Search PubMed⌕ Search

SEARCH · Search PubMed

Results for “Prosthesis Retention”

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 1,387 records · Page 77Linked to original sources
PubMed2002

Closed-field titanium magnets for the retention of complex craniofacial prostheses.

Where reconstruction with autogenous tissue is contraindicated in craniofacial reconstruction, or declined by the patient, a prosthesis may be used. Originally made from latex, cellulose or acrylic resins, prostheses are now largely made of silicone. These prostheses were traditionally retained using adhesives, natural undercuts at retention sites or spectacles. However, these methods were unsatisfactory because of frequent loss of retention, skin reactions to adhesives or unnatural movements of the prosthesis. Osseointegration became a popular method of prosthesis retention, initially using a bar-and-clip device. The use of a bar attached to the implant has certain shortcomings, however, including rigidity of the prosthesis and the difficulty in maintaining hygiene at the implant site. We present our experience with the use of magnets to hold the prosthesis in place, which allows ease of use, improved hygiene and a more natural mobility of the prosthesis.

Adolescent↗
PubMedDate not supplied

[Retention of a complete denture by the enclave method. Convergent enclaves].

The authors propose a technical variant of the method of enclaves for the retention of the full denture, this in the inferior maxilla because it is there that the problem of retention is posed with the greatest acuity and frequency. But whereas in the processes described the enclaves, 2 in number, corresponding with the zone of implantation of the canines, are perpendicular to the mandible in the frontal and sagittal planes, in the technique explained here each of the enclaves makes with the mandible, in the frontal plane, an angle of 10 degrees with respect to the median axis, thus leading to a convergence and hence an increased retention of the prosthesis with which they are connected.

Denture Precision Attachment↗
PubMed1993

Clinical applications of a polyphosphazene-based resilient denture liner.

The use of resilient denture liners provides an invaluable modality in removable prosthodontic treatment. Treatment of atrophic mandibles, preoperative and postoperative soft tissue management, and retention of removable prosthesis are a few applications of these materials. This article describes the clinical application of a polyphosphazene-based liner (Novus, Hygenic Corp, Dayton, OH) as a denture liner and retentive material in conventional and implant overdenture rehabilitation.

Dental Implants↗
PubMed1993

Prosthetic complications of extraoral implants.

The use of tissue-integrated fixtures for the retention of an extraoral prosthesis has simplified the placement, removal, and cleaning of the prosthesis by the patient. Tissue evaluation, structural designs, and retention mechanisms, combined with patient compliance and the ability to perform hygiene around retentive substructures, has produced an array of new problems. Clinical and technical problems are presented with techniques used in their resolution.

Eye, Artificial↗
PubMed2005

Fabrication of a surgical template for implant/bar-retained mandibular overdentures.

To achieve long-term success with an implant-retained overdenture, application of force in the path of insertion of the prosthesis has been recommended. This implies that the retentive matrices and the implants are positioned parallel to each other and to the path of insertion of the prosthesis. This article describes a technique for the fabrication of a surgical template for an implant-retained overdenture in the mandible. Adherence to the guidelines proposed in this article will lead to optimal implant placement in a consistent and repeatable manner.

Dental Implants↗
PubMed1996

Craniofacial osseointegration of a large midfacial bone-anchored combination maxillofacial prosthesis: a clinical report.

The combination of retentive clips and magnets has been used with favorable results for smaller facial prostheses. This patient's large midfacial defect created the need for an attachment design that would retain an intraoral obturator prosthesis and a large silicone facial prosthesis. The advantages of this design include having an obturator that is separately attached by clips to the framework. This allows the patient more ease in insertion and removal of the prosthesis. It also allows for better oral hygiene. The magnets aid the patient in the proper alignment of the facial prosthesis. The O-ring attachment was not a complicated technique in this patient's treatment. The patient can, without the use of a mirror, snap the rubber matrix O-ring attachment over the patrix attachment on the framework. This resulted in a retentive facial prosthesis, which helped the patient feel more secure. The silicone margins were well adapted to the patient's skin, which allows the use of thin translucent margins and the elimination of the inherent problems associated with the use of adhesives.

Frontal Bone↗
PubMed1997

An implant-supported fixed-removable prosthesis with a milled tissue bar and Hader clip retention as a restorative option for the edentulous maxilla.

Restoration of the edentulous maxilla with implant retained and supported prosthesis is challenging because of inherent anatomic limitations present after the loss of teeth. A fixed-removable prosthesis is one treatment choice for restoration of the edentulous maxilla with implants. This prosthesis meets the requirements for esthetics, phonetics, comfort, and hygiene, as well as favorable biomechanical stress distribution to the implants. This article presents a procedure for fabrication of a fixed-removable prosthesis with a precision milled bar, Hader clip attachments, and a superstructure prosthesis. The criteria for patient selection and the advantages and disadvantages of this prosthesis are discussed.

Centric Relation↗
PubMed2003

Tooth-supported stud-retained prostheses: three case reports.

The use of teeth as overdenture abutments is a common form of treatment. However, most roots are used only fur support. Simple stud precision attachments will also aid the retention of the prosthesis. This article presents three different cases where studs have been used to help retain removable prostheses.

Dental Abutments↗
PubMed1998

Infection after total elbow arthroplasty.

The purpose of this study was to review our experience with the treatment of twenty-five infections (in twenty-five patients) after total elbow arthroplasty and to examine indications for salvage of the prosthesis compared with those for resection arthroplasty. The patients were divided into three groups on the basis of treatment. Group I comprised fourteen patients who were managed with multiple, extensive irrigation and debridement procedures with retention of the original components. The primary indication for retention of the prosthesis was evidence that it was well fixed as determined both radiographically and intraoperatively. Group II comprised six patients who had removal of the prosthesis and debridement followed by immediate or staged reimplantation. Group III comprised five patients who were managed with resection arthroplasty. The infection was successfully eradicated in seven of the fourteen elbows that had salvage of the prosthesis with irrigation and debridement. The results were strongly dependent on the causative organism; attempts at debridement failed in the four elbows that were infected with Staphylococcus epidermidis compared with three of the ten that were infected with another organism. Four of the six patients in Group II had successful reimplantation of a prosthesis; in three, the infection had been caused by an organism other than Staphylococcus epidermidis. Only one of the three patients who had a Staphylococcus epidermidis infection had a successful reimplantation. None of the five patients who had a resection arthroplasty had signs of infection at the latest follow-up examination. We concluded that salvage of the prosthesis with extensive irrigation and debridement in the presence of an infection about the elbow can be reasonably successful if the infecting organism is not Staphylococcus epidermidis and if the components are well fixed. When removal of the components is warranted, staged reimplantation can also be highly successful when the infecting organism is not Staphylococcus epidermidis. However, the repeated operations necessary to retain a prosthesis and the high rates of complications seen with this approach--and the relatively good rates of satisfaction obtained with resection arthroplasty--suggest that resection arthroplasty remains the procedure of choice in medically frail patients or in patients for whom function of the elbow is less of a concern.

Adult↗
PubMed1992

Orbito-palpebral reconstruction in anophthalmos and severe congenital microphthalmos.

In patients with congenital anophthalmos and severe microphthalmos, a tiny orbit and socket exist with little eyelids, frequently preventing retention of a standard conformer or prosthesis. Socket expansion is sometimes impossible with microorbitism; the retention of a prosthesis is also difficult when malformations of the eyelids exist. The treatment of these difficult cases includes three stages. The first stage is orbital expansion that depends on the cephalometric studies of the patient: transverse osteotomy on the maxilla and the zygomatic bone with lateral bar by extracranial route, vertical osteotomy on the roof of the orbit by intracranial route. In some cases, the osteotomy includes expansion in the transverse and vertical diameter with bone grafts in the defects and on the lateral and superior rims. Simultaneously, socket expansion is performed by incision of the conjunctival sac circumferentially, with mucosal or split skin grafts on a conformer. The second stage includes eyelid reconstruction by different flaps. A third stage is frequently needed for correction of eyelid malposition on the prosthesis: ptosis, entropion surgery. Two cases of congenital anophthalmos are reported. Methods and indications of treatment are discussed.

Adolescent↗
PubMed1986

An esthetic removable partial denture retainer for the maxillary canine.

The use of a distofacial ridge on a maxillary canine abutment for a distal-extension base of a removable partial denture is described. The distofacial ridge will permit the placement of a less conspicuous I-bar arm on the distofacial surface of the tooth. The ridge provides bracing against distal movement during function and thus prevents the subsequent loss of retention for the prosthesis. It also permits a more precise path of insertion and withdrawal for the prosthesis. Three methods of establishing a distofacial ridge on a canine abutment are described.

Composite Resins↗
PubMed1999

Retention force of magnets in endosteal implants used for facial prosthesis.

This study reports on forces generated by magnets to retain facial prostheses. The retention force was measured in cylindrical magnetic inserts and in telescope magnetic inserts. The forces between insert and secondary magnets were measured at different angles. The mean force in the axial direction was 1.8 N. The force decreased as the angle between force direction and insert-axis increased. The results will help clinicians to insert implants in an optimal position when using them to retain facial prostheses.

Analog-Digital Conversion↗
PubMed1998

Mobility of the obturator prosthesis in hemimaxillectomy edentulous patients.

In edentulous patients with maxillary defects, it is difficult to obtain sufficient retention, support, and stability of the obturator prosthesis, in addition, its mobility during various functions is considered to be large. A thorough understanding of the mobility of the obturator prosthesis is important to achieve successful results in the patient's oral rehabilitation. In this study, the ranges of movement of the obturator prostheses in three hemimaxillectomy edentulous patients were compared during tapping, chewing (biscuit), and opening and clenching jaw movements by simultaneously conducting three-dimensional measurements of three points that were established on the central incisor and the right and left first molars of the obturator prosthesis with a jaw movement tracking device having six degrees of freedom. This study indicates that the range of movement of the obturator prosthesis varied extensively from individual to individual. The ranges of movement were larger than those of normal complete dentures and differed considerably from each other when categorized according to the three functions and three measuring points in the patients.

Aged↗
PubMed1989

[Retention of Pt-Co magnet for dental prosthesis].

Though Pt-Co magnet is inferior to rare-earth magnet in magnetic properties, the magnet is much superior to the corrosional resistances in oral fluids. The purpose of this investigation was to determined the retentive characteristics of Pt-Co magnet. The break away force between the magnet and XM27 stainless steel keeper were measured. The retention of phi 4x 1.5 mm Pt-Co magnet was 49 g. This retention could be increased to 172 g by using stainless steel cup type yoke. These retention were rather small, but if 3 or more couples of attachments or larger Pt-Co magnet attachment were fixed in denture, the retention level approach that of clasp or mechanical precision attachments.

Cobalt↗
PubMed2002

Hydroxyapatite prosthesis extrusion.

OBJECTIVE: To examine the mechanism of prosthesis extrusion and evaluate preoperative and postoperative variables associated with extrusion of hydroxyapatite prostheses for ossicular reconstruction. STUDY DESIGN: Retrospective case review. SETTING: Tertiary referral, university medical center. PATIENTS: Patients undergoing ossiculoplasty with a hydroxyapatite prosthesis and having at least six months follow-up. MAIN OUTCOME MEASURE: Prosthesis extrusion, defined as loss of the tympanic membrane resulting in exposure of the prosthesis. Extrusion is further classified into early (< 2 months) and late (> 6 months). RESULTS: Early extrusion or tympanoplasty graft failure occurred in 15/195 cases (8%). Late extrusion was seen in 17/125 cases (14%). Cases exhibiting late extrusion had a significantly greater incidence of postoperative atelectasis (p < 0.0001), recurrent otitis media (p < 0.0001), and myringitis (p = 0.003) than those with retention of the prosthesis. Regression analysis found an abnormal contralateral ear increased the risk of postoperative recurrent otitis media, while staged surgery reduced the risk, odds ratios of 3.56 (95% confidence interval 2.20-9.37) and 6.84 (95% CI 4.24-17.76) respectively. There were no preoperative variables that predicted postoperative atelectasis or myringitis. CONCLUSIONS: Recurrent otitis media, myringitis, and atelectasis developing after ossiculoplasty are associated with a greater risk of prosthesis extrusion. Predicting postoperative complications from preoperative and intraoperative findings proved difficult. Measures to prevent atelectasis, such as covering the prosthesis with cartilage, are recommended at the time of ossiculoplasty.

Cartilage↗