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At least 865 records · Page 48Linked to original sources
PubMed1991

The effects of a maxillary speech-aid prosthesis for the combined tongue and mandibular resection patient.

The purpose of this investigation was to develop a protocol for the fabrication of a prosthesis that would improve speech in individuals who have undergone complete removal of the tongue and mandible. A 60-year-old man was suffering from severe xerostomia and was unable to produce intelligible speech. Speech analysis without the prosthesis revealed a profound articulatory disorder. With the prosthesis, xerostomia was eliminated and the subject had fewer articulatory errors of severity. Improvement in speech intelligibility was significant at p less than 0.001.

Articulation Disorders↗
PubMedDate not supplied

Tilting of posterior mandibular and maxillary implants for improved prosthesis support.

Rehabilitation of atrophied edentulous arches with endosseous implants in the posterior regions is often associated with anatomic problems such as jaw shape and location of the mental loop, mandibular canal, and maxillary sinuses. The purpose of this investigation was to modify the method for implant placement in the posterior part of the jaws to extend fixed implant-connected prostheses further distally, and to reduce the length of cantilevers in complete-arch prostheses without transpositioning the mandibular nerve or performing bone grafting in the maxilla. Forty-seven consecutive patients were treated with implants (25 patients/36 mandibular implants, 22 patients/30 maxillary implants) placed in tilted positions. They were followed a mean of 40 months (mandibles) and 53 months (maxillae). In the mandible, implants close to the mental foramina were tilted posteriorly approximately 25 to 35 degrees. In the maxilla, the posterior implants were placed close to and parallel with the sinus walls and were titled anteriorly/posteriorly approximately 30 to 35 degrees. Patients gained a mean distance of 6.5 mm of prosthesis support in the mandible and 9.3 mm in the maxilla, as a result of implant tilting. There were no implant failures in mandibles. The cumulative success rates in the maxilla at 5 years were 98% for tilted implants and 93% for non-tilted implants. Paresthesias of the mental nerve were observed on 4 sides during the first 2 to 3 weeks after implant placement. Analysis of the load distribution in one mandibular case showed no significant difference between tilted and the non-tilted implants, and the improved prosthesis support was confirmed. Satisfactory medium-term results concerning osseointegration and significant extension of prosthesis support show that the method can be recommended. This technique may allow for longer implants to be placed with improved bone anchorage.

Adult↗
PubMed1987

Secondary reconstruction of the mandible with an aluminum oxide prosthesis.

A case is presented where secondary mandibular reconstruction with an aluminum oxide ceramic prosthesis was performed for a patient who had had an earlier hemimandibulectomy and primary bone graft for management of an ameloblastoma. Various factors that were considered in the construction of the prosthesis and problems encountered during operation are discussed. Although the prosthesis was found to be quite useful for the restoration of facial contour, the results of a long-term follow-up are needed to obtain a final evaluation of the reconstruction.

Adult↗
PubMed1994

[Mandibular reconstruction using a metallo-acrylic implant prosthesis in oncology. Apropos of 40 cases].

The authors report on 40 cases using acrylic-metal prosthesis after ablative cancer surgery and compare them with the literature. The long-term complications (prosthesis extrusion or infection) are important, but the short-term follow-up (3 months) is more than 80% of success, any material used. The prosthesis keep a physiological position to the mandible, against scar sequelae. The use of soft tissue closure without post-operative radiotherapy increase the success of a simple-used and low-priced device of mandibular reconstruction.

Acrylic Resins↗
PubMed2000

Within-subject comparison of maxillary long-bar implant-retained prostheses with and without palatal coverage: patient-based outcomes.

Although maxillary implant overdentures are used in oral rehabilitation, different designs have not been compared previously in clinical trials. This crossover trial was designed to measure differences in patient satisfaction with maxillary long-bar implant overdentures with and without palatal coverage opposed by a fixed mandibular implant-supported prosthesis. Data were also gathered on new conventional dentures and on maxillary conventional dentures opposed by mandibular fixed prostheses. Sixteen participants were selected from a population wearing conventional dentures. Fifteen received new upper and lower dentures (1 drop-out). Four implants were placed in the maxilla and mandible (2 drop-outs). A mandibular fixed prosthesis was inserted in 13 participants, who were then divided into 2 groups. One group (n = 7) received long-bar overdentures with palate, then long-bar overdentures without palate. The other group (n = 6) received the same treatments in the reverse order. Mastication tests and psychometric evaluations using Visual Analog Scales and Categorical Scales were performed throughout the study. General satisfaction was very high with both maxillary implant-supported prostheses, as were ratings of almost all psychosocial and functional variables. There were no significant differences between treatments, suggesting that patients are equally satisfied with long-bar overdentures with and without palate when these are opposed by mandibular fixed prostheses. However, the ratings given to the maxillary implant prostheses were not significantly higher than for new conventional maxillary prostheses. This suggests that maxillary implant prostheses should not be considered as a general treatment of choice in patients with good bony support for maxillary conventional prostheses.

Adult↗
PubMed1979

[Surgical correction of mandibular cyst and tumour defects (author's transl)].

The various surgical techniques for the repair of mandibular defects following ablative surgery are discussed. The methods used in the treatment of large mandibular cysts are described and a modification of the osteoplastic technique is presented. The importance of reconstruction and functional rehabilitation with so caused mandibular defects and temporo-mandibular joint substitutions are stressed.

Bone Plates↗
PubMed1978

Functional rehabilitation of ankylosed temporomandibular joints.

Successful chrome-cobalt prostheses have been used to replace the condyle and glenoid fossa in six young Macaca irus monkeys. In one group of two animals the left temporomandibular joint was replaced; in the second group the right joint and in the third group both temporomandibular joints were replaced. Neither masticatory function nor ability to open or close the mouth was affected, and all the animals remained in excellent health, living in the colony for 9 to 10 months. A similar surgical procedure was carried out for treatment of three human patients with ankylosed temporomandibular joints.

Adult↗
PubMed1998

Alloplastic and microvascular restoration of the mandible: a comparison study.

The evolution of mandibular reconstruction following composite resection is advanced by improved alloplastic prosthesis and reliable microvascular free tissue transfers. A 42-case, 6-year experience is presented using both methods at the University of California, San Francisco. The advantages and complications of both are discussed. The authors conclude that the success rate for lateral defect restoration is equivalent with either technique, and that the anterior defects are more reliably reconstructed with free tissue transfer. The advantage of microvascular flaps in the anterior defect must be gauged against the physical status of the patient, disease extent, and likelihood of dental rehabilitation by interosseous fixation.

Aged↗
PubMed1987

Evaluation of autologous cancellous bone grafting of mandibular discontinuity defects in dogs using a Dacron-urethane prosthesis.

Reconstruction of 2 cm discontinuity defects using autologous cancellous bone chips and a Dacron-urethane prosthesis was evaluated in four canine mandibles. Histologic studies were performed on specimens taken six and 12 months after bone grafting. All four grafts were completely incorporated, producing a reconstruction that conformed precisely to the desired shape. Remodeling resulted in a trabecular pattern similar to that of the normal mandible. The prosthesis was well tolerated and did not elicit an inflammatory response.

Animals↗
PubMed1992

The mandibular swing-lock complete denture for patients with microstomia.

Regardless of cause, the treatment of an edentulous patient with microstomia is difficult and often ingenious. Prosthodontic treatment modalities previously described are reviewed. A new type of prosthesis, the collapsible mandibular swing-lock complete denture, is introduced. The prosthesis incorporates a cast cobalt-chromium framework with a lingual hinge and a conventional labial swing-lock. This combination allows the prosthesis to be collapsible while maintaining structural durability. Advantages include ease of insertion and removal while providing maximum coverage for support, retention, and stability. A stepwise technique for the clinical and laboratory phases is described.

Dental Impression Technique↗
PubMed2001

Evaluation of speech in patients rehabilitated with various oral implant-supported prostheses.

In the present study, speech function was assessed in edentulous patients wearing fixed or removable dental prostheses supported or not by oral implants. A total of 138 patients participated in the present research. The experimental group (n=113) was divided in 4 subgroups. Subgroup FD/FFPi comprised 22 patients with a maxillary full denture (=FD) and a mandibular fixed full prosthesis on implants (=FFPi). Subgroup FFPi/ND consisted of 27 patients with a maxillary fixed full prosthesis on implants and a natural dentition (=ND) in the mandible. Subgroup FD/ODi included 49 patients wearing a maxillary full denture and a mandibular overdenture on 2 implants (=ODi). Subgroup FFPi/FFPi comprised 15 patients having a fixed full prosthesis on implants in both jaws. The outcome of the logopedic screening of the experimental group was compared with that of a control group of subjects having a natural dentition (ND/ND; n=25). A standard clinical procedure for evaluation of speech was carried out by a speech pathologist. Besides, specific oral and prosthetic parameters were scored in all patients. It was established that one or more pronunciation difficulties occurred in 84% of the patients of the experimental group. This was significantly more than in the control group, where half the number of subjects had some speech deficiencies. No clear influence of specific oral and prosthetic parameters could be identified. From the present results, it could be concluded that in patients rehabilitated with oral implant-supported prostheses speech disorder is more frequently observed than in subjects with a natural dentition.

Adult↗