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Wang S, Li Y, Wang Y, Huang J, Cai Z, Huang X. In vitro effect of Er: YAG laser irradiation in caries cavity preparation on biobehaviors of adjacent human dental pulp cells in the pulp chamber. JOURNAL OF BIOPHOTONICS 2024; 17:e202300332. [PMID: 38041248 DOI: 10.1002/jbio.202300332] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2023] [Revised: 11/20/2023] [Accepted: 11/20/2023] [Indexed: 12/03/2023]
Abstract
The erbium-doped yttrium aluminum garnet (Er: YAG) laser has been successfully applied in caries removal; however, little is known about proper parameters of Er: YAG laser on different conditions of caries removal, especially the influence of Er: YAG irradiation on human dental pulp cells (hDPCs). Here, we tested the effects of Er: YAG laser at different output energy levels (100, 200, 300, 400, and 500 mJ) on biobehaviors of hDPCs. To simulate clinical deep caries conditions, hDPCs were cultured on the pulpal side of 500-μm-thick dentin disks in an in vitro pulp chamber model. Temperature change, structural change, and ablation depth of dentin disk were also recorded. The findings suggested that the biological behaviors of hDPCs are strongly correlated with the energy output of the Er: YAG laser. Er: YAG laser irradiation at 100 mJ may be proper and safe for deep caries removal since it would not cause any adverse effect on hDPCs biobehaviors.
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Affiliation(s)
- Shaofeng Wang
- Fujian Key Laboratory of Oral Diseases & Fujian Provincial Engineering Research Center of Oral Biomaterial & Stomatological Key lab of Fujian College and University, School and Hospital of Stomatology, Fujian Medical University, Fuzhou, China
| | - Yijun Li
- Fujian Key Laboratory of Oral Diseases & Fujian Provincial Engineering Research Center of Oral Biomaterial & Stomatological Key lab of Fujian College and University, School and Hospital of Stomatology, Fujian Medical University, Fuzhou, China
- Stomatological Hospital of Xiamen Medical College & Xiamen Key Laboratory of Stomatological Disease Diagnosis and Treatment, Xiamen, China
| | - Yanhuang Wang
- Fujian Key Laboratory of Oral Diseases & Fujian Provincial Engineering Research Center of Oral Biomaterial & Stomatological Key lab of Fujian College and University, School and Hospital of Stomatology, Fujian Medical University, Fuzhou, China
| | - Jing Huang
- Fujian Key Laboratory of Oral Diseases & Fujian Provincial Engineering Research Center of Oral Biomaterial & Stomatological Key lab of Fujian College and University, School and Hospital of Stomatology, Fujian Medical University, Fuzhou, China
| | - Zhiyu Cai
- Department of Stomatology, Fujian Medical University Union Hospital, Fuzhou, China
| | - Xiaojing Huang
- Fujian Key Laboratory of Oral Diseases & Fujian Provincial Engineering Research Center of Oral Biomaterial & Stomatological Key lab of Fujian College and University, School and Hospital of Stomatology, Fujian Medical University, Fuzhou, China
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Wang CH, Mutalik C, Yougbaré S, Teng NC, Kuo TR. Calcium Phosphate Nanoclusters for the Repair of Tooth Enamel Erosion. NANOMATERIALS 2022; 12:nano12121997. [PMID: 35745336 PMCID: PMC9230511 DOI: 10.3390/nano12121997] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Revised: 06/07/2022] [Accepted: 06/07/2022] [Indexed: 02/01/2023]
Abstract
The artificial repair of tooth enamel is still an urgent requirement because it has a complicated and well-arranged structure. Herein, calcium phosphate nanoclusters (CaP NCs) were synthesized, via a facile approach, for application in the repair of tooth enamel erosion. Structural and optical characterizations validated the successful preparation of spherical CaP NCs, with an average size of 2.1 ± 0.11 nm. By evaporating the ethanol and triethylamine (TEA) solvents, pure CaP was produced, which was further used to repair the tooth enamel. Simulated caries lesions were achieved via phosphoric acid etching to cause damage to enamel rods. After repair, the damaged enamel rods were directly covered with CaP. According to microhardness testing, after repair with CaP NCs, the hardness value of the tooth enamel with acid etching increased to a similar level to that of normal tooth enamel. The results of the microhardness test indicated that CaP NCs revealed great potential for repairing tooth enamel erosion. Our work demonstrates a promising potential for treating the early stage of tooth erosion with CaP NCs. Based on these findings, we believe that stable CaP NCs can be employed as a precursor for the tunable, effective repair of tooth enamel in the near future.
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Affiliation(s)
- Chia-Hsien Wang
- Division of Prosthodontic Dentistry, Department of Dentistry, Taipei Medical University Hospital, Taipei 11031, Taiwan;
| | - Chinmaya Mutalik
- International Ph.D. Program in Biomedical Engineering, College of Biomedical Engineering, Taipei Medical University, Taipei 11031, Taiwan;
| | - Sibidou Yougbaré
- Institut de Recherche en Sciences de la Santé/Direction Régionale du Centre Ouest (IRSS/DRCO), Nanoro BP 218, 11, Burkina Faso;
| | - Nai-Chia Teng
- School of Dentistry, College of Oral Medicine, Taipei Medical University, Taipei 11031, Taiwan
- Dental Department, Taipei Medical University Hospital, Taipei 11031, Taiwan
- Correspondence: (N.-C.T.); (T.-R.K.)
| | - Tsung-Rong Kuo
- International Ph.D. Program in Biomedical Engineering, College of Biomedical Engineering, Taipei Medical University, Taipei 11031, Taiwan;
- Graduate Institute of Nanomedicine and Medical Engineering, College of Biomedical Engineering, Taipei Medical University, Taipei 11031, Taiwan
- Correspondence: (N.-C.T.); (T.-R.K.)
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Chan YH, Lew WZ, Lu E, Loretz T, Lu L, Lin CT, Feng SW. An evaluation of the biocompatibility and osseointegration of novel glass fiber reinforced composite implants: In vitro and in vivo studies. Dent Mater 2018; 34:470-485. [DOI: 10.1016/j.dental.2017.12.001] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2017] [Revised: 11/16/2017] [Accepted: 12/08/2017] [Indexed: 01/21/2023]
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Baek KW, Deibel W, Marinov D, Griessen M, Bruno A, Zeilhofer HF, Cattin P, Juergens P. Clinical applicability of robot-guided contact-free laser osteotomy in cranio-maxillo-facial surgery: in-vitro simulation and in-vivo surgery in minipig mandibles. Br J Oral Maxillofac Surg 2015; 53:976-81. [PMID: 26305341 DOI: 10.1016/j.bjoms.2015.07.019] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2014] [Accepted: 07/24/2015] [Indexed: 11/25/2022]
Abstract
Laser was being used in medicine soon after its invention. However, it has been possible to excise hard tissue with lasers only recently, and the Er:YAG laser is now established in the treatment of damaged teeth. Recently experimental studies have investigated its use in bone surgery, where its major advantages are freedom of cutting geometry and precision. However, these advantages become apparent only when the system is used with robotic guidance. The main challenge is ergonomic integration of the laser and the robot, otherwise the surgeon's space in the operating theatre is obstructed during the procedure. Here we present our first experiences with an integrated, miniaturised laser system guided by a surgical robot. An Er:YAG laser source and the corresponding optical system were integrated into a composite casing that was mounted on a surgical robotic arm. The robot-guided laser system was connected to a computer-assisted preoperative planning and intraoperative navigation system, and the laser osteotome was used in an operating theatre to create defects of different shapes in the mandibles of 6 minipigs. Similar defects were created on the opposite side with a piezoelectric (PZE) osteotome and a conventional drill guided by a surgeon. The performance was analysed from the points of view of the workflow, ergonomics, ease of use, and safety features. The integrated robot-guided laser osteotome can be ergonomically used in the operating theatre. The computer-assisted and robot-guided laser osteotome is likely to be suitable for clinical use for ostectomies that require considerable accuracy and individual shape.
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Affiliation(s)
- K-W Baek
- Department of Cranio-Maxillofacial Surgery, University Hospital Basel, Spitalstrasse 21, 4031 Basel, Switzerland; Hightech Research Centre of Cranio-Maxillofacial Surgery, University of Basel, Gewerbestrasse 14, 4123 Allschwil, Switzerland.
| | - W Deibel
- Medical Image Analysis Center, Department of Biomedical Engineering, University of Basel, Gewerbestrasse 14, 4123 Allschwil, Switzerland; Advanced Osteotomy Tools AG, Gewerbestrasse 14, 4123 Allschwil, Switzerland.
| | - D Marinov
- Advanced Osteotomy Tools AG, Gewerbestrasse 14, 4123 Allschwil, Switzerland.
| | - M Griessen
- Medical Image Analysis Center, Department of Biomedical Engineering, University of Basel, Gewerbestrasse 14, 4123 Allschwil, Switzerland; Advanced Osteotomy Tools AG, Gewerbestrasse 14, 4123 Allschwil, Switzerland.
| | - A Bruno
- Advanced Osteotomy Tools AG, Gewerbestrasse 14, 4123 Allschwil, Switzerland.
| | - H-F Zeilhofer
- Department of Cranio-Maxillofacial Surgery, University Hospital Basel, Spitalstrasse 21, 4031 Basel, Switzerland; Hightech Research Centre of Cranio-Maxillofacial Surgery, University of Basel, Gewerbestrasse 14, 4123 Allschwil, Switzerland.
| | - Ph Cattin
- Medical Image Analysis Center, Department of Biomedical Engineering, University of Basel, Gewerbestrasse 14, 4123 Allschwil, Switzerland.
| | - Ph Juergens
- Department of Cranio-Maxillofacial Surgery, University Hospital Basel, Spitalstrasse 21, 4031 Basel, Switzerland; Hightech Research Centre of Cranio-Maxillofacial Surgery, University of Basel, Gewerbestrasse 14, 4123 Allschwil, Switzerland.
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Baek KW, Deibel W, Marinov D, Griessen M, Dard M, Bruno A, Zeilhofer HF, Cattin P, Juergens P. A comparative investigation of bone surface after cutting with mechanical tools and Er:YAG laser. Lasers Surg Med 2015; 47:426-32. [PMID: 25945815 DOI: 10.1002/lsm.22352] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/20/2015] [Indexed: 11/06/2022]
Abstract
BACKGROUND AND OBJECTIVES Despite of the long history of medical application, laser ablation of bone tissue became successful only recently. Laser bone cutting is proven to have higher accuracy and to increase bone healing compared to conventional mechanical bone cutting. But the reason of subsequent better healing is not biologically explained yet. In this study we present our experience with an integrated miniaturized laser system mounted on a surgical lightweight robotic arm. STUDY DESIGN/MATERIALS AND METHODS An Erbium-doped Yttrium Aluminium Garnet (Er:YAG) laser and a piezoelectric (PZE) osteotome were used for comparison. In six grown up female Göttingen minipigs, comparative surgical interventions were done on the edentulous mandibular ridge. Our laser system was used to create different shapes of bone defects on the left side of the mandible. On the contralateral side, similar bone defects were created by PZE osteotome. Small bone samples were harvested to compare the immediate post-operative cut surface. RESULTS The analysis of the cut surface of the laser osteotomy and conventional mechanical osteotomy revealed an essential difference. The scanning electron microscopy (SEM) analysis showed biologically open cut surfaces from the laser osteotomy. The samples from PZE osteotomy showed a flattened tissue structure over the cut surface, resembling the "smear layer" from tooth preparation. CONCLUSIONS We concluded that our new finding with the mechanical osteotomy suggests a biological explanation to the expected difference in subsequent bone healing. Our hypothesis is that the difference of surface characteristic yields to different bleeding pattern and subsequently results in different bone healing. The analyses of bone healing will support our hypothesis.
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Affiliation(s)
- Kyung-Won Baek
- Department of Cranio-Maxillofacial Surgery, University Hospital Basel, Spitalstrasse 21, Basel, 4031, Switzerland.,Hightech Research Centre of Cranio-Maxillofacial Surgery, University of Basel, Schanzenstrasse 46, Basel, 4031, Switzerland
| | - Waldemar Deibel
- Medical Image Analysis Centre, University of Basel, Spitalstrasse 21, Basel, 4031, Switzerland.,Advanced Osteotomy Tools AG, Spitalstrasse 21, Basel, 4031, Switzerland
| | - Dilyan Marinov
- Advanced Osteotomy Tools AG, Spitalstrasse 21, Basel, 4031, Switzerland
| | - Mathias Griessen
- Medical Image Analysis Centre, University of Basel, Spitalstrasse 21, Basel, 4031, Switzerland.,Advanced Osteotomy Tools AG, Spitalstrasse 21, Basel, 4031, Switzerland
| | - Michel Dard
- Periodontology and Implant Dentistry, New York University College of Dentistry, 345E. 24th Street, New York City, 10010
| | - Alfredo Bruno
- Advanced Osteotomy Tools AG, Spitalstrasse 21, Basel, 4031, Switzerland
| | - Hans-Florian Zeilhofer
- Department of Cranio-Maxillofacial Surgery, University Hospital Basel, Spitalstrasse 21, Basel, 4031, Switzerland.,Hightech Research Centre of Cranio-Maxillofacial Surgery, University of Basel, Schanzenstrasse 46, Basel, 4031, Switzerland
| | - Philippe Cattin
- Medical Image Analysis Centre, University of Basel, Spitalstrasse 21, Basel, 4031, Switzerland
| | - Philipp Juergens
- Department of Cranio-Maxillofacial Surgery, University Hospital Basel, Spitalstrasse 21, Basel, 4031, Switzerland.,Hightech Research Centre of Cranio-Maxillofacial Surgery, University of Basel, Schanzenstrasse 46, Basel, 4031, Switzerland
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Uskoković V, Desai TA. Does translational symmetry matter on the micro scale? Fibroblastic and osteoblastic interactions with the topographically distinct poly(ε-caprolactone)/hydroxyapatite thin films. ACS APPLIED MATERIALS & INTERFACES 2014; 6:13209-20. [PMID: 25014232 PMCID: PMC4134142 DOI: 10.1021/am503043t] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2014] [Accepted: 07/11/2014] [Indexed: 05/23/2023]
Abstract
Material composition and topography of the cell-contacting material interface are important considerations in the design of biomaterials at the nano and micro scales. This study is one of the first to have assessed the osteoblastic response to micropatterned polymer-ceramic composite surfaces. In particular, the effect of topographic variations of composite poly(ε-caprolactone)/hydroxyapatite (PCL/HAp) films on viability, proliferation, migration and osteogenesis of fibroblastic and osteoblastic MC3T3-E1 cells was evaluated. To that end, three different micropatterned PCL/HAp films were compared: flat and textured, the latter of which included films comprising periodically arranged and randomly distributed oval topographic features 10 μm in diameter, 20 μm in separation and 10 μm in height, comparable to the dimensions of MC3T3-E1 cells. PCL/HAp films were fabricated by the combination of a bottom-up, soft chemical synthesis of the ceramic, nanoparticulate phase and a top-down, photolithographic technique for imprinting fine, microscale features on them. X-ray diffraction analysis indicated an isotropic orientation of both the polymeric chains and HAp crystallites in the composite samples. Biocompatibility tests indicated no significant decrease in their viability when grown on PCL/HAp films. Fibroblast proliferation and migration onto PCL/HAp films proceeded slower than on the control borosilicate glass, with the flat composite film fostering more cell migration activity than the films containing topographic features. The gene expression of seven analyzed osteogenic markers, including procollagen type I, osteocalcin, osteopontin, alkaline phosphatase, and the transcription factors Runx2 and TGFβ-1, was, however, consistently upregulated in cells grown on PCL/HAp films comprising periodically ordered topographic features, suggesting that the higher levels of symmetry of the topographic ordering impose a moderate mechanochemical stress on the adherent cells and thus promote a more favorable osteogenic response. The obtained results suggest that topography can be a more important determinant of the cell/surface interaction than the surface chemistry and/or stiffness as well as that the regularity of the distribution of topographic features can be a more important variable than the topographic features per se.
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Affiliation(s)
- Vuk Uskoković
- Therapeutic Micro and
Nanotechnology Laboratory, Department of Bioengineering
and Therapeutic Sciences, University of
California, San Francisco, San
Francisco, California 94158-2330, United States
- Advanced Materials and Nanobiotechnology Laboratory, Department of Bioengineering, University
of Illinois, Chicago, Illinois 60607-7052, United States
| | - Tejal A. Desai
- Therapeutic Micro and
Nanotechnology Laboratory, Department of Bioengineering
and Therapeutic Sciences, University of
California, San Francisco, San
Francisco, California 94158-2330, United States
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