Young-Seok Park1, Shin-Hye Chung, Won-Jun Shon. 1. Department of Oral Anatomy, Dental Research Institute and School of Dentistry, Seoul National University, Seoul, Korea.
Abstract
OBJECTIVE: To evaluate osseointegration in rabbit tibiae and to investigate surface characteristics of novel zirconia implants made by powder injection molding (PIM) technique, using molds with and without roughened inner surfaces. MATERIAL AND METHODS: A total of 20 rabbits received three types of external hex implants with identical geometry on the tibiae: machined titanium implants, PIM zirconia implants without mold etching, and PIM zirconia implants with mold etching. Surface characteristics of the three types of implant were evaluated. Removal torque tests and histomorphometric analyses were performed. RESULTS: The roughness of PIM zirconia implants was higher than that of machined titanium implants. The PIM zirconia implants exhibited significantly higher bone-implant contact and removal torque values than the machined titanium implants (P < 0.001). The PIM zirconia implants using roughened mold showed significantly higher removal torque values than PIM zirconia implants without using roughened mold (P < 0.001). CONCLUSIONS: It is concluded that the osseointegration of PIM zirconia implant is promising and PIM using roughened mold etching technique can produce substantially rough surfaces on zirconia implants.
OBJECTIVE: To evaluate osseointegration in rabbit tibiae and to investigate surface characteristics of novel zirconia implants made by powder injection molding (PIM) technique, using molds with and without roughened inner surfaces. MATERIAL AND METHODS: A total of 20 rabbits received three types of external hex implants with identical geometry on the tibiae: machined titanium implants, PIM zirconia implants without mold etching, and PIM zirconia implants with mold etching. Surface characteristics of the three types of implant were evaluated. Removal torque tests and histomorphometric analyses were performed. RESULTS: The roughness of PIM zirconia implants was higher than that of machined titanium implants. The PIM zirconia implants exhibited significantly higher bone-implant contact and removal torque values than the machined titanium implants (P < 0.001). The PIM zirconia implants using roughened mold showed significantly higher removal torque values than PIM zirconia implants without using roughened mold (P < 0.001). CONCLUSIONS: It is concluded that the osseointegration of PIM zirconia implant is promising and PIM using roughened mold etching technique can produce substantially rough surfaces on zirconia implants.
Authors: José Luis Calvo-Guirado; Marta Satorres; Bruno Negri; Piedad Ramirez-Fernandez; Jose Eduardo Maté-Sánchez de Val; Jose Eduardo Maté-Sánchez; Rafael Delgado-Ruiz; Gerardo Gomez-Moreno; Marcus Abboud; Georgios E Romanos Journal: Clin Oral Investig Date: 2013-10-18 Impact factor: 3.573
Authors: Hae Won Choi; Young Seok Park; Shin Hye Chung; Min Ho Jung; Won Moon; Sang Hoon Rhee Journal: Korean J Orthod Date: 2017-05-26 Impact factor: 1.372