This study was carried out to evaluate the prevalence of sinus mucosa perforation occurred during maxillary sinus mucosa elevation surgery, its relation to objective conditions and to the causative medical history, and its influence on postoperative sinusitis, as well. One hundred and forty-six sinus lift procedures have been evaluated in 118 patients. The prevalence of the sinus mucosa perforation was evaluated and subdivided into four groups according to its size and way of treatment. No relation was observed between the perforation and the presence of sinus septa, smoking, radiographic thickening and cyst-like lesions of the maxillary sinus, and previous sinus allergy (P<0.05). Despite of high prevalence of the perforation of the mucosa (56.16%), no signs of bone graft infection or maxillary sinusitis were noted in any of our patient.

The purpose of this study was to determine the accuracy of panoramic radiography in identification of maxillary sinus septa. Out of 68 sinuses were radiographically examined using both panoramic and computerized tomographic radiographs (CT scan). Using CT scan, 24 (35.9 %) out of 68 cases maxillae showed at least one septum, 22 sinuses (32.3 %) showed one septum, whereas two sinuses (2.9 %) exhibited two septa. Panoramic radiograph led to a false diagnosis regarding the presence or absence of sinus septa in 18 of 68 sinuses (26.5 %). On the other hand, they gave negative diagnosis of sinus septa in 12 of 24 septa (50 %). There was fully agreement between the two methods (positive septa) only in 12 of 24 septa (50 %). We cannot depend on panoramic radiograph for the detection of sinus septa because it can lead to false or negative results.

The objective of this clinical study was to determine the predictability of endosseous implant placed in a maxillary sinus augmented with deproteinized bovine bone (Bio-Oss®). A total of 185 implants (109 titanium and 76 hydroxyapatite- coated) were placed in 77 patients representing 92 sinuses either a one- or two-stage surgical technique. A mixture of venous patient’s blood and Bio-Oss® was used alone within 20 sinuses (Group 1), or in combination with autogenous bone within 72 sinuses (Group 2). Thirty-nine implants were placed in Group 1 and 147 implants were inserted in Group 2. The grafted sinuses were evaluated clinically and radiographically at second stage surgery. According to certain criteria, of the implants placed, only two titanium implants (1.08 %) failed with 98.91 % implant survival. There was no statistically variable difference for the use of hydroxyapatite-coated or titanium implants. The two failed implants were from Group 2. No clinical benefit has been achieved from the combination with autogenous bone (P<0.05). All the grafted sinuses were sufficient to place dental implants of at least 12 mm length (100 % graft success). The results of this short-term study support the hypothesis that Bio-Oss® can be a suitable material for sinus augmentation.

The objective of this study was to classify the different routes of the bifid mandibular canals (BMCs) on 2400 panoramic radiographs in a Syrian population. BMCs were identified, drawn and classified according to the classification of Langlais et al. Classification des canaux mandibulaires bifides dans la population syrienne à l'aide de radiographies panoramiques RESUME L'objectif de la présente étude était de classer les différents trajets des canaux mandibulaires bifides sur 2400 radiographies panoramiques dans une population de Syriens. Des canaux mandibulaires bifides ont été identifiés, dessinés puis classés selon la classification de Langlais et al. Un canal mandibulaire bifide a été observé dans 41 cas (0,98 %). Au total, 15 canaux (36,6 %) ont été attribués à la Classe I, 6 canaux (14,6 %) à la Classe II, 8 canaux à la Classe III (19,5 %) et 12 canaux (29,3 %) à la Classe IV. Aucune association statistiquement significative n'a été observée entre la classe du canal mandibulaire bifide et le sexe ou la prévalence du côté affecté de la mâchoire. Les implications cliniques des classes de canaux mandibulaires bifides font l'objet de discussions et un algorithme est suggéré pour guider les cliniciens dans leur évaluation clinique.‫املتوسط‬ ‫لرشق‬ ‫الصحية‬ ‫املجلة‬ ‫عرش‬ ‫التاسع‬ ‫املجلد‬ 3 ‫اإلضايف‬ ‫العدد‬ S179

No abstract

This study was undertaken to compare implant survival after one- or two-stage sinus augmentation. Ninety-two maxillary sinuses in 77 patients were augmented with deproteinized bovine bone (Bio-Oss®). These sinuses were subdivided into two groups: Group 1 (n = 49) was operated on with a one-stage procedure, and Group 2 (n = 43) with a twostage operation. A hundred and eighty-five implants were inserted in these augmented sinuses. Clinical and radiographical evaluations were performed and recorded according to certain criteria. The follow-up period was ranging from 16 to 44 months. Out of the implants inserted using the one-stage procedure, all survived. Two implants failed in the two-stage procedure group (98.91 % implant survival). This study showed that no statistically significance was observed between the two surgical techniques (P<0.05). Therefore, the authors concluded the type of surgical procedure (one- or two-stage) has no effect on implant survival.

Attempts of establishing vaccines against cancers are in process of becoming authentic in future due to its successful clinical trials. But, there are problems in assessing the prognosis of the diseases due to the weakness and specificity of tumor associated antigens in stimulating an effective immune response. A surplus combination of immunotherapeutic cancer strategies and appropriate checkpoint inhibitors, becomes a promising area for successful cancer disease control. This article summarizes the understanding of tumor antigens (specific or associated) in head and neck squamous cell carcinoma, which allow some space with a positive and hopeful view of the future.

No abstract