A case rehabilitated with fixed bridge and clasp-retained removable partial dentures for a partially edentulous patient with cosmetic disturbance and severe periodontal disease (original) (raw)

2015, Annals of Japan Prosthodontic Society

Patient: A 62-year-old female patient presented with chewing difficulty and a request for good esthetics. The occlusal function was severely compromised because of increased mobility of the posterior dentition. Following the extraction of hopeless teeth, partially edentulous arches were restored with a maxillary nine-unit fixed restoration and maxillary and mandibular bilateral free-end saddle dentures. Discussion: The oral health-related quality of life and subjective chewing ability were improved and high patient satisfaction was reported after the definitive prosthodontic replacements. The results were partly due to the effects of reconstructed occlusion by the fixed splinting and removable partial dentures that were rigidly retained in the maxillary and mandibular arches by the Co-Cr precision frameworks. The periodontal tissues and restorations have been maintained for more than 3 years. Conclusion: Periodic post-operative recalls suggest that a combination of a long-span fixed bridge and removable partial dentures functions well for the partially edentulous patient with advanced periodontitis.

Intensity of Singular Stress Field due to Wedge-Shaped Defect in Human Tooth after Restored with Composite Resins

Journal of the Society of Materials Science, Japan, 2006

Wedge-shaped defects are frequently observed on the cervical region of the human tooth. Previously, most studies explained that improper toothbrushing causes such defects. However, recent clinical obsarvation suggested that the repeated stress due to occlusal force may induce the formation of these wedge-shaped defects. In this study, a two-dimensional human tooth model after a wedge-shaped defect is restored with the composite resin is analyzed by using the finite element method. To obtain the intensity of the singular stress field accurately, a method of analysis is discussed for calculating generalized stress intensity factors, which control the singular stress around the tip of the defect. Then, the relationships between the stress intensity and occlusion are discussed.

開咬を伴う重度慢性歯周炎患者に包括的な治療を行った一症例

Nihon Shishubyo Gakkai Kaishi (Journal of the Japanese Society of Periodontology), 2008

Shinoda Dental Clinic Abstract:A patient with generalized chronic periodontitis and posterior bite collapse was administered comprehensive treatment, including peiodontal surgery, dental implants and orthodontic treatment. A modified-hawley bite plane was also used to establish a proper position of the mandible. The attachment level and occlusion were well maintained for more than 3 years.

Clinical evaluation of hydroxyapatite-coated single-tooth implants: a 5-year retrospective study

PubMed, 2001

The use of implants to replace missing single teeth has become a valuable treatment option. This study presents a 5-year retrospective clinical analysis of single teeth replaced with hydroxyapatite-coated implants. Of the 271 cylinder and screw implants placed over this period, 12 were lost (survival rate = 95.57%). In addition to aesthetic compromise, the most frequent complication was loosening of the abutment screw. These results corroborate findings from the literature and suggest that the described procedure can be safely performed in daily restorative procedures.

Pyoderma gangrenosum arising after the surgery for lower gingival cancer

Journal of Japanese Society of Oral Oncology, 2018

Pyoderma gangrenosum (PG) is an uncommon rapid progressive and ulcerating skin disease of unknown etiology. The early lesion shows a clinical feature similar to postoperative infection, so the diagnosis of PG is difficult. In this report, we present a rare case of PG arising after surgery for oral cancer. A 72-year-old woman received radical resection for lower gingival cancer with reconstruction using delto-pectoral flap (D-P flap). Six days after the surgery, she had pyrexia and water diarrhea. The submandibular skin around the insertion site of the D-P flap became reddish with diffuse swelling, pus discharge and severe tenderness. A provisional diagnosis was postoperative infection of the wound. Although the patient was given repeated courses of antibiotics, debridement and drainage, the lesion extended to the whole neck of the affected side and a necrotic ulcer with bluishpurple undermined borders surrounded by erythema was observed 13 days after the surgery. The patient was referred to a dermatologist and PG was strongly suspected. From the postoperative 15 th day, treatment with prednisolone and minocycline over the next several days improved her symptoms dramatically. Histopathological examination revealed that severe inflammatory cells, predominantly of neutrophils, had infiltrated into the dermis without bacterial components. These clinical and histopathological findings fulfilled the diagnostic criteria of PG. PG should be taken into consideration as a potential complication in oral and maxillofacial surgery too.

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