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Objective: This study aimed to evaluate the clinical performance of two inlay-retained bridge designs (proximal shaped and inlay shaped) in single missing posterior teeth cases. Material and Methods: A total of 70 cases with missing single posterior teeth were included in this study and divided into two groups with a 1:1 allocation ratio (n = 35 for each group). Group 1 (the control group): this group received an inlay retained bridge with inlay design on both abutments. Group 2 (the intervention group): this group received an inlay retained bridge with a proximal box on both abutments. PMMA resin (YAMAHACHI PMMA) was used for the try-in stage and monolithic zirconia (Katana, Kuraray) was used for the final restorations. The restoration surfaces were treated using sandblasting and Z-prime S (Bisco) and the cementation was done by using self-adhesive resin cement (Bisco). Fracture, marginal adaptation, postoperative sensitivity, caries, and gingivitis were assessed using the modified United States Public Health Service for restoration clinical assessments (MUSPHS standards) over 12 months of follow-up. Results: The results show there was no significant difference between the two groups. Kaplan-Meier survival curve was constructed to calculate the mean survival estimates of the two groups and we found that the two groups were clinically successful during a one-year follow-up. Conclusion: Both designs of inlay retained fixed dental prostheses revealed successful clinical performance in terms of Fracture, marginal adaptation, postoperative sensitivity, caries, and gingivitis (AU)
Objetivo: O objetivo deste estudo foi avaliar o desempenho clínico de dois modelos de ponte fixa por inlay (formato proximal e formato inlay) em casos de dentes posteriores perdidos. Material e Métodos: Um total de 70 casos com perda de um único dente posterior foi incluído neste estudo e dividido em dois grupos com uma razão de alocação de 1: 1 (n = 35 para cada grupo). Grupo 1 (grupo controle): Este grupo recebeu uma ponte fixa por inlay com deseho de inlay em ambos os pilares. Grupo 2 (grupo intervenção): Este grupo recebeu uma ponte fixa inlay com uma caixa proximal em ambos os pilares. Resina de PMMA (YAMAHACHI PMMA) foi usada para a etapa de try-in e a zircônia monolítica (Katana, Kuraray) foi utilizada para as restaurações finais. As superfícies das restaurações foram jateadas com Z-prime S (Bisco) e a cimentação realizada com cimento resinoso autoadesivo (Bisco). Fratura, adaptação marginal, sensibilidade pós-operatória, cárie e gengivite foram avaliadas usando o Serviço de Saúde Pública dos Estados Unidos modificado para avaliações clínicas de restauração (padrões MUSPHS) ao longo de 12 meses de acompanhamento. Resultados: Os resultados mostraram que não houve diferença significativa entre os dois grupos. A curva de sobrevida de Kaplan-Meier foi construída para calcular as estimativas de sobrevida média dos dois grupos e foi concluído que os dois grupos foram clinicamente bem-sucedidos durante um acompanhamento de um ano. Conclusão: Ambos os modelos de próteses dentárias fixas de inlay revelaram desempenho clínico bem-sucedido em termos de fratura, adaptação marginal, sensibilidade pós-operatória, cárie e gengivite(AU)
Subject(s)
Resin Cements , Polymethyl Methacrylate , Denture, Partial, Fixed , Fractures, BoneABSTRACT
This survey was done to evaluate awareness of various treatment modalities forreplacing single missing tooth among the people of western Maharashtra. Wewanted to assess gender wise awareness of patients regarding fixed dentalprosthesis as a treatment modality for replacement of missing tooth.METHODSThis cross-sectional study was done on 150 subjects visiting the dental college usinga self-administered structured questionnaire. The questionnaire was pre-testedthrough a pilot survey. Data was evaluated using version 16.0 of the SPSS. ChiSquare test and ANOVA were used as test of significance at p < 0.05.RESULTSOut of 150 subjects, 87 were males and 63 females. Around 64% of the subjectswanted to replace missing tooth due to difficulty in masticatory function; yet 14%knew the importance of aesthetic and speech as well. All subjects preferred fixedprosthesis for replacement of missing tooth, but higher cost of the procedure andfear of surgical trauma were the main factors for not undergoing implant treatment.Dental professionals were the main source of information about different treatmentprocedures followed by media.CONCLUSIONSThere is a strong level of awareness among the subjects about the fixed treatmentprocedure, but more than half of the subjects did not have knowledge about theimplants. It also revealed the need to provide the subjects with more knowledgeabout this treatment modality. Dental awareness is therefore necessary in order tocultivate a positive attitude towards dental implants amongst the community
ABSTRACT
Overview: Provisional Restoration plays a vital role in the long term Success of fixed partial restorations. A provisional restoration is a transitional restoration that provides protection, stabilization and function before Fabrication of the definitive prosthesis. A poorly adapted provisional restoration encourages plaque accumulation which can lead to periodontal conditions ranging from gingival Inflammation to periodontal support breakdown, this being especially true in cases where finish line margins are placed equigingivally or subgingivally. Aim of this in vitro study to compare the vertical marginal discrepancy of provisional restorations fabricated using light polymerized composite resin by direct technique. Materials and methods: Ivorine teeth (mandibular right and left 1st molar) were attached to the Typodont. Putty index was prepared Putty for each Ivorine tooth and prepared for a full crown restoration with a 1mm shoulder finish line and a uniform height of 6 mm of all the axial surfaces. After tooth preparation, impression was made with heavy body and light body using putty wash technique. Impression was immediately poured with die stone. Altogether sample size was 48. Provisional crowns fabricated using direct technique and cemented using Freegenol luting cement. They were divided into 3 groups, i.e. sixteen for each material. Die hardener was applied to the remaining part of the stone dies to prevent distortion of the die stone during aging process of the specimen. Each group was further divided into 8 depending on the type of aging process the specimens were subjected to: Pepsi, Tea and Arabian coffee and soaked for 54 hours. After immersion, the specimens were washed in distilled water, dried with filter paper, and subjected to marginal accuracy by Stereo microscope. Data obtained in the present study was subjected to statistical analysis using one-way ANOVA and inter group comparison was done with PostHoc Bonferroni’s correction SPSS Version 21. Results: Comparison of the buccal marginal discrepancies in the 3 materials used for temporary crowns using ANOVA showed significant changes when dipped in the 3 beverages. Significant buccal and lingual marginal discrepancy of all 3 temporary crowns was observed when immersed in tea compared to coffee and Pepsi as well as coffee with Pepsi by Post-Hoc Bonferroni’s correlation. Conclusion: Within the limitations of this study, it was concluded that, all the three temporary crowns fabricated from different materials showed significant marginal discrepancy when dipped in three different beverages
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El objetivo de este artículo es revisar la evidencia científica existente acerca de los tipos de retención protética fija sobre implantes: atornillada, cementada y cemento-atornillada. Fueron evaluadas sus ventajas y desventajas a fin de facilitar al clínico la elección del sistema de retención en el tratamiento rehabilitador con implantes. Si bien la evidencia científica no es concluyente, la prótesis atornillada presentaría más complicaciones técnicas, y las cementadas, más complicaciones biológicas. Por ello, las prótesis cemento-atornilladas podrían ser en la actualidad una opción de elección, por su versatilidad en la rehabilitación implanto-soportada, combinando las ventajas de cada tipo de retención (AU)
The objective of this article is to review the existing scientific evidence about the different types of retention of fixed prosthetic on implants: screwed, cemented and cement-screwed. The advantages and disadvantages of them were evaluated in order to facilitate the clinician's choice of the retention system in the rehabilitation treatment with implants. Although the scientific evidence is inconclusive, the screwed prosthesis would present more technical complications, while the cemented, more biological complications. Therefore, cement-screwed prostheses could be an option of choice, due to their versatility when rehabilitating an implant, combining the advantages of each type of retention (AU)
Subject(s)
Dental Prosthesis Retention/methods , Dental Prosthesis, Implant-Supported , Crowns , Dental Abutments , Cementation/instrumentation , Dental Prosthesis, Implant-Supported/adverse effects , Dental Restoration Failure , Evidence-Based DentistryABSTRACT
Fall is the most common cause of trauma in the elderly and a major reason of dental injury. Maxillary anterior region is the most vulnerable area to the traumatic fall. Loss of teeth and adjacent tissue in this area results in maxillofacial defects and inappropriate maxillomandibular relationship. Reconstruction of the loss requires comprehensive and careful planning to fulfill not only functional but also esthetic demand. Prosthetic approach can avoid surgically extensive intervention, reducing both treatment cost and time. This clinical report describes a 78-year-old woman with the loss of teeth and alveolar bone in maxillary anterior region due to a traumatic fall, rehabilitated with a metal-ceramic fixed dental prosthesis using gingival porcelain.
Subject(s)
Aged , Female , Humans , Dental Porcelain , Dental Prosthesis , Health Care Costs , ToothABSTRACT
A conventional approach for the treatment of long-span edentulous areas is the use of removable dentures. However, placing implants in these areas results in superior functional outcomes by increasing the stability, support, and resistance of the prostheses and improving the masticatory efficiency. Treatment modalities utilizing implants can be further classified into either removable or fixed-type prostheses. Several factors such as the amount of alveolar bone resorption, inter-arch relationship, patient preferences, and socioeconomic status should be considered when determining the appropriate treatment approach. Monolithic zirconia has been considered a suitable material for implant-supported fixed dental prosthesis, because of the drastic improvement in its mechanical properties. It exhibits fewer incidences of fracture and chipping of the prostheses, and has greater bulk of material than metal-ceramic crowns and zirconia-veneered ceramics. Moreover, highly translucent monolithic zirconia is also available in the market, and its application is gradually increasing for anterior tooth rehabilitation. The present report describes a patient who underwent full-mouth rehabilitation with fixed dental prostheses (eight upper and three lower implant placements). All teeth, except bilateral mandibular canines and left mandibular first and second premolars, were extracted after the diagnosis of generalized chronic moderate-to-advanced periodontitis of the remaining teeth. The patient reported satisfactory esthetic and functional outcomes during the one-year follow-up visit.
Subject(s)
Humans , Bicuspid , Bone Resorption , Ceramics , Crowns , Dental Prosthesis , Dentures , Diagnosis , Follow-Up Studies , Incidence , Mandible , Maxilla , Patient Preference , Periodontitis , Prostheses and Implants , Rehabilitation , Social Class , ToothABSTRACT
PURPOSE: The present study was designed to examine the clinical fit of fixed dental prosthesis fabricated by the milling-sintering method using a presintered cobalt-chromium alloy. MATERIALS AND METHODS: Two single metal-ceramic crowns were fabricated via milling-sintering method and casting method in each of the twelve consecutive patients who required an implant-supported fixed prosthesis. In the milling-sintering method, the prosthetic coping was designed in computer software, and the design was converted to a non-precious alloy coping using milling and post-sintering process. In the casting method, the conventional manual fabrication process was applied. The absolute marginal discrepancy of the prostheses was evaluated intraorally using the triple-scan technique. Statistical analysis was conducted using Mann-Whitney U test (α=.05). RESULTS: Eight patients (66.7%) showed a lower marginal discrepancy of the prostheses made using the milling-sintering method than that of the prosthesis made by the casting method. Statistically, the misfit of the prosthesis fabricated using the milling-sintering method was not significantly different from that fabricated using the casting method (P=.782). There was no tendency between the amount of marginal discrepancy and the measurement point. CONCLUSION: The overall marginal fit of prosthesis fabricated by milling-sintering using a presintered alloy was comparable to that of the prosthesis fabricated by the conventional casting method in clinical use.
Subject(s)
Humans , Alloys , Clinical Study , Crowns , Dental Prosthesis , Methods , Prostheses and ImplantsABSTRACT
The direct metal laser sintering (DMLS) technique would be promising for the full-arch implant-supported restorations due to reduced cost and manufacturing time without potential human errors and casting defects. The aims of this case report were to describe the successful outcome of an implant-supported fixed dental prosthesis in the edentulous maxilla by using the DMLS technology and computer-aided design and computer-aided manufacturing (CAD/CAM) monolithic zirconia crowns, and to describe its clinical implications. A healthy 51-year-old Korean woman visited Seoul National University Dental Hospital and she was in need of a rehabilitation of her entire maxilla due to severe tooth mobility. In this case, all maxillary teeth were extracted and an implant-supported fixed dental prosthesis was fabricated that involved a cobalt-chromium (Co-Cr) framework with the DMLS technique and CAD/CAM monolithic zirconia crowns. Six months after delivery, no distinct mechanical and biological complications were detected and the prosthesis exhibited satisfactory esthetics and function. In this case report, with the DMLS system, the three-dimensional printed prosthesis was created without additional manual tooling and thus, reliable accuracy and passive fit were obtained.
Subject(s)
Female , Humans , Middle Aged , Computer-Aided Design , Crowns , Dental Prosthesis , Esthetics , Maxilla , Prostheses and Implants , Rehabilitation , Seoul , Tooth , Tooth MobilityABSTRACT
Abstract The aim of this study was to evaluate the peri-implant bone loss of External Hexagon (EH) and Morse Taper (MT) implants in patients wearing immediately loaded mandibular overdentures during a 1-year follow-up. This is a non-randomized controlled clinical trial including 18 MT and 22 EH implants. Periapical radiographs were taken after overdentures insertion and following 1 year. The peri-implant bone loss was assessed through digitalization and analysis of the radiographs in the software Corel DRAW X7. For this, measurement from implant platform to residual ridge at mesial and distal surfaces of each implant was conducted. The results showed high success rate in the groups EH (100%) and MT (94.4%). For peri-implant bone levels, it was found significant difference between the groups (p=0.032) and greater bone loss was observed in the group EH. In general, bone loss was 0.85mm (±0.82) for EH and 0.10mm (±1.0) for MT. It was concluded that greater bone loss occurred in the group EH in comparison to the group MT after a 1-year follow-up.
Resumo O objetivo deste estudo foi avaliar a perda óssea peri-implantar de implantes Hexágono Externo (HE) e Cone Morse (CM) em usuários de sobredentaduras mandibulares com carga imediata por um período de acompanhamento de 1 ano. Este é um ensaio clínico controlado não randomizado que inclui 18 CM e 22 HE. Radiografias periapicais foram obtidas na instalação das sobredentaduras e 1 ano após. A perda óssea peri-implante foi avaliada através da digitalização e análise das radiografias no software Corel DRAW X7. Para tal, a medição foi feita da plataforma dos implantes até a crista óssea nas faces mesiais e distais de cada implante. Os resultados mostraram alta taxa de sucesso nos grupos HE (100%) e CM (94,4%). Para os níveis ósseos peri-implantes, foi encontrada diferença significativa entre os grupos (p = 0,032) e maior perda óssea foi observada no grupo HE. Em média, a perda óssea foi de 0,85 mm (±0,82) para HE e de 0,10 mm (±1,0) para CM. Concluiu-se que uma maior perda óssea ocorreu no grupo HE em comparação com o grupo CM após um acompanhamento de 1 ano.
Subject(s)
Humans , Male , Female , Adult , Middle Aged , Aged , Denture, Overlay , Immediate Dental Implant Loading , Osteoporosis/etiology , Radiography, DentalABSTRACT
PURPOSE: Manufacturing with AM (Additive manufacturing) technique has many advantages; but, due to insufficient study in the area, it is not being widely used in the general clinic. In this study, differences of flexural strength among various materials of 3 unit fixed dental prosthesis were analyzed. MATERIALS AND METHODS: A metal jig for specimens that had a 3-unit-fixed dental prosthesis figure were fabricated. The jigs were made appropriately to the specifications of the specimens. Three different kinds of materials of specimens which were NC (mathacrylic esther based), DP-1 (Bisphenol A epoxy acrylate type oligomer based), and DT-1 (urethane acrylate based) were printed with DLP machine. Five specimens for each kind of material were printed with an angle of 30° from the horizontal surface. The specimens were placed on the jig and the flexural strength was measured and recorded using Universal testing machine. The recorded data was analyzed in SPSS using One-way ANOVA and Tukey HSD to determine the significance of the differences of flexural strength among the groups. RESULTS: The flexural strengths of each group were the followings: NC, 1119 ± 305 N; DP-1, 619 ± 150 N; DT-1, 413 ± 65 N. Using One-way ANOVA and Tukey Honestly Significant Difference test, significant difference was found between NC and the other groups (P 0.05). CONCLUSION: Higher flexural strength was shown in 3-unit-fixed dental prosthesis that were 3D printed using a DLP machine with NC material.
Subject(s)
Dental Prosthesis , Printing, Three-DimensionalABSTRACT
Aims: This cross-sectional study aimed to explore potential factors influencing oral health related quality of life (OHRQoL) in a Chinese population treated with anterior dentition fixed dental prosthesis (FDP). Study Design: Cross-sectional study. Place and Duration of Study: West China Hospital of Stomatology, Sichuan University, between December 2012 and May 2013. Methodology: According to the patient records in the dental hospitals, 1918 patients were initially selected and invited for a follow-up examination. After the selection, 987 participants were finally included and asked to complete a questionnaire which included three forms: Basic information, the Chinese version of Oral Health Impact Profile-14 items (OHIP-14) and Social Readjustment Rating Scale (SRRS). After data collection, independent sample t-test, one-way ANOVA and spearman rank correlation were used to assess each variable’s independent impact on OHRQoL, while multifactor impact was evaluated by stepwise linear regression. Results: 987 responses were acquired. Higher age caused a higher OHIP-14 score. For prosthesis material, all ceramic presented the lowest OHIP-14 score. For prosthesis type, veneer presented the lowest OHIP-14 score. Either prosthesis service time or SRRS score was positively correlated to OHIP-14 score. In stepwise linear regression, prosthesis material/service time/type and life stress were finally defined as OHRQoL predictors. Conclusion: Three prosthetic characteristics (prosthesis material/service time/type) and life stress are responsible for OHRQoL level of patients treated with anterior FDP.
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PURPOSE: This study was to evaluate the effect of grinding of the inner metal surface during the porcelain try-in stage on metal-porcelain bonding considering the maximum temperature and the vibration of samples. MATERIALS AND METHODS: Ninety-one square prism-shaped (1 x 1 x 1.5 mm) nickel-chrome cast frameworks 0.3 mm thick were prepared. Porcelain was applied on two opposite outer axial surfaces of the frameworks. The grinding was performed from the opposite axial sides of the inner metal surfaces with a low-speed handpiece with two types of burs (diamond, tungsten-carbide) under three grinding forces (3.5 N, 7 N, 14 N) and at two durations (5 seconds, 10 seconds). The shear bond strength (SBS) test was performed with universal testing machine. Statistical analyzes were performed at 5% significance level. RESULTS: The samples subjected to grinding under 3.5 N showed higher SBS values than those exposed to grinding under 7 N and 14 N (P.05). The types of bur (P=.965) and the duration (P=.679) did not affect the SBS values. On the other hand, type of bur, force applied, and duration of the grinding affected the maximum temperatures of the samples, whereas the maximum vibration was affected only by the type of bur (P<.05). CONCLUSION: Grinding the inner metal surface did not affect the metal-porcelain bond strength. Although the grinding affected the maximum temperature and the vibration values of the samples, these did not influence the bonding strength.
Subject(s)
Dental Porcelain , Dental Prosthesis , Hand , VibrationABSTRACT
Spacing in dentition negatively interferes with harmony of the smile. A lot of literature has been devoted to prosthetic closure of such space(s) in the dentition; however, the only option for maintaining space(s) in tooth-supported fixed dental prosthesis (FDP) is with the aid of loop connectors. Eleven patients (seven males and four females) with mean age of 45.18 years (range 22-70 years), previously treated with porcelain fused to metal full coverage restorations joined with loop connectors, were evaluated clinically to assess the clinical status and longevity of treatment provided. All the patients were asked to fill a simple close-ended questionnaire to provide their perspective on the limitations and outcome of the treatment and rate their satisfaction level on the scale of 1-10. The cumulative survival of the FDPs with the aid of loop connectors was 90.9%. There was no reported esthetic failure and, at the time of responding to the questionnaire, none of the patients had active complaint with respect to the prosthesis and all but one of the patients were satisfied with the treatment provided. Clinical survivability and the patient feedback suggests that customized designing of loop connectors for each patient is an excellent treatment modality to successfully maintain excessive (single/generalized) spacing between teeth and effectively splint pathologically migrated and mobile teeth. The reported problems with this treatment option are all transient in nature.
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Objectives: The goal of every prosthetic management is to simulate nature and be in harmony with nature within the physiological limits. The occlusal forces on a fixed dental prosthesis are transmitted to the surrounding structures through pontics, connectors and retainers and more stresses are seen at the connector region. To analyze the stress patterns in cast and soldered connectors between the two pontics and between the retainer and pontic of a four unit fixed dental prosthesis on axial and non axial loading and also to observe and ascertain the need to modify the design of the rigid connectors. Materials and Methods: Subsequently four models each of cast and soldered connectors with cylindrical and triangular design, of dimension 3 × 4 mm and thickness 0.5 mm was designed for the study. The first premolar and second molar were considered as the abutments and 2 nd premolar and 1 st molar as the pontics. The analysis was done using ANSYS version 8.0 software and by placing axial and non-axial load of 40 Newtons each. Results: Von Misses stresses were observed at the connector region between the two pontics, especially in the cervical region. Conclusion: The cylindrical cast connectors showed less stress in comparison to triangular design and the difference in the stress distribution of cast and soldered connectors were marginal. Clinical Significance: The occlusal forces on a fixed dental prosthesis are transmitted to the surrounding structures through pontics, connectors and retainers with maximum stresses concentrated at the connectors. Hence this three-dimensional finite element analysis study investigated stress distribution in a four unit posterior fixed dental prosthesis, having cylindrical and triangular connector designs.
ABSTRACT
Proper management of provisional prosthesis is key to success in prosthodontics. Provisional restoration on maxillary anterior missing area frequently come across a incident of falling off especially in patients with long span pontics and oval arch shape. This is because maxillary anterior teeth are more exposed to horizontal force than the posterior teeth and additional anterior cantilever effect will negatively affect to the retention of provisional prosthesis. Beside that maxillary anterior provisional prosthesis should provide proper incisal guidance during the mandibular functional movements. However occlusal contacts on the prosthesis in maximum intercuspal position are located on opposite side of fulcrum line of prosthesis which will cause removing force against the provisional prosthesis. This case report present that provisional implant prevent pre-described harmful effect on maxillary anterior fixed provisional prosthesis and provide comfort and satisfactory result during post-extraction healing period.
Subject(s)
Humans , Denture, Partial, Fixed , Prostheses and Implants , Prosthodontics , Retention, Psychology , ToothABSTRACT
Aim: To evaluate vertical misfit and cement line quality of onlays cemented with resin luting cements using two different methods for removal of excess cement. Materials & Methods: Lithium di-silicate restorations were fabricated and cemented at 24 human molars that received onlay type preparations. The specimens were randomly divided in two groups (n = 12): Group 1 (G1) where cement excess was removed at pre-gel stage and Group 2 (G2) with cement excess was removed after polymerization. Vertical misfits measurements at cement line were performed twice, before and after cementation. Epoxy resin replicas were obtained from the specimens and cement line quality was analyzed with a scanning electron microscope before and after the finishing and polishing procedures. The replicas were also classified according to their condition in unsatisfactory, acceptable or good. Vertical misfits values were submitted to Student test (p < 0.05) and the quality line data were analyzed with Mann-Whitney for independent samples (p < 0.05) and Wilcoxon test for paired specimens (p < 0.05). Results: Vertical misfit and cement line quality presented no difference values to G1 (26.60 ± 8.0) and G2 (24.10 ± 8.0). However, finishing and polishing procedures affect positively the cement line quality in both groups (p = 0.59). Conclusion: The cement excess removal methods had no influence on vertical misfit and cement line quality for restorations. Finishing and polishing procedures improved the cement line quality in both groups.
Objetivo: Avaliar adaptação marginal e a influência do polimento sobre a linha de cimentação de restaurações cerâmicas cimentadas com cimento resinoso utilizando duas formas dois métodos de remoção do excesso do cimento. Métodos: Foram fabricadas restaurações em cerâmica reforçada por dissilicato de Lítio e cimentadas à vinte e quatro molares humanos que receberam preparos protéticos tipo onlay. Os corpos de prova foram divididos aleatoriamente em dois grupos (n = 12): Grupo 1 (G1) em que o excesso de cimento foi removido no estágio pré-gel e Grupo 2 (G2) em que o excesso de cimento foi removido após a polimerização. A mensuração da desadaptação marginal foi realizadas em dois momentos, antes e depois da cimentação. Réplicas em resina epóxi de todos os corpos de prova foram confeccionadas para avaliação da qualidade da linha de cimentação utilizando um microscópio eletrônico de varredura antes de depois dos procedimentos de acabamento e polimento e classificado como insatisfatório, aceitável e boas condições. Os valores de desadaptação foram submetidos ao teste t de Student (p < 0,05) e os dados de qualidade da linha de cimentação foram analisados pelo teste de Mann-Whitney para amostras independentes (p < 0,05) e pelo teste de Wilcoxon para amostras pareadas (p < 0,05). Resultados: A desadaptação marginal e a qualidade da linha de cimentação não apresentaram diferença significativa G1 (26,60 ± 8,0) e G2 (24,10 ± 8,0). Entretanto, os procedimentos de acabamento e polimento influenciaram positivamente a qualidade da linha de cimentação em ambos grupos (p = 0,59). Conclusão: O método de remoção do excesso de cimento não influenciou a adaptação ou a qualidade da linha de cimentação das restaurações cerâmicas. Os procedimentos de acabamento e polimento melhoraram a qualidade da linha de cimento nos dois grupo
Subject(s)
Dental Marginal Adaptation , Denture, Partial, FixedABSTRACT
Aims: The aim of the study was to evaluate and compare the oral stereognostic ability and satisfaction for fixed prosthesis in human being. Materials and Methods: The present study was carried out on 40 subjects, the purpose being to investigate the relation of oral perception to diagnostic and therapeutic procedures. Two types of cast metal crowns-one had morphology closely resembling original tooth and other one confirmed to ideal contours were constructed on endodontically treated posterior tooth. One cast metal crown was randomly selected from two cast metal crown and fitted on prepared tooth. Oral stereognostic score of subject was determined by correct response to questionnaire based on the recognition ability of subjects. Patient satisfaction level was checked by psychometric parameter Likert scale. Same procedure was repeated with other type of cast metal crown. Results: Data obtained were compared by paired and unpaired two sample t-test. Oral stereognostic score and satisfaction score were found to be higher for cast metal crown with morphology resembling to original tooth due to recognition and discriminatory ability of subjects and recall-memory. Oral stereognostic level was found to be higher in younger than older subjects. The level of satisfaction was found to be higher in older subjects than younger subjects. Conclusion: It was concluded that acceptance of fixed prosthesis is not only based on dentist's routine procedure of treatment and patient's judgment about oral health, function, and esthetics, but also depends upon patient's oral perception and discriminatory skill for external morphology of fixed prosthesis.
Subject(s)
Adult , Age Factors , Chromium Alloys/chemistry , Crowns , Dental Marginal Adaptation , Dental Occlusion , Dental Prosthesis Design , Discrimination, Psychological/physiology , Female , Humans , Male , Mental Recall/physiology , Middle Aged , Patient Satisfaction , Pattern Recognition, Physiological/physiology , Stereognosis/physiology , Surface Properties , Tongue/physiology , Tooth, Nonvital/therapy , Young AdultABSTRACT
A reabilitação oral de pacientes edentados totais inferiores através de implantes com carga imediata tem se tornado um procedimento seguro e de alta previsibilidade. Entretanto, a reabilitação de maxilas edêntulas continua sendo um dos procedimentos mais complexos da Implantodontia. O objetivo deste trabalho foi analisar a efetividade de implantes utilizados em reabilitação total superior submetida à carga imediata. Foram selecionados estudos clínicos de indivíduos que se submeteram a uma reabilitação total superior implanto-suportada com carga imediata. Os estudos foram analisados a partir de itens estabelecidos e, posteriormente, os dados obtidos foram transcritos para uma tabela que serviu de base para a análise dos resultados. A taxa de sucesso dos implantes foi medida segundo o tempo de acompanhamento do estudo e segundo o número de implantes por individuo. Segundo o tempo de acompanhamento, a taxa de sucesso foi de 98,5% quando acompanhados até dois anos e 96,5% quando acompanhados por um período de três a sete anos. Quanto ao número de implantes por individuo, a taxa de sucesso foi de 97,4% quando utilizados quatro implantes, 98,15% quando utilizados de cinco a sete implantes e 98,8% quando utilizados de oito a 12 implantes. Portanto, conclui-se que a taxa de sucesso dos implantes utilizados em protocolos totais superiores com carga imediata aumentou proporcionalmente ao número de implantes utilizados e diminuiu quanto maior for o tempo de acompanhamento do estudo.
The oral rehabilitation of total edentulous mandibular patients through immediate-loaded implants has become a safe procedure with a high predictability. However, the rehabilitation of edentulous maxilla is still one of the most complex procedures of dentistry. The objective of this study was to analyze the effectiveness of immediately loaded implants supporting fixed prostheses in the edentulous maxilla. The scientific articles had been analyzed through established item and later the screened data had been analyzed. The rate of success of the implants was measured according to time of follow- up of the study and according to the number of implants per individual. According to time follow-up, there was a success rate of 98.5% when followed for two years and 96.5% when followed for three to seven years. According to the number of implants per individual, the success rate was 97.4% when four implants were used, 98.15% when five to seven implants were used and 98.8% when eight to 12 implants were used. Therefore, it is concluded that the rate of success of implants used in total upper fixed protocols with immediate loading increases along with the number of implants used and decreases with the number of follow-up time intervals.