[Show abstract][Hide abstract] ABSTRACT: A spiral implant (SPI) is a conical internal helix implant with a variable thread design which confers the characteristic of self drilling, self tapping, and self bone condensing. The effectiveness of this type of implant has been reported in several clinical situations. However, because there are no reports that specifically focus on one of the biggest challenges in oral rehabilitation, that is, full arch rehabilitation, it was decided to perform a retrospective study. The study population was composed of 23 patients (12 women and 11 men, median age 57 years) for evaluation and implant treatment between January 2005 and June 2009. Two-hundred six spiral family implants (SFIs) were inserted with a mean postloading follow-up of 23 months. Several variables were investigated: demographic (age and gender), anatomic (maxilla and mandible, tooth site), implant (type, length, and diameter), surgical (surgeon, postextractive, flapless technique, grafts), and prosthetic (implant/crown ratio, dentition in the antagonist arch, type of loading, and computerized tomography [CT] planning) variables. Implant loss and peri-implant bone resorption were evaluated. Univariate and multivariate tests were performed. Survival and success rates were 97.1% and 82.5%, respectively. Only implant length and implant/crown ratio showed statistical significance in determining a better clinical outcome. In conclusion, SFIs are a reliable tool for the most difficult cases of oral rehabilitation. No differences were detected among implant type. Length and implant/crown ratio can influence the crestal bone resorption with better result for longer fixtures and a higher implant/crown ratio. In addition, banked bone derived from living donors can be used to restore alveolar ridge augmentation without adverse effects. Finally, flapless and CT-planned surgery did not significantly increase the clinical outcome in most complex rehabilitation.
[Show abstract][Hide abstract] ABSTRACT: Ectodermal dysplasia (ED) is a congenital syndrome characterized chiefly by abnormalities of tissues of ectodermal origin, namely skin, nails, hair, and teeth. Dental treatment of patients with ED is necessary, because it affords the opportunity to develop normal forms of speech, chewing, swallowing, and normal facial support. Because there are few reports focusing on implants inserted in bone grafted in patients affected by ED. This is a retrospective study of 78 implants inserted in 8 patients to detect those variables acting on survival and crestal bone remodeling around the implant neck in such subjects.
Seventy-eight fixtures were analyzed. Several patient-related (age and gender), anatomical (maxilla and mandible, tooth site), implant (type, length, and diameter), surgical (sites and types of grafts), and prosthetic (type of loading and implant/crow ratio) variables were investigated. Implant failure and peri-implant bone resorption were considered as predictors of clinical outcome. Kaplan-Meier algorithm and Cox regression were then performed to detect those variables statistically associated with the clinical outcome.
Implant length and diameter ranged from 11.5 to 18 mm and from 3.5 to 6.0 mm, respectively. Implants were inserted to replace 19 incisors, 19 cuspids, 21 premolars, and 19 molars. One implant was lost. On the contrary, implant' length, grafted sites, and type of loading have an impact on univariate analysis, but this datum was not confirmed by multivariate algorithm.
The use of dental implants and bone grafts to orally rehabilitate patients affected by ED is a valuable service with no difference in the results compared with unaffected patients, at least in adults.
[Show abstract][Hide abstract] ABSTRACT: PURPOSE: In the last decade, several investigators have reported that autografts can be used to restore alveolar volume prior
to implant insertion successfully. However, no report is available comparing implant inserted into calvarial, mandibular and
iliac crest bone autografts. MATERIALS AND METHODS: A retrospective study on 261 implants inserted in 42 patients was performed.
Several variables related to patients, anatomic sites, implants and grafts were investigated. Implant's failure and peri-implant
bone resorption were considered as predictor of clinical outcome. The Kaplan–Meier algorithm and Cox regression were then
performed to detect those variables statistically associated with the clinical outcome. RESULTS: A total of 261 implants were
inserted: 89 (34.1%) into the mandible and 172 (65.9%) into the maxilla. Nine different implant types were used. Implant length
and diameter ranged from 8 to 15 mm and from 3.5 to 6.0 mm, respectively. Implants were inserted to replace 42 incisors, 32
cuspids, 77 premolars and 110 molars. The mean post-loading follow-up was 32 months. No implant was lost (i.e. survival rate
SVR = 100%) and no differences were detected amongst the studied variables. On the contrary, crestal bone resorption correlates
with jaws site and implant type. CONCLUSION: Implants can be inserted in autografted jaws successfully although a higher resorption
could be expected in the molar region. In addition the type of implant can have an impact on clinical outcome.
KeywordsKaplan–Meier algorithm-Cox regression-Autograft-Implant-Rehabilitation
international journal of stomatology & occlusion medicine 06/2010; 3(2):89-94. DOI:10.1007/s12548-010-0050-8