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At least 1,477 records · Page 82Linked to original sources
PubMed2000

Irritation test of tissue adhesives for facial prostheses.

STATEMENT OF PROBLEM: Adhesives are commonly used to improve the retention of a facial prosthesis to the skin. Although no requirement exists for facial prosthetic adhesives, an adhesive should be nonirritating and nontoxic. PURPOSE: This study assessed the irritative potential of facial prosthetic adhesives by using an in vitro technique for detection of eye-irritating chemicals. MATERIAL AND METHODS: Ten adhesives were evaluated by the hens egg test chorioallantoic membrane method. Adhesives were applied to the chorioallantoic membrane in fertilized hen eggs, and the membrane examined by a photomacroscope for injury to the blood vessels. The average irritation score was calculated from the recorded times for the debut of hemorrhage, lysis, and coagulation, and the products were classified as being non, slight, moderate, or strong irritants, based on the irritation score. RESULTS: The predominant injury to the membrane was coagulation of blood vessels, and the exposure time needed to initiate the reaction was dependent on the composition of the product. Four products were classified as strong irritants, 1 as moderate, and the remaining 5 as slight or nonirritant. CONCLUSION: On the basis of a test for eye irritation, the irritant potential of tissue adhesives varied from non to severe. The most severe reactions were mainly seen in products containing the solvent ethyl acetate.

Acetates↗
PubMed2005

Rehabilitation of a bilateral maxillectomy patient with a free fibula osteocutaneous flap.

Rehabilitation of patients who have undergone bilateral maxillectomy is difficult because of extensive loss of bone and soft tissue. In this clinical report, prosthodontic rehabilitation of oral function in a bilateral maxillecitomy patient combined with a new fibular osteocutaneous flap, which was designed to have two oronasal slits for the retention of an obturator prosthesis, was described. A 58-year-old man with a maxillary alveolar carcinoma underwent bilateral maxillectomy. The defect was reconstructed using a vascularized fibular bone wrapped circumferentially with a peroneal flap, which was fixed with miniplates between the right malar prominence and cut edge of the left zygoma remaining two slits anterior and posterior to the graft. Two and half weeks after the surgery, a delayed surgical obturator was delivered and an obturator prosthesis was delivered 6 weeks after the surgery. This obturator prosthesis could be extended into the slits to engage the tissue undercuts, and was stable during use. Mastication, deglutition, articulation and the mid-facial profile of the patient were rehabilitated. After installation of the obturator prosthesis, relining of the prosthesis base was carried out alongside the healing process of the graft, and adjustment of occlusions and high-pressure spots was carried out. No clinical disorders were observed either in the grafted tissue or the obturator prosthesis with a 3-year prognosis. Newly designing a fibular osteocutaneous flap combined with tissue-borne obturator prosthesis is one successful approach to the restoration of oral function, and increases the patient's quality of life after bilateral maxillectomy.

Carcinoma, Squamous Cell↗
PubMed1998

Template for surgical crown lengthening: fabrication technique.

This article describes a technique for the easy fabrication of a template to facilitate surgical lengthening of the clinical crown to enhance esthetics and/or increase retention of a fixed prosthesis. The use of this surgical guide should result in more predictable clinical results.

Crown Lengthening↗
PubMed1991

A restorative-orthodontic treatment approach in the older patient.

This report presents a case requiring a combination of restorative dentistry and orthodontic treatment in a mature adult patient. Occlusal splint and periodontal therapies were used initially. Orthodontic treatment combined the use of the occlusal splint and fixed appliance in the maxillary arch. Sectional fixed appliances were used in the mandibular arch. The final restorations were fixed--movable bridges in the mandibular arch and a removable tooth and mucosally borne prosthesis in the maxilla. Retention of the orthodontic result was provided by the fixed prostheses in the lower arch and the continued wear of a full coverage maxillary occlusal splint at night served to prevent relapse of the upper teeth.

Dental Restoration, Permanent↗
PubMed1991

Yearly changes of limb alignment toward varus as measured by the femorotibial angle after total knee arthroplasty.

Total knee arthroplasty was performed in 126 knees of 104 patients, using either the UCI, the Kinematic Anteriorly Joined (K-AJ), or the Kinematic Posterior Cruciate Retention (K-PCR) prosthesis. The average patient age at the time of surgery was 59 years; the average follow-up period was 3.3 years. The UCI device was used in 25 knees, the K-AJ in 75, and the K-PCR in 26. Postoperatively, the femorotibial angle was measured yearly for a period of at least six years on an anteroposterior radiograph of the patient standing on one leg. The cases with the UCI prosthesis, with an average standing FTA of 175 degrees one year postoperatively, showed a gradual change of limb alignment toward varus. In contrast, in the cases with the K-AJ and K-PCR prostheses, with an average standing FTA of 172 degrees one year after surgery, limb alignment remained essentially unchanged throughout a long period of follow-up. The authors recommend that total knee arthroplasty be performed to achieve a postoperative femorotibial angle (standing) as close to 172 degrees as possible, which allows the mechanical axis of the lower extremity to pass through the center of the knee.

Adult↗
PubMed1989

Abutment tooth modification for removable partial denture therapy.

The primary purpose of removable partial denture (RPD) therapy is to preserve existing oral structures. To accomplish this goal, natural teeth are selected to provide the necessary support, bracing, and retention for the removable prosthesis. Unfortunately, the chosen abutment teeth rarely are able to perform their task without some modification, which usually involves altering the tooth's enamel surface or fabricating and placing a crown. This article discusses the criteria and technique used for these modification procedures.

Dental Abutments↗
PubMed1978

[Aspects of orthodontic-prosthetic planning in adults].

The introduction of firm fitting orthodontic appliances has increased considerably the treatment potential of adults. Many aesthetic and functional problems allow a more satisfactory solution through preparatory orthodontic treatment than was possible up to now by prosthetic means. Surgical measures can facilitate and complement this therapy. In addition dental orthopaedic measures must be stabilised by prosthesis for reasons of retention.

Adult↗
PubMedDate not supplied

Diverse applications of the osseointegration technique: the maxillofacial patient.

The maxillofacial patient faces many challenges that go beyond those of edentulism. These obstacles leave the patient handicapped and socially vulnerable. One of the greatest of these difficulties is retention of the craniofacial prosthesis. Ingenious strategies based on experience have provided limited success. For selected patients, however, the osseointegrated implant has largely eliminated this vexing technical predicament, thus freeing the patient to enjoy a more normal lifestyle. The treatment indications for this service, the remaining unresolved patient problems, the new planning criteria, and the requirement to document success all point to the need for well-validated instruments to measure the effectiveness of this newly augmented service.

Humans↗
PubMedDate not supplied

Console abutment loading in craniofacial osseointegration.

Retention of implant-supported facial prostheses presents challenges in design that may lead to use of freestanding abutments. This is particularly so in the midface and orbit. Individual implant success rates are lower in these regions, and bone remodeling capacity may be compromised by combined modality cancer therapy. The present study was undertaken to determine the variations in load delivery so as to compare the use of long cantilevers and offset abutments with freestanding axially loaded abutments. The study revealed not only that the loads delivered are not trivial, but also that the highest loads generated are frequently delivered at the cervix of the implant. The long cantilevers produced the highest laterally acting cervical loads, whereas the 30-degree and 60-degree Console abutments delivered the highest laterally acting cervical loads of all the Console abutments. The potential of long cantilevers and offset abutments to deliver significant loads should be considered when designing retention for a facial prosthesis.

Bone Remodeling↗
PubMedDate not supplied

Cement-retained versus screw-retained implant restorations: a critical review.

This article presents a comparison of screw-retained and cement-retained implant prostheses based on the literature. The advantages, disadvantages, and limitations of the 2 different types of restorations are discussed, because it is important to understand the influence of the attachment mechanism on many clinical aspects of implant dentistry. Several factors essential to the long-term success of any implant prosthesis were reviewed with regard to both methods of fixation. These factors include: (1) ease of fabrication and cost, (2) passivity of the framework, (3) retention, (4) occlusion, (5) esthetics, (6) delivery, and (7) retrievability. (More than 50 references).

Cementation↗
PubMed2006

[The SPI implant system: clinical experience and one-year results].

The new Swiss implant system SPI became available three years ago and is used in combination with fixed and removable prosthetic reconstructions. In a pilot study the clinical procedures were evaluated and data of prosthetic complications of maintenance service were collected. 25 patients participated in the study with a total of 79 SPI implants during the time period from 2003-2004. 37 implants were located in the maxilla and 42 implants in the mandible. Two implants failed during the healing period, but no loaded implant was lost. Thus, the survival rate was 97.5% (77/79). 44 implants supported a fixed prosthesis, including nine single crowns and 33 implants were used in combination with removable partial denture. Four implants were used with ball anchor retention, 29 with bar support. The ELEMENT implant with the low implant shoulder allows very good esthetics. Prosthetic complications and maintenance service during the first year of function was comparable with other implant systems. Since the design of the abutment screws, healing caps and screwdriver was changed, the system has become easier in its application.

Crowns↗
PubMed1999

[Implant-supported complete denture].

Total toothlessness too lately or wrongfully compensated remain at the origin of prosthetic problems often difficult to solve through conventional prosthesis. We shall explain the importance of implantology in this type of medication. After presenting the different solutions brought by the importance in the rehabilitation of toothless maxilla we shall describe the process of making a supra-implanted lower maxilla prosthesis. Applications and non-applications will be directed; then the different elements and stages of the making of this type of this mucous-membrane-held prosthesis will be described. The retention is assured by two hooks tightly clasped onto a crossbar supported by the implants.

Dental Implants↗
PubMed1993

Retention designs for bone-anchored facial prostheses.

A facial prosthesis can be retained by bone-anchored implants and by a retentive bar. Because tissue response is critical around the abutments, the retentive bar should be constructed so that it is comfortable, conveniently hygienic, and designed without compromising the contours of the prosthesis.

Ear, External↗
PubMed1997

Electrical discharge machining.

This article describes a laboratory technique of achieving the highest degree of passive fit of an implant-retained restoration using electric discharge machining (EDM). This process can save time by eliminating the need for conventional soldering procedures, increase the longevity of the restoration, and when used along with the clinical technique of fabricating a verification index, eliminate the clinical try-in phase.

Dental Casting Technique↗
PubMed2001

[Oral health of community-dwelling elderly. 2. The subjective aspect of oral health].

In this study oral health of elderly persons as perceived by the subjects was evaluated. Phenomena often mentioned were problems with chewing and biting, dry mouth, retention of food particles between teeth or below the prosthesis, (in edentates) sensitivity of teeth for warm or cold foods and (in edentates) lack of retention of the lower prosthesis. In a lot of persons these problems affect quality of life.

Aged↗
PubMed2000

The mandibular first premolar as an abutment for distal-extension removable partial dentures: a modified clasp assembly design.

Sound mandibular first premolars can be used as sole abutments for bilateral distal-extension removable partial dentures, if the denture is designed to minimise the torque applied to the abutment teeth. A simplified modification of the conventional torque-releasing clasp-assembly designs is suggested for these teeth. This modification entails a mesial rest on each abutment tooth connected to the distal proximal plate via a lingual bracing arm. A circumferential clasp arm is optional for buccal retention of the removable partial denture. As with conventional designs, the metal framework is designed to permit some rotational tissueward movement of the distal extension bases, yet not compromise the retention and stability of the prosthesis.

Bicuspid↗
PubMed1989

A sectional denture as the optimal prosthesis.

A case is described where because of various local factors--anterior ridge loss, Class III skeletal relationship, survey lines, appearance, retention and support problems--a sectional prosthesis was found to be the optimal restoration.

Adult↗
PubMed2004

Prosthetic rehabilitation of edentulous patients with cleft palate.

In this work a description of prosthetic treatment of the edentulous patient with cleft palate was showed. Although positive results of surgical treatment diminish the number of these patients, more than once a dentist has to treat effectively patients in their fifties, sixties and seventies whose cleft palate was not treated with modern methods. Authors describe prosthetic solution which enables removing part of acryl from prosthesis and making air chambers. Diminishing of obturator prosthesis mass increases stabilization and retention and contributes to easier adaptation of prosthetic restoration.

Cleft Palate↗