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Orthodontic treatment in periodontally compromised patients: a systematic review. Clin Oral Investig 2023; 27:79-89. [PMID: 36502508 PMCID: PMC9877066 DOI: 10.1007/s00784-022-04822-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Accepted: 11/29/2022] [Indexed: 12/14/2022]
Abstract
OBJECTIVES The aim of this systematic review was to examine the literature on aggressive and chronic periodontitis and orthodontics to clarify the therapy-relevant aspects of orthodontic treatment with altered biomechanics in periodontally compromised dentition. MATERIALS AND METHODS Literature searches were conducted in the electronic databases "PubMed" and "DIMDI" using the keywords "aggressive periodontitis AND ortho*," "aggressive periodontitis AND orthodontics," "chronic periodontitis AND ortho*," and "chronic periodontitis AND orthodontics" for the publication period from January 1990 to July 2022. In addition, a manual search was carried out in the selected trade journals "Community Dental Health," "European Journal of Oral Sciences," and "Parodontologie." Human clinical trials were included, whereas animal experimental studies, case reports, and reviews were generally excluded. The appropriate studies were selected, and the relevant data was tabulated according to different parameters, regarding the study design, the study structure, and the conduct of the study. RESULTS A total of 1067 articles were found in the preliminary electronic search. The manual search and review of all related bibliographies resulted in an additional 1591 hits. After the first screening, 43 articles were classified as potentially relevant and reviewed in their original form. After the suitability test, 5 studies with a total of 366 participants were included in the final evaluation. These included one randomized controlled trial and four low-evidence intervention studies. The studies were conducted in two university hospitals and three private practices. All participants underwent scaling and root plaining and periodontal surgery before the orthodontic treatment started. Mean probing pocket depth reduction before and after the interdisciplinary treatment was analyzed in all the included studies; mean difference in clinical attachment level in four of the studies was also included. All participants were enrolled in a continuous recall system. In all studies, orthodontic therapy in periodontally compromised patients improved function and esthetics, resulting in lower probing depths and clinical attachment gains. CONCLUSIONS Orthodontic treatment can be used for patients with reduced periodontal support to stabilize clinical findings and improve function and esthetics. The prerequisite for this is a profound knowledge of altered biomechanics and an adapted interdisciplinary treatment approach. Due to the large heterogeneity of the included studies and their limited methodological quality, the results obtained in this review must be considered critically. Further randomized controlled long-term studies with comparable study designs are necessary to obtain reliable and reproducible treatment results. CLINICAL RELEVANCE Patients with periodontal impairment can be successfully treated with orthodontics as part of interdisciplinary therapy. Orthodontic treatment has no negative impact on the periodontium; if minimal, controlled forces are used under non-inflammatory conditions.
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Martinelli F, Diaz AB, Afonso RH, Araújo MTDS. Collagen membrane and distraction osteogenesis for correcting alveolar bone defects: An animal pilot study. J World Fed Orthod 2022; 11:130-135. [DOI: 10.1016/j.ejwf.2022.05.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Revised: 05/14/2022] [Accepted: 05/14/2022] [Indexed: 11/30/2022]
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Ahmed Ali MA, Mostafa D. Histological Evaluation of Guided Bone Regeneration in Osseous Defects Using A Novel Non-Resorbable Membrane. Open Access Maced J Med Sci 2022. [DOI: 10.3889/oamjms.2022.8262] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
BACKGROUND: Guided bone regeneration and guided tissue regeneration procedures have been performed using barrier membranes in clinical dentistry to enhance bone formation in osseous defects, ridge preservation and reconstruction. Despite the considerable number of new biomaterials that develop with more advantages and fewer disadvantages for bone regeneration, the cost and surgical approach difficulties are still the main obstacles that we tried to overcome using the novel membrane.
AIM: Our research aimed to assess histologically the bone formation using the novel membrane in experimental bone defects.
MATERIAL AND METHODS: Our study was conducted on ten mongrel dogs. Each animal presented two groups. The first group was at the left side of the animal mandible which received Bio-Oss only while the right side received Bio-Oss and was covered by the novel non-resorbable membrane. These dogs were sacrificed (3, 6, 9 and 12 weeks) postoperatively for histological assessment of healing and bone formation of osseous defects.
RESULTS: The histological evaluation showed that the formation of new bone in group I (Bio-OSS only) was less in amount as compared with group II (Bio-Oss with the novel non-resorbable membrane).
CONCLUSION: The present clinical findings revealed that the novel non-resorbable membrane was inert and induced no inflammatory reaction or graft rejection. The study provided histological evidence of new bone formation in close contact with host bone due to osteoconductivity of Bio-Oss and cell occlussiveness of the membrane.
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Lu J, Wang Z, Zhang H, Xu W, Zhang C, Yang Y, Zheng X, Xu J. Bone Graft Materials for Alveolar Bone Defects in Orthodontic Tooth Movement. TISSUE ENGINEERING PART B-REVIEWS 2021; 28:35-51. [PMID: 33307972 DOI: 10.1089/ten.teb.2020.0212] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Clinically, orthodontic tooth movement (OTM) across the narrow alveolar ridge area inevitably entails some adverse reactions such as limited movement and periodontal tissue damage. Hence, it is essential to reconstruct the morphology of the alveolar crest before the tooth movement. Unlike the routine reconstruction of alveolar ridge in the field of implant, the orthodontic practices are distinctive, which require dental movement across the constructed alveolar ridge with safety and stability. Herein, we addressed the pros and cons of reconstruction of the defected orthodontic alveolar ridge with different bone graft materials. Attention is also paid to other factors such as the postgraft initiation time of OTM that can substantially influence the bone reconstruction and tooth movement effect. Rather, considering the lack of a unified standard in orthodontic clinics related to bone reconstruction for OTM, we provide some recommendations and guidance for OTM through alveolar ridge defect area.
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Affiliation(s)
- Jiajia Lu
- Key Lab. of Oral Diseases Research of Anhui Province, Stomatological Hospital and College, Anhui Medical University, Hefei, China
| | - Zishuo Wang
- School of Stomatology, Tongji University, Shanghai, China
| | - Hongyan Zhang
- Key Lab. of Oral Diseases Research of Anhui Province, Stomatological Hospital and College, Anhui Medical University, Hefei, China
| | - Wenhua Xu
- Key Lab. of Oral Diseases Research of Anhui Province, Stomatological Hospital and College, Anhui Medical University, Hefei, China
| | - Chengfei Zhang
- Faculty of Dentistry, The University of Hong Kong, Pokfulam, Hong Kong, China
| | - Yanqi Yang
- Faculty of Dentistry, The University of Hong Kong, Pokfulam, Hong Kong, China
| | - Xianyu Zheng
- Key Lab. of Oral Diseases Research of Anhui Province, Stomatological Hospital and College, Anhui Medical University, Hefei, China
| | - Jianguang Xu
- Key Lab. of Oral Diseases Research of Anhui Province, Stomatological Hospital and College, Anhui Medical University, Hefei, China
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Saga AY, Parra AXG, Silva IC, Dória C, Camargo ES. Orthodontic treatment with passive eruption and mesialization of semi-impacted mandibular third molar in an adult with multiple dental losses. Dental Press J Orthod 2019; 24:36-47. [PMID: 31994645 PMCID: PMC6986187 DOI: 10.1590/2177-6709.24.6.036-047.oar] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2018] [Accepted: 08/15/2019] [Indexed: 12/03/2022] Open
Abstract
Objective: This article describes the orthodontic treatment performed on an adult patient with multiple dental losses. Case report: A female patient, 20 years and 4 months old, presented with the following conditions: absence of teeth #26, #35, #36 and #46; semi-impacted tooth #48; inclined molars adjacent to an edentulous space; canines and premolars in a Class II relationship; a convex profile; biprotrusion; and forced lip sealing. Results: Space in the region of tooth #26 was closed, as well the space of tooth #46; tooth #48 erupted and followed mesial movement passively; space of the region of tooth #35 was maintained for the placement of a dental implant; uprighting of tooth #37 was obtained. Aesthetic and functional goals of the treatment were achieved. Results remained stable 10 years after the end of the treatment. Conclusion: The modified helical loop could be effectively used in orthodontic mechanics to close edentulous spaces. Passive semi-impacted mandibular third molar eruption and mesialization can occur in adults when proper space is provided.
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Affiliation(s)
- Armando Yukio Saga
- Pontifícia Universidade Católica do Paraná, Escola de Ciências da Vida (Curitiba/PR, Brazil)
| | - Ariane Ximenes Graciano Parra
- Pontifícia Universidade Católica do Paraná, Escola de Ciências da Vida, Programa de Pós-Graduação em Odontologia (Curitiba/PR, Brazil)
| | - Isteicy Cortêz Silva
- Pontifícia Universidade Católica do Paraná, Escola de Ciências da Vida, Graduação em Odontologia (Curitiba/PR, Brazil)
| | - Cayana Dória
- Pontifícia Universidade Católica do Paraná, Escola de Ciências da Vida, Programa de Pós-Graduação em Odontologia (Curitiba/PR, Brazil)
| | - Elisa Souza Camargo
- Pontifícia Universidade Católica do Paraná, Escola de Ciências da Vida, Programa de Pós-Graduação em Odontologia (Curitiba/PR, Brazil)
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Envisioning Post-treatment Occlusions after Space Closure Using Temporary Skeletal Anchorage Devices. J Clin Pediatr Dent 2019; 43:131-136. [PMID: 30730802 DOI: 10.17796/1053-4625-43.2.11] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Missing posterior teeth and posterior tooth extractions are commonly seen and needed within orthodontic practices. With the invention of temporary skeletal anchorage devices (TSADs), clinicians can now effectively close posterior tooth spaces. Various molar occlusions are discussed to help clinicians envision post-treatment occlusions after posterior teeth space closure using TSADs.
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Design of a biodegradable UV-irradiated gelatin-chitosan/nanocomposed membrane with osteogenic ability for application in bone regeneration. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 99:875-886. [DOI: 10.1016/j.msec.2019.01.135] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2018] [Revised: 01/09/2019] [Accepted: 01/31/2019] [Indexed: 12/27/2022]
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Baek YJ, Kim JH, Song JM, Yoon SY, Kim HS, Shin SH. Chitin-fibroin-hydroxyapatite membrane for guided bone regeneration: micro-computed tomography evaluation in a rat model. Maxillofac Plast Reconstr Surg 2016; 38:14. [PMID: 27069912 PMCID: PMC4803803 DOI: 10.1186/s40902-016-0060-6] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2015] [Accepted: 03/04/2016] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND In guided bone regeneration (GBR) technique, many materials have been used for improving biological effectiveness by adding on membranes. The new membrane which was constructed with chitin-fibroin-hydroxyapatite (CNF/HAP) was compared with a collagen membrane (Bio-Gide®) by means of micro-computed tomography. METHODS Fifty-four rats were used in this study. A critical-sized (8 mm) bony defect was created in the calvaria with a trephine bur. The CNF/HAP membrane was prepared by thermally induced phase separation. In the experimental group (n = 18), the CNF/HAP membrane was used to cover the bony defect, and in the control group (n = 18), a resorbable collagen membrane (Bio-Gide®) was used. In the negative control group (n = 18), no membrane was used. In each group, six animals were euthanized at 2, 4, and 8 weeks after surgery. The specimens were analyzed using micro-CT. RESULTS Bone volume (BV) and bone mineral density (BMD) of the new bone showed significant difference between the negative control group and membrane groups (P < 0.05). However, between two membranes, the difference was not significant. CONCLUSIONS The CNF/HAP membrane has significant effect on the new bone formation and has the potential to be applied for guided bone regeneration.
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Affiliation(s)
- Young-Jae Baek
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Pusan National University, Mulgeum-eup, Yangsan, 50612 Republic of Korea
| | - Jung-Han Kim
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Pusan National University, Mulgeum-eup, Yangsan, 50612 Republic of Korea
| | - Jae-Min Song
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Pusan National University, Mulgeum-eup, Yangsan, 50612 Republic of Korea
| | - Sang-Yong Yoon
- Department of Oral and Maxillofacial Surgery, Good Gang-An Hospital, Busan, 48256 Republic of Korea
| | - Hong-Sung Kim
- Department of Biomaterials Science, College of Natural Resources and Life Science, Pusan National University, Miryang, 50463 Republic of Korea
| | - Sang-Hun Shin
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Pusan National University, Mulgeum-eup, Yangsan, 50612 Republic of Korea
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Song JM, Shin SH, Kim YD, Lee JY, Baek YJ, Yoon SY, Kim HS. Comparative study of chitosan/fibroin-hydroxyapatite and collagen membranes for guided bone regeneration in rat calvarial defects: micro-computed tomography analysis. Int J Oral Sci 2014; 6:87-93. [PMID: 24722582 PMCID: PMC5130055 DOI: 10.1038/ijos.2014.16] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/26/2014] [Indexed: 11/08/2022] Open
Abstract
This study aimed to utilize micro-computed tomography (micro-CT) analysis to compare new bone formation in rat calvarial defects using chitosan/fibroin-hydroxyapatite (CFB-HAP) or collagen (Bio-Gide) membranes. Fifty-four (54) rats were studied. A circular bony defect (8 mm diameter) was formed in the centre of the calvaria using a trephine bur. The CFB-HAP membrane was prepared by thermally induced phase separation. In the experimental group (n=18), the CFB-HAP membrane was used to cover the bony defect, and in the control group (n=18), a resorbable collagen membrane (Bio-Gide) was used. In the negative control group (n=18), no membrane was used. In each group, six animals were euthanized at 2, 4 and 8 weeks after surgery. The specimens were then analysed using micro-CT. There were significant differences in bone volume (BV) and bone mineral density (BMD) (P<0.05) between the negative control group and the membrane groups. However, there were no significant differences between the CFB-HAP group and the collagen group. We concluded that the CFB-HAP membrane has significant potential as a guided bone regeneration (GBR) membrane.
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Affiliation(s)
- Jae Min Song
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Pusan National University, Yangsan, Korea
| | - Sang Hun Shin
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Pusan National University, Yangsan, Korea
| | - Yong Deok Kim
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Pusan National University, Yangsan, Korea
| | - Jae Yeol Lee
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Pusan National University, Yangsan, Korea
| | - Young Jae Baek
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Pusan National University, Yangsan, Korea
| | - Sang Yong Yoon
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Pusan National University, Yangsan, Korea
| | - Hong Sung Kim
- Department of Biomaterial Science, Pusan National University, Miryang, Korea
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Cherian BM, Leão AL, de Souza SF, de Olyveira GM, Costa LMM, Brandão CVS, Narine SS. Bacterial Nanocellulose for Medical Implants. ADVANCES IN NATURAL POLYMERS 2013. [DOI: 10.1007/978-3-642-20940-6_10] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Corbacho de Melo MM, Cardoso MG, Faber J, Sobral A. Risk factors for periodontal changes in adult patients with banded second molars during orthodontic treatment. Angle Orthod 2012; 82:224-228. [PMID: 21899378 PMCID: PMC8867934 DOI: 10.2319/030911-172.1] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2011] [Accepted: 07/01/2011] [Indexed: 01/22/2024] Open
Abstract
OBJECTIVE To identify the risk factors for periodontal changes in adult patients during orthodontic treatment by evaluating the periodontal status of banded second molars using the gingival index (GI). MATERIAL AND METHODS The sample consisted of 100 adult patients divided into two groups: the Orthodontics group, undergoing corrective treatment with fixed appliances and bands cemented to the four second molars, and the Control group, with no prior history of orthodontic treatment, age and sex matched. Group GI values were compared using the Wilcoxon test. Additionally, a multivariate logistic regression was performed to study the risk factors for increases in the GI. RESULTS Individuals in the Orthodontics group showed a significantly higher GI than those in the Control group. Logistic regression revealed that among the risk factors found to increase GI, the following proved significant (in order of importance): plaque index, subgingival encroachment of the cervical margins of bands, probing depth, and length of orthodontic treatment. CONCLUSIONS Banded second molars of adult patients during orthodontic treatment showed more clinical signs of gingival inflammation than those of untreated individuals. Moreover, major risk factors identified included the presence of plaque and the presence of subgingival band margins.
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Abstract
O tratamento ortodôntico com extração de molares em pacientes adultos é tecnicamente mais complexo, devido a inúmeros fatores. Em geral, o espaço a ser fechado é maior do que o espaço dos pré-molares e, por isso, a ancoragem é crítica e o tempo de tratamento mais longo. É comum esses casos apresentarem algum grau de comprometimento periodontal por causa da idade dos pacientes e, portanto, necessitam de maior controle da mecânica ortodôntica para reduzir os efeitos colaterais do fechamento do espaço. Por isso, bons resultados de finalização são mais difíceis de ser alcançados. Sendo assim, este artigo tem como objetivo apresentar as razões para a indicação de extração de molares nos tratamentos ortodônticos, as contraindicações, as diferentes fases da mecânica ortodôntica, esclarecer os fatores envolvidos nesse tipo de planejamento e tratamento e apresentar casos clínicos tratados com extração de molares.
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Saga AY, Maruo IT, Maruo H, Guariza Filho O, Camargo ES, Tanaka OM. Treatment of an adult with several missing teeth and atrophic old mandibular first molar extraction sites. Am J Orthod Dentofacial Orthop 2011; 140:869-78. [DOI: 10.1016/j.ajodo.2010.06.027] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2009] [Revised: 06/01/2010] [Accepted: 06/01/2010] [Indexed: 10/14/2022]
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Jensen OT, Ringeman JL, Cottam JR, Casap N. Orthognathic and osteoperiosteal flap augmentation strategies for maxillary dental implant reconstruction. Dent Clin North Am 2011; 55:813-846. [PMID: 21933734 DOI: 10.1016/j.cden.2011.07.011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
In this article, five variations in orthognathic surgery procedures used to gain bone mass for implants are discussed: Le Fort I downgrafting, Le Fort I distraction, sub-Le Fort I interpositional sandwich grafting, segmental sandwich grafting, and the island osteoperiosteal flap approach.
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Affiliation(s)
- Ole T Jensen
- Implant Dentistry Associates of Colorado, 8200 East Belleview Avenue, Suite 520E, Greenwood Village, CO 80111, USA.
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Jensen OT, Ringeman JL, Cottam JR, Casap N. Orthognathic and Osteoperiosteal Flap Augmentation Strategies for Maxillary Dental Implant Reconstruction. Oral Maxillofac Surg Clin North Am 2011; 23:301-19, vi. [PMID: 21492803 DOI: 10.1016/j.coms.2011.01.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Preparation and characterization of nanofibrous membranes of poly(D,L-lactic acid)/chitin blend for guided tissue regenerative barrier. Macromol Res 2009. [DOI: 10.1007/bf03218928] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Iamaguti LS, Brandão CV, Pellizzon CH, Ranzani JJ, Minto BW. Análises histológica e morfométrica do uso de membrana biossintética de celulose em trocleoplastia experimental de cães. PESQUISA VETERINARIA BRASILEIRA 2008. [DOI: 10.1590/s0100-736x2008000400001] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
O objetivo deste trabalho foi avaliar a aplicação de membrana biossintética de celulose, de fabricação nacional, após a realização da trocleoplastia experimental, com intuito de verificar se o uso desta poderia favorecer a migração de células com potencial condrogênico. Foram utilizados 12 cães adultos, de ambos os sexos, sadios e sem alterações no aparelho locomotor. Os animais foram submetidos ao procedimento de trocleoplastia em ambos os membros pélvicos, após tranquilização e anestesia epidural. Na trocleoplastia do membro esquerdo foi aplicada membrana biossintética à base de celulose (grupo tratado, GT), fixada à cartilagem por meio de pontos simples separados com Poliglactina 910 6-0; no membro direito, foi realizada apenas a trocleoplastia, constituindo o grupo controle (GC). Os animais foram subdivididos em quatro subgrupos de acordo com o período final de avaliação aos 15, 30, 60 e 90 dias do pós-operatório. Após artrotomia exploratória nos momentos pré-estabelecidos, foi realizada biópsia da região da trocleoplastia para avaliação histológica e morfométrica do tecido de reparação. Aos 30 e 60 dias do pós-operatório, notou-se a presença de maior número de células semelhantes a condrócitos nas lesões tratadas com celulose em relação ao membro contra-lateral, apesar do aspecto imaturo. Aos 90 dias, o tecido de reparação era do tipo fibrocartilaginoso maduro, não havendo diferenças entre os dois grupos. No GC houve aumento progressivo do número de células até o período final de avaliação. Por outro lado no grupo tratado verificou-se que, em relação ao período inicial (15 dias), houve aumento do número de células até os 60 dias, com subseqüente retorno aos valores iniciais aos 90 dias. Dos 15 aos 60 dias o número de células foi maior no GT em relação ao GC. Inicialmente, o tecido de reparação neoformado foi mais espesso no grupo tratado. Dessa forma, conclui-se que a membrana de celulose acelerou o processo de reparação tecidual inicial da região da trocleoplastia, apresentando boa integração do tecido neoformado com a cartilagem adjacente.
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Oltramari PVP, de Lima Navarro R, Henriques JFC, Taga R, Cestari TM, Janson G, Granjeiro JM. Evaluation of bone height and bone density after tooth extraction: an experimental study in minipigs. ACTA ACUST UNITED AC 2007; 104:e9-16. [DOI: 10.1016/j.tripleo.2007.06.015] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2006] [Revised: 06/06/2007] [Accepted: 06/21/2007] [Indexed: 11/26/2022]
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Oltramari PVP, de Lima Navarro R, Henriques JFC, Taga R, Cestari TM, Ceolin DS, Janson G, Granjeiro JM. Orthodontic movement in bone defects filled with xenogenic graft: An experimental study in minipigs. Am J Orthod Dentofacial Orthop 2007; 131:302.e10-7. [PMID: 17346582 DOI: 10.1016/j.ajodo.2006.07.020] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2006] [Revised: 07/01/2006] [Accepted: 07/01/2006] [Indexed: 10/23/2022]
Abstract
INTRODUCTION In this study, we investigated whether it is possible to orthodontically move a tooth into an adjacent bone defect previously filled with xenogenic grafting material, with emphasis on the reactions of the tooth roots and adjacent tissues. METHODS Six minipigs were used. In each animal, 4 defects were created at the mesial aspects of the maxillary and mandibular first permanent molars; the defects on the right were filled with the xenograft (test side), and the opposite defects (control side) were filled with blood clots and allowed to heal spontaneously. Three months later, orthodontic appliances were placed in each quadrant to allow mesial bodily movement of the first permanent molars. When the teeth were moved about halfway into the defect spaces, the animals were killed, and the areas of interest were harvested. The mesial roots of the first molars and adjacent tissues were histologically and morphometrically evaluated. The volume density of bone tissue, the percentage of root resorption, and the bone height were evaluated with image analysis software. RESULTS Data analysis showed that (1) the percentage of root resorption was smaller (P = .0359) for the test group (4.16%) compared with the control (6.52%); (2) there was no statistically significant differences between groups concerning the volume density of neoformed bone (P >.05); (3) the bovine bone matrix was almost totally replaced by structured bone tissue; (4) the test group had a statistically significant smaller bone height loss (2.18 mm, P = .0018) than the control group (3.26 mm). CONCLUSIONS Based on these results, it was concluded that teeth can be moved into areas of bone defects previously filled with xenograft.
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Taner TU, Germec D, Er N, Tulunoglu I. Interdisciplinary treatment of an adult patient with old extraction sites. Angle Orthod 2006; 76:1066-73. [PMID: 17090160 DOI: 10.2319/082505-301] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2005] [Accepted: 12/01/2005] [Indexed: 11/23/2022] Open
Abstract
This case report describes the interdisciplinary treatment of a 31-year-old female patient showing a protrusive profile, maxillary constriction, mandibular crowding, a Class III canine relationship complicated with multiple missing teeth, old atrophic extraction sites, and periodontal defects. The lower dental arch irregularity was eliminated by air-rotor stripping (ARS). The upper extraction site was opened for prosthetic rehabilitation, whereas closure of the lower extraction space was preferred. The narrow alveolar crest of the atrophic bone was augmented with the use of autogenous bone, beta-tricalcium phosphate (Cerasorb), and autogenous platelet-rich plasma. A functional and esthetic occlusion in an improved facial profile was established at the end of orthodontic treatment combined with ARS technique, surgery, and prosthodontics.
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Affiliation(s)
- Tülin Ugur Taner
- Department of Orthodontics, Hacettepe University Faculty of Dentistry, Ankara, Turkey.
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Chen FM, Zhao YM, Wu H, Deng ZH, Wang QT, Zhou W, Liu Q, Dong GY, Li K, Wu ZF, Jin Y. Enhancement of periodontal tissue regeneration by locally controlled delivery of insulin-like growth factor-I from dextran–co-gelatin microspheres. J Control Release 2006; 114:209-22. [PMID: 16859799 DOI: 10.1016/j.jconrel.2006.05.014] [Citation(s) in RCA: 78] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2006] [Revised: 05/15/2006] [Accepted: 05/17/2006] [Indexed: 12/31/2022]
Abstract
The present work focused on the design of novel hydrogel microspheres based on both dextran- and gelatin-derived biomaterials, and discussed whether locally controlled delivery of IGF-I from dextran-co-gelatin hydrogel microspheres (DG-MP) was useful for periodontal regeneration enhancement. Microspheres were synthesized when gelatin was cooperating with glycidyl methacrylate (GMA) derivatized dextrans (Dex-GMA) and the resultant DG-MP with a hydrogel character of which the cross-linking density could be controlled by the degree of substitution (DS, the number of methacrylates per 100 glucopyranose residues) of Dex-GMA. In this study, three types of DG-MP (DG-MP4.7, DG-MP6.3 and DG-MP7.8) obtained from gelatin and Dex-GMA (differing in DS: 4.7, 6.3 and 7.8 respectively) were prepared and characterized by swelling and degradation properties, drug release kinetics and biological capability in promoting tissue regeneration. By swelling in aqueous positively charged IGF-I solutions, the protein could be encapsulated in DG-MP by polyionic complexation with negatively charged acidic gelatin. No obvious influence of Dex-GMA's DS on DG-MP's configuration and size was observed, and the release and degraded properties showed no significant difference between three types of DG-MP in PBS buffer either. However, high DS of Dex-GMA could lower microsphere's swelling, prolong its degraded time and minimize IGF-I burst release markedly in dextranase-containing PBS, where IGF-I release from a slow release type of microspheres (DG-MP7.8) could be maintained more than 28 days, and an effective protein release kinetics without a significant burst but a relevantly constant release after the initial burst was achieved. IGF-I in DG-MP resulted in more new bone formation in the periodontal defects within 4 or 8 weeks than IGF-I in blood clot directly did (P < 0.01). The observed newly formation of periodontal tissues including the height and percentage of new bone and new cementum on the denuded root surfaces of the furcation area in DG-MP7.8 group were more than that in other groups (P < 0.05). The adequate width of regenerative periodontal ligament (PDL), regular Sharpey's fibers and alveolar bone reconstruction could be observed only in DG-MP7.8 group. These combined results demonstrate that effective release kinetics can be realized by adjusting the DS of Dex-GMA and followed cross-linking density of DG-MP, and that locally controlled delivery of IGF-I from slow release type of DG-MP may serve as a novel therapeutic strategy for periodontal tissue regeneration.
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Affiliation(s)
- Fa-ming Chen
- Department of Periodontology and Oral Medicine, College of Stomatology, Fourth Military Medical University, 145th Chang-le Road, Xi'an 710032, Shaanxi, China.
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