted single-unit crowns on the other side Materials and method: 80-100 consecutive implants in at least 20 patients would be included for implant- supported restorations in the posterior maxilla or mandibular. All patients would be in general good health. For every patient, the same posterior teeth had lost on both sides for more than 6 months. All patients were treated by the same qualified surgeon. Prosthetics procedure would be performed by an experienced prosthodontist. The two sides were allocated to the test or the control group according to the predefined computer-generated randomization table. Clinical evaluations and radiographic analysis were performed by an oral and maxillofacial radiologist who was not aware of the type of Prosthetics technique that was used.
The aim of this prospective cohort study is to compare the esthetic, clinical and patient-centered outcomes following immediate and delayed implant placement protocols.
The main purpose of the present study is to evaluate the dental implant placement using two different CBCT-derived templates and to study the related factors that affect accuracy so as to support the further clinical application of the technique. Thirty patients with partial edentulous denture are recruited. They are randomized to two groups. A radiographic guide is prepared before CT/CBCT scan. The CT/CBCT scan DICOM files are loaded in a planning program and converted into 3D computer images. A surgical template is fabricated through this virtual planning. After 6 weeks, if the implants are judged stable, the patient has the option of replacing the fixed prosthesis. Patients are recalled for oral hygiene maintenance and prosthetic controls every 6 months for the entire duration of the study.
To investigate the prevalence and risk factors for peri-implant disease in partially edentulous patients rehabilitated with implants supported crown or bridge so as to provide evidence for clinical prevention and control.
To investigate the patient-related risk factors for peri-implant disease in partially edentulous patients rehabilitated with implants supported crown or bridge so as to provide evidence for clinical prevention and control.
The purpose of this study is to examine the safety and usefulness of the Regenecure guided bone regeneration membrane for stimulating bone growth in patients that don't have enough bone for dental implant placement. The study will include 16 patients in each group, 20 non-smokers and 12 smokers, a total of 32 patients will participate in the study.
A potential complicating factor affecting implants is crestal bone loss. The causes of crestal bone loss are attributed to several factors. Among those hypothesized, proof for one or another cause remains obscure. Clinical documentation suggests that implant design may be a key factor. While the evidence is inconclusive, various authors suggest that it is a result of a combination of effects including (1) limited drilling procedure and restricted second-stage surgery 2, (2) rough implant surface in crestal bone 3, (3) microthread design for implant stiffness 4, (4) loading along a conus versus a flat interface 5, and (5) the absence of a significant microgap 6. The practice of platform switching (e.g. placing a 4 mm diameter abutment on a 5 mm implant seating surface physically moves the inflammatory cell infiltrate zone away from the crestal bone). The growing body of anecdotal platform switch evidence supports this biological width hypothesis. Here the biological width refers to the height of the dento-gingival attachment apparatus around a normal tooth and is defined as the distance necessary for a healthy existence of bone and soft tissue from the most apical extent of a dental restoration. To formally test this hypothesis the current study has been designed. The Prevail implant has been made with an integrated medialized seating surface that establishes a platform switching function. This implant moves the implant/abutment interface away from the crestal bone and may therefore reduce the amount of bone loss observed in the standard (non-medialized) Osseotite implant design. The objective of this study is to evaluate crestal bone levels adjacent to the implant reference point from the time of implant placement to a period of two years after loading.