Journal of Prosthetic Dentistry最新文献

{"title":"Effect of ultrasonic chemical cleaning solutions on different dental interim restoration material properties. Part I: Physical properties of color stability and surface roughness","authors":"Kawther Ali BDM, B.Med.SC, MS, Ahmad Alenezi BSc, MSc, PhD, Abdulaziz A. Alzaid BDS, MS, Charles Goodacre DDS, MSD","doi":"10.1016/j.prosdent.2026.07.024","DOIUrl":"10.1016/j.prosdent.2026.07.024","url":null,"abstract":"<div><h3>Statement of problem</h3><div>Cleaning dental interim crowns between treatment visits using chemical agents may affect color stability and surface roughness. Studies investigating the reaction of different interim materials with different cleaning solutions are lacking.</div></div><div>Cleaning dental interim crowns between treatment visits using chemical agents may affect color stability and surface roughness. Studies investigating the reaction of different interim materials with different cleaning solutions are lacking.</div><div><h3>Purpose</h3><div>The purpose of this in vitro study was to evaluate the effect of ultrasonic chemical cleaning solutions on the color stability and surface roughness of conventionally and computer-aided design and computer-aided manufacturing (CAD-CAM) fabricated dental interim materials.</div></div><div>The purpose of this in vitro study was to evaluate the effect of ultrasonic chemical cleaning solutions on the color stability and surface roughness of conventionally and computer-aided design and computer-aided manufacturing (CAD-CAM) fabricated dental interim materials.</div><div><h3>Material and methods</h3><div>A total of 192 interim restoration specimens were fabricated using the following materials and fabrication methods: conventional chemically activated polymethyl methacrylate (PMMA) <em>n</em>=48, bis-acrylic composite <em>n</em>=48, milled PMMA <em>n</em>=48, and 3-dimensional (3D) printed resin <em>n</em>=48. Each group was treated with 4 solutions (water <em>n</em>=12, general purpose cleaner <em>n</em>=12, calculus and stain cleaner <em>n</em>=12, and cement remover cleaner <em>n</em>=12). Each specimen was immersed in the assigned solution for 5 cycles of 10 minutes using an ultrasonic water bath. Color measurements and surface roughness were obtained for each specimen at baseline, after 2 cycles, and after 5 cycles using a spectrophotometer and optical profiler, respectively. A repeated measures linear mixed model analysis was performed to detect differences in color changes and surface roughness between different interim materials and different solutions after 2 and 5 cycles of ultrasonic cleaning (α=.05).</div></div><div>A total of 192 interim restoration specimens were fabricated using the following materials and fabrication methods: conventional chemically activated polymethyl methacrylate (PMMA) <em>n</em>=48, bis-acrylic composite <em>n</em>=48, milled PMMA <em>n</em>=48, and 3-dimensional (3D) printed resin <em>n</em>=48. Each group was treated with 4 solutions (water <em>n</em>=12, general purpose cleaner <em>n</em>=12, calculus and stain cleaner <em>n</em>=12, and cement remover cleaner <em>n</em>=12). Each specimen was immersed in the assigned solution for 5 cycles of 10 minutes using an ultrasonic water bath. Color measurements and surface roughness were obtained for each specimen at baseline, after 2 cycles, and after 5 cycles using a spectrophotometer and optical profiler, resp","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"136 4","pages":"Pages 1214-1222"},"PeriodicalIF":5.6,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148794702","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, “Dimensional accuracy and clinical adaptation of monolithic zirconia crowns fabricated with the nanoparticle jetting technique” and “Effect of finish line designs on the dimensional accuracy of monolithic zirconia crowns fabricated with a material jetting technique” by Lyu et al","authors":"Sherif Sultan BDS, MSc, PhD","doi":"10.1016/j.prosdent.2026.05.056","DOIUrl":"10.1016/j.prosdent.2026.05.056","url":null,"abstract":"","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"136 4","pages":"Page e136"},"PeriodicalIF":5.6,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148396975","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":"Complete mouth rehabilitation with implant-supported fixed prosthesis in a patient with pemphigus vulgaris: A clinical report","authors":"Muhammad Ahsan Kaleem Khan BDS,&nbsp;Syed Murtaza Raza Kazmi BDS, FCPS, MHPE, FICOI, FHEA, FDTFed,&nbsp;Taimur Khalid BDS, MDSc, MCLINDENT, M PROS RCSEd","doi":"10.1016/j.prosdent.2026.06.039","DOIUrl":"10.1016/j.prosdent.2026.06.039","url":null,"abstract":"<div><div>This clinical report describes the prosthetic rehabilitation of a 59-year-old edentulous woman with pemphigus vulgaris using implant-supported fixed prostheses. The treatment involved the placement of endosseous dental implants with cone beam computed tomography guided planning, followed by multiunit abutments and screw-retained prostheses. At the 3-year follow-up, the patient had experienced significant improvement in health, esthetics, and function, with stable implants and minimal bone loss.</div></div><div>This clinical report describes the prosthetic rehabilitation of a 59-year-old edentulous woman with pemphigus vulgaris using implant-supported fixed prostheses. The treatment involved the placement of endosseous dental implants with cone beam computed tomography guided planning, followed by multiunit abutments and screw-retained prostheses. At the 3-year follow-up, the patient had experienced significant improvement in health, esthetics, and function, with stable implants and minimal bone loss.</div>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"136 4","pages":"Pages 897-901"},"PeriodicalIF":5.6,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148712670","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":"Salivary flow and oral health-related quality of life in edentulous denture stomatitis positive individuals: A randomized clinical trial","authors":"Adriana Barbosa Ribeiro DDS, PhD,&nbsp;Lorena Mosconi Clemente DDS, MSc,&nbsp;Beatriz de Camargo Poker DDS, MSc,&nbsp;Júlio Cesar Taffarel DDS,&nbsp;Vinícius Sabedra DDS,&nbsp;Ana Paula Macedo PhD,&nbsp;Helio Cesar Salgado PhD,&nbsp;Cláudia Helena Silva-Lovato DDS, PhD","doi":"10.1016/j.prosdent.2026.07.031","DOIUrl":"10.1016/j.prosdent.2026.07.031","url":null,"abstract":"&lt;div&gt;&lt;h3&gt;Statement of problem&lt;/h3&gt;&lt;div&gt;The effects of different denture stomatitis (DS) management strategies on oral health-related quality of life (OHRQoL) and salivary flow (SF) in complete denture wearers remain unclear.&lt;/div&gt;&lt;/div&gt;&lt;div&gt;The effects of different denture stomatitis (DS) management strategies on oral health-related quality of life (OHRQoL) and salivary flow (SF) in complete denture wearers remain unclear.&lt;/div&gt;&lt;div&gt;&lt;h3&gt;Purpose&lt;/h3&gt;&lt;div&gt;The purpose of this double-blind, parallel-group randomized clinical trial was to compare the effects of nystatin therapy and sodium hypochlorite denture hygiene on OHRQoL, salivary flow (SF), and DS severity in complete denture wearers.&lt;/div&gt;&lt;/div&gt;&lt;div&gt;The purpose of this double-blind, parallel-group randomized clinical trial was to compare the effects of nystatin therapy and sodium hypochlorite denture hygiene on OHRQoL, salivary flow (SF), and DS severity in complete denture wearers.&lt;/div&gt;&lt;div&gt;&lt;h3&gt;Material and methods&lt;/h3&gt;&lt;div&gt;A total of 50 complete denture wearers with DS were allocated to 2 groups: nystatin mouth rinse (GN) or a sodium hypochlorite (GSH0.25%)-based denture hygiene protocol. OHRQoL, SF, and DS severity were assessed at baseline and at 15 and 45 days, and data were analyzed using generalized estimating equations (α=.05).&lt;/div&gt;&lt;/div&gt;&lt;div&gt;A total of 50 complete denture wearers with DS were allocated to 2 groups: nystatin mouth rinse (GN) or a sodium hypochlorite (GSH0.25%)-based denture hygiene protocol. OHRQoL, SF, and DS severity were assessed at baseline and at 15 and 45 days, and data were analyzed using generalized estimating equations (α=.05).&lt;/div&gt;&lt;div&gt;&lt;h3&gt;Results&lt;/h3&gt;&lt;div&gt;Forty-seven participants completed the study. Significant improvements over time were observed in OHRQoL overall and domains related to masticatory function, social disability, and psychological discomfort (&lt;em&gt;P&lt;/em&gt;≤.001), regardless of treatment, with no treatment-by-time interactions. SF remained stable over time, with no significant effects of treatment, time, or interaction (&lt;em&gt;P&lt;/em&gt;&gt;.05). DS severity decreased significantly over time (&lt;em&gt;P&lt;/em&gt;&lt;.001), with no significant differences between groups or interaction effects (&lt;em&gt;P&lt;/em&gt;&gt;.05).&lt;/div&gt;&lt;/div&gt;&lt;div&gt;Forty-seven participants completed the study. Significant improvements over time were observed in OHRQoL overall and domains related to masticatory function, social disability, and psychological discomfort (&lt;em&gt;P&lt;/em&gt;≤.001), regardless of treatment, with no treatment-by-time interactions. SF remained stable over time, with no significant effects of treatment, time, or interaction (&lt;em&gt;P&lt;/em&gt;&gt;.05). DS severity decreased significantly over time (&lt;em&gt;P&lt;/em&gt;&lt;.001), with no significant differences between groups or interaction effects (&lt;em&gt;P&lt;/em&gt;&gt;.05).&lt;/div&gt;&lt;div&gt;&lt;h3&gt;Conclusions&lt;/h3&gt;&lt;div&gt;Both therapies were associated with improved OHRQoL in complete denture wearers with DS. These improvements occurred alongside reductions in denture","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"136 4","pages":"Pages 1133-1140"},"PeriodicalIF":5.6,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148794813","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":"Effect of different laser modalities and treatment methods on the surface roughness and alterations of 3D printed resins and PEEK: An in vitro study","authors":"Irem Celikyurek Karabagli DDS, PhD,&nbsp;Akanay Copuroglu DDS, PhD,&nbsp;Zeynep Ozkurt-Kayahan DDS, PhD,&nbsp;Ozgun Yusuf Ozyilmaz DDS, PhD","doi":"10.1016/j.prosdent.2026.07.029","DOIUrl":"10.1016/j.prosdent.2026.07.029","url":null,"abstract":"&lt;div&gt;&lt;h3&gt;Statement of problem&lt;/h3&gt;&lt;div&gt;The effects of laser irradiation, airborne-particle abrasion, and electrolytic cleaning on the surface roughness of 3-dimensionally (3D) printed resin and PEEK healing abutments remain unclear.&lt;/div&gt;&lt;/div&gt;&lt;div&gt;The effects of laser irradiation, airborne-particle abrasion, and electrolytic cleaning on the surface roughness of 3-dimensionally (3D) printed resin and PEEK healing abutments remain unclear.&lt;/div&gt;&lt;div&gt;&lt;h3&gt;Purpose&lt;/h3&gt;&lt;div&gt;The purpose of this in vitro study was to examine surface changes after different treatment methods were applied to the surfaces of the different 3D printed resin and PEEK materials used as custom healing abutments.&lt;/div&gt;&lt;/div&gt;&lt;div&gt;The purpose of this in vitro study was to examine surface changes after different treatment methods were applied to the surfaces of the different 3D printed resin and PEEK materials used as custom healing abutments.&lt;/div&gt;&lt;div&gt;&lt;h3&gt;Material and methods&lt;/h3&gt;&lt;div&gt;Disk-shaped specimens (3×10 mm) were fabricated from three 3D printed resins (VarseoSmile TriniQ, Saremco Print Crowntec, C&amp;B Ceramic Resin) and PEEK (CopraPeek) (N=240). Specimens were assigned to 5 surface treatment groups: erbium-doped yttrium aluminum garnet (Er:YAG), neodymium-doped yttrium aluminum garnet (Nd:YAG), diode laser, airborne-particle abrasion, and GalvoSurge (&lt;em&gt;n&lt;/em&gt;=48). Surface roughness (Ra) was measured at baseline (T0) and after treatment (T1). Representative specimens were examined using scanning electron microscopy (SEM). Data were analyzed using nonparametric tests (α=.05).&lt;/div&gt;&lt;/div&gt;&lt;div&gt;Disk-shaped specimens (3×10 mm) were fabricated from three 3D printed resins (VarseoSmile TriniQ, Saremco Print Crowntec, C&amp;B Ceramic Resin) and PEEK (CopraPeek) (N=240). Specimens were assigned to 5 surface treatment groups: erbium-doped yttrium aluminum garnet (Er:YAG), neodymium-doped yttrium aluminum garnet (Nd:YAG), diode laser, airborne-particle abrasion, and GalvoSurge (&lt;em&gt;n&lt;/em&gt;=48). Surface roughness (Ra) was measured at baseline (T0) and after treatment (T1). Representative specimens were examined using scanning electron microscopy (SEM). Data were analyzed using nonparametric tests (α=.05).&lt;/div&gt;&lt;div&gt;&lt;h3&gt;Results&lt;/h3&gt;&lt;div&gt;Airborne-particle abrasion and Er:YAG significantly increased surface roughness in all groups (&lt;em&gt;P&lt;/em&gt;&lt;.05). The highest roughness was observed in the Crowntec–airborne-particle abrasion group (0.89 ±0.09 µm), and the lowest in the TriniQ–GalvoSurge group (0.09 ±0.02 µm). GalvoSurge caused no significant change in TriniQ and PEEK but increased roughness in C&amp;B and Crowntec. Nd:YAG showed no effect in TriniQ and C&amp;B but increased roughness in Crowntec and PEEK, while diode laser affected only Crowntec (&lt;em&gt;P&lt;/em&gt;&lt;.05). SEM analysis confirmed treatment-dependent surface morphology changes.&lt;/div&gt;&lt;/div&gt;&lt;div&gt;Airborne-particle abrasion and Er:YAG significantly increased surface roughness in all groups (&lt;em&gt;P&lt;/em&gt;&lt;.05). The highest roug","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"136 4","pages":"Pages e111-e117"},"PeriodicalIF":5.6,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148760749","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":"Surgical extrusion with the Seif surgical extrusion protocol: Up to seven-year outcomes in 201 consecutive treatments.","authors":"Vala Seif","doi":"10.1016/j.prosdent.2026.07.036","DOIUrl":"https://doi.org/10.1016/j.prosdent.2026.07.036","url":null,"abstract":"<p><strong>Statement of problem: </strong>Teeth deemed nonrestorable because of inadequate ferrule and extensive structural loss, often from deep caries, fractures, or resorptive defects, are routinely planned for extraction and implant placement. Long-term clinical outcome data for a standardized surgical extrusion workflow designed to regain restorability while maintaining biologic stability are limited.</p><p><strong>Purpose: </strong>The purpose of this clinical study was to assess clinical outcomes of surgical extrusion using the Seif surgical extrusion protocol (SSEP) as a tooth preservation alternative to extraction in severely compromised teeth initially considered nonrestorable, with a follow-up of up to 7 years.</p><p><strong>Material and methods: </strong>This retrospective single-operator cohort included 201 consecutive teeth (January 2019 to November 2025) managed with a standardized workflow (SSEP), including atraumatic axial-rotational mobilization, splinting with flowable composite resin, delayed endodontic treatment when indicated, and definitive restoration after soft tissue maturation. Follow-up was up to 7 years (range, 6 months to 7 years). The primary outcome was tooth survival (retention in function). Secondary outcomes were biologic complications, including clinically evident periodontal breakdown and clinical and radiographic evidence of periapical pathology, ankylosis, or replacement resorption assessed clinically and on available follow-up radiographs. Clinical success was defined as survival without clinically evident periodontal breakdown and without clinical radiographic evidence of periapical pathology, ankylosis, or replacement resorption.</p><p><strong>Results: </strong>At the most recent follow-up, 193 of 201 teeth were retained and functional (clinical success 96.02%; 95% CI, 92.3 to 98.0). All failures (n=8; 3.98%) occurred within the first year and were attributed to unfavorable crown-root ratio after overextrusion, root fracture in structurally compromised roots, early splint debonding with traumatic loading, or poor oral hygiene. No clinically or radiographically evident ankylosis was detected, and no radiographic findings consistent with replacement resorption were observed on follow-up radiographs when available.</p><p><strong>Conclusions: </strong>In a large consecutive series of severely compromised teeth initially considered nonrestorable and planned for extraction, surgical extrusion using the SSEP achieved high rates of retention in function with biologic stability during a follow-up of up to 7 years, supporting the protocol as a tooth preservation option that expands restorative decision-making.</p>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":" ","pages":""},"PeriodicalIF":5.6,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149111316","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":"Load-bearing capacity of screw-retained zirconia crown-abutment complexes of different heights fabricated by additive and subtractive methods after cyclic loading: An in vitro study","authors":"Pedro Molinero-Mourelle Dr med dent, MAS, PhD,&nbsp;Mustafa Borga Dönmez DDS, PhD,&nbsp;Gülce Çakmak DDS, Dr med dent, PhD,&nbsp;Julia Wittneben Dr med dent, PhD, MMedSc,&nbsp;Martin Schimmel Dr med dent,&nbsp;Burak Yılmaz DDS, PhD","doi":"10.1016/j.prosdent.2026.06.034","DOIUrl":"10.1016/j.prosdent.2026.06.034","url":null,"abstract":"&lt;div&gt;&lt;h3&gt;Statement of problem&lt;/h3&gt;&lt;div&gt;Additive manufacturing has emerged as an alternative for fabricating implant-supported zirconia restorations. However, knowledge regarding the effect of restoration height on the mechanical behavior of such restorations remains limited.&lt;/div&gt;&lt;/div&gt;&lt;div&gt;Additive manufacturing has emerged as an alternative for fabricating implant-supported zirconia restorations. However, knowledge regarding the effect of restoration height on the mechanical behavior of such restorations remains limited.&lt;/div&gt;&lt;div&gt;&lt;h3&gt;Purpose&lt;/h3&gt;&lt;div&gt;The purpose of this in vitro study was to compare the load-bearing capacity of additively and subtractively manufactured screw-retained zirconia crown-abutment complexes of different heights following cyclic loading.&lt;/div&gt;&lt;/div&gt;&lt;div&gt;The purpose of this in vitro study was to compare the load-bearing capacity of additively and subtractively manufactured screw-retained zirconia crown-abutment complexes of different heights following cyclic loading.&lt;/div&gt;&lt;div&gt;&lt;h3&gt;Material and methods&lt;/h3&gt;&lt;div&gt;A mandibular model with an implant placed in the right first molar region was digitized to design implant-supported screw-retained crowns with heights of 10 or 15 mm. These designs were used to fabricate 10- or 15-mm 3 mol% zirconia crowns by additive or subtractive manufacturing (&lt;em&gt;n&lt;/em&gt;=5). All crowns were cemented onto identical titanium-base abutments using an autopolymerizing dental luting composite resin and subjected to cyclic loading (1.7 Hz, 98 N, 1.2 million cycles). After cyclic loading, all specimens were subjected to load-to-failure testing. The maximum loads recorded at the point of crown-abutment complex failure were analyzed using a 2-way analysis of variance, with manufacturing method and crown height as main factors, including their interaction (α=.05).&lt;/div&gt;&lt;/div&gt;&lt;div&gt;A mandibular model with an implant placed in the right first molar region was digitized to design implant-supported screw-retained crowns with heights of 10 or 15 mm. These designs were used to fabricate 10- or 15-mm 3 mol% zirconia crowns by additive or subtractive manufacturing (&lt;em&gt;n&lt;/em&gt;=5). All crowns were cemented onto identical titanium-base abutments using an autopolymerizing dental luting composite resin and subjected to cyclic loading (1.7 Hz, 98 N, 1.2 million cycles). After cyclic loading, all specimens were subjected to load-to-failure testing. The maximum loads recorded at the point of crown-abutment complex failure were analyzed using a 2-way analysis of variance, with manufacturing method and crown height as main factors, including their interaction (α=.05).&lt;/div&gt;&lt;div&gt;&lt;h3&gt;Results&lt;/h3&gt;&lt;div&gt;No crown failure occurred during cyclic loading. During load-to-failure testing, abutments exhibited plastic deformation before crown fracture, irrespective of manufacturing method or crown height. Accordingly, the recorded maximum loads reflected the load-bearing capacity of the crown-abutment complex, and no statistically sig","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"136 4","pages":"Pages 1150-1156"},"PeriodicalIF":5.6,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148578995","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":"Occlusal vertical dimension estimated from 3-dimensional facial scans using a craniometric equation: A retrospective clinical study","authors":"Louise Viel DDS,&nbsp;Virginie Chuy DDS, PhD,&nbsp;Justine Bouscasse DDS,&nbsp;Adrien Laran DDS,&nbsp;Adrien Naveau DDS, PhD","doi":"10.1016/j.prosdent.2026.06.023","DOIUrl":"10.1016/j.prosdent.2026.06.023","url":null,"abstract":"&lt;div&gt;&lt;h3&gt;Statement of problem&lt;/h3&gt;&lt;div&gt;Establishing an appropriate occlusal vertical dimension (OVD) is a critical and challenging step in complete mouth rehabilitation, particularly in patients with severe tooth wear or edentulism. Although craniometric equations have been proposed to estimate OVD from facial measurements, their applicability to 3-dimensional (3D) facial scans within digital workflows remains unclear.&lt;/div&gt;&lt;/div&gt;&lt;div&gt;Establishing an appropriate occlusal vertical dimension (OVD) is a critical and challenging step in complete mouth rehabilitation, particularly in patients with severe tooth wear or edentulism. Although craniometric equations have been proposed to estimate OVD from facial measurements, their applicability to 3-dimensional (3D) facial scans within digital workflows remains unclear.&lt;/div&gt;&lt;div&gt;&lt;h3&gt;Purpose&lt;/h3&gt;&lt;div&gt;The purpose of this retrospective clinical study was to determine whether OVD estimated from 3D facial scans using a craniometric equation is clinically equivalent to OVD measured directly.&lt;/div&gt;&lt;/div&gt;&lt;div&gt;The purpose of this retrospective clinical study was to determine whether OVD estimated from 3D facial scans using a craniometric equation is clinically equivalent to OVD measured directly.&lt;/div&gt;&lt;div&gt;&lt;h3&gt;Material and methods&lt;/h3&gt;&lt;div&gt;Facial anthropometric measurements and OVD were obtained both clinically and from 3D facial scans acquired with 3 different devices (Artec Spider scanner; Artec 3D, Einstar; Shining 3D, Qlone on iPhone 13 Pro; Apple Inc) in 23 dentate participants. Based on these facial measurements, OVD was also estimated for each modality (clinical and scanned) using a craniometric equation. Equivalence was assessed with the two 1-sided &lt;em&gt;t&lt;/em&gt; test (TOST) procedure using a predefined clinical equivalence margin of ±2 mm.&lt;/div&gt;&lt;/div&gt;&lt;div&gt;Facial anthropometric measurements and OVD were obtained both clinically and from 3D facial scans acquired with 3 different devices (Artec Spider scanner; Artec 3D, Einstar; Shining 3D, Qlone on iPhone 13 Pro; Apple Inc) in 23 dentate participants. Based on these facial measurements, OVD was also estimated for each modality (clinical and scanned) using a craniometric equation. Equivalence was assessed with the two 1-sided &lt;em&gt;t&lt;/em&gt; test (TOST) procedure using a predefined clinical equivalence margin of ±2 mm.&lt;/div&gt;&lt;div&gt;&lt;h3&gt;Results&lt;/h3&gt;&lt;div&gt;Equivalence was not observed between equation-based OVD derived from scan measurements and clinically measured OVD for any device. Scan-derived equation-based OVD values systematically differed from clinical measurements by −3.1 to −3.6 mm, exceeding the predefined equivalence margin.&lt;/div&gt;&lt;/div&gt;&lt;div&gt;Equivalence was not observed between equation-based OVD derived from scan measurements and clinically measured OVD for any device. Scan-derived equation-based OVD values systematically differed from clinical measurements by −3.1 to −3.6 mm, exceeding the predefined equivalence margin.&lt;/div&gt;&lt;div&gt;&lt;h3&gt;Conclusions&lt;/h3&gt;&lt;div&gt;Esti","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"136 4","pages":"Pages 1086-1091"},"PeriodicalIF":5.6,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148437084","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":"Antibacterial and antibiofilm activities of Zn2+ against Staphylococcus aureus and Streptococcus mutans","authors":"Fei Shu MDS,&nbsp;Zhifang Wang MDS,&nbsp;Wanxi Chen MDS,&nbsp;Mei Liu DDS, PhD","doi":"10.1016/j.prosdent.2026.07.011","DOIUrl":"10.1016/j.prosdent.2026.07.011","url":null,"abstract":"&lt;div&gt;&lt;h3&gt;Statement of problem&lt;/h3&gt;&lt;div&gt;&lt;em&gt;Staphylococcus aureus&lt;/em&gt; (&lt;em&gt;S aureus&lt;/em&gt;) and &lt;em&gt;Streptococcus mutans&lt;/em&gt; (&lt;em&gt;S mutans&lt;/em&gt;) are pathogenic bacteria associated with denture-related stomatitis. Zinc (Zn), a widely used metallic antibacterial agent, can induce the production of reactive oxygen species (ROS) in cells, thereby inhibiting microbial growth and proliferation; studies, however, are lacking.&lt;/div&gt;&lt;/div&gt;&lt;div&gt;&lt;em&gt;Staphylococcus aureus&lt;/em&gt; (&lt;em&gt;S aureus&lt;/em&gt;) and &lt;em&gt;Streptococcus mutans&lt;/em&gt; (&lt;em&gt;S mutans&lt;/em&gt;) are pathogenic bacteria associated with denture-related stomatitis. Zinc (Zn), a widely used metallic antibacterial agent, can induce the production of reactive oxygen species (ROS) in cells, thereby inhibiting microbial growth and proliferation; studies, however, are lacking.&lt;/div&gt;&lt;div&gt;&lt;h3&gt;Purpose&lt;/h3&gt;&lt;div&gt;The purpose of this in vitro study was to determine the antibacterial and antibiofilm function of Zn&lt;sup&gt;2+&lt;/sup&gt; against &lt;em&gt;S aureus&lt;/em&gt; and &lt;em&gt;S mutans&lt;/em&gt; and assess gene expression changes to clarify its inhibitory mechanisms.&lt;/div&gt;&lt;/div&gt;&lt;div&gt;The purpose of this in vitro study was to determine the antibacterial and antibiofilm function of Zn&lt;sup&gt;2+&lt;/sup&gt; against &lt;em&gt;S aureus&lt;/em&gt; and &lt;em&gt;S mutans&lt;/em&gt; and assess gene expression changes to clarify its inhibitory mechanisms.&lt;/div&gt;&lt;div&gt;&lt;h3&gt;Material and methods&lt;/h3&gt;&lt;div&gt;Zn&lt;sup&gt;2+&lt;/sup&gt; at one-fourth minimum inhibitory concentration (MIC), one-half MIC, and MIC was co-cultured with the bacteria. Membrane integrity was evaluated by alkaline phosphatase (AKP) activity and live-dead staining. The oxidative stress mechanism was assessed by intracellular reactive oxygen species (ROS) and lipid peroxidation levels. Deoxyribonucleic acid (DNA) integrity was evaluated using agarose gel electrophoresis. Ribonucleic acid (RNA) sequencing combined with gene ontology (GO) and the Kyoto encyclopedia of genes and genomes (KEGG) bioinformatics analyses was performed to identify Zn²⁺-affected molecular pathways. The effect of Zn&lt;sup&gt;2+&lt;/sup&gt; on key gene expression in &lt;em&gt;S aureus&lt;/em&gt; and &lt;em&gt;S mutans&lt;/em&gt; was evaluated by quantitative reverse transcription polymerase chain reaction (qRT-PCR).&lt;/div&gt;&lt;/div&gt;&lt;div&gt;Zn&lt;sup&gt;2+&lt;/sup&gt; at one-fourth minimum inhibitory concentration (MIC), one-half MIC, and MIC was co-cultured with the bacteria. Membrane integrity was evaluated by alkaline phosphatase (AKP) activity and live-dead staining. The oxidative stress mechanism was assessed by intracellular reactive oxygen species (ROS) and lipid peroxidation levels. Deoxyribonucleic acid (DNA) integrity was evaluated using agarose gel electrophoresis. Ribonucleic acid (RNA) sequencing combined with gene ontology (GO) and the Kyoto encyclopedia of genes and genomes (KEGG) bioinformatics analyses was performed to identify Zn²⁺-affected molecular pathways. The effect of Zn&lt;sup&gt;2+&lt;/sup&gt; on key gene expression in &lt;em&gt;S aureus&lt;/em&gt; and &lt;em&gt;S mutans&lt;/em&gt; was evaluated by quantitative reverse transcr","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"136 4","pages":"Pages e79-e90"},"PeriodicalIF":5.6,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148679058","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 TMJ health on mandibular motion and the restorative position: A case series","authors":"Shahed Bayestehtarat DDS, MDS,&nbsp;Darren Nhan DDS,&nbsp;Nirvan Bayestehtarat","doi":"10.1016/j.prosdent.2026.06.026","DOIUrl":"10.1016/j.prosdent.2026.06.026","url":null,"abstract":"<div><div>Articulator settings were compared between adapted-unstable and healthy-stable states in 5 patients with subclinical temporomandibular disorders. Leaf gauge load testing was used to identify muscle-related dysfunction, while mechanical pantography and computerized axiography recorded mandibular motion in both states. Following stabilization with occlusal device therapy, coincident centric relation recordings on a verification device confirmed the transition to a healthy state and revealed a shift in the reproducible centric relation position. Observed clinical trends indicated that mandibular movement and the restorative position differed once musculoskeletal health was established, suggesting that reconstructions initiated in an unstable system may target a pathologic position.</div></div><div>Articulator settings were compared between adapted-unstable and healthy-stable states in 5 patients with subclinical temporomandibular disorders. Leaf gauge load testing was used to identify muscle-related dysfunction, while mechanical pantography and computerized axiography recorded mandibular motion in both states. Following stabilization with occlusal device therapy, coincident centric relation recordings on a verification device confirmed the transition to a healthy state and revealed a shift in the reproducible centric relation position. Observed clinical trends indicated that mandibular movement and the restorative position differed once musculoskeletal health was established, suggesting that reconstructions initiated in an unstable system may target a pathologic position.</div>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"136 4","pages":"Pages 907-910"},"PeriodicalIF":5.6,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148648611","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}