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

{"title":"A digital multifunctional device for creating an edentulous dynamic virtual patient: A dental technique.","authors":"Chu-Chi Huang, Sungyong Ban, Sang J Lee, Shun-Cong Xu, Jason D Lee","doi":"10.1111/jopr.70065","DOIUrl":"10.1111/jopr.70065","url":null,"abstract":"<p><p>This paper presents a digital technique for creating a dynamic edentulous virtual patient using a 3-dimensional (3D) printed multifunctional intraoral device. By integrating custom impression trays, occlusal rims, a gothic arch tracer, facial scan markers, and an optical jaw tracking device, this multifunctional device allows capturing essential diagnostic datasets in one visit and enables unified alignment within computer-aided design (CAD) software. This approach addresses current key limitations, such as the lack of stable tracking references and difficulties in aligning intraoral and facial scans.</p>","PeriodicalId":49152,"journal":{"name":"Journal of Prosthodontics-Implant Esthetic and Reconstructive Dentistry","volume":" ","pages":"1383-1388"},"PeriodicalIF":3.6,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145656065","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 sintering cycle on the strength and translucency of multilayered zirconia.","authors":"Kedith Sawangsri, Steven Makowka, Sompop Bencharit, Hyeongil Kim","doi":"10.1111/jopr.13956","DOIUrl":"10.1111/jopr.13956","url":null,"abstract":"<p><strong>Purpose: </strong>A newly introduced sintering protocol promises to offer higher translucency while not significantly compromising the flexural strength of the material. However, the effect of the novel sintering protocol has not been thoroughly validated. The purpose of this study was to measure and compare the effect of two sintering protocols on the translucency and flexural strength of two multilayered zirconia materials.</p><p><strong>Materials and methods: </strong>Two types of multilayered zirconia materials (ZirCAD Prime and Prime esthetic) were selected. Presintered disk specimens were obtained from Translucent, Gradient, and Dentin layers (n = 20). The disks were allocated to 2 groups: standard sintering protocol (peak temperature 1500°C) and high translucency sintering protocol (peak temperature 1600°C). After the sintering process, 10 specimens from each group were randomly selected. The optical values (L^*, a^*, b^*) were measured and used to assess translucency using the relative translucency parameter (RTP₀₀) and translucency differences (ΔRTP₀₀). Then, all 20 specimens were tested for biaxial flexural strength. The outcomes were analyzed. The analysis of variance is used to analyze any significant effects on translucency and flexural strength. Then, any significant difference in the translucency and flexural strength between all pairs of materials was analyzed using Bonferroni-corrected Student's t-test (α = 0.05).</p><p><strong>Results: </strong>The high translucency sintering protocol significantly decreased biaxial strength in the Prime translucent and dentine layer, Prime esthetic translucent, and gradient layer. RTP₀₀ was significantly reduced in the Prime gradient and Prime esthetic gradient layer when sintered with a high translucency protocol. The lowest ΔRTP₀₀ was observed in the Prime dentine layer, while the highest ΔRTP₀₀ was observed in the Prime esthetic dentin layer.</p><p><strong>Conclusions: </strong>High translucency protocol significantly lowers the biaxial flexural strength of both multilayered materials, but the alteration in translucency is within clinically acceptable thresholds (TAT₀₀ = 2.62).</p>","PeriodicalId":49152,"journal":{"name":"Journal of Prosthodontics-Implant Esthetic and Reconstructive Dentistry","volume":" ","pages":"1350-1357"},"PeriodicalIF":3.6,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13639819/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142330822","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":"Comparison of full-arch mandibular reconstruction with dental implants using completely splinted or segmentally splinted prostheses with two different occlusal schemes: A finite-element analysis.","authors":"Sarah Abrishamkar, Amirhossein Fathi, Mahsa Ghorbani, Ramin Mosharraf","doi":"10.1111/jopr.13954","DOIUrl":"10.1111/jopr.13954","url":null,"abstract":"<p><strong>Purpose: </strong>This study aimed to comparatively analyze full-arch mandibular reconstruction using dental implants. It focused on two distinct prosthesis configurations: completely splinted and segmentally splinted. These configurations were evaluated under two different occlusal schemes-group function and canine guidance-utilizing finite element analysis (FEA).</p><p><strong>Materials and methods: </strong>The methodology involved developing three-dimensional finite element models from computed tomography data acquired from an edentulous patient. Six dental implants were utilized to complete the mandibular reconstruction. Prosthetic reconstruction was conducted with completely and segmentally splinted prostheses, each employing group function and canine guidance occlusal schemes. Consequently, four distinct models were analyzed. Following meshing, a 200 N load was applied at a 30-degree angle. Subsequent evaluation encompassed stress, strain distribution, and the overall deformation of the implants, crowns, and underlying bone structure assessment.</p><p><strong>Results: </strong>The group function occlusal scheme generally exhibited lower stress values than the canine guidance occlusal scheme, with three-piece prostheses demonstrating even lower stress levels than one-piece prostheses. Conversely, the canine guidance occlusal scheme exhibited higher stress values overall.</p><p><strong>Conclusion: </strong>The findings of this study may assist clinicians in selecting the most effective occlusal scheme and prosthetic configuration for implant-supported mandibular restorations, potentially enhancing treatment outcomes and reducing the risk of mechanical complications. In summary, results indicated that group function loading, irrespective of prosthesis type, offers more uniform load distribution and lower stress values, making it a preferable choice over canine guidance. Within the group function occlusal scheme, three-piece prostheses demonstrated lower stress values than one-piece prostheses, but the clinical significance of this difference appears to be minimal.</p>","PeriodicalId":49152,"journal":{"name":"Journal of Prosthodontics-Implant Esthetic and Reconstructive Dentistry","volume":" ","pages":"1369-1377"},"PeriodicalIF":3.6,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142299329","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 various polishing processes on surface morphology, corrosion resistance, and RPD framework adaptation of SLM-printed dental Co-Cr alloys.","authors":"Jiawen Gan, Hanzhi Zhang, Jian Sun, Chenyuan Zhu, Ting Jiao","doi":"10.1111/jopr.70013","DOIUrl":"10.1111/jopr.70013","url":null,"abstract":"<p><strong>Purpose: </strong>This in vitro study aims to compare the effects of electrolytic polishing (EP), plasma electrolytic polishing (PP), dry electropolishing (DP), and their combination on the surface characteristics, corrosion resistance, and material reduction of selective laser melting (SLM) printed dental cobalt-chromium (Co-Cr) alloy.</p><p><strong>Materials and methods: </strong>Standard samples and removable partial denture (RPD) frameworks were SLM-printed and then polished using the following methods: mechanical polishing (MP), EP, PP, DP, PDP (PP + DP), DPP (DP + PP), and PDPP (PP + DP + PP). Surface characteristics were analyzed using optical profilometry, scanning electron microscopy (SEM), and x-ray photoelectron spectroscopy (XPS). Corrosion resistance was assessed through electrochemical testing and ion release experiments. The metal reduction was evaluated by measuring weight loss, major connector and clasp thickness loss, and framework adaptation. The post-processing time for the technician's fine polishing of these frameworks was recorded to further evaluate the polishing quality of the frameworks. All measurements were presented as mean ±standard deviation. Statistical data were analyzed using analysis of variance (ANOVA) and nonparametric one-way analysis.</p><p><strong>Results: </strong>The MP group exhibited the lowest roughness (0.04 ± 0.01 µm), followed by the PDPP group (0.49 ± 0.12 µm). All groups had a passivation film composition predominantly composed of Cr₂O₃, with a small amount of CrO₃ observed in the PDP group. PDPP exhibited minimal ion release (0.12 µg/cm²) and stable Nyquist plots. PDPP can significantly reduce the technician's post-processing time (45.75 s, p < 0.05) without compromising the adaptation of the frameworks.</p><p><strong>Conclusions: </strong>PDPP forms a stable passivation film with extremely low ion release and a highly smooth, uniform surface. This significantly reduces the time required for manual post-processing while maintaining the accuracy of RPD frameworks, making it highly suitable for large-scale clinical framework polishing.</p>","PeriodicalId":49152,"journal":{"name":"Journal of Prosthodontics-Implant Esthetic and Reconstructive Dentistry","volume":" ","pages":"1358-1368"},"PeriodicalIF":3.6,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144976037","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":"Implant facilitated molar uprighting using CAD-CAM technology.","authors":"Brent A Talbot, Steven E Handel, Andrew S Ryser, Jennifer V Sabol, Stona Jackson","doi":"10.1111/jopr.14053","DOIUrl":"10.1111/jopr.14053","url":null,"abstract":"<p><p>The ramifications of tooth loss include poor masticatory ability and also changes to the associated retained teeth. Mesial drift of adjacent teeth may hinder ideal rehabilitation. Uprighting of mesially titled teeth can allow for implant restorations with more ideal contours. Uprighting of mesially titled teeth can be achieved through orthodontic treatment which can be assisted by dental implants for anchorage. This article introduces an osseointegrated implant- supported device called the Implant Supported Distalising Piston (ISDP) to upright two mesially tilted mandibular second molars. Two patients presented to a prosthodontics practice with implants placed several years before seeking prosthodontics treatment. The mandibular second molars were mildly mesially tilted and encroached on the space needed to design implant-supported crowns with ideal contours. CAD-CAM technology was used to design implant-supported zirconia crowns with a distalising piston placed into the distal of the crown to upright a mesially titled molar. The Implant Supported Distalising Piston successfully corrected two mesially titled molars to allow for a more ideal implant restoration.</p>","PeriodicalId":49152,"journal":{"name":"Journal of Prosthodontics-Implant Esthetic and Reconstructive Dentistry","volume":" ","pages":"1378-1382"},"PeriodicalIF":3.6,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143711694","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":"Comparing the accuracy of wet and dry milled denture bases combined with printed and milled teeth.","authors":"Muhammad Amr Nabil, Yasmine Galaleldin Thabet, Marwa Ezzat Sabet, Tarek Mohamed Al Sayed El Saaedi","doi":"10.1111/jopr.70251","DOIUrl":"https://doi.org/10.1111/jopr.70251","url":null,"abstract":"<p><strong>Purpose: </strong>To evaluate the accuracy of wet and dry milled denture bases combined with printed or milled denture teeth.</p><p><strong>Materials and methods: </strong>In this in vitro study, denture bases were manufactured using wet milled denture bases (Group I) dry milled denture bases (Group II). Teeth were milled by the same technique in Subgroup A in both groups, and they were printed in Subgroup B in both groups. All the dentures were scanned, and the data were imported to surface-matching software to evaluate the accuracy of the teeth positions, the intaglio surfaces, as well as the overall accuracy of the denture. Statistical analysis was done using two-way ANOVA for the accuracy of teeth positions and overall accuracy of the dentures, and unpaired t-test for the accuracy of the intaglio surfaces. The significance level was set at p ≤ 0.05.</p><p><strong>Results: </strong>Regarding the accuracy of teeth positions, the highest deviation (0.225 ± 0.0142 mm) was found in Group IIA (dry milled denture bases with dry milled teeth), whereas the least deviation (0.1332 ± 0.0236 mm) was found in Group IB (wet milled denture bases with printed teeth). On the other hand, regarding the accuracy of the intaglio surfaces, Group II (dry milled denture bases) showed more deviation (0.057175 ± 0.0111 mm) compared to Group I (wet milled denture bases) (0.043975 ± 0.009 mm). For the overall accuracy of the dentures, the highest deviation (0.1297 ± 0.0062 mm) was found in Group IIA (dry milled denture bases with dry milled teeth), whereas the least deviation (0.0937 ± 0.0132 mm) was found in Group IB (wet milled denture bases with printed teeth).</p><p><strong>Conclusions: </strong>The most accurate teeth positions were obtained using printed teeth combined with wet milled denture bases. The most accurate intaglio surfaces were achieved using the wet milling technique. Overall accuracy was highest in dentures manufactured via wet milling of denture bases and 3D printing of denture teeth.</p>","PeriodicalId":49152,"journal":{"name":"Journal of Prosthodontics-Implant Esthetic and Reconstructive Dentistry","volume":" ","pages":""},"PeriodicalIF":3.6,"publicationDate":"2026-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149117399","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":"Biomechanical impact of anterior cantilever length on subperiosteal implants with different materials and configurations.","authors":"Bersu Bedirhandede, Beyza Güney, Dilan Gizem Doğan, Barış Erkut Türk","doi":"10.1111/jopr.70247","DOIUrl":"https://doi.org/10.1111/jopr.70247","url":null,"abstract":"<p><strong>Purpose: </strong>The aim of this study was to evaluate the influence of anterior cantilever length on stress distribution in subperiosteal implants (SI) fabricated from titanium and 60% carbon fiber-reinforced polyetheretherketone (PEEK) with one-piece and two-piece configurations using finite element analysis.</p><p><strong>Materials and methods: </strong>Sixteen three-dimensional finite element models of an atrophic maxilla were constructed, incorporating one-piece and two-piece SI designs fabricated from titanium and 60% carbon fiber-reinforced PEEK with anterior cantilever lengths of 0, 2, 4, and 6 mm. All materials were assumed isotropic, homogeneous, and linearly elastic. A 100 N oblique load at 45° was applied to the palatal region of the maxillary anterior teeth in a labio-apical direction to simulate anterior functional loading. Maximum principal stress, minimum principal stress, and von Mises stress were evaluated in the supporting bone, implant body, fixation screws, and prosthetic bar.</p><p><strong>Results: </strong>Maximum and minimum principal stress values in the supporting bone progressively increased with cantilever length, with minimal material-related differences. Fixation screw von Mises stress values increased with cantilever length and were consistently higher in one-piece than in two-piece designs. Prosthetic bar von Mises stress values peaked at 2 mm. Subperiosteal implant von Mises stress values increased with cantilever length and were substantially higher in two-piece designs than in one-piece designs.</p><p><strong>Conclusions: </strong>Anterior cantilever length influences stress distribution in subperiosteal implant-supported prostheses, with stress magnitudes increasing proportionally to cantilever extension regardless of material or configuration.</p>","PeriodicalId":49152,"journal":{"name":"Journal of Prosthodontics-Implant Esthetic and Reconstructive Dentistry","volume":" ","pages":""},"PeriodicalIF":3.6,"publicationDate":"2026-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149117413","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":"Edge chipping and translucency comparison among lithium silicate-based ceramics.","authors":"Essa A Alghamdi, Geoffrey A Thompson, Shengtong Han, Jeffrey M Toth, David W Berzins","doi":"10.1111/jopr.70246","DOIUrl":"https://doi.org/10.1111/jopr.70246","url":null,"abstract":"<p><strong>Purpose: </strong>Lithium disilicate glass-ceramics have excellent esthetic characteristics, but lack the strength of zirconia. Some newer lithium silicates now contain zirconia and are marketed as \"zirconia-reinforced\" with the implication that they are improved in strength. The purpose of this study was to determine the edge chip resistance/toughness and translucency of lithium silicate-based glass-ceramics.</p><p><strong>Materials and methods: </strong>Four lithium silicate/disilicate glass-ceramic materials, IPS e.max CAD-HT/MT and GC Initial LiSi-HT/LT blocks, and two zirconia-lithium silicate glass-ceramic materials, VITA Suprinity PC and Celtra Duo, were tested (N = 20/group). Specimens (14 × 12 × 1.5 mm) were sectioned from commercially available chairside CAD-CAM blocks, fired (if indicated), ground, and polished. Translucency was assessed via a spectrophotometer. For edge chipping, specimens were adhered to a resin bed. Edge chips were produced using a 120-degree sharp, diamond indenter mounted in a universal testing machine with the specimen's edge positioned at distances ranging from approximately 0.4 to 1 mm horizontally from the indenter tip. Translucency was compared with one-way ANOVA and edge chipping was evaluated with regression and Kruskal-Wallis tests.</p><p><strong>Results: </strong>Significant differences in translucency parameter (TP₀₀) were found between the materials (p ≤ 0.001). The statistical ranking of the TP₀₀ was: GC Initial LiSi-HT > IPS e.max CAD-HT > Celtra Duo > GC Initial LiSi-LT > VITA Suprinity PC = IPS e.max CAD-MT. For edge chipping, VITA Suprinity PC and Celtra Duo had significantly (p <0.05) lower edge chip resistance (R_eA) than IPS e.max CAD HT, but all other comparisons were not significant.</p><p><strong>Conclusions: </strong>The incorporation of zirconia in lithium silicate glass-ceramics did not result in superior edge chip resistance. Moreover, VITA Suprinity PC was more opaque than the other tested ceramics except IPS e.max CAD-MT.</p>","PeriodicalId":49152,"journal":{"name":"Journal of Prosthodontics-Implant Esthetic and Reconstructive Dentistry","volume":" ","pages":""},"PeriodicalIF":3.6,"publicationDate":"2026-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149076415","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 post-print cleaning protocol on mechanical, optical, and conversion characteristics of two 3D-printed resin composites for definitive crowns.","authors":"Ting-Chia Liu, Princy Thakkar, Zachary G Cuny, Nathaniel C Lawson, Neeraj Surathu, Amir H Nejat","doi":"10.1111/jopr.70248","DOIUrl":"https://doi.org/10.1111/jopr.70248","url":null,"abstract":"<p><strong>Purpose: </strong>To evaluate the influence of post-print cleaning protocols on the biaxial flexural strength, degree of conversion, and translucency of two 3D-printed definitive crown materials with differing filler content.</p><p><strong>Materials and methods: </strong>Lower-filled (Detax Crown; 24.4 wt% filler) and higher-filled (Rodin Sculpture 2.0; 60.2 wt% filler) 3D-printed crown materials were subjected to five cleaning conditions: isopropyl alcohol for 5 s (IPA-5s) or 60 s (IPA-60s), Rodin Universal Resin Cleaner, Harvest InovaPrint Wash, or Saremco Print Cleaning Concentrate. Biaxial flexural strength (ISO 4049:2019), degree of conversion, and translucency were measured, and surface morphology was assessed by scanning electron microscopy (SEM). Two-way ANOVA with Bonferroni adjustment and Spearman correlations were applied (α = 0.05).</p><p><strong>Results: </strong>IPA-5s produced the numerically highest flexural strength in both materials, significantly so only for Sculpture 2.0, whereas Harvest and Saremco produced the lowest, and Rodin intermediate. IPA-60s reduced the strength for Sculpture 2.0 (p < 0.001) but not for Detax Crown (p = 0.539). Sculpture 2.0 showed significant translucency reductions with all conditions except IPA-5s, whereas Detax Crown translucency remained stable. IPA-5s also produced the highest degree of conversion for both materials, with an exploratory correlation between mean flexural strength and mean degree of conversion across protocols (n = 5 group means per material), reaching significance only for Detax Crown (r_s = 0.900, p = 0.037). SEM showed well-embedded filler in Detax Crown across conditions, whereas Sculpture 2.0 showed greater filler exposure variability.</p><p><strong>Conclusion: </strong>All alternative cleaning protocols reduced flexural strength and degree of conversion in both materials, but the optical response was material-specific. Translucency varied only slightly in the lower filled material, whereas the higher filled material showed marked translucency loss with every protocol other than a 5-s IPA wash. Extending IPA exposure from 5 to 60 s reduced strength, degree of conversion, and translucency in the higher filled material but not the lower filled material. Strength loss was accompanied by reduced degree of conversion in the lower filled material and, in the higher filled material, additionally by opacification and greater filler exposure on SEM.</p>","PeriodicalId":49152,"journal":{"name":"Journal of Prosthodontics-Implant Esthetic and Reconstructive Dentistry","volume":" ","pages":""},"PeriodicalIF":3.6,"publicationDate":"2026-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149070304","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":"Statistical shape modeling for digital nasal prosthesis design: Subjective and anthropometric validation.","authors":"Tjitske Bannink, Evie H M Graus, Maarten J A van Alphen, Michiel W M van den Brekel, M Baris Karakullukçu","doi":"10.1111/jopr.70243","DOIUrl":"https://doi.org/10.1111/jopr.70243","url":null,"abstract":"<p><strong>Purpose: </strong>Conventional nasal prosthesis design strongly depends on the artistic skills and experience of the anaplastologist. Digital approaches may reduce this dependency by automating patient-specific nasal shape generation. Statistical shape modeling (SSM) enables computation of a nose that aligns with an individual's facial morphology.</p><p><strong>Materials and methods: </strong>Fifty participants without facial deformities underwent three-dimensional (3D) facial scanning using an Artec Space Spider optical scanner. For each participant, the original nose (OG-nose) was digitally removed to create a standardized artificial nasal defect. An SSM-based algorithm reconstructed a nasal shape (SSM-nose), which was positioned on the facial model. A blinded assessment panel of participants, healthcare professionals, and patients evaluated randomized facial models featuring either the OG-nose or SSM-nose. Standardized questionnaires assessed natural appearance, aesthetics, notability, and facial harmony, and specific nasal characteristics (size, width, shape, depth, and pose). A paired-comparison questionnaire asked assessors to indicate their preferred nose. Objective comparison used predefined anthropometric measurements.</p><p><strong>Results: </strong>Pooled analysis revealed significant differences for natural appearance and fit to the face, with SSM-noses rated lower than OG-noses. Case-wise comparisons, however, revealed no significant differences between OG-nose and SSM-nose ratings. In the paired preference assessment, healthcare professionals selected the OG-nose in 47% and the SSM-nose in 41% of cases; participants preferred the OG-nose in 71% and the SSM-nose in 17%. Several anthropometric parameters differed significantly, though absolute differences were small. Differences mainly concerned nasal projection, with reduced nasal bridge height (-1.9 mm), pronasale depth (-4.1 mm), and columella length (-3.9 mm), accompanied by corresponding angular changes, indicating slightly reduced protrusion in SSM-noses.</p><p><strong>Conclusions: </strong>SSM‑based nasal reconstructions were largely comparable to original noses, supporting the feasibility of this approach for digital anaplastology, although systematic under‑projection indicates the need for further model refinement.</p>","PeriodicalId":49152,"journal":{"name":"Journal of Prosthodontics-Implant Esthetic and Reconstructive Dentistry","volume":" ","pages":""},"PeriodicalIF":3.6,"publicationDate":"2026-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149041721","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}