Journal of Prosthetic Dentistry最新文献

{"title":"Digital workflow for fabricating an implant-supported overdenture with the custom disk method.","authors":"Anna Miyayasu, Maiko Iwaki, Kouichi Enomoto, Manabu Kanazawa","doi":"10.1016/j.prosdent.2024.08.020","DOIUrl":"https://doi.org/10.1016/j.prosdent.2024.08.020","url":null,"abstract":"<p><p>Although methods have been developed to fabricate complete digital dentures, a digital workflow of fabrication methods for complete dentures with metal frameworks such as implant overdentures has not yet been established. The purpose of this dental technique article was to provide a comprehensive description of implant overdenture fabrication techniques using a digital workflow originally devised by applying the custom disk method. In this method, the custom disk was made of resin and contained prefabricated artificial teeth. Both the denture base and the artificial teeth in the custom disk were milled together. This described technique focuses on a 4-implant-supported overdenture with metal reinforcement for an edentulous maxilla. The aim was to establish a standard that can be widely adopted not only for implant overdentures but also for complete dentures that contain a metal framework. Advantages of this technique include that it enables the application of the custom disk method to the fabrication of implant overdentures with a metal framework as a reinforcement. In this technique, a metal framework is integrated into a resin-based complete denture fabricated by using the custom disk method, providing a better fit of the denture base and precise positioning of the artificial teeth.</p>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":null,"pages":null},"PeriodicalIF":4.3,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142289764","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":"A fully digital planning protocol for dynamic computer-assisted zygomatic implant surgery based on virtual surgery simulation: A dental technique.","authors":"Jinyan Chen, Yihan Shen, Baoxin Tao, Yiqun Wu, Feng Wang","doi":"10.1016/j.prosdent.2024.08.013","DOIUrl":"https://doi.org/10.1016/j.prosdent.2024.08.013","url":null,"abstract":"<p><p>Dynamic navigation-guided zygomatic implant (ZI) surgery has been a preferred option for achieving optimal prosthetic-driven implant placement. However, during the actual surgical procedure, surgical execution may still be hindered by environmental factors such as mouth opening. A fully digital planning protocol is described that integrated the patient's maxillofacial soft tissue information and virtual surgical handpiece with the drills on the implant planning path to ensure the precise, time-saving, and smooth implementation of dynamic navigation-guided ZI surgery.</p>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":null,"pages":null},"PeriodicalIF":4.3,"publicationDate":"2024-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142289761","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":"In vitro effect of anodization on surface roughness and bacterial adhesion to titanium abutments.","authors":"Shaghayegh Golalipour, Ezatollah Jalalian, Sara Koosha, Sotude Khorshidi, Maryam Torshabi, Maryam Sayyari","doi":"10.1016/j.prosdent.2024.08.004","DOIUrl":"https://doi.org/10.1016/j.prosdent.2024.08.004","url":null,"abstract":"<p><strong>Statement of problem: </strong>Titanium abutments are considered the criterion standard for dental implants, yet the gray color poses esthetic concerns. Anodization has been proposed to enhance esthetics, but its effects on surface roughness and bacterial adhesion are unclear.</p><p><strong>Purpose: </strong>The purpose of this in vitro study was to assess the effect of anodization on surface roughness and bacterial adhesion to titanium abutments.</p><p><strong>Material and methods: </strong>Sixteen titanium abutments were divided into test (anodized) and control (nonanodized) groups (n=8). Anodization used 63 V from seven 9 V batteries and an electrolyte of 250 mL distilled water with 1 g trisodium phosphate. Surface roughness was measured with a profilometer at 4 mN force and 0.5 mm/second, assessing 3 supragingival points per specimen. In addition, 1 specimen from each group was selected for field-emission scanning electron microscopy (FE-SEM). Sterilized abutments were exposed to a Staphylococcus aureus suspension (10⁵ CFUs/mL) and then placed in phosphate-buffered saline (PBS), sonicated, vortexed, diluted, and cultured on agar. Bacterial adhesion was assessed after incubating 144 microplates at 37 °C for 24 hours. Colony counts were calculated using a dilution factor and serial dilution, and log 10 of CFUs/mL plotted. Data analysis used the Student t test for bacterial adhesion and the Mann-Whitney U test for surface roughness (α=.05).</p><p><strong>Results: </strong>The test and control groups showed no significant difference in surface roughness (P>.05). However, bacterial adhesion to anodized abutments was significantly lower than that to control abutments (P<.001).</p><p><strong>Conclusions: </strong>Anodization of titanium abutments significantly decreased bacterial adhesion and had no significant effect on surface roughness.</p>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":null,"pages":null},"PeriodicalIF":4.3,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142289767","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":"A digital approach to creating a positioning tray for a multiple implant impression and its clinical application: A dental technique.","authors":"Yu Wei, Jianxiang Tao","doi":"10.1016/j.prosdent.2024.08.016","DOIUrl":"https://doi.org/10.1016/j.prosdent.2024.08.016","url":null,"abstract":"<p><p>A workflow is described for fabricating a custom complete arch implant positioning tray for the impression of multiple implants. In this technique, a complete arch virtual cast with abutments is obtained by intraoral scanning. Details for the tray including extension range, thickness, and impression post perforation sites can be designed from this cast. This positioning tray not only eliminates the conventional complicated manufacturing procedures but can also accurately obtain the positional relationship between implants and the morphology of the alveolar mucosa, saving clinical time.</p>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":null,"pages":null},"PeriodicalIF":4.3,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142289759","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":"Accuracy of a calibration method based on cone beam computed tomography and intraoral scanner data registration for robot-assisted implant placement: An in vitro study.","authors":"Yi Li, Jizhe Lyu, Xunning Cao, Yin Zhou, Jianguo Tan, Xiaoqiang Liu","doi":"10.1016/j.prosdent.2024.08.009","DOIUrl":"https://doi.org/10.1016/j.prosdent.2024.08.009","url":null,"abstract":"<p><strong>Statement of problem: </strong>Robotic systems have shown promise for implant placement because of their accuracy in identifying surgical positions. However, research on the accuracy of patient calibration methods based on cone beam computed tomography (CBCT) and intraoral scanner (IOS) data registration is lacking.</p><p><strong>Purpose: </strong>The purpose of this in vitro study was to develop a calibration method based on the registration of CBCT and IOS data of a robot-assisted system for implant placement, evaluate the accuracy of this calibration method, and explore the accuracy of robot-assisted surgery at different implant positions.</p><p><strong>Material and methods: </strong>Twenty standardized, polyurethane, partially edentulous maxillary typodonts were divided into 2 groups: one group used a calibration method based solely on CBCT data (CBCT group), and the other used a calibration method based on the registration of CBCT and IOS data (IOS group). Four implants were planned for each typodont in the right second premolar, left central incisor, left first premolar, and left second molar positions. The robot performed the osteotomies and implant placement step by step according to the preoperative plan. The operating software program automatically measured the deviation between the planned and actual implant position. Two-way analysis of variance (ANOVA) and the least significant difference (LSD) post hoc test (α=.05) were used to analyze differences between the test groups.</p><p><strong>Results: </strong>The angular deviation and 3-dimensional deviations at implant platform and apex between the 2 calibration methods did not significantly differ among the 4 implant positions (P>.05). The horizontal and depth deviations at the implant platform and apex levels between the 2 calibration methods did not significantly differ among the 4 implant positions (P>.05). In the anterior region (left central incisor), the CBCT group showed higher horizontal deviation at both the implant platform and apex compared with the IOS group (P<.05). Conversely, the IOS group had greater depth deviation at both the implant platform and apex than the CBCT group (P<.05). In the posterior region, with or without distal extension (right second premolar, left first premolar, and left second molar), no statistically significant differences were found between the 2 calibration methods (P>.05).</p><p><strong>Conclusions: </strong>The calibration method that was based on the registration of CBCT and IOS data demonstrated high accuracy. No significant differences in the accuracy of the calibration methods for robot-assisted implant placement were found between the CBCT group and IOS group.</p>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":null,"pages":null},"PeriodicalIF":4.3,"publicationDate":"2024-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142154376","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":"Can nonhazardous postprocessing cleaning solutions enable adequate surface properties for printed dental casts in different resins?","authors":"Gulce Çakmak, Gabriela Panca Sabatini, Marcella Silva de Paula, Ahmet Orgev, Çiğdem Kahveci, Marta Revilla-Léon, Burak Yilmaz","doi":"10.1016/j.prosdent.2024.07.034","DOIUrl":"https://doi.org/10.1016/j.prosdent.2024.07.034","url":null,"abstract":"<p><strong>Statement of problem: </strong>Printed casts and dental devices and prostheses are increasingly being used, and the ecological impact of additive manufacturing should be considered in addition to the fabrication accuracy and surface properties of the printed object. To overcome the ecological drawbacks of alcohol postprocessing, water-washable, 3-dimensionally (3D) printable cast resins and postprocessing cleaning solutions that do not include alcohol have been introduced. However, whether using only water rather than chemical solvents would enable the surface smoothness and hardness required for accurate diagnostic and prosthetic procedures is unknown.</p><p><strong>Purpose: </strong>The purpose of this in vitro study was to evaluate the effect of resin type (water-washable or nonwater washable) and postprocessing cleaning solution on the surface roughness and microhardness of 3D printed dental cast resins.</p><p><strong>Material and methods: </strong>One hundred eight disk-shaped specimens (Ø10×2 mm) were additively manufactured (AM) from 3 dental cast resins: 2 water-washable (Epax (WW1) and Phrozen (WW2)) and 1 nonwater-washable resin (KeyModel Ultra resin-beige (NWW)) with a printer (n=36). Specimens in each resin type were divided into 3 groups for the application of postprocessing cleaning solution (water, 98% isopropyl alcohol [IPA] or methyl ether solvent) and polymerized after cleaning. The surface roughness (R_a, µm) and Vickers microhardness (HV) were measured. Laser microscope images were made of 1 specimen from each group.</p><p><strong>Results: </strong>NWW-IPA (control group) had a similar R_a to WW2-water (P=.81) and WW2-methyl ether solvent (P=.511). NWW-IPA had lower HV than WW2-water (P<.001) and WW1-methyl ether solvent (P=.001). Solutions had no significant effect on the R_a of WW1 (P≥.554) and WW2 (P≥.805). WW1 had higher surface irregularities with water, whereas no significant difference was visually observed with IPA or methyl ether solvent. Solutions had a similar effect on the surface of WW2 when evaluated visually with the laser microscope.</p><p><strong>Conclusions: </strong>Resin type and postprocessing cleaning solution affected the surface roughness and microhardness of 3D printed dental cast resins, except for the surface roughness of tested water-washable resins. Water or methyl ether solvent cleaned water-washable resin (WW2) had surface roughness and hardness similar to commonly used nonwater-washable cast resin.</p>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":null,"pages":null},"PeriodicalIF":4.3,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142145881","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":"Response to Letter to the Editor regarding, \"The application of 3D printing in dentistry: A bibliometric analysis from 2012 to 2023 (J Prosthet Dent. 2024 Jul 1)\".","authors":"Guangwei Chen, Jingkun Zhang, Jianfeng He, Yongqi Li, Chengwei Li, Zhiyan Lin, Huilin Wu, Libin Zhou","doi":"10.1016/j.prosdent.2024.07.041","DOIUrl":"https://doi.org/10.1016/j.prosdent.2024.07.041","url":null,"abstract":"","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":null,"pages":null},"PeriodicalIF":4.3,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142145884","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":"Evaluation of adherence of Candida albicans to differently manufactured acrylic resin denture base materials.","authors":"William Emory Linder, Wendy Auclair Clark, Roland Arnold, Ingeborg De Kok, David A Felton","doi":"10.1016/j.prosdent.2024.07.040","DOIUrl":"https://doi.org/10.1016/j.prosdent.2024.07.040","url":null,"abstract":"<p><strong>Statement of problem: </strong>Though computer-aided design and computer-aided manufactured (CAD-CAM) denture bases have become popular, evidence on the ability of C. albicans cells to adhere to these denture bases is lacking.</p><p><strong>Purpose: </strong>The purpose of this in vitro study was to evaluate the adherence of Candida albicans to differently manufactured acrylic resin denture bases.</p><p><strong>Material and methods: </strong>Acrylic resin disks were fabricated using a total of 6 different fabrication methods (compression molding, injection molding, CAD-CAM milling, and rapid prototyping on 3 different printers with 3 different resins). Each material was evaluated for adherence of C. albicans using 2 different experimental methods - suspension in inoculated tryptic soy broth (TSB) or placed onto a uniform lawn of C. albicans on tryptone soya agar (TSA) with 5% sheep's blood. Attached cells were quantified by spiral plating and then used to re-inoculate sterile plates. Logarithmic transformation was completed to normalize data. For the broth suspension, the Kruskal-Wallis test was used to identify any differences between the 6 specimen types in terms of recovery, and the Dunn test was used for post hoc analysis. For the microbial lawn experiment, 1-way analysis of variance (ANOVA) and then the Tukey Honestly Significant Difference (HSD) post hoc test were used.</p><p><strong>Results: </strong>Statistically significant differences were found between the numbers of adherent cells based on manufacturing method and between experimental designs (P<.05). All resins demonstrated growth with re-inoculation.</p><p><strong>Conclusions: </strong>Though statistical significance was noted, neither experimental technique demonstrated what is likely a clinically significant preferential binding to any particular resin surface. Attached Candida cells are effective carriers of pathogens to uninfected surfaces. Further studies are indicated for potential virulence factors and differences in printed resins.</p>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":null,"pages":null},"PeriodicalIF":4.3,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142145882","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 anterior occlusion, arch dimension, and mandibular movement during speech articulation: A three-dimensional analysis.","authors":"Taseef Hasan Farook, Lameesa Ramees, James Dudley","doi":"10.1016/j.prosdent.2024.08.001","DOIUrl":"https://doi.org/10.1016/j.prosdent.2024.08.001","url":null,"abstract":"<p><strong>Statement of problem: </strong>Studies correlating occlusal morphology from 3-dimensional intraoral scans with both soft and hard tissue dynamic landmark tracking within the same participant population are lacking.</p><p><strong>Purpose: </strong>The purpose of this clinical study was to use 3-dimensional intraoral scanning, computer-aided design, electrognathography, and artificial intelligence to investigate the relationships between anterior occlusion and arch parameters with hard and soft tissue displacements during speech production.</p><p><strong>Material and methods: </strong>An artificial intelligence (AI) driven software program and electrognathography was used to record the phonetic activities in 62 participants for soft tissue (ST) and hard tissue (HT) displacement. Soft tissue displacement was quantified by the mean difference between subnasale and soft tissue pogonion peaks during phonetic expressions, and hard tissue displacement was directly measured with an electrognathograph. Intercanine and intermolar distances, arch perimeters, and horizontal and vertical overlap were measured from the intraoral scan data.</p><p><strong>Results: </strong>ST and HT displacements were successfully estimated for fricative (ST=7.16 ±4.51 mm, HT=11.86 ±4.02 mm), sibilant (ST=5.11 ±3.49 mm, HT=8.24 ±3.31 mm), linguodental (ST=5.72 ±4.46 mm, HT=10.01 ±3.16 mm), and bilabial (ST=5.56 ±4.64 mm, HT=11.69 ±4.28 mm) phonetics. Vertical overlap correlated positively with hard tissue movement during all speech expressions except bilabial phonetics (ρ=.30 to.41, P<.05). Maxillary and mandibular arch perimeters showed negative correlations with soft tissue displacement during linguodental and bilabial speech (ρ=-.25 to -.41, P<.05) but were significantly correlated with hard tissue movement during all speech assessments (ρ=-.28 to -.44, P<.05). Maxillary intermolar distances negatively correlated with hard tissue phonetic expressions (ρ=-.24 to -.30, P<.05). Participant age positively correlated with soft tissue displacement during all speech patterns (ρ=.28 to.33, P<.05) and with weight increase (ρ=.27, P=.033), and hard tissue displacement (ρ=.25, P=.048) during maximum mouth opening significantly correlated with linguodental phonetics.</p><p><strong>Conclusions: </strong>Within the study population, vertical overlap, maxillary intermolar distance, and dental arch perimeters correlated significantly with mandibular displacement during phonetic expression.</p>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":null,"pages":null},"PeriodicalIF":4.3,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142145883","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":"Fixed prosthodontic rehabilitation using a facially driven fully digital workflow of a patient with syndromic amelogenesis imperfecta associated with a rare form of ectodermal dysplasia, tricho-dento-osseous (TDO) syndrome.","authors":"Naif Sinada, Christina I Wang","doi":"10.1016/j.prosdent.2024.07.030","DOIUrl":"https://doi.org/10.1016/j.prosdent.2024.07.030","url":null,"abstract":"<p><p>Tricho-dento-ossseous (TDO) syndrome is a rare form of ectodermal dysplasia (ED) characterized by defects in the hair, bones, nails, and teeth. Dental findings consistently seen in patients with TDO syndrome include amelogenesis imperfecta and taurodontism, but additional findings such as periapical abscesses, mandibular prognathism, and impacted teeth have been reported. Because of the rarity of this disorder, the prevalence is unknown and limited research is available regarding its dental management. This clinical report describes the fixed prosthodontic implant rehabilitation of an adult patient with TDO syndrome by using a facially driven fully digital workflow. The facially driven digital workflow streamlined the rehabilitation and allowed for functional, esthetic, and psychosocial improvements in a timely manner.</p>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":null,"pages":null},"PeriodicalIF":4.3,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142140381","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}