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At least 613 records · Page 34Linked to original sources
PubMed2004

Nasal displacement of a tooth root in a dog.

A ten-year-old miniature Dachshund dog was presented for chronic paroxysmal sneezing and unilateral nasal discharge. Extraction of the maxillary right fourth premolar tooth had been performed 2-weeks prior to the onset of clinical signs. Multiple diagnostic modalities were used to confirm the diagnosis and determine that the etiology was a nasally displaced mesiopalatal tooth root. A limited lateral rhinotomy was performed to remove the root. Postoperative examination 1-month following surgery indicated resolution of the clinical signs and uncomplicated healing of the surgery site. Oral examination indicated normal healing of the surgery site with continued absence of clinical signs 6-months after treatment.

Animals↗
PubMed2005

Early responses of periodontal ligament cells to mechanical stimulus in vivo.

Previous studies have indicated that human periodontal ligament cells undergo osteoblastic differentiation via the ERK pathway under mechanical stress in vitro. This study aimed to verify this principle in vivo. The right upper first molars of 25 anesthetized rats were loaded with constant forces of 0.1 N for up to 8 hrs. The untreated contralateral side served as a control. Paraffin-embedded sections were analyzed by immunohistochemistry for proliferating cell nuclear antigen (PCNA), runt-related transcription factor 2 (Runx2/Cbfa1), and phosphorylated extracellular signal-regulated kinases 1/2 (pERK1/2). In selected areas under tension, the proportions of Runx2-positive and pERK1/2-positive cells increased within 8 hrs of loading, whereas these proportions in selected areas under pressure were significantly lower than those in control teeth. Moreover, there were no significant changes in the number of PCNA-positive cells. Thus, mechanical stimulus up-regulates Runx2, and this regulation may be achieved via the ERK pathway.

Animals↗
PubMed2006

Impact of endodontic treatments on the rigidity of the root.

The destabilizing effect of endodontic treatment upon teeth is still controversial. The purpose of this study was to investigate the effects of different steps of endodontic treatments upon the rigidity of teeth. Extracted untreated central maxillary anterior teeth were loaded (3.75 N), and deformations of the root were assessed by Speckle pattern interferometry. The following treatments (with subsequent determination of deformability) were conducted sequentially: access preparation, manual instrumentation (Kerr files ISO-40, ISO-60, ISO-80, ISO-110), and tapered and parallel-sided post preparation. It was found that the teeth were increasingly destabilized by any treatment. While the increased deformability was not significant with the manual enlargement (p > 0.05), we found a significant destabilization after access preparation and post preparation (p < 0.05). A corresponding difference was found after conversion of the post preparation from tapered to parallel-sided (p < 0.05). Both substance loss and modifications of the natural root canal geometry play an important role in tooth rigidity.

Bicuspid↗
PubMed2006

Influence of alveolar support on stress in periodontal structures.

The influence of alveolar bone support on the functional capability of a tooth remains unclear. It was hypothesized that a reduction in alveolar support causes an increase of maximum stress in the periodontal structures. Mathematical models of the maxillary incisor to simulate in vivo tooth movement were constructed with periodontium of normal or reduced bone height, and normal or widened periodontal ligament (PDL) space. Under simulated bite force, the maximum tensile stress at the lingual cervical region in the PDL increased with bone height reduction, but decreased with PDL widening. The compressive stress at the cervical region in the cortical bone was no more than 22% of the yield strength of bone, and did not increase by the height reduction with widened PDL. The result suggests that the height reduction potentially causes mechanical damage to the PDL, but, of itself, is not likely to have a negative effect on the bone.

Alveolar Bone Loss↗
PubMed1982

Uprighting molars as an adjunct to restorative and periodontal treatment of adults.

The interrelationship between form, function and stomatologic health is unclear. However, tooth positions that prevent bacterial plaque removal may predispose towards periodontal disease. A frequent problem in adults is loss of posterior teeth with subsequent tip and drift of the molars. Occlusal trauma, if superimposed on gingival inflammation, can result in rapid tissue destruction. Therefore, an indication for orthodontic treatment is the restoration of normal axial inclination and tooth position so that bacterial plaque control may be effected. Simple orthodontic appliances may be used to restore the position of tipped molars. The benefits of orthodontic treatment, prior to the restoration of the posterior occlusion, are improvement in occlusal loading, improvement of periodontal health and simplification of prosthetic design and fabrication.

Adult↗
PubMed2003

Dental profile of patients with Gaucher disease.

BACKGROUND: This study was conducted to determine whether patients with Gaucher disease had significant dental pathology because of abnormal bone structure, pancytopenia, and coagulation abnormalities. METHODS: Each patient received a complete oral and periodontal examination in addition to a routine hematological evaluation. RESULTS: Gaucher patients had significantly fewer carious lesions than otherwise healthy carriers. Despite prevalence of anemia, there was no increase in gingival disease; despite the high incidence of thrombocytopenia, gingival bleeding was not noted; and despite radiological evidence of bone involvement, there was no greater incidence loss of teeth or clinical tooth mobility. CONCLUSIONS: These data represent the first survey of the oral health of a large cohort of patients with Gaucher disease. It is a pilot study of a unique population and the results of the investigation are indications for further research. Based on our findings, we recommend regular oral examinations with appropriate dental treatment for patients with Gaucher disease as for other individuals. Consultation between the dentist and physician, preferably one with experience with Gaucher disease, should be considered when surgical procedures are planned.

Journal Article↗
PubMed2004

Unusual combination of presenting features in multiple myeloma.

Initial oral signs of multiple myeloma may involve pain, paraesthesia, swelling, tooth mobility and radiolucency. A 62-year-old female patient presented with the chief complaint of numbness in the right lower jaw. Intraoral examination revealed no abnormalities and her history was non-contributory. A panoramic radiograph revealed an irregular, small radiopacity in the premolar region and small, multiple and diffuse osteolytic alterations in the mandible. Computed tomography revealed maxillary and mandibular cortical destruction. An incisional biopsy was performed. The histopathological diagnosis was plasma cell myeloma and further investigations lead to the diagnosis of multiple myeloma. Dysfunction of a nerve coursing through diseased bone is an ominous sign and may be an indication that a malignant process is present.

Bone Neoplasms↗
PubMed1981

Replantation of a mandibular molar: report of case.

A patient with an alveolar abscess, swelling, pain, and an extremely mobile tooth had had previous root canal treatment. Extraction was recommended but, with informed consent and the patient's desire to keep his tooth, intentional replantation was performed as a last resort. Matsura's method of canal preparation, which results in a large area of amalgam on the root surface, was used. This method did not impair healing. According to Bjorvatn and Massler, 11 application of 1% SNF2 to the root surfaces for five minutes reduces root resorption. This technique was not used in this case. Clinical and radiographic observation for almost four years substantiate this as a successful case.

Adult↗
PubMed1989

Gingival response to nicotine polacrilex.

Nicotine polacrilex (Nicorette) is the only medication approved by the Food and Drug Administration for tobacco dependency treatment. It is available only by prescription. This study sought to determine whether this medication produced any adverse gingival effects. Thirty-one patients (91%) used the nicotine polacrilex for at least 1 month and 20 (59%) for 3 months or more. Five (15%) developed small (less than 2 mm), painless, clear, nonhemorrhagic vesicles which resolved immediately when patients were reinstructed to position the medication in different sites in the mouth. There were no changes in gingival color, contour, consistency and texture, tooth mobility, or periodontal pocket depth. Nicotine polacrilex does not appear to have any significant adverse effects on the gingiva even with up to 6 months of daily use.

Chewing Gum↗
PubMed1990

Oral presentation of Wegener granulomatosis.

Although the mouth is often involved in Wegener granulomatosis, oral lesions as the initial sign are rare. This case report documents the importance of considering Wegener granulomatosis in patients with unique oral lesions. The most common lesion is a friable-granular-hyperplastic gingivitis associated with alveolar resorption and tooth mobility. The disease may remain localized to the mouth for several weeks or months before multiorgan involvement occurs. Gingival enlargement is a direct manifestation of Wegener granulomatosis, and it may be pathognomonic. Failure to recognize the clinical lesions can result in delayed diagnosis and treatment, with potentially fatal results.

Adult↗
PubMed1994

Head and neck lesions commonly found in musicians.

Common problems in playing musical instruments include soft tissue lesions, tooth mobility, malocclusion, TMD and endodontic pathoses. This article illustrates the basic playing positions of the instruments and their effects on head and neck structures to help dentists provide appropriate diagnosis and treatment.

Cumulative Trauma Disorders↗
PubMed1998

Use of bone grafting in the management of a troublesome operative site planned for future implant restoration.

Dentists who begin placing dental implants need to develop skills in grafting. These skills will assist the practitioner in providing future options to the patient. Due to the many variables involved in the case presented, a decision was made that offered benefits to the patient following an insult to the existing teeth and alveolar structures. Due to the emergency nature of the treatment and to the introduction of a protocol that took into consideration the preservation of the patient's bony architecture and the manner in which restorative procedures were utilized, this case contains information that may be of benefit to the general practitioner.

Adult↗
PubMed2005

Regeneration of class II furcation defects: determinants of increased success.

One of the most important indications for guided tissue regeneration (GTR) treatment is class II furcation lesion. However, periodontal regeneration of this type of defect, although possible, is not considered totally predictable, especially in terms of complete bone fill. Many factors may account for variability in the response to regenerative therapy in class II furcation. The purpose of this review is to assess the prognostic significance of factors related to the patient (smoking, stress, diabetes mellitus, acquired immunodeficiency syndrome and other acute and debilitating diseases, and the presence of multiple deep periodontal pockets), local factors (furcal anatomy, defect morphology, thickness of gingival tissue and tooth mobility), surgical treatment (infection control, bone replacement grafts combined with barriers or GTR alone, type of barrier and surgical technique), and postoperative period (plaque control, membrane exposure, membrane retrieval and a regular supportive periodontal care program) for successful of GTR in class II furcations.

Chronic Disease↗
PubMed2003

Induced elephant (Loxodonta africana) tusk removal.

Elephant tusk removal usually requires costly surgical procedures that are time-consuming and present a significant risk to the animal when performed using general anesthesia. Such techniques require gauges, chisels, and forceps to remove the tusk. This article reports the simple removal of the tusk of an 18-yr-old African elephant (Loxodonta africana) without the use of surgical instruments and anesthesia. Rubber elastics were placed around a tusk, causing loss of alveolar bone with subsequent exfoliation of the tusk within 3 wk. The healing process was uneventful.

Animals↗