Cases reported "Bone Resorption"

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1/6. Anterior open-bite malocclusion: stability of maxillary repositioning using rigid internal fixation.

    A retrospective cephalometric study was performed to investigate the stability of 37 non-growing anterior open-bite cases using mini-plate rigid fixation. The sample was divided into two groups: Group A: maxillary repositioning alone (17 cases) and Group B: bimaxillary surgery (20 cases). Tracings were performed pre-operatively (T1), immediately post-operatively (T2) and at a minimum of one year follow-up (T3) (12-90 months). In Group A, the maxilla was advanced (3.8 /- 2.8 mm, p < 0.01) and superiorly repositioned at PNS (2.8 /- 2.3 mm, p < 0.001). In Group B, the maxilla was advanced (3.5 /- 3.0 mm, p < 0.01) and superiorly repositioned at PNS (3.7 /- 1.8 mm, p < 0.001); and the mandible (11.7 /- 3.8 mm, p < 0.001), with no significant change in the vertical plane (p > 0.05). Late relapse due to condylar remodelling or resorption was found as a cause of large horizontal relapse (8.0 < x < 14.0 mm) in three cases (15%), the amount being associated with the amount of operative advancement (r = 0.7, r-sq = 40%, p < 0.01). It was concluded that the correction of anterior open bite by posterior repositioning of the maxilla using rigid fixation is a stable procedure during the follow-up period, and that in bimaxillary cases, post-operative stability depends largely on the stability of the mandibular advancement, which in turn relates to the amounts of advancement, the pre-operative anterior open bite and the mandibular plane angle.
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ranking = 1
keywords = vertical
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2/6. Reconstruction of severely resorbed atrophic maxillae and management with transitional implants.

    The reconstruction of the severely resorbed maxilla requires complex surgical treatment sequencing. Often, multiple grafting procedures are required either before or in conjunction with implant placement. Regardless of the surgical modality, the grafting procedures and the placement of implants in poor quality bone require undisturbed healing during which no pressure is placed on the grafted implant ridge. The use of transitional implants allows the surgeon to provide stable temporary prostheses throughout the healing phase, while preventing pressure from being placed on the grafted or implant reconstructed ridge throughout the maturation. These transitional implant-supported temporaries allow the implant team to maintain vertical dimension, and they provide the patient with the benefits of implant-supported restorations during the time leading up to final prosthetic reconstruction.
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ranking = 1
keywords = vertical
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3/6. Facial and oral reconstruction following trauma and failed chin implant: a case report.

    Functional and esthetic reconstruction of a patient with microgenia who sustained traumatic injury was successfully accomplished using Branemark System osseointegrated implants (Nobel Biocare USA, Inc., Yorba Linda, CA) to support a permanent dental prosthesis following mechanical and biologic reconstruction of the anterior mandible and chin. A 25-year-old glycine chin implant previously used for facial esthetic enhancement had eroded the anterior cortical plate and migrated through the medullary bone, compressing the periosteum into the apex of the anterior tooth roots. Further destruction of the lingual cortex with risk of fracture was imminent. After removal of the chin implant, a cancellous bone graft was held in place with a titanium mesh frame. The prosthetic rehabilitation consisted of two phases of mandibular implant placement followed by the construction of a porcelain-fused-to-gold implant-supported fixed prosthesis, restoring the occlusal vertical dimension as well as appropriate lip support. Restoration of function was superior to the pretreatment condition.
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ranking = 1
keywords = vertical
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4/6. alveolar bone loss associated with vertical root fractures. Report of six cases.

    Six cases of vertical root fractures accompanied by vertical bone loss are presented. Possible causes for these fractures are suggested. Four vertical fractures probably resulted from the use of excessive pressure at the time of obturation of the canals. One vertical root fracture may have been caused by the cementation of a post, and another may have been caused by the cementation of an inlay in an endodontically treated tooth. All of the fractures resulted in alveolar bone loss to the apical extent of the fracture lines. The definitive treatment in each case was extraction of the tooth or root amputation. In one case successful treatment was accomplished by apically positioning the flap.
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ranking = 8
keywords = vertical
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5/6. root resorption associated with placement of a ceramic implant. Report of a case.

    Ceramic grafting material was used to treat a vertical osseous defect associated with a maxillary left lateral incisor tooth. The area was monitored at maintenance appointments. root resorption was detected radiographically 12 months after grafting. At 18 months, resorption was evident clinically in the presence of moderate inflammation.
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ranking = 1
keywords = vertical
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6/6. Re-establishing natural tooth position in the endentulous environment.

    The routine prosthetic arrangement of teeth set according to arbitrary criteria frequently results in adaptive problems, tissue damage, poor aesthetics, lack of stability and functional disabilities. A phonetic technique, based on the "S" position of the mandible, in the majority of cases provides a useful aid in achieving natural tooth positions and the occlusal vertical dimension. This technique can enhance the quality of prosthodontic service especially for patients having difficulties with full dentures.
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ranking = 1
keywords = vertical
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