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Mamani-Valeriano HL, Silva NP, Nímia HH, Pereira-Silva M, Oliveira MEDFS, Rodrigues LGDS, Tavares PMH, Hadad H, de Jesus LK, Santos AFP, Barbosa DDB, Poli PP, Maiorana C, de Carvalho PSP, Okamoto R, Souza FÁ. Bone Incorporation of a Poly (L-Lactide-Co-D, L-Lactide) Internal Fixation Device in a Rat's Tibia: Microtomographic, Confocal LASER, and Histomorphometric Analysis. BIOLOGY 2024; 13:471. [PMID: 39056666 PMCID: PMC11273520 DOI: 10.3390/biology13070471] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2024] [Revised: 06/14/2024] [Accepted: 06/19/2024] [Indexed: 07/28/2024]
Abstract
This study evaluated the bone incorporation process of a screw-shaped internal fixation device made of poly (L-lactide-co-D, L-lactide) (PLDLLA). Thirty-two male Wistar rats received 32 fixation devices (2 mm × 6 mm) randomly assigned to either the right or left tibia and one implant in each animal. After 7, 14, 28, and 42 days, the rats were euthanized and the specimens were subjected to microtomographic computed tomography (microCT) and histomorphometric analyses to evaluate bone interface contact (BIC%) and new bone formation (NBF%) in cortical and cancellous bone areas. The animals euthanized on days 28 and 42 were treated with calcein and alizarin red, and confocal LASER microscopy was performed to determine the mineral apposition rate (MAR). Micro-CT revealed a higher percentage of bone volume (p < 0.006), trabecular separation (p < 0.001), and BIC in the cortical (p < 0.001) and cancellous (p = 0.003) areas at 28 and 42 days than at 7 and 14 days. The cortical NBF at 42 days was greater than that at 7 and 14 days (p = 0.022). No statistically significant differences were observed in cancellous NBF or MAR at 28 and 42 days. Based on these results, it can be seen that the PLDLLA internal fixation device is biocompatible and allows new bone formation around the screw thread.
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Affiliation(s)
- Harrisson Lucho Mamani-Valeriano
- Department of Diagnosis and Surgery, School of Dentistry, São Paulo State University (UNESP), Araçatuba 16010-380, SP, Brazil; (H.L.M.-V.); (M.P.-S.); (M.E.d.F.S.O.); (L.G.d.S.R.); (P.M.H.T.); (H.H.); (L.K.d.J.); (A.F.P.S.)
| | - Nelson Padilha Silva
- Department of Diagnosis and Surgery, School of Dentistry, São Paulo State University (UNESP), Araçatuba 16010-380, SP, Brazil; (H.L.M.-V.); (M.P.-S.); (M.E.d.F.S.O.); (L.G.d.S.R.); (P.M.H.T.); (H.H.); (L.K.d.J.); (A.F.P.S.)
| | - Heloisa Helena Nímia
- Department of Dental Materials and Prothesis, School of Dentistry, São Paulo State University (UNESP), Araçatuba 16010-380, SP, Brazil; (H.H.N.); (D.d.B.B.)
| | - Maísa Pereira-Silva
- Department of Diagnosis and Surgery, School of Dentistry, São Paulo State University (UNESP), Araçatuba 16010-380, SP, Brazil; (H.L.M.-V.); (M.P.-S.); (M.E.d.F.S.O.); (L.G.d.S.R.); (P.M.H.T.); (H.H.); (L.K.d.J.); (A.F.P.S.)
| | - Maria Eduarda de Freitas Santana Oliveira
- Department of Diagnosis and Surgery, School of Dentistry, São Paulo State University (UNESP), Araçatuba 16010-380, SP, Brazil; (H.L.M.-V.); (M.P.-S.); (M.E.d.F.S.O.); (L.G.d.S.R.); (P.M.H.T.); (H.H.); (L.K.d.J.); (A.F.P.S.)
| | - Letícia Gabriella de Souza Rodrigues
- Department of Diagnosis and Surgery, School of Dentistry, São Paulo State University (UNESP), Araçatuba 16010-380, SP, Brazil; (H.L.M.-V.); (M.P.-S.); (M.E.d.F.S.O.); (L.G.d.S.R.); (P.M.H.T.); (H.H.); (L.K.d.J.); (A.F.P.S.)
| | - Paulo Matheus Honda Tavares
- Department of Diagnosis and Surgery, School of Dentistry, São Paulo State University (UNESP), Araçatuba 16010-380, SP, Brazil; (H.L.M.-V.); (M.P.-S.); (M.E.d.F.S.O.); (L.G.d.S.R.); (P.M.H.T.); (H.H.); (L.K.d.J.); (A.F.P.S.)
| | - Henrique Hadad
- Department of Diagnosis and Surgery, School of Dentistry, São Paulo State University (UNESP), Araçatuba 16010-380, SP, Brazil; (H.L.M.-V.); (M.P.-S.); (M.E.d.F.S.O.); (L.G.d.S.R.); (P.M.H.T.); (H.H.); (L.K.d.J.); (A.F.P.S.)
| | - Laís Kawamata de Jesus
- Department of Diagnosis and Surgery, School of Dentistry, São Paulo State University (UNESP), Araçatuba 16010-380, SP, Brazil; (H.L.M.-V.); (M.P.-S.); (M.E.d.F.S.O.); (L.G.d.S.R.); (P.M.H.T.); (H.H.); (L.K.d.J.); (A.F.P.S.)
| | - Ana Flávia Piquera Santos
- Department of Diagnosis and Surgery, School of Dentistry, São Paulo State University (UNESP), Araçatuba 16010-380, SP, Brazil; (H.L.M.-V.); (M.P.-S.); (M.E.d.F.S.O.); (L.G.d.S.R.); (P.M.H.T.); (H.H.); (L.K.d.J.); (A.F.P.S.)
| | - Débora de Barros Barbosa
- Department of Dental Materials and Prothesis, School of Dentistry, São Paulo State University (UNESP), Araçatuba 16010-380, SP, Brazil; (H.H.N.); (D.d.B.B.)
| | - Pier Paolo Poli
- Implant Center for Edentulism and Jawbone Atrophies, Maxillofacial Surgery and Odontostomatology Unit, Fondazione IRCCS Cà Granda Ospedale Maggiore Policlinico, 20122 Milan, Italy; (P.P.P.); (C.M.)
- Department of Biomedical, Surgical and Dental Sciences, University of Milan, 20122 Milan, Italy
| | - Carlo Maiorana
- Implant Center for Edentulism and Jawbone Atrophies, Maxillofacial Surgery and Odontostomatology Unit, Fondazione IRCCS Cà Granda Ospedale Maggiore Policlinico, 20122 Milan, Italy; (P.P.P.); (C.M.)
- Department of Biomedical, Surgical and Dental Sciences, University of Milan, 20122 Milan, Italy
| | - Paulo Sergio Perri de Carvalho
- Implant Dentistry Postgraduate Program, São Leopoldo Mandic School of Dentistry and Research Center, Campinas 13045-755, SP, Brazil;
| | - Roberta Okamoto
- Department of Basic Sciences, School of Dentistry, São Paulo State University (UNESP), Araçatuba 16015-253, SP, Brazil;
| | - Francisley Ávila Souza
- Department of Diagnosis and Surgery, School of Dentistry, São Paulo State University (UNESP), Araçatuba 16010-380, SP, Brazil; (H.L.M.-V.); (M.P.-S.); (M.E.d.F.S.O.); (L.G.d.S.R.); (P.M.H.T.); (H.H.); (L.K.d.J.); (A.F.P.S.)
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Santos JSD, Mulinari-Santos G, DE Souza Batista FR, Gomes-Ferreira PHS, Palin LP, Antoniali C, Okamoto R. Analysis of peri-implant bone tissue between hydrophilic and rough implant surfaces in spontaneously hypertensive rats treated with losartan. J Appl Oral Sci 2024; 32:e20230374. [PMID: 38922240 PMCID: PMC11182640 DOI: 10.1590/1678-7757-2023-0374] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2023] [Revised: 02/02/2024] [Accepted: 02/06/2024] [Indexed: 06/27/2024] Open
Abstract
OBJECTIVES to evaluate the morphological and functional characteristics of the peri-implant bone tissue that was formed during the healing process by the placement implants using two different surface treatments: hydrophilic Acqua™ (ACQ) and rough NeoPoros™ (NEO), in spontaneously hypertensive (SHR) and normotensive rats (Wistar) whether or not treated with losartan. METHODOLOGY In total, 96 male rats (48 Wistar and 48 SHR) were divided into eight subgroups: absolute control rough (COA NEO), absolute control hydrophilic (COA ACQ), losartan control rough (COL NEO), losartan control hydrophilic (COL ACQ), SHR absolute rough (SHR NEO), SHR absolute hydrophilic (SHR ACQ), SHR losartan rough (SHRL NEO), and SHR losartan hydrophilic (SHRL ACQ). The rats medicated with losartan received daily doses of the medication. NeoPoros™ and Acqua™ implants were installed in the tibiae of the rats. After 14 and 42 days of the surgery, the fluorochromes calcein and alizarin were injected in the rats. The animals were euthanized 67 days after treatment. The collected samples were analyzed by immunohistochemistry, biomechanics, microcomputerized tomography, and laser confocal scanning microscopy analysis. RESULTS The osteocalcin (OC) and vascular endothelium growth factor (VEGF) proteins had moderate expression in the SHRL ACQ subgroup. The same subgroup also had the highest implant removal torque. Regarding microarchitectural characteristics, a greater number of trabeculae was noted in the control animals that were treated with losartan. In the bone mineralization activity, it was observed that the Acqua™ surface triggered higher values of MAR (mineral apposition rate) in the COA, COL, and SHRL groups (p<0.05). CONCLUSION the two implant surface types showed similar responses regarding the characteristics of the peri-implant bone tissue, even though the ACQ surface seems to improve the early stages of osseointegration.
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Affiliation(s)
- Jaqueline Silva Dos Santos
- Universidade Estadual Paulista "Júlio de Mesquita Filho", Faculdade de Odontologia de Araçatuba, Departamento de Ciências Básicas, Araçatuba, Brasil
| | - Gabriel Mulinari-Santos
- Universidade Estadual Paulista "Júlio de Mesquita Filho", Faculdade de Odontologia de Araçatuba, Departamento de Diagnóstico e Cirurgia, Araçatuba, Brasil
| | - Fábio Roberto DE Souza Batista
- Universidade Estadual Paulista "Júlio de Mesquita Filho", Faculdade de Odontologia de Araçatuba, Departamento de Diagnóstico e Cirurgia, Araçatuba, Brasil
| | - Pedro Henrique Silva Gomes-Ferreira
- Universidade Estadual Paulista "Júlio de Mesquita Filho", Faculdade de Odontologia de Araçatuba, Departamento de Diagnóstico e Cirurgia, Araçatuba, Brasil
| | - Letícia Pitol Palin
- Universidade Estadual Paulista "Júlio de Mesquita Filho", Faculdade de Odontologia de Araçatuba, Departamento de Diagnóstico e Cirurgia, Araçatuba, Brasil
| | - Cristina Antoniali
- Universidade Estadual Paulista "Júlio de Mesquita Filho", Faculdade de Odontologia de Araçatuba, Departamento de Ciências Básicas, Araçatuba, Brasil
| | - Roberta Okamoto
- Universidade Estadual Paulista "Júlio de Mesquita Filho", Faculdade de Odontologia de Araçatuba, Departamento de Ciências Básicas, Araçatuba, Brasil
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Wajima CS, Pitol-Palin L, de Souza Batista FR, Dos Santos PH, Matsushita DH, Okamoto R. Morphological and biomechanical characterization of long bones and peri-implant bone repair in type 2 diabetic rats treated with resveratrol. Sci Rep 2024; 14:2860. [PMID: 38310154 PMCID: PMC10838324 DOI: 10.1038/s41598-024-53260-4] [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: 06/12/2023] [Accepted: 01/30/2024] [Indexed: 02/05/2024] Open
Abstract
Type 2 diabetes interferes with bone remodeling mechanisms, requiring studies to reverse this damage, and resveratrol is a polyphenol with rich properties. This study aimed to characterize the long bone morphology and peri-implant biomechanics of normoglycemic and type 2 diabetic animals treated with resveratrol. Thirty-two male Wistar rats were used and divided into normoglycemic and diabetic with or without treatment. They had the installation of implants in the tibia and treatment with oral resveratrol within 45 days. Resveratrol was responsible for weight homeostasis and decreased glycemic levels in rats with type 2 diabetes. The three-point bending testing, resveratrol showed positive effects on the biomechanics of long bones, corroborating a more resistant bone in comparison to untreated diabetics. Micro-ct revealed how bone metabolism is affected by systemic disease, decreasing bone quality. The counter-torque of normoglycemic animals showed superior osseointegration to diabetes, with no differences in the administration of the polyphenol, showing the sovereignty of the deleterious effects of the disease when there is a tissue lesion and an inflammatory picture installed. Overall, resveratrol acted positively in the etiopathogenesis of type 2 diabetes and revealed positive effects on the strength of long bones.
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Affiliation(s)
- Carolina Sayuri Wajima
- Department of Basic Science, Araçatuba School of Dentistry, São Paulo State University (UNESP), Araçatuba, São Paulo, Brazil
| | - Letícia Pitol-Palin
- Department of Diagnosis and Surgery, Araçatuba School of Dentistry, São Paulo State University (UNESP), Araçatuba, São Paulo, Brazil
| | - Fábio Roberto de Souza Batista
- Department of Diagnosis and Surgery, Araçatuba School of Dentistry, São Paulo State University (UNESP), Araçatuba, São Paulo, Brazil
| | | | - Doris Hissako Matsushita
- Department of Basic Science, Araçatuba School of Dentistry, São Paulo State University (UNESP), Araçatuba, São Paulo, Brazil
| | - Roberta Okamoto
- Department of Basic Science, Araçatuba School of Dentistry, São Paulo State University (UNESP), Araçatuba, São Paulo, Brazil.
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Mulinari-Santos G, dos Santos JS, Kitagawa IL, de Souza Batista FR, Botacin PR, Antoniali C, Lisboa-Filho PN, Okamoto R. Estrogen Deficiency Impairs Osseointegration in Hypertensive Rats Even Treated with Alendronate Coated on the Implant Surface. J Funct Biomater 2023; 14:471. [PMID: 37754885 PMCID: PMC10532300 DOI: 10.3390/jfb14090471] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2023] [Revised: 09/03/2023] [Accepted: 09/11/2023] [Indexed: 09/28/2023] Open
Abstract
Hypertension and estrogen deficiency can affect bone metabolism and therefore increase the risk of osseointegration. Antihypertensive drugs such as losartan not only control blood pressure but also enhance bone healing. In addition, alendronate sodium is widely used to treat postmenopausal osteoporosis. Hence, we evaluated the effect of systemic antihypertensive and local alendronate coted on implants on osseointegration under hypertensive and estrogen-deficiency conditions. A total of 64 spontaneously hypertensive rats (SHRs) treated with losartan were randomly divided according to the estrogen-deficiency induction by ovariectomy (OVX) or not (SHAM), and whether the implant surface was coated with sodium alendronate (ALE) or not, resulting in four groups: SHR SHAM, SHR SHAM ALE, SHR OVX, and SHR OVX ALE. The removal torque, microcomputed tomography, and epifluorescence microscopy were the adopted analyses. The hypertensive and estrogen-deficiency animals presented a lower removal torque even when treated with alendronate on implant surface. The microcomputed tomography revealed a higher bone volume and bone-to-implant contact in the SHRs than the SHR OVX rats. Epifluorescence showed a decreased mineral apposition ratio in the SHR OVX ALE group. The data presented indicate that estrogen deficiency impairs osseointegration in hypertensive rats; in addition, alendronate coated on the implant surface does not fully reverse this impaired condition caused by estrogen deficiency.
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Affiliation(s)
- Gabriel Mulinari-Santos
- Department of Diagnostic and Surgery, School of Dentistry, São Paulo State University (UNESP), Araçatuba, SP, Brazil
| | - Jaqueline Silva dos Santos
- Department of Basic Science, School of Dentistry, São Paulo State University (UNESP), Araçatuba, SP, Brazil
| | - Igor Lebedenco Kitagawa
- Federal Institute of Education, Science and Technology of São Paulo (IFSP), Birigui, SP, Brazil
| | | | - Paulo Roberto Botacin
- Department of Basic Science, School of Dentistry, São Paulo State University (UNESP), Araçatuba, SP, Brazil
| | - Cristina Antoniali
- Department of Basic Science, School of Dentistry, São Paulo State University (UNESP), Araçatuba, SP, Brazil
| | | | - Roberta Okamoto
- Department of Basic Science, School of Dentistry, São Paulo State University (UNESP), Araçatuba, SP, Brazil
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Pontes RB, Colombari DSA, De Paula PM, Colombari E, Andrade CAF, De Luca LA, Menani JV. Sympathetic and angiotensinergic activity in spontaneously hypertensive rats treated with 3-amino-1,2,4-triazole. Auton Neurosci 2023; 248:103107. [PMID: 37454409 DOI: 10.1016/j.autneu.2023.103107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Revised: 06/28/2023] [Accepted: 07/07/2023] [Indexed: 07/18/2023]
Abstract
Previous studies from our laboratory have shown that the pressor response to intracerebroventricular (icv) administered ANG II in normotensive rats or spontaneously hypertensive rats (SHRs) is attenuated by increased central H2O2 concentration, produced either by direct H2O2 icv injection or by increased endogenous H2O2 centrally in response to local catalase inhibition with 3-amino-1,2,4-triazole (ATZ). In the present study, we evaluated the effects of ATZ administered peripherally on arterial pressure and sympathetic and angiotensinergic activity in SHRs. Male SHRs weighing 280-330 g were used. Mean arterial pressure (MAP) and heart rate (HR) were recorded in conscious freely moving SHRs. Acute intravenous injection of ATZ (300 mg/kg of body weight) did not modify MAP and HR during the next 4 h, however, the treatment with ATZ (300 mg/kg of body weight twice per day) for 3 days reduced MAP (144 ± 6, vs. saline, 183 ± 13 mmHg), without changing HR. Intravenous hexamethonium (ganglionic blocker) produced a smaller decrease in MAP 4 h after ATZ (-25 ± 3, vs saline -38 ± 4 mmHg). Losartan (angiotensinergic AT1 receptor blocker) produced a significant depressor response 4 h after ATZ (-22 ± 4, vs. saline: -2 ± 4 mmHg) and in 3-day ATZ treated SHRs (-25 ± 5, vs. saline: -9 ± 4 mmHg). The results suggest that the treatment with ATZ reduces sympathetic activity in SHRs and simultaneously increases angiotensinergic activity.
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Affiliation(s)
- Roberto Braz Pontes
- Department of Physiology and Pathology, School of Dentistry, São Paulo State University, UNESP, Araraquara, SP, Brazil
| | - Débora S A Colombari
- Department of Physiology and Pathology, School of Dentistry, São Paulo State University, UNESP, Araraquara, SP, Brazil
| | - Patrícia M De Paula
- Department of Physiology and Pathology, School of Dentistry, São Paulo State University, UNESP, Araraquara, SP, Brazil
| | - Eduardo Colombari
- Department of Physiology and Pathology, School of Dentistry, São Paulo State University, UNESP, Araraquara, SP, Brazil
| | - Carina A F Andrade
- Department of Physiology and Pathology, School of Dentistry, São Paulo State University, UNESP, Araraquara, SP, Brazil
| | - Laurival A De Luca
- Department of Physiology and Pathology, School of Dentistry, São Paulo State University, UNESP, Araraquara, SP, Brazil
| | - José V Menani
- Department of Physiology and Pathology, School of Dentistry, São Paulo State University, UNESP, Araraquara, SP, Brazil.
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Jolic M, Sharma S, Palmquist A, Shah FA. The impact of medication on osseointegration and implant anchorage in bone determined using removal torque-A review. Heliyon 2022; 8:e10844. [PMID: 36276721 PMCID: PMC9582727 DOI: 10.1016/j.heliyon.2022.e10844] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2022] [Revised: 08/16/2022] [Accepted: 09/26/2022] [Indexed: 11/06/2022] Open
Abstract
Permanently anchored metal implants are frequently used in dental, craniomaxillofacial, and orthopaedic rehabilitation. The success of such therapies is owed to the phenomenon of osseointegration—the direct connection between the living bone and the implant. The extent of biomechanical anchorage (i.e., physical interlocking between the implant and bone) can be assessed with removal torque (RTQ) measurement. Implant anchorage is strongly influenced by underlying bone quality, involving physicochemical and biological properties such as composition and structural organisation of extracellular matrix, extent of micro-damage, and bone turnover. In this review, we evaluated the impact of various pharmacological agents on osseointegration, from animal experiments conducting RTQ measurements. In addition to substances whose antiresorptive and/or anti-catabolic effects on bone are well-documented (e.g., alendronate, zoledronate, ibandronate, raloxifene, human parathyroid hormone, odanacatib, and the sclerostin monoclonal antibody), positive effects on RTQ have been reported for substances that do not primarily target bone (e.g., aminoguanidine, insulin, losartan, simvastatin, bone morphogenetic protein, alpha-tocopherol, and the combination of silk fibroin powder and platelet-rich fibrin). On the contrary, several substances (e.g., prednisolone, cyclosporin A, cisplatin, and enamel matrix derivative) tend to adversely impact RTQ. While morphometric parameters such as bone-implant contact appear to influence the biomechanical anchorage, increased or decreased RTQ is not always accompanied by corresponding fluctuations in bone-implant contact. This further confirms that factors such as bone quality underpin biomechanical anchorage of metal implants. Several fundamental questions on drug metabolism and bioavailability, drug dosage, animal-to-human translation, and the consequences of treatment interruption remain yet unanswered. Effects of pharmacological agents on osseointegration of metal implants are reviewed. Removal torque is considered as an objective measure of osseointegration. Most investigated anabolic agents are alendronate, zoledronate, and ibandronate. hPTH has a positive effect while cyclosporin A and cisplatin have negative effects. Correction of underlying systemic disorders leads to improved osseointegration.
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Moreira AC, Fernandes CP, Oliveira MVD, Duailibi MT, Ribeiro AA, Duailibi SE, Kfouri FDÁ, Mantovani IF. The effect of pores and connections geometries on bone ingrowth into titanium scaffolds: an assessment based on 3D microCT images. Biomed Mater 2021; 16. [PMID: 34492651 DOI: 10.1088/1748-605x/ac246b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2021] [Accepted: 09/07/2021] [Indexed: 11/11/2022]
Abstract
In order to support bone tissue regeneration, porous biomaterial implants (scaffolds) must offer chemical and mechanical properties, besides favorable fluid transport. Titanium implants provide these requirements, and depending on their microstructural parameters, the osteointegration process can be stimulated. The pore structure of scaffolds plays an essential role in this process, guiding fluid transport for neo-bone regeneration. The objective of this work was to analyze geometric and morphologic parameters of the porous microstructure of implants and analyze their influences in the bone regeneration process, and then discuss which parameters are the most fundamental. Bone ingrowths into two different sorts of porous titanium implants were analyzed after 7, 14, 21, 28, and 35 incubation days in experimental animal models. Measurements were accomplished with x-ray microtomography image analysis from rabbit tibiae, applying a pore-network technique. Taking into account the most favorable pore sizes for neo-bone regeneration, a novel approach was employed to assess the influence of the pore structure on this process: the analyses were carried out considering minimum pore and connection sizes. With this technique, pores and connections were analyzed separately and the influence of connectivity was deeply evaluated. This investigation showed a considerable influence of the size of connections on the permeability parameter and consequently on the neo-bone regeneration. The results indicate that the processing of porous scaffolds must be focused on deliver pore connections that stimulate the transport of fluids throughout the implant to be applied as a bone replacer.
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Affiliation(s)
- Anderson Camargo Moreira
- Department of Mechanical Engineering (EMC/PGMAT), Federal University of Santa Catarina (UFSC), Laboratory of Porous Media and Thermophysical Properties (LMPT), Florianópolis, Brazil
| | - Celso Peres Fernandes
- Department of Mechanical Engineering (EMC/PGMAT), Federal University of Santa Catarina (UFSC), Laboratory of Porous Media and Thermophysical Properties (LMPT), Florianópolis, Brazil
| | - Marize Varella de Oliveira
- Laboratory of Powder Technology, Division of Materials, National Institute of Technology, Rio de Janeiro, Brazil
| | - Monica Talarico Duailibi
- Tissue Engineering and Biofabrication Lab, Cellular and Molecular Technology Center, Federal University of São Paulo, CTCMol-UNIFESP, São Paulo, Brazil
| | - Alexandre Antunes Ribeiro
- Laboratory of Powder Technology, Division of Materials, National Institute of Technology, Rio de Janeiro, Brazil
| | - Silvio Eduardo Duailibi
- Tissue Engineering and Biofabrication Lab, Cellular and Molecular Technology Center, Federal University of São Paulo, CTCMol-UNIFESP, São Paulo, Brazil
| | - Flávio de Ávila Kfouri
- Tissue Engineering and Biofabrication Lab, Cellular and Molecular Technology Center, Federal University of São Paulo, CTCMol-UNIFESP, São Paulo, Brazil
| | - Iara Frangiotti Mantovani
- Department of Mechanical Engineering (EMC/PGMAT), Federal University of Santa Catarina (UFSC), Laboratory of Porous Media and Thermophysical Properties (LMPT), Florianópolis, Brazil
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Yu H, Zhou A, Liu J, Tang Y, Yuan Q, Man Y, Xiang L. Management of systemic risk factors ahead of dental implant therapy: A beard well lathered is half shaved. J Leukoc Biol 2021; 110:591-604. [PMID: 34231923 DOI: 10.1002/jlb.6mr0621-760rr] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2020] [Revised: 06/18/2021] [Accepted: 06/22/2021] [Indexed: 02/05/2023] Open
Abstract
As the most successful therapy for missing teeth, dental implant has become increasingly prevalent around the world. A lot of papers have reported diverse local risk factors affecting the success and survival rate of dental implants, either for a short or a long period. However, there are also many types of systemic disorders or relatively administrated medicine that may jeopardize the security and success of dental implant treatment. Additionally, the coronavirus disease 2019 pandemic also poses a challenge to dental implant clinicians. Some of these risk factors are clinically common but to some extent unfamiliar to dentists, thus optimal measurements are often lacking when they occur in dental clinics. In this review, we analyze potential systemic risk factors that may affect the success rate of dental implants. Some of them may affect bone mineral density or enhance the likelihood of local infection, thus impeding osseointegration. Others may even systemically increase the risk of the surgery and threaten patients' life. In order to help novices receive high-risk patients who need to get dental implant treatment in a more reasonable way, we accordingly review recent research results and clinical experiments to discuss promising precautions, such as stopping drugs that impact bone mineral density or the operation, and addressing any perturbations on vital signs.
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Affiliation(s)
- Hui Yu
- State Key Laboratory of Oral Diseases and National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China.,Department of Oral Implantology, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Anqi Zhou
- State Key Laboratory of Oral Diseases and National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Jiayi Liu
- State Key Laboratory of Oral Diseases and National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Yufei Tang
- State Key Laboratory of Oral Diseases and National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China.,Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Quan Yuan
- State Key Laboratory of Oral Diseases and National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China.,Department of Oral Implantology, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Yi Man
- State Key Laboratory of Oral Diseases and National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China.,Department of Oral Implantology, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Lin Xiang
- State Key Laboratory of Oral Diseases and National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China.,Department of Oral Implantology, West China Hospital of Stomatology, Sichuan University, Chengdu, China
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9
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Rothe R, Schulze S, Neuber C, Hauser S, Rammelt S, Pietzsch J. Adjuvant drug-assisted bone healing: Part III - Further strategies for local and systemic modulation. Clin Hemorheol Microcirc 2020; 73:439-488. [PMID: 31177207 DOI: 10.3233/ch-199104] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
In this third in a series of reviews on adjuvant drug-assisted bone healing, further approaches aiming at influencing the healing process are discussed. Local and systemic modulation of bone metabolism is pursued with use of a number of drugs with completely different indications, which are characterized by a pleiotropic spectrum of action. These include drugs used to treat lipid disorders (HMG-CoA reductase inhibitors), hypertension (ACE inhibitors), osteoporosis (bisphosphonates), cancer (proteasome inhibitors) and others. Potential applications to enhance bone healing are discussed.
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Affiliation(s)
- Rebecca Rothe
- Department of Radiopharmaceutical and Chemical Biology, Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Institute of Radiopharmaceutical Cancer Research, Dresden, Germany
| | - Sabine Schulze
- University Center of Orthopaedics and Traumatology (OUC), University Hospital Carl Gustav Carus, Dresden, Germany.,Center for Translational Bone, Joint and Soft Tissue Research, University Hospital Carl Gustav Carus and Faculty of Medicine, Technische Universität Dresden, Dresden, Germany
| | - Christin Neuber
- Department of Radiopharmaceutical and Chemical Biology, Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Institute of Radiopharmaceutical Cancer Research, Dresden, Germany
| | - Sandra Hauser
- Department of Radiopharmaceutical and Chemical Biology, Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Institute of Radiopharmaceutical Cancer Research, Dresden, Germany
| | - Stefan Rammelt
- University Center of Orthopaedics and Traumatology (OUC), University Hospital Carl Gustav Carus, Dresden, Germany.,Center for Translational Bone, Joint and Soft Tissue Research, University Hospital Carl Gustav Carus and Faculty of Medicine, Technische Universität Dresden, Dresden, Germany.,Center for Regenerative Therapies Dresden (CRTD), Tatzberg 4, Dresden
| | - Jens Pietzsch
- Department of Radiopharmaceutical and Chemical Biology, Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Institute of Radiopharmaceutical Cancer Research, Dresden, Germany.,Technische Universität Dresden, School of Science, Faculty of Chemistry and Food Chemistry, Dresden, Germany
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10
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Mulinari-Santos G, Santos JSD, Palin LP, Silva ACED, Antoniali C, Faverani LP, Okamoto R. Losartan improves alveolar bone dynamics in normotensive rats but not in hypertensive rats. J Appl Oral Sci 2019; 27:e20180574. [PMID: 31596365 PMCID: PMC6768119 DOI: 10.1590/1678-7757-2018-0574] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2018] [Accepted: 04/09/2019] [Indexed: 12/14/2022] Open
Abstract
Hypertension is one of the main causes of premature death in the world; also, it is associated with several bone alterations. Preclinical studies have demonstrated delayed alveolar bone healing in hypertensive rats. However, losartan has been favorable for consolidation of bone grafts and reduction in active periodontitis. Therefore, losartan is suggested to be effective in bone formation stages, as well as in the synthesis of matrix proteins and mineralization.
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Affiliation(s)
- Gabriel Mulinari-Santos
- Universidade Estadual Paulista - UNESP, Departmento de Cirurgia e Clínica Integrada, Faculdade de Odontologia de Araçatuba, Araçatuba, São Paulo, Brasil
| | - Jaqueline Silva Dos Santos
- Universidade Estadual Paulista - UNESP, Departamento de Ciências Básicas, Faculdade de odontologia de Araçatuba, Araçatuba, São Paulo, Brasil
| | - Letícia Pitol Palin
- Universidade Estadual Paulista - UNESP, Departamento de Ciências Básicas, Faculdade de odontologia de Araçatuba, Araçatuba, São Paulo, Brasil
| | - Ana Cláudia Ervolino da Silva
- Universidade Estadual Paulista - UNESP, Departamento de Ciências Básicas, Faculdade de odontologia de Araçatuba, Araçatuba, São Paulo, Brasil
| | - Cristina Antoniali
- Universidade Estadual Paulista - UNESP, Departamento de Ciências Básicas, Faculdade de odontologia de Araçatuba, Araçatuba, São Paulo, Brasil
| | - Leonardo Perez Faverani
- Universidade Estadual Paulista - UNESP, Departmento de Cirurgia e Clínica Integrada, Faculdade de Odontologia de Araçatuba, Araçatuba, São Paulo, Brasil
| | - Roberta Okamoto
- Universidade Estadual Paulista - UNESP, Departamento de Ciências Básicas, Faculdade de odontologia de Araçatuba, Araçatuba, São Paulo, Brasil.,Affiliated with Research productivity scholarship (Process:306389/2017-7)
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11
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Cano IP, Dionisio TJ, Cestari TM, Calvo AM, Colombini-Ishikiriama BL, Faria FAC, Siqueira WL, Santos CF. Losartan and isoproterenol promote alterations in the local renin-angiotensin system of rat salivary glands. PLoS One 2019; 14:e0217030. [PMID: 31116771 PMCID: PMC6530859 DOI: 10.1371/journal.pone.0217030] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2019] [Accepted: 05/02/2019] [Indexed: 12/18/2022] Open
Abstract
Renin-angiotensin system (RAS) systemically or locally collaborates with tissue homeostasis, growth and development, which has been extensively studied for its pharmacological implications. This study was primarily aimed at finding and characterizing local RAS in rat parotid, sublingual and submandibular glands. It was also hypothesized that vasoactive drugs could affect the expression of RAS targets, as well as saliva flow and its composition. Therefore, another objective of this study was to compare the effects of losartan (angiotensin II receptor blocker) and isoproterenol (β-adrenergic receptor agonist). Forty-one Wistar rats were divided into three groups and administered a daily intraperitoneal dose of saline, losartan or isoproterenol solutions for one week. The following RAS targets were studied using qPCR: renin (REN), angiotensinogen (AGT), angiotensin converting enzyme (ACE), ACE-2, elastase-2 (ELA-2), AT1-a and MAS receptors, using RPL-13 as a reference gene. Morphology of glands was analyzed by immunohistochemistry using REN, ACE, ACE-2, AT1, AT2 and MAS antibodies. The volume and total protein content of saliva were measured. Our results revealed that ACE, ACE-2, AT1-a, AT2 and MAS receptors were expressed in all salivary gland samples, but REN and ELA-2 were absent. Losartan decreased mRNA expression of RAS targets in parotid (MAS) and submandibular glands (ACE and both AT receptors), without affecting morphological alterations, and significantly decreased saliva and total protein secretions. Isoproterenol treatment affected gene expression profiles in parotid (ACE, ACE-2, AT1-a, MAS, AGT), and submandibular (ACE, AT2, AGT) glands, thus promoting acinar hypertrophy in serous acini, without significant changes in salivary flow or total protein content. These drugs affected mainly acini, followed by duct systems and myoepithelial cells, whereas blood vessels were not affected. In conclusion, there is a local RAS in major rat salivary glands and losartan, an angiotensin II receptor blocker, affected not only the RAS-target gene expression but also decreased salivary flow and total protein content.
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Affiliation(s)
- Isadora Prado Cano
- Department of Prosthodontics and Periodontology, Bauru School of Dentistry, University of São Paulo, Bauru, São Paulo, Brazil
| | - Thiago José Dionisio
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo, Bauru, São Paulo, Brazil
| | - Tânia Mary Cestari
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo, Bauru, São Paulo, Brazil
| | - Adriana Maria Calvo
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo, Bauru, São Paulo, Brazil
| | | | - Flávio Augusto Cardoso Faria
- Department of Biochemistry and School of Dentistry, Schulich School of Medicine & Dentistry, The University of Western Ontario, London, Canada
| | - Walter Luiz Siqueira
- Department of Biochemistry and School of Dentistry, Schulich School of Medicine & Dentistry, The University of Western Ontario, London, Canada
| | - Carlos Ferreira Santos
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo, Bauru, São Paulo, Brazil
- * E-mail:
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