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Results for “Inlays”

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At least 19 recordsLinked to original sources

PubMed1976

In vivo evaluation of marginal leakage of four inlay cements.

Marginal leakage was demonstrated in all the inlays at all time intervals with all cements by the use of the isotope Ca45. Gross marginal leakage was observed in all inlays luted with the cyanoacrylate cement at all time intervals. The setting time of this cement is very short, making it difficult to completely seat the inlay before the cement sets. The results of this study indicate that the cyanoacrylate cement is not a satisfactory luting medium for Class V inlays. Inlays cemented with EBA demonstrated leakage patterns similar to those of inlays seated with polycarboxylate and zinc phosphate cements in the specimens taken at 72 hours. In the 3 month and 6 month specimens, greater marginal leakage was seen with EBA cement than with polycarboxylate and zinc phosphate cements. Leakage patterns associated with polycarboxylate and zinc phosphate cements were very similar at all time intervals. The polycarboxylate and zinc phosphate cements showed less marginal leakage than the other two cements at 3 months and 6 months. The results of this study indicate that inlays cemented with polycarboxylate cement and zinc phosphate cement exhibit significantly less marginal leakage than the cyanoacrylate cement and EBA cement over a 6 month period of time.

Animals↗

PubMed1977

[Rheological studies on deformation for dental waxes. 2. Stress relaxation behavior of inlay wax (author's transl)].

The rheological properties of inlay wax were investigated by experiment of stress relaxation, thermal expansion, thermal analysis and X-ray diffraction. The results obtained were as follows. The solid-solid phase transition caused by phase transition of paraffin was observed. The stress relaxation curves of inlay wax were obtained at various temperature, and from these curves the stress relaxation master curve was composed by application of time-temperature superposition principle. The temperature dependence of sift factor was devided into two regions of Arrhenius type, and the activation energy was about 60 kcal/mol at the temperature lower than 23 degrees C and 120 kcal/mol at higher temperature. This fact suggests that the relaxation mechanism of inlay wax can be classified into two different modes. The relaxation mechanism at lower temperature region is explained by crystalline relaxation, and at higher temperature is considered to depend upon the solid-solid phase transition process of inlay wax. Calculating from the activation energy, for each 2 degrees C rise in temperature, the rate of rheological change for inlay wax is approximately two-fold at lower temperature region, and about four-fold at higher temperature region.

Elasticity↗

PubMed2026

Clinical performance of two lithium disilicate CAD/CAM materials in posterior Class II inlay restorations: A 48-month randomised split-mouth clinical trial.

OBJECTIVES: To compare the clinical performance of Amber Mill (AM) and IPS e.max CAD (EM) lithium disilicate computer-aided design/computer-aided manufacturing (CAD/CAM) materials in posterior Class II inlay restorations and characterise their baseline properties. METHODS: Thirty-four adults received paired AM and EM posterior Class II inlays (68 restorations) in a triple-blind randomised split-mouth trial followed for 48 months. Restorations were evaluated at baseline and annually using revised World Dental Federation (FDI) criteria, with fracture and retention as the primary endpoint. Baseline characterisation included flexural strength, shear bond strength, translucency parameter, and scanning electron microscopy. McNemar, Wilcoxon signed-rank, Friedman, one-way analysis of variance, Tukey post hoc, and inter-rater agreement analyses were used. RESULTS: At 48 months, 18 paired participants were available for primary analysis. Failures occurred in 2 of 18 AM restorations and in 3 of 18 EM restorations, corresponding to success rates of 88.9% and 83.3%, respectively, with no significant between-material difference (McNemar p = 1.000). No catastrophic bulk ceramic fracture was observed. Secondary FDI scores remained mostly within the clinically acceptable range; marginal staining deteriorated over time in both groups (p < .001) without significant between-material differences. Baseline material testing showed significant material- and translucency-dependent differences in flexural strength, shear bond strength, and translucency. CONCLUSIONS: Within the limitations of the 48-month follow-up and the tested Class II inlay indication, AM showed clinical performance comparable to EM. Observed clinical complications were related to retention or marginal/interface behaviour. CLINICAL SIGNIFICANCE: For posterior Class II lithium disilicate CAD/CAM inlays, medium-term complications were mainly retention/interface-related, suggesting adhesive-interface durability may be as important as baseline ceramic strength.

Humans↗

PubMed1977

Pulpal reaction to polycarboxylate and zinc phosphate cements used with inlays in deep cavity preparations.

The purpose of the present investigation was to compare histologically pulpal reactions beneath inlays cemented with either a zinc phosphate or a polycarboxylate cement. No inflammatory reaction was seen beneath any of the 39 deep cavity preparations in teeth without pulpal lesions and with an inlay cemented with polycarboxylate cement. In the contralateral teeth, under 39 inlays cemented with zinc phosphate cement, an inflammatory reaction was seen beneath two cavity preparations. In one, bacteria were found on the floor of the preparation. On the basis of this result and the findings of our earlier investigations, it may be warranted to conclude that neither the polycarboxylate cement nor the zinc phosphate cement has any notable irritating effect on the pulp. If the irritation occurs after cementation of the restoration, it may be caused by debris containing bacteria and left behind on the prepared surfaces by bacterial growth from the surface of the tooth. The findings underline the importance of removing grinding debris and bacteria before cementation of the restoration.

Acrylic Resins↗

PubMed1976

[Filling therapy with special reference to experimental studies on model-cast inlays].

By way of introduction, the authors report the results from clinical and radiographic examination of teeth with inlays restorations. In view of further corroboration of the clinical results with modelcast inlays, the authors measured the marginal adaptation of inlays made of Goplat 203 and Sena 65, respectively. The difference in the average marginal adaptation between Goplat 203 and Sena 65 is insignificant, amounting to 3.6 mum in favour of the gold alloy, which permits to recommend Sena as a casting alloy for posterior teeth.

Dental Alloys↗

PubMed1976

[Epidemiologic studies. I. Secondary caries in tooth areas restored by silver-tin-amalgam, silicate cement or inlays].

On the basis of epidemiologic studies on 10 106 sugjects from the population of the town of Rostock, the authors deal with the frequency of filled tooth areas and their affection by secondary caries with special regard to filling materials (silver-tin amalgam, silicate cement, inlay). The low frequency of secondary caries in tooth areas restored by means of inlays is noteworthy. Finally, the authors give recommendations for practice.

Adolescent↗

PubMed1975

[The model casting method for inlays and bridgework].

The authors deal with the advantages and disadvantages of the direct and the indirect method of inlay making and describe the precision casting technique for inlays and bridges. Furthermore, they present the telescopic tray which has been developed in the Rostock Clinic. This tray permits to apply the impression material under increased pressure. The use of the compound embedding material and dental alloys indicated allows to obtain good treatment results in a rational manner.

Dental Casting Technique↗

PubMed1979

[Inlays as support for removable cast partial dentures].

On the basis of follow-up examinations in patients with removable cast partial prostheses, the author emphasizes the necessity of placing inlays as interlocks on abutment teeth, and he gives advice on inlay designs which are in conformity with prosthetic therapy.

Dental Abutments↗

PubMed1975

Lumbar fusion using facet inlay grafts.

A long-term analysis of 106 patients who had lumbar fusions between 1959 and 1969 is reported. The method used in this series was an inlay bone graft pointed at each end and beveled at its cephalic portion to permit easier insertion. The sacroiliac ligaments are not disturbed while obtaining the bone graft and no sacroiliac complications have occurred. The necessity for determining whether any psychophysiologic symptoms exist before a spinal fusion is emphasized. This study found the inlay facet technic of spinal fusion to be a worthwhile procedure in properly selected cases of low back and leg pain.

Adolescent↗

PubMed1978

Late results of skin inlay urethroplasty.

Sixty-two patients undergoing either one-stage or two-stage skin inlay urethroplasty for stricture of the urethra have been reviewed. The success rate and incidence of complications are discussed. The technique of skin inlay urethroplasty requires a considerable degree of surgical expertise and a similar skill in clinical evaluation is required in the selection of patients for this procedure.

Adolescent↗

PubMed1978

Tube-inlay graft for abdominal aortic aneurysms. Technique and results.

The usefulness of the tube-inlay graft technique for abdominal aortic aneurysms has been tested in 74 consecutive patients. The operative technique is described. In nearly half of the patients this technique could be used. The other patients received a conventional bifurcation prosthesis. Especially in the patient with a ruptured abdominal aortic aneurysm the tube-inlay-graft technique, because of its simplicity, shorter operating time and less blood loss is to be preferred. Since introduction of the method, the mortality in ruptured cases decreased from 46 to 24 percent.

Aorta, Abdominal↗

PubMed1976

An evaluation of techniques for finishing margins of gold inlays.

The following conclusions on finishing margins of gold inlays were reached: 1. Instruments should be rotated perpendicular to the margin from gold to enamel. 2. Green stones produce rough surfaces that are not easily smoothed by finer instruments. 3. Hand burnishers and rubber points are not effective in producing gross marginal closure. 4. The best instruments for finishing occlusal margins are round steel burs, finishing burs, or white finishing stones. 5. When finishing occlusal margins, it is important to use an instrument small enough to gain access to the depth of grooves and fissures. 6. Proximal preparations made with a secondary flare yield castings with better "as cast" and finished margins than those preparations made with a butt joint. 7. The best instruments for finishing proximal margins are flexible paper discs. Usually, one fine sand or fine cuttle discs are necessary. 8. There is an indication that castings made from slightly overwaxed patterns can be finished to produce better margins than those made from patterns waxed exactly to the margins.

Dental Enamel↗

PubMed1975

Bases for gold inlays and crown restorations.

Modified zinc oxide-eugenol and calcium hydroxide cements are frequently used as bases beneath restorations. Investigation reveals that the bond strength between different types of dement may be less than that between different consistencies of the same type of dental cement. In some clinical situations, the choice of the type of cement as a base forming material beneath inlays and crowns should be made bearing in mind the type of luting material to be used.

Calcium Hydroxide↗

PubMed1977

[The importance of the method investing for accuracy of Sipal inlays].

The fit of three-area inlays (phantom) made from Sipal 306 was determined in an experimental study by means of microscopic measurements of the gap width. Six different investment techniques were compared. The necessity of processing Expansit adequately is emphasized. Core embedding using the LAW precision-casting investment compound is recommended.

Dental Casting Investment↗

PubMed1979

Inlayed teeth of ancient Mayans: a tribological study using the SEM.

A study has begun of inlayed teeth of Meso-American Indian skulls using scanning electron microscopy and modelling techniques. Round cavity preparations 2-3 mm in diameter and 1-2 mm deep had been cut through the enamel and just into the underlying dentin of the teeth. The vertical walls of the preparation met the floor in either a square, rounded or undercut form. Towards its center, the floor was occasionally elevated, sometimes depressed and commonly rounded. Closer examination showed abrasion anomalies as concentric, shallow grooves cut into the tooth tissue. A modification of the Semenovian principle was employed to determine the tool: 1) from the marks registered the the cavity and 2) the outline form of the preparation itself. Preparing cavities experimentally in teeth using wood and stone drills and sand as an abrasive produced certain characteristics consistent with those in the Meso-American teeth in which wooden drills created a variety of cutting patterns which included flat, elevated and depressed floors in the preparations. We have tentatively concluded that suggestions for the use of a tubular drill does not adequately explain the variety of forms encountered and that the cutting patterns were more consistent with the use of a wooden drill and sand.

Dental Cavity Preparation↗

PubMed1978

Evaluation of the dermal graft inlay technique for the surgical treatment of Peyronie's disease.

The results of treatment with the dermal graft inlay technique for 7 patients with Peyronie's disease and the inability to achieve intercourse are discussed. All 7 patients were unable to attain tumescence postoperatively. We believe that patients who require surgical therapy for Peyronie's disease and who have functional impotence should be treated with silicone penile implants.

Adult↗

PubMed1977

A comparative review of cylindrical inlay facet fusions for scoliosis.

Results in three series of spinal fusions with Harrington instrumentation for scoliosis were compared. Patient ages ranged from 9 to 22 years, and follow-up from 12 to 105 months. Cylindrical inlay facet grafting was done in all cases. Supplemental heterologous bone was used in the first series of 51 cases, autologous bone in the second series of 67 cases, and no supplemental bone in the third series of 68 cases. Only one infection and no paralysis or death occurred in the 186 patients. The pseudarthrosis rate was the same in each series. Similarity of results led to the conclusion that supplemental bone is not necessary with this technic. The advantages of not using supplemental bone were reduced operative time, less blood loss, and absence of donor site scar.

Adolescent↗

PubMed1977

Triple arthrodesis by inlay grafting--a method suitable for the undeformed or valgus foot.

A method of triple arthrodesis is described which involves inlay of the subtalar and midtarsal joints. It is applicable to the undeformed and valgus foot as is encountered in poliomyelitis, spasmodic flat foot, cerebral palsy and spina bifida. The operation was successful in controlling deformity and pain. The only significant complication was failure of fusion of the midtarsal joint which occurred in three of eighty-five feet (3-5%).

Adolescent↗