Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 4.037
Filtrar
1.
Int J Prosthodont ; 34(1): 7-12, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-33570514

RESUMEN

PURPOSE: To determine whether the use of implant-supported overdentures (IODs) with different attachments influences the Mini Nutritional Assessment (MNA) and Geriatric Oral Health Assessment Index (GOHAI) scores in edentulous patients > 65 years of age. MATERIALS AND METHODS: The MNA and GOHAI were administered to 54 edentulous patients > 65 years of age (mean age = 68.35 ± 4.1 years) before treatment (A) and 6 months after treatment (B): 10 with maxillary + mandibular conventional complete dentures (CDs); 10 with a maxillary conventional CD + mandibular magnetic-retained IOD; 12 with a maxillary conventional CD + mandibular ball-retained IOD; 12 with a maxillary conventional CD + mandibular Locator-retained IOD; and 10 with a maxillary conventional CD + mandibular bar-retained IOD. Statistical differences between treatment types were evaluated using one-way analysis of variance and paired-sample t tests. The correlation between MNA and GOHAI scores was determined using Pearson correlation analysis (α = .05). RESULTS: The difference between mean GOHAI-A and GOHAI-B scores was statistically significant for each type of denture (P < .005). The difference between the mean MNA-A and MNA-B scores was statistically significant for all types of denture except for conventional CDs (P < .05). There was a statistically significant positive correlation between MNA and GOHAI scores (P < .01). CONCLUSION: Regardless of the type of denture used, treatment of edentulous geriatric patients is important for improving nutritional status and self-rated oral health.


Asunto(s)
Implantes Dentales , Calidad de Vida , Anciano , Preescolar , Prótesis Dental de Soporte Implantado , Retención de Dentadura , Dentadura Completa , Dentadura Completa Inferior , Prótesis de Recubrimiento , Humanos , Estado Nutricional , Satisfacción del Paciente
2.
Int J Prosthodont ; 34: s85-s92, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-33571328

RESUMEN

PURPOSE: To evaluate the current literature and provide clinical recommendations related to the number of implants, implant characteristics, loading protocols, survival rates, biologic and mechanical complications, patient satisfaction, and financial considerations for mandibular implant-supported full-arch prostheses. MATERIALS AND METHODS: A PubMed/MEDLINE search for literature published between January 1, 1980 and February 8, 2019, was performed for systematic reviews on this topic. The PICO question was: In mandibular fully edentulous patients treated with implant full-arch prostheses, is there any difference between fixed and removable implant prostheses in terms of implant and prosthesis survival rates? Only systematic reviews with or without meta-analyses were included. The findings varied based on the type of implant full-arch prosthesis. RESULTS: High survival rates for implants and prostheses have been reported for fixed and removable implant full-arch prostheses in the mandible. Immediate loading procedures present with high survival rates for both fixed and removable prostheses. There are differences in the number of implants, implant characteristics, complications, and financial implications between these two types of prostheses, which clinicians need to account for as part of the treatment planning process. CONCLUSION: Implant-supported overdentures and implant-supported fixed complete dentures represent clinically successful treatment approaches. In cases where both treatment options are indicated, patient expectations and cost should be the determining factors for selecting a treatment modality.


Asunto(s)
Implantes Dentales , Prótesis Dental de Soporte Implantado , Dentadura Completa , Prótesis de Recubrimiento , Estudios de Seguimiento , Humanos , Mandíbula/cirugía , Resultado del Tratamiento
3.
Int J Oral Maxillofac Implants ; 36(1): 94-102, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-33600528

RESUMEN

PURPOSE: To examine the effect of the attachment features (abutment height, retention, and freedom of rotation) of implant overdentures on the bending strain around implants under an overdenture. MATERIALS AND METHODS: Mandibular and maxillary edentulous models were fabricated and covered with silicone rubber. Strain gauges were attached to the four sides of each implant. Two implants (tissue-level implant, 4.1-mm diameter, 10-mm length) were placed bilaterally in the area between the mandibular canines and lateral incisors. A maxillary conventional denture and a mandibular overdenture were made to fit the edentulous models. Three levels of peri-implant bone resorption were created sequentially: no bone resorption, 0.8 mm, and 1.5 mm. Three kinds of attachments (magnetic, stud, and ball attachments) were used. Bending strains generated from a 98-N occlusal load through the maxillary denture were measured using a sensor interface, and the data were analyzed using the Kruskal-Wallis and Bonferroni tests. Multiple regression analysis was used to find the relationship between independent variables (peri-implant bone resorption level, abutment height, retention, and freedom of rotation) and the dependent variable (bending strain). RESULTS: For all attachment types, the bending strains were smallest with no bone resorption and largest with 1.5-mm bone resorption (P < .05). Multiple regression analysis showed that abutment height had the greatest impact on the reduction of bending strain (beta = .413), followed by freedom of rotation (beta = -.349), and retention (beta = .107). CONCLUSION: Low abutment height, large freedom of rotation, and low retention can minimize bending strain around implants.


Asunto(s)
Implantes Dentales , Prótesis de Recubrimiento , Prótesis Dental de Soporte Implantado , Retención de Dentadura , Mandíbula/cirugía
4.
J Prosthet Dent ; 125(1): 138.e1-138.e8, 2021 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-33393474

RESUMEN

STATEMENT OF PROBLEM: Mini implants (<3 mm in diameter) are being used as an alternative to standard implants for implant-retained mandibular overdentures; however, they may exhibit higher stresses at the crestal level. PURPOSE: The purpose of this finite element analysis study was to evaluate the biomechanical behavior (stress distribution pattern) in the mandibular overdenture, mucosa, bone, and implants when retained with 2 standard implants or 2 mini implants under unilateral or bilateral loading conditions. MATERIAL AND METHODS: A patient with edentulous mandible and his denture was scanned with cone beam computed tomography (CBCT), and a 3D mandibular model was created in the Mimics software program by using the CBCT digital imaging and communications in medicine (DICOM) images. The model was transferred to the 3Matics software program to form a 2-mm-thick mucosal layer and to assemble the denture DICOM file. A 12-mm-long standard implant (Ø3.5 mm) and a mini dental implant (Ø2.5 mm) along with the LOCATOR male attachments (height 4 mm) were designed by using the SOLIDWORKS software program. Two standard or 2 mini implants in the canine region were embedded separately in the 3D assembled model. The base of the mandible was fixed, and vertical compressive loads of 100 N were applied unilaterally and bilaterally in the first molar region. The material properties for acrylic resin (denture), titanium (implants), mucosa (tissue), and bone (mandible) were allocated. Maximum von Mises stress and strain values were obtained and analyzed. RESULTS: Maximum stresses of 9.78 MPa (bilaterally) and 11.98 MPa (unilaterally) were observed in 2 mini implants as compared with 3.12 MPa (bilaterally) and 3.81 MPa (unilaterally) in 2 standard implants. The stress values in the mandible were observed to be almost double the mini implants as compared with the standard implants. The stresses in the denture were in the range of 3.21 MPa and 3.83 MPa and in the mucosa of 0.68 MPa and 0.7 MPa for 2 implants under unilateral and bilateral loading conditions. The strain values shown similar trends with both implant types under bilateral and unilateral loading. CONCLUSIONS: Two mini implants generated an average of 68.15% more stress than standard implants. The 2 standard implant-retained overdenture showed less stress concentration in and around implants than mini implant-retained overdentures.


Asunto(s)
Implantes Dentales , Prótesis de Recubrimiento , Prótesis Dental de Soporte Implantado , Análisis del Estrés Dental , Retención de Dentadura , Análisis de Elementos Finitos , Humanos , Mandíbula/diagnóstico por imagen , Estándares de Referencia , Estrés Mecánico
5.
Dent Clin North Am ; 65(1): 135-165, 2021 01.
Artículo en Inglés | MEDLINE | ID: mdl-33213707

RESUMEN

More patients are requesting fixed prosthesis to replace missing teeth. More than 5 million dental implants are placed annually in the United States. This number will decrease in 2020 owing to the coronavirus disease-19 pandemic. The edentulous patient has a decreased quality of life. Prosthodontic rehabilitation/reconstruction of edentulism improves overall quality of life. Patient-reported outcome measures are subjective reports of patients' perceptions of their oral health status and the impact that it has on their quality of life. This chapter contains a variety of prosthodontic principles for the reader to help satisfy the needs and expectations of the patient.


Asunto(s)
Infecciones por Coronavirus , Coronavirus , Implantes Dentales , Arcada Edéntula , Pandemias , Neumonía Viral , Betacoronavirus , Prótesis Dental de Soporte Implantado , Prótesis de Recubrimiento , Humanos , Pandemias/prevención & control , Calidad de Vida
6.
Rev. Asoc. Odontol. Argent ; 108(3): 97-103, dic. 2020. ilus, graf
Artículo en Español | LILACS | ID: biblio-1147414

RESUMEN

Objetivo: Evaluar el porcentaje de implantes oseointegrados colocados en pacientes edéntulos para la confección de sobredentaduras inferiores, en el marco de la formación de recursos humanos. Materiales y métodos: Se analizaron las historias clínicas de los pacientes que recibieron dos implantes dentales inferiores para la confección de sobredentaduras en el servicio de residentes de la carrera de Especialización en Cirugía y Traumatología Bucomaxilofacial de la Facultad de Odontología de la Universidad de Buenos Aires, entre agosto de 2012 y diciembre de 2018. Se consideraron para el análisis el porcentaje de implantes oseointegrados y su relación con el tipo de operador (docente o residente), la situación del reborde óseo y el hábito de fumar. Resultados: De los 176 implantes colocados en 88 pacientes (edad promedio = 67 años), a los 3-4 meses el 98% (IC95: 94-99%) se hallaba oseointegrado. No se encontró una relación estadísticamente significativa entre el tipo de operador y el fracaso (P>0,99) Conclusión: En un servicio de formación, la tasa de éxito, evaluada en la segunda cirugía, de dos implantes dentales colocados en el maxilar inferior para sobredentaduras fue de 98%. No se hallaron diferencias entre los resultados logrados por residentes y docentes del servicio (AU)


Aim: To evaluate the percentage of osseointegrated im- plants placed in edentulous patients to restore with mandib- ular overdentures, within the post graduate dental training framework. Materials and methods: Medical records of patients who received two dental implants in the mandible for the placement of overdentures in the resident clinic of the special- ization career in Oral and Maxillofacial Surgery and Trauma- tology from the Facultad de Odontología de la Universidad de Buenos Aires, between August 2012 and December 2018. The percentage of osseointegrated implants was analysed, and the association with the variables: operator (teacher or resident), mediate or immediate placement, and smoking. Results: 176 implants were placed in 88 patients with an average age of 67 years old. 98% (IC95: 94-99%) of the implants were osseointegrated at 3-4 months. No statistically significant association was detected between the type of oper- ator and implant failure (P>0.99). Conclusion: In the teaching dental training clinic, the success rate, evaluated at the second implant stage surgery, of two dental implants placed in the mandibule for overden- tures was 98%. No differences were found between the results achieved by residents and teachers (AU)


Asunto(s)
Humanos , Masculino , Femenino , Anciano , Boca Edéntula , Implantación Dental Endoósea , Prótesis de Recubrimiento , Educación de Posgrado en Odontología , Argentina , Facultades de Odontología , Análisis Estadístico , Estudios Retrospectivos , Oseointegración , Resultado del Tratamiento
7.
Braz Dent J ; 31(6): 657-663, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-33237238

RESUMEN

The aim of this study was to evaluate the effect of cleaning solutions on the retention force of o-ring-type overdenture attachments. The effect of four solutions on nitrile rings were evaluated: Cepacol (C), Cepacol with fluoride (CF), Listerine (L) and 0.05% sodium hypochlorite (SH); deionized water (DW) was used as a control. Matrices containing two implants and abutments and acrylic specimens with the metal capsules were obtained and divided into the groups. A simulation of 90 overnight immersions (8 h) was performed, and the tensile strength value was obtained at the beginning (T0) and in every 30 days (T1, T2 and T3) (n=6). In order to analyze o-ring surface damage after the immersions, a scanning electron microscopy (SEM) was used (n=1). For statistical analysis of the results, analysis of variance (ANOVA) and multiple comparisons with Bonferroni adjustment (test power=1.000; a=0.05) were used. There was a significant difference for the factors time (p<0.001), solution (p<0.001) and for the interaction time × solution (p<0.001). Considering the times of each solution, only for DW there was no significant loss of retention over time. Comparing the solutions in each moment, there was no difference among the solutions in T0. From T1, CF and SH provided less retention than DW (p<0.005). Through SEM it was possible to observe changes in the surface of the CF and SH nitrile o-rings. CF and SH should be avoided due to deleterious action in o-rings.


Asunto(s)
Prótesis de Recubrimiento , Hipoclorito de Sodio , Prótesis Dental de Soporte Implantado , Análisis del Estrés Dental , Retención de Dentadura , Ensayo de Materiales , Resistencia a la Tracción
8.
Braz Dent J ; 31(4): 399-403, 2020 Sep 04.
Artículo en Inglés | MEDLINE | ID: mdl-32901716

RESUMEN

This cross-sectional observational study with 24 patients evaluated differences in bite force (BF) and masticatory performance (MP) between conventional complete denture (CCD) and implant mandibular overdenture (IMO) users and the correlation between these variables. The BF test was performed bilaterally with an occlusal force device. During the MP test, patients were asked to chew Optocal particles for 40 cycles. The Shapiro Wilk test was employed to verify the normality of the data, the student t test to identify differences between groups, and Pearson's correlation to investigate interrelationships between variables. A multiple linear regression was subsequently performed via the stepwise method. P values ≤0.05 were considered statistically significant. Unlike IMO users, CCD users presented a significant difference (25.6%) in BF between the dominant and non-dominant chewing side (p=0.04). IMO users presented significantly higher BF (p=0.01) without presenting a dominant side (p=0.38), and also performed significantly better for the following MP parameters: MPX50 values decreased by 27.25% in IMO users (p=0.01), MPB decreased by 48.38% (p=0.01), and ME 5.6 decreased by 53.25% (p=0.02), while ME2.8 increased by 151.57% (p=0.01). The BF and MPX50 in the IMO wearers group were negatively correlated (-0.57; p=0.05); this correlation coefficient was the only parameter included in the multivariate regression model. IMO users have higher BF and better masticatory performance than CCD users, especially in terms of chewed particles size reduction. MP is correlated with a higher BF in IMO users through better particle trituration.


Asunto(s)
Fuerza de la Mordida , Prótesis de Recubrimiento , Estudios Transversales , Dentadura Completa , Humanos , Mandíbula
9.
Int J Prosthodont ; 33(5): 572-575, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-32956439

RESUMEN

A 54-year-old woman presented with severe maxillary resorption, which resulted in an unstable maxillary removable denture. Due to poor anatomical conditions, the prosthodontic solution posed for the patient was an implant-supported maxillary overdenture based on four implants. This report presents the detailed workflow for CAD/CAM-fabricated, individually milled zirconia bars and an electroplated superstructure framework for an implant-supported removable overdenture, which enabled good retention and an optimal esthetic result. A critical element in the present case was the production of electroplated secondary elements, which are highly precise, with a homogenous layer of gold. No retention loss was observed after 12 months in use.


Asunto(s)
Implantes Dentales , Prótesis de Recubrimiento , Prótesis Dental de Soporte Implantado , Retención de Dentadura , Estética Dental , Femenino , Oro , Humanos , Persona de Mediana Edad , Circonio
10.
Int J Prosthodont ; 33(5): 576-581, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-32956440

RESUMEN

A new-generation mini-implant system offers a polyether ether ketone matrix and a new-generation surface technology on its patrix. This clinical report describes the treatment of a patient with a new-generation mini-implant-retained maxillary overdenture.


Asunto(s)
Implantes Dentales , Prótesis de Recubrimiento , Prótesis Dental de Soporte Implantado , Retención de Dentadura , Humanos , Maxilar
11.
Minerva Stomatol ; 69(4): 256-268, 2020 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-32945635

RESUMEN

INTRODUCTION: In this systematic review, several masticatory function parameters assessed during mandibular single-implant overdenture (SIO) use were compared to pre- SIO placement values in edentulous patients with aim of contributing to a consensus regarding denture treatment options. EVIDENCE ACQUISITION: This study was registered a priori in the PROSPERO database (CRD42018106567). Two independent reviewers carried out electronic searches in eight databases, without language or time frame limitations, to collate clinical studies comparing masticatory function of edentulous patients before versus after SIO installation with the implant placed on the mandibular midline. Risk of bias was assessed with a before-and-after tool and evidence certainty level was evaluated with the Grading of Recommendations Assessment, Development and Evaluation program. EVIDENCE SYNTHESIS: Eleven studies were included in this review (1 prospective, 3 crossover trials, 4 randomized clinical trials, 2 paired clinical trials, and 1 pilot). Enrolled patients were mostly over 60 years old; all patients were using conventional complete dentures (CD) prior to SIO installation. Masticatory performance, masticatory efficiency, bite force, and muscle activity were improved after the SIO placement compared to during mandibular CD use. Mandibular movement and masticatory ability data were inconclusive. Most of the studies had low risk of bias, but all had very low certainly level ratings due to methodological heterogeneity. CONCLUSIONS: Placement of SIO improves masticatory function, as reflected mostly by masticatory performance and efficiency data, relative to CD use. Further studies comparing dental rehabilitation options, including SIOs, are needed to improve the quality of evidence in the literature.


Asunto(s)
Implantes Dentales , Prótesis de Recubrimiento , Prótesis Dental de Soporte Implantado , Humanos , Mandíbula , Masticación , Persona de Mediana Edad , Satisfacción del Paciente , Estudios Prospectivos
12.
Prim Dent J ; 9(3): 29-33, 2020 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-32940588

RESUMEN

Whilst increasing numbers of older people retain natural teeth, a sizable proportion of older people are still edentate. Replacement of missing teeth is important for function, aesthetics and to facilitate social interactions. The process of providing oral rehabilitation for edentate older adults can be challenging, but clinicians can utilise a number of treatment options including removable or implant retained prostheses. In this article, complete denture construction will be described using both conventional and copy denture techniques. Recent innovations in the process for constructing complete dentures using computer aided design and manufacturing (CAD-CAM) techniques will also be discussed. Dental implants can be used to help retain removable complete prostheses for edentate patients and the use of implant-retained overdentures is presented as a treatment alternative.


Asunto(s)
Prótesis Dental de Soporte Implantado , Prótesis de Recubrimiento , Anciano , Anciano de 80 o más Años , Diseño Asistido por Computadora , Dentadura Completa , Humanos
13.
Evid Based Dent ; 21(3): 89, 2020 09.
Artículo en Inglés | MEDLINE | ID: mdl-32978535

RESUMEN

Data sources Data was collected utilising Medline (OVID interface), Google Scholar and Cochrane Library. Systematic reviews with/without meta-analysis were selected which included patient satisfaction and oral health-related quality of life as outcome measures. The literature search performed included systematic reviews with publication dates ranging from 1946 to 2018. PROSPERO was also used to incorporate systematic reviews that had been completed after the last search in August 2018.Study selection Studies were selected using the PICO model, selecting systematic reviews analysing adult edentulous patients with conventional complete dentures and/or implant-retained overdentures. The systematic reviews chosen assessed satisfaction and oral health-related quality of life, while comparing results to adult edentulous patients with no replacement teeth or prosthesis.Data extraction and synthesis All of the articles located from the database searches were uploaded to reference management software. Articles were screened independently by two authors to reduce bias and to assess the articles against the predetermined inclusion criteria. The EndNote filter Service was applied to avoid duplication of articles. Guidance from the Centre for Reviews and Dissemination (University of York) was incorporated to present data narratively, with text and tables. Eight reviews were included in data synthesis.Results Of the eight reviews included, six were systematic reviews without meta-analysis, one systematic review with meta-analysis was included and one was meta-analysis. Conclusions The results of this systematic review highlight the greater benefits of implant retained overdentures compared with conventional complete dentures when assessing patient satisfaction and oral health-related quality of life. The superiority of implant retained overdentures is most evident when patients cannot tolerate conventional complete dentures. However, consideration most be given to the adaptive capabilities of patients and the financial implications of implant-retained overdentures.


Asunto(s)
Implantes Dentales , Prótesis de Recubrimiento , Adulto , Prótesis Dental de Soporte Implantado , Dentadura Completa , Humanos , Salud Bucal , Satisfacción del Paciente , Satisfacción Personal , Atención Primaria de Salud , Calidad de Vida
14.
Int J Oral Maxillofac Implants ; 35(5): 982-989, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-32991649

RESUMEN

PURPOSE: This investigation aimed to evaluate clinical, prosthetic, and patient-based outcomes of a milled bar with polyether ether ketone (PEEK) and metal housings for inclined implants supporting mandibular overdentures. MATERIALS AND METHODS: Eighteen edentulous participants received four implants in the interforaminal area of the mandible (two vertically and two distally inclined), and implants were connected with milled bars. Overdentures were attached to the bars with PEEK female housing (test group). The control group consisted of participants who received milled bar overdentures with conventional metal housings but were case matched to the test group and served as a historical cohort. Clinical parameters (Plaque Index, Gingival Index, pocket depth, and bone loss) were measured at baseline, 6 months, and 12 months. Patient satisfaction (using visual analog scale) and prosthetic complications were recorded after 12 months. RESULTS: The control group showed a significantly higher plaque score and marginal bone resorption compared with the test group. The test group showed higher satisfaction with retention, stability, speech, and esthetics compared with the control group (P < .048). The test group showed a significantly lower incidence of female housing wear (P = .017), plastic clip wear (P < .001), and plastic clip fracture/renewal (P = .049) than the control group. No difference between groups was noted for other clinical, prosthetic, and patient-based outcomes. CONCLUSION: PEEK housing of a milled bar may be a successful alternative to conventional metal housing for inclined implants supporting mandibular overdentures, as it is associated with favorable clinical, prosthetic, and patient-based outcomes after 1 year.


Asunto(s)
Implantes Dentales/efectos adversos , Prótesis de Recubrimiento , Prótesis Dental de Soporte Implantado , Estética Dental , Éter , Éteres , Femenino , Humanos , Cetonas , Mandíbula/cirugía , Metales
15.
Niger J Clin Pract ; 23(8): 1178-1181, 2020 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-32788499

RESUMEN

Restoration of the malaligned dental implants in the esthetic zone is a challenge for dental practitioner because of the difficulty in obtaining balance and harmony between position and color of the final prosthesis and the adjacent teeth. Mesostructure is a part of the prosthesis that located ontop of the dental implant and bearing the final prosthesis. It has a form of milled bar to bear an overdenture or as abutment used for the correction of malaligned dental implants. Such approach maintains screw-retained prosthesis option while allowing complete retrievability, improved accessibility, usage of thicker abutment screws, and acceptable esthetic outcomes. In this case report, a two-piece mesostructure was designed to correct the malposition of dental implants in the esthetic zone with 1-year follow-up system.


Asunto(s)
Tornillos Óseos , Implantes Dentales , Diseño de Prótesis Dental , Estética Dental , Maxilar/cirugía , Anciano , Diseño de Prótesis Dental/métodos , Prótesis Dental de Soporte Implantado , Odontólogos , Prótesis de Recubrimiento , Femenino , Humanos , Rol Profesional , Resultado del Tratamiento
16.
Indian J Dent Res ; 31(3): 414-419, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-32769276

RESUMEN

Objectives: To evaluate the impact of implants number and attachments type on the peri-implant stresses and retention of maxillary palateless implant-supported overdenture. Materials and Methods: Four edentulous maxillary educational acrylic resin models were used. According to the implants number and type of attachment used, four groups were compared: Group I, 2-locator attachments in the canine area; Group II, 2- OT equator attachments in the canine area; Group III, 4-locator attachments in the canine, second premolar area and Group IV, 4-OT equator attachments in the canine, second premolar area. Implants retained palateless overdenture was constructed on each model. Four self-protected linear strain gauges were cemented on each implant. A digital loading device was used to apply compressive loads to measure the resulting peri-implant stresses. Forcemeter and Universal testing machines were used to test the retention of palateless overdenture. Results: A significant difference between the same implant number and distribution with different attachments was found (P = 0.003, P = 0.020), respectively. Least stresses amount was found around the 4-implant locator palateless overdenture, while the highest was found around the 2-implant OT equator palateless overdenture. Nevertheless; the result was that 2-implant locator palateless overdenture recorded insignificant higher retentive forces than the 4-implant OT equator one. Conclusions: It can be concluded that the implant-retained palateless overdenture with four locator attachments is considered a promising treatment option regarding stress distribution. Using locator attachments, for implant-retained palateless overdenture with either two or four implants considering their superior retentive properties, is advantageous when compared to OT equator attachments.


Asunto(s)
Implantes Dentales , Prótesis de Recubrimiento , Prótesis Dental de Soporte Implantado , Análisis del Estrés Dental , Retención de Dentadura , Maxilar
17.
J Oral Sci ; 62(4): 397-401, 2020 Sep 26.
Artículo en Inglés | MEDLINE | ID: mdl-32848099

RESUMEN

The aim of this study was to compare the clinical outcomes of implant-supported overdentures (ODs) with either bar-clip or ball attachments. The implant, prosthesis failure, and technical complications were the outcomes analyzed in this retrospective clinical study conducted in a specialty clinic. Seventy-five patients with 242 implants supported by 76 ODs (36 maxillary, 40 mandibular) were included in the study and followed up for 88.8 ± 82.9 months (mean ± standard deviation). Bar-clip and ball attachments were used in 78.9% and 21.1% of the cases, respectively. Forty-three implant failures (17.8%) in 17 prostheses (17/76; 22.4%) were observed in this study. The average period of implant failure was 43.3 ± 41.0 months, and most of them were maxillary turned implants. The bar-clip system demonstrated more complications in the attachment parts compared to the ball attachment system. Poor retention of the prosthesis was similar between the two systems. Loss of implants resulted in the failure of 10 ODs in this study. ODs opposed by natural dentition or fixed prostheses presented with more complications. The Cox proportional hazards model did not show a significant effect on prosthesis failure for any of the factors. These findings indicated that patients with ODs need constant maintenance follow-ups to address the technical complications and perform prosthodontic maintenance regardless of the attachment system used.


Asunto(s)
Implantes Dentales , Prótesis de Recubrimiento , Prótesis Dental de Soporte Implantado , Retención de Dentadura , Humanos , Mandíbula , Estudios Retrospectivos , Instrumentos Quirúrgicos
18.
Av. odontoestomatol ; 36(2): 81-88, mayo-ago. 2020. ilus, tab
Artículo en Español | IBECS | ID: ibc-194689

RESUMEN

INTRODUCCIÓN: La implantología oral puede constituir una modalidad terapéutica en el tratamiento prostodóncico de los pacientes con compromiso médico. El estudio muestra la evaluación del tratamiento con implantes en pacientes con diabetes comparados con pacientes sin diabetes. MÉTODOS: 48 pacientes edéntulos totales (24 pacientes diabéticos y 24 no diabéticos) fueron tratados con 96 implantes con superficie arenada y grabada Galimplant ® en la mandíbula para su rehabilitación prostodóncica con sobredentaduras mandibulares. 2 implantes fueron insertados en cada paciente. Los implantes fueron cargados funcionalmente tras un periodo de tiempo de 6 semanas con retenedores de fricción. Los hallazgos clínicos (implantológicos y prostodóncicos) se han seguido durante 7 años. RESULTADOS: Los resultados indican una supervivencia de los implantes del 95,8%. Durante el periodo de seguimeinto clínico se perdieron 4 implantes (dos implantes en cada grupo). La pérdida de hueso marginal media fué de 0,7 mm en ambos grupos. El 100% de los pacientes fueron tratados mediante una sobredentadura implantorretenida con anclajes de fricción. En 14 pacientes se realizaron cambios en los componentes plásticos de los ataches. El seguimiento clínico medio fue de 82,5 meses (60-102 meses). CONCLUSIONES: Los resultados del presente estudio indican que el tratamiento con implantes dentales en pacientes diabéticos es una terapéutica exitosa sin diferencias entre los pacientes diabéticos y no diabéticos


INTRODUCTION: Implant dentistry can to constitute a therapeutic modality in the prosthodontic treatment of medically compromised patients. This study reports the evaluation of treatment with implants in patients with diabetes compared with patients without diabetes. METHODS: 48 edentulous patients (24 diabetic patients and 24 non-diabetic patients) were treated with 96 Galimplant ® sand-blasted and acid-etched surface implants for prosthodontic rehabilitation with mandibular overdentures. Two implants were inserted in each patient. Implants were loaded after a healing free-loading period between 6 weeks with locator attaches. Clinical findings (implant and prosthodontics) were followed during at 7 years. RESULTS: Clinical results indicate a survival rate of implants of 95.8% in both groups. Four implant was lost during the follow-up period (two implants in each group). Media marginal bone loss was 0.7 mm in both groups. 100% of patients were treated with overdentures retained with 2 implants with locator attaches. Changes in plastic components of attaches were reported in 14 patients. The media follow-up was of 82.5 months (60-102 months). CONCLUSIONS: Clinical results of this study indicate that treatment with dental implants in diabetic patients is a successful implant treatment without differences with nondiabetic patients


Asunto(s)
Humanos , Masculino , Femenino , Persona de Mediana Edad , Anciano , Anciano de 80 o más Años , Implantes Dentales , Arcada Edéntula/cirugía , Diabetes Mellitus , Prótesis de Recubrimiento , Prostodoncia/métodos , Tomografía Computarizada por Rayos X/métodos , Profilaxis Antibiótica/métodos , Clorhexidina/uso terapéutico , Tejido Periapical/diagnóstico por imagen , Tejido Periapical/patología , Análisis de Varianza
19.
Clin Oral Implants Res ; 31(10): 968-979, 2020 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-32716589

RESUMEN

OBJECTIVES: The concept of platform switching is widely applied in current implant dentistry; however, the influence on peri-implant bone-level alterations (ΔIBL), especially in the field of implant overdentures (IODs), remains inconclusive. Therefore, the present study aimed to test the alternative hypothesis that there is an equivalent ΔIBLs at platform-switching and platform-matching implant abutments in 2-implant bar-retained IODs. MATERIALS AND METHODS: Two interforaminal implants were placed in 32 subjects, who were randomly assigned to either an immediate- or a 3-month post-placement loading group. Furthermore, one implant in each subject was randomly assigned to receive a platform-switched abutment (test), and one a platform-matching abutment (control). The implants were splinted with prefabricated, chairside customized bars. ΔIBL was recorded by using customized radiograph holders at implant placement, implant loading, 3 months, 6 months, and 12 months after loading. RESULTS: After 1 year, equivalent ΔIBL could be identified (test: -0.51 mm ± 0.49 versus control: -0.56 mm ± 0.52; p < .001). ΔIBL increased over time and was more pronounced in the delayed-loaded implants (-0.87 mm ± 0.61) relative to the immediately loaded implants (-0.35 mm ± 0.43; p = .022). CONCLUSIONS: The prosthetic concept of platform switching does not necessarily lead to reduced bone loss. Immediate-loading of implants, primarily splinted with a bar, might be beneficial regarding peri-implant bone-level alterations over a short-term period.


Asunto(s)
Pérdida de Hueso Alveolar , Implantes Dentales , Carga Inmediata del Implante Dental , Implantación Dental Endoósea , Prótesis Dental de Soporte Implantado , Prótesis de Recubrimiento , Mandíbula/cirugía , Boca , Resultado del Tratamiento
20.
Quintessence Int ; 51(9): 722-731, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-32696032

RESUMEN

OBJECTIVE: To investigate bone loss in the anterior edentulous maxilla restored with maxillary complete dentures and opposed by mandibular two-implant-supported overdentures (2-IODs) or complete dentures. METHOD AND MATERIALS: A systematic search was conducted using the Ovid MEDLINE, Embase, Web of Science, CINAHL, and Cochrane databases for studies investigating bone loss in the anterior edentulous maxilla with mandibular 2-IODs or complete dentures. Two reviewers assessed the eligibility of studies and risk of bias assessment was conducted according to the Newcastle-Ottawa Scale. A meta-analysis was performed using statistical software to estimate weighted mean difference in bone loss with 95% confidence interval (CI). The level of significance was defined as P value (< .05). RESULTS: A total of 2,510 studies were identified through electronic and manual searching. Six studies were selected and compounded for quantitative synthesis of 163 patients. Bone loss in the anterior edentulous maxilla was greater with 2-IODs than with complete dentures. The total estimate of weighted mean difference between 2-IODs and complete dentures was -1.40 (95% CI -3.12 to 0.31). However, the difference was not statistically significant (P = .11). The data were heterogenous across the studies based on chi-square statistics (χ2 [df = 7] = 52.75, P < .0001; τ2 = 5.53, I2 = 95.21%). In addition, the impact of implant splinting on bone loss was not significant (P > .29). None of the included studies were considered to be at high risk of bias. CONCLUSION: Within the limitations of the current systematic review and meta-analysis, the estimate of bone loss in the anterior edentulous maxilla was greater with 2-IODs than with complete dentures. However, the difference was not statistically significant. A well-designed randomized clinical study needs to be conducted to validate the results of this systematic review.


Asunto(s)
Prótesis de Recubrimiento , Arcada Edéntula , Prótesis Dental de Soporte Implantado , Dentadura Completa , Humanos , Mandíbula , Maxilar
SELECCIÓN DE REFERENCIAS
DETALLE DE LA BÚSQUEDA