Document Detail

Evaluation of accuracy of multiple dental implant impressions using various splinting materials.
MedLine Citation:
PMID:  20209185     Owner:  NLM     Status:  MEDLINE    
PURPOSE: The aim of the present study was to compare the accuracy of casts obtained from nonsplinted and splinted direct impression techniques employing various splinting materials for multiple dental implants. MATERIALS AND METHODS: A reference model with four Nobel Replace Select implant replicas in the anterior mandible was fabricated with denture base heat-curing acrylic resin. Impressions of the reference model were made using polyether impression material by direct nonsplinted and splinted techniques. Impressions were divided into four groups: group A: nonsplinted technique; group B: acrylic resin-splinted technique; group C: bite registration addition silicone-splinted technique; and group D: bite registration polyether-splinted technique. Four impressions were made for each group and casts were poured in type IV dental stone. Linear differences in interimplant distances in the x-, y-, and z-axes and differences in interimplant angulations in the z-axis were measured on the casts using a coordinate measuring machine. RESULTS: The interimplant distance D1y showed significant variations in all four test groups (P = .043), while D3x values varied significantly between the acrylic resin-splinted and silicone-splinted groups. Casts obtained from the polyether-splinted group were the closest to the reference model in the x- and y-axes. In the z-axis, D2z values varied significantly among the three test groups (P = .009). Casts from the acrylic resin-splinted group were the closest to the reference model in the z-axis. Also, one of the three angles measured (angle 2) showed significant differences within three test groups (P = .009). Casts from the nonsplinted group exhibited the smallest angular differences. CONCLUSION: Casts obtained from all four impression techniques exhibited differences from the reference model. Casts obtained using the bite registration polyether-splinted technique were the most accurate versus the reference model, followed by those obtained via the acrylic resin-splinted, nonsplinted, and bite registration addition silicone-splinted techniques.
Rasasubramanian Hariharan; Chitra Shankar; Manoj Rajan; Mirza Rustum Baig; N S Azhagarasan
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Publication Detail:
Type:  Comparative Study; Evaluation Studies; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  The International journal of oral & maxillofacial implants     Volume:  25     ISSN:  0882-2786     ISO Abbreviation:  Int J Oral Maxillofac Implants     Publication Date:    2010 Jan-Feb
Date Detail:
Created Date:  2010-03-08     Completed Date:  2010-05-03     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8611905     Medline TA:  Int J Oral Maxillofac Implants     Country:  United States    
Other Details:
Languages:  eng     Pagination:  38-44     Citation Subset:  D; IM    
Department of Prosthodontics, Ragas Dental College and Hospital, Tamil Nadu, India.
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MeSH Terms
Acrylic Resins
Analysis of Variance
Dental Implantation, Endosseous*
Dental Impression Materials*
Dental Impression Technique*
Dental Models
Dental Prosthesis Design*
Dental Prosthesis, Implant-Supported*
Jaw Relation Record*
Reg. No./Substance:
0/Acrylic Resins; 0/Dental Impression Materials; 0/Polyvinyls; 0/Siloxanes; 0/vinyl polysiloxane; 122168-68-7/Ramitec

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