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At least 181 records · Page 10Linked to original sources
PubMed1996

Removable partial denture production in Scotland.

Removable partial denture production in Scotland was studied by analyzing photographs taken of consecutive casts and dentures and reviewing prescriptions of 539 cases at a large dental laboratory. Of the casts, 70.4% were maxillary and 29.6% mandibular. The mean number of teeth present was 9.9 in the maxilla and 8.4 in the mandible. Of the partial dentures studied, 33.6% were acrylate dentures without any framework. None of these had occlusal rests, and 5.6% had clasps. Of the framework-retained maxillary dentures, the palatal strap (12.9%), horseshoe (15.8%), and anterior palatal bar (18.9%) designs were the most frequent. In the mandible, lingual bars (32.7%) and lingual plates (32.7%) predominated. Of the acrylic dentures, 89.3% were made without any instruction from the dentist. The corresponding figure for prostheses with cobalt-chromium frameworks was 15.0%.

Denture Design↗
PubMed1985

Gnathosonic monitoring of occlusion of complete and partial dentures.

The durations of occlusal sounds of edentulous patients wearing complete dentures and of partially edentulous patients with and without partial dentures were measured. In general the durations of the sounds decreased after adjustment of occlusion and after periods of wearing the dentures, but in a cross-section study of sound duration of old complete dentures (mode 16 years) an increased sound duration was observed.

Dental Occlusion, Balanced↗
PubMed1997

The influence of end abutment and cantilever fixed partial dentures on periodontal health.

The influence of end abutment and cantilever fixed partial dentures on periodontal health was examined in 12 patients with periodontally reduced residual dentition. The prosthetic appliances had been integrated for 4 to 6 years before the first follow-up examination and had no technical defects at baseline. Two follow-up examinations were performed at a 12-month interval to record clinical and microbiologic parameters of 62 abutment teeth, 45 of which were fitted with end abutment fixed partial dentures and 17 with cantilever fixed partial dentures. Both types of fixed partial dentures were represented in all patients. The patients were on a 6 to 8-week recall schedule throughout the study period and had good oral hygiene. At both examinations, subgingival plaque samples were taken at all proximal surfaces and evaluated by dark-field microscopy. The clinical parameters used were Gingival Index, Plaque Index, pocket probing depth, and attachment level. The results showed that both types of fixed partial dentures were compatible with periodontal health subject to optimal oral hygiene. The clinical parameters recorded remained stable at a very low level throughout the study period and were almost identical in both groups. A slight gain in clinical attachment level, with a mean value of 0.19 mm for abutment teeth fitted with cantilever fixed partial dentures and of 0.32 for end abutment fixed partial dentures, was registered during the study period. The composition of the subgingival plaque showed a microflora reflecting virtually health periodontal conditions. The proportion of motile rods and spirochetes was slightly elevated in both groups. In conclusion, it can be stated that both fixed partial denture types display identical characteristics in the periodontally damaged dentition and do not lead to deterioration of the periodontal situation if oral hygiene is closely monitored.

Adult↗
PubMed1995

Mechanical considerations for the implant tooth-supported fixed partial denture.

The implant tooth-supported fixed partial denture presents a biomechanical design problem, because the implant is rigidly fixed within the alveolus, and the tooth is surrounded by a periodontal ligament that allows movement. Nonrigid fixed partial denture designs are advocated by some dentists as a method of compensating for this differential movement. Rigid fixed partial denture designs, however, are advocated by many clinicians. Studies have failed to show the advantage of one design over the other. This study developed an in vitro method for testing such prosthesis designs and measured movement of a natural tooth abutment during simulated function. The movement of the natural tooth abutment was not found to change substantially with the fixed partial denture designs tested.

Alveolar Process↗
PubMed1981

Telescope retainers for removable partial dentures.

Telescope crowns used in removable partial dentures reduce the destructive horizontal and rotational occlusal forces by directing them more axially and less traumatically than other retainers. These properties are combined with excellent conditions for cross-arch and multiple abutment splinting. If one of the abutment teeth needs extracting, the denture can be repaired with acrylic resin simply by remaking the secondary crown into a pontic. The single copings can be easily cleaned due to the good accessibility around their gingival margins. They also protect the abutment teeth against caries and thermal irritation. Soldering of the primary copings or their connection with accessory bars is not necessary in rigidly constructed telescope crowns, because the secondary crowns incorporated in the superstructure provide sufficient rigidity. In addition, the splinted copings often cause inflammatory gingival hyperplasia because the solder joints are too close to the gingival margins, preventing proper hygiene maintenance. The taper configuration or vertical height of the coping, which determines the amount of load transferred to each abutment, can be planned to suit each tooth's condition and designated function in the restoration. In a fixed restoration, the load is always evenly distributed among all the abutment teeth regardless of their condition, because the crowns are permanently cemented to them. In the telescope denture, the amount of force can be individually regulated by modifying the form and leverage of the retainers, according to their position, bone support, and occlusal conditions.

Crowns↗
PubMed1988

Immediate fixed partial dentures.

This technique offers immediate fixed partial denture replacement of dentition lost in either an anterior or posterior location. It allows modification of the preextraction tooth or the diagnostic wax-up. Because the provisional restoration is made indirectly, the extraction site is not contaminated. Postoperative comfort and function for the patient is achieved.

Denture Design↗
PubMed1999

Tooth stabilization and splinting before and after periodontal therapy with fixed partial dentures.

The design and use of fixed partial dentures as a definitive restoration to stabilize and splint teeth have been reviewed. The provisionalization of the splinted patient has been described as it is incorporated into the treatment plan of patients with a weakened periodontium. The current controversy of incorporating implants in the patient requiring splinting was discussed, and recommendations are made. Dentists are encouraged to explain all potential ramifications of splinting with fixed partial dentures, including cost, frequency of office visits, and potential alterations or remakes of the prosthesis should physiologic demands surpass the capabilities of the remaining teeth.

Dental Implantation, Endosseous↗
PubMed1997

Comparison of bond strengths of denture base resins to nickel-chromium-beryllium removable partial denture alloy.

PURPOSE: In vitro bond strengths of a traditional denture base resin (Lucitone 199) and three adhesive denture base resins (Meta-Dent, Meta-Fast with liner, and Meta-Fast without liner) to treated nickel-chromium-beryllium (Ni-Cr-Be) partial denture alloy were tested with four alloy surface pretreatments (sandblast, Met-etch, Rocatec with silane, and Rocatec without silane), with or without primer (Dentsply). The Lucitone 199 resin bonded to the nonprimed sandblasted group was the control group. The hypothesis was the use of alloy pretreatments and/or primer does not improve the bond strength of denture base resins to sandblasted Ni-Cr-Be partial denture alloy. MATERIAL AND METHODS: Primed and nonprimed bonded specimens were prepared and finished, stored in 37 degrees C distilled water for 24 hours, then debonded in tension on a testing machine. The bond strength was calculated in megapascals (MPa). Five specimens were prepared and tested for each experimental condition, both with and without primer, for a total of 160 specimens. RESULTS: For three-way analysis of variance, the main effects of resins and treatment were statistically significant (p < 0.05), but the main effect of primer was not statistically significantly (p > 0.05). Without primer, the control group had the lowest bond strength (0 MPa). The three adhesive resin groups produced significantly higher bond strengths than the Lucitone resin groups. For the treated groups, nearly all sandblasted groups produced significantly lower bond strength than the other three treated groups. Meta-Dent to Met-etch treated group had the highest bond strength (23.9 MPa). With primer, the bond strengths of the Lucitone resin groups were significantly higher than the nonprimed groups, and the Lucitone resin-primed Rocatec treated group had the highest bond strength (14.8 MPa). For the three adhesive denture base resins, nearly all primed treated groups had significantly lower bond strengths than nonprimed groups. CONCLUSIONS: Without primer, the Lucitone resin-sandblast treated group (control) had the lowest bond strength (0 MPa). The Meta-Dent denture base resin with the Met-etch treated group had the highest bond strength (23.9 MPa). With primer, the Lucitone resin-primed Rocatec-silane treated group had the highest bond strength (14.8 MPa). For the adhesive denture base resins, nearly all bond strengths of the primed treated groups were significantly lower than the values of the nonprimed groups.

Acid Etching, Dental↗