The Journal of oral implantology最新文献

{"title":"Von Mises Equivalent Stresses Developed in Fixed Partial Denture Infrastructures on Implants According to Changes in Their Prosthetic Materials.","authors":"Marcelo Bighetti Toniollo, Kalyta Esteves Martins Dos Reis, Silvio Pedro da Silva Sakamoto, Andrea Sayuri Silveira Dias Terada, Luiz Renato Paranhos, Ana Paula Macedo, Renato Canevari Dutra da Silva, Pedro Henrique Justino Oliveira Limirio","doi":"10.1563/aaid-joi-D-24-00153","DOIUrl":"10.1563/aaid-joi-D-24-00153","url":null,"abstract":"<p><p>Fixed partial prosthesis with a suspended intermediate element on implants (pontic) can reduce costs and/or make viable cases with limitations in the supporting bone structure. Greater biomechanical demands on the system and variation in the materials of the prosthetic infrastructures could interfere with the stresses developed. This study aimed to verify and compare these stresses in prosthetic infrastructures according to the variation in the material used to make them. The von Mises equivalent stresses (VMES) were qualitatively and quantitatively analyzed in the most significant stress areas in these infrastructures, which were divided into different experimental groups: cobalt-chrome (CoCr); nickel-chromium (NiCr); titanium (Ti); zirconia (Zr); lithium disilicate (LD); type IV gold (Au); and acrylic resin (AR). They were then analyzed using the finite element method (FEM) to verify the stresses developed, as well as their intensity and scope, using a color scale generated in a virtual computer analysis environment (Ansys Workbench Software). The results allowed us to observe that different stresses are generated in the material used in the prosthetic infrastructure, depending on its variation. A directly proportional relationship was found between the stiffness of the material and the stresses generated, meaning that greater rigidity results in greater stresses. It is important to highlight that there was no imminent risk of harm to the biomechanics in any varying situation in the infrastructure material, except acrylic resin, which reached stress thresholds in the prosthetic structure close to its maximum flexural resistance.</p>","PeriodicalId":519890,"journal":{"name":"The Journal of oral implantology","volume":" ","pages":"267-274"},"PeriodicalIF":1.3,"publicationDate":"2025-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143653027","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparison of Subperiosteal Implant Designs Applied to Atrophic and Edentulous Mandible Under Traumatic Forces: 3D Finite Element Analysis.","authors":"Ilgın Arı, Gülin Acar, İpek Dilara Baş, Emre Tosun","doi":"10.1563/aaid-joi-D-25-00073","DOIUrl":"10.1563/aaid-joi-D-25-00073","url":null,"abstract":"<p><p>This study evaluated the stress distributions of subperiosteal implants (SPI) made of titanium and polyetheretherketone (PEEK) in 1-piece and 2-piece designs in edentulous and severely atrophic mandibles subjected to trauma forces. This study applied 4 treatment methods to a severely atrophic edentulous mandibular model. Subperiosteal implant designs made of PEEK consisting of 1 piece in model 1 and two in model 2 were used. Subperiosteal implant designs made of titanium composed of 1 piece in model 3 and two in model 4 were used. Each of the subperiosteal implants was fixed on the mandibular model with 14 osteosynthesis screws placed in the tension lines of the mandible. A traumatic force of 2000 N was applied to the mandibular prosthesis in the anteroposterior direction. Maximum principal stress (Pmax), minimum principal stress (Pmin), and Von Mises stress (VMs) values were measured in MPa. In this study, model 3 showed the highest Pmax value in the symphysis region (45.888 MPa), whereas the values in the other models were similar. The mandibular condyle had the highest Pmax in model 2 (941.338 MPa) and the lowest in model 3 (905.756 MPa). All models compared the Pmin values measured in the symphysis, alveolar crest, and condyle region. The VM stress values on the abutments and abutment screws were lower and more stable in PEEK SPI models than titanium SPI models. However, VMs values on titanium SPI metal frameworks were lower than PEEK SPI models. In this finite element analysis, 1-piece PEEK SPI were the most advantageous design regarding mandibular fracture risk when evaluated under traumatic forces. PEEK SPI treatment may provide a less invasive treatment model for patients with severely atrophic mandibles. Additionally, 2-piece subperiosteal implants may provide greater design flexibility in clinical applications and offer advantages in stress distribution, expanding the range of treatment options available to clinicians.</p>","PeriodicalId":519890,"journal":{"name":"The Journal of oral implantology","volume":" ","pages":"295-303"},"PeriodicalIF":0.0,"publicationDate":"2025-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144083108","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Patient Perspectives on Immediate Zirconia Implant Therapy: Results from a Long-term Multicenter European Study.","authors":"Etyene Schnurr, Mario Parra, Robert Bauder, Fabian Schick, Benedikt Langwieder, Dominik Nischwitz, J L Rutkowski","doi":"10.1563/aaid-joi-D-25-00111","DOIUrl":"https://doi.org/10.1563/aaid-joi-D-25-00111","url":null,"abstract":"<p><p>This multicenter study investigated patient-reported outcome measures (PROMs) following immediate placement of zirconia dental implants. Fifty-four patients from Austria, Spain, and Germany received 272 implants and completed the PROM questionnaires before implantation (T0) and at the time of definitive prosthetic restoration (T1). Patient experiences were assessed using a visual analog scale (VAS) across the following five domains: functional limitations, psychological discomfort, physical pain, physical and social disability, and handicap. The follow-up duration was 8.1 ± 1.5 years, with a 100% implant survival rate. Overall patient satisfaction rate improved from 77.88% at T0 to 94.99% at T1 (P < .0001). Significant correlations were observed between higher VAS scores at T0 and clinical variables, such as implant diameter, number of implants placed, use of augmentation procedures, and loading timing. Qualitative differences between the participating countries were also noted, with Spanish patients reporting the most significant reduction in VAS scores from T0 to T1. This study highlights the importance of integrating PROMs in implant dentistry to address the efficacy-effectiveness gap and support a value-based care model. The results demonstrated high long-term patient satisfaction and acceptance of immediately placed zirconia implants in diverse clinical settings.</p>","PeriodicalId":519890,"journal":{"name":"The Journal of oral implantology","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144500092","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ridge dimensional change at implant sites and implant adjacent teeth after early implant placement with contour augmentation: A retrospective clinical study.","authors":"Jing-Rong Lin, Yu-Jui Hsu, Lian-Ping Mau, Chung-Han Ho, Hsi-Chien Yu","doi":"10.1563/aaid-joi-D-24-00189","DOIUrl":"https://doi.org/10.1563/aaid-joi-D-24-00189","url":null,"abstract":"<p><p>Implant placement is often combined with contour augmentation surgery, involving flap elevation and material placement extending to the ridges of adjacent teeth. This study evaluated horizontal ridge dimensional changes and the stability of the implant site and adjacent teeth in the esthetic zone following early implant placement with contour augmentation. Twenty-one patients received maxillary incisor single implant placement with contour augmentation. Alginate impressions were taken before tooth extraction (T0) and at 1-year follow-up (T1), and stone casts were scanned using a desktop 3D scanner to generate stereolithography (STL) files. Horizontal ridge dimensions were measured at 0, 1, 3, and 5 mm below the mucosal margin at the groups of implant site (I), mesial tooth (MI), distal tooth (DI), and contralateral canine (C). Results indicated significant differences in ridge dimensions between T0 and T1 at the 3-mm and 5-mm levels in Group MI (P < 0.05). No significant differences were observed among the four groups at any level. Early implant placement with contour augmentation appeared to maintain the facial-palatal ridge dimension close to pre-extraction width, suggesting acceptable hard and soft tissue stability in the esthetic zone after 1 year, with no consistent adverse effects on ridges of adjacent teeth.</p>","PeriodicalId":519890,"journal":{"name":"The Journal of oral implantology","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144478442","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dental Implants: Adjacent Tooth Proximity and Contact.","authors":"Dennis Flanagan","doi":"10.1563/aaid-joi-D-24-00188","DOIUrl":"https://doi.org/10.1563/aaid-joi-D-24-00188","url":null,"abstract":"<p><p>During the osteotomy and placement of dental implants, anatomical positions of adjacent natural teeth to a dental implant site may be very close or in actual contact. This can be due to anatomy, the size of the implant site, a misguided osteotomy, drifting, or migration of the adjacent tooth. The implant surgeon needs to be aware of the position of adjacent teeth to avoid root damage from the implant drill or the implant itself. The dimension of 1.5mm space has been discussed, but it is an arbitrary speculative dimension. There is no agreed-upon \"safe\" proximity to adjacent tooth roots. Theoretically, a large displacement size of an implant may inhibit bone remodeling and cause bone loss if placed close to an adjacent tooth. A small diameter or mini-implant may not significantly affect bone remodeling when placed in close proximity or even in contact with an adjacent tooth root. Many factors dictate \"safe\" proximity, including the implant diameter, tooth root displacement, periodontal ligament, bone quality, and patient physiologic factors, including diseases and medications. The degree of root contact by an implant or implant drill may be graded by the contact depth. Grade 1 is contact with periodontal ligament, Grade 2 is contact with periodontal ligament and cementum, Grade 3 is contact with periodontal ligament, cementum, and dentin penetration, and Grade 4 is contact with periodontal ligament, cementum, root dentin, and pulpal penetration. This discussion highlights the need for further research on dental implant proximity and contact with adjacent teeth.</p>","PeriodicalId":519890,"journal":{"name":"The Journal of oral implantology","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144319149","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Management of a Severe Peri-implantitis Case Using Titanium Mesh Technique with Xenogenic Bone Substitute and Collagen Matrix: A 4-Year Follow-up.","authors":"Mahdi Kadkhodazadeh, Ali Azadi","doi":"10.1563/aaid-joi-D-24-00177","DOIUrl":"https://doi.org/10.1563/aaid-joi-D-24-00177","url":null,"abstract":"<p><p>A 64-year-old female patient was referred for the treatment of peri-implantitis around an implant at site 46. Bleeding on probing, excessive probing depth and extensive bone loss (more than 50% of the implant length) were evident around the implant. Moreover, the implant site suffered from a lack of keratinized mucosa at the buccal side. The patient received a sequence of cleaning with a titanium brush, decontamination with tetracycline paste, H2O2 and saline, titanium mesh placement, use of xenogenic bone substitute, and eventually, covering the area with a xenogenic collagen matrix. Four years' results showed favorable probing depth, bone gain (more than 80% of the implant length), lack of bleeding on probing, and formation of a keratinized mucosal rim at the buccal side. In the presented case, the mesh technique with xenogenic bone substitute and collagen matrix effectively manages a severe peri-implantitis case.</p>","PeriodicalId":519890,"journal":{"name":"The Journal of oral implantology","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144218024","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Simplification of the Bone Shell Technique for Lateral Mandibular Ridge Augmentation.","authors":"David Yang, Jason Choi, Kenneth Chow, Dimitrios Karastathis, Danny H Kim","doi":"10.1563/aaid-joi-D-25-00024","DOIUrl":"https://doi.org/10.1563/aaid-joi-D-25-00024","url":null,"abstract":"<p><p>The bone shell approach to lateral ridge augmentation has overcome many limitations of the classic block graft and guided bone regeneration approaches. Surgical complexity and expensive dedicated armamentarium may partially explain why it has not yet become ubiquitously adopted. We propose a screwless simplification of the bone shell approach concerning the posterior mandible lateral defect. Two cases are described to highlight the unique aspects of each case.</p>","PeriodicalId":519890,"journal":{"name":"The Journal of oral implantology","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144218027","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"NASAL FLOOR AUGMENTATION: RETROSPECTIVE OBSERVATIONS FOR NASAL PASSAGE VOLUME AND BREATHING FUNCTION.","authors":"Emine Fulya Akkoyun, Taha Pergel, Mustafa Aras Sürücü, Emine Berke Keskinnişanci, Doğan Dolanmaz","doi":"10.1563/aaid-joi-D-24-00202","DOIUrl":"https://doi.org/10.1563/aaid-joi-D-24-00202","url":null,"abstract":"<p><p>The rehabilitation of the atrophic maxilla poses a significant challenge, especially in cases with limited bone height. Nasal floor augmentation has been proposed to improve bone height in the anterior maxilla. However, its effects on nasal function and passage volume have not been thoroughly investigated. The objective of this study was to evaluate the correlation between nasal passage volume changes and patient-reported nasal obstruction after nasal floor augmentation using the Nasal Obstruction Symptom Evaluation (NOSE) scale. This retrospective study included patients undergoing iliac bone grafting and nasal floor augmentation for the rehabilitation of severely atrophic maxilla. Nasal passage volume alterations were measured using cone beam computed tomography, and nasal function was assessed using the NOSE scale. The correlation between NOSE scores and volume changes was analyzed. A total of 12 patients met the inclusion criteria. The mean bone height increase was 5.70 ± 3.75 mm, and the mean nasal passage volume decrease ratio was 17.73 ± 18.23 %. The findings demonstrated a significant correlation between NOSE scores and nasal passage volume alteration (Spearman's rank correlation, ρ = .889, 95% CI [.732, .960], P < 0.001); however, no significant correlation was found between NOSE scores and bone height alterations (Spearman's rank correlation, ρ = - .129, 95% CI [.-736, .457], P = .689). The results suggest that changes in nasal passage volume may influence patient-reported breathing function more than bone height increase. While a correlation was observed, causality cannot be inferred due to the study's retrospective nature and the limited sample size. Nevertheless, these findings provide preliminary evidence pointing to the potential importance of careful surgical planning to minimize volume reduction during nasal floor augmentation. Further prospective studies with larger and more diverse sample sizes must validate these results and strengthen the conclusions.</p>","PeriodicalId":519890,"journal":{"name":"The Journal of oral implantology","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144218025","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Reverse verification jig (RVJ): A proof of concept for assessing the accuracy of completearch definitive implant impressions.","authors":"Nirmal Kurian, Kevin George Varghese, Nishanth A Sudharson, Poonam Bali, Prathibha Mariam Thomas, Samiksha Wadhwa","doi":"10.1563/aaid-joi-D-25-00066","DOIUrl":"https://doi.org/10.1563/aaid-joi-D-25-00066","url":null,"abstract":"","PeriodicalId":519890,"journal":{"name":"The Journal of oral implantology","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144218026","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluation of Factors Contributing to Dental Implant Fracture: Impact of Neck Design in 1,026 Implants.","authors":"Hirotaka Muraoka, Takashi Kaneda, Kotaro Ito, Tomohiro Komatsu, Satoshi Tokunaga, Osamu Sakai","doi":"10.1563/aaid-joi-D-25-00011","DOIUrl":"https://doi.org/10.1563/aaid-joi-D-25-00011","url":null,"abstract":"<p><strong>Purpose: </strong>This study aimed to evaluate the factors contributing to dental implant fracture while focusing on different bone-level (BL) or soft-tissue-level (STL) neck designs.</p><p><strong>Materials and methods: </strong>This study analyzed 311 patients with 1,026 implants treated between April 2021 and March 2023. The proportions of dental implant sites were 13.6% (140/1026), 31.8% (326/1026), and 54.6% (560/1026) in the anterior teeth, premolars, and molars, respectively. The study investigated the presence or absence of implant fracture due to differences in BL or STL neck designs. The two groups were compared using Pearson's chi-square test. These tests used the morphology of the dental implant neck design as the criterion variable, while the presence or absence of implant fractures served as the explanatory variable. Statistical significance was set at P < .05.</p><p><strong>Results: </strong>The rate of implant fracture was 3/683 (0.4%) and 0/343 (0%) in the BL and STL groups, respectively (P = .56). By site, the rate was 0/140 (0.0%) in the anterior teeth, 0/326 (0.0%) in the premolars, and 3/560 (0.5%) in the molars (P = .55). No sex difference was observed in the presence of implant fractures (P = .18). However, a significant age difference was observed between the groups with and without fractures (P = .03).</p><p><strong>Conclusion: </strong>All implant fractures occurred in the BL group in this study. Our findings suggest that differences in dental implant neck design are an important factor associated with dental implant fracture.</p>","PeriodicalId":519890,"journal":{"name":"The Journal of oral implantology","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144182236","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}