[Function and stress on the underlying tissues in total prosthesis].
Explore the source record for details and available documents.
Atrophy↗
SEARCH · Search PubMed
Results for “Mandibular Prosthesis”
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 successful mandibular implant denture--part one.
Explore the source record for details and available documents.
Aged↗
Implant rehabilitation of mandibular posterior edentulous quadrants.
Explore the source record for details and available documents.
Bicuspid↗
Mandibular reconstruction and rehabilitation in childhood.
The management of a case of osteosarcoma of the mandible in an 7-year-old girl is presented. A variety of reconstructive techniques were used following surgical ablation of the tumour, including the use of a revascularised free bone flap and osseointegrated endosseous implants.
Child↗
Treatment concept for mandibular overdentures supported by endosseous implants: a literature review.
Edentulous patients with a severely resorbed mandible often experience problems with their dentures. Treatment concepts involving two to four implants for the support of an overdenture have been proposed. The aim of this study was to develop a treatment concept for mandibular overdentures supported by endosseous implants based on a review of the literature. It is proposed that two implants supporting a mandibular overdenture (bar construction) are sufficient for most applications. Four implants were indicated in situations involving a dentulous maxilla, a narrow mandibular arch, extreme resorption of the mandible (bone height greater than 12 mm), and mandibular soreness and pain.
Bone Resorption↗
The effect of mandibular overdenture to manage trauma to anterior maxillary residual ridge.
Residual alveolar ridge changes brought on by bone loss has always been one of the great problems related to denture prosthesis. The changes beneath denture bases has been investigated and the agreement on individual difference on the rate of bone resorption has been proven. Clinical experience and studies gave great knowledge of the prosthetic factors which influence bone resorption. It has been proved that excessive pressure, and shearing forces are the main causes of ridge changes. Very common is the problem associated with patient having only natural mandibular anterior teeth occluded with complete upper denture. The anterior maxillary region is the weakest area in the upper arch to resist stress when the lower natural anterior teeth occlude anterior to the basal support; trauma is inevitable.
Alveolar Bone Loss↗
A 5-year longitudinal study of cantilevered fixed partial dentures compared with removable partial dentures in a geriatric population.
Prosthesis function and dental conditions were observed for 5 years in 27 elderly patients treated with mandibular cantilevered fixed partial dentures (FPDs) and in 26 elderly patients treated with distal-extension removal partial dentures (RPDs). All patients were treated with a complete upper denture. The patients were assigned randomly into two treatment groups that had the same composition with regard to sex, age, and distribution of teeth. The patients were under supervised oral hygiene and prosthodontic care. Clinical examination of prostheses, masticatory system, periodontal status, and caries was carried out yearly. Oral hygiene was good, and the periodontal status was maintained in both groups. Caries was observed six times more frequently in the RPD group than in the group with fixed restorations, however. Occlusal and functional conditions deteriorated in the RPD group only. Eight of 42 fixed partial dentures (19%) failed; of these, six were recemented with composite resin. Generally the need for dental and prosthetic follow-up treatment was more pronounced in the RPD group than in the FPD group.
Aged↗
Factors associated with soft- and hard-tissue compromise of endosseous implants.
This prospective analysis identifies factors associated with endosseous implant removal as well as factors associated with implant morbidity resulting in nonscheduled patient visits. Treatment of the latter conditions is discussed. The most important factors identified for implant success were surgery without compromise in technique, placing implants into sound bone, avoiding thin bone or implant dehiscence at the time of implant placement, avoiding premature implant exposure during the healing period, establishing a balanced restoration, and insuring appropriate follow-up hygiene care. In the posterior mandible, the presence of keratinized gingiva was strongly correlated with optimal soft- and hard-tissue health.
Alveolar Process↗
Condylar replacement alone is not sufficient for prosthetic reconstruction of the temporomandibular joint.
Prosthetic reconstruction of the temporomandibular joint (TMJ) is a controversial method of treatment. This paper presents 2 cases that illustrate the problem with prosthetic reconstruction of the condylar head with no fossa reconstruction. In both cases, severe erosion and heterotopic bone formation occurred, and the patients underwent installation of total TMJ prostheses to replace the previous, partial ones.
Arthroplasty, Replacement↗
Scanning electron microscopic observations of 'fractured' biodegradable plates and screws.
BACKGROUND: We encountered two out of 100 cases in which implanted biodegradable plates and screws had fractured within 1 month postoperatively. MATERIAL: Failure of the material was confirmed through clinical symptoms, radiographs or CT findings. In addition, four specimens obtained from these two cases were examined with regard to their ultrastructure using scanning electron microscopy. RESULTS: Several principal patterns of the fractured surface were found: (1) gradual cracking, i.e. 'circular stair' and, (2) tortuous threads, i.e. a wavy line. It is conceivable that the material may not have been hit by major sudden forces but a disproportion between the thread configuration and the drilled hole may have led to screw loosening and torsion. Subsequently, the threads were deformed in a 'wavy' manner, finally leading to cracking and fracture of plates and screws. Fractures of plates and screws due to these instabilities are thought to be distinguishable from material resorption. CONCLUSION: In the application of biodegradable materials, more than two screws per single bone segment should be used as a principle of plate-fixation technique in order to avoid a stability-compromising situation, particularly in the stress-bearing areas of the maxillofacial region. Moreover, three-dimensional fixation using more than two plates is recommended in the facial skeleton e.g. zygomatic tripod. Intermaxillary fixation should also be considered to reinforce initial stability in stress-bearing areas.
Absorbable Implants↗
Type II autosomal dominant osteopetrosis (Albers-Schönberg disease): clinical and radiological manifestations in 42 patients.
Type II autosomal dominant osteopetrosis (ADO II, Albers-Schonberg disease) is a genetic condition characterized by generalized osteosclerosis predominating in some skeletal sites such as the spine and pelvis. ADO II is rare, and most available clinical descriptions are based on small numbers of patients. We report the clinical and radiological manifestations in 42 ADO II patients. To our knowledge, this is the largest series reported so far. Our inclusion criterion was presence on radiographs of the spine of vertebral endplate thickening, producing the classic sandwich vertebra appearance. We found various patterns of sandwich vertebra, of which we provide a description to assist physicians in diagnosing ADO II. The classic bone-within-bone appearance was present in most but not all skeletal sites. The radiological penetrance of the disease was high (90%) and increased after 20 years of age. As many as 81% of our patients experienced clinical manifestations. Fractures were common (78% of patients) and healed slowly. Hip osteoarthritis developed in 27% of patients and required arthroplasty in 9 of the 16 affected hips. Nonmandibular osteomyelitis occurred in 4 cases (11%). Twenty-four percent of patients had thoracic or lumbar scoliosis. Orthopedic surgery was performed in 52.8% of patients, of whom half had at least three surgical procedures for internal fracture fixation, arthroplasty, limb deformity correction, or treatment of surgical complications. There was a high rate of surgical complications including nonunion, infection, prosthesis loosening, and intraoperative fractures. Nearly two-thirds of patients (64%) had stomatologic manifestations, including mandibular osteomyelitis in 4 patients (11%). Cranial nerve involvement responsible for hearing loss, bilateral optic atrophy, and/or facial palsy was present in 14 patients but was clearly attributable to ADO II in only 6 cases (16%). This large series sheds new light on several aspects of ADO II, most notably the possibility of severe clinical complications. Although other forms of osteopetrosis are considerably more severe, the name "benign osteopetrosis" previously used for ADO II is probably a misnomer.
Adolescent↗
Mandibular flexure and dental implants: a case report.
The mandibular deformation as a result of jaw movement from rest position has been studied and documented by other authors. Here, we report that there is a possible correlation between this phenomenon and the discomfort experienced by a patient rehabilitated with implant-supported restoration for the mandibular arch during function. The recovery from pain and symptoms was achieved only after splitting the prosthesis into three sections. This case report serves to remind clinicians of the importance of following biological concepts as the key to a successful result.
Adult↗
Prosthetic rehabilitation of a bone defect with a teeth-implant supported, removable partial denture.
The use of teeth-implant, mucosa-supported removable dentures for rehabilitation of partially edentulous patients involves highly complex biomechanical aspects. This type of prosthesis associates 3 kinds of support that react differently to the functional and parafunctional forces developed in the oral cavity. Although the construction of removable partial dentures may seem paradoxical when osseointegrated implants are placed, in some cases, this option is an excellent alternative to solve difficulties related to the anatomic, biologic, psychomotor, and financial conditions of the patient. This article reports on a case in which a teeth-implant, mucosa-supported removable partial denture was the option of choice for a patient with financial and anatomic limitations, having a large structural loss of the residual alveolar ridge caused by trauma by a gunshot injury at the mandible. The 5-year follow-up did not reveal any type of biomechanical or functional problem.
Adult↗
ITI implants and Dolder bars in the treatment of large traumatic defect of mandible: a clinical report.
The development of more sophisticated implant techniques to produce satisfying results improves the precise planning of both the surgical phase of the implantation and the following prosthetic rehabilitation. Ball and bar attachments are the main retainer systems for implant-bearing overdentures to achieve a successful treatment in the partial or full edentulism. In this clinical report, a 23-year-old male patient, presented with a large traumatic defect in the anterior mandible, was treated with ITI implant and ITI Dolder bar combinations. The reason to prefer this kind of treatment depends on the highest retention capacity and cleaning facilities of the system.
Adult↗
Post-extraction remodeling of the adult mandible.
Following tooth loss, the mandible shows an extensive loss of bone in some individuals. This may pose a significant problem in the prosthodontic restoration of function and esthetics. The many factors which have been proposed as being responsible for the inter-individual variation in post-extraction remodeling mean that a perfunctory analysis of the literature, in which well-controlled, relevant studies are scarce, may not provide the whole story. This article reviews the local and systemic factors which may play a role in the post-extraction remodeling of the mandible. Since severe residual ridge resorption may occur even when the bone status in the rest of the skeleton is good and vice versa, it is concluded that local functional factors are of paramount significance. It is now essential to determine how they can be modified and applied to help maintain ridge height and quality in our aging, edentulous population.
Adult↗
Fibular and iliac crest osteomuscular free flap reconstruction of the oral cavity.
A method for reconstruction of oral cavity soft tissues using segmentally or axially supplied free muscle flaps harvested as a unit with their bone components is presented. Both fibular/soleus and iliac crest/internal oblique free flaps are documented, and the pros and cons of each donor site are presented. Twenty-one patients, 17 with cancer or osteoradionecrosis and 4 with benign or congenital conditions of the mandible, have undergone this operation. Ten bone grafts were simultaneously embedded with osseointegrated implants. All free flaps except one survived and resulted in a smoothly mucosalized oral lining. Six patients have had their implants successfully uncovered, all of whom are wearing prostheses. Four other patients are using tissue-borne prostheses. Transfer of free, nonbulky muscle flaps for mucosalized oral soft-tissue reconstruction is feasible in selected patients using first the fibular and, second, the iliac donor site; this soft-tissue technique also contributes to prosthetic dental rehabilitation.
Adolescent↗
Reconstruction of the severely resorbed atrophic edentulous ridge of the maxilla and mandible for implant rehabilitation: report of a case.
We describe a case with a severely resorbed atrophic edentulous ridge in both the maxilla and mandible. The maxilla was reconstructed using a sinus-lifting procedure and onlay bone graft. The mandible was reconstructed by anterior osteotomy with an interpositional sandwich iliac bone graft at the symphysis area, subperiosteally with iliac bone chips mixed with hydroxylapatite bilaterally at the posterior atrophic ridge, and vestibuloplasty with a split thickness skin graft (STSG). After full-mouth implant rehabilitation, a 5-year follow-up of this case shows a satisfactory result.
Aged↗
Development of a static and dynamic simulator for osteosyntheses of the mandible.
The development of new methods and materials for osteosynthesis requires in vitro testing prior to clinical use to exclude major problems or difficulties. In the field of oral and maxillofacial surgery no standardized testing procedures have so far been established. From a biomechanical point of view the lower jaw can be described as a lever that during the chewing cycle various forces at various points of the bone act upon. Standardized solid foam polyurethane mandibles (Sawbones, Malmö, Sweden) were used for the testing of various types of screws and different types of fractures. Via linkages that were connected to hydraulic cylinders defined forces were exerted on the polyurethane mandibles and the deformation was registered depending on the force. Monitoring was carried out contactless and therefore without back coupling by the use of a video system that recorded well-defined points on both sides of the fracture line. The photographs were then evaluated by special software (SIMI MOTION CAPTURE). The control of the cylinders was performed through a processor that besides static forces also allowed dynamic testing (e.g. sinusoid oscillation with defined amplitude and number of cycles). For the standardized and realistic three-dimensional static or dynamic testing of new methods and materials for osteosynthesis of the lower jaw this test stand has proved to be optimally suitable. Independent on the type of fracture and the material used the field of application for our test stand is the complete lower jaw. Therefore an ethically correct and economically reasonable testing of industrial products and clinical methods of osteosynthesis can be performed with this simulator.
Absorbable Implants↗