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At least 19 recordsLinked to original sources
PubMed1989

[Maintenance care for dental implant].

Dental implant has tried at the early stage in 19th century recovering an oral function and esthetics. Technological revolutions in biochemical and new materials have developed on the remarkable change in the dental implants, nowadays we call the three generation therapy for dental implantology. There are many kinds of methods and techniques in dental implants, however a lot of troublesome complication on the process of surgical phase, construction of prothodontics and prognosis of maintenance care. In the proceedings of this symposium, I would like to propose you how to manage the maintenance care for various kind of dental implants through the methodology and case presentations. Tendenay and future for dental implants The current outlook of dental implant has increasing supply and demand not only dentists but also patients. According to Japanese Welfare Ministry's report in 1987, average missing teeth over sixty years old generations are approximately 42% in accordance with NIDR (U.S.A.) research. They are missed on ten over teeth in full 28th teeth dentitions owing to dental caries and periodontal diseases. Generally speaking, latent implant patients are occupied on the same possibility of needs for dental implants both Japan and U.S.A. Management of maintenance care The patients hardly recognized the importance of plaque control for the maintenance care in the intraoral condition after implantation. Dentists and dental staffs must be instruct patients for importance of plaque removal and control, because they already had forgotten the habit of teeth cleaning, especially in the edenturous conditions. 1) Concept of establishment in oral hygiene. Motivation and instruction for patients include very important factors in dental implants as well as in periodontal diseases. Patients who could not achieve on good oral hygiene levels obtained no good results in the long term observations. To establish good oral hygiene are how to control supra plaque surrounding tissues with patient himself. Ultimate concept of implantology have supported common concordance with periodontal therapy. 2) Patients consent and co-operation the right of informed consent, agreement to treatment by the patient has been gaining increased importance to implantology. Even the patient has consent, they must co-operate the process of dental implant with co-therapist (Fig. 2). 3) The clinical examination of clinical parameters in dental implants. (1) Plaque Index (Silness & Loe 1964) and Plaque Control Record (0 Leary 1978) (Table 5). (2) Gingival inflammation (Fig. 3). Ordinarlly, Gingival Bleeding Index (GBI Ainamo & Bay 1975) and Papilla Bleeding Index (Saxer & Jühlemann 1975) are used. (3) The depth of peri-implant sulcus with the plastic probe. (NDU style) (Fig. 4).(ABSTRACT TRUNCATED AT 400 WORDS)

Dental Implants↗
PubMed1989

[Dental implants. History and tissue reactions of implants].

Dental implant (oral implant) is totally based on dentistry and the progress in its technology. On this occasion, dental implant are described from the standpoints of experimental pathology and clinical pathology. Demands for improved dental technology have brought significant developments in the dental implant field. Based upon the latest general implant technology, improvements in dental implant technology have primarily taken the form of better materials and designs historically. The object of these developments has been to provide the patients with restored teeth whose structure and function are asymptotically close to those of natural teeth while enhancing recovery of the occlusion function and improving aesthetic quality by means of applying technique of oral surgery (including periodontics) and prosthodontics. The basic structure of the dental implant consists of the substructure buried in the jaw bone, the junction, and the superstructure projected into the oral cavity. These three items correspond respectively to the root, the neck, and the crown of a natural tooth. However, neither the structure nor the function of such an implant body can be identical to those of a natural standing tooth. Physiologic metabolism, which is present in the latter, does not exist in the former. Therefore, it should always be remembered that even modern technology and materials can not reproduce the oral conditions identical to those produced by physiologic tissue and functions which are subject to chronological change. We should bear in mind that this system, unlike those made up by inter-material relations or inter-organic relations is made of an artificial structure, functions apart from the natural organs, and serves only as a substitute. Certain inherently unstable factors are inevitable. For example, radiographic findings confirm that V-shaped radiolucency by bone resorption in the alveolar bone surrounding the tooth neck is always more extensive than in the case of natural teeth. First study: Histopathological Studies of Tissue Reaction for Implant Materials(Fig. 4-10). This study is a basic experiment to help the development of implant materials used in repairing extraction wounds of teeth and bone defects. It is desirable that the materials should be preservable, easy to process, and with high histocompatibility. Examined materials are DCFF or non-DCFF treated bone matrices (grafts) of rats and human, and single crystal ceramics (Al2O3). DCFF treatment is a procedure of decalcifying, defatting and freeze-drying bones and ligaments of animals after fixation in formalin for immunological tolerance (M. KATAGIRI got a patent for this invention in America, West Germany and Japan, Table 1).(ABSTRACT TRUNCATED AT 250 WORDS)

Aluminum Oxide↗
PubMed2002

A simplified impression technique for dental implants.

Dental implants have been considered an acceptable form of dental treatment since the early 1980s. A number of studies have been published describing impression techniques for dental implants. Many of the techniques described are so complex that they may seem daunting to the average restorative dentist. Most general practitioners do not wish to attempt to restore dental implants. This article describes a very simple, yet extremely accurate, technique for making impressions of dental implant fixtures.

Acrylic Resins↗
PubMed2004

Retrofitting a cast dowel-core on salvaged dental implants.

Dental implant screw fracture involves attempting to retrieve the screw fragment or, as an alternative, attempting to salvage the dental implant. Circumstances that do not allow for screw retrieval require a solution in which the internal configuration of the dental implant can provide for a custom direct dowel fabrication. The proposed technique is to retrofit the fabrication of a custom cast dowel-core and provisional use of a direct procedure, which provides accuracy of fit, retention, and ease of production.

Crowns↗
PubMed1995

Dental restorations using titanium osseointegrated dental implants.

Dental implantology (ie, the science of replacing teeth) has evolved from the use of crude, unstable, natural materials to the use of titanium osseointegrated dental implants and sophisticated prosthetic appliances. Dental prosthetics are used in an increasing number of routine dental restorations. Postoperative patients who have undergone dental restorations using titanium osseointegrated dental implants enjoy results that approximate the look and feel of natural teeth. Optimal patient outcomes are best accomplished through a multidisciplinary team approach, and perioperative goals of patient commitment and compliance are achieved through comprehensive education.

Contraindications↗
PubMedDate not supplied

Tobacco and dental implants.

Dental implants are the ideal standard of care for many oral health care providers. Tobacco use is an impediment to the success of this sophisticated procedure. Dentists who are trained to help their patients stop using tobacco are in position to improve their success rates with dental implants. A suggested protocol for tobacco cessation in the implant practice, if utilized, could raise the standard of health care in the dental office.

Contraindications↗
PubMed2004

Dental devices; reclassification of root-form endosseous dental implants and endosseous dental implant abutments. Final rule.

The Food and Drug Administration (FDA) is reclassifying root-form endosseous dental implants and endosseous dental implant abutments from class III to class II (special controls). Root-form endosseous dental implants are intended to be surgically placed in the bone of the upper or lower jaw arches to provide support for prosthetic devices, such as artificial teeth, in order to restore the patient's chewing function. Endosseous dental implant abutments are separate components that are attached to the dental implant and intended to aid in prosthetic rehabilitation. FDA is reclassifying these devices on its own initiative on the basis of new information. Elsewhere in this issue of the Federal Register, FDA is announcing the availability of the guidance document that will serve as the special control for these devices. FDA is taking this action under the Federal Food, Drug, and Cosmetic Act (the act), as amended by the Medical Device Amendments of 1976 (the 1976 amendments), the Safe Medical Devices Act of 1990, the Food and Drug Administration Modernization Act of 1997, and the Medical Device User Fee and Modernization Act of 2002.

Dental Implants↗
PubMed1997

Hard-tissue augmentation for the placement of anterior dental implants.

Dental implants have become a popular alternative for replacing missing teeth in every region of the oral cavity. In the anterior zone, special esthetic concerns require not only a stably anchored implant for long-term success, but also the presence of adequate hard and soft peri-implant tissues. Anterior tooth loss is often accompanied by considerable loss of alveolar bone, so augmenting hard tissue before or in combination with implant placement becomes a critical part of therapy. One of the most successful augmentation techniques is guided bone regeneration (GBR). Thus far, augmentation procedures using expanded polytetrafluoroethylene membranes (ePTFEa) have proved to be the most efficient and predictable surgical technique to enhance deficient bone sites. This article discusses some critical biological and clinical/technical aspects of GBR and describes techniques for anterior hard-tissue augmentation with the photographic documentations of three clinical cases.

Alveolar Bone Loss↗
PubMed2001

A model of temperature transients in dental implants.

Dental implants provide a continuous interface between the oral environment and the deep core structures of the jaws. Implants and trans-mucosal superstructures are primarily metal and heat conduction occurs readily. A hypothetical heat conduction model is investigated to determine the ranges of temperature gradients that might occur in implants. This model showed that a 60 degrees C heat source will cause a heat front of > or = 47 degrees C to advance > 3 mm down an implant within one second. Oral temperature transients may be a factor in implant pathology.

Dental Implants↗
PubMed2003

Genetic polymorphisms of the interleukin-1 gene and early marginal bone loss around endosseous dental implants.

Dental implant surgery commonly proceeds in two stages. It is generally accepted that bone loss around implants does not occur at stage-II surgery because implants do not receive mechanical loading. However, early marginal bone loss around implants occasionally does occur during the healing period. Genetic polymorphisms in the interleukin-1 (IL-1) gene have been reported to be important for bone homeostasis and susceptibility to bone disease. We therefore investigated whether the idiopathic early marginal bone loss around implants is related to polymorphisms in the IL-1 gene. We performed a case-control study. Patients demonstrating marginal bone loss around implants at stage-II surgery were designated as the 'marginal bone loss (+)' group and those without bone loss as the 'marginal bone loss (-)' group. Polymorphisms of the IL-1alpha and IL-1beta genes (IL-1A-889, IL-1B-511 and IL-1B+3954) were detected by restriction fragment length polymorphism using NcoI, AvaI and TaqI after polymerase chain reactions. A total of 251 implants were placed in 39 patients. Marginal bone loss was observed in 36 implants. The patients with IL-1B-511 2/2 genotype exhibited a significantly higher occurrence of marginal bone loss than those with IL-1B-511 1/1 or 1/2 genotypes (OR=5.63; 95% CI=1.20-26.42; P=0.033). Multiple logistic regression analyses showed a markedly increased odds ratio (OR=10.86; 95% CI=1.64-71.90) in IL-1B-511 2/2 genotype carriers, while ORs of the other risk factors for bone loss, such as age, smoking status, post-menopausal women and bone quality, remained between 0.44 and 6.20. There was no significant difference in the distributions of the IL-1B+3954 and IL-1 A-889 genotypes between cases and controls. These data suggest that the IL-1B-511 2/2 genotype has a significant association with the incidence of early marginal bone loss around endosseous implants.

Adult↗
PubMed1995

Some myths and legends about dental implants.

Dental practitioners are faced with difficulties in the interpretation of claims of superior properties of a dental system by a manufacturer at times. These difficulties stemmed from either insufficient information, inconsistent findings, lack of validity of the experiments, misinterpreted results or erroneous conclusions. The author attempted to address several frequently visited issues in the selection of a dental implant system. These issues included biocompatibility, the surface properties of titanium and its alloys, the efficacy of hydroxylapatite and calcium phosphate compounds, and the meaning of success rates.

Biocompatible Materials↗
PubMed1995

Dental implants and dental CT software programs.

Dental implants are titanium cylinders that are surgically implanted into the jaw to allow fixation of a permanent dental prosthesis. These have provided an attractive alternative to standard removable dentures and have become quite popular. To assess these patients preoperatively, CT software programs were developed that display multiple axial, cross-sectional, and panoramic images of the jaw. As a result, new dialogues and interactions were created between radiologists and dentists, and this in turn brought new territories and unfamiliar diseases to the radiologists' view. The purpose of this article is to familiarize the radiologist with dental implants, the surgical procedure, dental CT software programs, and related dental pathology.

Dental Implantation, Endosseous↗
PubMed1998

Unanticipated outcomes: dental implants.

Dental surgical implant treatment modalities continue to be relatively successful within musculoskeletal restorative systems. Because available systems include a wide range of metallic and ceramic biomaterials plus multiple designs for the implant body, transgingival abutment, and intraoral crown constructs, failure analyses of explanted devices must include comprehensive information. The current opinions are based on approximately 4000 musculoskeletal implant device studies conducted from 1970 to 1997. As a subset, the dental systems with and without calcium phosphate ceramic on the endosteal portion of the implants will be considered at 0 to 1, 1 to 5, 5 to 10, and beyond 10 years in vivo. Observations will be reported and opinions provided about the advantages and disadvantages of ceramic coated implant systems.

Coated Materials, Biocompatible↗
PubMed2000

[Histological and histomorphometric results of implantation of dental implants by early and late implantation].

In this study, a histologic and histomorphometric analysis of delayed and immediate-placed implants was performed. An implantation of 16 self-cutting conical titanium screw implants was carried out in 8 beagle dogs. Of these implants, 8 were placed immediately after extraction of the second premolar and 8 implants were placed after 6 months of healing after extraction. For dynamic histomorphometry, fluorochrome bone markers were injected at two different times prior to euthanasia. The specimens were examined macroscopically and microscopically 8 months after implantation. A histologic, dynamic, and static histomorphometry was performed with the aid of different computer programs. A mean surface of osseointegration of 75.7% and a mean soft tissue implant contact surface of 24.2% was seen in immediate-placed implants. For delayed implantation, an osseointegrated surface of 80.7% and a soft tissue covering of 19.3% was examined. The fibrogenic structures in the cervical implant part were more dense and there were more adhesive epithelial elements (hemidesmosomes) around delayed implants. The result of the dynamic and static histomorphometry showed no significant differences in the two groups (P < 0.1). In conclusion, it can be stated that a new steady-state of the soft and hard tissue around dental implants was seen 8 months after implant insertion in both groups. There was a pseudoankylotic healing in the osseous part. The lower level of osseointegration in immediate-placed implants was caused by early resorption of bone in the crestal part. Thus, a larger part of the implant was surrounded by soft tissue and a long epithelial attachment resulted.

Alveolar Process↗
PubMed2004

Development of dental implant movement (IM) checker for dental implant mobility assessment.

This study aimed at developing a dental implant movement (IM) checker for assessing quantitative dental implant mobility. The design of the instrument was based on the tooth mobility (TM) tester, which was previously developed by our group. The IM checker consists of a newly developed measuring probe which has the size of a typical dental drill so that it would be easy to measure at all regions of dental implants. The probe has a bimorph ceramics transducer for actuating an implant at constant frequency and force amplitude and for detecting acceleration response. A set of strain gauges were attached to the bimorph ceramics for detecting preload during measurement. A new digital data acquisition system was used to eliminate measurement artifacts mainly due to probe handling. The IM checker could discriminate the artificial dental implant models in the range of clinical tooth mobility M0 with variation less than 6%. The measuring time needed by five operators was less than 15 s. Accordingly, the IM checker has sufficient measuring reliability and therefore it could be introduced in dental clinics.

Dental Implants↗
PubMedDate not supplied

Microbiologic and radiographic analysis of ligature-induced peri-implantitis with different dental implant surfaces.

PURPOSE: The goal of this study was to evaluate microbiota and radiographic peri-implant bone loss associated with ligature-induced peri-implantitis. MATERIALS AND METHODS: Thirty-six dental implants with 4 different surfaces (9 commercially pure titanium, 9 titanium plasma-sprayed, 9 hydroxyapatite, and 9 acid-etched) were placed in the edentulous mandibles of 6 dogs. After 3 months with optimal plaque control, abutment connection was performed. On days 0, 20, 40, and 60 after placement of cotton ligatures, both microbiologic samples and periapical radiographs were obtained. The presence of Actinobacillus actinomycetemcomitans, Porphyromonas gingivalis, Prevotella intermedia/nigrescens, Campylobacter spp, Capnocytophaga spp, Fusobacterium spp, beta-hemolytic Streptococcus, and Candida spp were evaluated culturally. RESULTS: P intermedia/nigrescens was detected in 13.89% of implants at baseline and 100% of implants at other periods. P gingivalis was not detected at baseline, but after 20 and 40 days it was detected in 33.34% of implants and at 60 days it was detected in 29.03% of dental implants. Fusobacterium spp was detected in all periods. Streptococci were detected in 16.67% of implants at baseline and in 83.34%, 72.22%, and 77.42% of implants at 20, 40, and 60 days, respectively. Campylobacter spp and Candida spp were detected in low proportions. The total viable count analysis showed no significant differences among surfaces (P = .831), although a significant difference was observed after ligature placement (P < .0014). However, there was no significant qualitative difference, in spite of the difference among the periods. The peri-implant bone loss was not significantly different between all the dental implant surfaces (P = .908). DISCUSSION AND CONCLUSIONS: These data suggest that with ligature-induced peri-implantitis, both time and periodontal pathogens affect all surfaces equally after 60 days.

Acid Etching, Dental↗