Search PubMed⌕ Search

SEARCH · Search PubMed

Results for “DENTAL IMPLANTATION”

Search indexed PubMed citations on genomics, clinical trials, systematic reviews and public health. Explore titles, authors and supplied subject terms, then open the PubMed record.

Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.

At least 127 records · Page 7Linked to original sources
PubMed1999

Measurement of submucosal forces transmitted to dental implants.

Early loading of dental implants after placement is believed to be a major cause for premature implant failure. If a transitional denture or partial denture is used during the healing period, occlusal forces may be transmitted to the submerged implant, leading to poorly differentiated growth of bone cells and/or potential inhibition of osseointegration at the bone-implant interface. The objective of this study was to develop an experimental model to measure the force transmission and to characterize the effect of selected loading conditions and relief methods on the forces transmitted to the implant. The loading conditions studied included unilateral and bilateral loading of the prosthesis. Forces were measured at two different relief conditions (relief with and without soft liner) and were compared against a control with no relief. The results show that fabrication of the prosthesis with a proper relief at the implant-denture junction can eliminate the submucosal force transmission to the implant on loading the denture both under unilateral and bilateral loading conditions. When a soft liner is used at the relief site, the transmitted force is small, but a finite value is reproducibly recorded. With no relief, the submucosal force transmission is high and may adversely affect the healing process or osseointegration. The experimental model is valuable in measuring and understanding the submucosal forces that are transmitted to the implant by loading the transitional prosthesis, and such measurement may assist in the proper design of the prosthesis for improved clinical durability and for other uses.

Alveolar Process↗
PubMed1997

Mandibular reconstruction with fibular osteoseptocutaneous free flap and simultaneous placement of osseointegrated dental implants.

Insertion of osseointegrated dental implants several months after mandibular reconstruction using vascularized composite bone grafts has proved to be a successful method to achieve mastication and complete oral rehabilitation. Theoretically with primary placement of implants into the new mandible a better access to the bone is achieved, interdental relationships are easier to determine, and oral rehabilitation can be attained in a shorter period of time. Previous results describing this approach, however, are inconclusive and controversial. This review describes our experience with primary insertion of dental implants into fibular flaps used for mandibular reconstruction during ablative surgery. Adequate selection of patients for this combined procedure depends mainly on the pathological nature of the mandible and perioperative radiotherapy. Preoperative determination of soft-tissue and bone requirements, number of osteotomies, rigid fixation method, and familiarity with the use of osseointegrated implants are important factors that must be considered for adequate surgical planning and to achieve good results.

Dental Implantation, Endosseous↗
PubMed1986

Viability of the retained bone core in the core-vent dental implant.

The survival of dental implants has been correlated with the formation of a bone-implant interface. This study was done to determine whether the recently developed Core-Vent dental implant forms a bone-implant interface without intervening fibrous tissue. Core-Vent implants were placed in four dogs, and healing was evaluated histologically 15, 30, 60, and 120 days after insertion. Bone grew through the implant vents to join with the inner bone plug, and the implants approximated the bone without an intervening fibrous tissue layer.

Alveolar Process↗
PubMed2003

[Resonance frequency analysis in immediate loading of dental implants].

Immediate loading of dental implants aims to shorten treatment time. Stability at implant insertion is critical to success. The aim of this prospective study is to compare primary implant stability, measured by insertion torque (IT) with resonance frequency analysis (RFA) expressed as ISQ. Patients requiring implant therapy were treated by teeth extractions, placement of 1-9 MIS implants, bone augmentation as needed and fixed provisional restorations. We measured IT and ISQ for non-submerged loaded (NSL), non-submerged non loaded (NSNL) and submerged (S) implants. 14 patients, aged 34-79 years, were recruited. 53 implants were inserted (38 maxillary & 15 mandibular). 30 implants, 18 in fresh extraction sites, were immediately loaded. ISQ was 63.3 +/- 2.8 (S.E.), 67.2 +/- 3.5 (S.E.) and 58.8 +/- 2.7 for the NSL, NSNL and S groups, respectively (p = 0.0459). IT was 40.4 +/- 1.8 Ncm, 46 +/- 4.0 and 35.3 +/- 2.1 (p = 0.0646). ISQ and IT were not statistically different between extraction vs. non-extraction and augmented vs. non-augmented sites. We found a significant difference in IT between maxillary & mandibular sites, and a significant correlation between ISQ & IT and between ISQ & implant diameter. These data suggest that ISQ is correlated to IT and is influenced mainly by implant diameter and not by implant length, location or bone level. Finally, a case including immediate implants, bone augmentation and immediate provisional restoration is presented.

Adult↗
PubMed1997

[An investigation on peri-implant status in different types of dental implant].

Clinical, biochemical and microbiological methods were used to study the peri-implant status in different types of dental implant. Sixteen normal healthy adults with 12 one-stage implants and 22 two-stage implants were included in this study. Clinical parameters, proportion of subgingival spirochetes, detection rate of spirochetes were found to be significantly higher around one-stage implants than those around two-stage implants. No significant difference in gingival crevicular fluid flow, levels of aspartate aminotransferase and alkaline phosphatase was found between these two types. The bleeding index score in sites which harbored spirochetes was significantly higher than that in sites without spirochetes. The present data suggested that accumulation of plaque and existance of periodontal pathogens maybe related to peri-implant inflammation. This study suggests that plaque control and regular recall should be emphasized in implant maintenance.

Adult↗
PubMed1998

The soft tissue response to osseointegrated dental implants.

The use of dental implants in the treatment of fully edentulous patients has become an important addition in oral/dental rehabilitation. The fact that these implants penetrate the oral mucosa can lead to the assumption that peri-implant tissues, similar to the periodontal tissues, are fulfilling an important function as a barrier to protect the bony anchorage underneath. It has been shown that insufficient plaque removal may lead to peri-implant tissue disease with bone loss similar to teeth. However, it is unclear how important this cause is as a source of implant failure compared with other factors, such as inadequate bone healing, unfavorable quantity and quality of bone, or (bio)mechanical and functional problems. It is also not understood if peri-implant epithelium and connective tissue are equally needed and/or qualified to slow down or prevent tissue breakdown as their periodontal counterparts. The scientific work focusing on peri-implant soft tissues has dramatically increased in the past few years. Most studies to date have examined and described their structure but little data exist on their true biologic function. This review analyzes the current understanding of morphologic and clinical features of the peri-implant soft tissues. Furthermore, evidence shall be provided that peri-implant soft tissues do not interfere with the current favorable results obtained when treating the edentulous patient with osseointegrated implants.

Alveolar Bone Loss↗
PubMed1991

The tri-spade drill for endosseous dental implant installation.

Many aspects of endosseous dental implant practice have been addressed over the past several decades. While most of this attention has centered on the dental implant body itself and, most recently, on various aspects of prosthetic restoration, the installation armamentarium for site preparation and implant placement has been neglected. Drills, in particular, have received minimal attention, with most drills currently used for implant placement being identical, or nearly identical, to century-old wood or metal cutting instruments. The tri-spade drill design represents an innovation that has evolved from analysis of currently used implant drills, drill mechanics, and the mechanical and physical properties of bone, in consideration of the clinical realities of contemporary endosseous implant placement. The tri-spade drill design, which features three cutting edges, is much more stable in the hands of the practicing clinician. It reduces crestal chatter upon entry into the bone site (a stable drilling situation), resulting in a more perfectly prepared final hole for placement of a cylindrical root-form dental implant. The drill tip angle is designed specifically for use with bone; the reaming action associated with the sharpened cutting edges adjacent to the large side flutes also allows for efficient debris removal. The tri-spade drill design represents an incremental increase in the dental implant armamentarium and efficacy for the installation of endosseous cylindrical dental implants.

Dental Implantation, Endosseous↗
PubMedDate not supplied

Histopathologic observation of seven removed endosseous dental implants.

Seven failed endosseous dental implants that were removed from humans were examined histologically. Results suggest that the hollow-basket portion or the vent should be located as far from the gingiva as possible, and that an adequate healing period is needed for implant placement following tooth extraction. In addition, findings also suggest that the hollow-basket implant is not suitable for a healing socket, that periodic inspection is necessary for two-stage implants to evaluate adaptation of the embedded junction between the abutment and implant in the gingiva, and that there is risk of coating separation from hydroxyapatite-coated implants and possibilities of coating resorption.

Adult↗
PubMed2003

[The surgical complications of dental implants].

Replacing missing teeth with osseointegrated dental implants is a predictable technique as evidenced by the overall five-year implant survival rates ranging 93% to 97%. Few studies, however, address systematically the frequency or natural history of complications related to the use of dental implants. Reported complication rates range so widely, i.e. 1%-40%, as to be rendered clinically meaningless. Differences in reported rates may be attributable to differing definitions of complications. Even less has been written about risk factors for developing surgical complications related to the use of dental implants. Knowledge regarding the type and frequency of complications that can occur with implants is an important aspect of treatment planning, surgeon-patient communication, informed consent and post-treatment care. The purposes of this chapter are to: 1) summarize the reported types and frequencies of implant-associated complications, 2) identify risk factors for developing complications associated with the use of dental implants, and 3) to suggest strategies to avoid complications.

Dental Implantation, Endosseous↗
PubMed2000

Parameter on placement and management of the dental implant. American Academy of Periodontology.

The American Academy of Periodontology has developed the following parameter on the placement and management of dental implants. Dental implants are a recognized form of tooth replacement and as such should be presented as an alternative for the replacement of missing teeth. A comprehensive treatment plan should be developed in consultation with all parties involved. Patients should be informed about all therapeutic alternatives, including non-replacement, potential complications, expected results, and their responsibility in treatment. The patient should also be informed that, to insure implant health, close monitoring and professional care by the dental team and good personal home care are imperative. Appropriate educational materials are an essential part of gaining informed consent. Given this information, patients should then be able to make informed decisions regarding their implant therapy.

Dental Implantation, Endosseous↗
PubMed1994

The ITI Dental Implant System.

The ITI Dental Implant System is a unique, single-stage implant with research of 20-years duration. The technique, developed by Schroeder and coworkers, was designed to simplify the surgical and restorative aspects of implant therapy for both the patient and the clinician. This article describes the system, its advantages over two-stage systems, and indications for its use.

Dental Implantation, Endosseous↗
PubMed1992

Biomechanical factors affecting the bone-dental implant interface.

While it is known that dental implants can 'work'--the success of the Branemark 'osseointegrated' implant is a prime example--implants can also fail. The challenge is to develop a basic science understanding of all aspects which contribute to implant performance. In designing a successful dental implant, the main objective is to ensure that the implant can support biting forces and deliver them safely to interfacial tissues over the long term. Biomechanics are central in this design problem. Key topics include: (1) the nature of the biting forces on the implants; (2) how the biting forces are transferred to the interfacial tissues; (3) how the interfacial tissues react, biologically, to stress transfer conditions. For biting forces on dental implants, the basic problem is to determine the in-vivo loading components on implants in various prosthetic situations, e.g. for implants acting as single tooth replacements or as multiple supports for loaded bridgework. Significant progress has been made; several theoretical models have been presented for determining the partitioning of forces among dental implants supporting bridgework. However, more work will be needed to clarify how well these models match reality. Interfacial stress transfer and interfacial biology represent more difficult, interrelated problems. One problem is that the multitude of different shapes, sizes, materials, surgical sites and animal models for dental implants has precluded any generally accepted rules for biologically 'favorable' vs 'unfavorable' interfacial stress transfer conditions. While many engineering studies have shown that variables such as implant shape, elastic modulus, extent of bonding between implant and bone, etc., can affect the stress transfer conditions, the unresolved question is whether there is any biological significance to such differences. Recent research suggests that, at the very least, our search for a more detailed hypothesis regarding the relationship between interface mechanics and biology should take account of basic bone physiology, e.g. wound healing after implantation plus basic processes of bone modeling and remodeling.

Animals↗
PubMed1992

Experience with the Astra dental implant system.

The Astra Dental Implant System appears to be a relatively successful and economical method of osseointegration. This article lists its clinical components, explains how the system is fitted and discusses the preliminary results.

Aged↗
PubMed1992

Permucosal implantation pilot study with HA-coated dental implant in dogs.

The histological response of transmucosal one-stage titanium dental implants coated with hydroxyapatite is described. The gingival adhesion to the implant was examined with regard to coated, partially coated or non-coated surfaces in the cervical region. From each coating type, 9 implants were inserted into dogs. Six months after the insertion, 19 implants could be evaluated, but 8 implants were lost. From these 19 implants, 6 implants showed severe pockets with inflammation up to the bony tissue. The 13 successful implants showed direct bone bonding with the hydroxyapatite coating and adhesion of submucosal connective tissue to the implant surface, with inflammation. The marginal gingiva showed slight inflammation. A totally coated implant will probably introduce inflammation by debris formation against the rough implant surface more easily. The hydroxyapatite coating often disappeared in the soft tissue or in the oral cavity. Bone which directly adapted to the coating seemed to prevent it from resorption.

Animals↗
PubMed2006

Scalloped dental implants: a retrospective analysis of radiographic and clinical outcomes of 17 NobelPerfect implants in 6 patients.

BACKGROUND: The scalloped dental implant (NobelPerfect, Nobel Biocare, Yorba Linda, CA, USA) is designed to biologically guide and facilitate interproximal bone remodeling during healing and to maintain bone height and papillae during functional loading. The design features of the scalloped implant include hard and soft tissue apposition areas, which are parallel to each other and mirror the cementoenamel junction. The hard tissue surface area is intended for osseointegration. The soft tissue surface area is meant to support the connective tissue zone and to provide a space for the subgingival margin of the restoration. Current literature on the clinical performance of the scalloped dental implant is limited. PURPOSE: The aim of this study was to evaluate whether the scalloped dental implant maintains interproximal bone and the overlying soft tissue. MATERIALS AND METHODS: Radiographs for six patients (mean age 40.5 years) treated with 17 implants (NobelPerfect) were reviewed for an 18-month follow-up evaluation of bone response. Orthodontic movement and/or autogenous bone augmentation had been provided to obtain the best possible soft and hard tissue dimensions prior to implant placement. A surgical guide was used for an optimal implant placement. No surgical flap was reflected, and implants were placed a minimum of 2 mm and a maximum of 3 mm apical (midbuccally) to the most apical portion of the surgical guide. Final optimal rotational alignment was achieved in all cases by not exceeding 45 Ncm. Implants were immediately restored with provisional crowns. Photographic documentation provided the basis for analysis of papillary response. Radiographic change in the interproximal bone level was obtained by computer analysis (ImageJ for Windows, National Institutes of Health, Bethesda, MD) by measuring the distance from the interproximal shoulder of the scalloped implant to the crest of the bone. RESULTS: When the scalloped implants were placed adjacent to existing natural dentition, the average bone level at placement and at 6, 12, and 18 months was -1.7, -3.5, -3.8, and -3.9 mm, respectively, compared with -1.0, -3.6, -4.3, and -4.4 mm respectively, when placed adjacent to other scalloped implants. Papillae formation exhibited no differences from the configuration that typically results after placement of conventional dental implants. Moreover, bone loss around the scalloped implants was notably greater than that expected after traditional implant placement. CONCLUSION: This chart review of 17 scalloped implants, followed for 18 months, determined that the scalloped implant design resulted in bone loss that was more severe than that associated with properly placed conventional dental implants. Further, the design showed no evidence of exceptional capacity to increase or maintain soft tissue height.

Adult↗
PubMedDate not supplied

Early implant failures in patients treated with Brånemark System titanium dental implants: a retrospective study.

Implant failure has been associated with factors such as poor bone quality, insufficient bone volume, implant instability, unfavorable implant loading, and smoking habits. Infections and host responses may also be important factors in dental implant failure. The objectives of the present study were to identify various explanatory factors associated with titanium implant failure. Forty subjects with stage 1 non-osseointegrated titanium dental implants (NOTI) ad modum Brånemark and 40 age- and gender-matched control subjects with successfully osseointegrated titanium implants (SOTI) were studied. Clinical data and gamma G immunoglobulin (IgG) antibody titers were studied. An independent t test revealed that significantly longer implants were placed in subjects with SOTI (P < .05). Statistically significant differences in bone shape and resorption (BSR) scores were found between SOTI and NOTI (P < .05). Logistic regression analysis identified 3 significant explanatory outcome variables: serum antibody avidity scores for Bacteroides forsythus (P < .0001), serum antibody titers to Staphylococcus aureus (P < .001), and the BSR scores (P < .05). Antibody avidity to B forsythus and antibody titer to S aureus were therefore the 2 most important factors associated with early implant failures and with a significant predictive ability. This indicates that immunologic factors are involved in osseointegration.

Aged↗