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[PMID]:29294185
[Au] Autor:Gomes V; Carretero MA; Kaliontzopoulou A
[Ad] Endereço:CIBIO Research Centre in Biodiversity and Genetic Resources, InBIO, Universidade do Porto, Campus de Vairão, Rua Padre Armando Quintas, N° 7, 4485-661, Vairao, Vila do Conde, Portugal. veronica.a.s.g@gmail.com.
[Ti] Título:Run for your life, but bite for your rights? How interactions between natural and sexual selection shape functional morphology across habitats.
[So] Source:Naturwissenschaften;105(1-2):9, 2018 Jan 02.
[Is] ISSN:1432-1904
[Cp] País de publicação:Germany
[La] Idioma:eng
[Ab] Resumo:A central issue in evolutionary biology is how morphology, performance, and habitat use coevolve. If morphological variation is tightly associated with habitat use, then differences in morphology should affect fitness through their effect on performance within specific habitats. In this study, we investigate how evolutionary forces mold morphological traits and performance differently given the surrounding environment, at the intraspecific level. For this purpose, we selected populations of the lizard Podarcis bocagei from two different habitat types, agricultural walls and dunes, which we expected to reflect saxicolous vs ground-dwelling habits. In the laboratory, we recorded morphological traits as well as performance traits by measuring sprint speed, climbing capacity, maneuverability, and bite force. Our results revealed fast-evolving ecomorphological variation among populations of P. bocagei, where a direct association existed between head morphology and bite performance. However, we could not establish links between limb morphology and locomotor performance at the individual level. Lizards from walls were better climbers than those from dunes, suggesting a very fast evolutionary response. Interestingly, a significant interaction between habitat and sex was detected in climbing performance. In addition, lizards from dunes bit harder than those from walls, although sexual differentiation was definitely the main factor driving variation in head functional morphology. Taking into account all the results, we found a complex interaction between natural and sexual selection on whole-organism performance, which are, in some cases, reflected in morphological variation.
[Mh] Termos MeSH primário: Ecossistema
Lagartos/anatomia & histologia
Lagartos/fisiologia
Preferência de Acasalamento Animal
Seleção Genética
[Mh] Termos MeSH secundário: Animais
Força de Mordida
Lagartos/classificação
Velocidade de Caminhada
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180302
[Lr] Data última revisão:
180302
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180103
[St] Status:MEDLINE
[do] DOI:10.1007/s00114-017-1537-6


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[PMID]:29304177
[Au] Autor:Ikebe K; Gondo Y; Kamide K; Masui Y; Ishizaki T; Arai Y; Inagaki H; Nakagawa T; Kabayama M; Ryuno H; Okubo H; Takeshita H; Inomata C; Kurushima Y; Mihara Y; Hatta K; Fukutake M; Enoki K; Ogawa T; Matsuda KI; Sugimoto K; Oguro R; Takami Y; Itoh N; Takeya Y; Yamamoto K; Rakugi H; Murakami S; Kitamura M; Maeda Y
[Ad] Endereço:Department of Prosthodontics, Gerodontology and Oral Rehabilitation, Osaka University Graduate School of Dentistry, Osaka, Japan.
[Ti] Título:Occlusal force is correlated with cognitive function directly as well as indirectly via food intake in community-dwelling older Japanese: From the SONIC study.
[So] Source:PLoS One;13(1):e0190741, 2018.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:BACKGROUND: Growing evidence suggests that oral health may be an important factor associated with cognitive function in aged populations. However, many previous studies on this topic used insensitive oral indicators or did not include certain essential covariates. Thus, we examined the association between occlusal force and cognitive function in a large sample of older adults, controlling for dietary intake, vascular risk factors, inflammatory biomarkers, depression, and genetic factors. METHODS: In this cross-sectional study of older community-dwelling Japanese adults, we examined data collected from 994 persons aged 70 years and 968 persons aged 80 years. Cognitive function was measured using the Japanese version of the Montreal Cognitive Assessment (MoCA-J). Oral status and function were evaluated according to the number of remaining teeth, periodontal pocket depth, and maximal occlusal force. Associations between MoCA-J scores and occlusal force were investigated via bivariate and multivariate analyses. RESULTS: Education level, financial status, depression score, and intake of green and yellow vegetables, as well as number of teeth and occlusal force, were significantly correlated with MoCA-J scores in both age groups. Among individuals aged 80 years, CRP and periodontal status were weakly but significantly associated with MoCA-J score. After controlling for all significant variables via bivariate analyses, the correlation between maximal occlusal force and cognitive function persisted. A path analysis confirmed the hypothesis that cognitive function is associated with occlusal force directly as well as indirectly via food intake. CONCLUSIONS: After controlling for possible factors, maximal occlusal force was positively associated with cognitive function directly as well as indirectly through dietary intake.
[Mh] Termos MeSH primário: Força de Mordida
Cognição
Ingestão de Alimentos
[Mh] Termos MeSH secundário: Idoso
Idoso de 80 Anos ou mais
Apolipoproteína E4/genética
Estudos Transversais
Depressão/fisiopatologia
Diabetes Mellitus/fisiopatologia
Diabetes Mellitus/psicologia
Dieta
Feminino
Seres Humanos
Hipertensão/fisiopatologia
Hipertensão/psicologia
Vida Independente
Japão
Masculino
Saúde Bucal
Estudos Prospectivos
Fatores Socioeconômicos
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Apolipoprotein E4)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180210
[Lr] Data última revisão:
180210
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180106
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0190741


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[PMID]:29173856
[Au] Autor:Varga S; Spalj S; Anic Milosevic S; Lapter Varga M; Mestrovic S; Trinajstic Zrinski M; Slaj M
[Ad] Endereço:Department of Orthodontics, School of Medicine, University of Split, Split, Croatia.
[Ti] Título:Changes of bite force and occlusal contacts in the retention phase of orthodontic treatment: A controlled clinical trial.
[So] Source:Am J Orthod Dentofacial Orthop;152(6):767-777, 2017 Dec.
[Is] ISSN:1097-6752
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:INTRODUCTION: We aimed to determine whether appliance type affects changes in maximum voluntary bite force (MVBF) and the number of occlusal contacts (NOC) during retention, controlling for sex, age, and body mass index. METHODS: The sample comprised 176 examinees (70 male, 106 female) aged 14 to 20 years: 30 had maxillary and mandibular Essix retainers, 30 had wrap-around retainers, and 30 had a combination of fixed mandibular canine-to-canine retainers bonded on each tooth separately (double twisted, 0.254 mm in diameter, stainless steel ligature wire) and Essix retainer in the maxillary arch; 86 with normal occlusion were not treated. MVBF and the NOC were measured immediately after removal of preadjusted edgewise appliances (Roth prescription), 6 weeks after that, and after the next 4 weeks. RESULTS: Increases in MVBF and the NOC were demonstrated, but subjects with 2 Essix retainers showed lower values than did the others. Changes were related to type of appliance, sex, and age (P <0.05) but not to body mass index. The increase in NOC occurred faster than the increase of MVBF, more and sooner with the wrap-around retainer and in male subjects than with the Essix and in female subjects. MVBF and NOC nearly reached the values of the control subjects. CONCLUSIONS: Settling of the occlusion depends on appliance type: it takes longer in female patients and with Essix in both dental arches than with the other tested appliances.
[Mh] Termos MeSH primário: Força de Mordida
Oclusão Dentária
Contenções Ortodônticas
[Mh] Termos MeSH secundário: Adolescente
Feminino
Seres Humanos
Masculino
Estudos Prospectivos
Adulto Jovem
[Pt] Tipo de publicação:JOURNAL ARTICLE; RANDOMIZED CONTROLLED TRIAL
[Em] Mês de entrada:1712
[Cu] Atualização por classe:171211
[Lr] Data última revisão:
171211
[Sb] Subgrupo de revista:D; IM
[Da] Data de entrada para processamento:171128
[St] Status:MEDLINE


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[PMID]:28869633
[Au] Autor:Roy S; DAS M; Chakraborty P; Biswas JK; Chatterjee S; Khutia N; Saha S; Chowdhury AR
[Ad] Endereço:Department of Aerospace Engineering and Applied Mechanics, Indian Institute of Engineering Science and Technology, Shibpur, India.
[Ti] Título:Optimal selection of dental implant for different bone conditions based on the mechanical response.
[So] Source:Acta Bioeng Biomech;19(2):11-20, 2017.
[Is] ISSN:1509-409X
[Cp] País de publicação:Poland
[La] Idioma:eng
[Ab] Resumo:PURPOSE: Bone quality varies from one patient to another extensively. Young's modulus may deviate up to 40% of normal bone quality, which results into alteration of bone stiffness immensely. The prime goal of this study is to design the optimum dental implant considering the mechanical response at bone implant interfaces for a patient with specific bone quality. METHOD: 3D models of mandible and natural molar tooth were prepared from CT scan data, while dental implants were modelled using different diameter, length and porosity and FE analysis was carried out. Based on the variation in bone density, five different bone qualities were considered. First, failure analysis of implants, under maximum biting force of 250 N had been performed. Next, the implants that remained were selected for observation of mechanical response at bone implant interfaces under common chewing load of 120 N. RESULT: Maximum Von Mises stress did not surpass the yield strength of the implant material (TiAl4V). However, factor of safety of 1.5 was considered and all but two dental implants survived the design stress or allowable stress. Under 120 N load, distribution of Von Mises stress and strain at the boneimplant interface corresponding to the rest of the implants for five bone conditions were obtained and enlisted. CONCLUSION: Implants exhibiting interface strain within 1500-3000 microstrain range show the best bone remodelling and osseointegration. So, implant models having this range of interface strains were selected corresponding to the particular bone quality. A set of optimum dental implants for each of the bone qualities were predicted.
[Mh] Termos MeSH primário: Implantes Dentários
Análise do Estresse Dentário/métodos
Modelos Biológicos
Dente Molar/fisiologia
Dente Molar/cirurgia
Desenho de Prótese/métodos
[Mh] Termos MeSH secundário: Força de Mordida
Densidade Óssea/fisiologia
Força Compressiva/fisiologia
Simulação por Computador
Projeto Auxiliado por Computador
Implantação Dentária/métodos
Módulo de Elasticidade/fisiologia
Seres Humanos
Dente Molar/diagnóstico por imagem
Porosidade
Estresse Mecânico
Tomografia Computadorizada por Raios X/métodos
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Dental Implants)
[Em] Mês de entrada:1711
[Cu] Atualização por classe:171109
[Lr] Data última revisão:
171109
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170905
[St] Status:MEDLINE


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Bussadori, Sandra Kalil
Texto completo
[PMID]:28789647
[Au] Autor:Salgueiro MDCC; Bortoletto CC; Horliana ACR; Mota ACC; Motta LJ; Motta PB; MesquitaFerrari RA; Fernandes KPS; Bussadori SK
[Ad] Endereço:Postgraduate program in Biophotonics Applied to Health Sciences, Nove de Julho University, Rua Vergueiro, 249 - Liberdade, São Paulo, SP, CEP 0154001, Brazil.
[Ti] Título:Evaluation of muscle activity, bite force and salivary cortisol in children with bruxism before and after low level laser applied to acupoints: study protocol for a randomised controlled trial.
[So] Source:BMC Complement Altern Med;17(1):391, 2017 Aug 08.
[Is] ISSN:1472-6882
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:BACKGROUND: Bruxism is a repetitive activity that causes tooth wear, audible sounds, and discomfort. Preventive measures have been studied for conditions that can exert a negative influence on physiological development in children. Low-level laser therapy administered over acupoints is an effective, painless, low-cost treatment option that has achieved good results. Thus, the aim of the proposed study is to evaluate changes in muscle activity, bite force and salivary cortisol in children with bruxism after the application of low-level laser to accupoints. METHODS: The children will be randomly allocated to four groups of 19 individuals: G1 - low-level laser; G2 - occlusal splint; G3 - placebo laser; and G4 - control (without bruxism). The BTS TMJOINT electromyography will be used to determine muscle activity and a digital gnathodynamometer will be used to measure bite force. Salivary cortisol will be analysed at baseline as well as one and six months after treatment. Two-way ANOVA will be employed and complemented by Tukey's test. DISCUSSION: Bruxism is a repetitive activity of the masticatory muscles that can have negative consequences if not treated, such as tooth wear, noises, discomfort and anxiety. Thus, control and treatment measures should be taken. Although low-level laser therapy over acupoints has been indicated for children, the effects of this treatment modality have not yet been studied. TRIAL REGISTRATION: NCT02757261 on 8 April 2016. This study protocol received a grant from the Brazilian fostering agency São Paulo Research Foundation (FAPESP: #2015/24731-0).
[Mh] Termos MeSH primário: Pontos de Acupuntura
Força de Mordida
Bruxismo/terapia
Hidrocortisona/metabolismo
Terapia com Luz de Baixa Intensidade
Músculos da Mastigação/fisiologia
[Mh] Termos MeSH secundário: Bruxismo/metabolismo
Criança
Eletromiografia
Feminino
Seres Humanos
Masculino
Projetos de Pesquisa
Saliva/metabolismo
Resultado do Tratamento
[Pt] Tipo de publicação:JOURNAL ARTICLE; RANDOMIZED CONTROLLED TRIAL
[Nm] Nome de substância:
WI4X0X7BPJ (Hydrocortisone)
[Em] Mês de entrada:1709
[Cu] Atualização por classe:170901
[Lr] Data última revisão:
170901
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170810
[St] Status:MEDLINE
[do] DOI:10.1186/s12906-017-1905-y


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[PMID]:28739169
[Au] Autor:Zhang L; Zheng Y; Rong Q; Wu G
[Ad] Endereço:Department of Prosthodontics, The First People's Hospital of Yunnan Province, 172 Jinbi Road, Kunming 650032, Yunnan Province, China.
[Ti] Título:Development and application of a perioral force measurement system for infants with cleft lip and palate.
[So] Source:J Plast Reconstr Aesthet Surg;70(11):1608-1613, 2017 Nov.
[Is] ISSN:1878-0539
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:BACKGROUND: Muscles converge or intertweave around the perioral area, and this can be treated with sequential therapy in infants with cleft lip and palate (CLP). The force of perioral muscles has a great influence on maxillary development and morphology. Perioral force in infants with CLP has not been well studied, and accurate and reliable measurement of perioral force in infants remains a challenge. This study aimed to investigate a new way to accurately and reliably measure perioral force in infants with unilateral CLP (UCLP) and explore the change before and after cheiloplasty. STUDY DESIGN: A perioral force measurement system was developed and applied to measure perioral force at labial frenum area and the commissures on both the normal and the cleft sides of four infants with UCLP before and after cheiloplasty. The results were analyzed using the SPSS 19.0 software. RESULTS: The perioral force measurement system appears to produce valid results in infants with UCLP. Before cheiloplasty, the perioral force of labial frenum area was 1.79 ± 0.94 g/cm and that of commissure on the normal and cleft sides was 5.41 ± 1.01 g/cm and 3.12 ± 1.55 g/cm , respectively (P < 0.05). After cheiloplasty, perioral force of labial frenum area was 12.73 ± 3.51 g/cm and that of commissure on the normal and cleft sides was 7.64 ± 1.64 g/cm and 7.27 ± 1.89 g/cm , respectively (P > 0.05).
[Mh] Termos MeSH primário: Força de Mordida
Fenda Labial/cirurgia
Fissura Palatina/cirurgia
Procedimentos Cirúrgicos Reconstrutivos/métodos
[Mh] Termos MeSH secundário: Cefalometria
Fenda Labial/fisiopatologia
Fissura Palatina/fisiopatologia
Seres Humanos
Lactente
Maxila/cirurgia
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1711
[Cu] Atualização por classe:171102
[Lr] Data última revisão:
171102
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170726
[St] Status:MEDLINE


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[PMID]:28414608
[Au] Autor:Iwasaki LR; Gonzalez YM; Liu Y; Liu H; Markova M; Gallo LM; Nickel JC
[Ad] Endereço:1 School of Dentistry, Departments of Orthodontics & Dentofacial Orthopedics and Oral & Craniofacial Sciences, University of Missouri-Kansas City, Kansas City, MO, USA.
[Ti] Título:Mechanobehavioral Scores in Women with and without TMJ Disc Displacement.
[So] Source:J Dent Res;96(8):895-901, 2017 Jul.
[Is] ISSN:1544-0591
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Cartilage fatigue may be a factor in the precocious development of degenerative changes in the temporomandibular joint (TMJ). This cross-sectional study estimated potential for cartilage fatigue via TMJ energy densities (ED) and jaw muscle duty factors (DF), which were combined to calculate mechanobehavioral scores (MBS) in women with (+) and without (-) bilateral TMJ disc displacement (DD). All subjects gave informed consent to participate and were examined using Diagnostic Criteria (DC) for Temporomandibular Disorders (TMD) and magnetic resonance (MR) and computed tomography (CT) images. Forty-seven subjects were categorized into +DD ( n = 29) and -DD ( n = 18) groups. Dynamic stereometry (MR images combined with jaw-tracking data) characterized individual-specific data of TMJ stress-field mechanics to determine ED (ED = W/ Q mJ/mm , where W = work done, Q = volume of cartilage) during 10 symmetrical jaw-closing cycles with a 20-N mandibular right canine load. Subjects were trained to record masseter and temporalis electromyography over 3 days and 3 nights. Root mean square electromyography/bite-force calibrations determined subject-specific masseter and temporalis muscle activities per 20-N bite-force (T , µV), which defined thresholds. Muscle DF (DF = % duration of muscle activity/total recording time) were determined for a range of thresholds, and MBS (ED × DF) were calculated. Intergroup differences in ED, DF, and MBS were assessed via analyses of variance with Bonferroni and Tukey honest significant difference post hoc tests. Average ED for contralateral TMJs was significantly larger ( P = 0.012) by 1.4-fold in +DD compared to -DD subjects. Average DF were significantly larger (all P < 0.01) for +DD compared to -DD subjects by 1.7-, 2.5-, and 1.9-fold for day, night, and overall, respectively. Daytime MBS were significantly larger (all P < 0.04) by up to 8.5-fold in +DD compared to -DD subjects. Significantly larger ED, DF, and MBS were shown in women with compared to women without bilateral TMJ DD.
[Mh] Termos MeSH primário: Disco da Articulação Temporomandibular/fisiopatologia
Transtornos da Articulação Temporomandibular/fisiopatologia
[Mh] Termos MeSH secundário: Adulto
Fenômenos Biomecânicos
Força de Mordida
Estudos de Casos e Controles
Estudos Transversais
Eletromiografia
Feminino
Seres Humanos
Músculo Masseter/fisiopatologia
Músculo Temporal/fisiopatologia
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1709
[Cu] Atualização por classe:170906
[Lr] Data última revisão:
170906
[Sb] Subgrupo de revista:D; IM
[Da] Data de entrada para processamento:170418
[St] Status:MEDLINE
[do] DOI:10.1177/0022034517704375


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[PMID]:28232963
[Au] Autor:Zhou SY; Mahmood H; Cao CF; Jin LJ
[Ti] Título:Teeth under High Occlusal Force may Reflect Occlusal Trauma-associated Periodontal Conditions in Subjects with Untreated Chronic Periodontitis.
[So] Source:Chin J Dent Res;20(1):19-26, 2017.
[Is] ISSN:1462-6446
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:OBJECTIVE: To determine the association of high occlusal force (HOF) with the signs of occlusal trauma and periodontal conditions in periodontitis patients, and elaborate the relevant clinical implications. METHODS: Periodontal parameters and signs of occlusal trauma were recorded for 807 teeth in 30 subjects with untreated chronic periodontitis. The T-scan II occlusal analysis system determined the HOF during maximum intercuspation, lateral excursion and protrusive excursion. The correlation of HOF with periodontal parameters and signs of occlusal trauma was analysed. RESULTS: Overall, the teeth with HOF existed mainly in molars and presented with deeper probing depth (PD) and higher frequency of bleeding on probing (BOP) than those without HOF. The fixed-effect analysis showed that HOF was positively correlated with PD and BOP (P < 0.05) in posterior teeth; widened periodontal ligament space on radiographs in upper (r = 0.179, P < 0.01) and lower posterior teeth (r = 0.205; P < 0.05); as well as functional mobility in upper posterior teeth (r = 0.168; P < 0.05). CONCLUSION: This study suggests that the posterior teeth with HOF in subjects with chronic periodontitis may reflect occlusal trauma-associated periodontal conditions that could probably increase the risk of further periodontal destruction. These findings may improve the clinical assessment of occlusal trauma and related periodontal conditions for better patient management and treatment outcomes.
[Mh] Termos MeSH primário: Força de Mordida
Periodontite Crônica/complicações
Oclusão Dentária Traumática/etiologia
[Mh] Termos MeSH secundário: Feminino
Seres Humanos
Masculino
Meia-Idade
Índice Periodontal
Ligamento Periodontal/diagnóstico por imagem
Bolsa Periodontal
Radiografia Dentária Digital
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1707
[Cu] Atualização por classe:170727
[Lr] Data última revisão:
170727
[Sb] Subgrupo de revista:D; IM
[Da] Data de entrada para processamento:170225
[St] Status:MEDLINE
[do] DOI:10.3290/j.cjdr.a37738


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[PMID]:28112493
[Au] Autor:Hatta R; Maeda K; Shamoto H; Wakabayashi H
[Ad] Endereço:Aiseikai Yamashina Hospital, Kyoto, Japan.
[Ti] Título:Correlation between nutritional status and frailty regarding saliva secretion and occlusal force in community-dwelling older people.
[So] Source:Geriatr Gerontol Int;17(1):177-179, 2017 Jan.
[Is] ISSN:1447-0594
[Cp] País de publicação:Japan
[La] Idioma:eng
[Mh] Termos MeSH primário: Força de Mordida
Estado Nutricional
[Mh] Termos MeSH secundário: Nível de Saúde
Seres Humanos
Saliva
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171030
[Lr] Data última revisão:
171030
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170124
[St] Status:MEDLINE
[do] DOI:10.1111/ggi.12775


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[PMID]:28024782
[Au] Autor:Patterson BM; Dalci O; Papadopoulou AK; Madukuri S; Mahon J; Petocz P; Spahr A; Darendeliler MA
[Ad] Endereço:Discipline of Orthodontics, Faculty of Dentistry, University of Sydney, Sydney Dental Hospital, Sydney South West Area Health Service, Sydney, Australia.
[Ti] Título:Effect of piezocision on root resorption associated with orthodontic force: A microcomputed tomography study.
[So] Source:Am J Orthod Dentofacial Orthop;151(1):53-62, 2017 Jan.
[Is] ISSN:1097-6752
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:INTRODUCTION: The purpose of this study was to investigate the effect of piezocision on orthodontically induced inflammatory root resorption. METHODS: Fourteen patients were included in this split-mouth study; 1 side was assigned to piezocision, and the other side served as the control. Vertical corticotomy cuts of 4 to 5 mm in length were performed on either side of each piezocision premolar, and 150-g buccal tipping forces were applied to the premolars. After 4 weeks, the maxillary first premolars were extracted and scanned with microcomputed tomography. RESULTS: There was a significantly greater total amount of root resorption seen on the piezocision sides when compared with the control sides (P = 0.029). The piezocision procedure resulted in a 44% average increase in root resorption. In 5 patients, there was noticeable piezocision-related iatrogenic root damage. When that was combined with the orthodontic root resorption found on the piezocision-treated teeth, there was a statistically significant 110% average increase in volumetric root loss when compared with the control side (P = 0.005). CONCLUSIONS: The piezocision procedure that initiates the regional acceleratory phenomenon may increase the iatrogenic root resorption when used in conjunction with orthodontic forces. Piezocision applied close to the roots may cause iatrogenic damage to the neighboring roots and should be used carefully.
[Mh] Termos MeSH primário: Piezocirurgia/efeitos adversos
Reabsorção da Raiz/etiologia
[Mh] Termos MeSH secundário: Adolescente
Dente Pré-Molar/cirurgia
Força de Mordida
Feminino
Seres Humanos
Masculino
Reabsorção da Raiz/diagnóstico por imagem
Extração Dentária/métodos
Raiz Dentária/diagnóstico por imagem
Raiz Dentária/cirurgia
Microtomografia por Raio-X
Adulto Jovem
[Pt] Tipo de publicação:CLINICAL TRIAL; JOURNAL ARTICLE
[Em] Mês de entrada:1703
[Cu] Atualização por classe:170817
[Lr] Data última revisão:
170817
[Sb] Subgrupo de revista:D; IM
[Da] Data de entrada para processamento:161228
[St] Status:MEDLINE



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