Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 18.576
Filtrar
1.
Rev. Odontol. Araçatuba (Impr.) ; 42(2): 35-41, maio-ago. 2021.
Artículo en Portugués | LILACS, BBO - Odontología | ID: biblio-1252912

RESUMEN

O objetivo deste estudo é realizar uma revisão da literatura para identificar os principais fatores que levam às complicações em implantodontia. Os implantes osseointegráveis e sua aplicação na odontologia revolucionaram a reabilitação oral de pacientes sejam eles edêntulos totais ou parciais em busca de recuperação funcional e satisfação estética. A pesquisa científica em uma busca constante pela magnificação deste tratamento, possibilitaram o uso de reabilitações implantossuportadas como um método de tratamento previsível com um índice elevado de sucesso. No entanto, como qualquer modo de tratamento, complicações e falhas também podem ocorrer na implantodontia. Após a revisão de literatura pode-se concluir que as condições médicas do paciente, hábitos sociais e parafuncionais, inexatidão do planejamento cirúrgico e protético, conhecimento técnico e científico do cirurgião-dentista, a falta de relacionamento interdisciplinar e deficiente cooperação do paciente no pós-operatório, podem estar relacionadas às complicações no tratamento reabilitador com implantes dentários(AU)


The objective of this study is to carry out a complete literature review to elucidate and evaluate the factors that lead to complications in implantology. The osseointegrated implantsimplants and their application in dentistry have revolutionized the oral rehabilitation of patients who need this treatment, be they total or partial edentulous in search of functional recovery and aesthetic satisfaction. Scientific research and a constant search for the magnification of this treatment, allowed the use of implant-enhanced rehabilitation as a predictable treatment method with a high success rate. However, like any treatment mode, complications and failures can also occur in implantology. the patient's medical conditions, social and parafunctional habits, inaccuracy of surgical and prosthetic planning, technical and scientific knowledge of the dental surgeon, lack of interdisciplinary relationship and poor patient cooperation in the postoperative, may be related to complications in rehabilitating treatment with dental implants(AU)


Asunto(s)
Implantes Dentales , Implantes Dentales/efectos adversos , Implantación Dental Endoósea , Tabaquismo , Prótesis Dental de Soporte Implantado , Diabetes Mellitus , Difosfonatos , Periimplantitis , Rehabilitación Bucal
2.
Shanghai Kou Qiang Yi Xue ; 30(2): 135-139, 2021 Apr.
Artículo en Chino | MEDLINE | ID: mdl-34109350

RESUMEN

PURPOSE: To compare the accuracy of implant placement between modified and traditional immediate implant placement in mandibular molar regions. METHODS: Twenty-four patients were selected for immediate implantation in the molar area including 24 implantation sites. Preoperative cone-beam CT(CBCT) was conducted and then digital software Simplant 18.0 was used to design the ideal three-dimensional position of the implants. In the experimental group, the implant socket was prepared first according to reference of the remaining natural teeth, then the implant was implanted after minimally invasive extraction. Twelve patients in the control group underwent immediate implantation by traditional immediate implant procedures. Minimally invasive extraction, then socket preparation, and final implanting were performed. All patients underwent CBCT after surgery. Implant sites designed prior to surgery and actual implant sites differences between modified and traditional immediate implant placement were measured by Simplant 18.0 and compared with SPSS 17.0 software package. RESULTS: In the experimental group and control group, the measured average deviation were as follows, the angle was (4.492±0.912)° and (7.255±1.307)°, respectively; The horizontal error of the implant shoulder was (0.379±0.083) mm and (1.229±0.270) mm, respectively; The measuring horizontal error of the implant apex was (1.263±0.267) mm and (2.183±0.264) mm, respectively; The calculative horizontal error of the implant apex was (1.324±0.203) mm and (2.709±0.383) mm, respectively; Depth error of the implant apex was (0.663±0.123) mm and (1.533±0.155) mm, respectively, which were significantly lower than those of the control group. CONCLUSIONS: Compared with the traditional method, modified immediate implantation can improve the accuracy of implantation in mandibular molars.


Asunto(s)
Implantes Dentales , Boca Edéntula , Cirugía Asistida por Computador , Tomografía Computarizada de Haz Cónico , Implantación Dental Endoósea , Humanos , Diente Molar/diagnóstico por imagen
3.
Shanghai Kou Qiang Yi Xue ; 30(2): 196-200, 2021 Apr.
Artículo en Chino | MEDLINE | ID: mdl-34109362

RESUMEN

PURPOSE: The aim of this study was to analyze the feasibility of zygomatic implant quad approach in patients with tooth agenesis. METHODS: Based on the data from cone-beam CT (CBCT), twenty one patients with tooth agenesis who were planned to receive zygomatic implant quad approach were enrolled. The radiographic bone-to-implant contact (rBIC) of each zygomatic implant placed virtually in patients' zygomatic segment was measured. SPSS 25.0 software package was used for statistical analysis. RESULTS: Twenty patients' plans of zygomatic implant quad approach were completed (12 men and 8 women). A total of 80 zygomatic implants were placed virtually and the average rBIC of zygomatic segment was (13.85±3.29) mm. The rBIC values of 40 mesial zygomatic implants and 40 distal zygomatic implants were (13.80±3.74) mm and (13.90±2.81) mm, respectively(P>0.05). The average rBIC in male of 24 mesial zygomatic implants and 24 distal zygomatic implants were(14.21±4.08) mm and(14.31±3.18) mm, respectively, slightly higher than those in female of 16 mesial zygomatic implants and 16 distal zygomatic implants, which were (13.18±3.18) mm and (13.29±2.10) mm, respectively. There was no significant difference between the two groups (P>0.05). The average rBIC of 15 extra sinus zygomatic implants, 46 against sinus lateral wall zygomatic implants and 19 intra-sinus zygomatic implants were (16.27±2.95), (13.87±3.10) and (11.88±2.78) mm, respectively. There was significant difference between the extra sinus zygomatic implants and the other two(P<0.05). CONCLUSIONS: It is feasible to plan zygomatic implant quad approach for patients with tooth agenesis. Zygomatic implants can get adequate rBIC in zygomatic segment and to provide sufficient support and retention of the superstructure.


Asunto(s)
Implantes Dentales , Cigoma , Tomografía Computarizada de Haz Cónico , Implantación Dental Endoósea , Prótesis Dental de Soporte Implantado , Estudios de Factibilidad , Femenino , Humanos , Masculino , Maxilar/cirugía , Cigoma/diagnóstico por imagen , Cigoma/cirugía
4.
Shanghai Kou Qiang Yi Xue ; 30(2): 214-218, 2021 Apr.
Artículo en Chino | MEDLINE | ID: mdl-34109366

RESUMEN

PURPOSE: To investigate the 5-year survival and complication rates of implants placed in grafted sinuses with different surgical approaches and analyze the causes for failure. METHODS: This study retrospectively observed the prognosis of patients who underwent maxillary sinus augmentation by means of lateral window technique(LWT) or transalveolar osteotomy technique (TOT) and simultaneously installed implants performed, in Hefei Stomatological Hospital. The primary predictor variables were surgical approaches, including LWT and TOT. The primary outcome measurement was the 5-year implant survival rate, complication rates and failure causes. Potential confounders included diabetes, age at surgery, gender, smoking habit, oral hygiene, tooth position, length and diameter of implants and type of prosthesis. Chi-square test and logistic regression analysis were performed with SPSS 21.0 software package. RESULTS: Fifty-nine patients (31 males and 28 females), installed with 93 implants, with a mean age of (61.3±10.1) years old, were enrolled. Over (5±1.2) years of follow-up, five implants failed, with a total survival rate of 94.6%. In detail, there were 3 failed implants in the LWT group and 2 failed implants in the TOT group, for a survival rate of 85.7% and 97.2%, respectively. Chi-square test showed that smoking habit (P=0.010), oral hygiene(P=0.037) as well as operative approach(P=0.040) were significantly associated with the final survival rates, multivariate logistic regression analysis displayed that smoking habit (OR=0.030, 95%CI: 0.002-0.493, P=0.014) was still associated with the finial survival rates. Surgical approach(P=0.025) was markedly related to causes for the failed implants. Of which, three (100%) failed implants in the LWT group was due to poor osseointegration and implant mobility 3 months after sinus augmentation, and 2(100%) in the TOT group was because of persistent peri-implantitis and loss of the graft or alveolar bone 4 years after sinus augmentation. Smoking habit was also significantly relevant to complication rates(P=0.014), and the occurrence incidence of controllable peri-implantitis in patient having a smoking habit was relatively higher, accounting for 6.8%(6/88), compared with patients without smoking habit. Significant relationship between surgical approaches and implant complications was not observed(P=0.051). CONCLUSIONS: Different surgical approaches for maxillary sinus augmentation do not significantly correlate with implant survival rates and implant complications. However, surgical approach is markedly related to the causes of failed implants. Smoking will lead to a decreased implant survival rate and controllable peri-implantitis.


Asunto(s)
Implantes Dentales , Elevación del Piso del Seno Maxilar , Anciano , Implantación Dental Endoósea , Fracaso de la Restauración Dental , Femenino , Estudios de Seguimiento , Humanos , Masculino , Maxilar/cirugía , Seno Maxilar/cirugía , Persona de Mediana Edad , Estudios Retrospectivos , Elevación del Piso del Seno Maxilar/efectos adversos , Resultado del Tratamiento
5.
Artículo en Inglés | MEDLINE | ID: mdl-34076630

RESUMEN

This study evaluated a panel of clinical, dimensional, volumetric, implant-related, histomorphometric, and patient-reported outcome measures (PROMs) following reconstruction of dehiscence defects in extraction sockets with a minimally invasive technique using particulate bone allograft and a nonresorbable dense polytetrafluoroethylene (dPTFE) membrane. Subjects (n = 17) presenting severe buccal dehiscence defects at the time of single-rooted tooth extraction participated in the study. The mean vertical dimension of the dehiscence defects at baseline was 5.76 ± 4.23 mm. Subjects were followed up at 1, 2, 5, and 20 weeks postoperatively. The dPTFE barrier was gently removed at 5 weeks. CBCT and intraoral scans were obtained at baseline and at 20 weeks. A bone core biopsy sample was harvested at 24 weeks (before implant placement). Linear radiographic measurements revealed a mean increase in buccal bone height from baseline to 20 weeks (5.66 ± 5.1 mm; P < .0001). A total alveolar bone volume gain of 9.12% was observed. Although approximately half of the sites required some degree of additional bone augmentation at the time of implant placement, all implants were placed in a favorable restorative position with adequate primary stability. Histomorphometric analyses revealed a mean mineralized tissue area of 31.04% ± 15.22%, and the proportions of remaining allograft material and nonmineralized tissue were 16.23% ± 10.63% and 52.71% ± 9.53%, respectively. All implants survived up to 12 months after placement. PROMs were compatible with minimal discomfort at different postoperative stages and a high level of overall satisfaction upon study completion. This study demonstrated that the reconstructive procedure employed was successful and predictable in treating large, postextraction alveolar ridge deformities to optimize tooth replacement therapy with implant-supported prostheses.


Asunto(s)
Pérdida de Hueso Alveolar , Aumento de la Cresta Alveolar , Pérdida de Hueso Alveolar/cirugía , Proceso Alveolar/diagnóstico por imagen , Proceso Alveolar/cirugía , Trasplante Óseo , Implantación Dental Endoósea , Humanos , Extracción Dental , Alveolo Dental/diagnóstico por imagen , Alveolo Dental/cirugía , Trasplante Homólogo
6.
Artículo en Inglés | MEDLINE | ID: mdl-34076632

RESUMEN

Achieving primary stability is a critical challenge presented by immediate implant therapy. Surgeons often utilize wider, tapered implants for this purpose, or they use longer implants to achieve primary stability. Both strategies are associated with negative ramifications. Prosthetically guided implant placement must respect biologic principles, such as tooth-implant and implant-implant distance, gap space between the implant and the facial cortex, and, when possible, screw-retention of the prosthesis. A novel implant design geared toward achieving a predictable level of primary stability while adhering to the aforementioned physiologic principles was recently introduced. Both primary and secondary implant stability, along with hard and soft tissue stability, are demonstrated in this study of 107 consecutively placed implants. Rotational and axial stability can be produced with this newly designed implant, along with predictable osseointegration and tissue preservation.


Asunto(s)
Implantes Dentales de Diente Único , Implantes Dentales , Implantación Dental Endoósea , Diseño de Prótesis Dental , Humanos , Oseointegración , Extracción Dental , Alveolo Dental/cirugía
7.
Artículo en Inglés | MEDLINE | ID: mdl-34076634

RESUMEN

This article describes a novel approach for horizontal guided bone regeneration (GBR) using a dehydrated amnion/chorion membrane (dHACM) in conjunction with a composite mixture of cortical autogenous particulate bone scrapings and mineralized bovine bone particulate in the anterior maxilla, allowing for placement of dental implants in a previously deficient alveolar ridge. The grafted region was reentered 8 months after GBR surgery, and a substantial increase in horizontal bone width was observed. Endosseous dental implants were placed with excellent primary stability in a prosthetically driven manner (which could not have been done prior to GBR) and successfully restored with a screw-retained bridge prosthesis. To the authors' knowledge, this is the first reported documentation of successful horizontal GBR using dHACM with subsequent implant placement and restoration, and the first to demonstrate the excellent clinical potential of this biomaterial.


Asunto(s)
Aumento de la Cresta Alveolar , Implantes Dentales , Amnios , Animales , Regeneración Ósea , Trasplante Óseo , Bovinos , Corion/diagnóstico por imagen , Implantación Dental Endoósea , Regeneración Tisular Guiada Periodontal , Humanos
8.
Artículo en Inglés | MEDLINE | ID: mdl-34076636

RESUMEN

Implant-supported restorations have proven to be a predictable option for replacing missing teeth. In cases of inadequate bone quantity, the bone volume can be increased by bone augmentation procedures. Several factors can affect bone regeneration, including the morphology of the defect at the implant site. A defect surrounded by bony walls (an intraosseous defect) is known to yield a highly successful regeneration. The purpose of this retrospective case series study was to present a new step-by-step surgical procedure known as the Custom Alveolar Ridge-Splitting (CARS) technique for maxillary anterior ridge augmentation. This technique creates an intraosseous defect while splitting and augmenting an atrophic ridge. Sixteen consecutive cases were treated with the CARS procedure. All implants were restored and followed for 12 to 24 months after loading, and all cases were effectively treated with successful implant placement. According to this retrospective study, the CARS procedure is simple, successful, and predictable and may be used as a surgical option for horizontal alveolar ridge augmentation in the anterior maxilla.


Asunto(s)
Aumento de la Cresta Alveolar , Maxilar , Proceso Alveolar/cirugía , Trasplante Óseo , Implantación Dental Endoósea , Humanos , Maxilar/cirugía , Estudios Retrospectivos
9.
Artículo en Inglés | MEDLINE | ID: mdl-34076639

RESUMEN

In dental implant surgery, bone grafts are used for the reconstruction and reestablishment of alveolar bone volume and to improve bone architecture for better positioning of an implant. The present report describes the use of the bone ring technique for vertical and horizontal bone augmentation with simultaneous implant placement. This is a simple technique for acquiring donor bone in a ring shape and performing 3D reconstruction of bone defects, with an increase in the alveolar crest, using autogenous bone in a surgical procedure together with implant placement. Block bone grafts taken from the mentum can be used for predictable bone augmentation of up to 6 mm in the horizontal and vertical dimensions. The thickness of the bone ring collected from the mentum is very important. It cannot be too thin due to the risk of fracture, nor can it be too thick, as its contour could become deformed when placed in the receptor site. For stabilization and synthesis, a horizontal mattress suture is performed at the receptor site without promoting tension, and simple sutures are used for the complete co-optation of the flap and consequent stabilization of the clot. In the present type of bone defect, single-stage implant placement may be useful to shorten the overall treatment period.


Asunto(s)
Aumento de la Cresta Alveolar , Implantes Dentales , Proceso Alveolar , Trasplante Óseo , Implantación Dental Endoósea , Humanos
10.
Artículo en Inglés | MEDLINE | ID: mdl-34076642

RESUMEN

The aim of this retrospective study was to evaluate the long-term performance of the supercritical CO2 (Supercrit, BIOBank) viral-inactivated bone allografts in maxillary sinus augmentation. Thirty-four consecutive patients underwent 50 maxillary sinus augmentation procedures, and 103 implants were placed. At a mean of 8.8 years after graft surgery, 95 implants were well osseointegrated and functioning. Eight implants failed, and the overall implant survival rate at 10 years was 92.2%. The marginal bone loss averaged 1.2 ± 1.3 mm. Within the limitations of this study, the supercritical CO2 viral-inactivated bone allograft is a valuable bone graft material, achieving long-term satisfying outcomes when used alone.


Asunto(s)
Implantes Dentales , Elevación del Piso del Seno Maxilar , Trasplante Óseo , Dióxido de Carbono , Implantación Dental Endoósea , Fracaso de la Restauración Dental , Humanos , Maxilar/cirugía , Seno Maxilar/diagnóstico por imagen , Seno Maxilar/cirugía , Estudios Retrospectivos
11.
Int J Periodontics Restorative Dent ; 41(3): e121-e128, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-34076648

RESUMEN

The posterior maxilla has traditionally presented a challenge for successful placement of dental implants due to a combination of poor bone quality, ridge atrophy, and pneumatization of the sinus floor following tooth extraction. However, with the successful and predictable surgical outcomes reported in the literature, more clinicians and patients are choosing an implant-supported restoration in the edentulous posterior maxilla. Consequently, sinus elevation and augmentation have gained more popularity. Extensive research has been conducted on types of bone graft materials and implants, less-invasive techniques to perform sinus augmentation, and timing for implant placement for sinus grafting. Despite the predictability of the techniques and biomaterials employed in sinus grafting procedures, intra- and postoperative complications are common. Much of the current literature discusses the local risk factors related to sinus augmentation, with few studies focusing on the patient-related risk factors. The purpose of this review is to identify, evaluate, and discuss the possible management of patient-related risk factors to allow for more predictable maxillary sinus floor augmentation outcomes.


Asunto(s)
Aumento de la Cresta Alveolar , Implantes Dentales , Elevación del Piso del Seno Maxilar , Trasplante Óseo , Implantación Dental Endoósea , Fracaso de la Restauración Dental , Humanos , Maxilar/cirugía , Seno Maxilar/diagnóstico por imagen , Seno Maxilar/cirugía , Factores de Riesgo
12.
Compend Contin Educ Dent ; 42(6): F1-F11, 2021 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-34077670

RESUMEN

Ten keys for successful esthetic-zone single immediate implants encapsulate in an evidence-based manner the treatment planning and replacement of single hopeless teeth in the maxillary anterior sextant. These include two treatment-planning, five surgical, and three prosthetic keys, which, collectively, aim to minimize soft- and hard-tissue complications for an optimal esthetic implant restoration. The Straightforward, Advanced, and Complex (SAC) classification is designed to aid clinicians in the treatment planning of dental implant cases. As per this classification, cases are stratified by the degree of surgical and restorative risk and complexity for both the surgical and prosthetic phases of treatment. A technique-sensitive and skill-demanding task, the replacement of multiple adjacent teeth in the esthetic zone poses significant challenges for clinicians and is considered a complex SAC procedure surgically and restoratively. This article presents a case report on the replacement of multiple adjacent teeth in the esthetic zone, demonstrating the use of 10 key principles to achieve an optimal esthetic outcome.


Asunto(s)
Implantes Dentales de Diente Único , Implantes Dentales , Implantación Dental Endoósea , Estética Dental , Humanos , Maxilar/cirugía
13.
Int J Oral Maxillofac Implants ; 36(3): 423-431, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-34115054

RESUMEN

PURPOSE: Bone density and implant primary stability parameters have been introduced that are based on calculating (1) the average of the instantaneous torque needed to keep the rotation speed of a bone density probe constant while it descends into bone or (2) the integral of the instantaneous torque-depth curve at implant insertion (I), a quantity that is equal to the insertion energy multiplied by a constant. This study aimed to determine how these two quantities are affected by the presence and thickness of a cortical bone layer. MATERIALS AND METHODS: An instantaneous torque-measuring micromotor was used to measure the density of six double-layer polyurethane foam blocks mimicking different cortical/cancellous bone combinations. Twenty measurements per block were collected, averaged, and compared. The insertion torque and the integral (I) of the instantaneous torque-depth curve at implant insertion were recorded when 20 3.75 × 12-mm cylindrical implants were inserted in each of nine blocks, including three single-layer blocks simulating the absence of a cortical layer, under three final cortical (countersink) preparations: 4.0, 3.7, and 3.5 mm. The relationship between the insertion torque, the integral of the instantaneous torque-depth curve at implant insertion (I), cortical thickness, and the final diameter preparation were investigated with regression and best-fit slope analyses. RESULTS: Bone density measurements showed that the average of the instantaneous torque at probing allowed differentiation of five of six different bone classes (hard-hard, hard-normal, hard-soft, normal-normal, normal-soft, soft-soft); the post hoc analysis of variance (ANOVA) comparisons were all statistically significant except for the hard-soft-normal-soft pair. The insertion torque and the integral (I) of the instantaneous torque-depth curve at implant insertion increased proportionally with cortical bone thickness (Pearson's r > 0.96 in all cases). CONCLUSION: When the final preparation varied from 3.7 mm to 3.5 mm, the insertion torque-thickness plot slope did not change significantly, while that of the instantaneous torquedepth curve integral (I)-thickness plot did change, suggesting that the torque-depth curve at implant insertion integral (I) may detect the increase in implant stability consequent to slight anatomical changes or changes in the site preparation protocol better than the insertion torque when measuring the cortical bone layer stress while undergoing insertion. These findings concerning bone density and primary stability should be investigated further using different experimental settings. If confirmed, they might generate improvements in the predictability of implant and prosthetic rehabilitation outcomes.


Asunto(s)
Implantación Dental Endoósea , Implantes Dentales , Densidad Ósea , Análisis del Estrés Dental , Poliuretanos , Torque
14.
Int J Oral Maxillofac Implants ; 36(3): 432-441, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-34115055

RESUMEN

PURPOSE: To undertake a systematic literature review of magnetic resonance imaging (MRI) employed in the three phases of implant-based oral rehabilitation: planning, execution, and follow-up. MATERIALS AND METHODS: MEDLINE (PubMed) and EMBASE bibliographic databases were searched up to January 2020 for studies assessing the use of MRI alone or in connection with CT and/or CBCT in the planning, execution, or follow-up of dental implant placement and/or bone grafting procedures in the maxilla or the mandible. Included studies were also assessed according to the diagnostic imaging efficacy scale presented by Fryback and Thornbury (F&T). RESULTS: The search strategy yielded 10 studies, which were included in the systematic review. Six studies focused on the implant planning phase, one on the immediate follow-up phase, and three on both planning and follow-up. No studies acquired signal from the bone. There was no consensus on the gold standard, MRI sequence, or field strength (T). One study reached F&T level 1, eight reached level 2, and one reached level 3. CONCLUSION: The possible transition from radiography to ionizing-radiation-free imaging through MRI is still a novelty in dentistry and has yet to establish itself as a viable imaging modality suitable for replacing CT and CBCT. More studies are needed on the accuracy of the diverse MRI possibilities when applied for implant planning, execution, and follow-up before this diagnostic method can be considered as a reality for the clinician.


Asunto(s)
Implantes Dentales , Tomografía Computarizada de Haz Cónico , Implantación Dental Endoósea , Estudios de Seguimiento , Imagen por Resonancia Magnética , Mandíbula
15.
Int J Oral Maxillofac Implants ; 36(3): e31-e41, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-34115057

RESUMEN

PURPOSE: The aim of this in vitro study was to evaluate the temperature development of a novel, electropolished drill design during conventional and guided implant osteotomy in comparison to conventional drills under standardized conditions. MATERIALS AND METHODS: Single and sequential 12-mm-deep drilling protocols (guided and unguided) with a conventional (control groups) and novel drill (test groups) were performed in artificial bone blocks under external irrigation. Each drilling protocol was repeated 30 times with drill diameters of 2.2, 2.8, 3.5, and 4.2 mm. Temperature changes were recorded by an infrared camera, and the accumulated thermal energy was calculated. For group comparison, a one-way analysis of variance (ANOVA) and Tukey post hoc test were used with a level of significance set to = .05. RESULTS: The highest temperatures were measured up to 77.9°C for small-diameter drills in the control and test groups. The 3.5-mm and 4.2-mm novel drills showed significantly lower heat generation during guided and unguided osteotomy preparation for single and sequential drilling. The accumulated thermal energy during guided osteotomy preparation was significantly lower with the electropolished drills. CONCLUSION: The drill design has an important impact on heat development during osteotomy, which was most pronounced for guided osteotomy with conventional drills and for small-diameter osteotomies.


Asunto(s)
Implantes Dentales , Calor , Implantación Dental Endoósea , Osteotomía , Temperatura
16.
Int J Oral Maxillofac Implants ; 36(3): 460-467, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-34115059

RESUMEN

PURPOSE: To evaluate the insertion torque at the equicrestal and subcrestal positions of three implant designs in synthetic polyurethane blocks simulating different bone conditions. MATERIALS AND METHODS: Overall, 72 implants with three different designs (two conical and one cylindrical) were inserted at equicrestal and subcrestal positions (-2 mm) into polyurethane blocks simulating the anterior (0.32 g/cm3) and posterior (0.48 g/cm3) regions of the maxilla. The final insertion torque of all implants was measured using a digital torque meter, and the results were evaluated and statistically analyzed. RESULTS: For all implant systems, insertion torque decreased significantly when placed at the subcrestal position (P < .05), except for cylindrical implants placed in the bone blocks with high cancellous density. The implants with higher body conicity and square threads had higher insertion torque values than the cylindrical and conical implants with a lower body conical angle and trapezoidal threads. The implants inserted into higher-density blocks showed greater stability. CONCLUSION: The different implant systems lost insertion torque in a nonuniform manner at the subcrestal position and varied according to bone density. Implant design significantly influenced the initial stability at the equicrestal and subcrestal positions, especially in lower-density bone.


Asunto(s)
Implantación Dental Endoósea , Implantes Dentales , Densidad Ósea , Diseño de Prótesis Dental , Torque
17.
Int J Oral Maxillofac Implants ; 36(3): 468-473, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-34115060

RESUMEN

PURPOSE: The aim of this study was to compare the bone collection capacity of bur drill systems used in implant surgery with different diameters, lengths, and drilling speeds. MATERIALS AND METHODS: This study was performed on bovine ribs. Two bur drill systems were studied: Implantium (Dentium) and Straumann (Institut Straumann). The groups were divided into subgroups according to the bur diameter. As a result, there were four Implantium subgroups (3.3, 3.8, 4.3, and 4.8 mm) and three Straumann subgroups (3.3, 4.1, and 4.8 mm). In addition, for each bur diameter, the bone collection capacities of the drill systems were evaluated at three different drilling speeds (150, 250, and 400 rpm) and two bur lengths (10 and 12 mm). The diameter, length, and speed changes were performed, and the results were compared between the two drill systems. RESULTS: The mean bone weight collected by using the Straumann burs was higher than that of the Implantium burs at each drilling speed and bur length. Using the Straumann system, the different drilling speeds/lengths of the burs had no impact on the bone collection capacity, irrespective of the bur diameter (P > .05). However, the drilling speeds/lengths of the Implantium system resulted in a statistically significant difference in the same diameters (P < .05). CONCLUSION: Both bur systems were suitable for autogenous graft collection for bone grafting in implant surgery, but the Straumann burs were more successful than the Implantium burs.


Asunto(s)
Implantación Dental Endoósea , Implantes Dentales , Animales , Bovinos , Costillas/cirugía
18.
Int J Oral Maxillofac Implants ; 36(3): 474-484, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-34115061

RESUMEN

PURPOSE: To compare the amount of bone expansion, bone density change, and implant primary stability with an osseodensification technique to a conventional drilling protocol. MATERIALS AND METHODS: Twenty-four bovine rib segments (20 × 25 × 4 mm) with a 1-mm outer layer of cortical bone were randomly divided into two groups: an osseodensification group and a conventional drilling group. Each bone sample received one 4.1 × 10-mm implant. The density of the peri-implant bone before and after osteotomy was measured. After implant placement, primary stability was assessed. A laser surface scanner was used before and after implant placement to compare the dimension of crestal bone width and volumetric expansion. Histomorphometric analysis was performed to compare the bone-to-implant contact percentage (BIC%) of the two groups. RESULTS: The peripheral and apical bone mineral density around the implants was significantly increased, and a statistically significantly higher peripheral BIC% was found in the osseodensification group. A significant increase in volume and bone width after implant placement was found in both groups. However, there were no significant differences in volume and bone width change at all three locations and in implant stability between the osseodensification and conventional drilling protocols. CONCLUSION: Within the limitations of this study, the osseodensification protocol increased the bone mineral density and primary bone-to-implant contact. Also, this study suggests that implant placement by osseodensification or conventional drilling can increase ridge dimensions in narrow alveolar ridges.


Asunto(s)
Implantes Dentales , Oseointegración , Proceso Alveolar/diagnóstico por imagen , Proceso Alveolar/cirugía , Animales , Densidad Ósea , Bovinos , Implantación Dental Endoósea , Osteotomía
19.
Int J Oral Maxillofac Implants ; 36(3): 503-519, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-34115065

RESUMEN

PURPOSE: To review the evidence from the clinical outcomes of immediately loaded implants with fixed prostheses in edentulous maxillae. MATERIALS AND METHODS: An electronic search was performed in PubMed/MEDLINE, Embase, and Cochrane to identify studies investigating the outcome of implants subjected to immediate loading with fixed dental prostheses in edentulous maxillae. Only clinical studies with more than 10 patients and a mean follow-up time of more than 12 months were included. Meta-analysis was utilized to compare the clinical outcomes between immediately loaded implants and conventionally loaded implants. For immediately loaded implants, a cumulative implant survival rate (ISR) was weighted by the duration of follow-up and number of implants. The weighted marginal bone loss (MBL) was also assessed. RESULTS: A total of 33 studies (16 retrospective studies and 17 prospective studies) were included, which involved 2,635 patients and 12,480 implants. Meta-analysis did not reveal a significant difference of ISR or MBL between the two loading groups. For immediately loaded implants, the weighted cumulative ISR was 95.53% (median: 97.50%) with a mean follow-up of 46.07 months (SD: 30.92). Fourteen studies reported on the MBL of implants, and the mean MBL was 1.19 mm (SD: 0.88) with a mean period of 57.70 months (SD: 32.56). The results should be interpreted with caution due to the lack of randomized controlled trials (RCTs) and the heterogeneity of the data. CONCLUSION: Despite the lack of RCTs, immediate implant loading with a fixed prosthesis in the edentulous maxilla seems to be a reliable treatment alternative with a high ISR, when appropriate inclusion/exclusion criteria are followed.


Asunto(s)
Implantes Dentales , Carga Inmediata del Implante Dental , Arcada Edéntula , Implantación Dental Endoósea , Prótesis Dental de Soporte Implantado , Fracaso de la Restauración Dental , Estudios de Seguimiento , Humanos , Arcada Edéntula/cirugía , Maxilar/cirugía , Resultado del Tratamiento
20.
Int J Oral Maxillofac Implants ; 36(3): 553-560, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-34115071

RESUMEN

PURPOSE: This study aimed to report a practicable and noninvasive two-stage technique for sinus elevation and delayed implant insertion in the augmented site with residual bone height down to 3 mm or even lower. MATERIALS AND METHODS: The surgical technique employed a two-stage process for rehabilitation of posterior maxillary single-tooth edentulous areas, involving, in the first step, transcrestal maxillary sinus floor augmentation with a collagen sponge to fill the intrabony cavity resulting from the detachment of the sinus membrane; the second step consisted of another indirect sinus floor elevation using magnetoelectric surgery with immediate implant placement and no grafting material. Changes in bone height were evaluated by a comparison of the computed tomography scans acquired before treatment and after surgery (at 3 months and 5 years of the survey). Statistically significant differences between the times and the tooth sites were evaluated by nonparametric statistics (matched and independent), with P < .01. RESULTS: Forty patients were retrospectively selected. The preoperative height of the available alveolar bone was 2.9 ± 0.6 mm. A significant increase in bone height (P < .01) was found for both the first and the second surgery (3.1 ± 0.6 mm and 4.4 ± 0.6 mm, respectively). The overall bone height was measured at 3 years after the first surgery (10.3 ± 0.6 mm). Measurements of the bone height ranked for tooth positions showed no significant difference between premolars and molars. None of the selected patients registered an implant failure. CONCLUSION: Two-stage osteotome-mediated sinus elevation appeared to be a predictable technique that enabled practitioners to increase the bone height and to obtain successful outcomes even if the amount of bone was approximately 3 mm in height.


Asunto(s)
Implantes Dentales , Elevación del Piso del Seno Maxilar , Implantación Dental Endoósea , Estudios de Seguimiento , Humanos , Seno Maxilar/diagnóstico por imagen , Seno Maxilar/cirugía , Estudios Retrospectivos , Tomografía
SELECCIÓN DE REFERENCIAS
DETALLE DE LA BÚSQUEDA
...