## 3 Results
### Type of Failure
\begin{table}
\begin{tabular}{c c c c c} \hline \hline \multicolumn{5}{c}{**Surgery Characteristics**} \\ \hline \multirow{2}{*}{-} & **No. Patients/Total** & \multirow{2}{*}{**\%**} & **No. Im-** & \multirow{2}{*}{**\%**} \\  & **to patients/Total** & & & \\ \hline Surgical periods & - & - & - & - \\ \hline Post-extraction implants & 30/192 & 15.63\% & 53/422 & 12.56\% \\ \hline Delayed implants & 162/192 & 84.38\% & 369/422 & 87.44\% \\ \hline Type of regeneration & - & - & - & - \\ \hline GBR & 32/192 & 16.67\% & - & - \\ \hline Bone expansion & 8/192 & 4.17\% & - & - \\ \hline Chin graft & 1/192 & 0.52\% & - & - \\ \hline Autologous graft & 1/192 & 0.52\% & - & - \\ \hline Cytoplasm & 1/192 & 0.52\% & - & - \\ \hline Unspecified & 6/192 & 3.13\% & - & - \\ \hline Sinus Lift & - & - & - & - \\ \hline Transcrastal & 4/192 & 2.08\% & - & - \\ \hline Simultaneous with lateral window & 14/192 & 7.29\% & - & - \\ \hline Delayed with lateral window & 2/192 & 1.04\% & - & - \\ \hline \multicolumn{5}{c}{Characteristics of the prosthetic rehabilitation} \\ \hline Load type & - & - & - & - \\ \hline
24 h immediate load & 17/192 & 8.85\% & 93/422 & 22.04\% \\ \hline Delayed load (2-3 months) & 9/192 & 4.69\% & 11/422 & 2.60\% \\ \hline Late load (6 months) & 147/192 & 76.56\% & 269/422 & 63.74\% \\ \hline Explanation & 9/192 & 4.69\% & 9/422 & 2.13\% \\ \hline No load recorded & 18/192 & 9.38\% & 40/422 & 9.48\% \\ \hline Type of prosthesis & - & - & - & - \\ \hline Fixed & 162/192 & 84.38\% & 338/422 & 80.09\% \\ \hline Removable & 10/192 & 5.21\% & 35/422 & 8.29\% \\ \hline \hline \end{tabular}
\end{table} 
Table 4: Characteristics of the surgery and prosthetic rehabilitation. GBR: guided bone regeneration. \begin{table}
\begin{tabular}{c c c c} \hline \hline \multicolumn{2}{c}{**Demographics and Medical**} & **Failure** & **No Failure** & \multirow{2}{*}{**\(p\)-Value**} \\  & **n = (\%)** & & **n = (\%)** & \\ \hline Gender & 6 (6.1\%) & 92 (93.9\%) & \multirow{2}{*}{0.337} \\ Male & 3 (3.2\%) & 93 (96.8\%) & \\ \hline Age & 9 (57.44 \(\pm\) 14.8) & 183 (53.58 \(\pm\) 13.4) & 0.403 \\ \hline Parafunctional habits & 1 (3.6\%) & 27 (96.4\%) & 0.762 \\ \hline Autoimmune disease & 0 (0\%) & 8 (100\%) & 0.982 \\ \hline Osteoporosis & 0 (0\%) & 1 (100\%) & 0.699 \\ \hline Bisphosphonates & 0 (0\%) & 4 (100\%) & 0.904 \\ \hline Diabetes & \multirow{2}{*}{1 (8.3\%)} & \multirow{2}{*}{11 (91.7\%)} & \multirow{2}{*}{0.915} \\ Type 2 & & & & \\ \hline \hline \end{tabular}
\end{table} 
Table 5: Association between medical characteristics and implant failure. The 373 implants with a prosthetic load record (excluding the 4 implants explanted after 199, placing the prosthesis) are currently functional. \begin{table}
\begin{tabular}{l c c c} \hline \hline
**Implant Variables** & **Failure n = (\%)** & **No Failure n = (\%)** & \(p\)**-Value** \\ \hline Location & & & \\  Maxilla & 6 (2.7\%) & 219 (97.3\%) & 0.417 \\  Jaw & 3 (1.5\%) & 194 (98.5\%) & \\  Location & & & \\  Anterior & 7 (4\%) & 169 (96\%) & 0.014 * \\  Posterior & 2 (0.8\%) & 244 (99.2\%) & \\  Regeneration & 5 (8.5\%) & 54 (91.5\%) & 0.098 \\  Type of failure: & & & \\  Early & 6 (66.7\%) & 0 (0\%) & 0.0001 * \\  Late & 3 (33.3\%) & 0 (0\%) & \\  Type of failure related to implant position & & & \\  Anterior/early & 6 (3.4\%) & 169 (96\%) & \\  Anterior/late & 1 (0.6\%) & & \\  Posterior/early & 0 (0\%) & & \\  Posterior/late & 2 (0,8\%) & & \\ \hline \end{tabular}
\end{table} 
Table 6: Association between implant location, regeneration, and type of implant failure.