Journal of Esthetic and Restorative Dentistry最新文献

{"title":"The Effect of Preformed Anatomic Provisional Restorations on Peri-Implant Mucosal Dimensions with Immediate Tooth Replacement Therapy.","authors":"Hanae Saito, Seung Jun Song, Jamie Rubin, Dennis P Tarnow, Stephen J Chu","doi":"10.1111/jerd.13334","DOIUrl":"https://doi.org/10.1111/jerd.13334","url":null,"abstract":"<p><strong>Objective: </strong>Immediate Tooth Replacement Therapy (ITRT) has become popular due to its ability to reduce treatment time and provide immediate esthetic results. However, long-term challenges, such as mid-facial recession and labial bone resorption, have been reported. Anatomic temporary cylinders (ATC), which allow for efficient fabrication of provisional transitional restorations in the esthetic zone, were designed to mimic the natural emergence profile and guide mucosal tissue healing. This study examines the effect of ATCs on the fabrication of provisional restorations compared to conventional non-anatomic temporary cylinders (CTCs) in terms of peri-implant mucosal preservation and stability in patients undergoing ITRT using the dual-zone grafting technique.</p><p><strong>Materials and methods: </strong>Parameters evaluated were peri-implant mucosal tissue thickness (PIMTT), Pink Esthetic Score (PES), and radiographic outcomes, including labial plate dimension (LPD).</p><p><strong>Results: </strong>The use of ATCs resulted in a statistically significant increase in PIMTT compared to CTCs, suggesting better preservation of peri-implant mucosal architecture. Additionally, the ATC group exhibited a positive change in LPD, although this difference was not clinically significant.</p><p><strong>Conclusions: </strong>The findings indicate that ATCs may offer advantages in maintaining peri-implant mucosal stability, contributing to the esthetic and functional outcomes of implant-supported restorations. Further long-term studies are needed to validate these preliminary results.</p><p><strong>Clinical significance: </strong>The use of anatomic temporary cylinders (ATC) in immediate tooth replacement therapy (ITRT) demonstrated improved peri-implant mucosal tissue thickness, suggesting enhanced maintenance of peri-implant mucosal architecture. This can contribute to healthier and more esthetic outcomes while potentially reducing the risk of complications such as mid-facial recession.</p>","PeriodicalId":15988,"journal":{"name":"Journal of Esthetic and Restorative Dentistry","volume":null,"pages":null},"PeriodicalIF":3.2,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142545853","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Soft Tissue Changes at the Pontic Sites of Cantilever Zirconia Ceramic Resin-Bonded Fixed Dental Protheses in the Esthetic Zone: A Clinical Observational Study.","authors":"Lisa Türp, Theresia Schlothauer, Christine Yazigi, Matthias Kern","doi":"10.1111/jerd.13350","DOIUrl":"https://doi.org/10.1111/jerd.13350","url":null,"abstract":"<p><strong>Objective: </strong>Data on the stability of soft tissues at pontic sites of resin-bonded fixed dental protheses (RBFDP) are lacking. The purpose of this study was to evaluate soft tissue changes at pontic sites of cantilever zirconia ceramic RBFDPs with and without surgical pretreatment after different follow-up periods in the esthetic zone.</p><p><strong>Materials and methods: </strong>Impressions were taken after the insertion of the restorations and an intraoral scan was performed at follow-up examinations. Dental casts were digitalized and superimposed with the follow-up scan. Vertical and horizontal soft tissue changes were measured buccally and lingually at mucosal margin at the central cross-section of each pontic, and for horizontal change at 1 and 2 mm below. One-way ANOVA and Kruskal-Wallis test were performed to analyze the collected data.</p><p><strong>Results: </strong>A total of 36 pontic sites with (n = 7) and without surgical pretreatment (n = 29) were evaluated at a follow-up period of either > 4, > 6, or > 10 years (n = 12). The follow-up period had no significant effect on the tissue change. Surgical pretreatment showed significantly higher tissue loss at 2 mm below the lingual mucosal margin than for sites without surgical pretreatment.</p><p><strong>Conclusions: </strong>Soft tissues at pontic sites remained stable with a tissue gain at the mucosal margin up to 10 years.</p><p><strong>Clinical significance: </strong>Based on the findings of this study, cantilever resin-bonded fixed dental protheses provide excellent functional and esthetic outcomes with preservation of soft tissues in the edentulous area of single missing incisors and a gingival sulcus-like tissue growth at the mucosal margin forming an emergence profile at pontic sites similar to that of a natural tooth.</p>","PeriodicalId":15988,"journal":{"name":"Journal of Esthetic and Restorative Dentistry","volume":null,"pages":null},"PeriodicalIF":3.2,"publicationDate":"2024-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142502003","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Clinical Outcomes of Bulk-Fill Resin Composite Restorations: A 10-Year Mapping Review and Evidence Gap Map.","authors":"Anna Júlia Oliveira de Menezes, Lucas do Nascimento Barbosa, Juan Vitor Costa Leite, Laryssa Mylenna Madruga Barbosa, Robinsom Viégas Montenegro, Raquel Venâncio Fernandes Dantas, Grace Mendonça de Souza, Ana Karina Maciel de Andrade, Renally Bezerra Wanderley Lima","doi":"10.1111/jerd.13339","DOIUrl":"https://doi.org/10.1111/jerd.13339","url":null,"abstract":"<p><strong>Objective: </strong>To map the evidence regarding the clinical performance of posterior restorations with bulk-fill resin composites and identify research gaps.</p><p><strong>Materials and methods: </strong>This mapping review was conducted following PRISMA-ScR guidelines for scoping reviews, and its protocol was registered on the Open Science Framework platform. Systematic searches were conducted, considering studies published between 2013 and February 2024 in the PubMed, Embase, and Cochrane databases. Clinical studies investigating the performance of bulk-fill resin composite restorations in class I and/or class II preparations with increments of 4 to 5 mm were included.</p><p><strong>Results: </strong>A total of 147 articles were identified, and based on the eligibility criteria, 26 studies were selected for descriptive analysis. Of the reviewed studies, 73% (n = 19) investigated high-viscosity bulk-fill composites, while 30% (n = 8) focused on low-viscosity bulk-fill composites. Evaluation periods ranged from 1 week to 10 years. Reported annual failure rates varied from 0% to 3%, with survival rates between 78.9% and 100%.</p><p><strong>Conclusions: </strong>Bulk-fill resin composites of high viscosity were the most analyzed in the published studies, with evaluation periods of up to 10 years. The review of available scientific evidence showed clinically acceptable performance for composite bulk-fill restorations, with high survival rates and minimal annual failure rates. There is a need for long-term clinical studies on bulk-fill resin composites.</p><p><strong>Clinical significance: </strong>This review demonstrates that both high and low-viscosity bulk-fill resin composites exhibit satisfactory clinical performance, which can help clinicians optimize chairside time. However, it is important to highlight the need for further studies with longer follow-up periods.</p>","PeriodicalId":15988,"journal":{"name":"Journal of Esthetic and Restorative Dentistry","volume":null,"pages":null},"PeriodicalIF":3.2,"publicationDate":"2024-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142501997","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Papilla Access Tunnel Combined With the Laterally Closed Tunnel: A Technique for Treatment of Deep Gingival Recession in the Anterior Mandible.","authors":"Edward P Allen, Kevin G Murphy, Anton Sculean","doi":"10.1111/jerd.13324","DOIUrl":"https://doi.org/10.1111/jerd.13324","url":null,"abstract":"<p><strong>Objective: </strong>Treatment of gingival recession in the anterior mandible is more complex due to unique anatomic features including excessive tension due to frenal and muscle attachments, thin tissue, shallow vestibule, and narrow interdental space. These features are particularly limiting in the presence of deep recession and negatively impact the success most routine soft tissue grafting procedures. The recently proposed laterally closed tunnel combined the benefit of tension management from tunneling rather than incising papillae with lateral closure of deep recession to minimize the need for coronal advancement.</p><p><strong>Clinical considerations: </strong>This is an effective, although technically demanding procedure. This report presents a method of facilitating tunnel preparation by utilizing superficial papillary access incisions bilaterally in the papilla between the lateral incisor and canine. This papilla has the least tension and most robust interdental volume and blood supply. This incision creates a mini flap that facilitates tunnel dissection and graft placement.</p><p><strong>Conclusion: </strong>Because the mini flap is used for graft insertion, the suturing for lateral closure can be performed before graft insertion. The result is reduced technical difficulty.</p>","PeriodicalId":15988,"journal":{"name":"Journal of Esthetic and Restorative Dentistry","volume":null,"pages":null},"PeriodicalIF":3.2,"publicationDate":"2024-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142502002","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Monolithic Hybrid Abutment Crowns (Screw-Retained) Versus Monolithic Hybrid Abutments With Monolithic Crowns (Adhesively Cemented): Three-Year Data of a Prospective Clinical Split-Mouth Study.","authors":"Michael Naumann, Arndt Happe, Agnes Holtkamp, Sarah M Blender","doi":"10.1111/jerd.13335","DOIUrl":"https://doi.org/10.1111/jerd.13335","url":null,"abstract":"<p><strong>Objectives: </strong>This study compares the restoration of single-tooth implants with screw-retained lithium-disilicate hybrid-abutment crowns and single-tooth lithium-disilicate crowns adhesively bonded to hybrid abutments with regard to objective clinical and subjective patient-specific evaluation criteria over a time of observation of 3 years.</p><p><strong>Materials and methods: </strong>Two bone-level implants were placed in contralateral sides of the same jaw in 10 patients, each with two single-tooth gaps. After osseointegration, implants were uncovered and an impression was taken. In accordance with the split-mouth design, one implant in each patient was restored with a screw-retained hybrid abutment crown and the other implant with a hybrid abutment and an adhesively bonded single-tooth crown. The restorations were randomly allocated to the implants. Prefabricated titanium bases were used. The ceramic abutments and restorations were fabricated monolithically with pressed lithium-disilicate ceramic. An objective evaluation (survival, technical, or biological complications, FIPS) by the practitioner and a subjective evaluation (satisfaction, OHIP) by the patient were carried out after 3, 6, 12, 24, and 36 months after restoration placement.</p><p><strong>Results: </strong>Both restoration types showed a survival rate of 100% after 3 years of observation. No technical or biological complications occurred. No significant difference was observed between the two types of restoration neither for objective (survival, technical or biological complications, FIPS) nor subjective (satisfaction, OHIP) evaluation criteria (p > 0.05).</p><p><strong>Conclusion: </strong>No statistically significant differences were observed between screw-retained and cemented pressed lithium-disilicate restorations on bone-level implants for both objective and subjective evaluation criteria, respectively.</p><p><strong>Clinical significance: </strong>Monolithic hybrid-abutment crowns (screw-retained) and monolithic hybrid abutments with single-tooth crowns (cemented) made of pressed lithium disilicate can be used to successfully restore single implants.</p>","PeriodicalId":15988,"journal":{"name":"Journal of Esthetic and Restorative Dentistry","volume":null,"pages":null},"PeriodicalIF":3.2,"publicationDate":"2024-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142502000","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Color Ranges and Distribution of Human Teeth: A Prospective Clinical Study.","authors":"R Ghinea, L J Herrera, J Ruiz-López, M M Sly, R D Paravina","doi":"10.1111/jerd.13344","DOIUrl":"https://doi.org/10.1111/jerd.13344","url":null,"abstract":"<p><strong>Introduction: </strong>This study investigated the in vivo color range of human teeth using a research-grade noncontact spectroradiometer, analyzing the effects of gender, age, ethnicity, and lifestyle factors, including diet, smoking, and oral hygiene.</p><p><strong>Materials and methods: </strong>A total of 1004 participants were recruited at two research sites and stratified by gender, age, and ethnicity, and data on their dietary and oral habits were collected. Noninvasive color measurements of an upper central incisor were performed using a spectroradiometer and a fiber-coupled Xe-Arc light source. Color differences were computed using the CIELAB and CIEDE2000 color difference formulas, statistically analyzed, and interpreted through comparisons with 50:50% perceptibility (PT) and acceptability (AT) thresholds for dentistry.</p><p><strong>Results: </strong>CIELAB and CIEDE2000 color coordinate values varied significantly. Female teeth appeared lighter and less yellow than men's. Age correlated with darker, more chromatic teeth, stabilizing only after Age 46. Significant ethnic differences were observed, particularly between African-American and Asian participants. Coffee consumption impacted teeth yellowness and chromaticity, while tea had no significant effect. Frequent tooth brushing led to lighter teeth, and tooth whitening considerably influenced color, emphasizing the effect of cosmetic dental treatments. Smoking showed minimal impact, with slight discoloration noted among light smokers compared to nonsmokers.</p><p><strong>Conclusions: </strong>Color coordinate values by gender, age, and ethnicity exhibited statistically significant differences and, in most cases, noticeable color differences. With exceptions, the dietary/oral habits of the patient had a significant impact on the color of human teeth.</p><p><strong>Clinical significance: </strong>The findings from this study provide detailed information and understanding of the color range and distribution of human teeth, which can help enhance the esthetic outcome of dental care and, consequently, the patient's satisfaction.</p>","PeriodicalId":15988,"journal":{"name":"Journal of Esthetic and Restorative Dentistry","volume":null,"pages":null},"PeriodicalIF":3.2,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142501998","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Which Whitening Mouthwash With Different Ingredients Is More Effective on Color and Bond Strength of Enamel?","authors":"Elif Varli Tekingur, Fatih Bedir, Muhammet Karadas, Rahime Zeynep Erdem","doi":"10.1111/jerd.13349","DOIUrl":"https://doi.org/10.1111/jerd.13349","url":null,"abstract":"<p><strong>Objective: </strong>To examine the effects of six whitening mouthwashes on tooth color and immediate bond strength to the enamel.</p><p><strong>Materials and methods: </strong>Human incisors were divided into seven groups (n = 10) according to mouthwashes (R.O.C.S Black Edition White, Splat White Plus, Colgate Plax White Charcoal, Signal White Now, Listerine Advanced White, Colgate Optic White, and distilled water). After the initial color measurements, the teeth were exposed to mouthwash for 4 weeks. Then, the color measurements were repeated. Then, cylindrical composite resin blocks were immediately applied to the enamel surfaces and subjected to shear bond strength tests. Data were analyzed using Kruskal-Wallis and Bonferroni tests (α = 0.05).</p><p><strong>Results: </strong>Δ𝑏, Δ𝐿, and ΔE₀₀ values did not present significant differences among the groups. Significant differences among the groups were determined for Δ𝑎 and ΔWI_D values (p < 0.05). R.O.C.S Black Edition White and Splat White Plus produced clinically acceptable color changes. Signal White Now, Splat White Plus, and Listerine Advanced White created acceptable whiteness changes. The mouthwashes did not statistically affect the bond strength compared to the distilled water (p > 0.05).</p><p><strong>Conclusions: </strong>Whitening mouthwash containing blue covarine revealed more acceptable color and whitening changes. Mouthwash containing charcoal led to the lowest enamel bond strength values.</p><p><strong>Clinical significance: </strong>The content of whitening mouthwashes affected the degree of tooth whitening and shear bond strength to enamel.</p>","PeriodicalId":15988,"journal":{"name":"Journal of Esthetic and Restorative Dentistry","volume":null,"pages":null},"PeriodicalIF":3.2,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142502004","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Nonthermal Atmospheric Plasma Promotes Bonding Between Adhesive Monomers and Zirconia.","authors":"Xiaolan Chen, Chengcheng Yu, Lei Hua, Qi Liu","doi":"10.1111/jerd.13338","DOIUrl":"https://doi.org/10.1111/jerd.13338","url":null,"abstract":"<p><strong>Objective: </strong>To investigate whether nonthermal atmospheric plasma (NTAP) can promote bonding between commonly used adhesive monomers and zirconia.</p><p><strong>Materials and methods: </strong>The zirconia surface and monomers (HEMA, BisGMA, TEGDMA, and MDP) were treated with different NTAP approaches (10 w, 30 s), and the surface characteristics and chemical structures between the zirconia surface and monomers were verified by the contact angle, scanning electron microscopy (SEM), attenuated total reflectance Fourier transform infrared (ATR/FT-IR) spectroscopy, and x-ray photoelectron spectroscopy (XPS). Scotchbond Universal adhesive with two different resin cements, RelyX Ultimate and RelyX Unicem 2, was applied, followed by NTAP-aided clinical procedures, and then microtensile bond strength test (μTBS) and failure mode evaluation were tested for preliminary mechanical properties assessment. One-way ANOVA was employed for the statistical analysis.</p><p><strong>Results: </strong>The contact angle analysis, SEM, and ATR-FTIR confirmed that NTAP can promote the polymerization of BisGMA, TEGDMA, and MDP on the zirconia surface, while XPS confirmed that NTAP can induce a chemical reaction between MDP and zirconia.</p><p><strong>Conclusions: </strong>Nonthermal atmospheric plasma can increase the affinity between selected monomers and zirconia and promote the chemical bonding strength between phosphate monomers and zirconia; besides, it can enhance the bonding strength of two different adhesive systems.</p><p><strong>Clinical significance: </strong>The mechanism of how NTAP improved common adhesive monomers interacting with zirconia surfaces was revealed in this study. NTAP, as a relatively high energy-boosting method, could not only improve the surface affinity of zirconia and chemical bonding in-between monomers and zirconia but also enhance the polymerization of different monomers onto zirconia, resulting in improved bonding properties. Thus, further exploration of versatile bonding materials and/or onto different dental substrates could take this into account.</p>","PeriodicalId":15988,"journal":{"name":"Journal of Esthetic and Restorative Dentistry","volume":null,"pages":null},"PeriodicalIF":3.2,"publicationDate":"2024-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142502001","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evolution of the Guided Direct Composite Resin Technique in Restorative Dentistry: A Systematic Review.","authors":"Taina Tolotti, Newton Sesma, Eduardo Mukai","doi":"10.1111/jerd.13329","DOIUrl":"https://doi.org/10.1111/jerd.13329","url":null,"abstract":"<p><strong>Objective: </strong>This systematic review aims to understand the limitations and benefits of the guided direct restorative technique, to optimize the final outcomes, considering the evolution from analog to digital, including planning, the diversification of guides, and the different resins employed.</p><p><strong>Methodology: </strong>A search was conducted in the electronic databases PubMed, Cochrane, and through manual searches, initiated in May 2023 and updated in April 2024. The following search strategy was used: ((injectable composite resin) OR (direct pressed composite)) OR (3D-guided), utilizing the PICO framework.</p><p><strong>Results: </strong>Initially, 739 articles were retrieved. After applying inclusion and exclusion criteria, 33 studies were considered suitable for data extraction, including 12 in vitro studies and 21 case reports or technique descriptions. The articles focused on comparisons of techniques, flowable, heated, and conventional resins, as well as various technique reports with variations in guides, materials, and planning, potentially aiding clinicians in more effective and safer execution of this restorative technique.</p><p><strong>Conclusion: </strong>The utilization of digital workflows presents greater solutions to the challenges of the guided direct restorative technique. Understanding the properties of the resins used is crucial for the results and should be chosen according to the patient's needs.</p><p><strong>Clinical significance: </strong>A guided direct restorative procedure can deliver previously planned dental treatment based on individualized planning. This method ensures greater reproducibility in aesthetics and occlusion, resulting in superior quality work for the patient.</p>","PeriodicalId":15988,"journal":{"name":"Journal of Esthetic and Restorative Dentistry","volume":null,"pages":null},"PeriodicalIF":3.2,"publicationDate":"2024-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142501999","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dimensions of Posterior Implant Restorations Related to Intra-Coronal Cantilever and Occlusal Forces: An In Vitro Study.","authors":"Panagoula Tzanetou, Stefanos Kourtis, Dimokritos Papalexopoulos, Nikitas Sykaras","doi":"10.1111/jerd.13343","DOIUrl":"https://doi.org/10.1111/jerd.13343","url":null,"abstract":"<p><strong>Objective: </strong>The aim of the present study was to investigate the relation of the implant position to the implant crown and analyze the location and magnitude of bite force.</p><p><strong>Materials and methods: </strong>The dimensions of 49 posterior implant-supported restorations were recorded in terms of: 1. implant diameter, 2. crown length, 3. crown width, 4. crown height, 5. occlusal surface of the restoration. The crown/implant height was measured and the distance between the implant center and the restoration center revealed the size of intra-coronal cantilevers. The occlusal force analysis determined the point and magnitude of loading. Correlation coefficient r was used for the statistical process and statistical control was carried out with the aid of t-test with minimum level of significance p < 0.05.</p><p><strong>Results: </strong>- The mean crown-to-implant ratio was 0.9 and in short implants (< 10mm) the ratio was 1.28. - Intra-coronal cantilever extensions ranged from 2.1 mm to 6.35 mm depending on crown size. - Occlusal loading was identified in cantilever areas of the crown.</p><p><strong>Conclusions: </strong>- Implant center deviates from crown center in 71%-82% of the cases depending on site location. - Implants with non-ideal position may support a functionally occluding crown.</p><p><strong>Clinical significance: </strong>Intra-coronal cantilevers are a critical factor to avoid clinical complications and should be taken under consideration both in the planning and fabrication phase of implant restorations.</p>","PeriodicalId":15988,"journal":{"name":"Journal of Esthetic and Restorative Dentistry","volume":null,"pages":null},"PeriodicalIF":3.2,"publicationDate":"2024-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142467466","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}