Active clinical trials for "Tooth Loss"

Changes in the marginal bone level surrounding the implant are the frequently used parameters in assessing the short- and long-term success. Multiple biological and biomechanical factors have been reported to adversely affect marginal bone level. Recently, initial vertical mucosal tissue thickness has also been reported to have an impact on bone stability.The hypothesis of present study is that soft tissue thickness on implant placement has no positive impact of crestal bone remodeling.

To analyze in vivo occlusal accuracy and occlusal adjustment requirement, a cross-over clinical trial was designed. Two 3-unit tooth-supported posterior FDPs were planned to be made for each patient's single missing tooth gap, one with complete analog workflow (control group) and the other complete digital workflow (test group). The analog workflow aims for a porcelain fused to metal (PFM) FDP whereas the digital workflow aims for 3-unit monolithic Zr FDP. PFor half of the restorations, digital impression was planned to be taken first and to be followed by analog impression. As for the occlusal adjustment, in half of the study sites monolithic Zr FDPs were planned to be tried-in first, followed by metal-ceramic FDP and vice versa. One investigator (DK) was assigned to prepare the restoration sites and deliver the FDPs. All monolithic Zr and all metal-ceramic FDPs were designed and fabricated by the same experienced dental technician. One investigator (HL), that was not involved in the treatment intervention was assigned to make the 3D analysis of the volumetric occlusal adjustment amount.

Patients who have severe crowding that require four premolars extraction will be treated in this study. The efficacy of the clear aligners and vestibular fixed appliances will be assessed. The treatment result of these two different methods will be explored using the Peer Assessment Rating (PAR) in two different times (T0: Before treatment, T1: After treatment) and the American Board of Orthodontics Objective Grading System (ABO-OGS) after treatment (T1). There are two groups: First group (Experimental): the patients in this group will be treated using clear aligners. Second group (Control): the patients in this group will be treated using fixed appliances.

This study will be initiated to compare the accuracy of implant placement using the guided trephination drilling protocol and the guided conventional drilling protocol.

The purpose of this non-inferiority trial is to determine the clinical efficacy of acellular dermal matrix (ADM) in the augmentation of the gum around dental implants as compared to an autologous gum graft (sCTG) obtained from the palate (roof of the mouth) in human adults. AlloDerm is regulated by the US Food and Drug Administration (FDA) as human tissue for transplantation. AlloDerm is processed and marketed in accordance with the FDA's requirements for banked human tissue (21 CFR, Part 1270 and Part 1271) and Standards for Tissue Banking of the American Association of Tissue Banks (AATB). Twenty adult subjects will be recruited who are in need of dental implant placement with simultaneous gum grafting to increase the thickness of the facial mucosa. Half of the subjects will be randomized to the ADM group and half will be randomized to the sCTG group. The surgical intervention will be performed according to the protocol and subjects will return for follow-up 2, 4, 8, and 16 weeks post-surgery for follow-up measurements of healing, gum thickness, subject perception of pain, and esthetic photographs.

To compare the effectiveness of demineralized freeze-dried bone allograft + cross-linked collagen membrane with xenograft + non-cross-linked collagen membrane for posterior extraction socket ridge preservation.

The primary term goal of these research efforts has been to enhance the functional status, comfort and quality of life of edentulous patients by evaluating clinical procedures, denture designs and adjunctive therapies based upon a clear understanding of: (1) oral functional impairments caused by the loss of teeth and subsequent tissue changes; (2) neurophysiological mechanisms associated with oral functions; (3) metabolism of oral tissues; and (4) interactions between biological and psychological processes and denture characteristics. The primary purpose of the proposed clinical outcome study is to compare the relative efficacies of three different combinations of implant-supported maxillary and mandibular prostheses with traditional complete dentures for edentulous patients. Completion of this study will determine the relative cost-effectiveness of the implant-supported denture treatments for use in the general population of edentulous patients.

Healthy soft tissue around the implant are considered as a biological seal to prevent inflammatory periimplant diseases and ensure healthy, stable and long-term survival of a dental implant. Due to the fact that the measurement methods in the literature differ, it is necessary to establish objective measurement method and to determine the minimum amount of tissue thickness to maintain a stable level of bone around the implant.

Several recent systematic reviews have highlighted how the macrodesign of dental implants can influence stress distribution and biomechanical and biological behavior in implants immediately inserted in post-extraction sites. Finite element analyzes have confirmed the benefit of the inclination of the implant threads in reducing implant displacement in post-extraction sites, increasing primary stability, and decreasing stress in contact with the trabecular bone. Other comparative studies have shown that the design of the threads of the implant does not affect the distribution of stress in the surrounding bone. In view of the need to evaluate the influence of implant macrodesign in the case of implants inserted in post-extraction alveoli, this study will examine the clinical results of two different types of implants with different macrodesigns, with the aim of providing scientific evidence in this regard. The present study will investigate through a randomized controlled trial the effect of thread macrodesign of X-space implants on primary stability and osseointegration when inserted in post-extraction sites, as compared to cylindric 2P implants.

Interventional retrospective prospective randomized clinical trial (RCT) in parallel groups. The sample size is 384 patients with loss of teeth and vitamin D imbalance. All patients will undergo or underwent dental implantation after additional investigations which reveal vitamin D imbalance (<30 ng/ml or <75 nmol/l). The 1 group will include 192 patients who will be or were operated on with dental implants after stabilization of vitamin D level with a help of an endocrinologist. The 2 group will include 192 patients who will be or were operated on during the treatment of vitamin D imbalance prescribed by the endocrinologist. The possible difference between groups can be considered the change of dental implants survival time and bone resorption level depending on the level of vitamin D and treatment time by the endocrinologist.