Halothane and rouge: an alternative to chloroform and rouge as a disclosing medium.
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Chloroform↗
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Results for “Prosthesis Fitting”
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Attachments used for implant-supported facial prostheses: a survey of United States, Canadian, and Swedish centers.
A survey was conducted of one Swedish, three Canadian, and 24 United States centers that provide implant-supported facial prosthetic treatment. All centers responded to the survey. A total of 357 patients began treatment. Of those, 338 completed treatment: 165 in Sweden, 131 in the United States, and 42 in Canada. The incidence of facial sites treated with implant-supported prostheses indicated that the auricular (72%) region was the most common site, followed by the orbital (20%), nasal (6%), and combination (2%). Clips were the predominant mechanism used to retain auricular prostheses. Orbital prostheses were fabricated with a wider variety and combination of attachments. Nasal and combination prostheses were too few to elicit any specific trends of attachment use. A variety of manufacturers' attachments were used for clip, magnet, and miscellaneous attachments to retain implant-supported facial prostheses. Results of this survey indicate a need for further investigation regarding the most efficacious attachment method to serve patients treated with implant-supported facial prostheses.
Canada↗
Positioning jig for implant abutments: procedures and clinical applications.
A custom-milled abutment may be positioned in six different orientations on a hexed implant. When more than one implant abutment is to be placed, the number of possible orientations increases and makes this step time consuming. It is imperative that the abutment be held in a fixed position while the abutment screw is tightened. Occasionally the master working cast is not accurate and a procedure to correct the cast without making a new impression is required. This article describes a procedure for making and using a positioning jig to alleviate these problems.
Dental Abutments↗
Intraoral recontouring aid.
This article describes a procedure and a device to expedite the intraoral recontouring of teeth to receive removable partial dentures. This procedure is particularly useful when heights of contour are lowered on posterior teeth and the path of insertion is perpendicular to the plane of occlusion.
Dental Occlusion, Balanced↗
Simplified clinical remount for complete dentures.
Occlusal errors in new dentures can result from clinical errors and processing changes. Corrections must be made the dentures in the patient's mouth or by making new jaw relation records and correcting the occlusion on an articulator. The latter method is far more accurate because the dentures are seated on rigid bases, errors are more easily seen, and soft tissues and saliva do not interfere with selective grinding. This article describes a simple and quick clinical remount procedure using putty material.
Centric Relation↗
An impression and cast construction technique for implant-retained auricular prostheses.
Implant-retained auricular prostheses present a challenge with regard to the esthetic placement of the margins of the prosthesis. A technique for the impression and master cast fabrication to produce an implant-retained auricular prosthesis is described. This technique allows control of the esthetic margin, fabrication of a durable master cast with planned blockout, and inclusion of a replica of the retentive bar, which allows processing duplicate prostheses without returning the retentive bar to the mold.
Ear, External↗
Technique for magnetic placement and orientation of a facial prosthesis.
A simple technique is described for placing and orienting a facial prosthesis with a magnetic holder. This technique involves samarium-cobalt magnets embedded in a silicone prosthesis and counter magnets placed in a holding device.
Cobalt↗
Marginal discrepancy of ceramic crowns with redesigned implant components.
A previous study indicated a mean marginal discrepancy of 169 microns (SD = 23) for cemented CeraOne ceramic crowns. Since then, the components have been redesigned by the manufacturer. This study assessed the marginal discrepancy of the new components by use of a video camera and stereomicroscope connected to a computer. Fifteen samples each of (a) ceramic caps (control), (b) ceramic caps fired once in a porcelain oven (c) ceramic crowns, and (d) cemented (zinc phosphate) ceramic crowns were examined. The results indicated that the mean marginal discrepancies were: caps 20.4 microns (SD = 10.8), fired caps 18.3 microns (SD = 9.3), crowns 28.1 microns (SD = 9.7), and cemented crowns 65.9 microns (SD = 15.8). Statistical analysis (ANOVA) revealed significant differences between these mean marginal discrepancies (p < 0.0001). A Scheffe F-test revealed no statistically significant difference between the means for caps, fired caps, and crowns, whereas cemented crowns had significantly greater mean marginal discrepancies compared with all uncemented retainers (p < 0.0001). The mean marginal discrepancy of the redesigned CeraOne ceramic system (cemented crowns) was reduced by more than 100 microns compared with the original design.
Crowns↗
Procedure to predictably seat multiple, hexed abutments onto endosseous implants: a clinical report.
The use of implants to restore the dentition of partially edentulous patients has increased over the past several years. Optimal esthetic results depend on satisfactory implant placement. Occasionally, implants are placed in less than optimal positions, which may require modification in the prosthesis design and increase the technical difficulty. In these instances, preangled or customized abutments can be used. If more than one of these abutments has to be used, accurate orientation of the hexed components to the implants and each other may be a problem. This clinical report illustrated a simple, inexpensive procedure to transfer the orientation of two or more hexed abutments from a master cast to the mouth. This procedure reduced the time needed to orient the hexed abutments correctly in laboratory and clinical situations. It may also reduce the chances of the patient aspirating or swallowing abutments or screws.
Adult↗
Survey lines revisited: finding nonundercut surfaces for retainers that approach from the occlusal surface.
This study investigated survey lines on abutments in the partially edentulous mouth. Various methods that were used to determine the path of insertion had little impact on the position of survey lines except on tooth surfaces with minimal undercuts. Typical survey lines are described and according to the survey lines, few tooth surfaces could accommodate the rigid portion of an occlusally approaching retainer and permit it to be positioned on a nonundercut tooth surface. Although some degree of enameloplasty to improve the situation on some tooth surfaces is possible, the degree to which this can be done is limited by the thickness of the enamel and considerations of tooth conservation.
Dental Abutments↗
Anterior margin adaptation for implant-retained auricular prostheses.
Adaptation of the anterior margin of implant-retained auricular prostheses may be compromised during mandibular movement. Loss of contact between prostheses and underlying skin in an esthetic area is of great concern. This article describes an impression procedure that addresses the problem of anterior margin adaptation.
Acrylic Resins↗
Multiple prosthodontic uses for permanent crown remover forceps.
Practitioners will find multiple uses for Perm Gripper forceps. These crown remover forceps are likely to become an indispensable adjunct in the busy prosthodontic practice.
Crowns↗
Construction faults, age, gender, and relative medical health: factors associated with complaints in complete denture patients.
STATEMENT OF PROBLEM: Many practitioners will experience a situation, whereby a patient with newly fabricated complete dentures continues to experience difficulty in adapting to them. This can lead to a protracted period of discouraging "adjustment appointments" that may not result in the eventual resolution of the problem. Therefore it is often concluded that there is some patient factor, either age, gender, medical, or psychologic status that is hindering the success of treatment. PURPOSE: This study examined a group of 100 patients who experienced ongoing difficulties with their new complete dentures, to determine possible underlying causes. MATERIAL AND METHODS: A retrospective study was conducted with information derived from patient records. All patients were treated by the same prosthodontist after having been referred specifically for their denture problems. Information regarding patient age, gender, medical and psychological histories, and information pertaining to the dentures at the time of presentation was derived from patient records. RESULTS: Statistical analysis comparing age, gender, and medical and psychologic status with the number or type of patient complaint failed to show any significant relationships. Significant relationships were observed when denture design faults or the condition of a patient's mucosa were compared with patient complaints. CONCLUSIONS: This study suggests that in most instances, complete denture patients present with complaints only when there is a real design fault or a tissue problem.
Adaptation, Physiological↗
Radiographic verification of implant abutment seating.
STATEMENT OF PROBLEM: It is possible to incorrectly seat an abutment on an external hex implant. PURPOSE: This study investigated the theoretical and practical limits of radiographic verification of the complete seating of implant abutments on external hex implants. MATERIAL AND METHODS: A positioning device that could accurately place the film and/or tube head in any vertical relation desired relative to the implant and abutment was fabricated. For all records, a standard abutment was secured to the implant in both a fully seated position (closed) and with the abutment turned approximately 30 degrees and seated atop the implant external hex (open). Digital radiographs were made with the tube head fixed perpendicular to the implant and the film angled at 0, 5, 10, 15, 20, 25, 30, 35, 40, and 45 degrees. The film was then positioned parallel to the implant and the tube head was angled at 0, 5, 10, 15, 20, 25, 30, 35, 40, and 45 degrees. An image of each position was shown to 36 dentists and they were asked if the image was diagnostic for determining the status of the implant/abutment interface. RESULTS: The data were analyzed with a computer statistics program. The group with the tube head changed was analyzed with the Cochran's Q test and revealed a statistically significant (p < 0.0001) change in the diagnostic value of radiographs beginning at 20 degrees. The group with the film angle changed was analyzed with a Pearson chi-square and showed no statistical difference (p = 0.394) for the diagnostic value of any of the film angles. CONCLUSION: Maintaining the tube head to less than 20 degrees from perpendicular to the long axis of the implant resulted in a diagnostic radiograph, regardless of the angle of the film.
Chi-Square Distribution↗
Maintenance of gingival contour during prosthodontic procedures: a clinical report.
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Aged↗
Silicone prosthesis prevents vertigo due to the defect at the mastoid process after mastoidectomy: a clinical report.
This clinical report describes a 64-year-old woman with a bony defect in the mastoid process after mastoidectomy and who experienced vertigo on cold and windy days during winter. The patient noticed that packing a piece of paper or cotton into the defect prevented the vertigo. The patient refused surgical repair, so a silicone prosthesis was fabricated to fill the defect completely. Electronystagmography confirmed the effectiveness of the prosthesis to prevent nystagmus. Although surgical repair is ideal, prosthesis repair of the defect may prove to be effective in some patients.
Electronystagmography↗
Simple method of unscrewing tightened abutment and transfer coping in Calcitek Spline implants.
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Crowns↗
Impact of small prosthetic valve size on operative mortality in elderly patients after aortic valve replacement for aortic stenosis: does gender matter?
OBJECTIVE: Ideal management of the elderly patient with a small aortic root remains controversial. This retrospective analysis was performed to determine whether small prosthetic valve size is related to outcome in patients 70 years of age or older undergoing aortic valve replacement for aortic stenosis. METHODS: Between December 1991 and July 1998, 366 patients 70 years of age or older (median age 77 years, range 73-81 years, 49% male) underwent isolated aortic valve replacement or aortic valve replacement with coronary bypass grafting with standard Carpentier-Edwards bovine pericardial valves (Baxter Healthcare Corp, Edwards Division, Santa Ana, Calif) (n = 277; 76%) or St Jude Medical mechanical valves (St Jude Medical, Inc, St Paul, Minn) (n = 89; 24%). Propensity scoring and multivariable regression models were used to evaluate the risks associated with implantation of 19-mm valves. RESULTS: Operative mortality was 16.7% (17/102) in patients who received 19-mm valves and 3% (8/264) among those receiving >/=21-mm valves (P </=.0005). The univariable odds ratio for operative death for 19-mm versus >/=21-mm valves was 6.4 (95% CI 2.7, 15.4; P </=.0005). In the final multivariable model, receipt of a 19-mm valve alone was not a statistically significant predictor of operative death (odds ratio 2. 1; 95% CI 0.7, 6.4; P =.21). However, the combination of male sex and 19-mm valve resulted in a significant risk of operative death (4/9 patients; odds ratio 17.5; 95% CI 2.2, 139; P =.007). Use of a 19-mm valve was not related to late death in either the univariable (hazard ratio 1.0; 95% CI 0.5, 2.0; P =.95) or the multivariable analysis (hazard ratio 0.7; 95% CI 0.3, 1.8; P =.51). CONCLUSIONS: Implantation of a standard 19-mm aortic valve in elderly men with aortic stenosis may be associated with an increased risk of operative mortality. A higher performance valve and/or a root enlargement procedure should be considered in men with a measured 19-mm anulus.
Aged↗