Resolución de peri-implantitis en una paciente con múltiples implantes comprometidos. Reporte de caso

El propósito de este reporte es describir el tratamiento no quirúrgico y quirúrgico en una paciente con múltiples implantes con peri-implantitis. Inflamación, sangrado espontáneo, supuración y pérdida ósea fueron los signos clínicos y radiográficos observados en los 21 implantes presentes en su boca. Las profundidades al sondaje oscilaban entre 5 y 15 mm. Se llevó a cabo la terapia no quirúrgica asociada a antibióticos sistémicos (Metronidazol 500 mg) y antiséptico (Clorhexidina 0,12%) con la finalidad de reducir los signos de inflamación y sangrado. Durante la re-evaluación se colocaron gránulos de Minociclina de liberación controlada en las bolsas residuales. Los sitios que no respondieron fueron abordados quirúrgicamente, realizando además la implantoplastia de las espiras que quedaron expuestas al medio bucal. Uno de los implantes debió ser explantado. A los 9 meses, no presentaba signos de inflamación peri-implantar, sangrado al sondaje ni pérdida ósea progresiva.

The aim of this report is to describe the non-surgical and surgical treatment of a patient with multiple implants with peri-implantitis. Inflammation, spontaneous bleeding, suppuration and bone loss were the clinical and radiographic signs observed in the 21 implants present in her mouth. Probing depths ranged from 5 to 15 mm. Non-surgical therapy with systemic antibiotics (Metronidazole 500 mg) and antiseptic (Chlorhexidine 0.12%) was carried out in order to reduce the signs of inflammation and bleeding. During re-evaluation, controlled-release minocycline granules were placed in the residual pockets. The sites that did not respond were approached surgically. Also, the implantoplasty of the threads that were exposed to the oral environment was performed. One of the implants had to be explanted. At 9 months, there were no signs of peri-implant inflammation, bleeding on probing or progressive bone loss.

Niveles bajos de vitamina D y su efecto en la oseointegración: revisión sistemática / Low levels of vitamin D and effect on osseointegration: a systematic review

Introducción: la vitamina D es una hormona que se sintetiza por células de la piel mediante la luz ultravioleta (UV) y se obtiene a través de la dieta. La relación que se establece entre la deficiencia de vitamina D y el fracaso en injertos óseos o implantes se basa en las alteraciones inmunológicas e inflamatorias debido al vínculo que existe con la inmunidad innata y adaptativa. Objetivo: identificar los factores que se presentan en el periodonto cuando existen niveles bajos de vitamina D y se realizan tratamientos periodontales como injertos óseos e implantes. Material y métodos: se realizó la búsqueda primaria de artículos en bases de datos PubMed y Google Académico (en español e inglés), de acuerdo con las palabras claves: deficiencia, vitamina D, implantología y oseointegración. Resultados: la vitamina D afecta y predispone al rechazo de injertos, ausencia de oseointegración en implantes debido a la inmunomodulación. Conclusión: el éxito del tratamiento se vuelve predecible cuando se encuentran niveles óptimos de vitamina D en conjunto con técnicas de abordaje quirúrgico correctas que permitan generar una integración ideal de los tejidos periodontales (AU)

Introduction: vitamin D is a hormone that is synthesized by skin cells using UV light and consumed through the diet. The relationship established between vitamin D deficiency and the failure of bone grafts or implants is based on immunological and inflammatory alterations due to the intimate link with innate and adaptive immunity. Objective: to identify the factors that occur in the periodontium when there are low levels of vitamin D and periodontal treatments such as bone grafts and implants are performed. Material and methods: a search for articles was carried out in PubMed and Google Scholar (Spanish and English). Results: vitamin D affects and predisposes to graft rejection, absence of osseointegration in implants due to immunomodulation. Conclusion: the success of the treatment becomes predictable when optimal levels of vitamin D are found together with the correct surgical approach techniques that allow the generation of an ideal integration of the periodontal tissues.(AU)

Impact of the COVID-19 pandemic on publication rate in periodontology and implantology in Turkey / Impacto da pandemia de COVID-19 na taxa de publicação em periodontia e implantodontia na Turquia

Objective: The aim of the present study was to evaluate the impact of the COVID-19 pandemic on the number of publications in the field of periodontology and implantology in Turkey. Material and Methods: A sensitive search strategy was developed to identify relevant articles, focusing on the periodontology and implantology research fields published two years before and after the declaration of the pandemic (March 2020). The search was performed through Web of Science, Medline, SCOPUS and CENTRAL databases. A three-stage screening (titles, abstract, full-text) was carried out in duplicate and independently by two reviewers. Results: A total of 382 studies were identified before the pandemic and 307 studies during the pandemic. While there was a downward trend in the number of observational studies (185 vs 168), the number of clinical trials (CCT/RCT) slightly increased compared to the pre-pandemic period (72 vs 74). Conclusion: Limited to the selected period of time (two years) and field, publication rate on periodontology and implantology in Turkey was decreased during the pandemic. Although the present research highlights current trends, large-scale investigations are needed to probe consequences of COVID-19 pandemic on research activities in the long-run (AU).

Objetivo: O objetivo do presente estudo foi avaliar o impacto da pandemia de COVID-19 no número de publicações na área de periodontia e implantodontia na Turquia. Material e Métodos:Foi desenvolvida uma estratégia de busca sensível para identificar artigos relevantes, com foco nas áreas de pesquisa em periodontia e implantodontia publicados dois anos antes e depois da declaração da pandemia (março de 2020). A busca foi realizada nas bases de dados Web of Science, Medline, SCOPUS e CENTRAL. Uma triagem de três etapas (títulos, resumo, texto completo) foi realizada em duplicata e de forma independente por dois revisores. Resultados: Foram identificados 382 estudos antes da pandemia e 307 estudos durante a pandemia. Embora tenha havido uma tendência de queda no número de estudos observacionais (185 vs 168), o número de ensaios clínicos (CCT/RCT) aumentou ligeiramente em comparação com o período pré-pandêmico (72 vs 74). Conclusão: Limitada ao período de tempo selecionado (dois anos) e área, a taxa de publicação em periodontia e implantodontia na Turquia diminuiu durante a pandemia. Embora a presente pesquisa destaque as tendências atuais, são necessárias investigações em larga escala para investigar as consequências da pandemia de COVID-19 nas atividades de pesquisa a longo prazo.(AU)

Otimização das etapas de confecção do protocolo Branemark com carga tardia utilizando o guia multifuncional / Optimization of the Branemark protocol late load preparation steps using the multifunctional guide

O "planejamento reverso" em implantodontia busca alcançar um melhor prognóstico para a reabilitação do paciente, permitindo uma maior previsibilidade para o tratamento a partir do momento em que se planeja a reabilitação oral protética antes mesmo de planejar os implantes osseointegráveis. O dispositivo de resina acrílica chamado guia multifuncional representa a disposição final dos dentes na reabilitação e auxilia demasiadamente na etapa protética em casos em que não é possível a carga imediata. Ainda, otimiza o número de consultas do tratamento pois orienta a relação maxilomandibular, dimensão vertical e correta posição dos dentes. O presente trabalho tem como objetivo apresentar um caso clínico da utilização do guia multifuncional para moldagem dos implantes em caso de protocolo Branemark com dois tempos cirúrgicos, mostrando sua utilidade para diminuição do número de consultas na etapa de confecção da prótese total inferior definitiva. Diante dos resultados obtidos na realização do caso, foi possível concluir que nos casos de protocolo Branemark quando não é possível realizar a carga imediata, o guia multifuncional pode ser aproveitado e utilizado com sucesso, para a moldagem e confecção da prótese definitiva, diminuindo o número de consultas e otimizando o tratamento.

Reverse planning in implantology aims to improve patient's rehabilitation prognosis allowing greater treatment predictability from the prosthetic planning and before the implants installation. The acrylic resin device called multifunctional guide represents the final teeth disposition and is very useful in the prosthetic step when immediate loading is not possible. And it optimizes appointments treatment number since it guides the maxillomandibular relation, vertical dimension and correct teeth position. The aim of this study was to present a clinical case using the multifunctional guide for implant molding a two steps Branemark protocol, showing its usefulness to reduce the appointments number during the inferior total denture preparation step. Based on these results, it was possible to conclude that in Branemark protocol, when it immediate loading is not possible, the multifunctional guide can be used successfully for molding and making the final prosthesis, reducing the number of visits and optimizing treatment.

Application of virtual implant restoration in oral implantology teaching / 中华医学教育探索杂志

This study uses "virtual implant" technology combined with PBL and CBL teaching methods to carry out oral implantology teaching with "restoration as the goal". By instructing students to collect preoperative data and compare actual postoperative data, the continuous cycle verification between problems, objectives, methods, and results is performed. The continuous cycle verification can improve the enthusiasm and initiative of students to learn oral implantology. At the same time, it can allow students to develop the thinking habit of understanding oral implantology with a holistic and whole-process concept and provide strong educational guidance for clinical medical students.

Application of plasmatrix in vertical bone augmentation for implant placement / 口腔疾病防治

@#Vertical bone augmentation surgery still faces considerable challenges in clinical practice due to various problems, such as difficulty in restoring the ideal alveolar bone height and biological complications, and because it is highly technically sensitive. Plasmatrix is derived from patients’ own blood, and it can effectively promote the vascularization of the regenerated area, recruit stem cells, and reduce inflammation when used in vertical bone augmentation. Based on studies published worldwide, this article first divides vertical bone augmentation into 3 categories according to the height of the expected alveolar ridge, namely, type Ⅰ, the required vertical bone gain is less than 4 mm; type Ⅱ, the required vertical bone gain is between 4-8 mm; and type Ⅲ, the required vertical bone gain is greater than 8 mm. In the type Ⅰ vertical bone augmentation, the plasmatrix bone block is directly placed in the defect area and covered with the plasmatrix membrane before tension-free suturing; in the type Ⅱ vertical bone augmentation, the plasmatrix bone block should be placed in the defect area and fixed with titanium nails and then covered with an absorbable collagen membrane and plasmatrix membrane with a tension-free suture; in the type Ⅲ vertical bone augmentation, additional active ingredients (such as bone morphogenetic protein, autologous bone, etc.) should be added to the plasmatrix bone block and strong fixation (such as titanium nails) should be used. Absorbable collagen and plasmatrix membranes should be used to cover the surface of the bone block, and the flap should be sutured. According to different types of vertical bone augmentation categories, the above methods optimize the vertical bone augmentation effect. This article aims to provide a reference and guidelines for oral clinicians to fully understand plasmatrix and simplify the classification and operation of vertical bone augmentation.

Association de la Piézographie et de l'implantologie dans la gestion d'un cas d'édentement complet mandibulaire à crête résorbée

Lack of retention and stability are the main complaints in complete removable mandibular dentures due to the continuous bone resorption in edentulous subjects. Several therapeutic alternatives can be recommended in order to improve the prosthetic balance. The piezographic technique proves to be one of the most efficient techniques in these situations. It allows an optimal prosthetic integration in the functional corridor of this prosthesis. Today, the implant solution appears to be a determining factor in the successful treatment of this type of edentulism. It enhances the retention of complete removable mandibular prostheses.In this work, a clinical illustration of a similar case will be treated with a complete mandibular denture using these two therapeutic solutions combined.

Application of plasmatrix in horizontal bone augmentation for implant placement / 口腔疾病防治

@#Tooth loss is accompanied by alveolar bone absorption or defect, resulting in insufficient bone and soft tissue. In addition to restoring the masticatory function of missing teeth, implant treatment should also needs to restore the contour and shape of the dental arch. Guided bone regeneration is a common means of bone increase. Xenogeneic granular bone substitute materials are widely used in the field of clinical bone augmentation due to their advantages of long degradation time and low immunogenicity, but other problems, such as inconvenient operation and low osteogenic activity, remain. Plasmatrix can effectively improve the effect of oral tissue regeneration and reduce the occurrence of postoperative complications, and its application in oral tissue regeneration is gradually increasing. This article first introduces the main application forms of plasmatrix in horizontal bone augmentation (mainly solid plasmatrix membrane and plasmatrix bone block), and reclassifies horizontal bone defects according to commonly used decision-making schemes in clinical bone augmentation, in other words, whether the implant can be placed in the ideal position and whether there is bone dehiscence after implantation. Type Ⅰ defects refers to the situation where the bone at the implant site can allow the insertion of an implant with ideal size, and there is no bone dehiscence around the implant, but the alveolar bone contour is not ideal; type Ⅱ defects refers to the situation that when an ideal size implant is placed at the implant site determined by the future prosthesis position, there will be bones on three sides of the implant, but there is bone dehiscence in the buccal bone wall (the length of bone dehiscence is less than 50% of the implant length); type Ⅲ defects refers to the situation where the bone volume at the implant site is not enough to for the placement of the ideal size implant at the ideal position, and bone grafting is required to restore the bone volume before the implant placement. The application of plasmatrix in different types of bone defects is then described. In type Ⅰ bone defects, the solid plasmatrix membrane is used instead of the collagen membrane; in type Ⅱ bone defects, the bone defect around the implant is filled by plasmatrix bone block and then covered with collagen membrane and solid plasmatrix membrane; and in type Ⅲ bone defects, plasmatrix bone block is used to replace autogenous bone block to fill the defect area, and titanium screws are used for fixation. The defect is then covered with a collagen membrane and a solid plasmatrix membrane. This article aims to provide oral clinicians with a comprehensive understanding of plasmatrix and simplify the guidelines for bone regeneration operations.

Research progress on the design of fixed implant-supported prostheses in edentulous jaws / 口腔疾病防治

@#With the aging of the population and the increase in the number of edentulous patients, implant-supported fixed restorations have become more prevalent in clinical treatment. It is necessary to assess the patient's remaining bone and occlusal situation correctly; the upper jaw usually needs 6 to 8 implants, whereas the lower jaw needs 4 to 6 implants. Patients with severe alveolar bone atrophy can adopt the "all-on-4/6" treatment plan, short implants, and zygomatic and pterygomaxillary implants to avoid complex bone grafting and remain cautious when the surgical procedures require more surgical experience. According to the repair methods, the superstructure can be divided into one-piece repair and segmental repair. One-piece repair has a lower implant number, flexible location, and reasonable stress distribution but a high maintenance cost. Sectional repair easily achieves passive placement, convenient cleaning, and maintenance in the late stages, but implants need quantity and high requirements for alveolar bone. However, the requirements for alveolar bone and implant number are high. Mutually protected occlusion with minimal or no cantilever on provisional prosthesis is recommended.

Demandas por Malpraxis en Distintas Etapas del Tratamiento en Implantología Oral: Una Revisión

RESUMEN: Las demandas por malpraxis en odontología se han incrementado en los últimos años, siendo la implantología una de las especialidades más litigadas. Estas demandas en su mayoría se han caracterizado por tener un carácter multifactorial, con errores reportados en cualquiera de sus fases diagnósticas, terapéuticas o de mantenimiento. El propósito de esta revisión fue establecer la etapa del tratamiento implantológico en la que más se realizaron demandas por malpraxis, estableciendo una categorización de los errores detectados y de los daños asociados a cada una de las fases que incluye el tratamiento de rehabilitación mediante implantes dentales. Se realizó una revisión con búsqueda sistemática de los últimos 10 años en las bases Pubmed, Scopus, Web of Science, SciELO, complementada con una búsqueda manual en revistas especializadas y en Google Scholar de artículos a partir de términos clave en idiomas español inglés y portugués. Se identificaron solo 3 artículos que cumplieron los criterios de selección, lo que afirma el concepto de escasa atención hacia esta eventualidad. Las demandas identificadas en esos reportes fueron analizadas sobre cuatro tipos de riesgo en implantología según la etapa del tratamiento en la que aparecen. La etapa quirúrgica fue identificada como la de mayor potencial de riesgo de originar eventos adversos y demandas asociadas. Se sugiere profundizar en los aspectos medicolegales propios y genéricos de la especialidad, como así también en el desarrollo de estrategias que prevengan sus eventos adversos y la judicialización asociada.

ABSTRACT: Dental malpractice claims have increased in recent years, and implantology is one of the most litigated specialties. Most of these claims have been characterized by having a multifactorial nature, with errors reported in any of their diagnostic, therapeutic or maintenance phases. The purpose of this review was to establish the stage of implant treatment in which the most malpractice claims were made, establishing a categorization of the errors detected and damages associated with each of the phases that includes rehabilitation treatment using dental implants. A review was carried out with a systematic search of the last 10 years in Pubmed, Scopus, Web of Science and SciELO databases, complemented with a manual search in specialized journals and in Google Academic, of articles from key words in Spanish, English and Portuguese languages. Only 3 articles were identified that met the selection criteria, which affirms the concept of scant attention given to this eventuality. The claims identified in these reports were analyzed on four types of risk in implantology according to the stage of treatment in which they appear. The surgical stage was identified as the one with the highest risk potential of causing adverse events and associated demands. It is suggested to deepen the specific and generic medico-legal aspects of the specialty, as well as in the development of strategies to prevent adverse events and the associated litigation.

Influence of bisphosphonates on the behavior of osteoblasts seeded onto titanium discs

Abstract Among other factors, types of bisphosphonates and treatment regimens seem to be strongly associated with the success or failure of installation of osseointegrated implants. This study investigated the influence of two bisphosphonates, sodium alendronate (SA) and zoledronic acid (ZA), on the metabolism of osteoblasts. Human osteoblasts (Saos-2) were seeded onto machined or acid-treated titanium discs previously placed on 24-well plates in complete culture medium. After 24 h, cells were exposed to bisphosphonates at 0.5, 1 or 5 µM for 24 h, 48 h or 7 days. The effects of SA and ZA on osteoblasts were assessed based on the adhesion of these cells to the titanium surfaces by direct fluorescence, cell viability, total protein and collagen synthesis. Alkaline phosphatase activity and mineral nodule deposition by these cells were also evaluated. Data were evaluated by ANOVA and Tukey tests (α=0.05). Decreased adhesion of cells to the titanium discs was observed when exposed to both bisphosphonates; however, this lack of cell adhesion was more evident for ZA-treated cells. In addition, the exposure of osteoblasts to ZA decreased the viability, ALP activity and mineral nodule deposition, which may be related to poor osseointegration after implant installation.

Resumo Entre outros fatores, os tipos de bisfosfonatos bem como os regimes de tratamento parecem estar diretamente associados com o sucesso ou falhas na instalação de implantes osseointegrados. Este estudo avaliou a influência de dois bisfosfonatos, o alendronato de sódio (AS) e o ácido zoledrônico (AZ), no metabolismo de osteoblastos. Osteoblastos humanos (Saos-2) foram cultivados sobre discos de titânio polidos ou submetidos a tratamento ácido superficial, previamente alocados em placas de 24 compartimentos, utilizando meio de cultura completo. Após 24 horas, as células foram expostas aos bisfosfonatos, nas concentrações de 0,5, 1 ou 5 µM, por 24 h, 48 h, ou 7 dias. Os efeitos do AZ e AZ sobre os osteoblastos foram determinados considerando a adesão destas células às superfícies de titânio, por meio de fluorescência direta, a viabilidade celular, produção de proteína total e síntese de colágeno. A atividade de fosfatase alcalina e a deposição de nódulos mineralizados também foram avaliadas. Os dados foram analisados por meio do teste ANOVA complementado por Tukey (α = 0.05). Menor adesão dos osteoblastos foi observada quando estas células foram expostas a ambos os bisfosfonatos, porém, esta falha na adesão foi mais evidente para as células tratadas com AZ. Além disso, a exposição dos osteoblastos ao AZ também resultou em diminuição da viabilidade, atividade de ALP e deposição de nódulos mineralizados, o que pode estar relacionado a uma pobre osseointegração após a instalação do implante.

Revisión Bibliográfica sobre la implantología: causas y complicaciones / Bibliographic review on implantology: causes and complications

RESUMEN La implantología es una rama en constante evolución que cada vez presenta técnicas más rápidas, predecibles y mínimamente invasivas; hoy en día es una solución bastante completa para aquellas personas que por distintos motivos han perdido una o más piezas dentales y ha traído grandes avances en el área odontológica. Los avances científicos y tecnológicos, así como la mejora de la praxis quirúrgica, han logrado que la tasa de éxito de los implantes dentales sea superior al 95% después de un año de la colocación de los implantes dentales. Se conoce que el porcentaje de fracaso de estos procedimientos es relativamente bajo. Se realizó una revisión bibliográfica con el objetivo de actualizar información sobre la importancia de la implantología, sus causas y complicaciones (AU).

SUMMARY Implantology is a branch in constant evolution, presenting every time faster, more predictable and minimally invasive techniques; nowadays it is a very complete solution for those persons that, for any reason, have lost one or more teeth, and has meant great advances in odontology. Scientific and technological advances, and also the improvement of surgical praxis, have made the success rate of dental grafts higher than 95 % after a year of being made. It is known that failure percentage is relatively low. A bibliographic review was carried out with the aim of updating the importance of implantology, its causes and complications (AU).

Relationships among the periodontal biotype characteristics in the maxillary anterior / 华西口腔医学杂志

OBJECTIVE@#To explore the correlation among gingival thickness (GT), underlying alveolar bone thickness (BT), and other periodontal biotype characteristics in the maxillary anterior.@*METHODS@#A total of 40 young volunteers with healthy periodontal were involved in this research. The periodontal probe was previously used to divide the gingiva from thick to thin. Two records were measured by cone beam CT (CBCT) GT, which was measured at the cement-enamel junction level; and BT, which was measured at 3 locations: 1, 3, 5 mm below the alveolar crest. Oral and gypsum measurements were used to analyze the associations of the crown width/crown length ratio (CW/CL), the keratinized mucosa width (KM), and the free gingival margin curvature.@*RESULTS@#Significant difference in the GT was observed between the thick and thin biotypes, which were divided by periodontal probe (P<0.01). Difference was observed in each periodontal biotype characteristic between the thick (GT≥1 mm) and thin biotypes (GT<1 mm) (P<0.05). BT was positively associated with GT (r=0.293, P=0.001), CW/CL (r=0.273, P=0.003), KM (r=0.291, P=0.001), and free gingival margin curvature (r=0.290, P=0.001).@*CONCLUSIONS@#The transparency of the probing in the sulcus could analyze the GT qualitatively. The thick and thin biotypes have different periodontal biotype characteristics. Compared with individuals with thick biotype, those with thin biotype are susceptible to risk dental aesthetic.

Clinical application and new progress of dynamic navigation system in the field of oral implantology / 口腔疾病防治

@#Currently, computer-aided implant surgeries include implant placement surgery under the guidance of a dynamic navigation system. With the use of software inherent in the navigation system, doctors can make a preoperative plan including the ideal position of the implant. Then the plan can be accurately transferred to the surgery, during which the real-time condition of the drill and its relationship with the surgical region will be visualized by the surgeon and the drill can be adjusted in a timely manner. Currently the dynamic navigation system is increasingly widely utilized, especially in cases of esthetic zones or surgical sites with important anatomical structures. However, the clinical workflow of the navigation system is complicated, including CBCT taken after the registration device placement, prosthetic-driven 3D design, calibration, registration, navigated borehole preparation and implant placement surgery. Many details should be considered when the device is applied, including implant position design, fixation of the tracking device, registration, and stable borehole preparation under the guidance of dynamic navigation. Therefore, this article introduces the dynamic navigation system into the clinical workflow and evaluates, the effects of the application and the clinical features. The new progress of the navigation system in the field of implantology is demonstrated at the same time, including navigated surgery in fully edentulous arches and in the zygomatic zone. Further improvements in the navigation system in terms of the accuracy and simplification of the workflow are needed in the future.

The application of digital technology in preclinical education for graduate students majoring in oral implantation / 口腔疾病防治

Objective@#To discuss the application of digital technology in the education of implant dentistry.@* Methods@#According to the teaching method that combines case-, problem- and team-based learning, a course on implant theory was carried out in a class of 20 students. Then, all the students in this class were divided into two groups to receive two clinical operation training courses. The first was the training of a free-hand implant, and the second was an implant operation under a digital template. The courses introduced digital technology into preclinical education and simulated implant training. After the two courses, students were organized to analyze the accuracy of the implant, the operation time and the experiences of these two courses. Through the comparison of students′ operations of free-hand and template implants, students could analyze their own faults and propose a method of improvement. The students scored the two classes. @*Results @# Through the two classes, all the students completed the implant operation under the guidance of a template and free-hand method and found their own problems and solutions. The combination of theory and practice deepened the students′ understanding of the teaching content. Finally, the classes were graded comprehensively by students, showing that the students′ satisfaction with the digital template class was higher than that with the free-hand class (P < 0.05).@*Conclusion@#The addition of a digital implant technology class significantly improved students′ comprehensive assessment, improved the teaching effect and was more acceptable to students in terms of gaining additional professional skills.

Evaluation Of Nasopalatine Canal Using Cone Beam Computed Tomography – A Retrospective Study

Background:Implantology is a very significant branch of dentistry that deals with the rehabilitation of edentulous patients. Thus, knowledge of anatomical variations of related neurovascular structures such as the nasopalatine canal is essential. Aim:The aim of study was to determine the form, length, and diameter of the nasopalatine canal using CBCT. Materials and Methods:In this retrospective study, images were archived from CBCTunit and visualized using Romexis software. The nasopalatine canals of 50 patients between the age range of 18-59years were analyzed. The shape of the nasopalatine canal, length of the nasopalatine canal and the diameter of incisive foramen were assessed in sagittal and coronal section. The width of labial and palatal alveolar bone around the canal and inclination of the nasopalatine canal to hard palate were evaluated. Statistics: (1) if there is any relation between the gender and the assessed parameters (2) if there is any relation between edentulous and partially edentulous patients with the assessed parameters.Results:The most common shape of the nasopalatine canal was cylindrical. The average length of the nasopalatine canal was 12.14±2.41 mm and the average diameter of incisive foramen 3.45±0.84 mm anteroposteriorly and 3.77±0.94mm mediolaterally. The average inclination of the nasopalatine canal to hard palate was 119.93±9.73°Conclusion:This study highlights the variations seen in the nasopalatine canal. The close vicinity of nasopalatine canal and implant can lead to sensory disturbances and damage of the tissues. Thus, a thorough knowledge before the surgical - implant procedure using cone beam computed tomography seems beneficial.

Análisis de supervivencia de implantes dentales en la determinación de su éxito o fracaso, practicados en consultorios de la ciudad de pereira, colombia

Los implantes dentales han representado un gran avance en la odontología moderna y los esfuerzos realizados de la investigación científica y desarrollo industrial han permitido conseguir excelentes resultados de fiabilidad de las técnicas. El número de consultas odontológicas debido a pérdidas de piezas dentales ha arrojado como causas más comunes: edad, enfermedades bucofaríngeas que pueden conllevar a pérdida ósea, mala higiene bucal, deficiencias óseas, traumatismos, enfermedades sistémicas, entre otras. Como consecuencia de ello, los profesionales buscan permanentemente mejorar y diversificar los procesos tecnológicos de implantología; optimizan el tipo de material y los elementos usados en dichos procesos, con el afán de encontrar los mejores resultados de fijación y adaptación en sus pacientes. Esto les permite acceder a tecnología de punta con el fin de mejorar los resultados. El propósito de la investigación realizada es determinar el número de éxitos y fracasos en procesos de implantología en pacientes de consultorios odontológicos de la ciudad de Pereira, Colombia. Se realizó un estudio de tipo descriptivo, la caracterización de la técnica fue tipo de implantes. Se realizó una aplicación de ficha de recolección de datos a los odontólogos de los consultorios. Se determinó que el porcentaje de implantes exitosos corresponde al 97,1%, de modo que la mayoría de los implantes son de tipo largo con un porcentaje del 94,58%. No se identificó que exista relación directa entre el fracaso del implante y el tipo de consultorio.

Dental implants have represented a great advance in modern dentistry. The efforts made in scientific research and industrial development have allowed to achieve excellent results regarding reliability of the techniques. The amount of patients consulting the dentist due to the loss of teeth, have shown that the main causes are, age, oropharyngeal diseases that can produce bone loss, poor oral hygiene, bone deficiencies, trauma, systemic diseases, among others. As a result, dental professionals permanently seek to improve and diversify the technological implant processes, optimizing the type of material and tools used in these processes, with the purpose of achieving the best results of fixation and adaptation for patients; which allows them to access to the latest technology, and have the best results. The purpose of this research is to determine the amount of success and failure of dental implants in patients of dental offices in the city of Pereira, Colombia. A descriptive study was carried out, the characterization of the technique, type of implants; support the research by applying to the dentists an instrument of data collection. It was determined that the percentage of successful implants corresponds to 97.1%. Evidencing that most of the implants are long type 94.58% respectively, it was not stablished that there is a direct relationship between the failure of the implant and the type of dentist office.

Os implantes dentários têm representado um avanço na odontologia moderna. Os esforços de investigação científica e desenvolvimento industrial tornaram possível alcançar excelentes resultados de confiabilidade das técnicas. O número de visitas ao dentista devido à perda de dentes, têm como causas mais comuns: idade, doenças da orofaringe que podem levar à perda óssea, má higiene oral, deficiência óssea, trauma, doenças sistêmicas, entre outros. Como resultado, os profissionais estão constantemente procurando melhorar e diversificar os processos tecnológicos de implantologia, otimizando o tipo de material utilizado nestes processos, com o objetivo de encontrar os melhores resultados de fixação e adaptação para os pacientes; o que lhes permite acessar tecnologia de ponta, a fim de melhorar os resultados. O objetivo da pesquisa feita é determinar o número de sucessos e falhas nos processos de implantologia em pacientes de clínicas odontológicas na cidade de Pereira, Colômbia. Foi realizado um estudo descritivo, a caracterização da técnica, tipo de implantes, suportando a pesquisa mediante a aplicação de um formulário de coleta de dados para os dentistas dos consultórios. Foi determinado que a porcentagem de implantes de sucesso corresponde a 97,1%. É evidenciando que a maioria dos implantes são de tipo longo, com uma percentagem de 94,58%. Não é identificada relação direta entre a falha do implante e o tipo de consultório.

Anciano rehabilitado con prótesis dental sobre implantes de carga inmediata / Rehabilitated aged patient with dental prothesis on immediate load implants

Se presenta el caso clínico de un anciano de 65 años de edad, que acudió a consulta multidisciplinaria en la Facultad de Estomatología Raúl González Sánchez en La Habana, porque había recibido tratamiento protésico en tres ocasiones durante los últimos dos años y ninguno había reunido los requisitos de retención necesarios para sentirse seguro y cómodo. Se siguió un protocolo que comprendió una fase quirúrgica mediante la aplicación de la técnica implantológica de carga precoz o inmediata por sobredentadura, con lo cual se mejoró la calidad estética y funcional del paciente, y se obtuvo su satisfacción total.

The case report of a 65 year-old old man is presented who attended the multidisciplinary department in Raúl González Sánchez Stomatology Faculty in Havana, because he had received prosthetic treatment in three occasions during the last two years and none had gathered the necessary retention requirements to feel sure and comfortable. A protocol was followed which comprised a surgical phase by means of the use of the implantological technique with early or immediate load by overdenture, with which improved the patient's aesthetic and functional quality, and his total satisfaction was achieved.

Consideraciones clínicas y éticas en la implementación de rehabilitaciones implantoprotésicas en el adulto mayor / Clinical and ethical considerations in the implementation of dental implants rehabilitations in senior adults

RESUMEN La falta de equidad y justicia en la distribución de alta tecnología no excluye la salud pública en casos donde la disponibilidad es inferior a la demanda. Dentro de la estomatología, la implantología en Cuba dispone de recursos limitados y la valoración multidisciplinaria para rehabilitar mediante implantes dentales al adulto mayor depende de factores objetivos y subjetivos. En el presente artículo, en la medida que se identifican los factores que determinan en la exclusión de adultos mayores para rehabilitarse mediante implantes dentales; se pretende como objetivo exponer consideraciones clínicas y éticas a considerar para una justa y eficaz selección. Se concluyó que los factores subjetivos influyen en los bajos índices de ingresos de adultos mayores para rehabilitarse, y que la consulta multidisciplinaria debe impartir equidad y justicia en la selección considerando la calidad de vida como un factor primordial para alcanzar un envejecimiento saludable.

ABSTRACT The lack of justness and justice in the distribution of high technology don't exclude the public health in cases where the readiness is inferior to the demand. Inside of dentistry, the implantology has in our country limited resources, and the multidisciplinary assesment to rehabilitate by means of dental implant to senior adult it depends on objective and subjective factors. In this article, in the measure that the factors which determine an bigger exclusion of senior adult are identified to become rehabilitated by means of dental implant; it is sought as objective to expose clinical and ethical considerations to consider for a fair and effective selection. Was concluded that in spite of having an established systematical diagnoses, subjective factors influence in the low index of senior adult to become rehabilitated, and that the multidisciplinary consultation should impart justness and justice in the selection considering the quality of life like a primordial factor to reach a healthy aging.

3D printing technology in the application of oral implantology and prosthodontics / 医学研究生学报

3D printing technology has been developing rapidly in recent years, It is first applied in the engineering field, and then extended to medical field. In the field of stomatology 3D printing technology was first mainly applied to medical implants such as artificial bone joints and prostheses. With the development of technology, 3D printing technology is gradually used to manufacture the biologically active tissues such as blood vessels, skin and inner ear. With its unique advantage, 3D printing technology is gradually applied in oral implantology and prosthodontics.This paper reviews the basic steps of 3D printing technology, the technology in oral implantology and prosthodontics，and the existing problems.