Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 4.287
Filtrar
1.
Compend Contin Educ Dent ; 44(1): e5-e9, 2023 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-36649497

RESUMO

Rehabilitation of edentulous patients with implant-supported overdentures has gained prominence over the use of conventional dentures because of the improved quality of life it provides patients. Various attachment systems are available that facilitate the insertion and removal of prostheses, and among them, the Locator attachment system has become popular due to its self-aligning property, simplicity of use, and minimal space requirement of male inserts within the denture. However, the loss of retention of nylon inserts over time requires their removal from the metal housing and subsequent replacement. This article describes an easy alternative technique for replacing the nylon inserts in the denture cap using a simple dental explorer and mirror head.


Assuntos
Nylons , Qualidade de Vida , Humanos , Masculino , Retenção de Dentadura/métodos , Prótese Dentária Fixada por Implante/métodos , Mandíbula , Materiais Dentários , Revestimento de Dentadura
2.
Gen Dent ; 71(1): 25-30, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-36592355

RESUMO

Maxillofacial trauma caused by automobile accidents can result in extensive loss of alveolar bone, teeth, and gingival tissues as well as a cleft palate. Patients who have undergone such trauma may experience a loss of vertical dimension of occlusion, esthetic deformity, and difficulties in speaking, chewing, and swallowing. Both prosthodontic and surgical treatment are required in these cases. This case report describes the use of palatoplasty and maxillary and mandibular complete overdentures with a ball attachment system supported by natural roots as rehabilitative treatment for a 65-year-old man who had been injured in an automobile accident 24 years previously. Palatoplasty was performed to close the cleft palate that resulted from the trauma. Other procedures, including tooth extractions, endodontic treatment, cementation of ball attachments, and fabrication of temporary removable partial dentures to reestablish the vertical dimension of occlusion, were performed before the overdentures were placed. This treatment reestablished the patient's chewing, phonetic, and esthetic functions at a lower cost than other treatment options. At the 1-year follow-up evaluation, the patient's oral health was satisfactory, with no loss of abutment teeth, and the prostheses were functioning correctly.


Assuntos
Fenda Labial , Fissura Palatina , Revestimento de Dentadura , Traumatismos Maxilofaciais , Idoso , Humanos , Masculino , Prótese Dentária Fixada por Implante , Retenção de Dentadura , Maxila , Extração Dentária
3.
Artigo em Inglês | MEDLINE | ID: mdl-36661886

RESUMO

The aim of current split-mouth study was to compare the implant treatment outcomes of hybrid-surface implants (minimally rough implant collar and moderately rough body) with moderately rough implants after 5 years in patients with a bar-supported mandibular overdenture. Fully edentulous patients were enrolled, and each patient received two implants: one moderately rough and one hybrid-surface implant. A total of 18 patients with 36 implants attended the 5-year recall, and the implant survival rate was 100%. The 5-year evaluation showed no significant difference in crestal bone loss or peri-implant health between the hybrid and moderately rough implants.


Assuntos
Perda do Osso Alveolar , Implantes Dentários , Arcada Edêntula , Humanos , Implantação Dentária Endóssea , Perda do Osso Alveolar/cirurgia , Arcada Edêntula/cirurgia , Planejamento de Prótese Dentária , Resultado do Tratamento , Revestimento de Dentadura , Prótese Dentária Fixada por Implante
4.
Artigo em Inglês | MEDLINE | ID: mdl-36661884

RESUMO

Previous studies have demonstrated problems with implant-supported overdenture attachments, such as denture base fracture and retention loss of the attachment's nylon insert. In this study, three implants were surgically inserted at the anterior mandibular region of 16 completely edentulous men (mean age: 50 years), divided into two groups depending on the received mandibular complete overdenture: a conventional metal-reinforced framework with prefabricated metal housing (Group I) or a CAD/CAM metal-reinforced framework with custom metal housing (Group II). At 3 months (prostheses loading), 6 months, and 12 months after implant placement, the retention of the mandibular dentures and wear of O-ring attachments were evaluated. Data were collected, tabulated, and statistically analyzed using Student t test. Statistically significant differences were found between the two groups and within the same groups during the evaluation period (P < .05). Attachment housing incorporated within a CAD/CAM implant overdenture can be a better alternative to the manufacturer's metal housing, as it diminishes retention loss and attachment wear over time, thus increasing patient satisfaction and chewing efficiency.


Assuntos
Implantes Dentários , Masculino , Humanos , Pessoa de Meia-Idade , Revestimento de Dentadura , Satisfação do Paciente , Materiais Dentários , Mandíbula , Prótese Dentária Fixada por Implante , Retenção de Dentadura
5.
J Indian Prosthodont Soc ; 22(2): 205-209, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-36511033

RESUMO

Mandibular overdenture is suspected to fracture, especially in the midline and anterior region due to low surface area of coverage and minimum acrylic thickness in addition to attachments pickup holes that weakens the denture. Dentures used to be conventionally reinforced with metal meshwork which cannot be done in a digital workflow. This in vitro report introduces a novel approach of digital overdenture reinforcement using computer-aided design, computer-aided manufacturing, and rapid prototyping technologies. This novel approach provided digital reinforced, stable, and well-adapted overdenture with accurate and easy attachment pickup. Digital reinforced denture has fewer clinical steps with fewer laboratory complications. The newly developed overdenture fabrication techniques have the ability to change the conventional clinical and laboratory workflow from analog to digital. Which grantee standardization of the outcome on both research and clinical work.


Assuntos
Implantes Dentários , Retenção de Dentadura , Prótese Dentária Fixada por Implante , Revestimento de Dentadura , Mandíbula/cirurgia
6.
Prim Dent J ; 11(4): 61-65, 2022 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-36533372

RESUMO

This report describes a digital workflow and two-year follow-up of an immediately loaded implant-retained overdenture using flapless surgery and a computer-aided design/computer-aided manufacturing (CAD/CAM) surgical guide. A prosthetically-driven approach, utilising a three-dimensional (3D) planning software and a CAD/CAM surgical guide, was used to place four implants in the edentulous maxillary arch of a 59-year-old male patient. All four implants were inserted through the surgical guide without raising soft tissue flaps. After placement, the patient was delivered an immediately loaded maxillary overdenture. Surgical implant placement was well tolerated by the patient, who reported no discomfort. Following a four-month period, a new implant-retained maxillary overdenture reinforced by a metal framework was fabricated and delivered to the patient. There were no adverse issues noted with neither the implants nor the maxillary overdenture during the two-year follow up period. The technique using the workflow described in this report may be a predictable and affordable alternative in the restoration of edentulous arches as compared to full-arch fixed restorations.


Assuntos
Implantes Dentários , Boca Edêntula , Cirurgia Assistida por Computador , Masculino , Humanos , Pessoa de Meia-Idade , Revestimento de Dentadura , Prótese Dentária Fixada por Implante , Desenho Assistido por Computador , Implantação Dentária Endóssea/métodos , Cirurgia Assistida por Computador/métodos
7.
J Indian Prosthodont Soc ; 22(3): 249-255, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-36511054

RESUMO

Aim: The aim of this study was to compare the function and coordination of masticatory muscles for patients with two implant-supported mandibular overdenture (ISOD) with that of conventional complete dentures (CCD) using surface electromyography (sEMG). The objectives were to assess the muscle activity (efficiency) and clinical outcome after the transition of CCD patients to ISOD. Setting and Design: This was a crossover study. Materials and Methods: This clinical trial was conducted in the department of prosthodontics. A total of 15 patients (nine males and six females) were assessed using sEMG. In each patient, a total of four surfaces were examined above the following muscles - right and left masseter and right and left temporalis muscles. The electromyography readings were recorded to assess muscle activity during Clenching, cotton roll clenching, and chewing. The readings were recorded first for CCD and then for ISOD (after installing attachments). Statistical Analysis Used: Data analysis was done using independent t-test and one-way ANOVA. Results: Mean muscular activity of masseter during clenching, cotton roll clenching, and chewing for patients with ISOD (44.3 ± 11.2 µV, 41.1 ± 13.4 µV, and 45.2 ± 17.5 µV) was higher than CCD (26.0 ± 11.3 µV, 22.6 ± 9.7 µV, and 24.2 ± 9.5 µV). The mean muscular activity of temporalis during clenching, cotton roll clenching, and chewing was also higher with ISOD (47.9 ± 11.2 µV, 45.6 ± 11.9 µV, and 51.0 ± 14.4 µV) than CCD (31.0 ± 12.2 µV, 29.7 ± 15.3 µV and 31.9 ± 14.2 µV). No statistically significant result was found between masseter and temporalis muscle activity on both sides (P < 0.05), indicating symmetrical activity on both the sides. Conclusion: Two-ISODs prove to be a better and efficient treatment modality in rehabilitating edentulous patients as it enhances retention and also increases masticatory muscle activity and chewing efficiency.


Assuntos
Implantes Dentários , Boca Edêntula , Feminino , Humanos , Masculino , Estudos Cross-Over , Prótese Dentária Fixada por Implante , Prótese Total , Revestimento de Dentadura
8.
J Indian Prosthodont Soc ; 22(3): 268-271, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-36511057

RESUMO

Aim: The purpose of this study is to evaluate the retention effectiveness of Molloplast B as a female attachment compared to O rings' in implant supported overdentures. Settings and Design: This systematic review and meta-analysis was evaluated using the Preferred Reporting Items for Systematic Review and Meta-Analysis guidelines. Materials and Methods: Sixteen female part models were divided into two groups: eight female parts made with O ring (Group A) and eight female parts made with Molloplast B (Group B). All of the models were soaked in artificial saliva for 24 h, then, their retention force was measured in Newton using a Universal mechanical testing machine, initially, after 500, after 1000, and after 1500 of loading and dislodging cycles. Statistical Analysis Used: : The statistical analysis was conducted by using one way ANOVA test and Bonferroni test. SPSS Software (SPSS, Version 27, IBM Co., Chicago, IL, USA). Results: After 1500 loading and dislodging cycles, Group B has the highest mean retention force (4.09), followed by Group A, which has a mean retention force of 3.73. Conclusion: Molloplast B with a 2.7 mm diameter ball attachment lost the least amount of retention force after 1500 loading and dislodging cycles.


Assuntos
Implantes Dentários , Retenção de Dentadura , Feminino , Humanos , Prótese Dentária Fixada por Implante , Análise do Estresse Dentário , Revestimento de Dentadura
9.
Int J Implant Dent ; 8(1): 64, 2022 12 09.
Artigo em Inglês | MEDLINE | ID: mdl-36484878

RESUMO

PURPOSE: To assess the implant and prosthesis survival rates, the clinical, radiographical and patient-related outcome measures, and the masticatory performance of maxillary overdentures supported by two implants in patients with an atrophic maxilla. METHODS: In this case series, 15 consecutive patients who were eligible for maxillary implant overdenture therapy, but who had insufficient bone volume to place at least four implants and were unwilling to be treated with reconstructive surgery were asked to participate. After giving consent, participants received two implants in the maxilla under local anaesthesia. After 3 months of osseointegration, a maxillary overdenture with palatal coverage and solitary attachments was fabricated. Implant and overdenture survival, marginal bone level change, clinical outcome measures, masticatory performance and patient-related outcomes were evaluated at baseline and 1 year after overdenture placement. RESULTS: Fourteen out of 15 participants completed the follow-up period of 12 months. Implant and overdenture survival rate were 89.3% and 85.7%, respectively. Change in marginal bone level (- 0.5 ± 0.7 mm), change in probing depth (0.0 ± 1.0 mm), and clinical outcomes were favourable. Masticatory performance and patient-related outcomes improved significantly compared to baseline. Complications were minimal. CONCLUSIONS: Within the limitations of this study, it can be concluded that patients with extreme resorption of the maxilla that are unwilling to be treated with reconstructive surgery, benefit from two-implant maxillary overdentures retained by solitary attachments in terms of improved masticatory functioning and denture satisfaction. However, they have relatively high risk of implant loss. TRIAL REGISTRATION: UMCG Trial Register (RR201900060), registered 22 January 2019.


Assuntos
Implantes Dentários , Arcada Edêntula , Humanos , Arcada Edêntula/cirurgia , Retenção de Dentadura , Prótese Dentária Fixada por Implante , Revestimento de Dentadura , Atrofia
10.
Rev. Odontol. Araçatuba (Impr.) ; 43(3): 54-60, set.-dez. 2022. ilus
Artigo em Inglês | LILACS, BBO - Odontologia | ID: biblio-1381314

RESUMO

The aim of this study is to report a clinical case of a patient with Cushing's syndrome, low self-esteem and need for oral rehabilitation. A 50-year-old female patient with hypercortisolism sought care at School of Dentistry of the Federal University of Minas Gerais. During anamnesis, the patient reported painful symptoms and mobility of the upper and lower teeth. On clinical examination, absence of many teeth were observed, periodontal disease and caries lesions. After discussion of the case, the planning involved the extraction of all teeth, and the preparation of Maxillary Immediate Complete Dentures (ICD's) and Immediate Mandibular Implant-retained Overdenture (IMIO). The treatment proposed allowed the restored aesthetics, phonetics and chewing(AU)


O objetivo desse estudo é relatar um caso clínico de uma paciente com síndrome de Cushing, baixa autoestima e necessidade de reabilitação oral. Paciente do sexo feminino, 50 anos de idade e com hipercortisolismo, procurou atendimento na Faculdade de Odontologia da Universidade Federal de Minas Gerais. Durante a anamnese, a paciente relatou sintomas dolorosos e mobilidade dos dentes superiores e inferiores. No exame clínico, foi observada a ausência de muitos dentes, doença periodontal e lesões cariosas. Após a discussão do caso, o planejamento envolveu a extração de todos os dentes, e o preparo de Prótese Total Imediata maxilar (PTI), e Overdenture Implantorretida Imediata mandibular. O tratamento proposto permitiu que restaurasse a estética, fonética e mastigação(AU)


Assuntos
Humanos , Feminino , Pessoa de Meia-Idade , Síndrome de Cushing , Prótese Total Imediata , Doenças Periodontais , Extração Dentária , Cárie Dentária , Prótese Total , Revestimento de Dentadura , Estética Dentária
11.
Int J Prosthodont ; 35(5): 690-696, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-36511794

RESUMO

PURPOSE: To survey the clinical performance of telescopic-retained removable implant-supported dental prostheses (TR-RISDPs) in edentulous patients, as well as incidental maintenance measures and technical complications. MATERIALS AND METHODS: In this retrospective analysis, the former presence of oral cancer, prosthesis location (maxilla or mandible), and participation in a follow-up program were analyzed as possible factors with an influence on survival and maintenance treatments of the TR-RISDPs and dental implants using Kaplan-Meier estimates. RESULTS: A total of 86 TR-RISDPs (mean follow-up: 4.62 ± 3.24 years; maximum 13.8 years) and 465 implants (mean follow-up: 5.67 ± 3.59 years; maximum 16.5 years) were observed. Six (6.9%) of the TR-RISDPs had to be remade, and 11 (2.3%) implants failed. Regular attendance in the follow-up program showed significantly higher survival times and fewer maintenance treatments for the TRRISDPs (P < .05). Implants in patients with former oral cancer showed significantly lower survival times (P < .001). CONCLUSIONS: TR-RISDPs in edentulous patients show excellent clinical outcomes. Regular check-ups are decisive for success.


Assuntos
Implantes Dentários , Arcada Edêntula , Neoplasias Bucais , Boca Edêntula , Humanos , Prótese Dentária Fixada por Implante/efeitos adversos , Revestimento de Dentadura , Planejamento de Prótese Dentária , Estudos Retrospectivos , Neoplasias Bucais/etiologia , Falha de Restauração Dentária , Seguimentos
12.
J Long Term Eff Med Implants ; 33(1): 83-89, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-36382708

RESUMO

Implants that can be used in the prosthetic rehabilitation of full and partial edentulous patients are now frequently used due to advances in dentistry. The aim of the study is to find the prevalence of implant supported fixed vs. removable prosthesis and associated quality of life evaluation. A cross-sectional, descriptive study was conducted in an institution, on randomly selected individuals. The study group consisted of adult patients who attended the outpatient Department of Prosthodontics from June 2019-March 2020. Eighty-six thousand (86,000) case sheets were evaluated and Chi-square test, independent t-test and frequency analysis were used to explore the relationship between two variables. Out of the patients, 76.5% preferred fixed prosthesis while 23.5% chose removable prosthesis. Females preferred fixed prosthesis over removable. The young-old age group had more removable prosthesis compared to the middle- and elderly age group. Patients with implant supported fixed dental prosthesis had a better quality of life compared with patients with implant supported overdentures. Esthetic and functional rehabilitation is a preferred option females generally care more about their teeth and looks so wanted more fixed options. The young-old age group preferred removable prosthesis over fixed prosthesis. Patients with implant supported fixed dental prosthesis have a better quality of life compared with patients with implant supported overdentures.


Assuntos
Implantes Dentários , Arcada Edêntula , Adulto , Idoso , Feminino , Humanos , Estudos Transversais , Odontólogos , Revestimento de Dentadura , Qualidade de Vida
13.
J Dent ; 127: 104346, 2022 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-36414990

RESUMO

OBJECTIVES: To compare the degree of satisfaction (SD) and the impact on oral health-related quality of life (OHRQoL) of edentulous patients treated with conventional complete dentures (CCDs) and mandibular overdentures (IODs) with a short anteroposterior spread (S-APS) or a large antero-posterior spread (L-APS). MATERIALS AND METHODS: Edentulous patients were treated with CCDs and subsequently randomly allocated to receive a bar clip mandibular overdenture retained by 2 interforaminal implants (Control) or 4 (Test: 2 additional implants distal to the mental foramen). The Oral Health Impact Profile Edent questionnaire (OHIP-20E) and the Visual Analogue Scale (VAS) were applied at a mean follow-up of 38.5 months to assess the impact on OHRQoL and DS, respectively. Comparisons between the type of prosthesis and the extension of the AP spread were made with Student's t test for paired samples and for independent samples, respectively, at a significance level of 5%. RESULTS: The IODs had significantly lower OHRQoL values ​​in the dimensions "functional limitation" (p=0.03), "physical pain" (p=0.02), "psychological discomfort" (p<0.01), "disability physical" (p<0.01) and "general score" (p<0.01) (n=20 patients). The IODs presented DS values ​​significantly for "aesthetics" (p=0.04), "stability" (p=0.03), "masticatory capacity" (p<0.01), "function" (p<0.01) and "oral condition" (p=0.03). The S-APS group (control) resulted in significantly lower values ​​in the dimensions "physical pain" (p<0.01) and "general score" (p<0.01) and no domain with statistical difference in the VAS scale. CONCLUSIONS: IODs significantly improved OHRQoL and DS. The increase in AP spread did not result in benefits for the patient's OHRQOL and DS in this clinical study. (Study Protocol Number: 1.452.492) CLINICAL SIGNIFICANCE: Implantology has experienced in the last 20 years a permanent evolution that aim at increasing predictability and improving long-term clinical performance. Placement of short implants distally to the mental foramen, for instance, and the resulting increase of the anterior-posterior spread, is a promising approach and is worthy of investigation.


Assuntos
Implantes Dentários , Boca Edêntula , Humanos , Revestimento de Dentadura , Qualidade de Vida , Satisfação Pessoal , Prótese Dentária Fixada por Implante , Satisfação do Paciente , Estética Dentária , Boca Edêntula/psicologia , Dor
14.
J Dent ; 127: 104357, 2022 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-36351489

RESUMO

OBJECTIVES: To evaluate the benefits of implant therapy for patients with diabetes, we compared (i) healthy, (ii) well controlled T2DM and (iii) poorly controlled T2DM patients, in terms of oral health-related quality of life (OHRQoL) and satisfaction with mandibular 2-implant overdentures over 12 months following restoration. MATERIALS AND METHODS: This single-center, prospective, cohort study recruited 165 edentulous adults (HbA1c<12%) to receive two endosseous implants in the anterior mandible to support mandibular overdentures. Participants were enrolled as having T2DM or not, with T2DM participants divided according to HbA1c into well-controlled (<8.1%) and poorly controlled (≥ 8.1%) groups. Participants provided responses to the OHIP-20 (OHRQoL) and the McGill Denture Satisfaction Questionnaire, before implant therapy and 6 and 12 months after overdenture insertion using Locator attachments. HbA1c was measured at the same time points. The effect of groups and time was verified using generalized estimating equations (α=0.025). RESULTS: At 12 months, 137 participants provided responses. The two diabetes groups showed improvements in OHRQoL to the same extent as the non-diabetic control group at both 6 and 12 months. Patient satisfaction showed similar improvements with no between-group differences and similar increases identified at 6 and 12 months. HbA1c was not affected by time or groups. CONCLUSIONS: Dental implant therapy provided significant improvements in patient-perceived benefits of mandibular two-implant overdentures for T2DM individuals, which are similar to those found for healthy edentulous individuals. Importantly, those benefits extend to those individuals with poorly controlled glycaemia. The addition of 2-implant supported mandibular overdentures did not affect glycaemic status over 12 months following insertion. CLINICAL SIGNIFICANCE: As risks for implant therapy relative to glycaemic status are better understood, this study documents that implant therapy may offer important benefits in QoL for T2DM patients independent of glycaemic status.


Assuntos
Implantes Dentários , Diabetes Mellitus Tipo 2 , Arcada Edêntula , Boca Edêntula , Humanos , Revestimento de Dentadura , Qualidade de Vida , Estudos Prospectivos , Satisfação Pessoal , Estudos de Coortes , Prótese Dentária Fixada por Implante , Satisfação do Paciente , Mandíbula , Retenção de Dentadura
15.
J Contemp Dent Pract ; 23(7): 695-702, 2022 Jul 01.
Artigo em Inglês | MEDLINE | ID: mdl-36440515

RESUMO

AIM: The purpose of the study was to evaluate the stress on the implant and to assess the denture displacement for locator and bar and clip attachment types in implant-assisted obturators. MATERIALS AND METHODS: A maxillary edentulous experimental model with a maxillectomy defect was made along with an opposing edentulous mandibular model with self-cure acrylic. Two endosseous implants were placed in the maxillary model. Corresponding obturator complete denture was fabricated for the maxillary model and a complete denture for the mandibular. The attachments were positioned on the implants in maxillary model, and their sleeve/clip was placed on intaglio surface of the dentures. The mounted articulator was placed on a loading apparatus, and force was incrementally applied to it. The strain and displacement for both the attachment types were measured and compared using Digital Image Correlation (DIC). RESULTS: Locator attachment showed the least stress and minimal displacement as compared to bar and clip attachment. CONCLUSION: The stresses around the implants and displacement of the obturator are affected by the attachment type used. It was found that bar and clip (splinted) showed the maximum stresses around the implant and maximum denture displacement. Locator attachment is the better choice over bar and clip because of its additional retentive features. CLINICAL SIGNIFICANCE: The advantage of using DIC over the conventional strain gauge analysis is that a full-field data of displacement and strain can be obtained instead of getting a mean value on the small surface where the strain gauge is positioned.


Assuntos
Revestimento de Dentadura , Boca Edêntula , Humanos , Retenção de Dentadura , Prótese Dentária Fixada por Implante , Dacarbazina
16.
Int J Oral Maxillofac Implants ; 37(6): 1195-1201, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-36450025

RESUMO

PURPOSE: To compare the axial and nonaxial retention forces of different milled bar attachment designs for maxillary implant overdentures. MATERIALS AND METHODS: Four implants were placed in the canine and second premolar areas of an edentulous maxillary ridge model and connected to a cobalt-chromium milled bar either with or without Locator attachments. According to the type of bar and overlying housing, the following groups (n = 10 each) were investigated: group 1 (MWM) = milled bar without attachments and metal housing; group 2 (MWP) = milled bar without attachments and PEEK housing; group 3 (MAM) = milled bar with Locator attachments and metal housing; and group 4 (MAP) = milled bar with Locator attachments and PEEK housing. Axial and nonaxial (anterior, posterior, and lateral) retention forces were measured both at baseline and after wear simulation, then compared between groups and dislodging directions. RESULTS: MAM showed the highest axial (53.20 ± 2.28 N) and nonaxial (anterior [33.80 ± 1.48 N], posterior [37.60 ± 2.07 N], and lateral [34.40 ± 1.67 N]) retention forces at baseline, followed by MAP, then MWM, and MWP (P < .001). MAP showed the highest axial (42.80 ± 2.28 N) and nonaxial (anterior [24.00 ± 1.58 N], posterior [29.40 ± 2.07 N], and lateral [27.80 ± 1.64 N]) retention forces after wear simulation, followed by MAM, then MWP, and finally MWM (P < .001). MAM showed the highest axial (25.25 ± 2.45 N) and nonaxial (anterior [28.29 ± 4.03 N], posterior [24.40 ± 3.25 N], and lateral [25.55 ± 1.65 N]) retention loss, followed by MWM, then MAP, and finally MWP (P < .001). For all groups, the highest retention forces were noted with axial dislodging, followed by posterior dislodging, then lateral dislodging, and finally vertical dislodging (P < .001). CONCLUSION: Milled bars with PEEK housings and Locator attachments for maxillary implant overdentures were associated with the highest axial and nonaxial retention forces after wear simulation, while milled bars with metal housing and no attachments showed the lowest forces. Milled bars with metal housing and attachments showed the highest retention loss, while milled bars with PEEK housing with no attachments showed retention gain.


Assuntos
Implantes Dentários , Boca Edêntula , Humanos , Revestimento de Dentadura , Projetos de Pesquisa
17.
Gerodontology ; 39(4): 425-428, 2022 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-36218242

RESUMO

OBJECTIVE: To report on the use of a mandibular 3-implant overdenture with a novel implant distribution opposing a maxillary complete denture for the rehabilitation of an older edentulous patient. BACKGROUND: The use of oral implants with attachment systems of various numbers and designs to support removable partial and complete dentures is well documented with success and predictability. MATERIALS AND METHODS: An older edentulous patient with a mandibular implant-assisted removable partial denture was presented with failing remaining dentition. Teeth were extracted and a single midsymphyseal implant was placed. A mandibular overdenture on three implants with ball attachments in a tripod distribution was constructed to oppose a new maxillary complete denture made using a modified impression technique. RESULTS: Over 2 years of follow-up, no significant biological or mechanical complications were reported, and denture retention and stability remained optimum. CONCLUSION: Mandibular overdentures on three implants with ball attachments in a tripod distribution, opposing a maxillary complete denture, could be an alternative treatment option for the older edentulous patients.


Assuntos
Implantes Dentários , Boca Edêntula , Humanos , Revestimento de Dentadura , Retenção de Dentadura , Prótese Dentária Fixada por Implante/métodos , Mandíbula , Prótese Total Inferior
18.
Artigo em Inglês | MEDLINE | ID: mdl-36305928

RESUMO

Mini dental implants (MDIs) are an affordable alternative for overdentures in medically compromised patients with reduced bone volume. This human study reports the histomorphometric analysis of early loaded and flaplessly placed tapered, one-piece MDIs (ILZ, Southern Implants; Sa: 1.5 µm) after 7 to 11 months in function. Patients agreed to have an additional MDI placed and removed for evaluation. MDI stability was assessed via Periotest prior to implant removal. Histologic sections of four mandibular and three maxillary MDIs with surrounding bone were processed, and the bone-to-implant contact (BIC) was analyzed. At retrieval, the MDIs were in function for more than 6 months, were clinically healthy, and had mean probing pocket depths of 1.4 mm and 1.6 mm in the maxilla and mandible, respectively. Periotest values were < 5.5, indicating clinical stability. Most of the screw threads were filled with bone and revealed an intimate BIC, without any signs of intervening fibrous tissue layer. In both arches, the mean BIC was 68.5%. Large osteocytes could be identified in the calcified tissue, indicative of mature peri-implant bone. It can be concluded that MDIs, when loaded within 2 weeks in either arch, provide proper clinical stability and high BIC after 6 months.


Assuntos
Implantes Dentários , Revestimento de Dentadura , Humanos , Mandíbula/cirurgia , Maxila/cirurgia , Prótese Dentária Fixada por Implante , Osseointegração , Planejamento de Prótese Dentária , Implantação Dentária Endóssea
19.
J Med Life ; 15(8): 1031-1037, 2022 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-36188643

RESUMO

This study aimed to assess the perception of dentists on the complications associated with prosthodontic treatments with acrylic dentures and overdentures in partially or complete edentulous patients. The study analyzed the complications of acrylic dentures and overdentures using a questionnaire with 24 open or closed questions, with single or multiple answers. The participants were 63 dentists, mostly women (77.8%), aged between 30 and 39 years old (52.4%), more than half of them with a clinical experience of less than 15 years. The main complications encountered were: lesions of the oral mucosa (52.4%), lack of maintenance (44.4%) or stability of dentures (39.7%), fracture of acrylic bases (14.3%), and detachment of attachment systems (44.4%). The complete maxillary acrylic dentures fractured most often (38.1%), frequently on the midline (58.7%), the main causes being accidental fall, masticatory stress, or lack of stability of the dentures. The most common intervention to correct the complications of dentures was the repair of fractured acrylic bases (33.3%). The study exposed that dentists are aware of the possible complications of acrylic dentures, which they correlate with the peculiarities of oral structures, but also with some deficiencies of prosthodontic restorations, materials and technologies. Maxillary acrylic dentures, overdentures, and partial acrylic dentures have a high risk and fracture rate, but the use of new technologies and materials can reduce the complications rate of acrylic dentures and overdentures.


Assuntos
Implantes Dentários , Revestimento de Dentadura , Adulto , Atitude , Prótese Dentária Fixada por Implante , Odontólogos , Prótese Total , Feminino , Humanos , Masculino , Satisfação do Paciente , Percepção
20.
Av. odontoestomatol ; 38(4): 143-150, oct.-dic. 2022. ilus, tab
Artigo em Espanhol | IBECS | ID: ibc-214557

RESUMO

La sobredentadura retenida por dos implantes es una opción para la rehabilitación del edentulismo, pero no se ha estudiado a profundidad su efecto sobre el mantenimiento de la altura del reborde alveolar posterior. El objetivo de este trabajo fue determinar los cambios en altura del reborde alveolar posterior mandibular después de 7 años del uso de una sobredentadura mandibular. Este estudio descriptivo consideró 17 pacientes. Cada paciente había recibido una sobredentadura mandibular retenida por dos implantes no ferulizados cargados de forma inmediata y unidos mediante ajustes en bola. Se realizaron mediciones en dos radiografías panorámicas (una tomada antes de la inserción de la sobredentadura [T0] y otra siete años después [T7]),para los trazos, el área se expresó como un triángulo posterior formado por el gonion, el borde inferior del agujero mental y un punto que fue el centro del triángulo gonion - foramen mental - muesca sigmoidea. El área medida se comparó con el área triangular en el mismo lado.Los resultados en mm con significancia estadística (p< 0.05) fueron: área de referencia ósea “X”( [T0]:494.3- [T7]:431.6) área de referencia ósea izquierda ([T0]:502.0 -[T7]:405.3) y el índice de área posterior([T0]:1.4-[T7]:1.2).Los resultados en mm sin significancia estadísticas(p>0.05)indicaron: área de referencia ósea “X” derecha([T0]:486.1 - [T7]:458.0), área de referencia en “Y” izquierda ([T0]:354.8-[T7]:360.6), derecha ([T0]:361.9-[T7]:375.6) y promedio de longitud del reborde maxilar ([T0]:35.4-[T7]:36.9). La reabsorción del reborde alveolar posterior a los 7 años estuvo dentro de los parámetros normales, no existiría ningún efecto nocivo de la sobredentadura sobre este reborde. (AU)


The overdenture retained by two implants is an option for the rehabilitation of edentulism, but its effect on the maintenance of the posterior alveolar ridge has not been studied in depth.The objective of this work was to determine the changes in height of the mandibular posterior alveolar ridge after 7 years of the use of a mandibular overdenture. This descriptive study considered 17 patients. Each patient had received a mandibular overdenture retained by two non-splinted implants immediately loaded and joined by ball adjustments. Measurements were made in two panoramic radiographs (one taken before the insertion of the overdenture [T0] and another seven years later [T7]), for the lines the area was expressed as a posterior triangle formed by the gonion, the lower edge of the mental hole and a point that was the center of the gonion triangle - mental foramen - sigmoid notch. The measured area was compared to the triangular area on the same side. The results in mm with statistical significance (p< 0.05) were: bone reference area “X”( [T0]:494.3- [T7]:431.6) left bone reference area ([T0]:502.0 -[T7]: 405.3) and the posterior area index ([T0]:1.4-[T7]:1.2). The results in mm without statistical significance (p>0.05) indicated: right “X” bone reference area ([T0]:486.1 - [T7]:458.0), left “Y” reference area ([T0]:354.8-[T7]:360.6), right ([T0]:361.9-[T7]:375.6) and average ridge length maxilla ([T0]:35.4-[T7]:36.9). The resorption of the alveolar ridge after 7 years was within normal parameters, there would be no harmful effect of the overdenture on this ridge. (AU)


Assuntos
Humanos , Masculino , Feminino , Adulto , Pessoa de Meia-Idade , Idoso , Processo Alveolar , Prótese Dentária Fixada por Implante , Projeto do Implante Dentário-Pivô , Revestimento de Dentadura , Radiografia Panorâmica , Epidemiologia Descritiva
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA
...