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Zou Y, Mei X, Wang X, Zhang X, Wang X, Xiang W, Lu N. Fibrin-konjac glucomannan-black phosphorus hydrogel scaffolds loaded with nasal ectodermal mesenchymal stem cells accelerated alveolar bone regeneration. BMC Oral Health 2024; 24:878. [PMID: 39095803 PMCID: PMC11297757 DOI: 10.1186/s12903-024-04649-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2024] [Accepted: 07/23/2024] [Indexed: 08/04/2024] Open
Abstract
BACKGROUND Effective treatments for the alveolar bone defect remain a major concern in dental therapy. The objectives of this study were to develop a fibrin and konjac glucomannan (KGM) composite hydrogel as scaffolds for the osteogenesis of nasal mucosa-derived ectodermal mesenchymal stem cells (EMSCs) for the regeneration of alveolar bone defect, and to investigate the osteogenesis-accelerating effects of black phosphorus nanoparticles (BPNs) embedded in the hydrogels. METHODS Primary EMSCs were isolated from rat nasal mucosa and used for the alveolar bone recovery. Fibrin and KGM were prepared in different ratios for osteomimetic hydrogel scaffolds, and the optimal ratio was determined by mechanical properties and biocompatibility analysis. Then, the optimal hydrogels were integrated with BPNs to obtain BPNs/fibrin-KGM hydrogels, and the effects on osteogenic EMSCs in vitro were evaluated. To explore the osteogenesis-enhancing effects of hydrogels in vivo, the BPNs/fibrin-KGM scaffolds combined with EMSCs were implanted to a rat model of alveolar bone defect. Micro-computed tomography (CT), histological examination, real-time quantitative polymerase chain reaction (RT-qPCR) and western blot were conducted to evaluate the bone morphology and expression of osteogenesis-related genes of the bone regeneration. RESULTS The addition of KGM improved the mechanical properties and biodegradation characteristics of the fibrin hydrogels. In vitro, the BPNs-containing compound hydrogel was proved to be biocompatible and capable of enhancing the osteogenesis of EMSCs by upregulating the mineralization and the activity of alkaline phosphatase. In vivo, the micro-CT analysis and histological evaluation demonstrated that rats implanted EMSCs-BPNs/fibrin-KGM hydrogels exhibited the best bone reconstruction. And compared to the model group, the expression of osteogenesis genes including osteopontin (Opn, p < 0.0001), osteocalcin (Ocn, p < 0.0001), type collagen (Col , p < 0.0001), bone morphogenetic protein-2 (Bmp2, p < 0.0001), Smad1 (p = 0.0006), and runt-related transcription factor 2 (Runx2, p < 0.0001) were all significantly upregulated. CONCLUSIONS EMSCs/BPNs-containing fibrin-KGM hydrogels accelerated the recovery of the alveolar bone defect in rats by effectively up-regulating the expression of osteogenesis-related genes, promoting the formation and mineralisation of bone matrix.
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Affiliation(s)
- Yin Zou
- Department of Stomatology, Affiliated Children's Hospital of Jiangnan University, Jiangnan University, Wuxi, Jiangsu Province, People's Republic of China
| | - Xue Mei
- School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu Province, People's Republic of China
| | - Xinhe Wang
- School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu Province, People's Republic of China
| | - Xuan Zhang
- School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu Province, People's Republic of China
| | - Xun Wang
- Jiangnan University Medical Center, Wuxi, Jiangsu Province, People's Republic of China
| | - Wen Xiang
- Department of Hepatobiliary Surgery, Affiliated Hospital of Jiangnan University, Wuxi, Jiangsu Province, People's Republic of China
| | - Naiyan Lu
- School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu Province, People's Republic of China.
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Tahchy D, Husseini B, Ghosn N, Younes R, Khoury N, Bouserhal J, Riachi F. Three-dimensional radiographic assessment of the mandibular retromolar donor site in different vertical facial growth types. JOURNAL OF STOMATOLOGY, ORAL AND MAXILLOFACIAL SURGERY 2023; 124:101457. [PMID: 36972788 DOI: 10.1016/j.jormas.2023.101457] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Revised: 03/23/2023] [Accepted: 03/24/2023] [Indexed: 03/29/2023]
Abstract
PURPOSE To assess volumetrically, the impact of vertical facial growth types (VGFT) on the retromolar area as a bone donor site MATERIAL AND METHODS: 60 cone beam computed tomography (CBCT) scans of adult individuals were classified in three groups according to their SN-GoGn angle: hypodivergent group (hG) (33.33%), normodivergent group (NG) (30%) and hyperdivergent group (HG) (36.67%). Total harvestable bone volume and surface (TBV and TBS respectively), total cortical and cancellous bone volume (TCBV and TcBV respectively) and the percentage of cortical and cancellous bone volume (CBV and cBV respectively) were evaluated. RESULTS The whole sample showed a mean TBV of 1220.99±448.81mm³ and a mean TBS of 940.29±259.93mm². Statistically significant differences were found between the different outcome variables and the vertical growth patterns (p<0.001). TBS differs for the different vertical growth patterns with the highest mean of TBS observed in the hG group. TBV also significantly differs between the different vertical growth patterns (p<0.001) with the highest mean observed for the hG individuals. Significant differences in percentages of cBV and CBV were present between the hyper-divergent groups and the other groups (p<0.001) with the hyper-divergent group having the lowest percentage of CBV and the highest percentage of cBV. CONCLUSION hypodivergent individuals tend to have thicker bone blocks that can be used in onlay technique while thinner bone blocks harvested from hyperdivergent and normodivergent individuals can be used in three-dimensional grafting approach.
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Affiliation(s)
- Daniel Tahchy
- Department of Oral Surgery, Faculty of Dental Medicine, Saint-Joseph University of Beirut, Beirut, Lebanon; Cranio-Facial Research Laboratory, Faculty of Dental Medicine, Saint-Joseph, United States.
| | - Bachar Husseini
- Cranio-Facial Research Laboratory, Faculty of Dental Medicine, Saint-Joseph, United States
| | - Nabil Ghosn
- Cranio-Facial Research Laboratory, Faculty of Dental Medicine, Saint-Joseph, United States
| | - Ronald Younes
- Department of Oral Surgery, Faculty of Dental Medicine, Saint-Joseph University of Beirut, Beirut, Lebanon; Cranio-Facial Research Laboratory, Faculty of Dental Medicine, Saint-Joseph, United States
| | - Nicolas Khoury
- Department of Oral Surgery, Faculty of Dental Medicine, Saint-Joseph University of Beirut, Beirut, Lebanon; Cranio-Facial Research Laboratory, Faculty of Dental Medicine, Saint-Joseph, United States
| | - Joseph Bouserhal
- Cranio-Facial Research Laboratory, Faculty of Dental Medicine, Saint-Joseph, United States; Department of Orthodontics, Faculty of Dental Medicine, Saint-Joseph University of Beirut, Beirut, Lebanon; Department of orthodontics, Henry M. Goldman School of Dental Medicine, Boston, United States
| | - Faouzi Riachi
- Department of Oral Surgery, Faculty of Dental Medicine, Saint-Joseph University of Beirut, Beirut, Lebanon
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Sun Y, Hu S, Xie Z, Zhou Y. Relevant factors of posterior mandible lingual plate perforation during immediate implant placement: a virtual implant placement study using CBCT. BMC Oral Health 2023; 23:76. [PMID: 36747164 PMCID: PMC9903431 DOI: 10.1186/s12903-022-02696-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Accepted: 12/26/2022] [Indexed: 02/08/2023] Open
Abstract
BACKGROUND To explore the influence of cross-sectional type and morphological parameters at the mandibular molar sites on lingual plate perforation (LPP) during the immediate implant placement (IIP). METHODS 181 implants were virtually placed in the mandibular molar sites on the cone beam computed tomography (CBCT). Each cross-section of the implantation site was divided into the Undercut (U)/Parallel (P)/Convex (C) types. Morphologically relevant parameters were measured on the cross-sections, including width of the upper end (Wb), width of the lower end (Wc), vertical height (V), angle between the natural crown axis and the alveolar bone axis (∠β), LC depth (LCD), LC height, and angle between the horizontal line and the line connecting the most prominent point and the most concave point of lingual plate (∠α). Besides, the distance from the end of the virtual implant and the lingual bone plate of the cross-section (DIL) was calculated. Relationships between all the morphologically relevant parameters and the DIL were further analyzed. RESULTS A total of 77 (42.5%) cross-sections were classified as U-type, which was the most common one, accounting for 63% of the second molar regions. All LPP cases and most of the nearly LPP (87.9%) cases occurred at the U-type cross-sections, and the relationship between the DIL and the morphological parameters can be expressed by a multivariate linear equation. CONCLUSIONS The occurrence rate of U-type cross-sections in the second molar region was very high, and the risk of LPP should be considered during IIP. Except for the U-type, significant large LCD, small Wc, and large ∠β were the important relevant factors. CBCT and multivariate linear equations could help to assess the LPP risk and provide a reference for implant placement design pre-surgery.
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Affiliation(s)
- Yingjia Sun
- grid.13402.340000 0004 1759 700XStomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou, 310000 People’s Republic of China
| | - Sai Hu
- grid.13402.340000 0004 1759 700XThe Fourth Affiliated Hospital, Zhejiang University School of Medicine, N1 Shangcheng Road, Yiwu, 322000 Zhejiang People’s Republic of China
| | - Zhijian Xie
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou, 310000, People's Republic of China.
| | - Yiqun Zhou
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou, 310000, People's Republic of China.
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Clinical Applications of Poly-Methyl-Methacrylate in Neurosurgery: The In Vivo Cranial Bone Reconstruction. J Funct Biomater 2022; 13:jfb13030156. [PMID: 36135591 PMCID: PMC9504957 DOI: 10.3390/jfb13030156] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Revised: 09/12/2022] [Accepted: 09/13/2022] [Indexed: 11/23/2022] Open
Abstract
Background: Biomaterials and biotechnology are becoming increasingly important fields in modern medicine. For cranial bone defects of various aetiologies, artificial materials, such as poly-methyl-methacrylate, are often used. We report our clinical experience with poly-methyl-methacrylate for a novel in vivo bone defect closure and artificial bone flap development in various neurosurgical operations. Methods: The experimental study included 12 patients at a single centre in 2018. They presented with cranial bone defects after various neurosurgical procedures, including tumour, traumatic brain injury and vascular pathologies. The patients underwent an in vivo bone reconstruction from poly-methyl-methacrylate, which was performed immediately after the tumour removal in the tumour group, whereas the trauma and vascular patients required a second surgery for cranial bone reconstruction due to the bone decompression. The artificial bone flap was modelled in vivo just before the skin closure. Clinical and surgical data were reviewed. Results: All patients had significant bony destruction or unusable bone flap. The tumour group included five patients with meningiomas destruction and the trauma group comprised four patients, all with severe traumatic brain injury. In the vascular group, there were three patients. The average modelling time for the artificial flap modelling was approximately 10 min. The convenient location of the bone defect enabled a relatively straightforward and fast reconstruction procedure. No deformations of flaps or other complications were encountered, except in one patient, who suffered a postoperative infection. Conclusions: Poly-methyl-methacrylate can be used as a suitable material to deliver good cranioplasty cosmesis. It offers an optimal dural covering and brain protection and allows fast intraoperative reconstruction with excellent cosmetic effect during the one-stage procedure. The observations of our study support the use of poly-methyl-methacrylate for the ad hoc reconstruction of cranial bone defects.
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Li J, Fan Z, Huang M, Xie Y, Guan Z, Ruan J. Enhanced healing process of tooth sockets using strontium-doped TiO 2. RSC Adv 2022; 12:17817-17820. [PMID: 35765343 PMCID: PMC9199484 DOI: 10.1039/d2ra00341d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Accepted: 05/20/2022] [Indexed: 11/21/2022] Open
Abstract
Prevention of residual ridge resorption is important for tooth socket healing in clinical treatment. As a well known biomaterial, titanium dioxide (TiO2) has been reported to show desirable bone regeneration capability. On the other hand, strontium plays a role in maintaining normal function in organisms and balancing bone remodeling. Hence, we synthesized strontium-doped titanium dioxide mesoporous nanospheres functionalized with amino-group using diphenyl diisocyanate. After incorporation with segmented polyurethane, the obtained injectable SPU/Sr-TiO2/MDI nanocomposite adhesive showed satisfactory antibacterial activity and cell nontoxicity. This nanocomposite was used for tooth socket healing, and greatly promoted the formation of new bone tissue in the tooth extraction socket.
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Affiliation(s)
- Jialing Li
- College of Stomatology, Department of Preventive Dentistry, Xi'an Jiao Tong University Xi'an Shaanxi People's Republic of China .,Nanchong Central Hospital, The Second Clinical College of North Sichuan Medical College Nanchong Sichuan People's Republic of China
| | - Zilu Fan
- Nanchong Central Hospital, The Second Clinical College of North Sichuan Medical College Nanchong Sichuan People's Republic of China
| | - Min Huang
- Nanchong Central Hospital, The Second Clinical College of North Sichuan Medical College Nanchong Sichuan People's Republic of China
| | - Yonglin Xie
- Nanchong Central Hospital, The Second Clinical College of North Sichuan Medical College Nanchong Sichuan People's Republic of China
| | - Zhenju Guan
- Nanchong Central Hospital, The Second Clinical College of North Sichuan Medical College Nanchong Sichuan People's Republic of China
| | - Jianping Ruan
- College of Stomatology, Department of Preventive Dentistry, Xi'an Jiao Tong University Xi'an Shaanxi People's Republic of China
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R A, Koduganti RR, Harika TSL, Rajaram H. Ridge Augmentation Is a Prerequisite for Successful Implant Placement: A Literature Review. Cureus 2022; 14:e20872. [PMID: 35145779 PMCID: PMC8805661 DOI: 10.7759/cureus.20872] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/02/2022] [Indexed: 12/03/2022] Open
Abstract
Alveolar ridge defects are commonly seen in partially dentate patients, and they jeopardize speech, appearance, and oral hygiene maintenance. These defects affect both soft tissues and bone and are mainly caused by trauma. These defects are more prevalent in middle-aged male patients and it is imperative that the defective ridge is augmented before receiving an implant or a fixed partial denture. This review focuses on the different types of ridge defects and their treatment options.
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Andre A, Ogle OE. Vertical and Horizontal Augmentation of Deficient Maxilla and Mandible for Implant Placement. Dent Clin North Am 2020; 65:103-123. [PMID: 33213705 DOI: 10.1016/j.cden.2020.09.009] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Ridge augmentation for implant procedures has been shown to be highly successful. There are several techniques available to the dentist, but they require some degree of surgical expertise and experience. No particular technique has been shown to be superior. This article presents the indications, techniques, and complications of the various procedures for alveolar ridge augmentation. This information will educate the general dental practitioner of the techniques available and provide information on the surgical procedures that could be used to discuss with patients when they are being referred to a specialist.
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Affiliation(s)
- Amanda Andre
- The Brooklyn Hospital Center, 121 Dekalb Avenue, Brooklyn, NY 11201, USA.
| | - Orrett E Ogle
- Mona Dental Program, Faculty of Medicine, Univ. of the West Indies, Kingston 6, Jamaica; Oral and Maxillofacial Surgery, Woodhull Hospital, Brooklyn, NY 11206, USA
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Guimarães GMMDF, Bernini GF, Grandizoli DK, Carvalho PSPD, Gonçales ES, Ferreira Junior O. Evaluation of bone availability for grafts in different donor sites, through computed tomography. J Appl Oral Sci 2020; 28:e20190435. [PMID: 32049138 PMCID: PMC6999119 DOI: 10.1590/1678-7757-2019-0435] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2019] [Accepted: 10/22/2019] [Indexed: 12/03/2022] Open
Abstract
Objective To quantify the bone volume that can be safely withdrawn from 3 donor sites: (1) the mandibular symphysis, (2) the oblique mandibular line and (3) the skullcap. Methodology For the symphysis, 200 tomographic exams were evaluated by the extension of the anterior loop of mental foramen, by the nerve, by the distance of the foramens, by the distance between the vestibular cortical and the lingual plates and by the distance between the apexes, or lower anterior teeth, and the mandibular base, using the “distance” tool of the I-CAT Vision, in the panoramic and parasagittal reformations. For the oblique line, 70 TCFC exams were analyzed retrospectively in panoramic and parasagittal reformations, evaluating the thickness of the vestibular cortical and the distance between the cortical and the mandibular canal. For the cranial bone, a hexagonal donor site located in parietal area was considered. Results The average dimensions of the bone blocks that can be safely removed from the region of the mandibular symphysis are: 32.27 mm in length, 4.87 mm in height and 4 mm in thickness, providing a volume of 628.61 mm3 available for grafting. In the oblique line, the available bone volume for grafting was 859.61 mm3. In the region of the cranial vault, multiplying the average bone thickness by the area of the hexagon, an average volume of 2,499 mm3 was obtained. Conclusions Comparing the donor sites, the bone availability in the cranial vault is 3 times greater than in the mandibular posterior region, and at least 2 times greater than in the mandibular symphysis.
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Affiliation(s)
| | - Gabriel Fiorelli Bernini
- Universidade de São Paulo, Faculdade de Odontologia de Bauru, Departamento de Cirurgia, Estomatologia, Patologia e Radiologia, Bauru, São Paulo, Brasil
| | - Dayane Kemp Grandizoli
- Universidade de São Paulo, Faculdade de Odontologia de Bauru, Departamento de Cirurgia, Estomatologia, Patologia e Radiologia, Bauru, São Paulo, Brasil
| | - Paulo Sergio Perri de Carvalho
- Universidade de São Paulo, Faculdade de Odontologia de Bauru, Departamento de Cirurgia, Estomatologia, Patologia e Radiologia, Bauru, São Paulo, Brasil
| | - Eduardo Sanches Gonçales
- Universidade de São Paulo, Faculdade de Odontologia de Bauru, Departamento de Cirurgia, Estomatologia, Patologia e Radiologia, Bauru, São Paulo, Brasil
| | - Osny Ferreira Junior
- Universidade de São Paulo, Faculdade de Odontologia de Bauru, Departamento de Cirurgia, Estomatologia, Patologia e Radiologia, Bauru, São Paulo, Brasil
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The Influence of Thrust Force on the Vitality of Bone Chips Harvested for Autologous Augmentation during Dental Implantation. MATERIALS 2019; 12:ma12223695. [PMID: 31717506 PMCID: PMC6888375 DOI: 10.3390/ma12223695] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Revised: 11/04/2019] [Accepted: 11/07/2019] [Indexed: 02/03/2023]
Abstract
Bone drill chips that are collected during implant site preparation can be reused as autologous bone-grafting material for alveolar ridge augmentation. This study characterized five market-leading implant drill sets regarding their geometric properties and ability to produce vital bone chips. The drill geometry of each tool of five commercial implant drill sets was characterized while using optical profile projector devices and SEM. Bone chips were collected during the in vitro preparation of porcine jaw bone with the various drill sets. Produced bone chip masses were measured. The bone chips were cultured in vitro and the number of outgrown cells was determined and measurand for vitality. Furthermore, the thrust force and cutting torque were recorded to examine the mechanical loads of the manual drilling process. The tool geometry and set configuration of one out of five implant drill sets appears to be superior regarding chip mass, vitality, and thrust force. It could be proven that there is a correlation between vitality and thrust force. The thrust force is influenced by the cutting behavior of the tool, which in turn depends on the geometry of the tool. The tool geometry has an influence on the vitality of the augmentation material due to this relationship.
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Li X, Liu X, Ni S, Liu Y, Sun H, Lin Q. Enhanced osteogenic healing process of rat tooth sockets using a novel simvastatin-loaded injectable microsphere-hydrogel system. J Craniomaxillofac Surg 2019; 47:1147-1154. [DOI: 10.1016/j.jcms.2019.04.011] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2018] [Revised: 03/01/2019] [Accepted: 04/18/2019] [Indexed: 12/21/2022] Open
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Herford AS, Lowe I, Jung P. Titanium Mesh Grafting Combined with Recombinant Human Bone Morphogenetic Protein 2 for Alveolar Reconstruction. Oral Maxillofac Surg Clin North Am 2019; 31:309-315. [PMID: 30852177 DOI: 10.1016/j.coms.2018.12.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
There are several methods of regenerating the maxillary and mandibular ridge to achieve orthoalveolar form with bone grafting procedures, including block onlay grafting and guided bone regeneration. Traditionally, guided bone regeneration has focused on creating a space for bone regeneration to occur. The use of a formed titanium mesh to regenerate alveolar defects was popularized in the 1980s. With the advent of other adjuncts, such as resorbable membranes, and growth factors, such as recombinant human bone morphogenetic protein 2, the predictability of the procedure has increased and a wide variety of defects can be restored using this technology.
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Affiliation(s)
- Alan S Herford
- Department of Oral and Maxillofacial Surgery, Loma Linda University School of Dentistry, 11092 Anderson Street, Loma Linda, CA 92350, USA.
| | - Isaac Lowe
- Department of Oral and Maxillofacial Surgery, Loma Linda University School of Dentistry, 11092 Anderson Street, Loma Linda, CA 92350, USA
| | - Paul Jung
- Department of Oral and Maxillofacial Surgery, Loma Linda University School of Dentistry, 11092 Anderson Street, Loma Linda, CA 92350, USA
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Mechanical Characterization of 3D-Printed Individualized Ti-Mesh (Membrane) for Alveolar Bone Defects. JOURNAL OF HEALTHCARE ENGINEERING 2019; 2019:4231872. [PMID: 30838123 PMCID: PMC6374856 DOI: 10.1155/2019/4231872] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/26/2018] [Accepted: 12/13/2018] [Indexed: 11/17/2022]
Abstract
Individualized titanium mesh holds many advantages over conventional mesh. There are few reports in the literature about the effect of mesh pore size and mesh thickness on the mechanical properties of titanium mesh. This study is designed to develop an individualized titanium mesh using computer-assisted design and additive manufacturing technology. This study will also explore the effect of different thicknesses and pore sizes of titanium mesh on its mechanical properties through 3D FEA. According to this study, the mechanical properties of titanium mesh increased when the thickness decreased (0.5 mm to 0.3 mm). With an increase in mesh diameter (3 mm to 5 mm), the mechanical properties of mesh decreased. The diameter of titanium mesh has less influence on its mechanical properties than does the thickness of the mesh. Titanium mesh with a thickness of 0.4 mm is strong enough and causes less stimulation to mucosa; therefore, it is more suitable for clinical use. In addition, parameters of titanium mesh should be decided clinically according to bone defect size, defect location, and force situation.
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Park SA, Lee HJ, Kim KS, Lee SJ, Lee JT, Kim SY, Chang NH, Park SY. In Vivo Evaluation of 3D-Printed Polycaprolactone Scaffold Implantation Combined with β-TCP Powder for Alveolar Bone Augmentation in a Beagle Defect Model. MATERIALS 2018; 11:ma11020238. [PMID: 29401707 PMCID: PMC5848935 DOI: 10.3390/ma11020238] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/21/2017] [Revised: 01/20/2018] [Accepted: 01/31/2018] [Indexed: 01/10/2023]
Abstract
Insufficient bone volume is one of the major challenges encountered by dentists after dental implant placement. This study aimed to evaluate the efficacy of a customized three-dimensional polycaprolactone (3D PCL) scaffold implant fabricated with a 3D bio-printing system to facilitate rapid alveolar bone regeneration. Saddle-type bone defects were surgically created on the healed site after extracting premolars from the mandibles of four beagle dogs. The defects were radiologically examined using computed tomography for designing a customized 3D PCL scaffold block to fit the defect site. After fabricating 3D PCL scaffolds using rapid prototyping, the scaffolds were implanted into the alveolar bone defects along with β-tricalcium phosphate powder. In vivo analysis showed that the PCL blocks maintained the physical space and bone conductivity around the defects. In addition, no inflammatory infiltrates were observed around the scaffolds. However, new bone formation occurred adjacent to the scaffolds, rather than directly in contact with them. More new bone was observed around PCL blocks with 400/1200 lattices than around blocks with 400/400 lattices, but the difference was not significant. These results indicated the potential of 3D-printed porous PCL scaffolds to promote alveolar bone regeneration for defect healing in dentistry.
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Affiliation(s)
- Su A Park
- Department of Nature-Inspired Nanoconvergence Systems, Korea Institute of Machinery and Materials, Daejeon 34103, Korea.
| | - Hyo-Jung Lee
- Department of Periodontology, Section of Dentistry, Seoul National University Bundang Hospital, Seongnam-si 13620, Korea.
| | - Keun-Suh Kim
- Department of Periodontology, Section of Dentistry, Seoul National University Bundang Hospital, Seongnam-si 13620, Korea.
| | - Sang Jin Lee
- Department of Nature-Inspired Nanoconvergence Systems, Korea Institute of Machinery and Materials, Daejeon 34103, Korea.
| | - Jung-Tae Lee
- Department of Periodontology, Dankook University, Yongin-si 16890, Korea.
| | - Sung-Yeol Kim
- Department of Periodontology, Section of Dentistry, Seoul National University Bundang Hospital, Seongnam-si 13620, Korea.
| | - Na-Hee Chang
- Department of Periodontology, Section of Dentistry, Seoul National University Bundang Hospital, Seongnam-si 13620, Korea.
| | - Shin-Young Park
- Department of Periodontology, Section of Dentistry, Seoul National University Bundang Hospital, Seongnam-si 13620, Korea.
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Wang T, Wu D, Li Y, Li W, Zhang S, Hu K, Zhou H. Substance P incorporation in calcium phosphate cement for dental alveolar bone defect restoration. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 69:546-53. [DOI: 10.1016/j.msec.2016.07.014] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2016] [Revised: 06/30/2016] [Accepted: 07/05/2016] [Indexed: 02/06/2023]
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