Biomedical subjects
Publications and source records attributed to T D Taylor.
A surgical technique for placement of a collagen-hydroxylapatite implant to augment severely atrophic mandibles is described.
Nystatin has been formulated in the form of a flavored pastille (troche) as an alternative to the oral suspension. This parallel, double-blind, randomized, placebo-controlled study evaluated the acceptance and effectiveness of the nystatin pastille at two different dosages. Twenty-four subjects were selected on the basis of clinical signs of denture stomatitis and culture isolation of Candida spp. Each subject was randomly assigned to one of three treatment groups (A, 200,000 units; B, 400,000 units; and C, placebo). At entry, 7 days, 14 days, and at 10 days after cessation of treatment, the clinical condition was evaluated and Gram stain smears and imprint cultures were made and analyzed. The flavored pastille was well accepted by the subjects and both dosages were shown to be effective in significantly reducing or eliminating the Candida organism during active therapy. Data from the 10-day follow-up, however, demonstrated reinfection with the organism. Thus to resolve the condition, effective therapy must include treatment of the etiologic factors of denture stomatitis along with antimicrobial therapy.
A patient report is presented illustrating bone growth of the posterior mandible associated with a fixed implant reconstruction of the Brånemark type. In this instance, the mandible had grown vertically approximately 3 mm and was causing discomfort beneath the cantilever sections of the prosthesis because of gingival impingement between the restoration and the bony mandible. The literature relative to osteogenesis associated with osseointegrated implants is reviewed.
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In a multicenter study, 77 edentulous patients had mandibular augmentation with implants of purified fibrillar collagen combined with dense hydroxylapatite (Alveoform Biograft); 22 of these patients also had maxillary augmentation. Most patients had Class III or IV mandibular atrophy, and had outpatient surgery with the subperiosteal tunneling technique. Temporary splints were worn for 24 hours post-surgery. Mean ridge height was 15.3 mm before surgery and 19.5 mm after 12 months, an augmentation of 4.2 mm. Predictable compaction occurred largely in the first few months after denture loading. Most patients, surgeons, and prosthodontists assessed the results of the procedure as good to excellent at 1 year following implantation. Adverse experiences, largely dehiscence and paresthesia, tended to resolve over time. Sera from ten patients demonstrated antibodies to bovine collagen that were not clinically significant. Alveolar augmentation with collagen/hydroxylapatite achieved clinically significant results that compared favorably with those achieved with other types of ceramic implants.
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A multicenter study was undertaken to evaluate a new alveolar ridge augmentation material composed of purified fibrillar collagen and particulate hydroxylapatite (PFC/HA). In a study of 77 patients and 99 reconstructed ridges, this material provided superior handling properties over HA alone as evidenced by its ease of surgical placement and manipulation, and the rarity of particle migration or displacement. Moreover, the rapid development of ridge firmness and stability allowed for the loading of dentures within three to six weeks. Prosthodontist evaluations and surveys of patient satisfaction showed great satisfaction with denture fit, comfort, esthetics, speech, and ability to masticate.
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A facial impression technique that uses a thermoplastic splint material as a custom tray has been described. The use of this technique simplifies a time-consuming and cumbersome procedure for both the patient and the dentist.
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A fixed prosthodontic curriculum survey was mailed to 60 U.S. dental schools; 42 surveys were returned. The results were compared with those of Part III of the study. Comparisons and their implications were discussed.
The clinical implication of this study is that some improvement in the corrosion resistance of denture bases made with aluminum alloy D-214 may be obtained by anodization. However, since this study does not exactly duplicate an oral environment or take into consideration the variation in oral environments, it cannot be assumed that the additional corrosion resistance would be discernible in a particular patient.
An analysis of the lateral condylar inclination adjustment of the slot-track semiadjustable articulator was performed by using a fully adjustable articulator as a simulated patient. Pantographic tracings were made and transferred to the semiadjustable articulator. The lateral condylar inclination of the articulator was then rotated to allow it to follow the pantographic tracings as closely as possible. The results indicate that the Hanau formula or an arbitrary setting of 15 to 20 degrees does not provide the most accurate articulator setting possible.
A removable prosthodontic curriculum questionnaire was mailed to 60 United States dental schools. Fifty-one were returned. The results were compared with those of Part I of the study, the removable prosthodontic laboratory survey. The comparisons and their implications were discussed.
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This study evaluated the treatment needs of 44 overdenture patients who had worn their dentures for at least 5 years. There were 135 abutment teeth involved, 35 in the maxillae and 100 in the mandible. Recall rates varied from a low of 27.6% to a high of 73.7%. The attrition rate was 20.5% after 5 years. The caries rate varied from a low of 2.7% to a high of 20.6%, and periodontal treatment was required by 94% of the subjects after 5 years. Only 39.4% of the subjects required adjustments, repairs, relines, or remakes of their overdentures during this time. The study showed that the success of overdentures depended on maintaining oral hygiene at an adequate level and at least yearly recalls to maintain gingival health.