View clinical trials related to Missing Teeth.
Filter by:Study the effect of neurectomy of nasopalatine nerve on the sensation of anterior palate in patients undergoing rehabilitation of anterior maxillary ridge with dental implant
Comparison of different drilling speed to classify bone quality by tactile sensation on a saw bone model
This study follows subjects who have agreed with their dentist that their failing teeth or missing teeth all need replacing. This study follows their standard routine care with some additional assessments. The dental treatment option that replaces a whole arch or both arches (upper and lower jaws) of the mouth is call "Teeth in a Day" and information on the use of the JUVORA™ Dental Disc during this treatment is what is being collected as part of this study along with subjects follow-up care.
To evaluate the change in patient Oral Health-related Quality of Life (OHRQoL) from wearing a cobalt chrome (CoCr) removable partial denture (RPD) to wearing the Solvay Dental 360TM polymer Removable Partial Denture (RPD) for 8 weeks.
The purpose of this investigator-initiated study is to compare new bone formation through histomorphometric analysis following maxillary sinus augmentation using two different bone graft materials. A total of twenty, sinus augmentation via a lateral approach will be performed for subjects requiring sinus augmentation for implant placement and randomly divided into 2 groups. These subjects will receive one of two different bone graft materials: 1) Anorganic bovine bone matrix- InterOss (Group A), 2) Anorganic bovine bone matrix- Bio-oss (Group B). At the time of implant placement (eight months after the sinus augmentation procedure), two bone biopsies will be collected from augmented site for the histomorphometric analysis. The percentage of vital bone will be measured and analyzed statistically, also the following will be measured: percentage of non-vital bone, percentage of non-bone material , and the percentage of connective tissue.
Tooth replacement is a significant issue in the World. Such replacement is considered important by patients to improve aesthetics, function and quality of life. Tooth replacement is therefore a significant issue. Resin-bonded bridges (RBBs) are conservative and cost-effective tooth replacement option that involves minimal tooth preparation and are secured in place with an adhesive cement by bonding to the outer enamel layer of the tooth. Clinical reports of these prostheses at the University of Hong Kong shows some of the highest success rate and greatest longevity in the dental literature. However, a problem with this type of prosthesis in that it still needs some tooth preparation to accommodate the framework thickness of the bridge. In some patients with tooth wear, this may mean cutting through the enamel crown down into dentine which will weaken the tooth. In light of the tooth preparation some patients will refuse this treatment, in particular patients with dental drill phobias. The aim of this study is to investigate RBBs with tooth preparation and with no tooth preparation for the replacement of single missing teeth in a randomized controlled trial. However, a significant consequence of a no preparation RBB will mean that after cementation the prosthesis will interfere with the patient's bite, making the bridge prosthesis stand high. This will take time for the patient's original occlusion to re-establish itself by the movement of the tooth supporting the bridge. Despite the success of "supra-occluding" restoration has been reported in some studies, currently neither no preparation nor supraoccluding dental bridges are the standard of care for general dental practitioners and have not been reported on as a clinical trial in the literature. Most symptoms reported for supraoccluding restorations were transient and are reversible. The findings of this research will have significant impact on the teaching and practice for clinical prosthodontics and patient care worldwide. Patients will have a dental prosthesis that requires no dental drilling, no local anaesthetic and will have a stronger tooth supporting the bridge that should have greater longevity. More patients, in particular phobic patients will therefore seek treatment for tooth replacement with this conservative treatment option.
Trial Design - Objectives and Purpose The aim of this study is to perform a proof of concept for the successful retention and outcome measures of zirconia RBBs for the replacement of missing canine or posterior teeth (6-8mm span) and that they will exhibit similar survival rates (95%) as metal ceramic RBBs over 3 years and short term (Botelho 2006). The use of monolithic extra-coronal zirconia RBBs in the posterior region does not appear to have been reported in the literature (A search pf Pub Med and Google Scholar has not shown any similar studies that have been published - pubmed.gov; Keywords: "zirconia", "resin", "clinical" assessed on 17/10/2015 AND google scholar; Keywords: "zirconia", "resin bonded fixed partial denture", "resin bonded fixed dental prosthesis", "Maryland", "resin bonded bridge" "posterior", "clinical") In addition, currently there appear to be no clinical trials planned or finished in this area (clinicaltrial.gov; Keywords: "zirconia", "resin" assessed on 17/10/2015) using zirconia RBBs in the posterior region. This reveals that there is a gap in the literature on the use of zirconia for replacing posterior teeth with such prostheses. The primary outcome measures would be: success ie. prosthesis retention ie. does not fall out The secondary outcome measures would be: - complications of the prosthesis such as tipping, drifting or fracture. - patient centered outcomes (satisfaction and oral health related quality of life) on the RBBs The hypothesis is that 2-unit cantilevered zirconia RBBs will be as successful as current data on 2-unit cantilevered metal-ceramic RBBs from this centre and that there will be no difference in the patient centered outcomes. The Primary review appointments will be at 1, 6, 12, 24 and 36 months. However, longer term follow up will be performed and this centre has experience of such long term studies (9.5 years - Botelho 2014). A randomized clinical trial (RCT) comparing to metal-ceramic RBBs will NOT be performed as the 5-year success rate of both metal-ceramic (Botelho 2006) and anterior zirconia (Sasse 2014) prosthesis were higher than 95% and this small differences would mean an unattainable large sample size in an equivalence test (Burns 2001). Significance and implications Zirconia has significant strength and greater stiffness than base metal alloys and displays clinical outcomes comparable to metal-ceramic conventional crowns and bridges (Heintze 2010, Sailer 2007). Well polished zirconia has been observed to have lower wear rates than porcelain (Stober 2014) Zirconia RBBs for posterior tooth replacement will offer an esthetic and biocompatible treatment option to patients over the traditional ceramic-metal RBBs. It is anticipated that patient demand for this would be high as these prostheses should be as successful (retentive). These results would re-write established dental prosthodontics textbooks and this would be the first centre to report on the routine use of a 2-unit extracoronal all-zirconia RBB for the replacement of missing posterior teeth. Research plan and methodology The sample pool would be obtained from patients presenting at the Prince Philip Dental Hospital, University of Hong Kong and who request and need replacement of one or more missing teeth.. They will be clinically assessed for eligibility and invited to participate with written consent in the study. After treatment they will be reviewed up to a 3rd year endpoint of the study. Further review beyond this will be undertaken.
The primary objective of this study is to determine if the use of a bone compaction process (osseodensification) (Densah™ bur: Versah Osseodensification Company™) to prepare dental implant sites, in human subjects, results in increased bone-ridge width, increased compact bone in the outer wall of the prepared sites, and dental implant stability.
Tooth replacement is a significant issue in the World and while dental implants and conventional bridges have been used to replace missing teeth, dental implants are too expensive for many and conventional dental bridges are destructive to supporting tooth tissue. Resin-bonded bridges (RBBs) are a conservative and cost effective replacement option that involves minimal tooth preparation, leaving the majority of the tooth intact. They are secured in place with an adhesive cement, which is bonded to the outer enamel layer. Clinical audit of these prostheses at the University of Hong Kong shows two-unit RBBs to have some of the highest success rates in the dental literature for the replacement of missing premolar and incisor teeth. However, for the replacement of molar teeth, two-unit RBBs are not performed, as established protocol and recognised texts contraindicate their use due to concerns with tipping or drifting of supporting teeth. Replacement of a single missing molar tooth can be with a three-unit, fixed-fixed (single-piece casting) or three-unit, fixed-movable (two-part casting). However, the fixed-fixed option has a higher debond failure rate than two-unit RBBs and therefore, at this centre, a modified, 3-unit fixed-movable design is used. This two-part casting allows for minor, independent movements of the supporting teeth and thereby aims to reduce stresses between them and, similarly, reduce de-bonding forces. This has the potential for greater longevity and easier long-term maintenance as if the major part of the bridge debonds it can be recemented. The aim of this unique study is to compare 2-unit and 3-unit RBBs for the replacement of single missing molar tooth in a randomized clinical trial. These two designs will be clinically evaluated at 6 months , 1 year, 2 years and 3 years to observe the outcome measures. The primary outcome will examine the success of the dental prostheses with respects to the need of any clinical intervention to repair or remediate the RBB or supporting tooth. Minor outcome measures will examine fatigue or damage to the prosthesis, changes in bone support, pulpal or periodontal health or tooth mobility. Patient satisfaction and quality of life evaluation of the dental prostheses will also be examined. Will 2-unit RBBs offer patients a simpler, cheaper, and successful option over current designs? This has not been previously reported.
The present study tested the hypothesis that Platform Switching (PS) and Regular Platform (RP) implants would have different outcomes in the bilateral single tooth replacements against the alternative hypothesis of no difference.