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Desenvolvimento de plataforma elíptica osseointegrável para implante dentário, guias de perfuração e técnica cirúrgica de implantação - estudo em fêmures de cães; Development of osseointegrated elliptic platform for dental implant, surgical guides and surgical technique of implantation study in femurs of dogs

Ferreira, Jonathan
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em 10/02/2009 PT
Relevância na Pesquisa
66.53%
O objetivo deste estudo foi desenvolver um implante dentário para utilização em cães, com formato semelhante aos dentes bi-radiculares destes animais e a técnica cirúrgica para sua implantação, com características que permitam a osseointegração. O implante é composto por três peças, dois implantes cônicos rosqueados unidos à plataforma elíptica cônica por parafusos e implantados abaixo do nível ósseo. Foram utilizados 20 fêmures de cães para o desenvolvimento deste projeto e os implantes foram colocados na região epifisária destes ossos. A perfuração foi guiada através de três tipos de guias cirúrgicas confeccionadas em alumínio com dimensões compatíveis a dos implantes e das plataformas. A osteotomia foi avaliada com mensurações diretas e a adaptação do implante foi avaliada radiograficamente. O implante desenvolvido é bastante semelhante à porção radicular dos dentes bi-radiculares dos cães. A técnica cirúrgica de perfuração e osteotomia foi eficiente e a avaliação radiográfica revelou boa adaptação entre as peças e paralelismo entre os implantes rosqueados. Essas conclusões permitem sugerir que, seguindo esta metodologia, com a plataforma confeccionada em liga de titânio, este tipo de implante deve se osteointegrar ao osso adjacente.; The aim of this study was to develop a dental implant for use in dogs with similar format to the biradicular teeth of these animals and surgical technique for its implantation...

A survey of radiographic prescription in dental implant assessment

Sakakura, C. E.; Morais, JAND; Loffredo, LCM; Scaf, G.
Fonte: British Inst Radiology Publicador: British Inst Radiology
Tipo: Artigo de Revista Científica Formato: 397-400
ENG
Relevância na Pesquisa
56.63%
Objectives: To survey the current radiographic prescriptions in dental implant assessment amongst dentists in Brazil.Methods: Sixty-nine dentists were interviewed during a dental implant meeting by two calibrated graduate students, using a 19-question questionnaire, considering imaging modality options both for pre-operative implant site assessment and for follow-up, particularly with respect to cost, patient radiation dose, and broad coverage of facial bones and teeth. Epi-Info 6.04 software was used to analyse the database file.Results: Approximately 63.8% of the dentists prescribed only panoramic radiography for dental implant assessment and 28.9% ordered panoramic radiography plus periapical radiography and/or conventional tomography and/or computed tomography (CT). Only 7.2% of the dentists ordered conventional tomography or CT as a single examination, although 10.1% ordered it in combination with other imaging modalities. The main reasons given for prescribing panoramic radiography were broad coverage and cost (86.4%).Conclusions: This study has shown that most of the dentists in this study prescribe panoramic radiographs in dental implant assessment based on broad coverage and cost. They are not following the American Academy of Oral and Maxillofacial Radiology recommendations regarding cross-sectional imaging.

Genetic association study between Interleukin 10 gene and dental implant loss

Pigossi, Suzane C.; Alvim-Pereira, Fabiano; Montes, Claudia C.; Finoti, Livia S.; Secolin, Rodrigo; Trevilatto, Paula C.; Scarel-Caminaga, Raquel M.
Fonte: Pergamon-Elsevier B.V. Ltd Publicador: Pergamon-Elsevier B.V. Ltd
Tipo: Artigo de Revista Científica Formato: 1256-1263
ENG
Relevância na Pesquisa
56.65%
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP); Processo FAPESP: 09/09932-8; Objective: Three single nucleotide polymorphisms (SNPs), -1082, -819 and -592, located on the promoter region of IL10 gene have been associated with high in vitro IL-10 production and autoimmune diseases. We aim to investigate whether polymorphisms in the IL10 gene would influence dental implant loss.Methods: We evaluated a total of 277 unrelated patients, including 185 individuals presenting at least one osseointegrated implant in function for six months or more and with no implant failure, and 92 individuals presenting at least one implant loss. DNA was extracted from buccal mucosa cells and SNPs were genotyped using TaqMan (R) probes-based assays.Results: Multiple logistic regression showed association between dental implant failure with -819(C/T) genotype (OR = 3.27; 95% CI = 1.02-10.46; p = 0.0334). However, considering the statistical significance level alpha = 0.004 (adjusted by Bonferroni correction of multiple comparisons), these results lost their significance. No association of dental implant loss with genotypes and alleles of the -1082 and -592 SNPs, as well as IL10 haplotypes in genotype/allele forms were found (p = 0.9400; p = 0.8861).Conclusions: Neither the IL10 gene polymorphisms...

Association of Interleukin 4 Gene Polymorphisms With Dental Implant Loss

Pigossi, Suzane C.; Alvim-Pereira, Fabiano; Alvim-Pereira, Claudia C. K.; Trevilatto, Paula C.; Scarel-Caminaga, Raquel M.
Fonte: Lippincott Williams & Wilkins Publicador: Lippincott Williams & Wilkins
Tipo: Artigo de Revista Científica Formato: 723-731
ENG
Relevância na Pesquisa
66.6%
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP); Processo FAPESP: 09/09932-8; Purpose: The purpose of this study was to investigate the association between interleukin 4 (IL4) polymorphisms/haplotypes and dental implant loss.Materials and Methods: Two hundred and seventy eight (n = 278) unrelated patients were divided into 2 groups: (1) control group (C) composed of 186 individuals presenting at least 1 osseointegrated implant and (2) study group (S) composed of 94 individuals presenting at least 1 implant loss. After DNA collection, IL4 polymorphisms were investigated by polymerase chain reaction (PCR)restriction fragment length polymorphism and for the variable number of tandem repeat (VNTR) only by PCR.Results: No association between alleles/genotypes of -590 (C/T) (P = 0.9704/P = 0.5992) and VNTR (P = 0.7155/P = 0.8789) polymorphisms and implant loss were found between the groups. Regarding +33 (C/T) polymorphism, no difference was found in genotype frequency (P = 0.1288), but the C allele was associated with implant loss (P = 0.0236, odds ratio = 1.61, 95% confidence interval = 1.1-2.4). Haplotype analysis showed no statistical differences between the groups.Conclusion: The C allele of the +33 (C/T) polymorphism in the IL4 gene was associated with susceptibility to dental implant loss in Brazilians in the studied population.

BIOMECHANICAL BEHAVIOR OF THE SYSTEM PROSTHESIS/DENTAL IMPLANT: ANALYSIS BY THE PHOTOELASTICITY METHOD

Lopes, Sarah Bessi; Correa, Cassia Belloto; Araujo, Cleudmar Amaral de; Vaz, Luis Geraldo; SilvaGomes, J. F.; Vaz, MAP
Fonte: Inegi-inst Engenharia Mecanica E Gestao Industrial Publicador: Inegi-inst Engenharia Mecanica E Gestao Industrial
Tipo: Conferência ou Objeto de Conferência Formato: 2
ENG
Relevância na Pesquisa
66.59%
One of the main reasons for the failure in dental implant treatments is the overload, which can cause bone resorption and later, the osseointegration loss in the implant. Therefore, the aim of this study was to analyze the tension generated around dental implants in the rehabilitation of three mandible posterior teeth, varying the connection type, the disposal, and the quantity of implants. The photoelasticity method was used in order to accomplish it. Through photoelasticity, the quantity and localization of the tensions around the implants in the different studied groups were compared (three straight line implants, three offset placement implants, two implants with a mesial cantilever, and two implants with a pontic). The results showed that the tension quantity and disposition around the dental implants of the connection external hexagon and internal hexagon were similar in all groups. In the group where the cantilever was used, an increase of the tension around the implant, adjacent to the cantilever, was observed. From the results it is concluded that the type of connection used in this study did not influence the tension quantity and distribution around the implants; however, the prosthetic configuration with the cantilever use...

Photoelastic analysis of fixed partial prosthesis crown height and implant length on distribution of stress in two dental implant systems = : Análise fotoelástica da distribuição de tensão em função do comprimento do implante e altura da coroa em prótese parcial fixa em dois sistemas de implantes dentários; Análise fotoelástica da distribuição de tensão em função do comprimento do implante e altura da coroa em prótese parcial fixa em dois sistemas de implantes dentários

Evandro Portela Figueirêdo
Fonte: Biblioteca Digital da Unicamp Publicador: Biblioteca Digital da Unicamp
Tipo: Tese de Doutorado Formato: application/pdf
Publicado em 27/03/2013 PT
Relevância na Pesquisa
56.61%
O objetivo do presente estudo foi comparar, por meio de fotoelasticidade, sob carregamento axial e não-axial, a distribuição de tensão em implantes curtos e longos, em dois sistemas de implantes dentários com próteses parciais fixas de 2 elementos com diferentes alturas de coroa. Para tanto, 16 modelos fotoelásticos foram divididos em 4 grupos: I- Implante Longo 5x11mm Neodent® -Titamax CM Cortical; II- Implante Longo 5x11mm Bicon®; III- Implante Curto 5x6mm Neodent® - Titamax WS Cortical; IV- Implante Curto 5x6mm Bicon®. Cada grupo foi submetido a cargas axial (0°, 0,5 Kgf) e não-axial (15°, 0,5 Kgf), tanto com coroa protética de 8 mm quanto de 13 mm de altura. A análise dos resultados evidenciou que o comprimento do implante foi um fator estatisticamente significativo, tanto para o carregamento axial quanto para o carregamento não-axial. Sob carregamento axial, os implantes do sistema Neodent® com coroa de 13 mm de altura apresentaram maior tensão de cisalhamento (31.5 ± 16.5 MPa) quando comparados aos implantes do mesmo sistema com coroa de 8 mm (25.7 ± 11.4 MPa) (p<0.05). Os implantes de comprimento curto apresentaram maior tensão (33.4 ± 16.0 MPa) que os implantes longos (24.6 ± 12.5 MPa) quando próteses de 8 mm foram utilizadas sob carregamento axial (p<0.05). Implantes Neodent® que receberam coroas protéticas de 8 mm apresentaram maior tensão (31.43 ± 15.44 MPa) que os implantes do sistema Bicon® com a mesma altura da coroa (26.18 ± 13.00 MPa) sob carregamento não-axial (p<0.05). Próteses de 13 mm de altura não levaram a diferenças estatisticamente significantes na distribuição de tensão entre os dois sistemas e entre os dois comprimentos de implantes analisados...

Dental implant surface modifications and osteointegration

Toledo, Valentina Andrea Ormazabal
Fonte: Universidade Católica Portuguesa Publicador: Universidade Católica Portuguesa
Tipo: Dissertação de Mestrado
Publicado em 09/09/2013 ENG
Relevância na Pesquisa
66.73%
Osteointegration can be defined as the direct contact between the living bone and the implant surface without interposed soft tissue at the microscope level and it is a critical process to guarantee implant stability and consequent short and long term clinical success. Several factors are known to influence the efficiency of the osteointegration: bone status; loading conditions; implant design and material; implant surface and surgical technique. Surface conditions are particularly important as they play a major role in the osteointegration process. Several characteristics among implant surface, such as surface composition, physic-chemical properties, surface wettability and roughness influence the rate and quality of osteointegration. Over the past three decades, the use of dental implants raised exponentially and widely expanded among the dental manufactures. The growing interest in improving the dental implant/bone interface has been addressed through the use of several techniques available for the modification of the surfaces dental implants in order to induce bioactivity. Different surface properties can induce different gene and protein expression in the osteogenic cells and also different structural and biomechanical properties to the surrounding mineralized tissue. This can result in different speed...

Titanium dental implant surfaces

Elias,Carlos Nelson
Fonte: Rede Latino-Americana de Materiais Publicador: Rede Latino-Americana de Materiais
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/01/2010 EN
Relevância na Pesquisa
66.58%
Osseointegration has been defined as "a direct structural and functional connection between ordered, living bone and the surface of a load-carrying implant". However, titanium and its alloys cannot directly bond to living bone after being implanted into the body. The osseointegration of titanium dental implants is critically dependent on the implant surface properties. Various surface modifications have been proposed in order to provide commercially pure titanium with bioactive bone bonding ability. In the present work, the titanium dental implant surface morphology was modified by acid etching and electrochemical treatments with the purpose of enhancing tissue response, and decreasing the waiting time for implant loading. The results show that surface morphology, topography, roughness and chemical composition were changed by the treatments and these changes has a significant influence on osseointegration. The best results were observed in the samples submitted to the electrochemical treatment.

Numerical study of effect of elastomeric stress absorbers on stress reduction in bone-dental implant interface

MEHDI,Ghalem; BELARBI,Abderrahmane; MANSOURI,Bensmaine; AZARI,Zitouni
Fonte: Faculdade De Odontologia De Bauru - USP Publicador: Faculdade De Odontologia De Bauru - USP
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/02/2015 EN
Relevância na Pesquisa
56.6%
Objective This paper focused on optimal stress distribution in the mandibular bone surrounding a dental implant and is devoted to the development of a modified Osteoplant® implant type in order to minimize stress concentration in the bone-implant interface. Material and Methods This study investigated 0.4 mm thick layers of two elastomeric stress barriers incorporated into the dental implant using 3-D finite element analysis. Results Overall, this proposed implant provoked lower load transfer in bone-implant interface due to the effect of the elastomers as stress absorbers. The stress level in the bone was reduced between 28% and 42% for three load cases: 75 N, 60 N and 27 N in corono-apical, linguo-buccal and disto-mesial direction, respectively. Conclusion The proposed model provided an acceptable solution for load transfer reduction to the mandible. This investigation also permitted to choose how to incorporate two elastomers into the Osteoplant® implant system.

Virtual planning for dental implant placement using guided surgery

Viegas, Vinicius Nery; Lacroix, Celso Gustavo Schwalm; Pagnoncelli, Rogério Miranda; Oliveira, Marília Gerhardt de
Fonte: In Tech; Croatia; Porto Alegre Publicador: In Tech; Croatia; Porto Alegre
Tipo: Parte de Livro
EN
Relevância na Pesquisa
66.61%
1. Introduction Technical and scientific advances in diagnostic and therapeutic methods in the biomedical field have substantially increased the predictability and longevity of the outcomes of restorative surgical procedures. In contemporary oral implantology, bioprototyping techniques based on computer-aided design and computer-aided manufacturing (CAD/CAM) technology have proven to be valuable aids in diagnosis, treatment planning, and surgical intervention. Among other aspects, use of these technologies improves preoperative planning, makes it easier for patients to understand proposed procedures, increases the predictability of treatment, and may reduce surgical morbidity. The preliminary stages that precede dental implant surgery are as important as the actual operative intervention itself, or even more so. Inadequate placement of implants may injure important anatomical structures or lead to aesthetic or functional compromise of the prosthetic stage of oral rehabilitation. Implant planning and placement can be based solely on computed tomography data and surgical guides fashioned after diagnostic models. However, direct three-dimensional visualization of the surgical site and real-model simulation of the intended surgical procedure can play a significant role in obtaining outcomes that are more consistent with the original treatment plan. Biomedical prototypes...

Avaliação da microestrutura óssea de sítios implantares e fatores relacionados às alterações no nível ósseo marginal e estabilidade de implantes dentários: estudo clínico prospectivo; Assessment of microstructure of jawbone sites and factors related to the changes on marginal bone level and dental implant stability: prospective clinical study

Dias, Danilo Rocha
Fonte: Universidade Federal de Goiás; Brasil; UFG; Programa de Pós-graduação em Ciências da Saúde (FM); Faculdade de Medicina - FM (RG) Publicador: Universidade Federal de Goiás; Brasil; UFG; Programa de Pós-graduação em Ciências da Saúde (FM); Faculdade de Medicina - FM (RG)
Tipo: Tese de Doutorado Formato: application/pdf
POR
Relevância na Pesquisa
56.6%
Bone characteristics influence surgical/prosthetic planning of implant treatment, but it is not clear their influence on longitudinal outcomes. This study aimed to investigate the association between jawbone microstructure and changes on marginal bone level (MBL) and implant stability (IS) after loading, in a 1-year follow-up. Forty-one volunteers received 97 dental implants, installed in bone sites classified from 1 to 4, according to Leckholm & Zarb (1985). Cortical bone thickness was measured on computed tomography images. Histomorphometric and microtomographic analyses were performed in bone specimens obtained by using a trephine bur, at first drilling. Peak insertion torque (PIT) and implant stability quotient (ISQ) measured by resonance frequency analysis (RFA) were registered at implant insertion. Periapical radiographs were standardized to measure the MBL, and were taken at three moments, when the ISQ was also measured: at uncovering stage, at loading and at 1-year follow-up. Agreement analysis between histomorphometry and microcomputed tomography (microCT) showed that these methods are complementary, but not interchangeably. Association tests revealed that ISQ changes were not affected by MBL changes. Bone type 4 (according L&Z) presented higher changes on ISQ...

Uma metodologia para avaliação do parafuso pilar em implantes dentários usando fotoelasticidade automatizada; A Metodology for Evaluation of a Pilar Screw of a Dental Implant Using The Automatizated Plane Photoelasticity Technique

Souza, Gualter Aurélio Alves de
Fonte: Universidade Federal de Uberlândia Publicador: Universidade Federal de Uberlândia
Tipo: Dissertação
POR
Relevância na Pesquisa
66.6%
O parafuso pilar é um importante elemento constituinte de implantes dentários convencionais. Ele é utilizado para fixar o pilar ou intermediário ao implante. Em implantes dentários convencionais, o nível de torque aplicado é da ordem de 20 Ncm, porém sabe-se que o parafuso pilar resiste a maiores níveis de torque, e que uma maior pré-carga aplicada poderia melhorar sua fixação. Muitos problemas relacionados às fraturas e desapertos do parafuso são relacionados na literatura. A melhoria das condições de osseointegração e do projeto dos implantes dentários poderia proporcionar a aplicação de maiores torques aos parafusos pilar, minimizando os problemas de desaperto. Para isso, é importante o conhecimento do comportamento físico destes elementos quanto ao campo de tensão e deformação, quando um certo nível de torque e pré-carga são aplicados. Neste trabalho, o gradiente de tensões no parafuso de pilar foi estudado com um nível de pré-carga aplicado. Foi utilizada a técnica da fotoelasticidade de transmissão plana em um modelo fotoelástico de um implante dentário convencional da empresa Conexão Sistemas de Prótese Ltda. Um programa em ambiente Matlab foi desenvolvido para adquirir e processar as imagens das franjas...

The nature and frequency of bisphosphonate-associated osteonecrosis of the jaws in dental implant patients: A South Australian case series

Goss, A.; Bartold, P.; Sambrook, P.; Hawker, P.
Fonte: W B Saunders Co Publicador: W B Saunders Co
Tipo: Artigo de Revista Científica
Publicado em //2010 EN
Relevância na Pesquisa
56.63%
PURPOSE: To determine the number of bisphosphonate-associated cases of dental implant failure in South Australia. MATERIALS AND METHODS: All general and specialist dentists who place dental implants in South Australia were contacted and asked to provide information on the total number of implants placed over the decade to December 2007. Cases of bisphosphonate-associated implant failure were identified. RESULTS: All 46 practitioners involved in implant placement and the management of bisphosphonate-associated osteonecrosis of the jaws in South Australia were identified. Approximately 28,000 implants had been placed in 16,000 patients. We identified 7 cases of oral bisphosphonate-associated implant failure, with 3 cases of failure of osseointegration and 4 cases of successful implants losing integration after being placed on oral bisphosphonates. There were 5 women and 2 men, and the mean age was 65.7 years (range, 49-75 years). Only 1 was medically compromised, with steroids and diabetes. No cases of implant failure in intravenous bisphosphonate cases were identified. On the basis of the assumption that 5% of the patients were taking an oral bisphosphonate, 1 in 114 (0.89%) had implant failure. CONCLUSION: In patients taking oral bisphosphonates...

Influence of smoking on the survival rate of various dental implant systems - an 18-year report; Einfluss des Rauchens auf die Verweildauerwahrscheinlichkeit dentaler Implantate unterschiedlicher Systeme unter Berücksichtigung der Dosisabhängigkeit

Gómez-Román, Germán; Maier, Ernst-Ludwig; Lukas, Dieter
Fonte: Universidade de Tubinga Publicador: Universidade de Tubinga
Tipo: ResearchPaper
EN
Relevância na Pesquisa
56.62%
Influence of smoking on the survival rate of various dental implant systems - an 18-year report Purpose: This inquiry was done to reveal possible negative effects of smoking on the probability of survival of implants. Patients and Methods: The influence of smoking on the success of dental implants was studied using 934 implant patients who had been treated with various implant systems. 712 patients (76.1%) identified themselves as non-smokers, 223 (23.9%) as smokers. A total of 1776 implants including Bonefit (212), Brånemark system (42), Frialit-2 (555), IMZ (179), TPS (21), ITI (1) and Tübingen (761) types were placed in these 934 patients. 1379 implants (77.7%) were placed in non-smokers, 379 (22.3%) in smokers. Results: The smokers showed higher failure rates and significantly reduced implant survival rates (Kaplan-Meier). The negative consequences of smoking were evident even at a very low rate of tobacco consumption per day. The degree of influence resulting from smoking depended on the location of the implant. This was most clearly noticed with a reduction of the implant prognosis in the maxilla. Conclusions: The particularly marked reduction in the probability of success in the maxilla over the entire survival period of the implant led to the hypothesis that the primary causes for the reduced implant prognosis was long-term local effects. These effects seemed to be the result of two causes: the toxic chemical effect of components of tobacco smoke on the peri-implant tissue and the damage caused by forces below the threshold of perception which affect the implants. The forces result from soft tissue movements...

Dealing with dental implant failures

Levin,Liran
Fonte: Faculdade De Odontologia De Bauru - USP Publicador: Faculdade De Odontologia De Bauru - USP
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/06/2008 EN
Relevância na Pesquisa
56.62%
An implant-supported restoration offers a predictable treatment for tooth replacement. Reported success rates for dental implants are high. Nevertheless, failures that mandate immediate implant removal do occur. The consequences of implant removal jeopardize the clinician's efforts to accomplish satisfactory function and esthetics. For the patient, this usually involves further cost and additional procedures. The aim of this paper is to describe different methods and treatment modalities to deal with dental implant failure. The main topics for discussion include identifying the failing implant, implants replacing failed implants at the exact site, and the use of other restorative options.When an implant fails, a tailor made treatment plan should be provided to each patient according to all relevant variables. Patients should be informed regarding all possible treatment modalities following implant failure and give their consent to the most appropriate treatment option for them.

Dealing with dental implant failures

Levin, Liran
Fonte: Universidade de São Paulo. Faculdade de Odontologia de Bauru Publicador: Universidade de São Paulo. Faculdade de Odontologia de Bauru
Tipo: info:eu-repo/semantics/article; info:eu-repo/semantics/publishedVersion; ; ; Formato: application/pdf
Publicado em 01/06/2008 ENG
Relevância na Pesquisa
56.62%
An implant-supported restoration offers a predictable treatment for tooth replacement. Reported success rates for dental implants are high. Nevertheless, failures that mandate immediate implant removal do occur. The consequences of implant removal jeopardize the clinician's efforts to accomplish satisfactory function and esthetics. For the patient, this usually involves further cost and additional procedures. The aim of this paper is to describe different methods and treatment modalities to deal with dental implant failure. The main topics for discussion include identifying the failing implant, implants replacing failed implants at the exact site, and the use of other restorative options.When an implant fails, a tailor made treatment plan should be provided to each patient according to all relevant variables. Patients should be informed regarding all possible treatment modalities following implant failure and give their consent to the most appropriate treatment option for them.

Positional vertigo afterwards maxillary dental implant surgery with bone regeneration

Rodríguez Gutiérrez,Carlos; Rodríguez Gómez,Enrique
Fonte: Medicina Oral, Patología Oral y Cirugía Bucal (Internet) Publicador: Medicina Oral, Patología Oral y Cirugía Bucal (Internet)
Tipo: info:eu-repo/semantics/article; journal article; info:eu-repo/semantics/publishedVersion Formato: text/html; application/pdf
Publicado em 01/03/2007 ENG
Relevância na Pesquisa
66.52%
Benign paroxysmal positional vertigo (BPPV) is the most common form of vertigo. It is caused by loose otoconia from the utricle which, in certain positions, displaced the cupula of the posterior semicircular canal. BPPV most often is a result of aging. It also can occur after a blow to the head. Less common causes include a prolonged positioning on the back (supine) during some surgical procedures. Additionally one can include in this ethiopathogenesis the positioning required during the maxillary dental implant surgery with bone regeneration related to a forced head positioning and inner ear trauma induced by dental turbine noise working in the maxillary bone. Two cases of patients who suffered BPPV after undergoing maxillary dental implant with bone regeneration procedures are reported. Diagnosis and treatment are also described.

An alternative method to record rising temperatures during dental implant site preparation: a preliminary study using bovine bone

Laurito,Domenica; Lamazza,Luca; Garreffa,Girolamo; De Biase,Alberto
Fonte: Istituto Superiore di Sanità Publicador: Istituto Superiore di Sanità
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/12/2010 EN
Relevância na Pesquisa
66.44%
Overheating is constantly mentioned as a risk factor for bone necrosis that could compromise the dental implant primary stability. Uncontrolled thermal injury can result in a fibrous tissue, interpositioned at the implant-bone interface, compromising the long-term prognosis. The methods used to record temperature rise include either direct recording by thermocouple instruments or indirect estimating by infrared thermography. This preliminary study was carried out using bovine bone and a different method of temperatures rising estimation is presented. Two different types of drills were tested using fluoroptic thermometer and the effectiveness of this alternative temperature recording method was evaluated.

Clinical setting influences physiological responses in dental implant patients

Candido, Milene Cardoso; Andreatini, Roberto; Zielak, João Cesar
Fonte: UNICAMP/FOP Publicador: UNICAMP/FOP
Tipo: info:eu-repo/semantics/article; info:eu-repo/semantics/publishedVersion; ;
Publicado em 07/10/2015 POR
Relevância na Pesquisa
56.65%
Anxiety is often observed in dental procedures and may cause promote alteration in the physiological responses during implant surgeries. Aim: To evaluate changes in blood pressure and heart rate in patients undergoing dental implant procedures, considering the dental setting as the main variable. Methods: Fifty-five patients who underwent dental implant surgery were evaluated. Thirty-seven were treated at a university clinic and 18 were treated at a private office. Blood pressure and heart rate were measured at the following time-points: at the appointment prior to surgery (T0), immediately before the surgical procedure (T1), during anesthesia (T2), during implant installation (T3), immediately after the surgical procedure (T4) and at the first follow-up appointment after surgery (T5). The data were analyzed by two-way analysis of variance and Student’s t-test. Results: The university clinic patients had an increase in heart rate at T5 (t53=2.62, p<0.05) compared with private office patients. Systolic blood pressure in university clinic patients was higher at T2 (t53=2.86, p<0.01), T3 (t53=2.64, p<0.05), and T4 (t53=3.15, p<0.01). Diastolic blood pressure at T2 (t53=3.15, p<0.01) and T3 (t53=3.86, p<0.01) were also higher in university clinic patients. Conclusions: These results suggest that the dental setting is a relevant factor when planning dental implant surgery.

Surgeon heart rate analysis during the dental implant procedure;

Câmara, Paulo Roberto Silva; Santos, Mateus Bertolini Fernandes; Santos, Jarbas Francisco Fernandes; Cunha, Vicente de Paula Prisco; Marchini, Leonardo
Fonte: UNICAMP/FOP Publicador: UNICAMP/FOP
Tipo: info:eu-repo/semantics/article; info:eu-repo/semantics/publishedVersion; ; ;
Publicado em 19/01/2016 ENG
Relevância na Pesquisa
56.61%
Dental implant placement is a singular procedure in dentistry, and many variables should influence its success. The operator’s attitudes during surgeries are some of these variables. Considering that, the present paper aims to evaluate surgeon’s stress during different stages of dental implant placement. The heart rates of ten post-graduate students of implantology were evaluated at rest and during various steps of the implant placement procedure, using a Pollar R device. Each surgeon’s heart rate was monitored at different moments (preparation of the surgery; anaesthesia; incising and flapping procedures; bone perforating; implant placement at bone site; suture; end of the surgical procedure) during a single surgical implant insertion procedure (without additional procedures such as expansion, grafting and others). Implantodontic interventions were found to be the most stressful of these procedures, and implant placement in the bone site the most critical. Current procedures for the general practitioner, such as local anaesthesia, induced minor variations in the heart rate and, hence, less stress. ;