September, 2008, Vol. 10, No. 3

CONTENTS

SCIENTIFIC ARTICLES

Who is thought to be a "reliable dentist"? – Lithuanian dentists' opinion
Alina Puriene, Irena Balciuniene, Povilas Drobnys
83-88

REVIEWS
Risk factors of root resorption after orthodontic treatment
Kristina Lopatiene, Aiste Dumbravaite
89-95

SCIENTIFIC ARTICLES
Influence of laser-welding and electroerosion on passive fit of implant-supported prosthesis
Tatiana Bernardon Silva, Mauro Antonio De Arruda Nobilo, Guilherme Elias Pessanha Henriques, Marcelo Ferraz Mesquita, Magali Beck Guimaraes
96-100

Do socio-economic disparities in dental treatment needs exist in Lithuanian adolescents?
Jolanta Aleksejuniene, Vilma Brukiene
101-106

The orthodontic treatment in Lithuania: Accessibility survey
Vilija Janulyte, Alina Puriene, Laura Linkeviciene, Gailute Grigaite, Jelena Kutkauskiene
107-112

© 2008 Stomatologija

Stomatologija 2008; 10 (3): 96-100 340 KB

Influence of laser-welding and electroerosion on passive fit of implant-supported prosthesis

Tatiana Bernardon Silva, Mauro Antonio De Arruda Nobilo, Guilherme Elias Pessanha Henriques, Marcelo Ferraz Mesquita, Magali Beck Guimaraes

Summary

This study investigated the influence of laser welding and electroerosion procedure on the passive fit of interim fixed implant-supported titanium frameworks. Twenty frameworks were made from a master model, with five parallel placed implants in the inter foramen region, and cast in commercially pure titanium. The frameworks were divided into 4 groups: 10 samples were tested before (G1) and after (G2) electroerosion application; and another 10 were sectioned into five pieces and laser welded before (G3) and after (G4) electroerosion application. The passive fit between the UCLA abutment of the framework and the implant was evaluated using an optical microscope Olympus STM (Olympus Optical Co., Tokyo, Japan) with 0.0005mm of accuracy. Statistical analyses showed significant differences between G1 and G2, G1 and G3, G1 and G4, G2 and G4. However, no statistical difference was observed when comparing G2 and G3. These results indicate that frameworks may show a more precise adaptation if they are sectioned and laser welded. In the same way, electroerosion improves the precision in the framework adaptation.

---

¹Section of Prosthodontics, Department of Restorative Dentistry, Federal University of Santa Maria, Brazil

²Department of Prosthodontics and Periodontology, Piracicaba Dental School, University of Campinas, Brazil

Tatiana Bernardon Silva¹ – DDS, MSc, PhD. assoc. prof.

Mauro Antonio De Arruda Nobilo² – DDS, MSc, PhD, assoc. prof.

Guilherme Elias Pessanha Henriques² – DDS, MSc, PhD, associate prof.

Marcelo Ferraz Mesquita² – DDS, MSc, PhD, assoc. prof.

Magali Beck Guimaraes¹ – DDS, MS, PhD, clinical assist.

Address correspondence to Prof. Dr. Tatiana Bernardon Silva, Rua Marechal Floriano Peixoto, 1303/ 406, Postcode 97015-373, Santa Maria, RS, Brazil.

E-mail: tabernardon@yahoo.com