SHORT VERSUS STANDARD LENGTH IMPLANTS: A CASE SERIES ANALYSIS.

The use of short implants (SIs) has had a great success, particularly in posterior jaws, because SIs avoid the need of alveolar crest reconstruction or sinus lifting. The aim of this study is to perform a retrospective study on 808 SIs to evaluate their survival rate. In the period between January 2008 and December 2013, 877 patients (498 females and 379 males) were operated at the BDD private Practice Clinic (Milan, Italy). The mean post-surgical follow-up was 30±17 months (max – min, 84 – 1). Eight hundred and eight implants (EDIERRE Implant System SpA, Genoa, Italy) were included in the present study, 119 (14.7%) 9.0 mm (i.e. short) and 689 (85.3%) 11.0 mm long. All patients underwent the same surgical protocol and agreed to participate in a post-operative check-up program. SPSS program was used for statistical analysis. Survival rate (SVR) was 97.4% since only 21 fixtures were lost from a total of 808 implants. Cross-tabulation between failures and immediate loading had a statistical significant value (p= 0.006) in respect to delayed loading. There were 10 failures out of 161 immediate loaded implants compared to 11 failures out of 626 delayed loaded fixtures. SIs are reliable devices for oral rehabilitation.

IMMEDIATE VERSUS DELAYED LOADING IMPLANTS: RATIONALE AND CONTROVERSIES.

Loading implants immediately after their position in alveolar bone crest is a procedure that has become popular in the last decade. The aim of this study is to evaluate the survival rate of 811 immediate loaded implants (ILIs). In the period between January 2008 and December 2013, 877 patients (498 females and 379 males) were operated at the BDD private Practice Clinic (Milan, Italy). The mean post-surgical follow-up was 30±17 months (max – min, 84 – 1). One thousasnd three hundred and eighty-six fixtures (EDIERRE Implant System SpA, Genoa, Italy) were evaluated in the present study, 811 immediately loaded and 575 loaded after 3 months. All patients underwent the same surgical protocol and agreed to participate in a post-operative check-up program. SPSS program was used for statistical analysis. Survival rate (SVR) was 97.3% since only 38 fixtures were lost from a total of 1,348 implants. Cross-tabulation between failures demonstrated slight but significant worse results for ILIs (p= 0.037). There were 28 failures out of 811 ILIs whereas only 10 fixtures were lost out of 565 implants loaded after 3 months. Immediate loading performed in selected cases is a reliable tool for oral rehabilitation.

COMPARISON BETWEEN LONG AND STANDARD LENGTH IMPLANTS10.

Long implants (LI, i.e. longer than 13 mm) are thought to give longer survival than standard length fixtures. The aim of this study is to evaluate the survival rate of 780 LI. In the period between January 2008 and December 2013, 877 patients (498 females and 379 males) were operated at the BDD private Practice Clinic (Milan, Italy). The mean post-surgical follow-up was 30±17 months (max – min, 84 – 1). One thousand seven hundred and fifty-three fixtures (EDIERRE Implant System SpA, Genoa, Italy) were evaluated in the present study, 780 15 mm long (LI) and 972 13 mm long (i.e. standard length implants). All patients underwent the same surgical protocol and agreed to participate in a post-operative check-up program. SPSS program was used for statistical analysis. Survival rate (SVR) was 97.8% since only 38 fixtures were lost from a total of 1,752 implants. Cross-tabulation between failures and jaws had a statistical significant value (p= 0.027) with worse results fox maxilla (23 failures out of 768 implants). Also tooth position has an impact (p= 0.027) since incisors plus canines had 18 failures out of 550 implants whereas premolars and molars had 20 lost fixtures out of 1,202. LIs give a small but significative advantage in oral rehabilitation.

IMPLANTS INSERTED IN POST EXTRACTIVE SOCKETS HAVE SURVIVAL RATES SIMILAR TO FIXTURES INSERTED IN HEALED BONE: A CASE SERIES STUDY.

Post-extractive implants (i.e. PEIs) are widely used to reduce surgical steps and improve patient compliance. The aim of this study is to perform a retrospective study on 2,273 PEIs to evaluate their survival rate. In the period between January 2008 and December 2013, 877 patients (498 females and 379 males) were operated at the BDD private Practice Clinic (Milan, Italy). The mean post-surgical follow-up was 30±17 months (max – min, 84 – 1). Two thousand two hundred and seventy-three PEIs (EDIERRE Implant System SpA, Genoa, Italy) were evaluated in the present study. All patients underwent the same surgical protocol and agreed to participate in a post-operative check-up program. SPSS program was used for statistical analysis. Survival rate (SVR) was 97.7% since only 53 fixtures were lost from a total of 2,273 implants. Cross-tabulation between failures and timing of loading demonstrated a statistically significant higher risk of failures in case of immediate loading (p= 0.013). There were 26 failures out of 761 immediate loaded implants against 27 lost fixtures out of 1,485 delayed loaded implants. PEIs is a reliable procedure, however surgeons should carefully select those cases which can be immediately loaded.

SURVIVAL RATES OF NARROW VERSUS STANDARD DIAMETER IMPLANTS IN DIFFERENT TREATMENT OPTIONS: A RETROSPECTIVE STUDY.

Implant dentistry has had a great success in the last decades for replacing missing teeth; however, implant surgery needs bone availability. The use of narrow diameter implants (NDIs) may be an alternative approach in patients with atrophic maxilla or mandible. The aim of this study is to perform a study on NDIs to evaluate their survival rate. In the period between January 2008 and December 2013, 877 patients (498 females and 379 males) were operated at the BDD private Practice Clinic (Milan, Italy). The mean post-surgical follow-up was 30±17 months (max – min, 84 – 1). One thousand three hundred and forty-six implants (EDIERRE Implant System SpA, Genoa, Italy) were included in the present study, 112 (8.3%) 3.3 mm (i.e. narrow) and 1,234 (91.7%) 3.75 mm wide. All patients underwent the same surgical protocol and agreed to participate in a post-operative check-up program. SPSS program was used for statistical analysis. Survival rate (SVR) was 97.25% since only 37 fixtures were lost from a total of 1,346 implants. Cross-tabulation between failure diameter did not demonstrate any statistical differences between narrow and standard diameter implants. NDIs are reliable devices for oral rehabilitation.

CLINICAL OUTCOME OF 2,560 IMPLANTS AFTER A MEAN OF 30-MONTH FOLLOW-UP.

The advantage of implantology is to replace dental loss with a fixed prosthesis even in cases of partial or total edentulism without damaging the natural teeth. In the period between January 2008 and December 2013, 877 patients (498 females and 379 males) were operated at the BDD private Practice Clinic (Milan, Italy). The mean post-surgical follow-up was 30±17 months (max – min, 84 – 1). Two thousand five hundred and sixty out of 2,657 implants had a complete record and were evaluated in the present study. The implants were of different diameters and length, inserted both in mandible (1,327) and in maxilla (1,233) with immediate or delayed loading, and with graft, split crest, post-extraction, osteo-condensation, small and big sinus lift techniques, respectively. Fifty-nine out of 2,560 implants were lost (i.e. SVR = 97.7%). Cross-tabulation between failures and timing of loading (p= 0.008) had a statistically significant value, with a worse result for immediate loading (28 failures out of 783). In other comparisons between lost implants and diameter (p= 0.074), length (p=0.293), jaws (i.e. maxilla vs mandible, p=0.208), replaced teeth (incisors plus cuspids vs premolars plus molars, p=0.074), insertion torque (p=0.528), surgeons (p=0.452) and additional surgical procedures (i.e. split crest, post-extraction, graft, osteo-condensation, transposition, small and big sinus lift techniques, p= 0.713) no statistically significant difference was detected. EDIERRE Implant System SpA (Genova, Italy) implants have a high SVR (97.7%) allowing more simple surgical procedures for oral rehabilitation of partially or totally edentulous jaws.

ARE WIDE DIAMETER IMPLANTS RELIABLE FOR JAW’S REHABILITATION? A RETROSPECTIVE STUDY ON 450 IMPLANTS.

The use of wide diameter implants (WDI) have had a great success, particularly in posterior jaws, because WDI can ensure an increased bone-implant contact, better withstanding occlusal forces and creating a wider platform for prosthesis. The aim of this study is to perform a study on 450 WDI to evaluate their survival rate. In the period between January 2008 and December 2013, 877 patients (498 females and 379 males) were operated at the BDD private Practice Clinic (Milan, Italy). The mean post-surgical follow-up was 30±17 months (max – min, 84 – 1). Four hundred and fifty WDI (EDIERRE Implant System SpA, Genoa, Italy) were included in the present study, 326 (72.4%) 4.5 mm and 124 (27.6%) 5 mm. All patients underwent the same surgical protocol and agreed to participate in a post-operative check-up program. SPSS program was used for statistical analysis. Survival rate (SVR) was 97.3% since only 12 fixtures were lost from a total of 450 implants. Cross-tabulation between failures and immediate loading had a statistically significant value (p= 0.009) in respect to delayed loading. There were 8 failures out of 128 immediate loaded implants in respect to 4 failures out of 315 delayed loaded fixtures. WDI are reliable devices for oral rehabilitation with high SVR.