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At least 1,027 records · Page 57Linked to original sources
PubMed1976

Registrations for relating the mandibular cast to the maxillary cast based on Kennedy's classification system.

Accurate registrations of centric relation are mandatory for many aspects of diagnosis and treatment. Registrations can be obtained with a variety of techniques. However, each technique must give consideration to such factors as: the character and location of tooth support, the quantity and quality of soft-tissue support, the location of dentulous and edentulous regions, the neuromuscular control of the patient, and the physical characteristics of the registering material. Kennedy's classification system provides a guide to the selection of the method of registration.

Classification↗
PubMed1976

A study of distortion and surface hardness of improved artificial stone casts.

1. The single-pour technique is as accurate as the double-pour technique except for point 6 (palatal point). Here the double-pour technique has greater accuracy. Impression material thickness over point 6 was approximately 15 mm. 2. The double-pour technique produced specimens which had superficial hardness values significantly higher than those of casts produced by the single-pour technique. 3. Specimens made with slurry water showed no greater distortion than specimens from other techniques. Surfaces of the specimens made with slurry water were significantly harder than those of specimens made with distilled water. Both types of specimens were made with the single-pour technique. 4. No significant difference in distortion was found in specimens produced with varying thickness of irreversible hydrocolloid impression material over the occlusal pins.

Calcium↗
PubMed1978

Influence of axiopulpal line angle and proximal retention on fracture strength of amalgam restorations.

Proximal retentive grooves significantly increase the strength of amalgam restorations in Class II cavities. There were no remarkable differences that could have clinical significance between sharp or rounded axiopulpal line angles and rounded or rounded and sloped pulpal walls. Chromium-cobalt dies are effective for tests of fracture strength of amalgam restorations.

Chromium Alloys↗
PubMed1983

Mounting casts on a new plasterless plane line articulator.

A technique of mounting casts on a plane line articulator without the aid of plaster or artificial stone has been described. The advantages of this technique are: The dimensional change errors inherent in a plaster or dental stone mounting are avoided. Casts may be routinely mounted and articulated in less than 3 minutes. Casts may be removed and returned to their original position with precise reliability. The disadvantages include the lack of an adjustable horizontal condylar guidance and the lack of an anterior guide pin or anterior guidance. Further studies should be directed toward determining the accuracy of remounting casts on the instrument.

Dental Articulators↗
PubMed1985

Boxing impressions with irreversible hydrocolloid.

A boxing method that uses irreversible hydrocolloid for boxing final impressions made with four different final impression materials was described. The boxing material separated from the impression in one piece with all impression materials. No separation media was required. In addition, the accuracy of the borders of all impression materials was equally well preserved.

Colloids↗
PubMed1985

Effect of material bulk and undercuts on the accuracy of impression materials.

A truncated cone-shaped chromium steel die was used to determine the influence of the bulk of elastomeric impression material and size of undercut on the dimension of stone dies. It was found that both conditions affect the accuracy of stone dies. The possible clinical implications of the inaccuracies were discussed.

Calcium Sulfate↗