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At least 163 records · Page 9Linked to original sources
PubMed1977

The acrylic removable partial denture.

Some aspects of acrylic partial dentures have been reviewed. The spoon denture, the Every design, and the Lam design have been discussed and suggestions made for their construction and use for patients with specific problems.

Acrylic Resins↗
PubMed1984

Treatment of open occlusions with onlay and overlay removable partial dentures.

The onlay removable partial denture has the primary purposes of restoration of esthetics and function through a conservative modification of the existing dentition. It is particularly applicable to open occlusion situations and in improving an uneven mandibular occlusal plane. Its use should be supplemented with specific instructions in proper cleansing and maintenance of underlying dentition and the prosthesis and with scheduled recall appointments.

Denture, Overlay↗
PubMed1994

Button versus buttonless castings for removable partial denture frameworks.

Casting removable partial dentures (RPDs) without completely filling the sprue channels and generating casting buttons would result in saving metal and making more defect-free castings. This investigation tested whether a complete and sound RPD casting can be obtained when a minimal amount of metal is used. A factorial experimental design, three spruing methods, two metal feeding directions, and two different weights of metal were used to cast 60 Kennedy class II, modification 1 RPDs. The metal used to cast each framework was either enough to result in a full button or in no button. Visual and radiographic examinations and counting of defects were made by two independent operators who were unaware of the spruing method, feeding direction, or amount of metal used to make the framework. The completeness of the casting and the presence of porosities were evaluated for clasps, major connectors, and meshworks. The use of minimal metal to cast RPDs was equally as successful as using enough for a full button, provided that the appropriate spruing arrangement and metal feeding direction were chosen. Indirect metal feeding for maxillary RPDs was successful with the proper spruing arrangement.

Chromium Alloys↗
PubMed2001

Technique for fabricating a prosthetic tooth on a removable partial denture framework.

When removable partial dentures are fabricated, a custom-made tooth may be needed to fill a space too small or irregularly shaped to allow the use of a prefabricated prosthetic tooth. This article describes a simple technique in which visible light-polymerized composite is used to custom build a prosthetic tooth that is both esthetic and durable.

Composite Resins↗
PubMed1996

A new design for partial denture circumferential clasp arms.

Partial dentures made from cast cobalt chromium alloys suffer from inadequacies of the retentive spring members. With similar devices made from Type 4 gold alloy, the retentive members are considered satisfactory. Analyses of the combined modulus and strength properties of the alloys show that the lower modulus of elasticity of the gold doubles its overall effectiveness in spring members such as retentive clasp arms. To match this, the strength of cobalt chromium alloys must be doubled. Since this appears unlikely, improvement to the design of the spring members is the only way to rectify this problem. Retentive clasp arms are required to have adequate elasticity to deflect out of the retentive undercut, adequate stiffness to produce retention and adequate strength to resist accidental damage. Current designs have no published rational basis to meet these requirements, and appear far from ideal. An analysis of the forces applying to clasp arms and design for uniform stress along the arm produced a shape which differs substantially from the currently used conical taper. The cross-section dimensions are related to the angular distance from the tip of the clasp. A theoretical comparison of the difference between the theoretical and current designs cannot be made as the current design for tapered clasps is not specific. It is proposed that improved performance over present clasp designs can be obtained by using clasps of the derived shape. However, the manufacture of clasps of the required complex shape and variable size is impractical, and the next best alternative of clasps of constant cross section along their length was examined. Deflection calculations for this form showed that the loss of deflection in using a clasp of constant cross section instead of the ideal was only 23 per cent. It is proposed that clasps of constant cross section along their length, with a thickness chosen according to the size of the tooth used for the undercut, will present a significant improvement in clasp performance. Further, it will provide a systematic method of selecting clasp thickness which is not presently available.

Algorithms↗
PubMed2004

Swallowed partial dentures.

Swallowed or inhaled partial dentures can present a diagnostic challenge. Three new cases are described, one of them near-fatal because of vascular erosion and haemorrhage. The published work points to the importance of good design and proper maintenance. The key to early recognition is awareness of the hazard by denture-wearers, carers and clinicians.

Deglutition↗
PubMed1995

Removable cast partial dentures.

In planning treatment for partially edentulous patients, the dentist is often confronted with conditions that preclude fixed prosthodontics. In these instances the cast removable partial denture is often the alternative of choice. In planning and producing a removable partial denture that will be most satisfactory, a systematic evaluation at the very beginning of treatment can prevent many problems that often occur when planning is limited.

Dental Clasps↗
PubMed1983

Evaluation of a fixed removable partial denture: Andrews Bridge System.

Fixed removable partial dentures are particularly indicated for patients with extensive supportive tissue loss and when the alignment of the opposing arches and/or esthetic arch position of the replacement teeth create difficulties. The Andrews Bridge System is one solution. When the oral architecture permits the construction of either a fixed partial denture or a fixed removable partial denture, the decision depends on specific clinical factors and the desires of the patient.

Bone Resorption↗
PubMed1990

[Designing of partial dentures with free end saddles].

Partial dentures with free end saddles, classified as K I and II present special design problems because of the different properties of tooth support and mucosa support. The main principle is that strait saddles are designed as tooth-born, however in curved saddles tooth and mucosa-born dentures are preferred. The article describes so called "altered cast" clinical and laboratory procedure which prevents rocking of the denture around the fulcrum line in patients with resilient alveolar ridge mucosa. Besides that some typical designs of partial dentures are presented.

Denture Design↗
PubMed1989

[Horizontal stress of abutment. Particularly regarding difference in removable partial denture design].

Prosthesis with removable partial denture is a daily clinical procedure for compensating the morphological loss and hypofunction of teeth and various gnathostomatic system. The removable partial denture not only comprises of many elements such as denture base, abutment and clasp but accordingly has to undergo morphologically complicated operative process, thus posing many factors concerning the functional stability coping with diverse masticatory motions. However, from the fact that retention and stability of the denture at it's functioning are obtained basically from it's connection with abutment, assessments in multiple aspects have been made regarding the influence exerted on abutment by difference in the structural elements, i. e. clasps, which transmit the movement of denture directly. There were the assessments by means of the displacement, measuring system by the use of microdial gage, stereoscopic camera, eddy currents transfer, and magnetic resistant element, and deformation measuring systems such as photoelasticity method, holography, moiré method and strain gage method. However, these systems are the methods for assessing abutment as subject but not the assessing system including all the basic structural elements of denture. Therefore, the author has made observation of the influence exerted on the dynamics of abutment by the difference between clasps in 2 kinds and by cross arch stabilization by designing aker's clasp and RPI clasp for the abutment by the use of cast frame standardized.(ABSTRACT TRUNCATED AT 250 WORDS)

Dental Abutments↗
PubMed1995

Removable partial denture production in western Germany.

Removable partial denture production in western Germany was studied by analyzing 1,082 photographs taken in consecutive series at five large dental laboratories. The photographic technique was standardized, enabling evaluation of the casts as well as the design of the dentures. Of the casts, 47.2% were maxillary and 52.8% were mandibular. The mean number of teeth present was 6.29 in the maxilla and 6.57 in the mandible. In the maxilla, 52.9% of the molar regions were edentulous; i.e., they had distal-extension free-end spaces. The corresponding figure for the mandibles was 72.7%. Most of the maxillary removable partial dentures had a palatal strap or a palatal plate, and most of the mandibular dentures had a lingual bar. Of the removable partial dentures, 53.1% were retained by telescopic crowns, 15.3% had precision attachments, and 36.1% were retained by clasps only.

Crowns↗
PubMed1993

Removable partial denture framework try-in.

Removable partial denture frameworks must fit accurately to function properly and not cause injury to remaining teeth or soft tissue. This article presents a logical method and rationale for seating a removable partial denture framework and a review of several disclosing media used in the try-in procedure.

Acrylic Resins↗