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1.
Artículo en Inglés | MEDLINE | ID: mdl-33572988

RESUMEN

Background: Implant dentistry has evolved over time, resulting in better treatment outcomes for both patients and clinicians. The aim of this trial was to test whether the immediate loading of implants with a platform-switching design influences the marginal bone level, compared to four-week loading, after one year of follow-up. Moreover, a comparison of clinical data regarding implant survival, implant stability, and patient-reported outcome measures (PROMs) was conducted. Methods: Klockner® VEGA® implants with a ContacTi® surface were placed in partially edentulous patients in the posterior areas. Group A received an immediately loaded prosthesis (one week) and Group B received an early-loaded prosthesis (four weeks). All abutments were placed at the time of surgery. Radiographic and clinical data were recorded. Results: Twenty-one patients were treated (35 implants). No implants were lost during the study. The final marginal bone level did not show differences between groups. The bone loss at 12 months at the implant level was 0.00 mm for both groups (median). The final implant quotient stability (ISQ) values did not differ between groups (median 73 and 70.25), nor did the other clinical parameters or PROMs. Conclusions: The results suggest that neither of the loading protocols with the implants used influenced the marginal bone level-not the osseointegration rate, clinical conditions, or PROMs.


Asunto(s)
Pérdida de Hueso Alveolar , Pérdida de Hueso Alveolar/diagnóstico por imagen , Fracaso de la Restauración Dental , Dentadura Parcial Fija , Estudios de Seguimiento , Humanos , Oseointegración , Prótesis e Implantes , Resultado del Tratamiento
2.
Niger J Clin Pract ; 24(2): 220-224, 2021 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-33605912

RESUMEN

Objective: The objective was to in-vitro evaluate the mode of failure of abutments supporting fixed partial dentures (FPDs) via different retention techniques. Materials and Methods: Thirty-six implants with diameter and length of 4.5 and 13 mm, respectively, were used to prepare 18 samples of FPDs. Based on the variations on abutment's design, the FPDs were divided into three groups: Group A is cement-based retention; Group B is screw-based retention; and Group C is multiunit screw-based retention. Using a chewing simulator, cyclic loads of 1,250,000 load cycles with the load of 70N were applied on all samples to simulate 5 years of human functional chewing. The samples were loaded until failure using an electromechanical test machine. Sample-size estimation was done and fracture-load values were recorded as means and corresponding standard deviations; and group comparisons were done using one-way analysis of variance and Tukey's post hoc tests. A P value below 0.01 was nominated as an indicator of statistical significance. Results: In total, 36 samples (12 implant-abutment connections per group) were assessed. Abutment bending was observed in 6 (50%), 6 (50%) and 6 (50%) samples in groups A, B and C, respectively. De-attachment of the FPD form the abutment occurred in 5 (41.7%) and 5 (41.7%) samples in groups A and C, respectively. Screw fracture and fracture of FPD at the connector side occurred in 1 (8.3%) and 1 (8.3%) sample in groups A and C, correspondingly. Failure of the FPD was more often encountered in groups A (100%) and C (100%), compared to group B (50%). Conclusion: All abutments underwent failures under cyclic loading with abutment bending being the most common failure mode. Cement- and multi-screw-supported abutments fail more often than screw-supported abutments.


Asunto(s)
Dentadura Parcial Fija , Diente , Pilares Dentales , Prótesis Dental de Soporte Implantado , Fracaso de la Restauración Dental , Análisis del Estrés Dental , Humanos , Masticación , Ensayo de Materiales
3.
Int J Prosthodont ; 34(1): 37-46, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-33570518

RESUMEN

PURPOSE: To evaluate the 2-year performance of definitive implant- or tooth-supported three-unit fixed dental prostheses made of zirconia-reinforced lithium silicate placed to restore premolars and molars in clinical cases of partial edentulism. MATERIALS AND METHODS: All patients received a three-unit fixed restoration made of monolithic, hot-pressed, zirconia-reinforced lithium silicate glass-ceramic. The restoration was cemented to two natural teeth or attached to two 3.5- or 4.5-mm-diameter square threaded, grit-blasted, acid-etched integrated implants with a Morse taper connection. Peri-implant pocket depth and bone and soft tissue remodeling were recorded for 2 years at each follow-up visit. Esthetic, functional, and biologic United States Public Health Services (USPHS) parameters modified by the World Dental Federation study design were assessed yearly until the final follow-up appointment. At the time of placement of the definitive restorations and at the 2-year follow-up visit, the opposing dentitions were identified by type of restoration and supporting structures. RESULTS: A total of 100 patients were consecutively enrolled in the period between June 2016 and July 2017, and 50 patients each received an implant-supported restoration (Group A) or a tooth-supported restoration (Group B). One (2%) of the 50 implant-supported prostheses fractured after 21 months of function. None of the other prostheses failed or became loose or detached. No significant differences involving probing levels or bone and soft tissue remodeling were found between the follow-up times. No cases of inflammation or infection of the mucosal cuff around the neck of the implants were recorded. The most common issue occurred immediately after placement of the prosthesis, when 3 patients (6%) from Group A and 4 patients (8%) from Group B asked for a modification of tooth shade. CONCLUSION: Implant-supported or tooth-supported three-unit fixed dental prostheses made of zirconia-reinforced lithium silicate can be used to successfully restore cases of posterior partial edentulism. The 2-year results of this report will be studied more in depth in ongoing long-term research.


Asunto(s)
Implantes Dentales , Litio , Diseño de Prótesis Dental , Prótesis Dental de Soporte Implantado , Fracaso de la Restauración Dental , Dentadura Parcial Fija , Estudios de Seguimiento , Humanos , Silicatos , Circonio
4.
Stomatologiia (Mosk) ; 100(1): 52-54, 2021.
Artículo en Ruso | MEDLINE | ID: mdl-33528956

RESUMEN

THE AIM OF THE STUDY: Was to assess the hemodynamics in the pulp of supporting teeth before and after their preparation for ceramic and metal-ceramic crowns. MATERIALS AND METHODS: The study comprised 40 patients treated with ceramic and metal-ceramic fixed dentures. Pulp hemodynamics was assessed by bipolar reodentography 1, 5, 10 and 20 days after the preparation. RESULTS: At 10 days after dental preparation visual examination of the reodentogram configurations showed their approximation to the original data, which indicates the possibility of using vital teeth as supports for fixed dentures when following the rules of their preparation. CONCLUSION: Supporting teeth vitality in cases of their preparation for ceramic and metal-ceramic crowns may be maintained by the strict adhesion to preparation protocol.


Asunto(s)
Coronas , Aleaciones de Cerámica y Metal , Cerámica , Porcelana Dental , Pulpa Dental , Dentadura Parcial Fija , Dentaduras , Humanos
5.
Int J Oral Maxillofac Implants ; 36(1): 55-58, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-33600523

RESUMEN

PURPOSE: The purpose of this in vitro study was to evaluate the load-to-fracture values of cement-, screw-, and multiscrew-retained abutments for implant-supported fixed partial dentures (FPDs). MATERIALS AND METHODS: Thirty-six implants with a diameter and length of 4.5 and 13 mm, respectively, were used to prepare 18 samples of FPDs. Based upon the variations on abutment design, the FPDs were divided into three categories as follows: cement-retained, screw-retained, and multiunit screw-retained abutments. Using a chewing simulator, cyclic loads of 1,250,000 load cycles with a load of 70 N were applied on all samples to simulate 5 years of human functional chewing. The samples were loaded until failure using an electromechanical test machine. Sample-size estimation was done, and fracture-load values were recorded as means and corresponding standard deviations; group comparisons were done using one-way analysis of variance and Tukey post hoc tests. A P value < .01 was considered as an indicator of statistical significance. RESULTS: The fracture-load values for cement-, screw-, and multiunit screw-retained abutments were 2,109.2 ± 139.6 N, 3,888.8 ± 70 N, and 3,319.4 ± 218.9 N, respectively. The load-to-fracture values were significantly higher in screw-retained abutments (3,888.8 ± 70 N; P < .001) than in cement-retained (2,109.2 ± 139.6 N) and multiunit screw-retained abutments (3,319.4 ± 218.9 N). CONCLUSION: Screw-retained implant-supported FPDs withstand higher occlusal forces compared with cement- and multiunit screw-based retention techniques. However, the results should be cautiously interpreted, as they were based on a relatively small sample size.


Asunto(s)
Implantes Dentales , Fracaso de la Restauración Dental , Tornillos Óseos , Pilares Dentales , Prótesis Dental de Soporte Implantado , Análisis del Estrés Dental , Dentadura Parcial Fija , Humanos , Ensayo de Materiales
6.
Quintessence Int ; 0(0): 292-298, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-33491389

RESUMEN

Objectives: Recent data show that teeth prepared with horizontal finishing lines supporting crowns and fixed partial dentures present more periodontal disorders than untreated control teeth. Several studies have shown that NitrAdine (bonyf) induces a significant reduction of dental biofilm. The aim of this study was to demonstrate that 10-day use of PerioTabs (bonyf), a NitrAdine-based gingiva brushing solution, is effective in treating gingival inflammation of prosthodontic patients. Method and materials: Forty-nine subjects were instructed to brush their teeth, gingivae, and prostheses with the PerioTabs solution for 10 days (treatment group) and 49 with any toothpaste (control group). The initial and 11-day Plaque Index and Bleeding Index were recorded. A five-point Likert scale was used to evaluate the level of patient satisfaction. The Shapiro-Wilk statistical test was used to compare the results for the two groups. Results: Highly significant differences between the treatment and control group (P < .001) for the Plaque Index and Bleeding Index resulted. The treatment group patients' satisfaction was high: 31 (63.3%) reported the highest level, 5, on the Likert scale, and 18 (36.7%) declared they were satisfied (level 4). Conclusions: The use of a NitrAdine-based gingiva brushing solution (PerioTabs) was effective in reducing the gingival inflammation in periodontally affected patients treated with fixed partial dentures. Clinical relevance: The NitrAdine-based gingiva brushing solution (PerioTabs) was highly accepted by the patients and seems to be a promising alternative to the solutions widely used.


Asunto(s)
Encía , Gingivitis , Índice de Placa Dental , Dentadura Parcial Fija , Humanos , Cepillado Dental
7.
Evid Based Dent ; 21(4): 138-139, 2020 12.
Artículo en Inglés | MEDLINE | ID: mdl-33339976

RESUMEN

Source of funding This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectorsType of study/design Randomised controlled trial (RCT) with parallel design.Subjects This RCT was conducted at the Clinic of Fixed and Removable Prosthodontics and Dental Material Science, Centre of Dental Medicine, University of Zurich, Zurich, Switzerland. Ten patients, six women and four men, with a mean age of 62 years and an age range of 49-77 years, requiring posterior tooth-supported 3-unit fixed partial dentures (FPDs) were included in this RCT. The abutment teeth were six molars and six premolars in the maxilla and five molars and three premolars in the mandible. The patients fulfilled the following inclusion criteria: they all were >18 years, with a full mouth plaque score <25% and a full mouth bleeding score <25%. They all needed a posterior tooth-supported FPD, in which the third molar was not an abutment tooth. Only abutments with no extensive pretreatment were eligible. Adjacent and opposing teeth should be healthy or adequately restored.Treatment Three intraoral digital scanning systems (Lava C.O.S.; 3M [Lava], iTero; Align Technology Inc [iTero], Cerec Bluecam; Dentsply Sirona [Cerec]) and conventional light/regular body polyether impression in a stock tray were made on each of the included participants by the same clinician. The opposing arch impression was made in alginate. The sequence of the four techniques was computer generated and concealed in opaque sealed envelopes. Three calibrated experienced clinicians were involved in the treatment. They followed the published guidelines for preparing abutments that receive CAD/CAM ceramic FPDs. After interim prosthesis removal and double retraction cord application, the digital or the conventional impression procedure was started as dictated by the random sequence. Scans were done according to the manufacturer's guidelines, whereby Lava and Cerec required powdering of the teeth by titanium oxide and iTero did not.Main outcome Time needed for obtaining a scan or an impression was calculated. For digital scans it consisted of the time required for powdering, scanning and occlusal registration, while in conventional impression it started from the beginning of impression mixing till tray removal. The number of impression or scan remakes required until results fulfilling the quality criteria were obtained was also recorded. Visual analogue scale (VAS) was used to rate the perception of both, clinicians and patients for the procedures. Patients were asked to rate their comfort with the procedure, while clinicians rated both difficulty and comfort, where 0 indicated uncomfortable and simple and 100 difficult and comfortable. Subjective assessment of the time as judged by the clinicians and the patients was also reported.Main results Generally speaking, conventional impression was better than the three complete arch digital scans, regarding time required in seconds, difficulty for clinicians, comfort and time perception of both patients and clinicians. Number of remakes were highest in iTero (7), followed by Lava, conventional impression and finally Cerec (0). The time required for each technique differed significantly Polyether = 658 (95%CI 528-782) Cerec = 1776 (95%CI 804-2386) iTero = 1107 (785 - 2091). A significant difference was found neither among the three digital impressions, nor between the conventional impression and Lava (µ = 1091, 95%CI [717-1465]). The same findings were reported regarding difficulty for the clinicians. A significant difference was reported between conventional impression (µ = 15, 95%CI [7-24]) and both Cerec (µ = 67, 95%CI [58-77]) and iTero (µ = 43, 95%CI [25-62]). No significant difference was reported among the studied techniques regarding patients' comfort and time perceptions of both clinicians and patients except for a difference in the patients' time perception of Cerec and conventional impression, where P = .035. Regarding the clinicians' comfort a significant difference was only found between conventional impression (µ = 82, 95%CI [69-94]) and Cerec (µ = 32, 95%CI [18-46]).Conclusion Within the limitations of this RCT, it can be concluded that complete arch conventional impression is objectively less time consuming and subjectively preferred by both clinicians and patients when compared to digital scanning. Digital scanning techniques, requiring powdering, are more difficult for the clinicians than powderless ones and conventional impression.


Asunto(s)
Materiales de Impresión Dental , Técnica de Impresión Dental , Anciano , Cerámica , Dentadura Parcial Fija , Femenino , Humanos , Masculino , Persona de Mediana Edad , Suiza , Flujo de Trabajo , Circonio
8.
Rev. Asoc. Odontol. Argent ; 108(3): 129-137, dic. 2020. ilus, tab
Artículo en Español | LILACS | ID: biblio-1147924

RESUMEN

Objetivo: Presentar el uso de la cirugía guiada para la resolución quirúrgico-protética de un caso clínico con colocación de implantes de longitud estándar (>7 mm) en un maxilar inferior atrófico, sin regeneración ósea guiada. Caso clínico: Una paciente que requería terapia con implantes en sectores posteroinferiores se presentó en la Cátedra de Odontología Integral Adultos de la Facultad de Odontología de la Universidad de Buenos Aires. Primero se realizó una tomografía computarizada de haz cónico del maxilar inferior para evaluar la disponibilidad ósea. La planificación se efectuó siguiendo un protocolo digital a fin de optimizar la selección de los implantes y su instalación en función de la futura rehabilitación protética y el tejido óseo disponible. Después se escanearon ambos maxilares y el registro intermaxilar; estas imágenes ­junto con las correspondientes a la tomografía (DICOM)­ fueron importadas como archivos (STL) a un software específico de diseño para determinar digitalmente la posición 3D ideal de los implantes y diseñar una guía quirúrgica de precisión. Luego se realizó la cirugía de instalación de los implantes con la guía quirúrgica, y finalmente los implantes fueron rehabilitados por medio de coronas cemento-atornilladas. Conclusión: El uso de la cirugía guiada permitió optimizar el tejido óseo disponible para la instalación de implantes en función de la futura rehabilitación protética (AU)


Aim: To present the use of guided surgery for the prosthetic resolution of a clinical case with placement of implants of standard length (>7 mm) in an atrophic posterior mandible, with no need of bone regeneration. Clinical case: A patient who required implants in the posterior sectors of the mandible attended to the department of Odontología Integral Adultos, Facultad de Odontología, Universidad de Buenos Aires, Argentina. A dental cone beam computed tomography (CBCT scan) of the lower jaw was done to assess bone availability and was decided to perform guided surgery for accurate implant placement. Both maxillaries and intermaxillary occlusal registration were scanned and imported into files (STL) together with those of the CBCT scan (DICOM) into specific design software. Following the digital protocol using a surgical guide the implants were placed and then restored with cemented-screwed crowns. Conclusion: Guided surgery allowed planning implant placement, guided by the final position of the prosthetic restoration, and optimizing the available bone (AU)


Asunto(s)
Humanos , Femenino , Anciano , Pérdida de Hueso Alveolar/cirugía , Cirugía Asistida por Computador , Implantación Dental Endoósea , Mandíbula , Argentina , Facultades de Odontología , Regeneración Ósea , Dentadura Parcial Fija , Tomografía Computarizada de Haz Cónico , Rehabilitación Bucal
9.
Int J Prosthodont ; 33(5): 503-512, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-32956431

RESUMEN

PURPOSE: To assess the clinical outcomes of single-retainer resin-bonded fixed dental prostheses (RBFDPs) and the profilometric changes of pontic sites after a mean of 10 years in function. MATERIALS AND METHODS: Ten patients (mean age 32.4 years) who had received an RBFDP replacing a single anterior tooth were recalled after 10 years. Five patients had received a subepithelial connective tissue graft (SCTG) at the pontic site. The clinical assessment comprised the following parameters: probing depth, bleeding on probing, modified plaque control record, gingival recession, measurement of the width of keratinized mucosa, and intraoral photographs and radiographs. The modified criteria of the United States Public Health Services evaluation system were applied. Additionally, patient satisfaction was recorded. Data were analyzed descriptively, and the 10-year RBFDP survival rates were calculated using Kaplan-Meier analysis. RESULTS: The RBFDP survival rate after a mean follow-up of 10.0 years (range 7.4 to 13.3 years) was 100%. Neither technical failures nor biologic complications were observed. All abutment teeth remained vital, and no secondary caries were detected. Between baseline and follow-up examinations, the profilometric changes at the pontic sites were minimal, exhibiting a loss of -0.03 ± 0.10 mm (no SCTG) and 0.00 ± 0.37 mm (SCTG). CONCLUSION: The present study exhibited high survival rates and low complication rates of the restorations, as well as excellent profilometric stability of the pontic sites over 10 years. The use of an RBFDP is a viable long-term treatment option for replacing a single anterior tooth.


Asunto(s)
Cerámica , Circonio , Adulto , Fracaso de la Restauración Dental , Dentadura Parcial Fija , Humanos , Tasa de Supervivencia
10.
Int J Comput Dent ; 23(3): 293-301, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-32789316

RESUMEN

AIM: The aim of this case report is to present the minimally invasive replacement of a missing molar in the presence of considerable proximal undercuts of the adjacent abutment teeth. The use of two single-retainer resin-bonded fixed dental prostheses (RBFDPs) made this therapy possible. MATERIALS AND METHODS: A missing mandibular right first molar required replacement. Two single-retainer RBFDPs were digitally designed in the shape of half a molar each and were milled using CAD/CAM from monolithic 3Y-TZP zirconia ceramic. The posterior RBFDP portion retained by the second molar was designed in the pontic contact area to create a common path of insertion for the anterior RBFDP portion with the distal surface of the second premolar. A slight interlocking between the proximal contact surfaces of the two pontics was designed to prevent future migration between the split restorations. Precise placement of the two RBFDPs during adhesive luting was ensured with the aid of a positioning splint. RESULTS: The patient was recalled after 10 months and was very satisfied with the minimally invasive molar replacement. CONCLUSION: Using two single-retainer RBFDPs to replace a molar in a split design enables a minimally invasive posterior tooth replacement despite considerable proximal undercuts of the adjacent abutment teeth.


Asunto(s)
Recubrimiento Dental Adhesivo , Dentadura Parcial Fija con Resina Consolidada , Dentadura Parcial Fija , Humanos , Diente Molar , Cementos de Resina
11.
J Hist Dent ; 68(2): 68-70, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-32852268

RESUMEN

Historically, many teeth that had been traumatized resulted in extractions and replacements with a fixed partial denture (bridge). However, in rare situations some clinicians provided creative approaches to tooth retention much like what is done today, 125 years later.


Asunto(s)
Fracturas de los Dientes , Coronas , Dentadura Parcial Fija , Historia del Siglo XIX , Humanos , Fracturas de los Dientes/historia , Fracturas de los Dientes/terapia
13.
Artículo en Inglés | MEDLINE | ID: mdl-32549291

RESUMEN

The aim of this study was to compare the quality of different computer-assisted-design and computer assisted manufacturing systems (CAD-CAM) generated by only one scanner, focusing on vertical fit discrepancies and the mechanical properties. A master model was obtained from a real clinical situation: the replacement of an absent (pontic) tooth, with the construction of a fixed partial denture on natural abutments with three elements. Nine scans were performed by each tested and 36 copies were designed using a dental CAD-CAM software (Exocad). The frameworks were manufactured using three-axis and five-axis, with the same batch of the chrome-cobalt (CrCo) alloy. The frameworks were not cemented. A focus ion beam-high resolution scanning electron microscope (FIB-HRSEM) allowed us to obtain the vertical gap measurements in five points for each specimen. Roughness parameters were measured using white light interferometry (WLI). The samples were mechanically characterized by means of flexural tests. A servo-hydraulic testing machine was used with a cross-head rate of 1 mm/min. One-way ANOVA statistical analysis was performed to determine whether the vertical discrepancies and mechanical properties were significantly different between each group (significance level p < 0.05). The overall mean marginal gap values ranged: from 92.38 ± 19.24 µm to 19.46 ± 10.20 µm, for the samples produced by three-axis and five-axis machines, respectively. Roughness was lower in the five-axis machine than the three-axis one, and as a consequence, the surface quality was better when the five-axis machine was used. These results revealed a statistically significant difference (p < 0.005) in the mean marginal gap between the CAD-CAM systems studied. The flexural strength for these restorations range from 6500 to 7000 N, and does not present any statistical differences' significance between two CAD-CAM systems studied. This contribution suggests that the number of axes improves vertical fit and surface quality due to the lower roughness. These claims show some discrepancies with other studies.


Asunto(s)
Diseño Asistido por Computadora , Diseño de Dentadura , Dentadura Parcial Fija , Ensayo de Materiales , Propiedades de Superficie , Circonio
14.
Int J Periodontics Restorative Dent ; 40(4): e157-e162, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-32559040

RESUMEN

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.


Asunto(s)
Implantes Dentales , Carga Inmediata del Implante Dental , Arcada Edéntula/cirugía , Implantación Dental Endoósea , Prótesis Dental de Soporte Implantado , Fracaso de la Restauración Dental , Dentadura Parcial Fija , Estudios Prospectivos
15.
Rev. ADM ; 77(3): 168-171, mayo-jun. 2020. ilus
Artículo en Español | LILACS | ID: biblio-1128903

RESUMEN

El póntico E es una alternativa de tratamiento para la pérdida prematura dental, este tipo de póntico fue publicado por primera vez en 2014 por Robert P. Korman. El diseño del póntico permite ofrecer predictibilidad en cuanto a soporte y mantenimiento de la arquitectura gingival, también promueve que el tejido vestibular migre coronalmente sobre el póntico, creando un surco gingival. Se recibió a una paciente que presentaba fragmento radicular del diente 21 y ausencia del diente 12, reborde residual atrófico (clase I según Seibert). Como plan de tratamiento, se realizó la extracción atraumática del fragmento radicular del diente 21 para retardar el colapso del reborde alveolar y se colocó injerto de tejido conectivo en la zona del diente 12 para corregir el defecto clase I de Seibert, se realizó la conformación de los nichos gingivales con electrobisturí en conjunto con la prótesis provisional y la preparación de los dientes pilares para la recepción y rehabilitación con pónticos E. Se colocó una prótesis fija de cinco unidades (dientes 13 al 23) en material núcleo de Zr y estratificada con cerámica (AU)


Pontic E is an alternative treatment for premature dental loss, this type of pontic was published for the first time in 2014 by Robert P. Korman. The design of the pontic allows to offer predictability in terms of support and maintenance of the gingival architecture, it also promotes that the vestibular tissue migrates coronally over the pontic, creating a gingival groove. A patient was received who presented a radicular fragment of tooth 21 and absence of tooth 12, atrophic residual ridge (class I according to Seibert). As a treatment plan, atraumatic extraction of the root fragment of tooth 21 was performed to delay the collapse of the alveolar ridge and connective tissue graft was placed in the area of tooth 12 to correct Seibert's class I defect, conformation was performed of the gingival niches with electrocautery in conjunction with the provisional prosthesis and the preparation of the abutment teeth for the reception and rehabilitation with pontics E. A fixed prosthesis of five units was placed (teeth from 13 to 23) of Zr core material and stratified with ceramic (AU)


Asunto(s)
Humanos , Femenino , Adulto , Dentadura Parcial Fija , Estética Dental , Aumento de la Cresta Alveolar , Planificación de Atención al Paciente , Extracción Dental , Cerámica , Tejido Conectivo/trasplante , Electrocirugia , México
16.
Georgian Med News ; (300): 32-37, 2020 Mar.
Artículo en Ruso | MEDLINE | ID: mdl-32383698

RESUMEN

The object of the paper is a clinical assessment of the resin-bonded fixed partial dentures (RBFPD) produced by the indirect method of dental composite resin materials with various reinforcement, in patients with I degree high teeth abrasion. 80 persons with I degree high teeth abrasion and small defects in the lateral part of dental arch with a length of not more than one tooth were examined. For patients of I group, 40 RBFPDs were made of nano dental composite resin and three glass fiber tapes laid horizontally; for patients of II group, 40 RBFPDs made of hardened nano dental composite resin were reinforced with the same tapes laid by the developed method. In 12 months, fractures and fixation disorders of 9 dentures were found in patients from I group (22.5% of the initial quantity), and patients of II group had fixation disorders in 2 dentures (5.0%), and 7 (17.5%) and 32 dentures (80.0%), respectively, had no significant and insignificant disorders. In 24 months, the patients of I group had fractures and fixation disorders of another 7 dentures (22.6% of the number of RBFPDs at a given time), and patients from II group had such disorders in 3 RBFPDs (7.9%), while 3 dentures (7.5% of the initial amount) and 22 RBFPDs (55.0%), respectively, had no disorders. In order to restore the dental integrity with small bounded edentulous teeth in patients with I degree high teeth abrasion, it is possible to use RBFPDs indirect production of which requires the application of hardened nano dental composite resin with reinforcement by means of three glass fiber tapes according to the developed method, which ensures restoration efficiency within 12 and 24 months at the level of 80.0% and 55.0%.


Asunto(s)
Dentadura Parcial Fija con Resina Consolidada , Fracaso de la Restauración Dental , Diseño de Dentadura , Dentadura Parcial Fija , Humanos
17.
Swiss Dent J ; 130(5): 397-406, 2020 May 11.
Artículo en Alemán | MEDLINE | ID: mdl-32390410

RESUMEN

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.


Asunto(s)
Estética Dental , Incisivo , Dentadura Parcial Fija , Humanos
18.
Indian J Dent Res ; 31(2): 323-325, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-32436917

RESUMEN

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).


Asunto(s)
Dentadura Parcial Removible , Resinas Acrílicas , Dentadura Completa , Dentadura Parcial Fija , Femenino , Humanos , India , Masculino
19.
J Esthet Restor Dent ; 32(5): 444-450, 2020 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-32442351

RESUMEN

OBJECTIVE: Ceramic fracture is an undesirable outcome of the rehabilitation with fixed partial dentures (FPD), mainly because it may involve additional cost and clinical time for intraoral repair or replacement of the restoration. This clinical report describes a 5 years survival intraoral repair of a chipped porcelain veneered zirconia framework restoration using a resin-based composite. CLINICAL CONSIDERATIONS: A FPD of porcelain veneered zirconia was made. After 18 months, the FPD presented a porcelain chip (porcelain fracture without exposure to the zirconia structure) on the buccal side of the pontic. An epoxy resin replica of the fractured surface was obtained and was examined under scanning electron microscopy. Fracture origin was found at the cervical area of the pontic. Intraoral repair by bonding the chipped fragment back in place was performed. After 15 days, the porcelain fragment debonded without patient knowledge and the fragment was lost. Then, intraoral repair using composite resin to restore the fractured area was performed and is still in function to date. CONCLUSIONS: Based on the 5-years survival of the performed intraoral repair, the composite resin reconstruction technique has shown to be an adequate alternative treatment for fractured FPD. CLINICAL SIGNIFICANCE: A resin composite repair of the fracture site can be performed in one clinical session, using much less time and cost than for the replacement of FPD. This clinical case survived 5 years to date.


Asunto(s)
Porcelana Dental , Circonio , Materiales Dentales , Fracaso de la Restauración Dental , Dentadura Parcial Fija , Humanos
20.
J Prosthodont Res ; 64(4): 460-467, 2020 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-32276830

RESUMEN

PURPOSE: The purpose of this study was to compare the marginal and internal fit of three-unit fixed dental prostheses (FDPs) fabricated using CAD/CAM with two designs, two cement space (CS), and two zirconia types. METHODS: A master model with two zirconia abutments and a missing tooth was scanned with an intraoral scanner. FDPs were fabricated with two designs (Full contour: FC, Framework: FW), two zirconia types (multi-layer: L, single-layer: W), and two CS values (30 and 45 µm for L and 30 µm for W). There were six experimental groups. The fit of the FDPs was evaluated using the replica method. The space between an abutment and the FDPs in the marginal (MO), chamfer (CH), axial (AX), and occlusal (OC) areas was measured under an optical microscope and the data was statistically analyzed using three-way ANOVA and Bonferroni test (p < 0.05). RESULTS: FW-l-45 µm showed a significantly smaller space than those for the FC in MO (p = 0.011), CH (p = 0.001) and AXE (p = 0.003). FW-l-30 µm showed a significantly smaller space than that for the 45 µm in AXE (p = 0.000) and OC (p = 0.016). FW-W-30 µm showed a significantly smaller space than that for the L in MO (p = 0.000), CH (p = 0.000), AXE (p = 0.000), and OC (p = 0.002). CONCLUSIONS: The design and CS of the FDPs affected the fit. FDPs with single-layer zirconia showed better fit than that obtained with multi-layer zirconia.


Asunto(s)
Adaptación Marginal Dental , Diseño de Prótesis Dental , Diseño Asistido por Computadora , Dentadura Parcial Fija , Diseño de Prótesis , Circonio
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