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Results for “Tissue Conditioning, Dental”

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At least 19 recordsLinked to original sources
PubMed1980

Clinical procedures in precision attachment removable partial denture construction.

A technique has been outlined for construction of a metal base precision attachment. The technique emphasizes the need for an accurate impression of the edentulous ridge and construction of a metal base. The metal base is related intraorally to the abutment restorations and fixed via a strut with autopolymerizing acrylic resin. When the relationship has been determined the replacement dentition is added to the base.

Dental Abutments↗
PubMed2005

Compatibility of tissue conditioners and dental stones: effect on surface roughness.

STATEMENT OF PROBLEM: Although the primary use of tissue conditioners is to treat abused mucosa, these materials are also frequently used as functional impression materials. No information was identified on the effect that these materials may have on the surface of the resultant dental stone cast. PURPOSE: This study evaluated the compatibility of 3 tissue conditioners with dental stones and changes in surface conditions over time. MATERIAL AND METHODS: Three tissue conditioners (COE-comfort, Soft-conditioner, and Visco-gel) and 4 dental stones (Capstone DF, New Plastone, Die Stone, and New Fujirock) were evaluated. One impression material (Examixfine) was used as a control. Tissue conditioner disks were made by pouring freshly mixed material into a polypropylene container, pressing the material down with a glass plate, and then removing the plate 2 hours later. The disks were then stored in distilled water for 0 or 24 hours, or 3, 7, or 14 days. Subsequently, each dental stone was mixed and poured over the top of each disk and allowed to remain for 60 minutes. Twenty-five disk-shaped specimens, 18 x 2 mm, for each tissue conditioner/stone cast combination were prepared. Mean surface roughness (Ra) values of the dental stone casts made from the tissue conditioners were determined using a profilometer. Five measurements for each specimen were made. Data were analyzed with 1- and 3-way analysis of variance and the Student-Newman-Keuls test (alpha=.05). Detail reproduction was also determined using a ruled test block, as specified in ISO specification 4823. RESULTS: Contribution ratios determined by 3-way analysis of variance indicated that the surface roughness values were significantly more influenced by the time of immersion in water ( P <.0005, contribution ratio rho=37%), than the type of tissue conditioner ( P <.0005, rho=19%) or dental stone used ( P <.0005, rho=1%). The best surface quality was obtained with a New Fujirock cast (0.81 +/- 0.06 microm), followed by New Plastone (0.83 +/- 0.12 microm) and Die Stone (0.85 +/- 0.05 microm) casts, in combination with Visco-gel without immersion in water, and those were nearly equivalent in surface roughness to a Die stone cast from Examixfine. The surface roughness values of all specimens, especially the COE-comfort/stone cast combinations, significantly increased with tissue conditioner immersion time ( P <.0005). Visco-gel tended to produce a better surface quality during the test periods than the other materials. All stone casts made from the tissue conditioners not immersed in water reproduced 20-microm or 50-microm lines, while the detail diminished over time with immersion. CONCLUSION: The type of tissue conditioner, and especially immersion time, had a significant effect on the surface quality of dental stone casts. The type of dental stone used is less important.

Acrylic Resins↗
PubMed1997

Influence of tissue conditioning materials upon the crystalline structure of dental stone and improved dental stone.

Dental stone and improved dental stone were crystallised in contact with six commercial tissue conditioning materials. Their influence on the crystalline structure of dental stone and improved dental stone were investigated using a scanning electron microscope. Tissue conditioning materials cause horizontal orientation of the crystals of calcium sulphate CaSO4 2H2O dihydrate.

Calcium Sulfate↗
PubMed2006

[Stress releasing effect of tissue conditioning materials for interim dentures after implant installation].

PURPOSE: The main objective of this study was to examine the influence of the thickness and its longitudinal change within the limited denture space on the stress releasing effect for installed implants during the healing period of a two-stage procedure. METHODS: As for the tissue conditioning material, Tissue Conditioner (Shofu, Kyoto, Japan) with the designated powder liquid ratio was used. The force transmitted to the implant with the material 5 min after the mixing was measured by a miniature pressure sensor in the position of the implant head (Kyowa, Tokyo, Japan). Measurements were repeated with the material preserved in the water for one and two weeks. Load of 2 kg was applied with a 3-mm diameter round tip using a static loading machine for 2 min to the center of the flat type denture model. The model consisted of denture, mucosa, tissue conditioning material and implant where the first three variables were changed as in the oral cavity. Influence of thickness of each variable was examined longitudinally. RESULTS: Force measured with any thickness of tissue conditioning material was smaller than that without the material. The stress releasing effect did not change with change of the longitudinal material property up to two weeks. CONCLUSIONS: Within the limitations of our study, it was suggested that the stress releasing effect of the tissue conditioning material for the installed implant was not influenced by the thickness or change of longitudinal property.

Dental Implants↗
PubMed1996

Preliminary silicone putty casts: diagnosis to final impression for complete dentures.

Silicone putty casts are useful for articulating existing dentures for evaluation and problem solving before relining procedures are performed or a new prosthesis is made. Tissue health may require significant modification of the existing dentures and treatment with tissue-conditioning material before final impressions are made. This practical procedure uses a functional impression that substitutes for a quality preliminary impression and combines tissue conditioning, a functional impression, silicone putty cast, custom final impression tray, and a final impression for a complete denture.

Dental Impression Technique↗
PubMed1979

Assessment of tissue conditioning materials for functional impressions.

The validity of two types of tissue conditioning materials was studied and compared with that of two commonly used impression materials. The effect of three important factors on the accuracy of the impressions was observed. These factors were thickness of the impression material, time of compression of the impression, and the time interval before pouring the impression. A chrome-cobalt master cast was specially designed and 500 impressions were made and poured, resulting in 900 casts. Conclusions reached from this investigation were that: 1. Visco-Gel and Coe-Comfort tissue conditioning materials can be used as impression materials. 2. The dimensional accuracy of Visco-Gel is better than that of the Coe-Comfort impressions. 3. There is no significant difference between using a tray with a space of 1.5 mm or 3.0 mm for the impression material. 4. The less bulky the impression, the less time is required for compression with fewer inaccuracies. 5. It is preferable to pour the cast in the impression immediately or within 2 hours. 6. Both kinds of materials tested can be used as duplicating materials under certain conditions.

Dental Impression Materials↗