Evaluation of early failure of dental implants performed at Piracicaba Dental School - Unicamp from july 1996 to july 2004

Author(s)

Alexander Tadeu Sverzut

• Document type: Master's Dissertation
• Press: Piracicaba, SP.
• Institution: Universidade Estadual de Campinas (UNICAMP). Faculdade de Odontologia de Piracicaba
• Defense date: 2006-02-23

Examining board members

Roger William Fernandes Moreira; Marcelo Marota Araujo; Marcio de Moraes

• Advisor: Roger William Fernandes Moreira

Abstract

Dental implant failures can be classified in early or delayed, according to BUSER et al. (1991). The purpose of this study was to evaluate the risk factors related to early loss of dental implants. The clinical files of all patients subjected to the installation of dental implants in the Oral and Maxillofacial area, Piracicaba Dental School, State University of Campinas, in the period from 1996 to 2004, were analyzed. The inclusion criterion was the installation of dental implants in patients that had been subjected to the second surgical phase. The selected variables were: gender, age, tobacco use, alcohol use, implant installation protocol, previous reconstructive procedures, implant length, implant width, area of installation of the implants, implant surface, hormonal contraceptive use, hormone reposition therapy, arterial hypertension, hypothyroidism, hyperthyroidism and diabetes. A total of 1403 files were evaluated and 660 could be used in the study. A number of 1649 implants were installed and analyzed, and 62 of them had suffered early loss. The collected data were analyzed through univariate statistics and multivariate logistic regression, showing the significance and risk factors for early loss of dental implants. According to the employed methodology, it could be concluded that early infection is the main factor of risk related to early dental implant loss, increasing in 44 times the failure possibility when compared to implants without any type of infection; short implants (6-9mm) increase the risk of early implant loss in 4 times. Narrow implants presented significance for early loss, but are not considered risk factors. Previous reconstructive procedures, systemic conditions, addictions, gender and age did not present statistical significance and are not risk factors for early loss of dental implants (AU)