To Evaluate the Effect of Shef life on Depth of Cure of Polyacid-Modified composite - An In Vitro Study
Objective: The present study aimed to compare the curing depth of chemically similar Polyacid-modified compositeresins (PAM-C) having different expiry periods. Methods: The curing depth of the PAM-C, Dyract Extra (Dentsply, U.K.) was determined for a near expiry and a longexpiry material using...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Dow University of Health Sciences
2010-08-01
|
| Series: | Journal of the Dow University of Health Sciences |
| Subjects: | |
| Online Access: | https://www.jduhs.com/index.php/jduhs/article/view/1317 |
| _version_ | 1797817558062071808 |
|---|---|
| author | Affan Ahmad Syed Yawar Ali Abidi Shahbaz Ahmed |
| author_facet | Affan Ahmad Syed Yawar Ali Abidi Shahbaz Ahmed |
| author_sort | Affan Ahmad |
| collection | DOAJ |
| description | Objective:
The present study aimed to compare the curing depth of chemically similar Polyacid-modified compositeresins (PAM-C) having different expiry periods.
Methods:
The curing depth of the PAM-C, Dyract Extra (Dentsply, U.K.) was determined for a near expiry and a longexpiry material using a scraping method based on ISO 4049:2000. Samples were light-cured (800 mW/cm at 40 seconds)in plastic mould. Immediately after light-curing the cylinder shaped material was removed from the mould, height ofthe cylinder of cured material was measured by using digital caliper and taken as the curing depth. The means of thecu rin g d epth o f two m a te ria ls were su b je c ted to two sample in d ep e n d e n t t te s t u sin g SPSS.
Results:
The mean value of depth of cure for near expiry PAM-C (Group-A) was 6.389 mm ( sd ± .202 ) and that oflong expiry material PAM-C (Group-B) was 7.087 mm ( sd ± .149 ). The curing depth differed significantly betweenthe materials of the two groups (P<0.001).
Conclusion:
The curing depth greatly varies between the materials. It may be inferred that the curing depth of the twoassigned groups of PAM-Cs depend on the period of expiry of the material.
|
| first_indexed | 2024-03-13T08:55:16Z |
| format | Article |
| id | doaj.art-4b619776da7343ceb9236c20a06856f1 |
| institution | Directory Open Access Journal |
| issn | 1995-2198 2410-2180 |
| language | English |
| last_indexed | 2024-03-13T08:55:16Z |
| publishDate | 2010-08-01 |
| publisher | Dow University of Health Sciences |
| record_format | Article |
| series | Journal of the Dow University of Health Sciences |
| spelling | doaj.art-4b619776da7343ceb9236c20a06856f12023-05-29T03:11:40ZengDow University of Health SciencesJournal of the Dow University of Health Sciences1995-21982410-21802010-08-0142To Evaluate the Effect of Shef life on Depth of Cure of Polyacid-Modified composite - An In Vitro StudyAffan Ahmad0Syed Yawar Ali Abidi1Shahbaz Ahmed2Department of Science of Dental Materials, Dr. Ishrat-ulEbad Khan Institute of Oral Health Sciences , Dow University of Health Sciences, Karachi, Pakistan.Department of Operative Dentistry, Dr. Ishrat-ul-Ebad Khan Institute of Oral Health Sciences , Dow University of Health Sciences, Karachi, Pakistan.Department of Operative Dentistry, Dr. Ishrat-ul-Ebad Khan Institute of Oral Health Sciences , Dow University of Health Sciences, Karachi, Pakistan.Objective: The present study aimed to compare the curing depth of chemically similar Polyacid-modified compositeresins (PAM-C) having different expiry periods. Methods: The curing depth of the PAM-C, Dyract Extra (Dentsply, U.K.) was determined for a near expiry and a longexpiry material using a scraping method based on ISO 4049:2000. Samples were light-cured (800 mW/cm at 40 seconds)in plastic mould. Immediately after light-curing the cylinder shaped material was removed from the mould, height ofthe cylinder of cured material was measured by using digital caliper and taken as the curing depth. The means of thecu rin g d epth o f two m a te ria ls were su b je c ted to two sample in d ep e n d e n t t te s t u sin g SPSS. Results: The mean value of depth of cure for near expiry PAM-C (Group-A) was 6.389 mm ( sd ± .202 ) and that oflong expiry material PAM-C (Group-B) was 7.087 mm ( sd ± .149 ). The curing depth differed significantly betweenthe materials of the two groups (P<0.001). Conclusion: The curing depth greatly varies between the materials. It may be inferred that the curing depth of the twoassigned groups of PAM-Cs depend on the period of expiry of the material. https://www.jduhs.com/index.php/jduhs/article/view/1317Depth of cureShelf lifePolyacid modified composite |
| spellingShingle | Affan Ahmad Syed Yawar Ali Abidi Shahbaz Ahmed To Evaluate the Effect of Shef life on Depth of Cure of Polyacid-Modified composite - An In Vitro Study Journal of the Dow University of Health Sciences Depth of cure Shelf life Polyacid modified composite |
| title | To Evaluate the Effect of Shef life on Depth of Cure of Polyacid-Modified composite - An In Vitro Study |
| title_full | To Evaluate the Effect of Shef life on Depth of Cure of Polyacid-Modified composite - An In Vitro Study |
| title_fullStr | To Evaluate the Effect of Shef life on Depth of Cure of Polyacid-Modified composite - An In Vitro Study |
| title_full_unstemmed | To Evaluate the Effect of Shef life on Depth of Cure of Polyacid-Modified composite - An In Vitro Study |
| title_short | To Evaluate the Effect of Shef life on Depth of Cure of Polyacid-Modified composite - An In Vitro Study |
| title_sort | to evaluate the effect of shef life on depth of cure of polyacid modified composite an in vitro study |
| topic | Depth of cure Shelf life Polyacid modified composite |
| url | https://www.jduhs.com/index.php/jduhs/article/view/1317 |
| work_keys_str_mv | AT affanahmad toevaluatetheeffectofsheflifeondepthofcureofpolyacidmodifiedcompositeaninvitrostudy AT syedyawaraliabidi toevaluatetheeffectofsheflifeondepthofcureofpolyacidmodifiedcompositeaninvitrostudy AT shahbazahmed toevaluatetheeffectofsheflifeondepthofcureofpolyacidmodifiedcompositeaninvitrostudy |