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[Methods of comparison of the precision of the surface shape on the impression, the model, and the completed total prosthesis].
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[Method of repairing the damaged attachment in a revovable prosthesis].
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[The use of non-parallel transcoronar screws for a fixed prosthesis].
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[The partial prosthesis].
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[Theory and practice of the bridge prosthesis].
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[Contribution to the study of temporary surgical fixation of the total prosthesis].
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[Retention of a plastic incisor crown by means of acid etching or by parapulpal screw-retained pins].
According to our in vitro experiments, a combination of caustic acid and the brush technique with peripulpar screw dowels appears to be the method to be recommended for the optimal plastic build up of anterior teeth.
Implant-stabilized complete mandibular denture for a patient with cerebral palsy.
Sufferers of cerebral palsy often have difficulty in chewing, speaking and swallowing because of the involuntary muscle spasms caused by their condition. This problem also makes it very difficult or even impossible for them to wear complete mandibular dentures. This article describes a cerebral palsy sufferer who was successfully fitted with a complete lower denture stabilized by osseointegrated implants. It may be possible to apply the techniques used for people with similar problems.
[Posterior palatal sealing in Hungarian dental practice].
The purpose of the survey was to receive data about the methods, materials and instruments used in the development of the border seal at pharyngeal region. The problem concerned how the theoretical principles are realised in the everyday practice. A questionnaire consisting of 10 questions was given out to 35 dental laboratories in 31 towns of the country. 33 completed forms were returned. On the basis of the survey's results the authors conclude that in everyday practice practically nothing realizes from the recommendations of dental literature. The shape of the upper complete dentures' palatal seal is made by dental technicians, regretfully without the cooperation of dentists and what is more disappointing without their instructions. Dental technicians are left to their own resources to form the pharyngeal seal by mechanical engraving of the casts.
Implant-retained overdentures.
While fixed implant-supported restorations were the most popular method of restoring edentulous mandibles during the development of osseointegrated implants, it soon became evident that removable overlay prostheses also were an excellent treatment choice. Lower cost and improved hygiene access were perhaps the main advantages of the removable overdenture in the mandible, although in some patients, the overdenture also provided necessary improved esthetics and more adequate lip support, compared to the fixed restoration.
Long term clinical evaluation of conical crown retained dentures.
The conical crown was introduced by K.H. Körber more than twenty years ago, as a development of the well known telescopic crown. In combination with a removable denture, the conical crown has become widely used in Germany and Sweden, since the system enable modifications with maintained function if abutments are lost. All 78 patients treated with conical crown retained dentures, at the School of Dentistry, Dept. Prosthetic Dentistry, Lund University, 1983-1988, were included in a 40 month follow up study using the CDA quality evaluation system. More than 80% of the removable dentures and abutments were in function at the time of examination. Forty-four percent of the conical crown retained dentures were considered having acceptable quality while 56% were not acceptable, mainly due to caries at the abutments margins.
Laboratory fabrication of an implant supported and retained milled bar overdenture.
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Multiple cantilevers: an alternative to dental implants.
A solution to the problem of missing posterior teeth is presented. The prerequisite for solving this problem is that the remaining teeth must be positioned in one form or another in a triangle, as one can see in Figs. 2, 3 and 4. The tripod effect, in connection with the controlling effect of the mechano-receptors in the periodontal ligaments of the remaining abutment teeth, permit us to construct a functional fixed prosthesis. The feather-edged or knife-edged preparation technique creates long axial walls. Together with the parallel prepared abutment teeth, this must be viewed as the main-retentive feature for fixed prostheses with multiple cantilevers. In extreme situations, where one is uncertain about the outcome of a case, provisional laboratory fabricated restorations are excellent for evaluating the stability of the cross-arch splinted teeth. The whole bridge occasionally shows some mobility. As long as the mobility shows no increase over a period of time, and does not interfere with the patient's chewing ability, a permanent bridge with multiple cantilevers can be inserted. I usually include no more than three cantilevered pontics on each side of the arch in a multiple cantilevered bridge. A second molar is not replaced by a third cantilevered pontic. Its position in the arch may cause an overly strong lever action on the fixed prosthesis.
Use of the frontal process of the maxillary bone for implant placement to retain a nasal prosthesis: a clinical report.
Implant placement to provide support and retention for nasal prostheses has been described in the literature. The anatomic sites that have been utilized for implant placement are the nasal bones, the premaxillary area through the nasal fossae, and the anterior wall of the frontal sinus. In the patient described, after a presurgical computerized tomography scan to determine adequacy of bone volume, 1 conventional threaded hydroxyapatite-coated root-form implant, created for intraoral use, was placed in the frontal process of the maxillary bone and 2 additional conventional implants were placed in the premaxillary area through the nasal fossa. Six months after implant placement, second-stage surgery was completed. A single bar connecting the 3 implants was fabricated. The removable nasal prosthesis was retained on the bar with 2 clips. An examination 1 year postsurgery revealed no clinical signs of pathosis. Long-term clinical follow-up of this case should continue and a sufficient number of additional cases should be investigated before use of the frontal process of the maxillary bone for implant retention can be recommended on a routine basis.
A technique for fabrication of a cheek recontouring prosthesis.
A technique has been described for fabrication of a removable prosthesis that restores proper cheek contour. This prosthesis is a modified removable partial denture with a retentive surface to hold an acrylic resin bolus to recontour the cheek from within. The advantages of such a prosthesis for the patient with facial nerve paralysis include restoration of fullness and proper contour to the cheek (Figs. 7 and 8), prevention of trauma to the buccal mucosa during mastication, and stretching of the cheek, which indirectly improves oral hygiene in the buccal sulcus. The disadvantages of this technique include limited improvement in esthetic and functional contour of the cheek, and food accumulation beneath the acrylic resin bolus, which requires more meticulous hygiene.
[The Nissenkorn endourethral prosthesis: our experience].
The Authors report their experience about 40 patients who presented urinary retention by cervico-prostatic obstruction with anesthetic counterindications or limited life expectancy, cured with the urethral prosthesis of Nissenkorn (IUC). Our data permit to say that in selected patients IUC may represent an effective treatment with minimal invasiveness, low cost and few side effects.
Sectional prosthesis with hollow obturator portion made of thin silicone layer over resin frame.
Magnetically retained sectional obturator prostheses, consisting of a hollow obturator portion made of thin silicone layer over a resin frame and a denture portion, were fabricated to alleviate some of the limitations of silicone materials, and applied to two edentulous patients with maxillectomy defects. The silicone obturator allowed profound engagement of undercuts within the defect, resulting in adequate retention, support and stability of the prostheses for over 3 years. The patients have achieved improvement in speech and mastication without complications, by use of the obturator prostheses.