International Journal of Periodontics & Restorative Dentistry, 2/2023
DOI: 10.11607/prd.6241, PubMed-ID: 37232683Seiten: 213-221, Sprache: Englisch
Periodontal regeneration therapy has developed tremendously since its inception, becoming a clinical tool to preserve the periodontally compromised natural dentition. More challenging esthetic defects can often benefit from the combination of bone and soft tissue regeneration, such as the application of connective tissue grafts (CTGs) and techniques that approach the bone defect without interdental papillae incisions. However, periodontal tissue regeneration vertical to the alveolar bone crest in cases of severe periodontitis, with loss of both soft and hard tissues, has not been predictably established. This case report describes a patient with severe periodontitis that was treated with in supra-alveolar periodontal tissue reconstruction. This innovative surgical technique requires both horizontal buccal incisions and several vertical palatal incisions, avoiding the interdental papillae on the periodontal defect. Then, a space is created by suspending and fixating the flap coronally, and CTG and regenerative materials (such as recombinant human fibroblast growth factor-2) and bone graft material are applied. This technique has the potential to gain clinical attachment, achieve supra-/intraperiodontal regeneration, and enhance esthetic outcomes, including a reduced gingival recession and interdental papillae reconstruction. The clinical results of the present case were well maintained over the 2-year follow-up.
International Journal of Periodontics & Restorative Dentistry, 4/2013
DOI: 10.11607/prd.1460, PubMed-ID: 23820701Seiten: 437-445, Sprache: Englisch
The purpose of this case series was to report the clinical outcomes and histologic findings of vertical ridge augmentation using a combination of titanium mesh, resorbable collagen membrane, and recombinant human plateletderived growth factor BB (rhPDGF-BB). Nineteen patients were included, and autogenous bone and anorganic bovine bone particles were used. The bone graft was mixed with rhPDGF-BB and loaded onto the bony defect up to the level of the adjacent alveolar crest. A pre-adapted titanium mesh was placed over the grafted region and covered with a resorbable collagen membrane, leaving no areas of the grafted region exposed. Seventeen patients exhibited good soft tissue healing. Postoperative flap dehiscence occurred relatively early in the healing period in one patient, whereas the covering collagen membrane was exposed during the later phase of the healing period in another. During reentry surgery for removal of the titanium mesh, three patients with favorable soft and hard tissue healing underwent bone biopsies for histologic evaluation of the augmented tissue just below the titanium mesh. The mean vertical height of augmented bone was 8.6 ± 4.0 mm. This report demonstrates the remarkable efficacy of guided bone regeneration using a combination of titanium mesh, resorbable collagen membrane, and rhPDGF for vertical ridge augmentation, thus expanding the indications for implant therapy and allowing recovery of the three-dimensional esthetic architecture in a severely absorbed alveolar ridge.
International Journal of Periodontics & Restorative Dentistry, 5/2010
PubMed-ID: 20814604Seiten: 503-511, Sprache: Englisch
Achieving an esthetic outcome in tooth replacement and implant treatment requires a proper tooth shape and stable surrounding soft tissue profiles. Bone augmentation is considered vital to support the esthetic soft tissue profile around definitive restorations. To prevent recession of the peri-implant soft tissue in cases with multiple implants, buccal bone augmentation of more than 2 mm from the implant platform is necessary to overcome the normal pattern of bone remodeling. Drawing an imaginary horizontal line spanning the space between the remaining healthy interproximal bone peaks is the most reliable vertical augmentation target to create esthetic papillae around an implant prosthesis. Provided that the adjacent bone peaks are at an ideal height and the bone is augmented vertically up to this line, the accepted general guideline of 2 to 3 mm of interproximal vertical bone augmentation from ideally placed implant platforms will invariably also be achieved. In addition, placing pontics in strategic positions to avoid consecutively placed implants has been suggested to facilitate vertical bone height preservation after bone augmentation. Even with esthetically successful results, there have been very few long-term studies on compromised cases with multiple implants. This will become more and more critical over time and must be remedied.
QZ - Quintessenz Zahntechnik, 8/2009
Exzellente Dentale ÄsthetikSeiten: 959-960, Sprache: Deutsch
International Journal of Periodontics & Restorative Dentistry, 6/2007
PubMed-ID: 18092446Seiten: 521-527, Sprache: Englisch
A single-tooth implant in the esthetic region has good potential for success, but it is still challenging to restore multiple-tooth defects with implant-supported prostheses that resemble the natural dentition. This article suggests a strategy to provide a more predictable protocol for esthetic implant treatment for multiple-tooth defects using the root submergence technique (RST). By maintaining the natural tooth root with the RST, a much greater amount of surrounding tissue may be preserved than with the commonly used socket preservation technique, which almost always leads to crestal bone resorption and thus reduction of the height of the interdental papillae and width of the edentulous ridge. RST instead maintains the natural attachment apparatus of the tooth in the pontic site, which in turn allows for complete preservation of the alveolar bone frame and assists in the creation of an esthetic result in adjacent multiple-tooth-replacement cases. In situations with periodontal bone loss, orthodontic extrusion is required to create the underlying bone support for the papilla that is necessary to guarantee predictability.
International Journal of Periodontics & Restorative Dentistry, 4/2007
PubMed-ID: 17726987Seiten: 312-323, Sprache: Englisch
Many articles address the predictability of immediate implant placement into extraction sockets; however, there are only a few reports that mention the indications and limitations of this technique. The aim of this article is to re-examine specific indications for immediate implant placement and to clarify the timing or "fourth dimension" relative to extraction and implant placement. The expanded concept of four-dimensional implant treatment planning involves the new axis of time, which must be considered along with the traditional spatial or threedimensional management of implant positioning.