Your browser doesn't support javascript.
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 9.045
Filtrar
1.
Int J Periodontics Restorative Dent ; 40(4): e157-e162, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32559040

RESUMO

Placement of short implants is a common approach to rehabilitate edentulous areas. The objective of this study was to evaluate the long-term survival of 7.0- and 8.5-mm implants placed in either a delayed or immediate loading protocol. Life table analysis revealed the implants treated with the delayed loading protocol had a 90.9% survival rate and the implants treated with the immediate loading protocol had a survival rate of 92.0%. The results of this 8-year prospective study demonstrate similar survival rates of short, cylindrical threaded implants placed by either a delayed or immediate loading protocol.


Assuntos
Implantes Dentários , Carga Imediata em Implante Dentário , Arcada Edêntula/cirurgia , Implantação Dentária Endo-Óssea , Prótese Dentária Fixada por Implante , Falha de Restauração Dentária , Prótese Parcial Fixa , Estudos Prospectivos
2.
Swiss Dent J ; 130(5): 397-406, 2020 May 11.
Artigo em Alemão | MEDLINE | ID: mdl-32390410

RESUMO

In the prosthetic treatment planning there is an important question either you will have an surgery procedure or you will solve the requirement with a conventional treatment. It requires the discussion with the patient of all different parameters like risk factors in the pink - and white esthetic, condition of the adjacent teeth, outcome, long-term stability, costs, etc. In consideration of all facts a decision must be made of which adequate therapy is feasible. In this case on request of the patient the missing right central incisor will be replaced with a new zirconia-layered ceramicbridge. The article describes the approach in detailed steps how to manage in an easy conservative way the pontic area and how to create an esthetic outcome. Therefore the author manufactured different kind of temporaries and reconfigure them. After the stabilization of the desired result the situation can be transferred in the definitive zirconia framework-design. Final it is the responsibility of the dental technician to get the right colour and more important the right shape of the teeth for an esthetic result.


Assuntos
Estética Dentária , Incisivo , Prótese Parcial Fixa , Humanos
3.
Indian J Dent Res ; 31(2): 323-325, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32436917

RESUMO

A "quack" is defined as "a fraudulent or ignorant pretender to medical skill or a person who pretends, professionally or publicly, to have skill, knowledge, or qualifications he or she does not possess." A number of dental quacks are practicing roadside, making money by doing unethical and unhygienic practice, eventually, hampering the patient's oral and general health. Common quackery practices carried out in India are filling of teeth with acrylic resin, fixing the removable partial denture as fixed partial denture using wires and self-curing acrylic resin, using suction disc on the palatal surface of complete denture to improve retention, etc., leading to a number of unfortunate consequences. In this study, we present a case series of mal-treatments performed by different quacks in Dhule district of Maharashtra (India).


Assuntos
Prótese Parcial Removível , Resinas Acrílicas , Prótese Total , Prótese Parcial Fixa , Feminino , Humanos , Índia , Masculino
4.
Eur Arch Paediatr Dent ; 21(3): 285-293, 2020 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-32266664

RESUMO

AIM: To review currently available evidence regarding the use of mini-screw implant (MSI)-supported pontics for the transitional management of missing permanent maxillary lateral incisors in children and adolescents. METHODS: Indexed databases were searched until October 2019. The following inclusion criteria were imposed: (a) children and adolescents with missing permanent maxillary lateral incisor/s; (b) temporary replacement of missing permanent maxillary lateral incisors with MSI-supported pontics; (c) clinical and radiographic assessment of the outcome [MSI stability and/or alveolar bone (ALB) development]; and (d) follow-up after pontic placement. Commentaries, letters to the Editor, reviews, and studies in adult patients and/or patients with systemic/genetic diseases, with no follow-up, and without clinical and radiographic assessment of the outcome were excluded. RESULTS: Six out of 225 initially-identified studies were included. All studies were case-reports/series. A variability was observed among studies-assessed regarding the treatment protocol such as in the MSI dimensions, loading time and pontic retention protocol. Results from the included studies indicate that the MSI-supported pontics remained stable, with no infraocclusion and angular bony defect formation, ALB levels and bone density were maintained, and there was vertical ALB development during the follow-up period which ranged up to 99 months. Reported complications included MSI loss due to mobility, crown repair/replacement due to discoloration, and gingival impingement. CONCLUSIONS: The limited evidence shows that MSI-supported pontics are useful transitional restorations for missing permanent maxillary lateral incisors in children and adolescents; however, further well-designed clinical trials are needed in this regard.


Assuntos
Incisivo , Maxila , Adolescente , Adulto , Parafusos Ósseos , Criança , Prótese Parcial Fixa , Humanos , Índice Periodontal
5.
J Clin Pediatr Dent ; 44(2): 123-126, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32271662

RESUMO

A modified pontic technique is presented that simplifies the management of patients with missing anterior teeth during the course of comprehensive orthodontic care. This technique demonstrates a lingual arch attached to lingual sheaths with the pontic placed on the lingual arch. Information presented includes appliance design, improved bond strength of the bracket on the pontic tooth, preparing the appliance for use as anchorage, and the incorporation of an anterior biteplate in the appliance. A modified pontic appliance improves esthetics and function when treating patients with missing maxillary anterior teeth.


Assuntos
Incisivo , Procedimentos de Ancoragem Ortodôntica , Prótese Parcial Fixa , Estética Dentária , Humanos , Desenho de Aparelho Ortodôntico , Fios Ortodônticos , Técnicas de Movimentação Dentária
6.
J Am Dent Assoc ; 151(4): 230-238.e7, 2020 04.
Artigo em Inglês | MEDLINE | ID: mdl-32222175

RESUMO

BACKGROUND: The authors aimed to compare the survival and complication rates of zirconia-ceramic (ZC) versus metal-ceramic (MC) restorative material in multiunit tooth-supported posterior fixed dental prostheses (FDP). TYPES OF STUDIES REVIEWED: The authors conducted a systematic search of randomized controlled trials (RCTs), with no time or language restrictions, up to May 2019 using the MEDLINE (PubMed), Scopus, Web of Science, and Cochrane Central Register of Controlled Trials databases, followed by a manual search. RESULTS: The authors included 7 RCTs in the review and 5 RCTs in the meta-analysis. All studies had a low risk of bias. The authors included 330 participants (177 ZC and 173 MC tooth-supported FDP) in the meta-analysis, which revealed a medium-term survival rate of 95.4% (95% confidence interval [CI], 90.5% to 99.1%) for ZC FDP compared with 96.9% (95% CI, 94.3% to 99.4%) for MC FDP, with no significant differences (P = .364). The biological or technical complications did not show statistically significant differences, except in the global ceramic veneering chipping analysis (P = .023; risk difference [RD], 22.3%; 95% CI, 3.0% to 41.6%) and their subanalysis: minor chipping or chipping that can be solved with polishing (P = .044; RD, 19.5%; 95% CI, 0.5% to 38.4%), and major chipping or chipping that needs repair in the laboratory (P = .023; RD, 6.0%; 95% CI, 0.8% to 11.3%). CONCLUSIONS AND PRACTICAL IMPLICATIONS: Posterior multiunit ZC restorations are considered a predictable treatment in the medium term, although they are slightly more susceptible to chipping of the veneering ceramic than MC restorations.


Assuntos
Planejamento de Prótese Dentária , Falha de Restauração Dentária , Prótese Parcial Fixa , Cerâmica , Porcelana Dentária , Ligas Metalo-Cerâmicas , Ensaios Clínicos Controlados Aleatórios como Assunto , Zircônio
7.
Int J Comput Dent ; 23(1): 73-82, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32207463

RESUMO

BACKGROUND: Accurate implant placement in the bone is key to successful implant treatment. Once inserted, it can be difficult to correct the orientation of the implant axis, especially of a one-piece implant. Prosthetic-driven digital implant planning in combination with fully guided implant surgery can offer additional safety in such cases. CASE PRESENTATION: The patient presented with a wide, edentulous interdental space extending from sites 13 to 16, which was to be restored with three one-piece zirconia implants supporting a zirconia fixed partial denture comprizing a cantilever to the mesial aspect. Digital planning based on DICOM (Digital Imaging and Communications in Medicine) and intraoral surface data was performed to ensure optimal positioning. Guided implant placement was executed using a contra-angle handpiece with special attachments and a compatible, sleeveless drill guide. Impressions of the implants for the final restoration were acquired using an intraoral scanner. Reflection-related errors were compensated for by using the given digital abutment geometry. The DICOM and STL datasets were superimposed and used as the basis for fabricating a monolithic zirconia restoration through a subtractive milling process. The final restoration was adhesively cemented. CONCLUSIONS: By using a prosthetic-driven implant planning strategy, it was possible to place the one-piece ceramic implants without an available implant manufacturer's guide-based solution. This was accomplished using a contra-angle surgical handpiece with special attachments and a compatible drill guide. This approach is particularly recommended for the placement of one-piece implants, which otherwise require irreversible abutment grinding for the adjustment of the implant axis orientation after placement. To increase the precision of the digital impressions of the implants, the ideal abutment geometry was imported and superimposed onto the scan data. The results demonstrate that the proposed method can dispense with the need for gingival retraction when acquiring impressions for implants of this type in the future.


Assuntos
Implantes Dentários , Fluxo de Trabalho , Cerâmica , Desenho Assistido por Computador , Prótese Parcial Fixa , Humanos
8.
Hua Xi Kou Qiang Yi Xue Za Zhi ; 38(1): 101-103, 2020 Feb 01.
Artigo em Chinês | MEDLINE | ID: mdl-32037775

RESUMO

This article reports a case of an orthodontic adolescent patient without a right inferior incisor. The right lower canine was used as the abutment. The single-retainer all-ceramic resin-bonded fixed partial denture was used to restore the complete dentition. Thus, the missing space was filled, and the function and aesthetics were restored.


Assuntos
Prótese Adesiva , Adolescente , Cerâmica , Planejamento de Dentadura , Prótese Parcial Fixa , Estética Dentária , Humanos , Incisivo
9.
Int J Prosthodont ; 33(2): 176-183, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32069342

RESUMO

PURPOSE: To evaluate the survival and success rates of post-and-core restorations supporting fixed dental prostheses (FDPs) after a mean time in function of 7 years and to assess the incidences of biologic and technical complications. MATERIALS AND METHODS: Patients from the National Dental Center Singapore (NDCS) with endodontically treated premolars restored with post-retained FDPs from 2007 to 2009 were recruited from the Endodontic Registry and evaluated by three clinicians. A total of 265 patients with 329 treated premolars were examined clinically. Digital radiographs were also obtained. Complications were classified as tooth- or prosthesis-related. Failure and complication rates were calculated based on person-time-at-risk. RESULTS: The mean time in function was 7.1 years. A total of 25 teeth in 23 patients were lost, resulting in a 7-year survival rate of 92.7% (95% CI: 89.5%, 95.0%). The corresponding success rate was 75.1% (95% CI: 70.5%, 79.1%). A total of 40 FDPs failed, resulting in a 7-year prosthetic survival rate of 88.6% (95% CI: 84.8%, 91.5%). Common complications observed were recurrent periodontal disease (3.9%), periapical pathology (7.3%), caries (3.9%), porcelain chipping (9.9%), and tooth fractures (5.0%). For the incidence of tooth fracture, a risk analysis yielded significant associations with the number of occluding teeth (odds ratio: 4.2; 95% CI: 1.1, 16.7) and the number of adjacent teeth (odds ratio: 4.0, 95% CI: 1.5, 10.9). CONCLUSION: Restoration of premolar teeth requiring root canal treatment with a post and core and crown is a viable treatment when premolar teeth have adjacent teeth.


Assuntos
Coroas , Falha de Restauração Dentária , Dente Pré-Molar , Prótese Parcial Fixa , Humanos , Incidência , Estudos Retrospectivos
10.
J Oral Implantol ; 46(3): 175-181, 2020 Jun 01.
Artigo em Inglês | MEDLINE | ID: mdl-32030425

RESUMO

Rehabilitation with implant prostheses in posterior areas requires the maximum number of possible implants due to the greater masticatory load of the region. However, the necessary minimum requirements are not always present in full. This project analyzed the minimum principal stresses (TMiP, representative of the compressive stress) to the friable structures, specifically the vestibular face of the cortical bone and the vestibular and internal/lingual face of the medullary bone. The experimental groups were as follows: the regular splinted group (GR), with a conventional infrastructure on 3 regular-length Morse taper implants (4 × 11 mm); and the regular pontic group (GP), with a pontic infrastructure on 2 regular-length Morse taper implants (4 × 11 mm). The results showed that the TMiP of the cortical and medullary bones were greater for the GP in regions surrounding the implants (especially in the cervical and apical areas of the same region) but they did not reach bone damage levels, at least under the loads applied in this study. It was concluded that greater stress observed in the GP demonstrates greater fragility with this modality of rehabilitation; this should draw the professional's attention to possible biomechanical implications. Whenever possible, professionals should give preference to use of a greater number of implants in the rehabilitation system, with a focus on preserving the supporting tissue with the generation of less intense stresses.


Assuntos
Implantes Dentários , Prótese Dentária Fixada por Implante , Análise do Estresse Dentário , Prótese Parcial Fixa , Análise de Elementos Finitos , Estresse Mecânico
11.
Clin Oral Implants Res ; 31(5): 452-462, 2020 May.
Artigo em Inglês | MEDLINE | ID: mdl-31981374

RESUMO

AIM: To evaluate the clinical and radiological outcomes of one-piece zirconia implants restored with single crowns (SCs) or fixed dental prostheses (FDPs) over an observation period of 5 years in function. MATERIALS AND METHODS: In a prospective cohort investigation with two investigational centers, one-piece zirconia implants were placed in anterior and posterior sites. After a healing period of at least 2 months in the mandible and 4 months in the maxilla with immediate provisional reconstructions, the final all-ceramic SCs or three-unit FDPs were cemented. Patients were followed for 5 years. Clinical parameters and radiological measurements of the implants and the neighboring teeth were assessed. For the statistical analysis, linear mixed models were applied. RESULTS: A total of 71 implants were placed in 60 patients. Sixty-three implants in 53 patients could be evaluated at the 5-year follow-up. Six patients with a total of seven implants were counted as dropouts. One implant did not achieve adequate osseointegration and had to be removed 5 weeks after implantation. The 5-year survival rate was calculated as 98.4% (95% CI 91.6, 99.9). The mean overall marginal bone loss from implant placement to the 5-year follow-up was 0.7 ± 0.6 mm. After an initial mean marginal loss before loading the implants (0.7 mm), no further statistically significant change in marginal bone level (p = .458) could be observed. CONCLUSION: The investigated one-piece zirconia implant showed a high survival rate, very stable marginal bone, and mucosal margin levels after 5 years in function. Therefore, it can be considered safe and reliable for the reconstruction of implant-supported SCs or FDPs over a mid-term period.


Assuntos
Implantes Dentários , Prótese Dentária Fixada por Implante , Coroas , Planejamento de Prótese Dentária , Falha de Restauração Dentária , Prótese Parcial Fixa , Humanos , Estudos Prospectivos , Zircônio
12.
Clin Implant Dent Relat Res ; 22(1): 128-137, 2020 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-31912661

RESUMO

BACKGROUND: Peri-implant soft tissues esthetics varies and depends on the restoration type such as implant-supported single crowns, adjacent multiple single crowns, and fixed partial dentures (FPD). PURPOSE: The aim of this prospective study was to assess the esthetic outcome of the peri-implant soft tissues of (NobelBiocare™) implant-supported single crowns, adjacent multiple single crowns, and FPD. A potential association between the esthetic risk profile and the esthetic outcome was assessed. MATERIALS AND METHODS: Between 03/11 and 03/17, 300 NobelActive implants were installed in 153 partially edentulous patients. Prior to the fabrication of the final restoration, the esthetic risk profile (ERP) of the patient was determined. The pink esthetic score (PES) and white esthetic score (WES) were assessed by three investigators at 6 and 12 months post-insertion of the final restoration. Patients' appreciation was assessed on a visual analogue scale (VAS) at the 1-year follow-up. RESULTS: The clinical acceptable limit for PES (≥6) was achieved in 56% to 68% of the single crowns at 6 and 12 months, respectively. Clinically unacceptable PES scores were recorded for 48% of the adjacent multiple single crowns and 63% of the FPDs at both time points. The association of a high ERP with WES and PESWES was noticed for single implant-supported crowns. For the latter restoration type, a ≤5 mm distance between the crestal bone level and the proximal contact positively influenced the PES and combined PESWES scores. No correlation was found between PES or WES and patient satisfaction. Mesial papilla formation was more pronounced compared to the distal one for the single implant crowns and for implant-supported FPD. CONCLUSION: When high esthetic demands are expected, assessment of ERP prior to implant treatment is advised in order to estimate a realistic outcome.


Assuntos
Implantes Dentários para Um Único Dente , Implantes Dentários , Coroas , Prótese Dentária Fixada por Implante , Prótese Parcial Fixa , Estética Dentária , Humanos , Estudos Prospectivos , Resultado do Tratamento
13.
J Prosthet Dent ; 123(1): 135-142, 2020 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-31027960

RESUMO

STATEMENT OF PROBLEM: Three-dimensional (3D)-printed casts are used successfully as diagnostic casts in orthodontics. However, whether 3D-printed casts are sufficiently accurate to be used as definitive casts for fixed dental prostheses (FDPs) is unclear. PURPOSE: The purpose of this in vitro study was to evaluate the fit of 3-unit FDPs fabricated on 3D-printed casts made by digital light processing and to investigate the clinical applicability of 3D printing. MATERIAL AND METHODS: A master model was fabricated from epoxy resin. Stone casts were made from dual viscosity impressions (conventional stone cast [CS] group, n=10). The 3D-printed casts were fabricated using a 3D printer after obtaining digital virtual casts by digital scans (3D-printed cast [3DP] group, n=10). All FDPs were fabricated with a 5-axis milling machine. The master model and intaglio surface of the milled FDPs was superimposed using 3D analysis software to measure the accuracy. Two-way ANOVA was performed to identify a significant difference between the groups (3DP and CS) and sides (pontic side, nonpontic side) and their interactive effects (α=.05). The Tukey honestly significant difference test was used for post hoc analysis. RESULTS: Two-way ANOVA showed significant differences between the 2 groups (3DP and CS) in the marginal and internal root mean square (RMS) values (P<.001). However, no significant difference was found in the marginal RMS values (P=.762) between the pontic and nonpontic sides. The 3DP showed significantly higher RMS values than the CS (P<.001). CONCLUSIONS: The fit of FDPs produced from 3D-printed casts was inferior to that of conventional stone casts; however, all FDPs showed clinically acceptable accuracy. These results suggest that 3D-printed casts have clinical applicability but that further improvement of the 3D printer is necessary for their application in prosthodontics.


Assuntos
Técnica de Moldagem Odontológica , Modelos Dentários , Desenho Assistido por Computador , Planejamento de Prótese Dentária , Prótese Parcial Fixa , Impressão Tridimensional
14.
J Prosthodont Res ; 64(1): 85-89, 2020 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-31085073

RESUMO

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.


Assuntos
Prótese Parcial Fixa , Prótese Parcial Removível , Prótese Total , Prótese Parcial , Humanos
15.
J Oral Rehabil ; 47(2): 229-234, 2020 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-31452211

RESUMO

OBJECTIVES: To compare the patient-reported effect of treatment with implant-supported fixed prosthesis (ISFP) and fixed dental prosthesis (FDP) in patients with a small number of tooth losses to replace. METHODS: From a population of 155 patients receiving either ISFP or FDP, 68 patients were matched in pairs based on gender, number of teeth replaced, zone of replacement, age and number of remaining teeth. The patient-reported effect was prospectively obtained by measuring change in the short-form oral health impact (OHIP-14) from before to one month after treatment. Effect size (ES), standardised response mean (SRM) and a minimal important difference of two units were applied to estimate the magnitude of the change. RESULTS: Both the ISFP and FDP groups decreased significantly in OHIP-14 after treatment (P < .01). The change was not significantly different between the ISFP and FDP groups. The magnitude of the change was for both treatments moderate and slightly higher in the ISFP group (ES = 0.52 and SRM = 0.58) than in the FDP group (ES = 0.48 and SRM = 0.47). Applying the minimal important difference showed that 23 participants in the ISFP group and 21 in the FDP group had good effect. CONCLUSIONS: The patient-reported effect of treatment with ISFP or FDP was similar, clinically meaningful and of moderate magnitude in patients with a small number tooth losses to replace.


Assuntos
Implantes Dentários , Perda de Dente , Prótese Dentária Fixada por Implante , Falha de Restauração Dentária , Prótese Parcial Fixa , Humanos , Saúde Bucal , Medidas de Resultados Relatados pelo Paciente
16.
J Oral Implantol ; 46(1): 27-34, 2020 Feb 01.
Artigo em Inglês | MEDLINE | ID: mdl-31647692

RESUMO

This study analyzed the biomechanical behavior of rigid and nonrigid tooth-implant supported fixed partial dentures. Different implants were used to observe the load distribution over teeth, implants, and adjacent bone using three-dimensional finite element analysis. A simulation of tooth loss of the first and second right molars was created with an implant placed in the second right molar and a prepared tooth with simulated periodontal ligament (PDL) in the second right premolar. Configurations of two types of implants and their respective abutments-external hexagon (EX) and Morse taper (MT)-were transformed into a 3D format. Metal-ceramic fixed partial dentures were constructed with rigid and nonrigid connections. Mesh generation and data processing were performed on the 3D finite element analysis (FEA) results. Static loading of 50 N (premolar) and 100 N (implant) were applied. When an EX implant was used, with a rigid or nonrigid connection, there was intrusion of the tooth in the distal direction with flexion of the periodontal ligament. Tooth intrusion did not occur when the MT implant was used independent of a rigid or nonrigid connection. The rigid or nonrigid connection resulted in a higher incidence of compressive forces at the cortical bone as well as stress in the abutment/pontic area, regardless of whether EX or MT implants were used. MT implants have a superior biomechanical performance in tooth-implant supported fixed partial dentures. This prevents intrusion of the tooth independent of the connection. Both types of implants studied caused a greater tendency of compressive forces at the crestal area.


Assuntos
Implantes Dentários , Fenômenos Biomecânicos , Dente Suporte , Prótese Dentária Fixada por Implante , Análise do Estresse Dentário , Prótese Parcial Fixa , Análise de Elementos Finitos , Estresse Mecânico
17.
J Prosthet Dent ; 123(5): 686-692.e8, 2020 May.
Artigo em Inglês | MEDLINE | ID: mdl-31703922

RESUMO

STATEMENT OF PROBLEM: Different parameters affect the marginal and internal fit of zirconia fixed partial dentures (FPDs) on natural teeth. Determining a way to optimize these restorations is essential. PURPOSE: The purpose of this systematic review was to determine the variables affecting the marginal fit and internal accuracy of zirconia FPDs on natural teeth. MATERIAL AND METHODS: An electronic search was conducted by 2 independent reviewers by using the MEDLINE, Cochrane, Web of Science, and Scopus databases, as well as Google Scholar, for studies published up to July 2018, and a manual search was conducted from the reference lists of related articles. Eligibility criteria included articles in English published in peer-reviewed journals that assessed the marginal and/or internal adaptation of zirconia FPDs on teeth with 3 or more units, with at least 1 of the experimental groups being frameworks or FPDs fabricated from zirconia. Risk of bias was assessed with the aid of the Cochrane Handbook for Systematic Reviews of Interventions. RESULTS: The search provided 418 records, with 41 fulfilling the inclusion criteria. The selected studies showed considerable heterogeneity regarding materials, state of sintering, manufacturer and computer-aided design and computer-aided manufacturing (CAD-CAM) system, experimental methodology, sample size, and span length. Of the included articles, 36 were in vitro studies and 5 were clinical studies, most of which exhibited high-performance and detection biases. CAD-CAM systems provided more precise marginal and internal fit than CAM systems. An increase of framework span length to 6 or more units decreased both marginal and internal fit. The reported marginal gap tended to increase after the veneering process. The introduction of a conventional impression into an otherwise digital workflow seems to have a negative effect on the marginal fit. CONCLUSIONS: The accuracy of zirconia FPDs or frameworks is considerably influenced by the processing procedure used and the choice of CAD-CAM system.


Assuntos
Desenho Assistido por Computador , Adaptação Marginal Dentária , Prótese Parcial Fixa , Zircônio
18.
J Oral Implantol ; 46(1): 57-61, 2020 Feb 01.
Artigo em Inglês | MEDLINE | ID: mdl-31580773

RESUMO

A 62-year-old male patient sought treatment for missing maxillary teeth. A diagnostic cast demonstrated that the interocclusal distance was insufficient. A 5-unit screw-retained implant-supported fixed partial denture (FPD) was used to restore missing maxillary teeth. The restoration of multiple missing teeth using an implant-supported FPD is challenging when the interocclusal distance is limited due to lack of retention and inadequate esthetics. In this case, a hexagonal, screw-retained, and subgingivally located titanium-based zirconia implant-supported FPD with a conical abutment base was used for restoration to overcome the limited interocclusal distance. This implant-supported FPD, consisting of CAD/CAM-designed monolithic zirconia cemented to a titanium bonding base in the laboratory, is expected to facilitate predictable retention and adequate esthetics as well as provide ease of retrieval.


Assuntos
Prótese Dentária Fixada por Implante , Titânio , Desenho Assistido por Computador , Prótese Parcial Fixa , Estética Dentária , Humanos , Masculino , Pessoa de Meia-Idade , Zircônio
19.
J Prosthet Dent ; 123(2): 210-214, 2020 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-31202553

RESUMO

The accurate transfer of the subgingival contours of implant-supported restorations and pontics is essential for providing the dental technician with the necessary information to fabricate an optimal definitive fixed dental prosthesis. However, once the interim restoration is removed to make an impression, the subgingival tissue, which is no longer physically supported, tends to collapse. This digital intraoral and extraoral scanning technique offers a way to transfer the subgingival contours and intaglio surface of the interim restoration to the definitive restoration. In addition, this technique can reduce clinical and laboratory time, as well as the necessity of storing gypsum casts.


Assuntos
Implantes Dentários , Técnica de Moldagem Odontológica , Materiais para Moldagem Odontológica , Planejamento de Prótese Dentária , Prótese Dentária Fixada por Implante , Prótese Parcial Fixa
20.
Beijing Da Xue Xue Bao Yi Xue Ban ; 51(6): 1119-1123, 2019 Dec 18.
Artigo em Chinês | MEDLINE | ID: mdl-31848515

RESUMO

OBJECTIVE: To analyze changes in occlusal force distribution and occlusal contact in posterior partial fixed implant-supported prostheses over time, and to provide reference for the precise occlusion design, adjustment and maintenance of implant prostheses. METHODS: According to certain inclusion and exclusion criteria, patients were recruited from partially edentulous patients who had received implant-supported single crown or fixed bridge in the posterior region. The patients were collected since the implant prostheses settling and scheduled for the routine examination of implant prostheses and the occlusal examinations of complete dentition after 2 weeks, 3, 6, and 12 months. Occlusal examinations were taken with the articulating papers and T-Scan III (Tekscan, South Boston, USA), which could check and measure the occlusal contact condition of complete dentition. The occlusion time and relative occlusal forces of implant prostheses, mesial adjacent teeth and control teeth were recorded at the same time. RESULTS: Thirty-seven posterior partial fixed implant prostheses in 33 patients (17 women and 16 men, aged 24-70 years) were followed up for 3-12 months (average 8.3 months). At baseline, the relative occlusal forces of implant prostheses were significantly lower than those of the corresponding control teeth (P<0.001). However, after 3 months, the relative occlusal forces of implant prostheses had significantly increased (P<0.05), while control teeth decreased significantly (P<0.05), resulting in no statistical significance between them. The implant prostheses occlusion time ratio also increased significantly from 2 weeks to 3 months (P<0.05). There was no significant difference from the third month to the sixth month, or from the sixth month to the twelfth month (P>0.05). CONCLUSION: Light contact and time-delayed occlusion of posterior implant prostheses changes significantly in the first three months after settling implant prostheses. These changes mainly include the advance of the time point of the implant prosthesis to start the occlusion contact, and the increase of the occlusal force of the implant prosthesis. The occlusion of posterior implant prostheses should be carefully monitored at end of the third month follow-up clinically.


Assuntos
Boca Edêntula , Adulto , Idoso , Força de Mordida , Coroas , Prótese Dentária Fixada por Implante , Prótese Parcial Fixa , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Adulto Jovem
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA