Survival and Success Rates of Immediately and Early Loaded Implants: 12-Month Results From a Multicentric Randomized Clinical Study

Abstract

Our objective was to compare survival and peri-implant bone levels of immediately nonocclusally vs early loaded implants in partially edentulous patients up to 12 months after implant placement. Eighty patients (inclusion criteria: general good health, good oral hygiene, 30-65 years old; exclusion criteria: head and neck irradiation/cancer, pregnancy, uncontrolled diabetes, substance abuse, bruxism, lack of opposing occluding dentition, smokers >10 cigarettes/day, need for bone augmentation procedures) were selected in 5 Italian study centers and randomized into 2 groups: 40 patients in the immediately loaded group (minimal insertion torque 30 Ncm) and 40 patients in the early loaded group. Immediately loaded implants were provided with nonoccluding temporary restorations. Final restorations were provided 2 months later. Early loaded implants were provided with a definitive restoration after 2 months. Peri-implant bone resorption was evaluated radiographically with software (ImageJ 1.42). No dropout occurred. Both groups gradually lost peri-implant bone. After 12 months, patients of both groups lost an average of 0.4 mm of peri-implant bone. There were no statistically significant differences (evaluated with t test) between the 2 loading strategies for peri-implant bone level changes at 2 (P = .6730), 6 (P = .6613) and 12 (P = .5957) months or for survival rates (100% in both groups). If adequate primary stability is achieved, immediate loading of dental implants can provide similar success rates, survival rates, and peri-implant bone resorption as compared with early loading, as evaluated in the present study.

Clinical and Radiographic Comparison between Platform‐Shifted and Nonplatform‐Shifted Implant: A One‐Year Prospective Study

“…This study yielded a 100% survival of the studied implant, after at least 1 year of loading. This result is in line with other studies using various implant systems and various surgical and loading protocols . A high primary stability is a prerequisite for implant survival.…”

Effects of different loading protocols on the secondary stability and peri‐implant bone density of the single implants in the posterior maxilla

“…They applied functional immediate loading protocol in posterior maxillary bridges and they found similar outcomes. In other clinical studies in which a non‐functional loading with no occlusal contacts was used, similar outcomes were also reported . In this study, we used temporary crowns delivered within 2 days with light centric occlusion to minimize excessive forces and to enable functional forces.…”

Correlation Between Insertion Torque and Survival Rates in Immediately Loaded Implants in the Maxilla

“…This study confirms the findings of Esposito et al, 18 Grandi et al, 19 and Capelli et al, 20 who found no statistically significant difference in prosthesis success, implant success, or marginal bone levels when comparing different loading regimens (immediate [,1 week], early [1 week-2 months], and traditional [.2 months]). Additionally, similar to the findings of Lindeboom et al, 21 this study showed that maxillary implants subjected to immediate functional loading can achieve high rates of osseointegration.…”