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Costa MSC, Daltro Rosa CDDR, Bento VAA, da Silva Costa SM, Santiago JF, Pellizzer EP, Fraga de Almeida ALP. Efficacy of acellular xenogeneic dermal matrix graft in the treatment of multiple gingival recessions: systematic review and meta-analysis. Clin Oral Investig 2024; 28:177. [PMID: 38409621 DOI: 10.1007/s00784-024-05560-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Accepted: 02/14/2024] [Indexed: 02/28/2024]
Abstract
OBJECTIVE This study aimed to compare the efficacy of acellular xenogeneic dermal matrix graft (AXDM) compared to connective tissue graft (CTG) in treating multiple gingival recessions. MATERIALS AND METHODS A systematic search of electronic databases was conducted to identify randomized clinical trials (RCTs) that compared AXDM and CTG. The selected studies were subjected to bias risk assessment, data extraction, and meta-analyses. Parameters such as gingival recession height, width, mean percentage of root coverage, and complete root coverage were analyzed. RESULTS Seven RCTs involving 146 patients were included. The meta-analyses indicated that CTG was statistically superior to AXDM in reducing gingival recession height at the final follow-up (mean difference: -0.104 mm, 95% confidence interval [CI]: -0.180-0.028, p = 0.008) and width at the final follow-up (mean difference: -0.285 mm, 95% CI: -0.541-0.030, p = 0.029). CTG also demonstrated a significantly higher mean percentage of root coverage at the 6-month follow-up (difference in means: -2.761 mm, 95% CI: -4.932-0.590, p = 0.013) and a higher percentage of complete root coverage at the 6-month follow-up (odds Ratio [OR]: 0.598, 95% CI: 0.4-0.892, p = 0.012) compared to AXDM. However, there was no significant difference in the number of teeth with complete root coverage between CTG and AXDM (OR: 1.610, 95% CI: 0.983-2.636, p = 0.058) and aesthetic outcomes (mean difference: 0.148, 95% CI: -0.277-0.573, p = 0.494). CONCLUSIONS CTG is more effective than AXDM in treating multiple gingival recessions. This is evidenced by significant reductions in gingival recession height and width, a higher mean percentage of root coverage, and a greater percentage of complete root coverage at the 6-month follow-up. CLINICAL RELEVANCE In some clinical situations an alternative to CTG is required for the treatment of multiple gingival recessions. AXDM, despite presenting clinical outcomes that are not as satisfactory as CTG, can be used for this purpose.
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Affiliation(s)
- Matheus Souza Campos Costa
- Department of Prosthodontics and Periodontics, Bauru School of Dentistry, University of São Paulo (USP), 9-75, Vila Universitária, Bauru, SP, 17012-901, Brazil.
| | - Cléber Davi Del Rei Daltro Rosa
- Department of Dental Materials and Prosthodontics, Araçatuba Dental School, São Paulo State University (UNESP), Araçatuba, SP, Brazil
| | - Victor Augusto Alves Bento
- Department of Dental Materials and Prosthodontics, Araçatuba Dental School, São Paulo State University (UNESP), Araçatuba, SP, Brazil
| | - Sandy Maria da Silva Costa
- Department of Prosthodontics and Periodontics, Bauru School of Dentistry, University of São Paulo (USP), 9-75, Vila Universitária, Bauru, SP, 17012-901, Brazil
| | - Joel Ferreira Santiago
- Departament of Health Sciences, School of Dentistry, Centro Universitário Sagrado Coração- UNISAGRADO, Bauru, SP, Brazil
| | - Eduardo Piza Pellizzer
- Department of Dental Materials and Prosthodontics, Araçatuba Dental School, São Paulo State University (UNESP), Araçatuba, SP, Brazil
| | - Ana Lúcia Pompéia Fraga de Almeida
- Department of Prosthodontics and Periodontics, Bauru School of Dentistry, University of São Paulo (USP) and Hospital for Rehabilitation of Craniofacial Anomalies (HRAC), University of São Paulo, Bauru, SP, Brazil
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Chappuis-Chocano AP, Venante HS, da Costa RMB, Pordeus MD, Marcillo-Toala OO, Santiago JF, Porto VC. A systematic review and meta-analysis of the clinical performance of implant-supported overdentures retained by CAD-CAM bars. J Appl Oral Sci 2023; 31:e20230054. [PMID: 37646715 PMCID: PMC10501751 DOI: 10.1590/1678-7757-2023-0054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Revised: 06/07/2023] [Accepted: 07/10/2023] [Indexed: 09/01/2023] Open
Abstract
Currently, there is no consensus on the indications and clinical performance of implant-supported overdentures (IODs) involving computer-aided design and manufacturing (CAD-CAM) bars. OBJECTIVE To evaluate the performance of IODs involving CAD-CAM bars. METHODOLOGY A comprehensive search of studies published until May 2023 was conducted in many databases, including PubMed/MEDLINE, Web of Science, Cochrane Library, and SciELO, following the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA). The population, intervention, comparison, outcome (PICO) question was: "How do IODs retained by bars fabricated by CAD-CAM technology perform in daily clinical practice?" The meta-analysis included clinical studies based on effect size and a two-tailed null test with a 95% confidence interval (CI). RESULTS Ten studies were included in the meta-analysis. Among them, nine reported a 100% implant survival rate for all CAD-CAM milled bars. Complications were reported in two studies with CAD/CAM-milled titanium bars, and one study reported more fractures in soldered gold bars used in maxillary rehabilitation. However, no fractures were observed in IODs retained by PEEK and zirconia bars. According to six studies, biological complications, including peri-implantitis, were minimal in the BioHPP and PEEK bar groups, while no cases were reported in the titanium or zirconia bar groups. CAD-CAM-milled zirconia bars had higher plaque and bleeding indices compared with titanium bars, as evidenced by findings from five studies. All four studies that evaluated Oral Health Impact Profile (OHIP) scores showed a positive effect of IODs retained by CAD-CAM milled titanium bars on quality of life. Patient satisfaction and acceptance by prosthodontists were significantly high, according to the results of five studies. CONCLUSION Overdentures retained with CAD-CAM milled titanium bars show great potential for use in daily clinical practice. Moreover, patient and practitioner satisfaction was very high when this method was used.
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Affiliation(s)
- Ana Paula Chappuis-Chocano
- Universidade de São PauloFaculdade de Odontologia de BauruBauruSão PauloBrasilUniversidade de São Paulo, Faculdade de Odontologia de Bauru, Bauru, São Paulo, Brasil.
| | - Helena Sandrini Venante
- Universidade de São PauloFaculdade de Odontologia de BauruBauruSão PauloBrasilUniversidade de São Paulo, Faculdade de Odontologia de Bauru, Bauru, São Paulo, Brasil.
| | - Rodrigo Moreira Bringel da Costa
- Universidade de São PauloFaculdade de Odontologia de BauruBauruSão PauloBrasilUniversidade de São Paulo, Faculdade de Odontologia de Bauru, Bauru, São Paulo, Brasil.
| | - Mariana Domingues Pordeus
- Universidade de São PauloFaculdade de Odontologia de BauruBauruSão PauloBrasilUniversidade de São Paulo, Faculdade de Odontologia de Bauru, Bauru, São Paulo, Brasil.
| | - Oscar Oswaldo Marcillo-Toala
- Universidad de Especialidades Espíritu SantoSamborondónEcuadorUniversidad de Especialidades Espíritu Santo (UEES), Samborondón, Ecuador.
| | - Joel Ferreira Santiago
- Universidade de São PauloFaculdade de Odontologia de BauruBauruSão PauloBrasilUniversidade de São Paulo, Faculdade de Odontologia de Bauru, Bauru, São Paulo, Brasil.
| | - Vinícius Carvalho Porto
- Universidade de São PauloFaculdade de Odontologia de BauruBauruSão PauloBrasilUniversidade de São Paulo, Faculdade de Odontologia de Bauru, Bauru, São Paulo, Brasil.
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Santiago JF, Lemos CAA, de Luna Gomes JM, Verri FR, Moraes SLD, Pellizzer EP. Quality Assessment of Systematic Reviews on Platform-Switching vs Platform-Matched Implants: An Overview. J ORAL IMPLANTOL 2020; 46:153-162. [PMID: 31905050 DOI: 10.1563/aaid-joi-d-19-00114] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The objective of this study was to perform a quality analysis of systematic reviews with meta-analyses that focused on the comparison of platform-switching (implant-abutment mismatching) and platform-matched (PM) implants. The assessment of multiple systematic reviews (AMSTAR) and Glenny (Checklist) Scales were used to qualify the studies. PubMed, Scientific Electronic Library Online (SciELO), Web of Science (formerly ISI Web of Knowledge), and Cochrane databases were searched, by topic, for systematic reviews on dental implants with switching platforms. A total of 8 systematic reviews, including 7 studies with meta-analyses, were selected. The AMSTAR scale indicated a high (n = 6) to moderate (n = 2) score for the included studies. The quantitative analysis indicated that platform-switching implants preserved more bone tissue when compared with platform-matched implants (6 meta-analyses; P < .001, smaller mean difference: -0.29 mm, 95% CI: -0.38, -0.19 and greater mean difference: -0.49 mm, 95% CI: -0.73, -0.26). Quantitative analysis based on 7 systematic reviews with meta-analysis indicated positive peri-implant bone preservation for implants restored with an implant-abutment mismatching (PSW). Further, there is evidence to improve the design of current systematic reviews. Future systematic reviews in this thematic area should consider searches in gray literature and different databases and include only randomized controlled clinical studies.
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Affiliation(s)
| | | | | | - Fellippo Ramos Verri
- Dental School of Araçatuba, UNESP-Universidade Estadual Paulista, Araçatuba, São Paulo, Brazil
| | | | - Eduardo Piza Pellizzer
- Dental School of Araçatuba, UNESP-Universidade Estadual Paulista, Araçatuba, São Paulo, Brazil
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Nunes de Lima V, Faverani LP, Santiago JF, Palmieri C, Magro Filho O, Pellizzer EP. Evaluation of condylar resorption rates after orthognathic surgery in class II and III dentofacial deformities: A systematic review. J Craniomaxillofac Surg 2018. [DOI: 10.1016/j.jcms.2018.02.002] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Verri FR, Santiago JF, Almeida DA, de Souza Batista VE, Araujo Lemos CA, Mello CC, Pellizzer EP. Biomechanical Three-Dimensional Finite Element Analysis of Single Implant-Supported Prostheses in the Anterior Maxilla, with Different Surgical Techniques and Implant Types. Int J Oral Maxillofac Implants 2017; 32:e191-e198. [PMID: 28708909 DOI: 10.11607/jomi.5472] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
PURPOSE The aim of this study was to use three-dimensional finite element analysis to analyze the stress distribution transferred by single implant-supported prostheses placed in the anterior maxilla using different connections (external hexagon, internal hexagon, or Morse taper), inclinations of the load (0, 30, or 60 degrees), and surgical techniques for placement (monocortical/conventional, bicortical, or bicortical with nasal floor elevation). MATERIALS AND METHODS Nine models representing a bone block of this region were simulated by computer-aided design software (InVesalius, Rhinoceros, SolidWorks). Each model received one implant, which supported a cemented metalloceramic crown. Using FEMAP software, finite elements were discretized while simulating a 178-N load at 0, 30, and 60 degrees relative to the long axis of the implant. The problem was solved in NEi Nastran software, and postprocessing was performed in FEMAP. Von Mises stress and maximum principal stress maps were made. RESULTS The von Mises stress analysis revealed that stress increased with increasing inclination of the load, from 0 to 30 to 60 degrees. Morse taper implants showed less stress concentration around the cervical and apical areas of the implant. The bicortical technique, associated or not with nasal floor elevation, contributed to decreasing the stress concentration in the apical area of the implant. Maximum principal stress analysis showed that the increase in inclination was proportional to the increase in stress on the bone tissue in the cervical area. Lower stress concentrations in the cortical bone were obtained with Morse taper implants and the bicortical technique compared with other connections and surgical techniques, respectively. CONCLUSION Increasing the inclination of the applied force relative to the long axis of the implant tended to overload the peri-implant bone tissue and the internal structure of the implants. The Morse taper connection and bicortical techniques seemed to be more favorable than other connections or techniques, respectively, for restoring the anterior maxilla.
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Curra C, Cardoso CL, Ferreira O, Curi MM, Matsumoto MA, Cavenago BC, Santos PLD, Santiago JF. Medication-related osteonecrosis of the jaw. Introduction of a new modified experimental model. Acta Cir Bras 2017; 31:308-13. [PMID: 27275851 DOI: 10.1590/s0102-865020160050000003] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2016] [Accepted: 04/22/2016] [Indexed: 11/22/2022] Open
Abstract
PURPOSE To evaluate a modified experimental model for medication-related osteonecrosis of the jaw (MRONJ) through the upper right central incisor extraction followed by intravenous bisphosphonate administration. METHODS Forty five rats underwent the upper right central incisor tooth extraction were divided in 2 groups: Group I - experimental group, 30 rats received an intravenous administration protocol of zoledronic acid 35μg/kg into the tail vein every two weeks, totalizing four administrations, during eight weeks of administration, previously the extraction, and Group II - control group, 15 rats didn't received any medication before extraction. The groups were subdivided in postoperative periods: 14/28/42 days. Clinical analysis and microtomography were performed to verify the presence of osteonecrosis. In addition, descritive histological analysis of hematoxylin-eosin stained sections was performed to evaluate the presence of osteonecrosis or necrotic foci. RESULTS Twelve (40%) rats, from experimental group, showed clinical signs of MRONJ (p=0.005), however, all samples showed imaginologic findings like osteolysis and loss of integrity of the cellular walls (p≤0.001). Microscopic evaluation revealed osteonecrosis areas with microbial colonies and inflammatory infiltrate (p≤0.001). In the control group, all animals presented the chronology of a normal wound healing. CONCLUSIONS The presence of medication-related osteonecrosis of the jaw after maxillary central incisor extraction in rats. This new experimental model may be considered an option for the study of MRONJ.
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Affiliation(s)
- Cláudia Curra
- DDS, MSc student, Department of Oral Surgery, Universidade Sagrado Coração (USC), Bauru-SP, Brazil. Design of the study, technical procedures, MicroCt evaluation, manuscript writing., Department of Oral Surgery, Universidade Sagrado Coração, Bauru SP , Brazil
| | - Camila Lopes Cardoso
- DDS, MSc, PhD, Assistant Professor, Department of Oral Surgery, USC, and Postdoc-student, Department of Oral Surgery, Bauru Dental School, Universidade de São Paulo (USP), Bauru-SP, Brazil. Design of the study, technical procedures, interpretation of data, MicroCt evaluation, microscopic evaluation, manuscript writing. , Universidade de São Paulo, Department of Oral Surgery, Bauru Dental School, Universidade de São Paulo, Bauru SP , Brazil
| | - Osny Ferreira
- DDS, MSc, PhD, Assistant Professor, Department of Oral Surgery, Bauru Dental School, USP, Bauru-SP, Brazil. Design of the study, interpretation of data, manuscript writing. , Universidade de São Paulo, Department of Oral Surgery, Bauru Dental School, USP, Bauru SP , Brazil
| | - Marcos Martins Curi
- DDS, MSc, PhD, Assistant Professor, Department of Oral Surgery, USC, Bauru-SP, Brazil. Design of the study, interpretation of data, manuscript writing. , Department of Oral Surgery, USC, Bauru SP , Brazil
| | - Mariza Akemi Matsumoto
- DDS, MSc, PhD, Assistant Professor, Universidade Estadual Paulista (UNESP), Araçatuba-SP, Brazil. Design of the study, interpretation of data, microscopic evaluation, manuscript writing. , Universidade Estadual Paulista, Universidade Estadual Paulista, Araçatuba SP , Brazil
| | - Bruno Cavalini Cavenago
- DDS, MSc, PhD, Postdoc-student, Department of Endodontics, Bauru Dental School, USP, Bauru-SP, Brazil. Interpretation of data, MicroCt evaluation, manuscript writing. , Universidade de São Paulo, Department of Endodontics, Bauru Dental School, USP, Bauru SP , Brazil
| | - Pâmela Letícia Dos Santos
- DDS, MSc, PhD, Assistant Professor, Department of Oral Surgery, USC, Bauru-SP, Brazil. Design of the study, interpretation of data, manuscript writing. , Department of Oral Surgery, USC, Bauru SP , Brazil
| | - Joel Ferreira Santiago
- DDS, MSc, PhD, Assistant Professor, Department of Implantology, Bauru Dental School, USP, Bauru-SP, Brazil. Interpretation of data, statistical analysis, manuscript writing. , Universidade de São Paulo, Department of Implantology, Bauru Dental School, USP, Bauru SP , Brazil
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Minatel L, Verri FR, Kudo GAH, de Faria Almeida DA, de Souza Batista VE, Lemos CAA, Pellizzer EP, Santiago JF. Effect of different types of prosthetic platforms on stress-distribution in dental implant-supported prostheses. Materials Science and Engineering: C 2017; 71:35-42. [DOI: 10.1016/j.msec.2016.09.062] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2016] [Revised: 09/17/2016] [Accepted: 09/27/2016] [Indexed: 10/20/2022]
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Smith Nobrega A, Santiago JF, de Faria Almeida DA, dos Santos DM, Pellizzer EP, Goiato MC. Irradiated patients and survival rate of dental implants: A systematic review and meta-analysis. J Prosthet Dent 2016; 116:858-866. [DOI: 10.1016/j.prosdent.2016.04.025] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2015] [Revised: 04/26/2016] [Accepted: 04/28/2016] [Indexed: 10/21/2022]
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Leite ADL, Santiago JF, Levy FM, Maria AG, Fernandes MDS, Salvadori DMF, Ribeiro DA, Buzalaf MAR. Absence of DNA damage in multiple organs (blood, liver, kidney, thyroid gland and urinary bladder) after acute fluoride exposure in rats. Hum Exp Toxicol 2016; 26:435-40. [PMID: 17623768 DOI: 10.1177/0960327107076288] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Fluoride has been widely used in dentistry as a caries prophylactic agent. However, there has been some speculation that excess fluoride could cause an impact on genome integrity. In the current study, the potential DNA damage associated with exposure to fluoride was assessed in cells of blood, liver, kidney, thyroid gland and urinary bladder by the single cell gel (comet) assay. Male Wistar rats aging 75 days were distributed into seven groups: Groups 1 (control), 2, 3, 4, 5, 6 and 7 received 0 (deionized water), 10, 20, 40, 60, 80 and 100 mgF/Kg body weight from sodium fluoride (NaF), respectively, by gastrogavage. These groups were killed at 2 h after the administration of the fluoride doses. The level of DNA strand breaks did not increase in all organs evaluated and at all doses of NaF tested, as depicted by the mean tail moment. Taken together, our results suggest that oral exposure to NaF did not result in systemic genotoxic effect in multiple organs related to fluoride toxicity. Since DNA damage is an important step in events leading to carcinogenesis, this study represents a relevant contribution to the correct evaluation of the potential health risk associated with chemical exposure. Human & Experimental Toxicology ( 2007) 26, 435—440
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Affiliation(s)
- Aline de Lima Leite
- Department of Biological Sciences, Bauru Dental School, University of São Paulo, USP, 17012-901 Bauru, SP, Brazil
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Santiago JF, Verri FR, Almeida DADF, de Souza Batista VE, Lemos CAA, Pellizzer EP. Finite element analysis on influence of implant surface treatments, connection and bone types. Materials Science and Engineering: C 2016; 63:292-300. [DOI: 10.1016/j.msec.2016.02.061] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2015] [Revised: 02/02/2016] [Accepted: 02/19/2016] [Indexed: 11/27/2022]
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Verri FR, Batista VEDS, Santiago JF, Almeida DADF, Pellizzer EP. Effect of crown-to-implant ratio on peri-implant stress: a finite element analysis. Mater Sci Eng C Mater Biol Appl 2014; 45:234-40. [PMID: 25491825 DOI: 10.1016/j.msec.2014.09.005] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2014] [Revised: 08/04/2014] [Accepted: 09/09/2014] [Indexed: 01/13/2023]
Abstract
The aim of this study was to evaluate stress distribution in the fixation screws and bone tissue around implants in single-implant supported prostheses with crowns of different heights (10, 12.5, 15 mm - crown-to-implant ratio 1:1, 1.25:1, 1.5:1, respectively). It was designed using three 3-D models. Each model was developed with a mandibular segment of bone block including an internal hexagon implant supporting a screw-retained, single metal-ceramic crown. The crown height was set at 10, 12.5, and 15 mm with crown-to-implant ratio of 1:1, 1.25:1, 1.5:1, respectively. The applied forces were 200N (axial) and 100 N (oblique). The increase of crown height showed differences with the oblique load in some situations. By von Mises' criterion, a high stress area was concentrated at the implant/fixation screw and abutment/implant interfaces at crown-to-implant ratio of 1:1, 1.25:1, 1.5:1, respectively. Using the maximum principal criteria, the buccal regions showed higher traction stress intensity, whereas the distal regions showed the largest compressive stress in all models. The increase of C/I ratio must be carefully evaluated by the dentist since the increase of this C/I ratio is proportional to the increase of average stress for both screw fixation (C/I 1:1 to 1:1.25 ratio=30.1% and C/I 1:1 to 1:1.5 ratio=46.3%) and bone tissue (C/I 1:1 to 1:1.25 ratio=30% and C/I 1:1 to 1:1.5 ratio=51.5%).
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Affiliation(s)
- Fellippo Ramos Verri
- Department of Dental Materials and Prosthodontics, UNESP, Univ Estadual Paulista, 1193 José Bonifácio Street, Araçatuba, São Paulo 16015050, Brazil.
| | - Victor Eduardo de Souza Batista
- Department of Dental Materials and Prosthodontics, UNESP, Univ Estadual Paulista, 1193 José Bonifácio Street, Araçatuba, São Paulo 16015050, Brazil
| | - Joel Ferreira Santiago
- Department of Dental Materials and Prosthodontics, UNESP, Univ Estadual Paulista, 1193 José Bonifácio Street, Araçatuba, São Paulo 16015050, Brazil
| | - Daniel Augusto de Faria Almeida
- Department of Dental Materials and Prosthodontics, UNESP, Univ Estadual Paulista, 1193 José Bonifácio Street, Araçatuba, São Paulo 16015050, Brazil
| | - Eduardo Piza Pellizzer
- Department of Dental Materials and Prosthodontics, UNESP, Univ Estadual Paulista, 1193 José Bonifácio Street, Araçatuba, São Paulo 16015050, Brazil
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Mazaro JVQ, de Mello CC, Zavanelli AC, Santiago JF, Amoroso AP, Pellizzer EP. An esthetics rehabilitation with computer-aided design/ computer-aided manufacturing technology. J Contemp Dent Pract 2014; 15:506-512. [PMID: 25576121 DOI: 10.5005/jp-journals-10024-1570] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
AIM This paper describes a case of a rehabilitation involving Computer Aided Design/Computer Aided Manufacturing (CAD-CAM) system in implant supported and dental supported prostheses using zirconia as framework. BACKGROUND The CAD-CAM technology has developed considerably over last few years, becoming a reality in dental practice. Among the widely used systems are the systems based on zirconia which demonstrate important physical and mechanical properties of high strength, adequate fracture toughness, biocompatibility and esthetics, and are indicated for unitary prosthetic restorations and posterior and anterior framework. CASE DESCRIPTION All the modeling was performed by using CAD-CAM system and prostheses were cemented using resin cement best suited for each situation. CONCLUSION The rehabilitation of the maxillary arch using zirconia framework demonstrated satisfactory esthetic and functional results after a 12-month control and revealed no biological and technical complications. CLINICAL SIGNIFICANCE This article shows the important of use technology CAD/CAM in the manufacture of dental prosthesis and implant-supported.
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Affiliation(s)
- Josá Vitor Quinelli Mazaro
- Assistant Professor, Department of Dental Materials and Prosthodontics UNESP - Universidade Estadual Paulista, Sao Paulo, Brazil, e-mail:
| | - Caroline Cantieri de Mello
- PhD Student, Department of Dental Materials and Prosthodontics UNESP - Universidade Estadual Paulista, Sao Paulo, Brazil
| | - Adriana Cristina Zavanelli
- Assistant Professor, Department of Dental Materials and Prosthodontics UNESP - Universidade Estadual Paulista, Sao Paulo, Brazil
| | - Joel Ferreira Santiago
- Professor, Department of Health Sciences, University of Sacred Heart-USC, São Paulo, Brazil
| | - Andressa Paschoal Amoroso
- Adjunct Professor, Department of Dental Materials and Prosthodontics UNESP - Universidade Estadual Paulista, Sao Paulo, Brazil
| | - Eduardo Piza Pellizzer
- MSc Student, Department of Dental Materials and Prosthodontics UNESP - Universidade Estadual Paulista, Sao Paulo, Brazil
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de Faria Almeida DA, Pellizzer EP, Verri FR, Santiago JF, de Carvalho PSP. Influence of Tapered and External Hexagon Connections on Bone Stresses Around Tilted Dental Implants: Three-Dimensional Finite Element Method With Statistical Analysis. J Periodontol 2014; 85:261-9. [DOI: 10.1902/jop.2013.120713] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Moraes SLD, Pellizzer EP, Verri FR, Santiago JF, Silva JVL. Three-dimensional finite element analysis of stress distribution in retention screws of different crown-implant ratios. Comput Methods Biomech Biomed Engin 2013; 18:689-96. [PMID: 23947571 DOI: 10.1080/10255842.2013.820719] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
The retaining screw of the implant-supported dental prosthesis is the weakest point of the crown/implant system. Furthermore, crown height is another important factor that may increase the lever arm. Therefore, the aim of this study was to assess the stress distribution in implant prosthetic screws with different heights of the clinical crown of the prosthesis using the method of three-dimensional finite element analysis. Three models were created with implants (3.75 mm × 10 mm) and crowns (heights of 10, 12.5 and 15 mm). The results were visualised by means of von Mises stress maps that increased the crown heights. The screw structure exhibited higher levels of stresses in the oblique load. The oblique loading resulted in higher stress concentration when compared with the axial loading. It is concluded that the increase of the crown was damaging to the stress distribution on the screw, mainly in oblique loading.
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Affiliation(s)
- S L D Moraes
- a Department of Prosthodontics , Pernambuco State University , Recife , Brazil
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15
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Goiato MC, dos Santos DM, de Carvalho Dekon SF, Pellizzer EP, Santiago JF, Moreno A. Craniofacial Implants Success in Facial Rehabilitation. J Craniofac Surg 2011; 22:241-2. [DOI: 10.1097/scs.0b013e3181f7b702] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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16
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Pellizzer EP, Falcón-Antenucci RM, de Carvalho PSP, Santiago JF, de Moraes SLD, de Carvalho BM. Photoelastic Analysis of the Influence of Platform Switching on Stress Distribution in Implants. J ORAL IMPLANTOL 2010; 36:419-24. [DOI: 10.1563/aaid-joi-d-09-00077] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Abstract
The aim of this study was to evaluate the stress distribution of platform switching implants using a photoelastic method. Three models were constructed of the photoelastic resin PL-2, with a single implant and a screw-retained implant-supported prosthesis. These models were Model A, platform 5.0 mm/abutment 4.1 mm; Model B, platform 4.1 mm/abutment 4.1 mm; and Model C, platform 5.00 mm/abutment 5.00 mm. Axial and oblique (45°) loads of 100 N were applied using a Universal Testing Machine (EMIC DL 3000). Images were photographed with a digital camera and visualized with software (AdobePhotoshop) to facilitate the qualitative analysis. The highest stress concentrations were observed at the apical third of the 3 models. With the oblique load, the highest stress concentrations were located at the implant apex, opposite the load application. Stress concentrations decreased in the cervical region of Model A (platform switching), and Models A (platform switching) and C (conventional/wide-diameter) displayed similar stress magnitudes. Finally, Model B (conventional/regular diameter) displayed the highest stress concentrations of the models tested.
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Affiliation(s)
- Eduardo Piza Pellizzer
- Department of Dental Materials and Prosthodontics, Araçatuba School of Dentistry, São Paulo State University, Brazil
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17
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Abstract
The Almendares River is the most important surface water body of the Cuban capital, Havana. In the present work, the environmental quality of waters was studied as a function of the following 14 variables: content of calcium, cadmium, iron, potassium, magnesium, manganese, sodium, nickel, zinc, chlorine, bicarbonate, and sulfate; pH; and electric conductivity parameters, which were reduced to three new variables by means of principal component analysis (PCA). The content of metal increased in waters sampled at stations located near garbage dumps and decreased inside the Ejercito Rebelde dam. The variation of the river water environmental quality with rainy and dry seasons and the differentiation of samples in three groups along the river course were obtained by PCA and corroborated by discriminant analysis. Applied statistical techniques showed their ability for environmental interpretation of limited experimental data.
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Affiliation(s)
- I Mora-Leyva
- National Centre of Hydraulic Researches and Quality of Waters, Hydraulic Resources Institute, Ciudad de La Habana, Cuba
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18
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el-Zeftawy H, Heiba SI, Jana S, Rosen G, Salem S, Santiago JF, Abdel-Dayem HM. Role of repeated F-18 fluorodeoxyglucose imaging in management of patients with bone and soft tissue sarcoma. Cancer Biother Radiopharm 2001; 16:37-46. [PMID: 11279796 DOI: 10.1089/108497801750096005] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
AIM OF THE STUDY To assess the impact of repeated F-18 FDG studies on the management of patients with bone and soft tissue (B&S) sarcomas. MATERIAL AND METHODS Twenty patients with B&S tissue tumors (11 M and 9 F age 17-72 years) had 52 F-18 FDG Dual Head Coincidence Imaging (DHCI) studies. 7 patients were followed for 6 months to 2 years clinically after removal of the primary tumor. Thirteen patients were evaluated for suspected recurrences. Patient's preparation, F-18 FDG injection and imaging procedure were done according to department protocol. Attenuation corrected images were interpreted visually by 3 trained physicians. Tumor to background ratios were calculated for all lesions. RESULTS In 13 patients having both studies, baseline FDG and CT/MRI were concordant in 8 patients, FDG detected more lesions in 3 patients but it did not detect 4 metastatic pulmonary nodules in 2 patients. Follow up studies showed stable disease in 10 patients while 6 patients who showed worsening disease needed to change their chemotherapy. Surgery was avoided in 2 patients and 2 patients showed improved response. CONCLUSION Repeated F-18 FDG DHCI examinations proved to have an impact on the clinical management of patients with malignant bone and soft tissue sarcoma. It helps to differentiate postoperative changes from local recurrence.
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Affiliation(s)
- H el-Zeftawy
- Saint Vincent's Catholic Medical Centers of New York, Section of Nuclear Medicine, Department of Radiology, New York Medical College, Valhalla, NY, USA
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19
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Buyukdereli G, Heiba S, Salem S, Santiago JF, Goswami G, Jana S, Abdel-Dayem HM. Tc-99m MAG3 scintigraphy in unusually dilated bilateral extrarenal pelves. Clin Nucl Med 2000; 25:471-2. [PMID: 10836699 DOI: 10.1097/00003072-200006000-00017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
The authors report the findings of a radionuclide diuretic renogram in a patient with markedly dilated pelves bilaterally that filled most of the abdominal cavity. With the patient in the sitting position, at the end of the furosemide injection, there was good delineation and filling of the dilated calyces. These findings are unusual because of the extensive pelvicaliceal dilatation, and they emphasize the importance of the sitting position.
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Affiliation(s)
- G Buyukdereli
- Department of Radiology, Saint Vincents Hospital, New York Medical College, Valhalla 10011, USA
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20
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Goswami GK, Jana S, Santiago JF, Buyukdereli G, Salem SS, Heiba S, Abdel-Dayem HM. Discrepancy between Ga-67 citrate and F-18 fluorodeoxyglucose positron emission tomographic scans in pulmonary infection. Clin Nucl Med 2000; 25:490-1. [PMID: 10836710 DOI: 10.1097/00003072-200006000-00028] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
The authors describe a patient with the acquired immunodeficiency syndrome who had active pulmonary tuberculosis and was receiving anti-tuberculosis treatment. High-grade fever and a right-sided pleural effusion had recently developed. Results of a Ga-67 scan were negative for any focal infection in the chest. Fluorine-18 fluorodeoxyglucose positron emission tomography showed increased uptake in the right lower lung field, which correlated with the diagnosis of concomitant bacterial pneumonia. Anti-tuberculosis treatment can decrease the sensitivity of the Ga-67 scan and could have contributed to this discrepancy. The authors predict that the fluorine-18 fluorodeoxyglucose positron emission tomographic scan will play an important diagnostic role in the management of such a selected group of patients.
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Affiliation(s)
- G K Goswami
- Department of Radiology, Saint Vincents Hospital, New York Medical College, Valhalla 10011, USA
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21
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Affiliation(s)
- J F Santiago
- Department of Radiology, Saint Vincents Hospital and Medical Center, New York, New York 10011, USA
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