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PubMed1983

Prosthodontic management of the hydroxylapatite denture patient: a preliminary report.

A 4-year study and evaluation of nonresorbable hydroxylapatite to augment different alveolar ridges has been reported. The technique used resulted in improved contour, height, and width of the alveolar ridge. It was found that denture comfort improved with ridge augmentation as this allowed improved stability, support, and preservation of the ridge. Patient satisfaction was correlated to both surgical and prosthodontic success with the use of hydroxylapatite. The state and health of the tissues were found to be improved with the use of hydroxylapatite or hydroxylapatite and bone marrow. The prosthetic and surgical procedures were found to be easier to perform, and they produced more permanent and superior results than those previously experienced with only bone grafts and other alloplasts.

Adult↗
PubMed1983

Definitive prosthodontic therapy for TMJ patients. Part I: Anterior and posterior condylar displacement.

The final prosthodontic treatment procedure for anterior condylar displacement (functional centric relation) has been described. Deflective interferences in centric relation were removed and a removable partial denture constructed to the classical most retruded centric relation position of the mandible. Several patients with posterior condylar displacement (dysfunctional centric relation) have been documented. Anterior condylar repositioning was accomplished on a denture patient by merely establishing the correct vertical dimension of occlusion. Another patient required an increase in vertical dimension as well as anterior condylar repositioning.

Acrylic Resins↗
PubMed1984

Removable prosthodontic treatment needs: a survey.

Population data on complete and removable partial prosthodontics in Iowa indicated the following. Denture wearers tend to be persons in the older age groups. The percentage of edentulous persons was lower than that reported nationally in 1971. Of every 1,000 persons, 156 were wearing dentures in one or both arches. Of every 1,000 persons, 53 needed a repair, reline, or replacement of an existing denture. Of every 1,000 persons, 70 needed a denture but were not wearing one. Persons of lower income and education were less likely to seek dental care but had the greatest need for treatment. Persons of lower income and education were at higher risk of having some form of mucosal lesions. The public will be unlikely to make use of dental services to prevent or treat lesions or to service a prosthesis unless they are specifically educated to do so.

Adult↗
PubMed1985

Instrumentation for solving abutment parallelism problems in fixed prosthodontics.

Casts from a number of preparations by dentists with a variety of fixed prosthodontic experience levels were surveyed, and the preparations were commonly found to contain undercuts, overtapered surfaces, and lack of a parallel path of insertion. A new instrumentation for preparing abutment teeth was examined, which eliminated the common inaccuracies caused by traditional techniques of using freely held handpieces and visually assessing the finished preparations. Three clinical preparation procedures were discussed. Each patient posed particularly demanding problems that required precise tooth preparation. Each completed prosthesis was readily inserted in the mouth due to the unobstructed uniform path of insertion. Keyways were not required in any of the prostheses.

Dental Abutments↗
PubMed1985

Prosthodontic considerations in the management of surgically compromised cleft palate patients.

Prosthodontic habilitation with speech aid prostheses for surgically compromised cleft palate patients has been discussed. It can be concluded that surgical redivision of the soft palate with removal of the levator veli palatini muscles as an aid to construction of a pharyngeal obturator is contraindicated. Surgical redivision with removal of the levator muscles prevents subsequent surgical procedures and commits the patient to a prosthesis for life. The management of nonfunctional pharyngeal flaps, large soft palate perforations, and patients with palatopharyngeal insufficiency and/or incompetency secondary to surgical repairs was also discussed. If the prosthodontist is routinely consulted in the initial treatment planning, alternatives to surgical management might be considered for patients with high potential for postsurgical deficiencies.

Cleft Palate↗
PubMed1985

An esthetic control system for fixed and removable prosthodontics.

A set of devices and techniques has been developed to convey to the dental laboratory technician the information that is essential for the correct placement and alignment of anterior crowns, pontics, or denture teeth. The system brings a measure of accuracy and control to the esthetic aspect of prosthodontics that is taken for granted in other procedures.

Dental Articulators↗
PubMed1985

Prosthodontic rehabilitation of midfacial defects.

A definition and classification of midfacial defects has been presented with a systematic approach to the prosthetic restoration of these defects. Patient factors, prognostic and diagnostic considerations, clinical procedures, fabrication, materials, and retention have been discussed. Patients with complex orofacial defects can be provided with prosthodontic treatment that results in an acceptable appearance and function consistent with the deficits encountered (Figs. 14 and 15).

Denture Design↗
PubMed1985

Speech considerations in prosthodontic rehabilitation of the glossectomy patient.

A knowledge of normal articulation is needed before the prosthodontist can assess the compensatory articulation used by glossectomy patients. The amount and portion of tongue resected is directly correlated with speech intelligibility. The loss of the tip of the tongue is more critical to intelligibility than a hemiglossectomy. Partial glossectomy speakers can often use the residual tongue stump to perform adaptive movements that approximate normal movements and should be treated as an articulation problem. The compensatory articulation used by the total glossectomy patient was reviewed. The prosthodontic management of patients with partial tongue resection often includes lowering the palatal vault, while the management of the total glossectomy patient usually requires a mandibular tongue prosthesis. These prostheses can be refined with the use of multiview videofluoroscopy, videotaping, and spectrographic analysis.

Dentures↗
PubMed1985

Metal minibases in removable prosthodontics.

A description of the designs and indications for minibases in removable prosthodontics has been presented. Minibases can solve complicated space problems when surgery is contraindicated by providing a strong, thin, abrasive-resistant denture base. The result of their correct use is a prosthesis that fits well, is extended correctly, functions without opposing interferences at the correct vertical dimension of occlusion, and resists the functional stresses placed on it during service.

Dental Alloys↗
PubMed1986

A fixed prosthodontic technique for mandibular osseointegrated titanium implants.

A detailed technique has been presented for the fabrication of a fixed prosthesis supported by osseointegrated titanium implants. The fixed prosthodontic technique is based on the original Swedish procedure. Several new dental products have been added, and some refinements in technique have been made in an effort to consistently produce a fixed prosthesis that fits, functions, and satisfies today's esthetically conscious patient. Branemark's tissue-integrated prosthesis (TIP, Bofors Nobelpharma, Inc.) is the only dental implant system with two decades of high-quality longitudinal clinical experience. A fixed prosthesis supported by osseointegrated implants offers a treatment modality that is predictably successful (Fig. 21).

Dental Articulators↗
PubMed1986

A new visible light-cured resin system applied to removable prosthodontics.

Preliminary studies of VLC resins have produced promising results; however, additional research is necessary to completely define qualities of this material. Biologic testing of VLC (Triad) resins indicated that they are nontoxic and biocompatible. They have a wide range of uses in all subdisciplines of prosthodontics. Advantages such as accuracy of fit, superior strength, complete polymerization without residual compounds, ease of fabrication and manipulation, patient acceptance, ability to bond with other denture base resins, and low bacterial adherence make this material an important addition to the choices available to dentists. As with many new materials, there are initial problems or hurdles that must be overcome before there is widespread use. Initial formulations of material had insufficient flexural strength and tended to fracture when flexed over uncut sites on a stone cast. This problem has been reduced by Dentsply International, Inc. with the introduction of the new improved formulation. The original VLC bonding agent did not provide sufficient bond strength with acrylic resin denture base materials, but this also has been improved with development of a new VLC bonding agent. The problem of microporosity and small voids produced when adapting VLC resin sheets against a stone cast may be overcome with pressure or vacuum adaptation techniques. A promising application of VLC resin material is in direct intraoral procedures such as relining of dentures. Physical and chemical properties are superior to autopolymerizing methacrylates. Preliminary studies have shown successful patient acceptance to this clinical procedure. It is of particular advantage to the patient not to be without dentures for the period of at least 1 day necessary for a laboratory-processed relining. Immediate light-curing is time-saving and convenient compared to indirect (heat-cured) relining. Until recently, most direct intraoral applications of autopolymerizing acrylic resin reliner material were considered temporary or expedient to a permanent procedure. The patient and dentist may now have another treatment choice. The release of residual methyl methacrylate, among other shortcomings of AP materials, is not a concern when using the VLC reliner material. Some patients may notice a nonobjectionable taste to the uncured material; however, they can be reassured that the taste will be only temporary until the material is completely polymerized in the curing unit. The flow of the material can be regulated by selection of appropriate viscosity, warming and cooling measures, and partial intraoral polymerization with hand-held curing lights.(ABSTRACT TRUNCATED AT 400 WORDS)

Acrylic Resins↗
PubMed1987

Alternative prosthodontic technique for tissue-integrated prostheses.

This modified technique for fabrication of tissue-integrated prostheses saves valuable clinical time for the dentist and treatment time for the patient. The technique differs in that a modified denture is placed in the mouth the day of the second operation, impression copings are eliminated at the final impression, the framework is fabricated before jaw relation records, a high-content palladium alloy is used for the framework, the master cast is flasked similar to a complete denture technique, and the access openings are closed with a light-cured resin. Prerequisites for a tissue-integrated prosthesis are not violated and comparable results are achieved. The technique can also be used in maxillary arches and, with slight modifications, for partially edentulous patients. This technique has been used 3 years for 35 jaws in 37 patients, with 184 fixtures. Four fixtures have failed, producing a 98% success rate. All prostheses have remained continuously stable. Economy of clinical time and laboratory procedures in the prosthodontic phase increase the acceptance of osseointegration in clinical dentistry. The cooperative efforts of all disciplines will provide a greater acceptance of this treatment modality, which will enhance the patients' quality of life.

Dental Alloys↗
PubMed1990

Prosthodontic considerations for the transmandibular implant.

The transmandibular implant has been designed to provide the patient with a severely atrophic mandible an implant that will bear the masticatory load. Thirteen edentulous patients treated with maxillary complete dentures and mandibular overdentures retained by the transmandibular implant were examined biannually for 2 years. Prosthodontic complications included the development of parafunctional habits, "combination syndrome," and epulis in association with the mandibular denture. Surgery was necessary to control chronic mucosal irritation related to muscle pull in one patient. Among the soft tissue parameters, plaque index, gingival index, and sulcus depth demonstrated statistically significant correlations (Spearman). All patients reported an absence of discomfort and those with previous functional complaints reported the ability to masticate all foods. Patient response to overdenture reconstruction with the transmandibular implant seems to be similar to that observed with the combination case. Oral hygiene appears to be directly related to the soft tissue response.

Consumer Behavior↗
PubMed1991

Cephalometrically predicted occlusal plane: implications in removable prosthodontics.

Although the determination of the occlusal plane is crucial in clinical removable prosthodontics, none of the existing methods gives sufficient guidelines for that purpose. The aim of this investigation was to check the hypothesis that the angulation of the occlusal plane is generally related to the skeletal base of the maxillae. Statistical analysis revealed (1) no strong linear correlation (p greater than 0.05) between the following variables: (a) the length of Cook's plane to Cook's occlusal plane angle, (b) the length of the maxillary plane to the maxillary occlusal plane angle, and (c) the Po Na ANS angle to the occlusal Frankfort plane angle; (2) no parallelism between the occlusal and HIP plane with a mean angle of 4.57 degrees, SD 2.57 degrees, and range of 0 to 9.5 degrees; and (3) no correlation between the predicted and clinically determined occlusal planes (r0.267, t1.797, p greater than 0.05).

Adult↗
PubMed1991

The effect of film thickness on the tensile bond strength of a prosthodontic adhesive.

This study investigated the effect of cement film thickness on the tensile bond strength of a prosthodontic adhesive. Rexillium III alloy cylinders were bonded end-to-end with Panavia Opaque adhesive cement and film thicknesses of 20, 50, 80, 110, 140, and 200 microns were evaluated. The specimens were thermocycled for 24 hours (1080 cycles) between 5 degrees and 60 degrees C, stored for 30 days at 37 degrees C, and the mean bonds for tensile strength, including the mode of failures, were recorded. Statistical analysis revealed significant differences, but the strongest bond strengths were recorded for the 80 microns cement film thickness.

Adhesives↗
PubMed1992

Removable prosthodontic laboratory survey.

This article presents a brief review of the literature concerning the curriculum deemphasis for removable prosthodontics, especially on the subject of complete dentures. The authors surveyed commercial dental laboratories specializing in removable dental prosthetics in three major Texas cities to determine whether dentists were submitting adequate records and information with their complete denture work authorizations. Results indicate that dentists are requesting services from their laboratories without providing adequate records.

Dental Occlusion↗
PubMed1992

Generic terminology for endosseous implant prosthodontics.

Implant dentistry has become an integral treatment modality in the restoration of the complete and partially edentulous patient. Most practitioners have been educated by manufacturer-sponsored courses oriented to the use of a specific implant system. The ever-increasing number of implant systems has made the names of many implant components product-unique and confusing. Fortunately, a prosthetic continuity exists between most implant systems. A generic terminology for endosseous root-form prosthodontics is presented that allows effective communication between members of the profession.

Dental Abutments↗