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Clinical Oral Implants Research Oct 2018The tasks of this working group were to evaluate the existing evidence on the efficiency and efficacy of the digital and conventional workflows for the fabrication of...
OBJECTIVES
The tasks of this working group were to evaluate the existing evidence on the efficiency and efficacy of the digital and conventional workflows for the fabrication of fixed implant reconstructions, to assess the performance of all-ceramic fixed implant reconstructions and, finally, to evaluate the outcomes of internally and externally connected implant abutments and reconstructions.
METHODS
Four reviews were available analyzing the current literature on the respective topics. One review dealt with the efficiency and efficacy of digital and conventional fabrication workflows. Two reviews analyzed the outcomes of all-ceramic fixed implant reconstructions, one focusing on single-implant reconstructions and the other evaluating multiple-unit implant fixed dental prostheses (FDPs). The fourth review evaluated the clinical outcome on external, respectively, internal implant-abutment connections. These reviews were the basis for the discussions within the group and at the plenary sessions.
RESULTS
The present consensus report gives the consensus statements, the clinical recommendations, and the implications for future research as discussed and approved by the plenum of the consensus conference. The four manuscripts by Mühlemann et al., Rabel et al., Pieralli et al., and Pjetursson et al. are published as part of the journal supplement of the present EAO consensus conference.
Topics: Ceramics; Computer-Aided Design; Crowns; Dental Abutments; Dental Implant-Abutment Design; Dental Materials; Dental Prosthesis Design; Dental Prosthesis, Implant-Supported; Denture Design; Humans
PubMed: 30306691
DOI: 10.1111/clr.13302 -
The International Journal of... 2022To quantify the effect of support stiffness on the retention forces of telescopic crowns and to evaluate a prototype attachment system incorporating a nickel-titanium...
PURPOSE
To quantify the effect of support stiffness on the retention forces of telescopic crowns and to evaluate a prototype attachment system incorporating a nickel-titanium element.
MATERIALS AND METHODS
In the first part of the study, telescopic crowns were fabricated employing standard laboratory procedures. For six combinations of telescopic crowns, the separation force was determined while varying the stiffness of their supporting implants. In the second study part, an in vitro mandibular model with three interforaminal implants was equipped with strain gauges and extensometers. Two prostheses either employing cylindrical telescopic crowns or prototype attachments were fabricated and statically loaded on the model using either the midline or the left canine or both canine implants for support while strain in the peri-implant area and prosthesis displacement were recorded. Statistical analysis of both study parts was based on pairwise comparisons with the level of significance set at α = .05.
RESULTS
With one exception (P = .161), for each assembly of two telescopic crowns, the separating force was always dependent on the stiffness of the supporting implants. With 3 exceptions out of a total of 14 comparisons for peri-implant strain and prosthesis displacement, the use of the prototype attachments always led to significantly lower mean values compared to the use of cylindrical telescopes (P < .00).
CONCLUSION
The individual retention force of telescopic crowns on implants should be set at a lower level compared to telescopic crowns on natural abutments. Incorporating a nickel-titanium element into attachment systems for implant-supported removable prostheses reduces peri-implant strain and may facilitate the use of telescopic crowns.
Topics: Crowns; Dental Implants; Dental Prosthesis, Implant-Supported; Denture Retention; Denture, Overlay; Mandible
PubMed: 33651028
DOI: 10.11607/ijp.6875 -
Journal of Prosthodontic Research Jan 2020To investigate occlusal wear of resin denture teeth in partial removable dental prostheses worn by partially edentulous patients.
PURPOSE
To investigate occlusal wear of resin denture teeth in partial removable dental prostheses worn by partially edentulous patients.
METHODS
Thirty patients with partial removable dental prostheses were included in the study. Thirty-two patients with complete dentures served as a reference group. Occlusal wear after two years was evaluated indirectly using gypsum casts and a three-dimensional laser-scanner device. Overall wear of complete occlusal surfaces and maximum wear of occlusal contact areas were measured. Patient and prosthesis data were analyzed using univariate and multiple linear mixed models.
RESULTS
Overall wear of denture teeth in partial removable dental prostheses was 91 (SD 85) μm, and maximum wear of occlusal contact areas was 329 (SD 204) μm (means and standard deviations). Average and maximum wear values for teeth in complete dentures were both lower than those for teeth in partial removable dental prostheses. However, differences between wear of different types of denture did not reach statistical significance after adjustment for gender, type of tooth, dental status of the opposing jaw, and antagonist material. Statistical analysis revealed that wear was greater for denture teeth occluding with ceramic crowns and/or fixed partial dentures as antagonists.
CONCLUSIONS
Resin denture teeth in partial removable and complete dental prostheses are subjected to clinically important occlusal wear that might destabilize occlusion and cause further problems. Patient-related factors and dental status affect wear behavior and should be taken into consideration when treating patients with removable dentures.
Topics: Denture, Complete; Denture, Partial; Denture, Partial, Fixed; Denture, Partial, Removable; Humans
PubMed: 31085073
DOI: 10.1016/j.jpor.2019.04.004 -
Journal of Prosthodontic Research Oct 2021Purpose This study aimed to determine the influence of mandibular free-end partial edentulism and use of conventional or implant-supported removable dental prostheses in...
Purpose This study aimed to determine the influence of mandibular free-end partial edentulism and use of conventional or implant-supported removable dental prostheses in the partially edentulous area on the load exerted on the maxillary anterior teeth.Methods A jaw model with mandibular free-end missing teeth was used, and a distal extension, removable partial dental prosthesis was fabricated to replace the missing posterior teeth. Four experimental conditions were set up: 1) without prosthesis, 2) with a conventional removable partial dental prosthesis, 3) with an implant-supported removable partial dental prosthesis, and 4) with a complete dental arch. Strain gauges were attached to the root surface of the maxillary left central incisor, canine, first premolar, and first molar. The load exerted on them was calculated based on the calibration coefficient. An occlusal load of 49 N was applied, and the forces were compared using a Kruskal-Wallis test (P < 0.05). Results The load exerted on the maxillary anterior teeth increased significantly with no prosthesis, decreased significantly with a conventional removable partial dental prosthesis, and decreased even more significantly with an implant-supported removable partial dental prosthesis. Conclusions The burden on the maxillary anterior teeth decreased with the use of a removable partial dental prosthesis and decreased even further with the use of an implant-supported dental prosthesis. The use of an implant to support a distal extension removable partial dental prosthesis is potentially effective in preserving the remaining teeth and tissues by reducing excessive stress in patients with mandibular free-end partial edentulism.
Topics: Dental Implants; Dental Prosthesis, Implant-Supported; Denture, Partial, Removable; Humans; Mandible
PubMed: 33896889
DOI: 10.2186/jpr.JPR_D_20_00077 -
Clinical Oral Investigations Sep 2016The present systematic review aimed at assessing data from the literature on endodontic and prosthetic complications in endodontically treated teeth restored with fiber... (Review)
Review
OBJECTIVE
The present systematic review aimed at assessing data from the literature on endodontic and prosthetic complications in endodontically treated teeth restored with fiber posts and single crowns (SCs) or fixed dental prostheses (FDPs).
MATERIALS AND METHODS
Available randomized controlled clinical trials evaluating endodontic and prosthetic complications in the teeth treated with fiber posts and restored with different prosthetic restorations were reviewed. PubMed, Evidence-Based Dentistry, BMJ Clinical Evidence, Embase, DynaMed, and gray literature restricted to scientific literature were analyzed; also, manual researches were performed. English language and time filters (from 1990 to 2015) were used.
RESULTS
The database search produced 4230 records, many of which were duplicates. The manual research did not produce any other relevant article. After duplications were removed, all the selected databases produced 3670 records. Reading titles and abstracts, two independent reviewers excluded 3664 reports. The full-texts of the remaining six reports were read. Only four studies met the inclusion criteria and were included in this systematic review.
CONCLUSIONS
The most frequently reported failures in the available studies were as follows: fiber post debonding, loss of retention of single crowns, and marginal gaps. Less frequently, chippings and fractures were recorded in SCs. No studies about complications related to FDPs were found.
CLINICAL RELEVANCE
A correlation between the failure rates of fiber posts and the type of prosthetic restorations just like SCs and FDPs cannot be found to date. Further randomized controlled clinical studies are required to achieve evidence-based conclusions, particularly about the use of fiber posts with FDPs.
Topics: Crowns; Dental Prosthesis; Dental Prosthesis Design; Dental Restoration Failure; Humans; Post and Core Technique; Postoperative Complications; Root Canal Therapy; Tooth, Nonvital
PubMed: 27460566
DOI: 10.1007/s00784-016-1919-8 -
The International Journal of Oral &... 2021The aim of this study was to evaluate the clinical use of a high-performance polymer, polyether ether ketone (PEEK), as a material for use in provisional fixed dental...
PURPOSE
The aim of this study was to evaluate the clinical use of a high-performance polymer, polyether ether ketone (PEEK), as a material for use in provisional fixed dental prostheses (FDPs) that can be retained by reciprocated guide surfaces of hexagonal-shaped healing abutments during dental implant treatment.
MATERIALS AND METHODS
Patients requiring teeth replacement with dental implants for partially and fully edentulous cases in the maxilla and mandible were included. The provisional FDP was fabricated with hex castable copings and PEEK granules using the lost wax technique. The common path of insertion was established by reducing the coping that is in obstruction to the healing abutment. Retention was provided by the reciprocated guide surfaces of multiple hexagonal-shaped healing abutments.
RESULTS
Twenty-three custom provisional PEEK FDPs supported by 166 implants in 20 partially and fully edentulous patients were provided during the treatment period. The mean functional periods of the provisional PEEK FDPs for maxillary and mandibular cases were 6.95 ± 0.84 months and 1.90 ± 0.62 months, respectively. All provisional PEEK FDPs functioned as intended for the entire treatment period. There were a total of 10 complications: 4 cases had resin and denture veneers debond from the PEEK framework; 3 partially edentulous cases required supplementary screw retention; and 3 implants in separate cases did not osseointegrate, requiring extended use of the provisional prosthesis. Two provisional mandibular PEEK FDPs with prolonged usage (over 2 years) were excluded from calculations. No fracture of the PEEK framework was observed.
CONCLUSION
The results from this study suggest that PEEK can be a suitable material for use in provisional FDPs during dental implant treatment. Prosthetic complications were frequent but were resolved intraorally. The reciprocated guide surfaces of multiple hexagonal-shaped healing abutments can provide adequate retention and resistance for edentulous cases during the implant treatment period. However, in partially edentulous cases, a prosthesis without cross-arch stabilization supplementary screw retention was required.
Topics: Benzophenones; Dental Abutments; Dental Implants; Dental Prosthesis Design; Dental Prosthesis, Implant-Supported; Dental Restoration Failure; Follow-Up Studies; Humans; Ketones; Polyethylene Glycols; Polymers
PubMed: 34115075
DOI: 10.11607/jomi.8465 -
The Journal of Oral Implantology Dec 2019The purpose of this study is to analyze 1- and 3-year clinical performances of narrow diameter implants (NDIs) versus regular diameter implants (RDIs). A search of... (Meta-Analysis)
Meta-Analysis
The purpose of this study is to analyze 1- and 3-year clinical performances of narrow diameter implants (NDIs) versus regular diameter implants (RDIs). A search of electronic databases and a manual search was performed for the time period January 2000 to April 2018. A meta-regression was used to evaluate the effects of the "fixed effects" model on the implant survival rates, prosthesis success rates and marginal bone loss (MBL) with follow-up time of 1 year and 3 years. Of the 11 studies included, the overall combined 1-year implant survival rates were 98.14% for NDIs and 98.20% for RDIs. The overall combined 3-year implant survival rates were 98.71% for NDIs and 98.84% for RDIs. The corresponding values for 1-year prosthesis success rates were 96.94% for NDIs and 99.25% for RDIs. The corresponding values for 3-year prosthesis success rates were 89.25% for NDIs and 96.55% for RDIs. The meta-regression showed no significant differences between NDIs and RDIs regarding implant survival rates, prosthesis success rates, and MBL in 1-year and 3-year follow-up ( > .05). The results of this meta-analysis concluded that the implant diameter did not affect its survival rates, prosthesis success rates, and MBL in 1 and 3 years. The use of NDIs instead of bone augmentation procedures with RDIs did not affect its survival rates, prosthesis success rates, and MBL in the short-term and middle-term. However, more high-quality randomized controlled trials and long follow-up studies are needed on this topic.
Topics: Alveolar Bone Loss; Dental Implants; Dental Prosthesis Design; Dental Prosthesis, Implant-Supported; Dental Restoration Failure; Follow-Up Studies; Humans
PubMed: 31536434
DOI: 10.1563/aaid-joi-D-19-00025 -
The Journal of Contemporary Dental... Sep 2022
Topics: Dental Cements; Dental Implants; Glass Ionomer Cements; Bone Screws; Dental Prosthesis, Implant-Supported; Cementation; Crowns; Dental Prosthesis Retention; Dental Restoration Failure
PubMed: 37282989
DOI: 10.5005/jp-journals-10024-3355 -
European Journal of Oral Implantology 2018A large variety of dental materials are available for the production of implant-supported fixed restorations. Materials with different properties are likely to behave...
AIM
A large variety of dental materials are available for the production of implant-supported fixed restorations. Materials with different properties are likely to behave differently during clinical function, which may result in different prevalence and types of complications. The aim of the present review was to summarise, analyse and discuss the prevalence and types of complications or failures related to dental materials in implant-supported restorations.
MATERIALS AND METHODS
A strategy was set up using the PICO format and the search was performed using the PubMed database, including a hand search of reference lists. Two independent reviewers selected papers based on a set of criteria. The number of events of complications was summarised.
RESULTS
The initial search produced 2764 titles. After application of criteria, 47 publications were selected for analysis. Seventeen studies reported on 1447 single crowns and 30 studies reported on 2190 fixed dental prostheses. The most common complications were fracture or chipping of the veneer material, loss of retention and lost access hole fillings. Due to the heterogeneity of studies, and large variation in number of restorations per material group, no conclusive correlation between type of material and type of technical complication and/or failure could be established.
CONCLUSIONS
The review did not succeed in providing convincing evidence to answer the question concerning a possible relationship between restoration materials and prevalence of technical complications in implant-supported restorations.
Topics: Crowns; Dental Implants; Dental Materials; Dental Prosthesis Design; Dental Prosthesis, Implant-Supported; Dental Restoration Failure; Denture, Partial, Fixed; Humans
PubMed: 30109306
DOI: No ID Found -
Hua Xi Kou Qiang Yi Xue Za Zhi = Huaxi... Feb 2018The occlusion design of dental implants is related to the growing popularity of dental implantology. This paper discusses the occlusion design of the edentulous implant...
The occlusion design of dental implants is related to the growing popularity of dental implantology. This paper discusses the occlusion design of the edentulous implant prosthesis and the relationships between stress change and the alveolar bone and between the occlusal design and implantation complications. The horizontal relationship of condyle, the design of the canine-guided occlusion, and the similarities and differences between the dental implant and the natural teeth on biteforce response are mentioned.
Topics: Alveolar Bone Loss; Dental Implantation, Endosseous; Dental Implants; Dental Occlusion; Dental Prosthesis Design; Dental Prosthesis, Implant-Supported; Dental Restoration Failure; Humans; Jaw, Edentulous; Jaw, Edentulous, Partially
PubMed: 29594987
DOI: 10.7518/hxkq.2018.01.001