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At least 1,171 records · Page 65Linked to original sources
PubMed1975

Periodontosis in sibs.

Periodontosis is an idiopathic degeneration of the periodontium which results in migration and loss of teeth. The disease begins in the regions of the incisors and first molars. Late in the disease, other areas of the dental arches may be involved. The gingivae are not initially inflamed, and there are no associated systemic abnormalities. Local irritants cannot account for the marked alveolar destruction which leads to the tooth loss. Several heritable syndromes and periodontitis also may be associated with alveolar bone destruction. Periodontosis can be differentiated each of these on the basis of negative laboratory tests, lack of associated anomalies, distinctive pattern of bone loss and timing of onset of gingival inflammation. A family in which periodontosis was present in three of six sibs and in which ichthyosis was segregating independently of periodontosis is reported.

Adolescent↗
PubMed1975

Radiologic features of ameloblastoma in Nigerians.

Radiology plays an important role in preoperative diagnosis and postoperative assessment of ameloblastoma. The postoperative appearances, including complications as well as radiologic features of recurrence, are discussed. The differential diagnosis of the unilocular lesion is difficult, and particularly noteworthy are the five cases of histologically proven adamantinoma whose radiographic appearance closely mimicked dentigerous cyst.

Adolescent↗
PubMed1984

Recurrent histiocytosis X with mandibular lesions.

A 19-year old male patient suffered a recurrence of histiocytosis X after 11 years of apparent remission. Radiographic lesions were found in the mandible. Loose and painful teeth were present. Low-dose radiation to the mandible and oral chemotherapy were followed with regression of bony lesions. Reports of incidence, treatment methods, and recurrences are reviewed.

Adult↗
PubMed1990

Solid adenoid cystic carcinoma of the maxilla.

Seven cases of solid variant of adenoid cystic carcinoma of the maxilla are reported. Clinical and radiographic characteristics suggest origin within the maxillary alveolar bone. Swelling was minimal and disproportionate to the extensive, diffuse bone destruction universally present. Histologic features were typical of this neoplasm occurring in other sites and consisted of diffusely infiltrating islands of small, closely packed monomorphous cells with sparse cytoplasm, indistinct borders, and small hyperchromatic nuclei. Four of five patients with follow-up data died of their disease. This confirms the lethality of the solid variant. Rationale is presented for considering these malignancies to be of primary intraosseous origin.

Adult↗
PubMed1992

Maxillary osteomyelitis and spontaneous tooth exfoliation after herpes zoster.

Reports of spontaneous tooth exfoliation and osteonecrosis trigeminal herpes zoster are extremely rare and have been sporadic. This article reports a pertinent case of a 50-year-old man who exhibited prodromal odontalgia before the appearance of vesicular mucocutaneous lesions, together with severe destruction of the maxillary bone and exfoliation of multiple teeth. This patient was successfully treated using a unique closed nasal-vestibular drainage system for the ultimate control of maxillary bone viability. A review and analysis of the clinical aspects and the pathogenesis of herpes zoster and bone necrosis are discussed.

Cranial Nerve Diseases↗
PubMed1987

Burkitt's lymphoma in the mandible--a case report.

Burkitt's lymphoma is a tumour that most often affects the jaws, especially in endemic areas of Africa. In non-endemic areas, the jaws are affected in about 15-18% of cases. A case is presented which demonstrates the significance of jaw lesions in the disease. The history and pathogenesis of the disease also are discussed.

Burkitt Lymphoma↗
PubMed1996

Low force cementation.

OBJECTIVES: The marginal adaptation of full coverage restorations is adversely affected by the introduction of luting agents of various minimum film thicknesses during the cementation process. The increase in the marginal opening may have long-term detrimental effects on the health of both pulpal and periodontal tissues. The purpose of this study was to determine the effects of varying seating forces (2.5, 12.5, 25 N), venting, and cement types on post-cementation marginal elevation in cast crowns. MATERIALS: A standardized cement space of 40 microns was provided between a machined gold crown and a stainless steel die. An occlusal vent was placed that could be opened or closed. The post-cementation crown elevation was measured, following the use of two commercially available capsulated dental cements (Phosphacap, and Ketac-cem Applicap). RESULTS: The results indicate that only the combination of Ketac-Cem Applicap and crown venting produced post-cementation crown elevation of less than 20 microns when 12.5 N seating force was used. Higher forces (25 N) and venting were required for comparable seating when using Phosphacap (19 microns). CONCLUSIONS: The amount of force required to allow maximum seating of cast crowns appears to be cement specific, and is reduced by effective venting procedures.

Cementation↗
PubMed1992

The effect of corticosteroid-induced osteoporosis on orthodontic tooth movement.

The purpose of this research was to study the effect of corticosteroid-induced osteoporosis on orthodontic tooth movement and relapse. Sixteen 3-month-old New Zealand white rabbits were divided into four equal groups, two treatment and two control. All treatment rabbits were administered daily injections of 15 mg/kg cortisone acetate for 4 days before and during the experimental period. An orthodontic appliance delivering a mesial force of 4 ounces was placed on the maxillary left first molar of all animals. For all groups, measurements of active tooth movement were made after 4, 7, 11, and 14 days. For two of the groups, appliances were removed on day 14, and additional measurements of relapse were made through day 21. With the use of radiodensitometric readings of the humerus bone and histology of the maxilla, osteoporosis was demonstrated in the treatment animals. Mean incremental and cumulative active tooth movement was three to four times greater (p < 0.0001) in the treatment rabbits than in the controls. The treatment group in which relapse was measured demonstrated 100% relapse on day 18, whereas the control group relapsed at a much lesser rate through day 21 and never achieved 100% relapse. Histologic findings appeared to support tooth movement results. In conclusion, the results of this study indicate that rabbits subjected to corticosteroid-induced osteoporosis undergo significantly more rapid orthodontic tooth movement and subsequent relapse than control animals.

Absorptiometry, Photon↗
PubMed2004

Relationship between the tooth eruption and regional blood flow in angiotensin II-induced hypertensive rats.

OBJECTIVE: The mechanism of action of vasoactive drugs on tooth movement is unknown. The purpose of the present study was to measure simultaneously the axial movement of the mandibular incisor, regional blood flow at the base of the incisor, and systemic arterial blood pressure in angiotensin II-induced hypertensive rats to determine the possible cause of tooth displacement. DESIGN: The measurements were made under artificial respiration with halothane anaesthesia. In the experimental animals, 2.5 microg of angiotensin II in 1 ml of Ringer's solution was infused at 0.83 ml/h for 12 h from the femoral vein. In the control animals, only Ringer's solution was infused. RESULTS: Angiotensin II caused an increase of the mean arterial blood pressure from 86 to 119 mm Hg, and decreases of the eruption rate from 667 to 494 microm/24 h and the regional blood flow from 262 to 214 mV. There was a positive correlation between the eruption rate and regional blood flow, and a negative correlation between the blood pressure and regional blood flow. CONCLUSION: These results suggest that angiotensin II caused constriction of the peripheral vascular smooth muscle resulting in an increase of arterial blood pressure and a decrease of regional blood flow, followed by a decrease of fluid volume and then a reduction of either the pressure within the socket or of the eruptive force. We assume that the regional vascular pressure within the socket plays an important role in determining the position of the rat incisor.

Angiotensin II↗
PubMed2005

Transverse maxillary distraction with a bone-anchored appliance: dento-periodontal effects and clinical and radiological results.

In 29 adult patients presenting with maxillary deficiency, a bone-anchored palatal distractor (Surgi-Tec NV, Brugge, Belgium) was applied after osteotomy of the anterolateral walls of the maxillary sinuses, midpalatal suture, and, eventually, separation of the pterygomaxillary sutures. Expansion proceeded at a rate of 0.33-0.66 mm per day and the device was retained for 4-6 months for consolidation. Active orthodontic therapy was started after 8-10 weeks. The increment of arch width and the perimeter were evaluated using dental casts. Tooth thermal sensitivity and the periodontal side effects of treatment were monitored clinically after distraction, at device removal, and after 1 year. Bone healing was also investigated during the procedure using conventional radiological techniques. This experience confirms that transverse maxillary distraction is an effective technique in adult patients, leading to the formation of new bone. There were no noticeable intraoperative complications, but postsurgical periodontal side effects were documented. The procedure offers advantages over traditional teeth-borne appliances in terms of rapidity of treatment and the absence of mechanical forces acting on the teeth. Further evaluation is required to assess the long-term stability and periodontal consequences of this technique.

Adult↗