Evaluation of the paraskeletal clamps system [Mennen plate] in treatment of mandibular fractures

In this study, we used the relatively recent Paraskeletal clamp system [Mennen plate] to evaluate its effectiveness in the treatment of mandibular fractures. This study was conducted on eight patients with mandibular fractures selected from the out patient clinic, Oral Surgery Department, Faculty of Oral and Dental Medicine, Cairo University. Patient sample consisted of six males and two females, four patients were children below the age of 11 years, while the other four were edentulous above the age of 58. Each patient was thoroughly examined both clinically and radiographically. Data collected from each patient were recorded in a special examination chart. Under general anesthesia, the fracture was exposed using a submandibular approach. The fractured segments were reduced and fixed using micro-5 Mennen plates. All patients were followed up both clinically and radiographically for six months postoperatively. Results obtained from this study showed uneventful healing of all patients with no cases of non-union, bony infection or osteomyelitis as proven both clinically and radiographically. All the patients presented normal functioning occlusion and facial symmetry. No bony step deformities were detected

Comparative study of meniscus replacement using antogenous auricular cartilage versus zenoderm

Twelve adult mongrel dogs were divided into two groups and were used in this study; to compare and to evaluate histologically in 3 months period; unilateral replacement of the dogs meniscus of temporomandibular joint with either autogenous cartilage of their external ears or with Zenoderm heterogenous graft. Autogenous cartilage of the dogs ear was progressively replaced by fibrous tissue and its attachment to the lateral pterygoid muscle was started at the third month postoperatively. On the other hand, Zenoderm was replaced by vascular fibrous tissue and begun to attach to the lateral pterygoid muscle from the first month postoperatively and showed also good functional adaptation to the bony surfaces. In both grafts there were no changes of the bone architecture

Modified lingual split technique versus conventional buccal technique in odontectomy of impacted mandibular third molars

This study was conducted to compare two different techniques used in odontectomy of impacted mandibular third molar; the modified lingual split technique and the conventional buccal technique as regarding the duration of surgery as well as the incidence of postoperative sequelae such as pain, edema, and trismus. This study was carried out on thirty adult male patients having class II, position B mesioangular impacted mandibular third molar scheduled for removal, the cases were divided into two equal groups, group one using the conventional buccal technique and group two using the modified lingual split technique. Pain was categorized into a three grade scale according to the dose of the analgesic taken by the patients postoperatively. The degree of trismus was calculated by measuring the interincisal distance when the mouth was opened at a maximum using a graduated caliper both preoperatively and postoperatively. Edema was measured linearly using a tape between different predetermined facial anatomical landmarks in different planes. All measurements were carried out immediately before surgery and after one, two and seven days postoperatively. The collected data were tabulated and were statistically analyzed. There was a significant difference between the two techniques as regards the duration of surgery in favor of the modified lingual split technique, with a mean of 36.3 minutes, in group two against a mean of 54.3 minutes in group I. As regards pain there was no significant difference in the first and the second postoperative days, while there was a significant difference in favor of the modified lingual split bone technique in the seventh postoperative day. Trismus and edema were comparable in both groups

Carcinogenesis of mouse submandibular salivary gland using DMBA implant

Carcinogenesis of 35 ddy male mice subtmandibular salivary glands were attempted; using implants of a 1 mg [2 mm] prepared pellets of the potent chemical carcinogen 9, 10-dimethyl-1, 2-benzanthracene [DMBA] dry powder without a vehicle or carrier. This method appeared to be easy, fast and effective. Within a period ranging from 7-14 weeks; twenty animals developed epidermoid carcinoma [two of them developed squamous cell carcinoma of covering skin as well], and two animals developed mixed tumors [pleomorphic adenoma like tumor] but neither adenocytic carcinoma nor sarcoma were found, the results were adequacy discussed