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Year : 2009  |  Volume : 9  |  Issue : 4  |  Page : 219-222

Comparison of five impression techniques for post space

1 Department of Prosthodonlics, Faculty of Dental Sciences, C.S.M.Medical University, Lucknow, U.P, India
2 Department of Prosthodontics, Government Dental College & Hospital, Ahmedabad, Gujarat, India

Correspondence Address:
Niraj Mishra
B-104/14, Nirala Nagar, Lucknow, U.P
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Source of Support: None, Conflict of Interest: None

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Aim: This study tries to determine the righi technique for an accurate impression of post space in all dimensions. Materials and Methods: Five freshly extracted maxillary centrai incisore are embedded in a plaster block. The post space is prepared up to five number peeso reamer leaving four-mm gutta-percha at the apex. Then we use light and medium polyvinylsiloxane; five different techniques to impress post space with and without 24-gauge anesthetic needle vent and 26-gauge reinforcement wire. In all techniques except the one which uses lentulo spirai disposable tips are used to express light polyvinylsiloxane impression material into post space. Result: We evaluate 125 samples, 25 from each technique, for the presence of voids and completeness of impressions using a magnifying lens of three-and-a-half magnification. Impression techniques produce void-free and complete impressions when anesthetic needle vent and reinforcement wires are used. The technique which uses lentulo spirai to express impression material into the post space produces complete impressions. However, as there is no provision for escape of air at the time of impression material injection into the post space, voids incorporated into the impressions produced inaccurate impressions. Conclusion: Use of anesthetic needle vent and reinforcement wire is recommended to produce accurate and void-free impressions of post space while use of lentulo spirals to express impression material into the post space is not recommended.

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