Clinical application of computer-aided rapid prototyping for tooth transplantation.
Explore the source record for details and available documents.
Alveolar Process↗
SEARCH · Search PubMed
Results for “Tooth Socket”
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.
The use of a dental implant as an abutment in three unit implant-tooth supported fixed partial denture: a case report and 32 month follow-up.
The combined use of dental implants and teeth as abutments in fixed partial dentures may offer advantages to both patients and practitioners in certain clinical situations. An implant-tooth retained prosthesis may reduce surgical intervention and cost to the patient. It may also mean that anatomical restrictions to the provision of an implant-retained fixed prosthesis may be overcome. In this case report, the steps in provision of a three unit implant-to-tooth fixed partial denture are described and the treatment planning and prognosis of a restoration of this type are discussed.
Dental Abutments↗
Biological reactions to a poly(L-lactide)-hydroxyapatite composite: a study in canine mandible.
In this study, bone response, possible use and ultimate fate of a chemically-synthesized poly(L-lactide)-hydroxyapatite (PLLA-HA) composite was experimented in canine mandible. Bilateral mandibular second premolars were extracted in four dogs. The PLLA-HA composite was placed into left surgical sites, and right extraction sites were used as controls. After three months of healing, bone specimens were harvested from each animal and processed for histological evaluation. Bone uptake of methylene diphosphonate (99mTc-MDP) was calculated as indicators of osteoblastic activity in the surgical sites. Histological evaluation and the amount of 99mTc-MDP uptake showed that all surgical sites had similar levels of cellular activity and the material was biocompatible. The experimental PLLA-HA composite studied is safe to be used as a small-defect filler in applications such as repair of alveolar defects, ridge augmentations, and sinus lift procedures.
Animals↗
Ceramic-coated implant systems.
Practitioners have used hydroxyapatite-coated (HA-coated) endosseous and subperiosteal implants in various forms for many years. These have included root forms in both screw and cylindrical shapes, blades, and subperiosteals. The clinical predictability remains controversial and subject to claims and counterclaims. The early days of dental implantology involving root-form implants recommended their placement in fully edentulous cases only, and anterior to the maxillary sinus and mental foramen. Today's philosophy and rationale of dental implantology include the placement of a single implant replacing a missing natural tooth (especially where the teeth adjacent to the edentulous site have no caries or restorative experience). Implants are used to replace the natural dentition in one quadrant/segment, often preceded or accompanied by ridge augmentation and/or sinus grafting if sufficient bone is not present. So we have to address the clinical predictability of survival in terms of indications, quantity, and quality of bone. Clinical data and experience suggest that hydroxyapatite-coated (HA) dental implants may (and possibly should) be used in (1) Type IV bone, (2) fresh extraction sites, (3) grafted maxillary and/or nasal sinuses, or (4) with short implants (< or = 10 mm in length).
Alveolar Process↗
The finite element method: a tool to study orthodontic tooth movement.
Orthodontic tooth movement is achieved by (re)modeling processes of the alveolar bone, which are triggered by changes in the stress/strain distribution in the periodontium. In the past, the finite element (FE) method has been used to describe the stressed situation within the periodontal ligament (PDL) and surrounding alveolar bone. The present study sought to determine the impact of the modeling process on the outcome from FE analyses and to relate these findings to the current theories on orthodontic tooth movement. In a series of FE analyses simulating teeth subjected to orthodontic loading, the influence of geometry/morphology, material properties, and boundary conditions was evaluated. The accurate description of alveolar bone morphology and the assignment of non-linear mechanical properties for the PDF elements demonstrate that loading of the periodontium cannot be explained in simple terms of compression and tension along the loading direction. Tension in the alveolar bone was far more predominant than compression.
Alveolar Process↗
Relationship between porotic changes in alveolar bone and spinal osteoporosis.
Epidemiological studies have shown that post-menopausal women who do not use an estrogen supplement have fewer teeth than those who do. We hypothesized that changes in the dentition of post-menopausal women might be due to alveolar bone alterations by estrogen deficiency. To clarify this, we analyzed the microstructural alveolar bone changes in ovariectomized monkeys and compared these with their lumbar bone mineral density. The % of baseline bone mineral density showed a significant decrease in the ovariectomized group as compared with the controls. The second-molar interradicular septa in ovariectomized monkeys showed a significantly decreased nodes number, cortices number, and an increased structural model index value. More pores were seen in the ovariectomized group at the top of the septa. This study demonstrated that, in such monkeys, estrogen deficiency led to fragility of the trabecular structure of the molar alveolar bone, and such fragility was inversely correlated with lumbar bone mineral density.
Absorptiometry, Photon↗
Focal osteoporotic marrow defect: report of 100 new cases with ultrasonography scans.
Focal osteoporotic marrow defect (FOMD) may be the earliest detectable form of the ischemic marrow disorders. The exact cause is unknown, but three theories have been proposed in the literature. A fourth is presented in this paper. In this study, 100 biopsies were examined histologically and were diagnosed as FOMD, based upon consistent histological characteristics. Until recently, the only diagnostic criteria were radiographic evaluation and incisional biopsy. In February 2002, a through-transmission alveolar ultrasonic test (Cavitat 4000, Cavitat Medical Technologies, Inc., Aurora, CO) was approved by the US Food and Drug Administration and by Health Canada for detection of low bone density and bone desiccation, both features of FOMD and chronic ischemic bone disease. Within this article, the diagnostic criteria and pathological findings of FOMD will be presented. The three current theories concerning its etiology will be briefly presented and a fourth theory will be proposed.
Alveolar Process↗
Immediate and early replacement implants and restorations.
UNLABELLED: There have been rapid developments in dental implant treatment protocols to reduce the time between implant placement and restoration. Implants may be placed immediately following tooth extraction or following a period of healing to allow resolution of residual infection or sufficient bone and soft tissue healing. Early restoration and loading of implants has to be carefully controlled to avoid increased failure and complications. Advantages and disadvantages of the various techniques are described. CLINICAL RELEVANCE: The clinician should adopt a treatment protocol that ensures a high success rate and a long-term functional and aesthetic implant restoration. Rapid treatment protocols can be considered when they do not compromise these goals, and the clinician is sufficiently experienced in their application.
Dental Implantation, Endosseous↗
Extracellular matrix-mediated tissue remodeling following axial movement of teeth.
Tooth eruption is a multifactorial process involving movement of existing tissues and formation of new tissues coordinated by a complex set of genetic events. We have used the model of the unopposed rodent molar to study morphological and genetic mechanisms involved in axial movement of teeth. Following extraction of opposing upper molars, lower molars supererupted by 0.13 mm. Labeled tissue sections revealed significant amounts of new bone and cementum apposition at the root apex of the unopposed side following supereruption for 12 days. Newly apposited cementum and alveolar bone layers were approximately 3-fold thicker in the experimental vs the control group, whereas periodontal ligament width was maintained. Tartrate-resistant acid phosphatase staining indicated bone resorption at the mesial alveolar walls of unopposed molars and provided in tandem with new bone formation at the distal alveolar walls an explanation for the distal drift of molars in this model. Microarray analysis and semiquantitative RT-PCR demonstrated a significant increase in collagen I, integrin beta5, and SPARC gene expression as revealed by comparison between the unopposed molar group and the control group. Immunohistochemical verification revealed increased levels of integrin beta5 and SPARC labeling in the periodontal ligament of the unopposed molar. Together our findings suggest that posteruptive axial movement of teeth was accomplished by significant formation of new root cementum and alveolar bone at the root apex in tandem with upregulation of collagen I, integrin beta5, and SPARC gene expression.
Acid Phosphatase↗
Human mineralized bone in extraction sites before implant placement: preliminary results.
BACKGROUND: Bone loss after tooth extraction may prevent dental implant placement. Human mineralized bone grafts can be used to restore bone volume and allow for tooth replacement with dental implants. METHODS: The authors grafted 22 sites in 18 patients with human mineralized bone after tooth extraction. They allowed molar sites 16 weeks for graft healing, placed the implants and restored them with a final crown after a four-month integration period. Single-rooted maxillary sites received implants and immediate placement of provisional crowns or underwent a delayed two-stage restoration approach. The authors used radiographs and clinical examinations to evaluate the results. RESULTS: All of the sites were restored successfully with a single-tooth implant restoration. Periapical radiographs indicated that the crestal bone levels were limited to the first thread of the implants or slightly coronal to the first thread of the implant. Clinical evaluation indicated excellent gingival health around the provisional and final restorations, without obvious gingival migration. CONCLUSIONS: The use of human mineralized bone may have significant potential to reconstruct missing bone resulting from tooth extraction and to preserve bone after tooth extraction. In addition, healed bone graft sites seem to be able to support immediate placement of a provisional crown and implant restorations. CLINICAL IMPLICATIONS: Patients who are having teeth extracted may become candidates for implant restorations when the sites are appropriately grafted to preserve and reconstruct bone volume, thus allowing for more options for reconstructing the missing tooth site.
Alveolar Ridge Augmentation↗
Using a Hedström endodontic file to retrieve a root tip.
Explore the source record for details and available documents.
Dental Instruments↗
Sublingual hematoma formation during immediate placement of mandibular endosseous implants.
BACKGROUND: Sublingual hematoma during placement of mandibular endosseous dental implants is a rare, but potentially life-threatening, complication. The development of a sublingual hematoma during a dental procedure may result in the need for acute airway management, including intubation or even emergent tracheostomy. Dental implants are becoming a well-accepted treatment, and thousands of implants are placed every year by general practitioners and specialists, with few adverse sequelae. Clinicians rarely discuss this complication with patients before surgery, and no reports of death secondary to sublingual hematoma formation have been published. The incidence of this event is difficult to ascertain, and only, a few cases have been reported. CASE DESCRIPTION: A 56-year-old man with severe caries underwent multiple mandibular tooth extractions and alveoloplasty and received endosseous implants. During the surgical procedure, the patient developed a large sublingual hematoma that required hospitalization. CLINICAL IMPLICATIONS: Practitioners who perform implant surgery in the anterior mandible should notify patients of the potential risk of sublingual hematoma formation, and be able to manage acute airway issues that may result from this complication.
Airway Obstruction↗
Human histologic analysis of mineralized bone allograft (Puros) placement before implant surgery.
Because clinicians are placing more dental implants, it is becoming more important to maintain bone volume after tooth extraction. This article discusses the various bone-augmentation materials available to the clinician and illustrates a case report of particulate mineralized bone allograft (Puros) placement after extraction. Exposure of the grafted site after 5 months revealed a hard bony structure. Human histologic analysis at the light microscopic level revealed nonvital spicules of mature calcified bone having a highly organized matrix surrounded by viable noncalcified immature bone matrix, or osteoid. It was concluded that mineralized human allograft demonstrated the formation or remodeling of bone histologically and was clinically useful to maintain bone volume for implant placement after extraction. To the authors' knowledge, this is the first publication to demonstrate human histology of particulate mineralized bone allograft (Puros) after placement into an extraction site.
Alveolar Ridge Augmentation↗
Single-tooth replacements in the esthetic zone with an immediate function implant: a preliminary report.
Patients demand an economic, esthetic, and expedient fashion to replace teeth that are missing in the esthetic zone. The clinical response of a 1-piece spiral immediate-function implant was evaluated for this purpose. The implants were placed into immediate extraction sites as well as healed sites and were provisionalized, and patients were put into immediate function the same day as surgery. Sites that qualified for this technique were based on bone density. Bone density in combination with its aggressive thread design and conservative surgical osteotomy preparation produced a 98.8% success rate over a 3-year period for 86 patients.
Adolescent↗
Case report: use of an extraction site for implant placement.
This case report describes the use of an extraction site for placement of a critically important implant. This use solved an important functional and cosmetic problem in a dramatic and successful manner.
Blade Implantation↗
Immediate replacement of nonrestorable roots.
The following paper represents a case report describing procedures and techniques that have been successfully performed clinically over a period of 52 months. The intent of these procedures is to replace nonrestorable roots in fresh extraction sites with immediate fixture placement and provisional prosthesis placement at the time of fixture placement.
Adult↗
Osseous regeneration in compromised extraction sites: a ten-year case study.
One of the many problems facing surgeons is finding adequate bone sites for implant support. Without adequate bone, there can be implant failure or poor esthetic results. By using guided tissue regeneration (GTR) membranes and bone grafting materials, implants may be placed into immediate extraction sites and areas with large osseous defects with an expectation of long-term positive results. These concepts are illustrated by comparing the results of a ten-year follow-up evaluation of a patient lacking healthy bone at the implant site with another case in which the implant site had bone of acceptable morphology and density, with both cases showing similarly good results.
Absorbable Implants↗
Immediate implant loading: a case report.
The therapeutic goal of implant dentistry is not merely tooth replacement but total oral rehabilitation. Considering dental implants as a treatment option can provide patients with positive, long-term results. Implants have developed into a viable alternative to conventional prosthetic reconstruction of edentulous areas. They provide excellent support for fixed or fixed detachable appliances, which increases function compared with conventional complete dentures. Implant dentistry has gone through many phases over the years. Modern technology and design allows us to predictably place our dental implants in immediate extraction sites and often load the implants at the time of placement. Single tooth-by-tooth reconstruction provides easy access for the patient to floss and clean the areas compared with the relative difficulty in maintenance when crowns are splinted. This case study demonstrates full maxillary and partial mandibular reconstruction using dental implants. The implants were surgically placed immediately after extractions and loaded using a stable roundhouse composite temporary bridge. Following osseointegration, the implants were permanently restored with individual crowns.
Aged↗