Analysis on Focus of Clinical Evaluation of Dental Implants (Systems) / 中国医疗器械杂志

From the perspective of technical evaluation, this article introduces the focus of clinical evaluation of dental implants (systems) in comparison with the comparable devices and discusses the clinical evaluation of such products，combined with the clinical evaluation review of dental implants (systems) products in recent years, in order to provide reference for the registration of these products.

Observation of the effect on immediate mandibular implant-supported overdenture of micro implant system of Italy / Observação do efeito na sobredentadura imediata mandibular suportada por implante do sistema de micro implante da Itália

The study was design to investigate the clinical effect of Micro implant system in Italy on immediate mandibular implant-supported overdenture. A total of 192 patients with mandibular edentulous treated in our hospital were randomly divided into 2 groups in which the control group consisted of 96 patients treated with immediate mandibular implant-supported overdenture by Xive implant system, while the observation group included 96 cases treated with the overdenture by Italy Micro implant system. Patients were followed up for 1 year and then the states of implant-borne overdentures, marginal bone resorption around alveolar bone, the compatibility of implant restorations with adjacent teeth, adverse events and satisfaction degree were compared between the groups. According to the results of 1-year follow-up, the resorption around alveolar bone of the observation group was significantly higher than that of the control group (p<0.05). In the observation group the differences in labial gingival margin position, gingival color and texture were significantly better (p<0.05) as compared to control group. The incidence of adverse events was notably lower (p<0.05). The Italy Micro implant system has significant curative effect on mandibular implant-supported overdentures with good compatibility of the implant restorations with adjacent teeth and low incidence rate of adverse reactions, so it is worthy of clinical application and spreading.

O estudo foi desenvolvido para investigar o efeito clínico do sistema de implantes de B&B na Itália na prótese total imediata apoiada em implante mandibular. Um total de 192 pacientes com desdentação mandibular, tratados em nosso hospital foram divididos aleatoriamente em 2 grupos, nos quais o grupo controle consistia em 96 pacientes tratados com overdenture imediato apoiado por implante mandibular pelo sistema de implante Xive, enquanto o grupo de observação incluiu 96 casos tratados com o sobredentadura pelo sistema de implantes Itália B&B. Os pacientes foram acompanhados por 1 ano e, em seguida, foram comparados os estados de sobredentaduras implanto-suportadas, reabsorção óssea marginal ao redor do osso alveolar, compatibilidade das restaurações do implante com dentes adjacentes, eventos adversos e grau de satisfação. De acordo com os resultados do seguimento de 1 ano, a reabsorção ao redor do osso alveolar do grupo de observação foi significativamente maior que a do grupo controle (p <0,05). No grupo de observação, as diferenças na posição da margem gengival labial, cor gengival e textura foram significativamente melhores (p <0,05) em comparação ao grupo controle. A incidência de eventos adversos foi notavelmente menor (p <0,05). O sistema de implantes B&B da Itália tem um efeito curativo significativo nas sobredentaduras mandibulares suportadas por implantes, com boa compatibilidade das restaurações dos implantes com dentes adjacentes e baixa taxa de incidência de reações adversas, por isso é digno de aplicação clínica e disseminação.

Criterios de selección de marca comercial de implantes dentales más usados por especialistas / Brand selection criteria for specialists most used dental implants

RESUMEN: Objetivo: Determinar los criterios de selección más usados al elegir una marca comercial de implantes dentales según odontólogos especialistas. Material y método: Se identificaron los parámetros para escoger una marca de implantes, estos se clasificaron en técnicos y mercadológicos, ordenándose en un cuestionario de tipo cerrado, valorándose por medio de escala psicométrica Likert del 1 al 5, además se incluyó una pregunta abierta. Se tomó una muestra por conveniencia de veinte odontólogos especialistas con experiencia al menos en tres marcas de implantes. Para el análisis estadístico descriptivo se usó Microsoft Excel 2011 versión para Mac, utilizando medidas de tendencia central como la Media Aritmética y Moda. Los parámetros técnicos se clasificaron de 1a hasta 1i, mercadológicos del 2a hasta el 2f y los sugeridos de p1 a p7. Resultados: La variabilidad en pilares de retención protésica, disponibilidad adecuada de los productos ofertados por la empresa y la compatibilidad de los aditamentos entre marcas comerciales, fueron los factores más relevantes considerados por especialistas a la hora de elegir un determinado sistema de implante. Conclusión: Las razones que más influyen en la elección de un sistema de implante son la variedad y disponibilidad de productos junto a la compatibilidad entre marcas.

ABSTRACT: Objective: The aim of this study is to determine the most used selection criteria when choosing a commercial brand of dental implant according to specialist. Material and methods: We identified the parameters to choose an implant brand, these were classified as technical and marketing, ordered in a closed questionnaire, assessed by means of a Likert psychometric scale from 1 to 5, plus an open question was included. A convenience sample of twenty specialists with experience in at least three implant brands. For the descriptive statistical analysis, Microsoft Excel 2011 version for Mac was used, using measures of central tendency such as Arithmetic Media and Fashion. For this same purpose, the technical parameters were classified from 1a to 1i, marketing parameters from 2a to 2f and suggested parameters from p1 to p7. Results: The variability in prosthetic retention pillars, adequate availability of the products offered by the company and the compatibility of the abutments between trademarks, were the most relevant factors considered by specialists when choosing a specific implant system. Conclusion: The arguments that most influence the choice of an implant system are variety and availability of products, as well as the compatibility between brands.

Significant considerations of mechanical strength of BLT implant (Roxolid): Correlation between material and product strength under static and fatigue loads / 대한치과재료학회지

The purpose of this study is to correlate the material properties of TiZr alloy material (Roxolid) and the mechanical strength of the implant fixture (BLT) through the maximum compressive load test and the fatigue test. Implant samples were purchased with BLT (Roxolid, Straumann, Switzerland) and Octa1 (cold-worked, Megagen Implant, Korea) fixtures made of two materials (TiZr and cold-worked Ti Grade 4). After the maximum compressive load test, the test specimens were analyzed with a optical microscope to confirm the fracture pattern. After the fatigue test, the samples that passed 5 million cycles were analyzed for the precision fit using a scanning electron microscope. Data were analyzed using Student's t-test (α=0.05). In the compressive load test, the small diameter (3.3 mm) implants with the same length and the common diameter (4.1 mm) implants had fracture or bending regardless of the material in both the test and control groups. The fatigue load showed the same results without significance and the gap between the fixture and abutment interface was within 10 µm in both the test and control groups in the precision fit test. There was no statistically significant difference in the maximum compressive load and fatigue test for the comparison of mechanical strength between two systems (BLT vs. Octa1) with same diameter and length, similar shapes and connections.

Application of membrane guided bone regeneration technique combined with 3 I implant system in anterior dental implant / 中国基层医药

Objective To analyze the clinical effect of membrane guided bone regeneration technique combined with 3 I implant system in anterior dental implant.Methods 50 patients with anterior teeth missing were selected as the experimental group,they received membrane guided bone regeneration technique combined with 3 I implant system of dental implant.50 cases alone with 3 I implant system of dental implant were selected as the control group.The clinical data were retrospectively analyzed.The effects of the two groups were compared.Results Statistical results showed that the satisfaction of appearance and function had significant difference between the two groups(χ2 =6.73,P<0.05).The operation area of plaque index (PLI) (t=3.16,P<0.05),gingival sulcus bleeding index (MBI) (t=6.32,P<0.05),probing depth (PD) (t=2.63,P<0.05) had significant differences between the two groups.The thickness of the buccal tongue of the bone graft,and other indicators of the top of the implant to the top of the alveolar ridge showed significant differences between the two groups (t=17.65,P<0.05,t=8.48,P<0.05). Conclusion Using membrane guided bone regeneration technique and 3 I implant system combined application can improve dental implant in the anterior and the success rate of patients on the appearance and function of satisfaction after dental implant in the anterior,and to broaden the bone defect of anterior tooth planting the indication effect,it is worthy of clinical promotion.

Multicentric retrospective clinical study on the clinical application of mini implant system

INTRODUCTION: Mini-implant system is applicable to areas of narrow space and area requiring temporary loading support. The purpose of this study was to evaluate the clinical outcome of a mini-implant system as well as the application of mini-implant system in the dental clinical field. MATERIALS AND METHODS: The patients who had been operated from Jan 2007 to Dec 2007 in the four dental facility including Seoul National University Bundang Hospital were enrolled. To evaluate the factors associated with the clinical outcome, the patients were classified according to gender, age, area of surgery, type of implant, diameter and length of the implant, and the purpose of the mini-implant system application. RESULTS: From 147 implants, only three implants failed, one of them was for temporary loading. There were no serious surgical or prosthetic complications in this study. CONCLUSION: An analysis of the preliminary data revealed a satisfactory clinical outcome. However, more long-term evaluation of narrow ridge type as well as the patient's satisfaction on the use of a provisional type mini-implant system is needed.

Sinking and fit of abutment of locking taper implant system

STATEMENT OF PROBLEM: Unlike screw-retention type, fixture-abutment retention in Locking taper connection depends on frictional force so it has possibility of abutment to sink. PURPOSE: In this study, Bicon(R) Implant System, one of the conical internal connection implant system, was used with applying loading force to the abutments connected to the fixture. Then the amount of sinking was measured. MATERIAL AND METHODS: 10 Bicon(R) implant fixtures were used. First, the abutment was connected to the fixture with finger force. Then it was tapped with a mallet for 3 times and loads of 20 kg corresponding to masticatory force using loading application instrument were applied successively. The abutment state, slightly connected to the fixture without pressure was considered as a reference length, and every new abutment length was measured after each load's step was added. The amount of abutment sinking (mm) was gained by subtracting the length of abutment-fixture under each loading condition from reference length. RESULTS: It was evident, that the amount of abutment sinking in Bicon(R) Implant System increased as loads were added. When loads of 20 kg were applied more than 5 - 7 times, sinking stopped at 0.45 +/- 0.09 mm. CONCLUSION: Even though locking taper connection type implant shows good adaption to occlusal force, it has potential for abutment sinking as loads are given. When locking taper connection type implant is used, satisfactory loads are recommended for precise abutment location.

Multilateral analysis of Renova(R) implant placement and its Survival rate / 대한치주과학회지

PURPOSE: Given the predictability of dental implant procedure from the studies of successful osseointegration, implant dentistry is often the treatment of choice to replace missing teeth in edentulous patient instead of the fixed prosthesis or removable denture. The Renova(R) dental implant has a RBM(Resorbable Blast Media) surface, internal hex prosthetic connection and a tapered design. At this study gives the analysis of the implant and the short term survival rate of the implant. MATERIAL AND METHODS: In this study, a multilateral analysis was performed on the subjects undergoing placement with Renova(R) implant between August 2006 and February 2008 in Yonsei University dental hospital. 96 implants were placed in 56 patients and they were surveyed for cumulative survival rate. Among them 78 implants in 44 patients were surveyed for the rest analyses. RESULT: 1. The cumulative survival rate was 96.88% of 96 implants in 56 patients. 2. The mean marginal bone loss was 0.803mm and the marginal bone loss in augmentation group has higher value than the marginal bone loss in non augmentation group. 3. The health scale for the implants were 87% in success group, 9% in satisfactory survival group, 1% in compromised survival group, and 3% in failure group. 4. Two implants placed in poor bone posterior area by 2-stage failed during prosthetic procedure. CONCLUSION: Renova(R) dental implant showed high cumulative survival rate in installation on partial edentulous ridge and could be a predictable implant system.

Fit of fixture/abutment/screw interfaces of internal connection implant system / 대한치과보철학회지

STATEMENT OF PROBLEM: Accurate fit between the implant components is important because the misfit of the implant components results in frequent screw loosening, irreversible screw fracture, plaque accumulation, poor soft tissue reaction, and destruction of osseointegration. PURPOSE: This study is to evaluate the machining accuracy and consistency of the implant fixture/abutment/screw interfaces of the internal connection system by using a Stereoscopic Zoom microscope and FE-SEM(field emission scanning electron microscope) MATERIALS AND METHODS: The implant systems selected in this study were internal connection type implants from AVANA(Osstem(R)), Bioplant(Cowell-Medi(R)), Dio(DIO(R)), Neoplant(Neobiotech (R)), Implantium(Dentium(R))systems. Each group was acquired 2 fixtures at random. Two piece type abutment and one piece type abutment for use with each implant system were acquired. Screw were respectively used to hold a two piece type abutment to a implant fixture. The implant fixtures were perpendiculary mounted in acrylic resin block. Each two piece abutment was secured to the implant fixture by screw and one piece abutment also secured to the implant fixture. Abutment/fixture assembly were mounted in liquid unsaturated polyester. All samples were cross-sectioned with grinder-polisher unit. Finally all specimens were analysed the fit between implant fixture/abutment/screw interfaces Results and CONCLUSIONS: 1. Implant fixture/abutment/screw connection interfaces of internal connection systems made in Korea were in good condition. 2. The results of the above study showed that materials and mechanical properties and quality of milling differed depending on their manufacturing companies.

A Two-year Retrospective Study on the Clinical Success of the Korean Implant Systems / 대한치주과학회지

The purpose of this study was to evaluate the success rate of Korean implant systems. A total of 245 implants were placed in 112 patients using different implant systems from February 1988 until June 2002. Data on implant systems, implant positions, surface treatments, guided bone regeneration procedure, marginal bone levels, and states of surrounding gingiva were collected. A follow-up evaluations were done after 1 year and 2 year of loading. Clinical parameters such as probing depth was evaluated at the last follow-up. The marginal bone loss after 1 year of loading was measured on periapical radiographs. Clinical comparisons were performed to evaluate implants loss in relation to the implant systems, implant positions, surface treatments, and guided bone regeneration procedure. There was no clinical difference of success rate in implant systems, implant positions, and surface treatments. Mean marginal bone resorption from the time of loading to 1 year follow-up was 0.31mm in Korean implant systems and 0.41mm in other implant systems. The cumulative survival rate of Korean implant systems and other implant systems at the 2-year of loading was 95.6% and 97.3% respectively. From these results, it was concluded that Korean implant systems could be successfully used in clinical dentistry.