Journal of Prosthetic Dentistry最新文献

{"title":"Peri-implantitis after 40 years: Evidence, mechanisms, and implications: A mapping review.","authors":"Steven J Sadowsky","doi":"10.1016/j.prosdent.2023.02.008","DOIUrl":"10.1016/j.prosdent.2023.02.008","url":null,"abstract":"<p><strong>Statement of problem: </strong>The high prevalence of peri-implantitis (PI) continues to plague patients and the disease is resistant to present treatment regimens. An analysis of the available research is lacking.</p><p><strong>Purpose: </strong>Given the abundance and diversity of research on the topic of PI, the purpose of this mapping review was to synthesize the literature on the prevention of PI, the histopathology of the disease, the state of present therapeutics, and any emerging treatments.</p><p><strong>Material and methods: </strong>An extensive literature search was undertaken by using the electronic databases of PubMed, Web of Science, and Science Direct. The keyword strings were peri-implantitis, dental implant, risk assessment, histopathology, prosthesis design, and treatment. The filters applied were time interval from 2000 to 2002; language, English.</p><p><strong>Results: </strong>A total of 3635 articles were taken from PubMed, 3686 articles from Web of Science, and 2450 articles from Science Direct. After applying the inclusion and exclusion criteria to the titles and abstracts of selected investigations, 214 studies were retrieved.</p><p><strong>Conclusions: </strong>The evidence reflects a concerning incidence of PI, without a predictable treatment protocol. An in-depth patient risk assessment considering risk modification, emphasis on surgical and restorative expertise, and strict recall and maintenance is essential to minimize PI.</p>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":" ","pages":"1215-1225"},"PeriodicalIF":4.3,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9508294","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 chairside digital radiographic guide for registering digital casts to cone beam computed tomography scans with strong metallic artifacts.","authors":"Qin Wu, Jiacheng Wu, Ying Tan, Jikui Sun, Haiyang Yu","doi":"10.1016/j.prosdent.2022.11.025","DOIUrl":"10.1016/j.prosdent.2022.11.025","url":null,"abstract":"<p><p>Accurate registration of digital casts and cone beam computed tomography (CBCT) scans with strong metallic artifacts is essential for the accuracy of guided implant surgery. This article describes a procedure for mapping digital casts onto CBCT scans containing significant scatter artifacts in the virtual implant planning stage. The technique uses a chairside segmented occlusal wing-like radiographic guide, which is constructed of digital splints fabricated using a desktop 3-dimensional printer and composite resin spheres as markers to accurately superimpose the bimaxillary digital scans onto the CBCT scans in a single procedure. This cost-effective technique is timesaving for clinicians and patients, and the digital information for implant planning can be collected in a single visit.</p>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":" ","pages":"1104-1111"},"PeriodicalIF":4.3,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10485510","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 a hollow pontic design with various wall thicknesses on the axial internal fit and failure load of 3D printed three-unit resin prostheses.","authors":"Sung-Hoon Lee, Seong-Kyun Kim, Jai-Young Koak, Ji-Man Park","doi":"10.1016/j.prosdent.2024.07.004","DOIUrl":"10.1016/j.prosdent.2024.07.004","url":null,"abstract":"<p><strong>Statement of problem: </strong>A 3-dimensionally (3D) printed 3-unit interim fixed dental prosthesis (FDP) undergoes inward polymerization shrinkage to the pontic region, leading to nonuniform internal fit and improper accuracy. Whether axial wall thickness influences accuracy is unclear.</p><p><strong>Purpose: </strong>The purpose of this in vitro study was to analyze the axial internal fit and failure load associated with a hollow pontic design of varying wall thicknesses in stereolithography (SLA) 3D printed 3-unit interim FDPs.</p><p><strong>Material and methods: </strong>A master model for a 3-unit interim FDP with 2 implant abutments was designed. Two master models were produced by using milling and direct metal laser sintering (DMLS). Sixty SLA 3D printed specimens were produced with a hollow pontic design of 4 wall thicknesses (solid and 2.5, 2.0, and 1.5 mm). Fifteen milled specimens were produced with a solid pontic design. The axial internal fit in the coronal section was measured in terms of intaglio and cameo mid-axial wall areas relative to the abutments by using microcomputed tomography (μCT). The failure load was measured by using a universal testing machine at a loading rate of 1 mm/minute. For statistical analysis, parametric tests were performed (α=.05). Horizontal μCT sections were compared qualitatively, and failure patterns were categorized among groups.</p><p><strong>Results: </strong>The hollow pontic designs with 2.0- and 1.5-mm wall thicknesses presented significantly lower mean intaglio mid-axial gaps than the solid pontic design (P<.001) and similar intaglio and cameo mid-axial gaps in the horizontal μCT sections. The hollow pontic design with the 2.0-mm wall thickness had a significantly higher mean failure load than that with the 1.5-mm wall thickness (P<.001) and a statistically similar mean failure load to that of the solid pontic design (P=.549). As the wall thickness of the hollow pontic decreased from 2.5 to 1.5 mm, the ratio of pontic fracture to complete fracture of the prosthesis increased.</p><p><strong>Conclusions: </strong>For SLA 3D printed 3-unit interim FDPs, axial internal fit was enhanced by the application of an appropriate hollow pontic design. Considering both the structural strength and fit, a hollow pontic design with a 2.0-mm wall thickness should be selected.</p>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":" ","pages":"1287.e1-1287.e10"},"PeriodicalIF":4.3,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142036120","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":"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":" ","pages":"1309.e1-1309.e9"},"PeriodicalIF":4.3,"publicationDate":"2024-12-01","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":"Letter to the Editor regarding \"Influence of occlusal collision corrections completed by two intraoral scanners or a dental design program on the accuracy of the maxillomandibular relationship\".","authors":"Jiehua Tian, Yuqi Han","doi":"10.1016/j.prosdent.2024.08.026","DOIUrl":"10.1016/j.prosdent.2024.08.026","url":null,"abstract":"","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":" ","pages":"1350-1351"},"PeriodicalIF":4.3,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142348951","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":"Immediate reconstruction of defects after a partial maxillectomy with a digitally planned, prefabricated, 3-dimensionally printed, esthetic obturator prosthesis.","authors":"Yongjie Hu, Jiannan Liu, Wenyan Wu, Zhen Wang","doi":"10.1016/j.prosdent.2023.01.022","DOIUrl":"10.1016/j.prosdent.2023.01.022","url":null,"abstract":"<p><p>A digital workflow was used to design and prefabricate a 3-dimensionally printed, esthetic obturator prosthesis for immediate placement after a partial maxillectomy. The approach involved simultaneous reciprocation and support of the maxillary defect during the surgery and minimized the incidence of cicatricial contracture of the soft tissue, preventing permanent facial deformity and dysfunction.</p>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":" ","pages":"1330.e1-1330.e7"},"PeriodicalIF":4.3,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9336780","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 active tactile sensibility in a single-tooth implant opposing a natural tooth with either an immediate or delayed functional loading protocol: A parallel design clinical study.","authors":"Kumari Deepika, Atul Bhatnagar, Ankita Singh, Romesh Soni","doi":"10.1016/j.prosdent.2022.11.019","DOIUrl":"10.1016/j.prosdent.2022.11.019","url":null,"abstract":"<p><strong>Statement of problem: </strong>High primary stability makes immediate loading more predictable, but immediately loaded implants are subjected to higher stresses and strains during the healing phase than implants that are left to heal for 3 months. Whether an earlier sensory-motor phenomenon with an immediate loading protocol helps to reduce the risk of overloading at the implant-bone interface is unclear.</p><p><strong>Purpose: </strong>The purpose of this concurrent parallel design clinical study was to evaluate and compare active tactile sensibility for a single-tooth implant opposing a natural tooth in the mandibular posterior region with either a delayed or immediate functional loading -protocol.</p><p><strong>Material and methods: </strong>In this parallel group randomized trial, 2 test groups were formed: the DL group comprised 20 participants with the delayed loading protocol (loading after 3 months), and the IL group comprised 20 participants with the immediate loading protocol (loading within 2 days). Natural tooth-to-tooth contact on the side contralateral to the implant site (split mouth) in both test groups was used as a control to evaluate active tactile sensibility, which was evaluated in the test and control sites of both groups by using interocclusal articulating foils of varying thickness in maximum intercuspation. Active tactile sensibility was compared between the DL and IL groups at 3 and 6 months of follow-up. The nonparametric Mann-Whitney test was used for intergroup comparisons (P=.05).</p><p><strong>Results: </strong>A significant difference was found for 8-μm- and 12-μm-thick articulating foil at 3 months and for 8-μm-thick foil at 6 months (P<.05), indicating a difference in active tactile sensibility between the DL and IL groups. No implant failure was recorded in this short clinical study.</p><p><strong>Conclusions: </strong>An immediate loading protocol can be performed in implants with sufficient primary stability. Upon loading, the IL group has shown more active tactile perception than the DL group.</p>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":" ","pages":"1270-1276"},"PeriodicalIF":4.3,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10847254","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 two different occlusal patterns on single posterior implant-supported crowns: A 12-month prospective study of occlusal analysis.","authors":"Ru Zhang, Xiaoyu Hao, Kaiyu Zhang","doi":"10.1016/j.prosdent.2022.11.026","DOIUrl":"10.1016/j.prosdent.2022.11.026","url":null,"abstract":"&lt;p&gt;&lt;strong&gt;Statement of problem: &lt;/strong&gt;According to the concept of implant-protected occlusion, light occlusion and late contact could prevent implants from occlusal overload. However, clinical data demonstrating how light occlusion differs from normal occlusion are lacking.&lt;/p&gt;&lt;p&gt;&lt;strong&gt;Purpose: &lt;/strong&gt;The purpose of this prospective clinical study was to characterize the occlusal variation of single posterior implant-supported crowns with or without light occlusion.&lt;/p&gt;&lt;p&gt;&lt;strong&gt;Material and methods: &lt;/strong&gt;Participants with a single missing posterior maxillary or mandibular molar who were to receive implant-supported zirconia ceramic crowns were enrolled. The participants were divided into a light occlusion group, in which a 12-μm articulating film could be removed from the implant-supported crown and opposing natural teeth under the intercuspal position, and a normal occlusion group, in which the articulating film could not be removed. All participants underwent occlusal examinations using the T-scan III system, answered a satisfaction questionnaire using a visual analog scale (VAS), and received regular follow-ups. The participants were evaluated at 0.5, 3, 6, and 12 months after implant-supported crown delivery. The relative occlusal force of the implant-supported crowns, mesial teeth, control teeth (corresponding natural tooth on the dentition contralateral to each implant), and the occlusal contact time of implant-supported crowns were recorded. Moreover, the asymmetry index of the occlusal force and the VAS score were calculated. Two independent-sample tests were used to compare the 2 groups. The Wilcoxon rank sum and Mann‒Whitney tests were used to compare nonnormally distributed data (α=.001).&lt;/p&gt;&lt;p&gt;&lt;strong&gt;Results: &lt;/strong&gt;Fifty study participants with a mean ±standard deviation age of 36.97 ±7.34 years (23 men and 27 women aged 20 to 50 years) were followed for 0.5 to 12 months. No obvious complications of overloading were observed in either group. The mean ±standard deviation of the relative occlusal force of implant-supported crowns in the light occlusion group (from 4.91 ±3.52% to 10.34 ±4.35%) was always lower than that in the normal occlusion group (from 10.45 ±4.32% to 18.15 ±4.80%), while the mean ±standard deviation of the occlusal contact time in the light occlusion group (from 0.38 ±0.26 seconds to 0.10 ±0.07 seconds) was significantly later than that in the normal occlusion group (from 0.12 ±0.08 seconds to 0.04 ±0.02 seconds) (P&lt;.001). The value of the asymmetry index of occlusal force remained within the normal range (10%). The VAS score in the normal occlusion group was significantly higher than that in the light occlusion group (P&lt;.001).&lt;/p&gt;&lt;p&gt;&lt;strong&gt;Conclusions: &lt;/strong&gt;Providing light occlusion to reduce occlusal force and delay the contact time was not stable over time. The relative occlusal force and occlusal contact time showed a similar development trend in both groups, and no obvious signs of occlusa","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":" ","pages":"1277-1284"},"PeriodicalIF":4.3,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10485511","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, \"Influence of occlusal collision corrections completed by two intraoral scanners or a dental design program on the accuracy of the maxillomandibular relationship\".","authors":"Marta Revilla-León, Miguel Gómez-Polo, Abdul B Barmak, John C Kois, Burak Yilmaz, Jorge Alonso Pérez-Barquero","doi":"10.1016/j.prosdent.2024.09.002","DOIUrl":"10.1016/j.prosdent.2024.09.002","url":null,"abstract":"","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":" ","pages":"1352-1356"},"PeriodicalIF":4.3,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142502641","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":"Influence of speech aid prosthesis with speech therapy on speech outcomes in adult patients with persisting velopharyngeal insufficiency: A retrospective analysis.","authors":"Bhavita Wadhwa, Uvashri Selvaraj, Sudhir Bhandari, Anuradha Sharma, Satinder Pal Singh","doi":"10.1016/j.prosdent.2022.11.022","DOIUrl":"10.1016/j.prosdent.2022.11.022","url":null,"abstract":"<p><strong>Statement of problem: </strong>Prosthetic intervention with a speech aid prosthesis (SAP) along with speech therapy has been reported to improve speech outcomes in patients with persisting velopharyngeal insufficiency (VPI). However, little is known regarding the impact of this treatment on different speech parameters over time in adult patients with VPI.</p><p><strong>Purpose: </strong>The purpose of this retrospective study was to evaluate the change in speech parameters after rehabilitation with an SAP and speech therapy in adult patients with VPI using subjective and objective tests.</p><p><strong>Material and methods: </strong>Patients above 16 years of age who had received prosthetic treatment for VPI and had complete speech assessment records between 2017 and 2020 were included in the analysis. After completion of the prosthetic treatment, speech therapy comprising 2 sessions per week of 45 minutes was provided by a speech pathologist. Speech evaluation was performed using tests that included speech intelligibility calculation, nasal pinch test, audible nasal air emissions, acoustic analysis, and the nasalance check. Assessments were done at 4 time intervals: T0: without an SAP; T1: 1 week with an SAP; T2: 1 month with an SAP; and T3: 3 months with an SAP. A descriptive analysis was followed by a comparison between groups using the Friedman test for subjective assessments and repeated measures ANOVA for objective tests (α=.05).</p><p><strong>Results: </strong>Of 10 individuals who had received an SAP, 5 participants, 2 men and 3 women with a mean age of 38 years were included in the analysis. Statistically significant improvement in mean scores was observed from T0 to T3 concerning speech intelligibility (P<.001), hypernasality (P<.001), audible nasal air emission (P<.001), mean fundamental frequency (P=.034), shimmer percentage (P=.004), and nasalance (P=.004). Improvement in jitter percentage was not statistically significant (P=.218).</p><p><strong>Conclusions: </strong>An SAP along with speech therapy should be considered as a conservative and effective treatment option for addressing speech issues in adult patients with VPI.</p>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":" ","pages":"1332-1338"},"PeriodicalIF":4.3,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10485508","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}