Journal of Prosthodontics-Implant Esthetic and Reconstructive Dentistry最新文献

{"title":"Influence of shoulder margin and feather-edge incisal preparations on the marginal and internal adaptation of laminate veneers fabricated with three manufacturing techniques.","authors":"Ahmed M Aziz, Nadia Khalifa, Hiba Alshaibah, Adam Bin Husein","doi":"10.1111/jopr.14047","DOIUrl":"https://doi.org/10.1111/jopr.14047","url":null,"abstract":"<p><strong>Purpose: </strong>To compare the marginal and internal adaptation of shoulder margin and feather-edge 3D-printed veneers with milled zirconia and pressed lithium disilicate laminate veneers.</p><p><strong>Materials and methods: </strong>Veneer preparations were made on the right and left maxillary incisors using shoulder margin and feather-edge designs. The preparations were scanned to create the reference standard tessellation language (STL) file. Ninety laminate veneers were fabricated for each preparation design using 3D-VS (3D-printing Varseosmile), M-Zr (milled zirconia), and P-LD (pressed lithium disilicate). All veneers were digitized to generate test STL files, which were then used to measure 3D deviations from the reference file with a 3D software program. Marginal and internal adaptation, as well as trueness, were assessed. Color maps were produced to quantify the mean ± standard deviation of the 3D deviations between the reference and test STL files.</p><p><strong>Results: </strong>The marginal discrepancy was significantly higher in the feather-edge design than in the shoulder margin design across all groups (p < 0.001). M-Zr exhibited the best marginal adaptation in all four measured areas: cervical (30.2±4.02 µm), mesial (15.8±2.97 µm), distal (16.7±3.23 µm), and incisal (20.6±2.36 µm) for shoulder margin design. For feather-edge designs, M-Zr excelled in all areas: cervical (29.5±2.71 µm), mesial (15.8±2.97 µm), distal (17.2±2.65 µm), and incisal (45.3±3.97 µm). Statistically significant differences in internal adaptation were found among the 3 groups (p < 0.001). M-Zr demonstrated the best internal adaptation in the cervical third (shoulder margin: 25.3±1.49 µm, feather-edge: 19.2±3.52 µm) and middle third (shoulder margin: 14.3±3.09 µm; feather-edge: 14.1±2.31 µm). Trueness of M-Zr was better than that of other groups (p < 0.001) (shoulder margin: 17.4±1.74 µm; feather-edge 20.4±1.33 µm).</p><p><strong>Conclusions: </strong>M-Zr veneers had the best marginal and internal adaptation of the fabrication methods and materials tested. Shoulder margin design consistently exhibited better fit across all three materials. The marginal and internal adaptations for the three materials were within the acceptable clinical range.</p>","PeriodicalId":49152,"journal":{"name":"Journal of Prosthodontics-Implant Esthetic and Reconstructive Dentistry","volume":" ","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143711797","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Retrieving a \"frozen\" over-torqued altered dental implant healing abutment: A dental technique.","authors":"Amin Nasehi, Kenneth S Kurtz, Delgado-Ruiz Rafael, Patricia H Swanson","doi":"10.1111/jopr.14045","DOIUrl":"https://doi.org/10.1111/jopr.14045","url":null,"abstract":"<p><p>This report describes a method for retrieval of an over-torqued and altered dental healing abutment using a conservative approach with readily available armamentarium. The previously unretrievable prosthetic component had been modified to support an implant crown prosthesis which required replacement. Conventional reverse torque using a prosthetic driver was unsuccessful in removal of the abutment due to damage within the prosthetic channel of the healing abutment. The approach outlined utilized an off-label use of refrigerant spray and #13 Ash extraction forceps for application of reverse torque onto the abutment. The result was a conservative solution for management of an over-torqued and damaged healing abutment using readily available armamentarium.</p>","PeriodicalId":49152,"journal":{"name":"Journal of Prosthodontics-Implant Esthetic and Reconstructive Dentistry","volume":" ","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143665129","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of autoclave sterilization on the dimensional stability of implant surgical guides: A 3D in vitro analysis.","authors":"Lucio Lo Russo, Pierluigi Mariani, Carlo Ercoli, Giusy Caprio, Ji-Man Park, Luigi Laino, Fariba Esperouz","doi":"10.1111/jopr.14049","DOIUrl":"https://doi.org/10.1111/jopr.14049","url":null,"abstract":"<p><strong>Purpose: </strong>Surgical guides are medical devices used in static implant surgery to replicate the prosthetic and surgical implant position planned with computer-assisted software before surgery. Their use reduces invasiveness and improves safety and outcomes of implant surgery, provided that their accuracy is ensured from design to manufacturing and then to clinical usage. One of the factors that may potentially interfere with their accuracy is the sterilization procedure. The present study aimed to analyze how autoclave sterilization affects 3D-printed surgical guide stability.</p><p><strong>Materials and methods: </strong>Ten 3D-printed surgical guides were scanned before (T0) and after (T1) autoclave sterilization. T0 and T1 scans were compared with the corresponding CAD model in a surface matching software program. Trueness of the intaglio surface, linear and axial deviations of sleeves' housings at T0 and T1 were measured and statistically analyzed by generalized estimated equation (GEE) models to evaluate the effects of the sterilization procedure.</p><p><strong>Results: </strong>Surface variations, linear and axial deviations of sleeves' housings were found to be significantly (p < 0.05) affected by the sterilization only in combination with the volume or the total surface area of the surgical guides. The magnitude of the T0-T1 differences was small (0.016 mm and 0.035 mm for mean absolute deviation (MAD) at the intaglio surface in contact with teeth or mucosa; 0.009 mm for linear deviation of the central point of sleeves' housings; 0.084° and 0.180° for their axial deviation on the sagittal and frontal planes).</p><p><strong>Conclusion: </strong>The effects of autoclave sterilization on the stability of 3D-printed surgical guides remain limited and clinically insignificant.</p>","PeriodicalId":49152,"journal":{"name":"Journal of Prosthodontics-Implant Esthetic and Reconstructive Dentistry","volume":" ","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143651575","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"What occlusal scheme should be used for tooth-supported fixed partial dentures?","authors":"Charles Goodacre, Gary Goldstein","doi":"10.1111/jopr.14048","DOIUrl":"https://doi.org/10.1111/jopr.14048","url":null,"abstract":"&lt;p&gt;&lt;strong&gt;Purpose: &lt;/strong&gt;The purpose of this review of occlusion for fixed partial dentures (FPD) placed on natural teeth was to determine the level of scientific evidence available regarding the occlusal scheme during eccentric mandibular movements and the scheme for occlusal contact in the maximal intercuspal position (MIP).&lt;/p&gt;&lt;p&gt;&lt;strong&gt;Materials and methods: &lt;/strong&gt;A PubMed search of \"natural teeth, dental occlusion, fixed partial dentures, bridges\" using the filters: Case Reports, Clinical Trial, Randomized Controlled Trial, Systematic Review resulted in 7 citations, none of which were relevant. Two were on complete dentures, 2 on implants, and 1 on removable partial dentures. As a result of the literature search and review, it was determined there is a lack of compelling evidence to support a specific eccentric occlusal relationship, tooth form, or how opposing teeth interdigitate, necessitating a look back at First Principles.&lt;/p&gt;&lt;p&gt;&lt;strong&gt;Results: &lt;/strong&gt;Three natural dentition eccentric occlusal relationships have been described in the dental literature: canine protected articulation (CPA), group function (GF), and balanced occlusion. There are no clinical trials focused on the differences between occlusal schemes for occlusal rehabilitation of natural teeth using FPDs. Most clinical studies of natural dentitions determined that GF occurs more commonly than CPA but there is a lack of data supporting the superiority of either of these two eccentric occlusal relationships. There were no clinical studies on occlusal contact schemes with FPDs. Two basic intercuspal schemes have been advocated, cusp-to-fossa and cusp-to-marginal ridge. There is no evidence for how many occlusal contacts are necessary for a stable occlusion with some authors having recommended buccalized or lingualized occlusion.&lt;/p&gt;&lt;p&gt;&lt;strong&gt;Conclusions: &lt;/strong&gt;With FPD occlusion involving natural teeth, there is no clinical evidence supporting the superiority of one eccentric occlusal relationship over another. During protrusive movements, guidance by only the incisors without posterior tooth contact is the most common type of relationship and it is more common in Angle's Class Type I occlusions than in Angle Class II and III occlusions. Posterior tooth contact can occur during protrusion, and it is most common in Angle Class III occlusions and least common in Angle Class II occlusions. The canines can make occlusal contact during protrusive movements. Clinicians have used both GF and CPA in the restoration of teeth with FPDs. When restoring one arch the prostheses should harmonize with the patient's existing occlusal scheme if no other pathology exists. Nonworking side (mediotrusive) contacts should not be present on posterior teeth during lateral mandibular movements. In MIP, occlusal forces should be directed along the long axis of teeth. Some clinicians prefer that occlusal forces not be present on inclined surfaces in MIP and have cuspal contact on opposing","PeriodicalId":49152,"journal":{"name":"Journal of Prosthodontics-Implant Esthetic and Reconstructive Dentistry","volume":" ","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143651576","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Relationship between palatal coverage and accuracy of texture perception: A preliminary study using an experimental palatal plate.","authors":"Akinari Daidoji, Yasue Tanaka, Yuki Ito, Hala Al Khalili, Yoshinori Hattori","doi":"10.1111/jopr.14046","DOIUrl":"https://doi.org/10.1111/jopr.14046","url":null,"abstract":"<p><strong>Purpose: </strong>Using an experimental palatal plate, this study aimed to clarify the effect of palatal coverage on the accuracy of texture perception, including thickness discrimination (T_dis), roughness discrimination (R_dis), and roughness detection (R_det), in healthy young individuals.</p><p><strong>Materials and methods: </strong>Thirty-four healthy participants (mean age, 26.3 ± 3.5 years) were enrolled. An experimental palatal plate made from thermoplastic denture resin was used to evaluate texture perception. Thresholds for T_dis, R_dis, and R_det were determined under two conditions: with and without the plate (w/ P and w/o P), using a staircase method. These thresholds were converted into scores for T_dis, R_dis, and R_det.</p><p><strong>Results: </strong>The palatal plate significantly reduced T_dis and R_dis scores, but had no effect on R_det. T_dis scores w/o P were higher than those w/ P (median [Q1-Q3], 4 [2-5] vs. 2 [1-4]; p = 0.0051), indicating reduced T_dis accuracy with the plate. Similarly, R_dis scores w/o P were higher than those w/ P (3 [2-4] vs. 2 [1-3]; p = 0.0029), suggesting reduced roughness discrimination accuracy with the plate. The effects were more pronounced in participants with higher scores in the w/o P condition. No significant differences were observed in R_det scores.</p><p><strong>Conclusion: </strong>Wearing the experimental palatal plate significantly reduced T_dis and R_dis accuracies, particularly in participants with a higher baseline accuracy. These findings suggest that individual texture perception may affect the eating experience of denture wearers, and that texture perception testing could guide prosthodontic treatment strategies.</p>","PeriodicalId":49152,"journal":{"name":"Journal of Prosthodontics-Implant Esthetic and Reconstructive Dentistry","volume":" ","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143598123","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Obtaining full-arch implant scan with smartphone video and deep learning: An in vitro investigation on trueness and precision.","authors":"Junying Li, Zhaozhao Chen, Fei Liu, Berna Saglik, Gusatvo Mendonca, Hom-Lay Wang","doi":"10.1111/jopr.14041","DOIUrl":"https://doi.org/10.1111/jopr.14041","url":null,"abstract":"<p><strong>Purpose: </strong>To investigate the accuracy of complete-arch implant scans generated by a smartphone camera and a deep learning model.</p><p><strong>Materials and methods: </strong>A deep learning model was trained to generate 3D scans from smartphone videos using a maxillary edentulous model with 6 implants and scan bodies (SBs). Three test groups were created: (1) deep learning 3D reconstruction with 1500 training epochs (DL1), (2) deep learning 3D reconstruction with 5000 training epochs (DL2), and (3) scans obtained from an intraoral scanner (IOS). Each method was repeated 10 times, with a desktop scanner scan as the reference. Test scans were aligned to the reference using two methods: (a) aligning all SBs to evaluate the overall fit, and (b) aligning just the first and second SBs to simulate passive fitting test of multiple implant-supported prostheses. Linear deviations from the reference model (trueness) and within each group (precision) were analyzed.</p><p><strong>Results: </strong>For the overall fit, the DL2 group (67.69 ± 33.29 µm) showed significantly better (p < 0.05) mean trueness than the DL1 group (127.82 ± 73.07 µm), and similar trueness to the IOS group (57.42 ± 36.09 µm). However, the DL2 group (98.12 ± 59.85 µm) showed worse (p < 0.05) precision compared to the IOS group (64.54 ± 42.53 µm). In the virtual passive-fitting test, the DL2 group showed similar trueness and accuracy compared to the IOS group.</p><p><strong>Conclusions: </strong>In the in vitro environment, combining smartphone videos with a deep learning model generated full arch implant scans with accuracy similar to an IOS. Although this accuracy is not good enough for clinical application, this approach shows promise as a potential direction for future development in economical full-arch implant scanning.</p>","PeriodicalId":49152,"journal":{"name":"Journal of Prosthodontics-Implant Esthetic and Reconstructive Dentistry","volume":" ","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143587725","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sleep medicine, sleep apnea, and prosthodontics","authors":"Jean C. Wu DDS","doi":"10.1111/jopr.14040","DOIUrl":"10.1111/jopr.14040","url":null,"abstract":"","PeriodicalId":49152,"journal":{"name":"Journal of Prosthodontics-Implant Esthetic and Reconstructive Dentistry","volume":"34 S1","pages":"3"},"PeriodicalIF":3.4,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jopr.14040","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143574304","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Issue Information - Editorial Board","authors":"","doi":"10.1111/jopr.13709","DOIUrl":"https://doi.org/10.1111/jopr.13709","url":null,"abstract":"","PeriodicalId":49152,"journal":{"name":"Journal of Prosthodontics-Implant Esthetic and Reconstructive Dentistry","volume":"34 3","pages":"225-226"},"PeriodicalIF":3.4,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jopr.13709","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143554320","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Factors affecting stability of surgical guides in mandibular unilateral distal extension situation: An in vitro study.","authors":"Esraa A Elnadoury, Yousria S Gaweesh, Shaimaa M Abu El Sadat, Mervat E Abd-Ellah","doi":"10.1111/jopr.14043","DOIUrl":"https://doi.org/10.1111/jopr.14043","url":null,"abstract":"<p><strong>Purpose: </strong>Unilateral tooth-supported guides reported less effective implant placement than bilateral tooth-supported guides. Therefore, this study evaluated the effect of guide design, replaced tooth location, and applied forces on implant deviation and guide stability of mandibular unilateral tooth-supported guides.</p><p><strong>Materials and methods: </strong>Ten epoxy resin models with soft tissue simulated material were used. For each model, three surgical guide designs were generated: a fully extended guide, a guide with two fixation pins, and one with one fixation pin. Two sleeves were incorporated in each guide for mandibular premolar and molar. Forces were applied from the buccal and oral directions (0.1 N, 1 N, 2.5 N, and 5 N). An intraoral scanner captured the resulting surgical guide displacement. Virtual implants were added to each scan (470 virtual implants) to measure their deviation from the original planned position.</p><p><strong>Results: </strong>Surgical guides with two fixation pins showed the least implant vertical deviation (0.38 ± 0.27 mm, p<0.001) and guide deviation (0.52 ± 0.25 mm, p<0.001). Guide design has a small to medium effect size in all the deviation measurements(p<0.001). Force direction has a significantly large effect on implant vertical deviation (η² = 0.15, p<0.001). Force magnitude greatly affects implant angular deviation (η² = 0.34, p<0.001). A larger vertical deviation was detected in the molar implant location (0.59 ± 0.48 mm p<0.001).</p><p><strong>Conclusions: </strong>Incorporating two fixation pins into unilateral tooth-supported guides significantly enhances stability and minimizes implant deviation. However, forces applied during guided surgery and implant location have a substantial impact, exceeding the influence of the guide design.</p>","PeriodicalId":49152,"journal":{"name":"Journal of Prosthodontics-Implant Esthetic and Reconstructive Dentistry","volume":" ","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143558478","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Finite element analysis of primary healing implants with different transmucosal designs.","authors":"Mario Ceddia, Tea Romasco, Luca Comuzzi, Alessandro Cipollina, Adriano Piattelli, Natalia Di Pietro, Bartolomeo Trentadue","doi":"10.1111/jopr.14044","DOIUrl":"https://doi.org/10.1111/jopr.14044","url":null,"abstract":"<p><strong>Purpose: </strong>This study aimed to assess the response of peri-implant tissues, both hard and soft, to mechanical stress when using a primary healing implant (PHI) with two different transmucosal profiles: concave (Model A) and divergent (Model B). The investigation also sought to observe bone modeling under post-extraction conditions.</p><p><strong>Materials and methods: </strong>The methodology involved the creation of a three-dimensional bone model of the first molar region, derived from a computed tomography scan. Subsequently, two implants were inserted into the bone site and subjected to a loading force of 100 N at a 45° angle.</p><p><strong>Results: </strong>The results of stress analysis, using the von Mises criterion, indicated that Model A exhibited a more uniform stress distribution within the soft tissues, registering a maximum value of 75 MPa, in contrast to 126 MPa observed in Model B. Concerning implant stress, the peak value was recorded at the conometric connection zone between the implant and the abutment, measuring 138 MPa for Model B and 125 MPa for Model A. The study specifically analyzed cortical bone stress, which revealed levels of 72 MPa for Model B and 64 MPa for Model A. Additionally, stress distribution in immature bone ranged from 1.3 to 9 MPa for Model A and from 1.5 to 12 MPa for Model B.</p><p><strong>Conclusions: </strong>The finite element method represents a valuable tool for the design and optimization of implant shapes, taking into account occlusal loads and specific anatomical locations. This approach aims to enhance the stimulation of both soft and hard tissues, thereby mitigating the risk of implant failure.</p>","PeriodicalId":49152,"journal":{"name":"Journal of Prosthodontics-Implant Esthetic and Reconstructive Dentistry","volume":" ","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143544070","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}