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ORIGINAL ARTICLE
Year : 2009  |  Volume : 9  |  Issue : 1  |  Page : 24-27

An in vitro study of the effect of different occlusal registration materials on the reproducibility of mounting casts


Department of Prosthodontics, University of Pittsburgh, School of Dental Medicine, Pittsburgh, Pa. 15261-1902, USA

Correspondence Address:
Donald J Pipko
University of Pittsburgh, School of Dental Medicine, Department of Prosthodontics, Room 2069 Salk Annex, Pittsburgh, Pa. 15261-1902
USA
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/0972-4052.52870

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This study compared the recorded interocclusal relationships produced using commonly used materials, determining which material accurately provides records of the interocclusal relationship for remounting. Ten occlusal registration materials were used in this study. Maxillary and mandibular casts were mounted on an articulator in maximum intercuspation. The interocclusal relationship was recorded with each specimen under a constant weight. Remounting of the mandibular cast was accomplished with the interocclusal record. The record was removed and the interocclusal contact recorded using occlusal indicator wax. The penetration of contacts was counted. This process was repeated using three specimens for each of the 10 materials used and measured. A standard deviation analysis was done on the number of penetration contacts. Stone interocclusal records were the most accurate material for occlusal registration. Wax wafer interocclusal records were the least accurate material. Clinical Application: This study suggests that the choice of material used for occlusal registration should be based on the expected time interval between occlusal registration and mounting of casts. If the mounting is expected immediately following the interocclusal registration, bite stone is the material of choice for occlusal registration. When a delay is expected between occlusal registration and mounting of the casts, non-eugenol zinc oxide may be chosen as the registration material.


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