ABSTRACT
Objective: The aim was to evaluate the survival time and success rates of dental implants in warfare victims and factors that affect implant success
Subjects and Methods: This retrospective study involved 250 Iranian warfare victims who received dental implants from 2003 to 2013. Patients' demographic characteristics, as well as the brand, diameter, length, location and failure rate of the implants were retrieved from patients' dental records and radiographs. The associations between these data and the survival rate were analyzed. Statistical analysis was carried out with X2 and log-rank tests
Results: Overall, out of the 1,533 dental implants, 61 [4%] failed. The maxillary canine area had the highest failure rate [9 of 132 implants [6.8%]], while the mandibular incisor region had the least number of failures [3 of 147 implants [2.0%]] and the longest survival time [approximately 3,182 days]. Maxillary canine areas had the shortest survival [about 2,996 days]. The longest survival time was observed in implants with 11 mm length [3,179.72 +/- 30.139 days] and 3.75-4 mm diameter [3,131.161 +/- 35.96 days], and the shortest survival was found in implants with 11.5 mm length [2,317.79 +/- 18.71 days] and 6.5 mm diameter [2,241.45 +/- 182.21 days]. Moreover, implants with 10 mm length [10.7%] and 5.5-6 mm diameter [22.2%] had the highest failure rate; however, the least failure rate occurred when the implants were 11.5 mm in length [1.9%] and 3-3.5 mm in diameter [3.1%]
Conclusions: The brand, length and diameter of implants affected the survival time, failure rate and time to failure. The location of the implant was not statistically significant regarding the mentioned factors, although it has clinical significance
ABSTRACT
Local bone augmentation in the posterior maxilla [sinus lift] before the placement of dental implants has become an acceptable treatment technique in implant dentistry. However, limited documented data are available on the results of this technique and relevant issues in Iran. The present study aimed at evaluating the surgical outcome of sinus lift and implant placement in warfare victims presenting to Ghazi Tabatabai Clinic during 2001-2008. In this retrospective study, 50 patients that had undergone sinus lift surgery were evaluated. All warfare victims presenting to the clinic who had a medical record and undergone sinus lift treatment were enrolled. Those with incomplete medical files were excluded from the study. The required data were extracted from patients' medical records and entered into a questionnaire. The mean duration of follow up was 53.32 +/- 23.05 months. The surgical success criterion was presence of osseointegrated implants in the oral cavity during the follow up period. Statistical analysis was performed using t-test and Fisher's exact test. Failed out of which 5 were in the sinus-lift area. Thus, the total success rate, the success rate of implants placed in the sinus lift area and the success rate of those out of the sinus lift area were 96.6%, 93.9% and 98%, respectively. The study results demonstrated high success rates for implants placed in sinus lift and non-sinus lift areas in warfare victims