Journal of Prosthetic Dentistry最新文献

{"title":"Occlusal vertical dimension estimated from 3-dimensional facial scans using a craniometric equation: A retrospective clinical study","authors":"Louise Viel DDS, Virginie Chuy DDS, PhD, Justine Bouscasse DDS, Adrien Laran DDS, Adrien Naveau DDS, PhD","doi":"10.1016/j.prosdent.2026.06.023","DOIUrl":"10.1016/j.prosdent.2026.06.023","url":null,"abstract":"<div><h3>Statement of problem</h3><div>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.</div></div><div>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.</div><div><h3>Purpose</h3><div>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.</div></div><div>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.</div><div><h3>Material and methods</h3><div>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 <em>t</em> test (TOST) procedure using a predefined clinical equivalence margin of ±2 mm.</div></div><div>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 <em>t</em> test (TOST) procedure using a predefined clinical equivalence margin of ±2 mm.</div><div><h3>Results</h3><div>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.</div></div><div>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.</div><div><h3>Conclusions</h3><div>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, Zhifang Wang MDS, Wanxi Chen MDS, Mei Liu DDS, PhD","doi":"10.1016/j.prosdent.2026.07.011","DOIUrl":"10.1016/j.prosdent.2026.07.011","url":null,"abstract":"<div><h3>Statement of problem</h3><div><em>Staphylococcus aureus</em> (<em>S aureus</em>) and <em>Streptococcus mutans</em> (<em>S mutans</em>) 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.</div></div><div><em>Staphylococcus aureus</em> (<em>S aureus</em>) and <em>Streptococcus mutans</em> (<em>S mutans</em>) 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.</div><div><h3>Purpose</h3><div>The purpose of this in vitro study was to determine the antibacterial and antibiofilm function of Zn<sup>2+</sup> against <em>S aureus</em> and <em>S mutans</em> and assess gene expression changes to clarify its inhibitory mechanisms.</div></div><div>The purpose of this in vitro study was to determine the antibacterial and antibiofilm function of Zn<sup>2+</sup> against <em>S aureus</em> and <em>S mutans</em> and assess gene expression changes to clarify its inhibitory mechanisms.</div><div><h3>Material and methods</h3><div>Zn<sup>2+</sup> 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<sup>2+</sup> on key gene expression in <em>S aureus</em> and <em>S mutans</em> was evaluated by quantitative reverse transcription polymerase chain reaction (qRT-PCR).</div></div><div>Zn<sup>2+</sup> 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<sup>2+</sup> on key gene expression in <em>S aureus</em> and <em>S mutans</em> 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}

{"title":"Sponsoring Organizations and Liaisons","authors":"","doi":"10.1016/S0022-3913(26)00615-3","DOIUrl":"10.1016/S0022-3913(26)00615-3","url":null,"abstract":"","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"136 4","pages":"Page A2"},"PeriodicalIF":5.6,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149095616","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":"Feasibility of measuring condylar inclination from facial scans using eccentric interocclusal records across different intercondylar distances: An in vitro study using a TMJ simulation model","authors":"Woong-Gi Han DDS,&nbsp;Hong Seok Moon DDS, MSD, PhD,&nbsp;Jee-Hwan Kim DDS, MSD, PhD,&nbsp;Seoung-Jin Hong DMD, PhD,&nbsp;Jaeyoung Kim DDS, DMSc","doi":"10.1016/j.prosdent.2026.07.010","DOIUrl":"10.1016/j.prosdent.2026.07.010","url":null,"abstract":"&lt;div&gt;&lt;h3&gt;Statement of problem&lt;/h3&gt;&lt;div&gt;Although digital prosthodontic workflows have improved anatomic data acquisition for articulator mounting and jaw simulation, virtual articulator systems still commonly rely on average intercondylar distance values and standardized mounting procedures, limiting the simulation of patient-specific mandibular movement.&lt;/div&gt;&lt;/div&gt;&lt;div&gt;Although digital prosthodontic workflows have improved anatomic data acquisition for articulator mounting and jaw simulation, virtual articulator systems still commonly rely on average intercondylar distance values and standardized mounting procedures, limiting the simulation of patient-specific mandibular movement.&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 evaluate the feasibility of estimating sagittal condylar inclination (SCI) from facial scan-derived eccentric mandibular positional data in a temporomandibular joint (TMJ) simulation model and to investigate whether intercondylar distance influences measurement behavior.&lt;/div&gt;&lt;/div&gt;&lt;div&gt;The purpose of this in vitro study was to evaluate the feasibility of estimating sagittal condylar inclination (SCI) from facial scan-derived eccentric mandibular positional data in a temporomandibular joint (TMJ) simulation model and to investigate whether intercondylar distance influences measurement behavior.&lt;/div&gt;&lt;div&gt;&lt;h3&gt;Material and methods&lt;/h3&gt;&lt;div&gt;This study used a TMJ simulation model with intercondylar distance set at 5 levels (90, 100, 110, 120, and 130 mm) and SCI set at 4 levels (0, 15, 30, and 45 degrees). For each condition, facial scans at maximum intercuspation position (MIP), protrusive, right lateral, and left lateral positions were acquired as a single acquisition cycle, with 15 repeated cycles per condition. Eccentric scans were aligned to the MIP scan, and mandibular anterior transformation matrices were derived and mapped to the hinge axis to calculate SCI and the Bennett angle. Agreement between measured and actual SCI was evaluated using a mixed-effects Bland–Altman approach. Supportive analyses included linear regression, signed and absolute error, root mean square error (RMSE), mixed-effects modeling of SCI absolute error, and intraclass correlation coefficient (ICC) for repeatability.&lt;/div&gt;&lt;/div&gt;&lt;div&gt;This study used a TMJ simulation model with intercondylar distance set at 5 levels (90, 100, 110, 120, and 130 mm) and SCI set at 4 levels (0, 15, 30, and 45 degrees). For each condition, facial scans at maximum intercuspation position (MIP), protrusive, right lateral, and left lateral positions were acquired as a single acquisition cycle, with 15 repeated cycles per condition. Eccentric scans were aligned to the MIP scan, and mandibular anterior transformation matrices were derived and mapped to the hinge axis to calculate SCI and the Bennett angle. Agreement between measured and actual SCI was evaluated using a mixed-effects Bland–Altman approach. Supportive analyses included linear regres","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"136 4","pages":"Pages 1180-1190"},"PeriodicalIF":5.6,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148701584","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 “Restoration of endodontically treated teeth: A cost-effectiveness analysis of a one-piece endodontic crown versus a complete crown”","authors":"Nighat Naved BDS, FCPS (t),&nbsp;Asif R. Khowaja PhD,&nbsp;Fahad Umer BDS, FCPS, FICOI, FHEA (UK)","doi":"10.1016/j.prosdent.2026.05.055","DOIUrl":"10.1016/j.prosdent.2026.05.055","url":null,"abstract":"","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"136 4","pages":"Pages e141-e142"},"PeriodicalIF":5.6,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148352282","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":"Three-dimensional microdisplacement of teeth adjacent to dental implants: A pilot study","authors":"Cleber Davi Del Rei Daltro Rosa DDS, MSc, PhD,&nbsp;João Mateus Cavalaro Sayeg DDS, MSc,&nbsp;Victor Augusto Alves Bento DDS, MSc, PhD,&nbsp;Eduardo Miyashita DDS, MSc, PhD,&nbsp;Luiz Meirelles DDS, MSc, PhD,&nbsp;Eduardo Piza Pellizzer DDS, MSc, PhD","doi":"10.1016/j.prosdent.2026.06.016","DOIUrl":"10.1016/j.prosdent.2026.06.016","url":null,"abstract":"&lt;div&gt;&lt;h3&gt;Statement of problem&lt;/h3&gt;&lt;div&gt;Natural teeth exhibit viscoelastic, nonlinear 3-dimensional displacement, whereas osseointegrated implants behave as rigid, minimally mobile units. This biomechanical incompatibility generates asymmetric force distribution within tooth-implant complexes and may influence functional adaptation and proximal contact stability. Although digital methods now allow the precise in vivo detection of micromovements, the authors are unaware of a previous clinical study that simultaneously quantified the 3-dimensional kinematics of both the anterior and posterior teeth adjacent to a single implant, along with the implant-supported crown, under functional conditions. Therefore, the clinical geometric expression of displacement patterns within this system remains unclear.&lt;/div&gt;&lt;/div&gt;&lt;div&gt;Natural teeth exhibit viscoelastic, nonlinear 3-dimensional displacement, whereas osseointegrated implants behave as rigid, minimally mobile units. This biomechanical incompatibility generates asymmetric force distribution within tooth-implant complexes and may influence functional adaptation and proximal contact stability. Although digital methods now allow the precise in vivo detection of micromovements, the authors are unaware of a previous clinical study that simultaneously quantified the 3-dimensional kinematics of both the anterior and posterior teeth adjacent to a single implant, along with the implant-supported crown, under functional conditions. Therefore, the clinical geometric expression of displacement patterns within this system remains unclear.&lt;/div&gt;&lt;div&gt;&lt;h3&gt;Purpose&lt;/h3&gt;&lt;div&gt;This pilot study aimed to characterize the 3-dimensional displacement patterns of anterior and posterior teeth adjacent to single posterior implants and implant-supported crowns over time.&lt;/div&gt;&lt;/div&gt;&lt;div&gt;This pilot study aimed to characterize the 3-dimensional displacement patterns of anterior and posterior teeth adjacent to single posterior implants and implant-supported crowns over time.&lt;/div&gt;&lt;div&gt;&lt;h3&gt;Material and methods&lt;/h3&gt;&lt;div&gt;Eighteen patients contributed 23 posterior single dental implants. Serial intraoral scans were obtained by the same researcher using a standardized acquisition protocol at 4 time points: baseline (T0), 6 months (T1), 12 months (T2), and 18 months (T3). All datasets were subsequently superimposed for 3-dimensional analysis. The adjacent anterior and posterior teeth and the implant-supported crown served as internal controls for interstructural comparisons within each unit. Displacement was quantified along the buccolingual (X), coronoapical (Y), and mesiodistal (Z) axes at the mesial, middle, and distal regions. Temporal and structural differences were analyzed using 2-factor repeated-measures analysis of variance (ANOVA), followed by post hoc testing (α=.05).&lt;/div&gt;&lt;/div&gt;&lt;div&gt;Eighteen patients contributed 23 posterior single dental implants. Serial intraoral scans were obtained by the same researcher using a standardized acqu","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"136 4","pages":"Pages 1078-1085"},"PeriodicalIF":5.6,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148436547","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":"Color agreement between evaluation pastes and resin cements used with ceramic restorations: A systematic review and meta-analysis","authors":"Rüştü Ersoy Sakarya DDS,&nbsp;Hatice Özdemir DDS, PhD,&nbsp;Osayd Alawawda DDS,&nbsp;Ümmühan Çağlayan Akbulak DDS,&nbsp;Seçil Sakarya DDS,&nbsp;Memiş Özdemir DDS, PhD","doi":"10.1016/j.prosdent.2026.06.022","DOIUrl":"10.1016/j.prosdent.2026.06.022","url":null,"abstract":"<div><h3>Statement of problem</h3><div>Accurate shade matching between evaluation pastes and resin cements is essential for achieving optimal esthetic outcomes with ceramic restorations. However, variations in material composition, ceramic thickness, and optical properties may lead to perceptible color discrepancies.</div></div><div><h3>Purpose</h3><div>The purpose of this systematic review and meta-analysis was to evaluate the influence of evaluation pastes on the definitive color of ceramic restorations and determine whether they provide a reliable simulation of the shade obtained after resin cementation.</div></div><div><h3>Material and methods</h3><div>A comprehensive electronic search was conducted in the PubMed, Scopus, and Web of Science databases for studies published between January 2000 and September 2025. Eligible studies investigated color differences (ΔE or ΔE₀₀) between evaluation pastes and resin cements in ceramic restorations. Data extraction and quality assessment were performed independently by 2 reviewers using the QUIN tool. Pooled standardized mean differences (SMDs) were calculated using random-effects models, with Hartung–Knapp–Sidik–Jonkman adjustments for confidence intervals (α=.05).</div></div><div><h3>Results</h3><div>Seven studies were included in the meta-analysis. No statistically significant difference was found in color change between the evaluation and resin cementation stages for either ΔE (<em>P</em>=.744), with high heterogeneity (I²=96.76%), or ΔE₀₀ (SMD=–0.24; 95% CI:–1.48–1.00). In contrast, pooled analyses demonstrated a statistically significant difference between ΔE and ΔE₀₀ values for both evaluation pastes and resin cements (<em>P</em>&lt;.001)</div></div><div><h3>Conclusions</h3><div>Evaluation pastes provide a clinically acceptable and reliable estimation of the definitive restoration shade. Nevertheless, clinicians should consider ceramic translucency, cement brand, and application technique to minimize potential color variation.</div></div>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"136 4","pages":"Pages 1008-1016"},"PeriodicalIF":5.6,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148421750","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":"Lock versus merge: How software algorithms modulate the trueness of trim-rescan versus continuous digital scans in complex treatments","authors":"Aya M. Khalil BDS,&nbsp;Mohamed M. El Kateb BDS, MSD, PhD,&nbsp;Noha Morsy BDS, MSD, PhD","doi":"10.1016/j.prosdent.2026.06.027","DOIUrl":"10.1016/j.prosdent.2026.06.027","url":null,"abstract":"&lt;div&gt;&lt;h3&gt;Statement of problem&lt;/h3&gt;&lt;div&gt;The trim-rescan function has been advocated for capturing multiple finish lines, yet its accuracy appears inconsistent across studies. This discrepancy may stem from fundamental differences in how the intraoral scanner (IOS) software program handles scan alignment and merging, a factor poorly understood in the context of multiple preparations.&lt;/div&gt;&lt;/div&gt;&lt;div&gt;The trim-rescan function has been advocated for capturing multiple finish lines, yet its accuracy appears inconsistent across studies. This discrepancy may stem from fundamental differences in how the intraoral scanner (IOS) software program handles scan alignment and merging, a factor poorly understood in the context of multiple preparations.&lt;/div&gt;&lt;div&gt;&lt;h3&gt;Purpose&lt;/h3&gt;&lt;div&gt;This in vitro study aimed to investigate the influence of scanner-specific software algorithms by comparing the trueness of trim-rescan versus continuous scanning for a multi-abutment arch using 3 IOSs: the CS 3700 and Medit i700 (with \"lock\" feature) versus the CEREC Omnicam (without).&lt;/div&gt;&lt;/div&gt;&lt;div&gt;This in vitro study aimed to investigate the influence of scanner-specific software algorithms by comparing the trueness of trim-rescan versus continuous scanning for a multi-abutment arch using 3 IOSs: the CS 3700 and Medit i700 (with \"lock\" feature) versus the CEREC Omnicam (without).&lt;/div&gt;&lt;div&gt;&lt;h3&gt;Material and methods&lt;/h3&gt;&lt;div&gt;A maxillary definitive cast with 8 prepared abutments was fabricated via 3-dimensional (3D) printing. A laboratory scanner (Medit T710) provided the reference cast. The cast was scanned (&lt;em&gt;n&lt;/em&gt;=15 per group) using 3 IOSs (CS 3700, Medit i700, CEREC Omnicam) with both continuous and trim-rescan protocols. For trim-rescan, the protocol adhered to each scanner's unique software workflow. Trueness was assessed by computing the root mean square (RMS) error between test and reference scans after best-fit alignment. Data were analyzed using 2-way ANOVA, with complementary robust methods including Welch ANOVA and Games-Howell post hoc tests (α=.05). Effect sizes with 95% confidence intervals were calculated.&lt;/div&gt;&lt;/div&gt;&lt;div&gt;A maxillary definitive cast with 8 prepared abutments was fabricated via 3-dimensional (3D) printing. A laboratory scanner (Medit T710) provided the reference cast. The cast was scanned (&lt;em&gt;n&lt;/em&gt;=15 per group) using 3 IOSs (CS 3700, Medit i700, CEREC Omnicam) with both continuous and trim-rescan protocols. For trim-rescan, the protocol adhered to each scanner's unique software workflow. Trueness was assessed by computing the root mean square (RMS) error between test and reference scans after best-fit alignment. Data were analyzed using 2-way ANOVA, with complementary robust methods including Welch ANOVA and Games-Howell post hoc tests (α=.05). Effect sizes with 95% confidence intervals were calculated.&lt;/div&gt;&lt;div&gt;&lt;h3&gt;Results&lt;/h3&gt;&lt;div&gt;Scanner type significantly affected trueness (&lt;em&gt;P&lt;/em&gt;&lt;.001, partial η²=0.552, 95% CI [0.412 to 0.648]), w","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"136 4","pages":"Pages e47-e53"},"PeriodicalIF":5.6,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148421978","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":"Digital workflow optimization for complete mouth rehabilitation","authors":"Hongseok An DDS, MSD","doi":"10.1016/j.prosdent.2026.06.033","DOIUrl":"10.1016/j.prosdent.2026.06.033","url":null,"abstract":"<div><div>Advancements in the accuracy of intraoral scanners and virtual patient simulation technologies have facilitated the reliable implementation of fully digital workflows for complex prosthodontic procedures, including complete mouth rehabilitation. Although numerous technologies and workflows have been introduced, some necessitate extensive armamentarium or additional procedural steps, thereby limiting their practical applicability. This video presentation outlines a relatively straightforward, yet predictable digital workflow designed for extensive fixed prosthodontic procedures in dentate patients.</div></div><div>Advancements in the accuracy of intraoral scanners and virtual patient simulation technologies have facilitated the reliable implementation of fully digital workflows for complex prosthodontic procedures, including complete mouth rehabilitation. Although numerous technologies and workflows have been introduced, some necessitate extensive armamentarium or additional procedural steps, thereby limiting their practical applicability. This video presentation outlines a relatively straightforward, yet predictable digital workflow designed for extensive fixed prosthodontic procedures in dentate patients.</div>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":"136 4","pages":"Pages e1-e3"},"PeriodicalIF":5.6,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148536229","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}