CLINICAL OUTCOME OF SPIRAL IMPLANTS INSERTED IN THE MOLAR REGION

M. Danza¹ and G. Caccianiga²

¹Senior Lecturer, Dental School, University of Pescara-Chieti, Italy
²School of Medicine and Surgery, University of Milano-Bicocca, 20900 Monza, Italy

Correspondence to:
Gianluigi Caccianiga, DDS
School of Medicine and Surgery,
University of Milano-Bicocca,
20900 Monza, Italy
e-mail: gianluigi.caccianiga@unibi.it

Received: 01 August 2015 Accepted: 15 September 2015

2038-4106(2015) Copyright © by BIOLIFE This publication and/or article is for individual use only and may not be further reproduced without written permission from the copyright holder. Unauthorized reproduction may result in financial and other penalties. Disclosure: all authors report no conflicts of interest relevant to this article.

ABSTRACT

In the last decade, spiral implants were introduced in the market as a new tool for oral rehabilitation. A retrospective study has been planned to verify this system’s effectiveness in replacing missing molars. A series of 67 implants inserted to replace molars were analyzed. Several variables related to the patient, such as anatomic site, implant, and surgery, were investigated. Implant failure and peri-implant bone resorption were predictors of clinical outcome. Cox regression was then performed to detect statistically associated variables with the clinical outcome. From June 2010 to June 2014, 234 spiral implants were inserted in patients. Specifically, 67 fixtures were inserted to replace missing molars. Forty-six were inserted in females and 21 males with a median age of 51 (max-min 32-80, STD = 14 years). Two failed (i.e., survival rate SVR =97%), and 9 had a crestal bone resorption higher than 1.5 mm in the first year and an additional 0.2 mm in each following year of follow-up. (i.e., success rate SCR = 86.56%). The mean follow-up was 14 months (max-min 1-41, STD = 9 months). Among the studied variables, none reached a significant statistical value. SVR and SCR were 97% and 86.56% in our series, respectively. Statistical analysis demonstrated that no studied variable impacted survival (i.e., lost implants) and clinical success (i.e., crestal bone resorption). Spiral implants are reliable devices to replace molars.

KEYWORDS: spiral, implant, fixture, bone, remodeling, resorption, ridge, alveolar