## 3 Results
### Type of Surgery and Rehabilitation  
Surgery and prosthetic rehabilitation are described in (Table 4). A total of 54 implants were placed post-extraction, 22 of which had an immediate load. A total of 50 patients received a regeneration procedure in combination with placing implants. A total of 64% of cases were regenerated with a xenograft and collagen membrane (Bio-oss(r) Bio-guide(r), Inibsa Dental S.L.U, Llica de Vall-Barcelona, Spain), without specifying the type of regeneration. A total of 20 sinus lifts were performed; implant placement was delayed for 2 of them, with the other 18 placed simultaneously (14 with a lateral window and 4 with a transalveolar technique). A total of 8.5% (N = 5) of the total percentage of patients treated with dental implants and bone regeneration failed, which was not a statistically significant value, with \(p\) = 0.098.  
Figure 1: Implant distribution by gender and age range.  
\begin{table}
\begin{tabular}{c c c c} \hline \hline \multirow{2}{*}{**Variables**} & \multicolumn{2}{c}{**N Patients/N of**} & \multirow{2}{*}{**Percentage**} \\  & & **OII** & \\ \hline Gender & - & & \\ \hline - & Male & 98/249 & 51.04\%/59\% \\ \hline - & Female & 94/173 & 48.96\%/41\% \\ \hline Age (\(\overline{\text{X}}\pm\text{SD}\)) & - & 54.5 \(\pm\) 13 & - \\ \hline Autoimmune diseases & - & - \\ \hline - & Fibromyalgiagia & 4 & 2.09 \\ \hline - & Lichen Planus & 1 & 0.52 \\ \hline \multicolumn{2}{c}{Sporiasis} & 2 & 1.04 \\ \hline HIV & 1 & 0.52 \\ \hline Osteoporosis & 1 & 0.52 \\ \hline Bisphosphonates & 4 & 2.09 \\ \hline Diabetes & & \\ \hline Type 1 & 1 & 0.52 \\ \hline Type 2 & 12 & 6.28 \\ \hline Gestational & 1 & 0.52 \\ \hline Cardiovascular diseases & & \\ \hline Hypertension & 47 & 24.6 \\ \hline Arrhythmias & 9 & 4.71 \\ \hline Chest angina & 5 & 2.61 \\ \hline Heart failure & 2 & 1.04 \\ \hline Ischemic heart disease & 1 & 0.52 \\ \hline Arterial occlusive disease & 1 & 0.52 \\ \hline Hypotension & 1 & 0.52 \\ \hline Aneurysm & 1 & 0.52 \\ \hline Cerebrovascular accident & 1 & 0.52 \\ \hline Stroke & 1 & 0.52 \\ \hline Myocardial infarction & 2 & 1.04 \\ \hline Valvulopathy & 1 & 0.52 \\ \hline Parafunctional habits & & \\ \hline Bruxism & 27 & 14.13 \\ \hline Periodontal disease & 68 & 35.6 \\ \hline Smoking habit & & \\ \hline \multicolumn{2}{c}{\textless{}10 cigarettes a day} & 19 & 9.94 \\ \hline \multicolumn{2}{c}{\textgreater{}10 cigarettes a day} & 29 & 15.18 \\ \hline \hline \end{tabular}
\end{table}
Table 2: Demographic data and medical histories of the sample. N: number; OII: number of implants. HIV: human immunodeficiency virus; NSAIDs: nonsteroidal anti-inflammatory.  
When it comes to results based on the time of loading, 93 implants (22.04%) were rehabilitated immediately (24 h) with provisional prostheses. Only 11 implants (2,60%) were rehabilitated with an early load within a period of 2 to 3 months, and 269 (63.74%) implants had delayed loading (\(\geq\)6 months), which was the longest time used to subject a load to the implant. There was no prosthetic load record for 18 patients, totaling 40 implants (9.48%). A fixed prosthesis was used most in 338 implants (80.09%), while the removable prosthesis was only used in 35 mandible implants (8.29%).