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26. Bone augmentation using demineralized bone and porous polysulfone
Fouad Salama,
Department of Preventive Dental Sciences, College of Dentistry, King Saud University, P.O. Box 60169, Riyadh 11545, Saudi Arabia.
We have previously shown that porous polysulfone (PPSF) is a suitable non-resorbable material that accommodates bone and soft tissue formation when used for chin augmentation. Demineralized bone powder was found to induce both cartilage and bone formation when implanted in subcutaneous tissue or in muscle pouch of rats and monkeys. The purpose of this study was to test the soft tissue and bone response to the implantation of PPSF with and without DBP for ridge augmentation in Macaca Fascicularis. The mandibular molar teeth were extracted in five adult female monkeys, followed by massive alveolectomy. Five to eight months later, PPSF + DBP was inserted on the left side, while PPSF alone was inserted on the right side. The animals, were killed 42, 60 and 90 days following implantation. Specimens were processed for light nicroscopy using decalcified and undecalcified sections, tetracycline labelling, and histomorphometric measurement of new bone. The 42-day speciments of the PPSF + DBP and PPSF revealed penetration of fibrous tissue rich in fibroblasts and blood vessels into the pores of the PPSF. At 60 and 90 days, the PPSF side showed organized fibrous tissue, but bone grew only for a short distance into the implant. In contrast, the PPSF + DBP side showed large amounts of bone formation, and bone almost covered the implant. Fluorescence of tetracycline was noticed within the pores of the polysulfone and at the bone-polysulfone interface. The qualitative results were confirmed by histomorphometric examination. These results strongly suggest that PPSF + DBP can be used for clinical trials for bone augmentation of the facial skeleton and in the oral cavity. Supported by Amideast Co. Grant. # 10-12-02-1122-61.
Saudi Dental Journal 1992;4(SI)-Abstr.26:p27.
27. Tongue cancer among "shamma" dippers: prevalence and clinico-pathologic characteristics
Berge Atam, Gamil Salem,
Dental Department, King Fahad Central Hospital, P. O. Box 310, Gizan, Saudi Arabia.
A retrospective study of 247 cases of oral cancer seen in the Dental Department, King Fahd Central Hospital, Gizan between 1984-September 1991 revealed 71 cases of tongue cancer, with a prevalence rate of 28.7%. Two cases were the result of malignant transformation of lichen planus, while the other 69 cases developed in "Shamma" dippers.
The location of the tongue lesion was almost always the site of frequent traumatization by the sharp edges of teeth that have been abraded through the long continued use of Shamma. Contrary to Shamma dippers carcinoma, in other locations of the mouth studied earlier, tongue cancer in this group of population was characterized by being highly infiltrating, and was usually associated with moderate (Grade II) differentiation and higher lymph node involvement.
The findings of this study indicate that trauma from the sharp edges of teeth is an important factor in the development of tongue cancer among "Shamma" dippers.
Saudi Dental Journal 1992;4(SI)-Abstr.27:p28.
28. Pattern of oral pathological conditions in children: the college of dentistry, ksu experience
Maan Al-Gailani. H.A. Mosadomi, N.O. Nartey,
Department of Biomedical Dental Sciences, College of Dentistry, King Saud University, P.O. Box 60169, Riyadh 11545, Saudi Arabia.
Specimen from children, 14 years of age and below, submitted for histological examination to the Oral Pathology Lab, College of Dentistry, King Saud University between 1985 to 1990 were reviewed. The total number of these were 109 representing 8.5% of the total number of specimen received during that same period. Inflammatory conditions including periapical granuloma, gingivitis, periodontic and other accounted for 34 cases (31.2%) being the largest group of conditions. Cysts, mostly odontogenic, totalled 21 cases (19.3%). Fourteen neoplastic lesions were recorded (12.8%), ten (9.2%) of which were benign and four (3.6%) were malignant. Tumor-like lesions including fibrosseous lesions, histiocytosis and giant cell granulomas accounted for 15 cases (13.8%). No pathology could be found in 18 specimen (16.5%). TMJ and other less common lesions accounted for the rest. Male:Female ratio was 1.2:2.
Saudi Dental Journal 1992;4(SI)-Abstr.28:p29.
29. Tumors, cyst, cyst-like and allied lesions of the jaws and oral mucosa in riyadh, k.s.a.
H. Adeyemi Mosadomi, M. Al-Cailani, N.O. Nartey, N. Al-Saif,
Department of Biomedical Dental Sciences, College of Dentistry, King Saud University, P. O. Box 60169, Riyadh 11545, Saudi Arabia.
Reports on jaw tumors and mucosal lesions in Saudi Arabia are scattered and varied (ElAkkad et al 1980, Amer 1982, Mani 1985, Ezzatet al 1987, Dosari 1987, Salem 1990). The oral pathology records in the Department of Biomedical Dental Sciences of King Saud University College of Dentistry offer a more comprehensive and systemic data source to describe the pattern of jaw and mucosal lesions seen in Saudi Arabia. A 1985-1990 survey revealed that of 1283 recorded biopsies, cysts and cyst-like lesions accounted for 20.3%, mucous membrane lesions 4.8%, malignant tumors 4.7%, odontogenic tumors 3.2%, fibrosseous lesions 2.4%. Benign tumors, hyperplasia and granuloma accounted for 64.6%. Data will be presented to show similarity and dissimilarity with comparable figures around the world.
A sustained effort in proper documentation as presently being done in the department will, in future, offer the opportunity to determine prevalence figures for these jaw and mucosal lesions in a representative Saudi population from Riyadh.
Saudi Dental Journal 1992;4(SI)-Abstr.29:p30.
30. Split rib bundle graft in mandibular reconstruction
Mohamed M. El-Sheikh,
Alexandria University, 8 GamalEdin Yasin, Ramlah Station, Alexandria, Egypt.
Mandibular reconstruction can be done by various techniques. In the last three years, thirty-five patients with various mandibular defects were rehabilitated by using the split rib bundle graft. This method proved to be very practical for reconstruction of various defects, varying from hemimandible, to include body discontinuity and chin. The success rate was over 90%. Some technical key points are mentioned in details together with the advantages, disadvantages, and complications.
Saudi Dental Journal 1992;4(SI)-Abstr.30:p31.
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