The taper of cast post preparation measured using innovative image processing technique

BMC Oral Health

Research Article

Khaled Q Al Hamad¹  Ahmad S Al Hyiasat²  Faruq A Al-Omari³ 

[1] Department of Prosthodontics, Faculty of Dentistry, Jordan University of Science & Technology, Irbid, Jordan;Faculty of Graduate Studies, Jordan University of Science and Technology, Irbid, Jordan;Hijjawi Faculty for Engineering Technology, Yarmouk University, Irbid, Jordan;

关键词: Root Canal;    Post Space;    Lateral Incisor;    Dental Student;    Endodontic Treatment;   

DOI  :  10.1186/1472-6831-10-19

 received in 2010-02-20, accepted in 2010-08-04,  发布年份 2010

来源: Springer

【 摘 要 】

BackgroundNo documentation in the literature about taper of cast posts. This study was conducted to measure the degree of cast posts taper, and to evaluate its suitability based on the anatomy aspects of the common candidate teeth for post reconstruction.MethodsWorking casts for cast posts, prepared using Gates Glidden drills, were collected. Impressions of post spaces were made using polyvinyl siloxan putty/wash technique. Digital camera with a 10' high quality lens was used for capturing two digital images for each impression; one in the Facio-Lingual (FL) and the other in the Mesio-Distal (MD) directions. Automated image processing program was developed to measure the degree of canal taper. Data were analyzed using Statistical Package for Social Sciences software and One way Analysis of Variance.ResultsEighty four dies for cast posts were collected: 16 for each maxillary anterior teeth subgroup, and 18 for each maxillary and mandibular premolar subgroup. Mean of total taper for all preparations was 10.7 degree. There were no statistical differences among the total taper of all groups (P = .256) or between the MD and FL taper for each subgroup. Mean FL taper for the maxillary first premolars was lower significantly (P = .003) than the maxillary FL taper of the second premolars. FL taper was higher than the MD taper in all teeth except the maxillary first premolars.ConclusionsTaper produced did not reflect the differences among the anatomy of teeth. While this technique deemed satisfactory in the maxillary anterior teeth, the same could not be said for the maxillary first premolars. Careful attention to the root anatomy is mandatory.

【 授权许可】

CC BY   
© Al Hamad et al; licensee BioMed Central Ltd. 2010