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Chulalongkorn University Dental Journal (CUDJ)

Chulalongkorn University Dental Journal publishes peer-reviewed scientific articles in the field of dentistry and all related sciences. The journal is dedicated to the dissemination of new knowledge and information, aiming for a broad readership from basic, clinical and public health researchers to dental professionals and educators.

Current Issue

Chulalongkorn University Dental Journal (CUDJ)
Volume: 42, Issue: 2 (2019)

	Fracture resistance of endodontically treated maxillary premolars restored with lithium disilicate restorations using three different retentive techniques
	Pakwan Varapongsittikul, D.D.S. Top Chitkraisorn, D.D.S. Nichamon Chaianant, D.D.S., MSc, Ph.D. Terawat Tosiriwatanapong, D.D.S., DScD & CAGS (Prosthodontics) Boonsong Prateepsawangwong*, D.D.S., MDS (Prosthodontics)
	Page: 65 - 76
	[Abstract] [PDF] To compare fracture resistance of endodontically treated maxillary premolars restored with ceramic restorations using three retentive techniques. Forty maxillary premolars were randomly selected as a control (Group 1), composite core/crown (Group 2), fiber-reinforced composite post/ composite core/crown (Group 3) and endocrown (Group 4). All restorations were thermo-cycled and subjected to vertical loading. Fracture load and fracture modes were analyzed. The results showed that Group 3 recorded a significantly highest fracture load (2304 ± 737 N). Pairwise comparisons showed no significant difference between Group 2 (1229 ± 303 N) and group 4 (1609 ± 395 N). Type of coronal-radicular retention was significantly associated with fracture mode (p = 0.002). All fractures in Group 4 were non-restorable. After adjusting for fracture load (limited to Groups 1-3), logistic regression displayed no significant differences in fracture mode between Groups 1, 2 and 3. In conclusion, the all-ceramic crowns presented the highest fracture strength when fiber-reinforced composite posts and composite cores were included in the restoration of endodontically treated maxillary premolar. (CU Dent J. 2019;42:65-76)

	Painting-on topical fluoride gel markedly reduces the fluoride gel amount compared with tray application
	Kamonwan Sriwongchai D.D.S., Ms.c. Wacharaporn Tasachan D.D.S. Kasekarn Kasevayuth D.D.S., Ph.D. Chutima Trairatvorakul D.D.S.
	Page: 77 - 88
	[Abstract] [PDF] Background/objectives: Professional topical fluoride (F) gel application has been used to prevent dental caries with a concern about safety in young children. The aim of this study is to evaluate a paint-on technique using a No. 8 paint brush for applying professional topical F gel as an alternative method in children at a safer, lower dose compared with a tray. Materials and Methods: Twenty-one healthy children (12-15-year-old) participated in this clinical crossover study. The amounts of F gel used were 0.4 ml in the paint-on or 5.0 ml in the tray. Saliva and interproximal fluid were collected before, and immediately, 5, 10, 20, 30, and 60 min after application. F retention efficiency was evaluated by salivary flow rate, F concentration, F availability, and time half-life (t2). Results: The salivary flow rate induced by the two methods were similar. The F concentration and availability in the saliva and interproximal fluid in the paint-on technique was significantly higher than those in the tray technique. The t2 in the saliva and interproximal fluid in the paint-on technique were shorter than those in the tray. Conclusion: The novel paint-on technique effectively delivered topical F gel at a safe dose that would allow its use in young children, particularly those with a high caries risk. (CU Dent J. 2019;42:77-88)

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