IADR Abstract Archives
Maryland-bridge to prevent marginal-bone-loss of not-submerged implants before loading
Objectives: One to 6 months after implant placement is a critical time/period responsible for crestal bone loss that may affect osseointegration.
The study aims to explore the effectiveness of provisional Maryland-bridge (MB) applied to prevent marginal bone loss around implants placed in edentulous crestal bone during osseointegration period.
Methods: Healthy, non-smoker patients were included in the study. Transmucosal titanium implants (Sweden&Martina, Padova, Italy) were placed not-submerged with cover screws at gingival level in edentulous crestal bone with flapless technique.
Eighteen patients randomly received a MB (protected-group), 21 did not receive any prosthetic provisional rehabilitation (not-protected-group). Each MB remained in place for 3 months and removed before impression.
After 3 months abutments were applied and provisional resin crowns cemented. Definitive crowns were cemented after 4 months from placement.
Periapical Rx were taken using paralleling technique before and after implant insertion, at 1,3 months (pre-loading time) and after 6 months (post-loading time). MBL was evaluated in double-blind on scanned periapical radiographs and assessed at mesial and distal side of implants (MBL-M and MBL-D). Cervical Enamel Junction migration of mesial and distal adjacent teeth were also measured (CEJ-M and CEJ-D), (ANOVA-test).
Results: All implants were safe from complications after 6 months. Overall drop-out was 8.8% in protected-group and 0% in not-protected-group. Mean MBL-M, MBL-D, CEJ-M and CEJ-D values at 1-6 months are showed in Figure a-d, respectively.
Protected-group showed the most stable MBL at 6 months, not statistically different from baseline, 1 and 3 months.
Not-protected-group demonstrated statistically different crestal bone loss from baseline and compared to protected-group. Interestingly, irrespective of the presence or not of MB, CEJ-M and CEJ-D was stable during time.
Conclusions: The use of MB in not-submerged implants is a safe procedure that prevents additional bone loss around implants.
The study aims to explore the effectiveness of provisional Maryland-bridge (MB) applied to prevent marginal bone loss around implants placed in edentulous crestal bone during osseointegration period.
Methods: Healthy, non-smoker patients were included in the study. Transmucosal titanium implants (Sweden&Martina, Padova, Italy) were placed not-submerged with cover screws at gingival level in edentulous crestal bone with flapless technique.
Eighteen patients randomly received a MB (protected-group), 21 did not receive any prosthetic provisional rehabilitation (not-protected-group). Each MB remained in place for 3 months and removed before impression.
After 3 months abutments were applied and provisional resin crowns cemented. Definitive crowns were cemented after 4 months from placement.
Periapical Rx were taken using paralleling technique before and after implant insertion, at 1,3 months (pre-loading time) and after 6 months (post-loading time). MBL was evaluated in double-blind on scanned periapical radiographs and assessed at mesial and distal side of implants (MBL-M and MBL-D). Cervical Enamel Junction migration of mesial and distal adjacent teeth were also measured (CEJ-M and CEJ-D), (ANOVA-test).
Results: All implants were safe from complications after 6 months. Overall drop-out was 8.8% in protected-group and 0% in not-protected-group. Mean MBL-M, MBL-D, CEJ-M and CEJ-D values at 1-6 months are showed in Figure a-d, respectively.
Protected-group showed the most stable MBL at 6 months, not statistically different from baseline, 1 and 3 months.
Not-protected-group demonstrated statistically different crestal bone loss from baseline and compared to protected-group. Interestingly, irrespective of the presence or not of MB, CEJ-M and CEJ-D was stable during time.
Conclusions: The use of MB in not-submerged implants is a safe procedure that prevents additional bone loss around implants.
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