Resin-bonded Bridges Research Articles

Comparison of Tensile Bond Strength of Fixed-Fixed Versus Cantilever Single- and Double-Abutted Resin-Bonded Bridges Dental Prosthesis.

Resin-bonded fixed dental prostheses (RBFDP) are minimally invasive alternatives to traditional full-coverage fixed partial dentures as they rely on resin cements for retention. This study compared and evaluated the tensile bond strength of three different resin-bonded bridge designs, namely, three-unit fixed-fixed, two-unit cantilever single abutment, and three-unit cantilever double-abutted resin-bonded bridge. Furthermore, the study attempted to compare the tensile bond strengths of the Maryland and Rochette types of resin-bonded bridges. Based on the inclusion and exclusion criteria, a total of seventy-five extracted maxillary incisors were collected and later were mounted on the acrylic blocks. Three distinct resin-bonded metal frameworks were designed: three-unit fixed-fixed (n = 30), two-unit cantilever single abutment (n = 30), and a three-unit cantilever double abutment (n = 30). The main groups were further divided into two subgroups based on the retainer design such as Rochette and Maryland. The different prosthesis designs were cemented to the prepared teeth. Later, abutment preparations were made on all specimens keeping the preparation as minimally invasive and esthetic oriented. Impression of the preparations were made using polyvinyl siloxane impression material, followed by pouring cast using die stone. A U-shaped handle of 1.5 mm diameter sprue wax with a 3 mm hole in between was attached to the occlusal surface of each pattern. The wax patterns were sprued and cast in a cobalt–chromium alloy. The castings were cleaned by sandblasting, followed by finishing and polishing. Lastly, based on the study group, specimens for Rochette bridge were perforated to provide mechanical retention between resin cement and metal, whereas the remaining 15 specimens were sandblasted on the palatal side to provide mechanical retention (Maryland bridge). In order to evaluate the tensile bond strength, the specimens were subjected to tensile forces on a universal testing machine with a uniform crosshead speed. The fixed-fixed partial prosthesis proved superior to both cantilever designs, whereas the single abutment cantilever design showed the lowest tensile bond strength. Maryland bridges uniformly showed higher bond strengths across all framework designs. Within the limitations of this study, the three-unit fixed-fixed design and Maryland bridges had greater bond strengths, implying that they may demonstrate lower clinical failure than cantilever designs and Rochette bridges.

Evaluation of Bond Strength of Cantilever Resin-retained Bridge Designs: An In Vitro Study

The aim of the study was to compare the bond strength of three cantilever resin-bonded bridge (RBB) designs cemented with resin cements. Twenty-four extracted human mandibular canines with eight teeth per group were used in this study to evaluate the bond strength of cantilever resin-retained bridge designs of the mesh, perforated, and combination of mesh and perforated luted to the prepared lingual surface of canine teeth using resin cement. Debonding was done using Instron universal testing machine by applying load on the mid-buccal region of the pontic and the obtained values were evaluated. The data was analyzed statistically. The mean shear bond strengths of mesh, perforated, and combination of mesh and perforated are 0.88 ± 0.31 MPa, 0.81 ± 0.31 MPa, and 0.93 ± 0.32 MPa. However, there is no significant differences in the statistical analysis that were performed using a one-factor analysis of variant (ANOVA) test (p = 0.744). Within the limitation of this study for cantilever resin-retained bridge designs, the combination of mesh and perforated design showed greater mean shear bond values when compared with the mesh design and perforated designs. This shows equal in vitro performance to the gold standard designs (group A is mesh design and group B is perforated design). The new design which is the combination of mesh and perforated shows equal in vitro performance to the gold standard designs. Thus, their use in clinical situation can bring better result in concern to cantilever resin-retained prosthesis.

The Post-Cementation Periodontal Response to Resin Retained Bridge

Objective: To compare the mean periodontal health of resin retained abutment tooth with its baseline score.Study Design: Quasi-experimental study.
 Place and Duration of Study: Department of Prosthodontics, Armed Forces Institute of Dentistry Rawalpindi Pakistan, from Oct 2019 to Mar 2020.
 Methodology: Before starting abutment preparation, the baseline scores for gingival index, plaque index and periodontal pocket depth of the abutment teeth were calculated. The gingival index was calculated using a blunt probe, whereas the periodontal pocket depth of the teeth in both groups was calculated using a calibrated periodontal probe.
 Results: According to the results recorded there was a significant difference seen in the mean periodontal health of abutment teeth before and after the cementation of the resin-bonded bridge. Our calculated p-value (0.001) indicated definitive significance associated with both the groups i.e., before and after the score of gingival indices and before and after the score of periodontal pocket depth, after 30 days of provision of the resin-bonded bridge.
 Conclusion: There was a significant association found in the mean periodontal health of abutment teeth before and after the cementation of the resin-bonded bridge.

Debonding of cast metal-based cantilever and fixed-fixed resin-retained bridgework: A review of the literature.

Cast metal-based resin-retained bridgework (RRB) offers a practical, conservative approach when restoring edentulous spaces. This review examines the debonding of cast metal-based RRB, comparing cantilever resin-retained bridgework (CRRB) and fixed-fixed resin-retained bridgework (FRRB) designs taking into context developments in RRB design, construction, and cementation over time. An electronic search was conducted through Medline and Embase with the aid of Boolean operators to combine the following key words: "adhesive bridges", "resin-bonded bridges", "resin-retained bridges", "resin-bonded fixed partial dentures", "cantilever", "debond", "fixed-fixed", "decementation", "failure", "success", "outcome", "longevity" and "survival". The search was limited to peer-reviewed articles written in English and published from 1995 through to 2019. Thirty-one studies were included. Five studies compared the longevity of CRRB versus FRRB, five assessed the clinical performance of CRRBs alone, and 21 studies assessed the clinical performance of FRRBs. There was great variability in study design and the reporting of clinical outcomes, and an analysis and critique of the included papers is provided. Overall, CRRB tend to debond less and hence provide longer-term and more reliable clinical service when compared to FRRB. More high-level, long-term, prospective and clinical controlled trials are required to further analyse and evaluate the long-term outcomes of cast metal-based RRB.

Designing anterior cantilever resin-bonded fixed dental prostheses based on finite element analysis.

A resin-bonded bridge (RBB) is a minimally invasive prosthetic treatment option for intact adjacent teeth. However, it is contentious as to whether the mesial or distal adjacent tooth should be used as an abutment. This study aimed to investigate the potential of finite element analysis (FEA) for the selection of abutment teeth and the determination of the optimal design for anterior cantilever RBBs. Three types of RBBs were designed to simulate loss of the maxillary left lateral incisor. The fixed-fixed RBB (FF-RBB) had one retainer each for the left central incisor and canine. Distal- and mesial-cantilever RBBs (D-CRBB and M-CRBB) had a single retainer on the central incisor and canine, respectively. Three-dimensional models for FEA were generated from computed tomography slices and dental casts. FEA was performed for each RBB to evaluate stresses in the intercuspal, protrusive, and lateral mandibular positions. The maximum principal stresses on the bridges in the intercuspal position were 141.9 MPa, 93.6 MPa, and 45.7 MPa, for the FF-RBB, D-CRBB, and M-CRBB, respectively. The stress in the D-CRBB position was greater than in the M-CRBB position in the intercuspal, protrusive, and lateral mandibular positions. Based on the results, M-CRBB on the canine had a higher clinical performance than D-CRBB on the central incisor. FEA was useful for determining the optimal design of RBB for each patient.

Resin-bonded bridge as a simplified approach to restore missing teeth in esthetic zone by conventional and digital techniques

Resin-bonded bridge as a simplified approach to restore missing teeth in esthetic zone by conventional and digital techniques

Esthetic and Functional Rehabilitation of a Patient with Amelogenesis Imperfecta Using Adhesive and Non-Invasive Techniques: A Case Report

Introduction: Limited evidence is available on adhesive dentistry in the management of amelogenesis imperfecta (AI). The presentation, the conservative management with adhesive techniques, and the outcome of hypoplastic AI are discussed. Case Report: Autosomal dominant, hypoplastic AI was diagnosed, on a 36-year-old woman, presented with unesthetic teeth and a history of frequent decay with subsequent complications. Following the hygienic phase, stabilization of caries and root canal treatment (RCT) were done. Coronal restoration of endodontically treated teeth and light-cured direct composite veneering were done in the restorative phase. Surveyed crowns, mucosa-borne partial denture, and a resin-bonded bridge were prescribed in the prosthetic phase. The patient was pleased with the improved masticatory ability and esthetics. Discussion: A stepwise least invasive, yet esthetically acceptable treatment options based on adhesive techniques are successful in hypoplastic AI.

Research progress on effect of different materials on the retention rate of Resin-Bonded Bridges

Research progress on effect of different materials on the retention rate of Resin-Bonded Bridges

Prevalence and management of patients with hypodontia: A cross-sectional study.

Hypodontia is one of the most common anomalies in dentistry. Hypodontia has a negative impact on oral health-related quality of life with patients best seen in a multidisciplinary clinic to improve treatment outcomes. To investigate the prevalence of hypodontia and its association with other dental anomalies, as well as malocclusion, and to investigate the treatment planned for patients attending the clinic and whether the type of missing teeth affected the proposed treatment. Analysis of consecutive patients attending the hypodontia clinic at a dental hospital between February and November 2020. A total of 100 patients who met the inclusion criteria were identified. Data collected included the following: age/sex; number and type of missing teeth; pre-treatment occlusion; presence of other dental anomalies; and planned treatment. A total of 100 patients (55% female; age range = 7-41 years; mean age = 18 years) were included. Of the cohort, 47% had a class I skeletal relationship and participants were significantly less likely to have a class III skeletal or incisor relationship; 45% had another dental anomaly with the most common being microdontia. Space opening was the preferred treatment option for those managed by orthodontic treatment with resin-bonded bridges most likely to be used for restoration of spaces, 86%. Lower second premolars were the most commonly missing teeth. Participants were significantly less likely to have a class III incisor or skeletal relationship than class I or II. Space opening was the favoured approach for orthodontic treatment, particularly for maxillary lateral incisors.

IMMEDIATE AESTHETIC REHABILITATION OF A FRACTURED ANTERIOR TOOTH BY USING THE NATURAL TOOTH AS A PONTIC: AN INNOVATIVE TECHNIQUE

Sudden tooth loss in the esthetic zone of the maxillary or mandibular anterior region can be due to dental trauma, endodontic failure, extensive root resorption, or advanced periodontal disease. The treatment options for replacing the missing tooth can vary between removable temporary acrylic prosthesis, Resin-bonded bridges, Traditional metal, and ceramic fixed partial denture, and implant-supported prosthesis. Irrespective of the final treatment, the first line of management would be to provisionally restore the patients esthetic appearance at the earliest, while functionally stabilizing the compromised arch. Using the patients own natural tooth as a pontic offers the benefits of being the right size, shape, and color and provides exact repositioning in its original intraoral three-dimensional position. The abutment teeth can also be preserved with minimal or no preparation, thus keeping the technique reversible, and can be completed at the chairside thereby avoiding laboratory costs.

Efficacy of Natural Tooth Pontic in Periodontally Compromised Patients: A Systematic Review

Periodontitis is a major concern for the dentist because the destruction of periodontal fibers causes mobility of teeth and eventually leads to tooth loss. Conventional techniques like removable temporary acrylic prosthesis, or resin-bonded bridges hold their own disadvantages and a fixed prosthesis may worsen the existing condition. Natural tooth pontic (NTP) in such cases may be advantageous in terms of esthetics and patient satisfaction along with cost effectiveness. Hence, the aim of this review was to evaluate the efficacy of NTP in periodontally compromised patients. Electronic search on data sources such as PubMed and Google scholar along with hand searching of the articles was done in institutional library. All case reports and case series were included in English language published till October 31, 2019, were included. After applying inclusion and exclusion criteria, ten articles were selected for the present review. The whole process was conducted by following the Preferred Reporting Items for Systematic Reviews guidelines. Our review noted that all the patients were satisfied with the appearance of the tooth and also comfortable in maintaining the oral hygiene as these pontics had a ridge lap design. Survival rate was 100% except for the case series which reported a survival rate of 75% while few others did not report anything since no follow-up was conducted. Overall NTP was well accepted by the patients. NTP can be of a great option as prosthesis in the patients with compromised periodontium. Patient's positive satisfaction, cost viability, and accomplishment of appearance in the esthetic zone of the oral cavity make this strategy as a valuable treatment option.

Contouring an abutment tooth to aid placement of a resin-bonded bridge

Dental UpdateVol. 48, No. 4 Technique TipsContouring an abutment tooth to aid placement of a resin-bonded bridgeDaniel CagaDaniel Cagaemail: E-mail Address: [email protected]Associate Dentist, 606 Dental Practice, SolihullSearch for more papers by this authorDaniel CagaPublished Online:17 Apr 2021https://doi.org/10.12968/denu.2021.48.4.332AboutSectionsView articleView Full TextPDF/EPUB ToolsAdd to favoritesDownload CitationsTrack Citations ShareShare onFacebookTwitterLinked InEmail View article

Dental Implants in Maxillary Anteriors for Young Adults: A Retrospective Study.

The absence of upper anterior teeth is a serious problem and often needs a challenging treatment. The treatment alternatives include resin-bonded bridge work, osseointegrated implants, removable dentures, and autotransplantation of developing premolars. The aim of the study was to evaluate implant prosthesis as a treatment option for missing maxillary anterior teeth among young adults. A study comparing different treatment modalities advised for replacement of missing anterior teeth with implants placed in those patients was conducted. Date of age, gender, type of replacement advised and chosen by the patients were obtained from the records at the dental hospital. About 64.07% of patients were advised for fixed partial dentures and 35.93% of patients were advised for implants in replacement of missing anterior teeth among young adults. The 21-30 years age group was found to be the most common age group with replacement of implant in the missing anterior tooth among young adults with higher incidence among males (84.81%). Anterior implant supported prosthesis in patients with missing maxillary teeth improves patients' psychological outlook in terms of dental aesthetics and instills a positive attitude and behaviors among patients.

Single tooth implant versus resin-bonded bridge: A study of patient’s satisfaction

Abstract Objective: To compare the patients’ satisfaction between patients treated with single tooth implant (STI) or resin bonded bridge (RBB) for single missing tooth replacement. Methods: A cross-sectional study was conducted in Faculty of Dentistry, Universiti Teknologi MARA (UiTM). Patients treated using STI (n=26) and RBB (n=26) were prospectively recruited. A validated patient satisfaction questionnaire was given to the participants to assess the aesthetics, masticatory function, phonetics, ease of cleaning and cost satisfaction using 7- point Likert scale. Demographic data (gender and age) and treatment data (site of treatment) were also collected. Differences in various aspects of satisfaction were compared. Results: STI and RBB groups has similar demographic and treatment characteristics. Both groups revealed high satisfaction with most of the aspects in the questionnaire. There was no statistically significant difference in overall satisfaction between the two treatment groups (p = 0.189). However, STI group had a significant higher score in existing appearance (p = 0.010), mastication (p = 0.018) and phonetics (p = 0.029) compared with RBB. Level of satisfaction did not differ by gender, age and site of the prostheses (p > 0.05). Almost all of the participants would choose to undergo the same treatment again in UiTM (STI = 96.2%, RBB = 92.3%). Conclusion: Both STI and RBB participants were highly satisfied with the aesthetics, phonetics, cost and found that the treatment fees were justified and reasonable in UiTM. Therefore, both treatment options are good to be indicated for single missing tooth replacement.

Factors Affecting Decision-Making For Congenitally Missing Permanent Maxillary Lateral Incisors: A Retrospective Study.

The aims of this study were as follows: 1) to retrospectively evaluate clinical situations of patients with congenitally missing permanent maxillary lateral incisors (CMPMLI) who were referred to three dental clinics specialised in prosthodontics over a 14-year period and 2) to investigate the factors affecting decision-making for patients with CMPMLI. The records of 46 patients with CMPMLI who were treated over a period of 14 years were examined to determine the mechanism of decision-making for treatment planning and factors affecting the decision. Descriptive statistics were used in the initial analysis of the entire data set. In addition, a correlation coefficient-the nonparametric Spearman's rho coefficient-was calculated to trace any possible relation between variables or rank orders. The significance level was set at 0.05 for the analysis. The results of this study revealed that decision-making for treatment of CMPMLI is directly dependent mainly on the following four factors: 1. Patient's age at treatment commencement 2. Individual characteristics of each clinical situation, which play a crucial but not an exclusive role in the treatment approach 3. Synthesis of the participating specialists in the treating team, which plays a crucial role in the decision-making 4. Use of pin-retained resin-bonded bridges (RBBs), either bilaterally attached or cantilevered, proved to be a reliable solution in terms of aesthetics, function and soft tissue response during the study period. Clinical implication: The rationale in the decision-making process for patients with congenitally missing permanent maxillary lateral incisors was investigated in this study to determine whether specific treatment options are superior to others.

Resin-bonded Bridges: Survival and Recent Concept

Resin-bonded Bridges: Survival and Recent Concept

Cantilever Resin-bonded Bridge Design: A Review

Cantilever Resin-bonded Bridge Design: A Review

Resin bonded bridges in patients with hypodontia: Clinical performance over a 7 year observation period

PurposeResin bonded bridges (RBBs) are considered a conservative option in the management of hypodontia. This study targeted to analyze the survival of resin bonded bridges provided to patients with Hypodontia by staff and students at the Department of Restorative Dentistry, University Dental School and Hospital Cork, Ireland. It was also to determine the factors that may influence the survival of RBBs in patients with hypodontia. MethodsForty patients with hypodontia who received 65 RBBs from 2001 to 2007 were identified and contacted to be recruited for this study. Of these, nine were not contactable, and five failed to attend. Accordingly, 26 patients (65%) participated in the study, with a total of 51 RBBs. ResultsOf the 51 RBBs evaluated, 44 (86%) were still in situ and functional and 7 (14%) failed. The main reason for failure was repeated debonding. The effect of age, gender, the grade of operator and experience, bridge location, design of the bridge, span length and moisture control during cementation, could not be demonstrated. ConclusionThe effect of age, gender, the grade of operator and experience, bridge location, design of the bridge, span length and moister control on RBB survival could not be demonstrated. Majority of patients with hypodontia showed satisfaction with resin bonded bridges. In replacing congenitally missing teeth in patients with hypodontia, resin-bonded bridges would be an acceptable treatment option.

Ribbond reinforced composite bridge: a case report

Various options are presently available to address the challenge of immediately replacing a missing anterior tooth. These include a removable /fixed temporary/ permanent acrylic prosthesis, or resin-bonded bridges. Ribbond single-visit bridges provide strength, durability, and immediate convenience. They are cost effective and reliable and are excellent for emergencies like: implant temporization, congenitally missing teeth and patients who cannot afford conventional lab fabricated bridgework. In place of the pontic, a natural tooth, denture tooth can be used or composite build-up can be done. Conclusions: The procedure was completed at the chair side, thereby avoiding additional laboratory costs. Creating an adhesive FRC bridge by using a composite resin pontic is a successful treatment option for the direct aesthetic replacement of missing anterior teeth. Keywords: Ribbond, Fiber reinforced.

LABORATORY STUDY OF STRENGTH CHARACTERISTICS GLASS-FIBER REINFORCED LIGHT-CURED COMPOSITE

Abstract. Resin-bonded bridges (RBB), which are made by the direct method are widely used to restore the integrity of the dentition. There is no common opinion regarding the optimal design of the retention elements of such prosthetics.
 Purpose is to study the influence of the design RBB supporting elements on the mechanical strength of fixing light-cured composite material, reinforced with glass-fiber tape and bulk, to the hard tissues of the teeth in laboratory conditions,.
 Materials and methods. The study was conducted on 20 laboratory samples. Extracted intact lower third molars were sprayed into halves in a transverse direction on two fragments. Each of the fragments was fixed in fast-hardening plastic so that the contact surface of the fragment of the removed tooth stood 2 mm above the plastic level, with the surface of the enamel, which was a circle, with a diameter of 4-5 mm, and was free. Samples were divided into 2 groups of 10 in each. In samples of group I, the preparation of an approximate surface of a tooth fragment was made in the form of a box-shaped cavity with rounded corners and a minimal conicality of vertical walls with the following parameters: length - 3 mm, width - 3 mm, depth - 2 mm. Reference cavities in the samples of the second group were prepared according to the proposed method, after preparation of the classical box-shaped cavity with parameters: length - 3 mm, width - 3 mm, depth - 2 mm, created additional retention elements in the form of dives located in the lower third each of the vertical walls of the cavities using special marking burs with height and thickness of the working part by 1 mm.
 In order to determine the strength of the light-cured composite fixation, reinforced by glass-fiber tape and bulk, developed device for investigating the maximum destructive loading of the samples by the shear method was used. The destructive load was measured using a dynamometer installed in the test vehicle to within 0.1 N. In addition, the specific strength of the samples was determined as the ratio of the destructive load to the surface area of the fracture or separation, and the safety margin, as the ratio of the destructive load to the mean the value of the chewing load in the area of molars taken for 150 N.
 Results and discussion. During conducting ofd the laboratory study of fixation strength of light-cured composite, reinforced by glass-fiber tape and bulk, to solid teeth tissues with different design retention elements there were found that the maximum destructive load and specific strength of the different sample groups were significantly different (p <0,01). Indicators of destructive loading of samples of the 1st group were ranged from 576.5 N to 835.9 N and amounted to an average of 771.8+90.1 N. At the same time, the destructive loading for samples of the II group was from 2425.0 N to 2999.0 N with an average of 2805.9+191.4 N. Thus, the samples of the second group had almost 4 times the magnitude of the maximum destructive load than the values of group І samples.
 The indexes of the specific strength of light-cured composite fixing to the hard tissues of the supporting teeth were also higher in the samples of the second group, their values were ​​ranged from 341.1 N / mm2 to 421.8 N / mm2 with an average value of 394.5+26.8 N/mm2. In samples from Group I, these figures were ranged from 23.1 N/mm2 to 33.4 N/mm2 and amounted to 28.6+3.3 N/mm2 on average, they were 14 times smaller than II group indicators.
 Conclusion. As a result of the laboratory study, it was found that samples of the second group with the proposed design of retention elements had higher characteristics of the strength of fixation to the hard teeth tissues than those of group I with the "classic" box-shaped form of retention cavities. Destruction of samples of the second group occurred at a significant load that greatly exceeded that which occured in clinical conditions and at a distance from the retention elements, created according to the proposed design, due to insufficient physical and mechanical parameters of the light-cured composite and reinforcing fiberglass elements. The use of the proposed preparation option will reduce the risk of failure of the fixation and improve the prognosis for the long-term exploitation of resin-bonded bridges made by direct method.