Oral and Maxillofacial Surger

179 words) Purpose: To evaluate the risk factors associated with the survival rate of the dental implants Material and Methods: This retrospective study evaluated the survival rate of 940 implants placed at the Dentistry Faculty, . The potential risk factors associated with the survival rate of the implants were investigated. Results: Fifteen (1.5%) of the 940 implants failed during the follow-up period. Smoking did not affect the survival rate of the implants (logrank, 1.5; p = 0.219). The survival rate of the implants placed in the maxilla was lower than that of implants placed in the mandible (logrank, 4.81; p = 0.028). The 5-year survival rate of the dental implants was 98.5%. Conclusion: There are still conflicting results about the risk factors associated with the survival rate of the implants. According to the results of the present study it is concluded that only the location of the implants is associated with the survival rates of the implants. All implant systems showed high survival rates.

Odontogenic cysts are slow growing lesions which are formed by epithelium. They may reach to a substantial size without symptoms for a long time. Radicular cysts' (RCs) and odontogenic keratocysts' (OKCs) are common odontogenic cysts of jaws. The main purpose of this study is to evaluate if anaerobic bacteria play a role in the pathogenesis of the RCs and OKCs fluids by polymerase chain reaction (PCR). Odontogenic cyst fluid samples with a history of infection were collected from a total of 28 odontogenic cysts consisting of 16 samples of OKCs and 12 samples of RCs. Anaerobic bacteria detection were performed by PCR based on bacterial 16S rRNA genes. Porphyromonas gingivalis existed more frequently compared to the other bacteria, in all samples (39.2%). Following this, F. nucleatum (32.1%), Provetella intermedia and Campylobacter rectus ( 25.5%), Treponema denticola (25%), Provetella nigrescens and Tannerella forsythia (17.8%), Dialister pneumosintes (14.2%), Filifactor alocis (10.7%), Porphyromonas endodontalis and Provetella pallens (7.1%) were seen. The 58.3% of the Fusobacterium nucleatum positive cyst fluids were in the RCs group. In D. pneumosintes positive cysts liquid samples, C. rectus was found to be positive (p=0.025). The same correlation was observed between F. alocis and C. rectus (p= 0.003). On the other hand, in F. alocis positive cysts liquid samples, F. nucleatum also was found to be positive (p=0.026). Odontogenic cysts fluid contained numerous anaerobic bacteria of various types, thus suggesting that oral bacteria may cause symptoms in odontogenic cyst fluids. Further studies are needed to assess the role of these bacteria in the pathogenesis of odontogenic cysts.

Polymethylmethacrylate bone cements have been widely used in orthopedic surgery as well as in maxillofacial area. Despite the advantages, it is well known that acrylic bone cements may cause bone or soft tissue necrosis because of the properties of its components and polymerization. This clinical report presents an extensive necrosis of the mandible after the use of the acrylic bone cement to fill the cyst cavity. The purpose of this article was to alert the clinicians about the complications that may occur after the use of the polymethylmethacrylate-based bone cements.

The dentigerous cyst is a developmental odontogenic cyst, accounting for 10% of all cysts of the jaws. The treatment options are decompression, marsupialization, or enucleation regarding the features of the lesions. In this article, a case of a 17-year-old adolescent girl having a large mandibular dentigerous cyst associated with an unerupted third molar is presented. The treatment is composed of decompression for 6 months and enucleation.

Intraosseous lipoma is a benign tumor of the bone. It is mostly seen in the metaphyses of the long bones and calcaneus. There are few documented cases of intraosseous lipomas in the jaw. Clinically, the lesion is usually silent and radiologically it appears as a radiolucent area rarely including some radio-opacities. Diagnosis is based on clinical, radiological and histopathological features. Surgical removal of the lesion is the recommended treatment. The authors report a rare case of an intraosseous mandibular lipoma in a 45-year-old female, and review previously documented cases in the English literature. The histopathological and radiological features of the lesion are emphasized.

Foreign bodies may be displaced into the maxillary sinus as a result of trauma or during dental interventions. They commonly cause chronic sinusitis and/or fungal infections. This paper presents the case of a foreign body lodged in the right maxillary sinus ostium of a 31-year-old female patient. The foreign body was observed incidentally during radiological examination. After careful clinical and radiological examination, it was concluded that the foreign body was a piece of amalgam displaced into the maxillary sinus during a traumatic extraction. It is an uncommon finding to observe an asymptomatic dental foreign body in a position so close to the natural ostium of the maxillary sinus for so many years without any oro-antral fistula formation and/or sinusitis attacks. We describe the non-surgical approach to the case and the need for surgical management will be questioned. The importance of consultation between otolaryngologists and oral and maxillofacial surgeons will also be emphasised.