or chronic maxillary sinusitis

Poster Session a bone defect and promote healing. In this clinical case report, to evaluate new bone formation after sinus floor elevation and alveolar bone augmentation using an interconnected superporous HA with bTCP by means of clinical and histological examination of human biopsies. An interconnected superporous HA (Apaceram-AX, Japan) has 85% porosity and contains macropores more than 100 mm in diameter that are spherical and interconnected. In addition, it has micropores ranging from several hundred nanometers to several micrometers in diameter that create a rough surface on the macropores2). A composite of 90% HA granules and 10% bTCP (Cerasorb, Germany) granules were placed on the augmented region and covered by means of an e-PTFE membrane (Cytoplast, USA) for GBR. Implant placements were used simultaneously or 2-staged (5 months after the augmentation) approach. The membrane was removed after 6 weeks. The specimens obtained after 5 months were analyzed histologically and histomorphometrically with special focus on bone remodeling within the residual bone and the augmented region. Quantitative and qualitative bone assessment of augmented bone was analyzed using cone-beam computed tomography (CBCT). All patients gave written informed consent before surgery, in accordance with the principles of the Declaration of Helsinki. This case study revealed that newly formed bone with the vascularization which covered over the implant was already observed at the point of membrane removal. CBCT image showed that the calcified area of the augmented region with the composite bone substitutes gradually increased from the residual bone with time. Histological sections revealed that the newly formed bone with bone marrow was observed around Apaceram-AX granules. Furthermore, the pores seem to be fusing suggesting mild resorption of the material and slow degradation of its structure. However, Cerasorb was almost degraded and replaced new bone at the augmented region. The results also showed that bTCP granules promoted bone remodeling in the early period, and the interconnected superporous hydroxyapatite granules provided continuous natural bone remodeling. It can be used with success as a bone substitute composite in the bone augmentation to provide adequate support for implants.

Purpose: This study was aimed to evaluate the clinical prognosis of sinus bone graft in the patients with mucous retention cyst and/or chronic maxillary sinusitis. Materials and Methods: This study was performed retrospectively to the 19 patients (17 males, 2 females) who were treated with dental implants from January 2008 to December 2010 at Department of Oral and Maxillofacial Surgery, Section of Dentistry, Seoul National University Bundang Hospital. All patients had mucous retention cyst and/or chronic maxillary sinusitis before receiving the implant treatments. The mean age of the patients was 50 yrs old (39yr71yr). 10 patients previously had mucous retention cyst and 12 patients already had experienced chronic sinusitis. These patients received sinus bone graft using a lateral approach technique. The fixtures of implants were installed in average of 21.85 weeks after the sinus bone graft, and the restorations were connected in average of 32.7 weeks after the implant installation. Status of the gingiva, marginal bone height measured by periodontal probing and the mobility of the implant were observed for 20.7 months after installation of the implants. Results: Complications of sinus bone graft occurred in 6 patients: 10%( 1 out of 10 cases) of the patients with mucous retention cyst and 33%(4 of 12 cases) of the patients with chronic sinusitis. Complications were composed of 3 epistaxis and 2 pus discharge cases. All complications were subsided using antibiotic medication and conservative dressing. All implants in this study survived during the observation. Conclusion: The sinus bone graft was performed to the patients who had mucous retention cyst and/or chronic sinusitis. The complications after the operation were subsided. The clinical prognosis was not affected by the types of the two diseases.

References:

Objective: This study aims to evaluate the prognosis of single cantilevered restoration, retrospectively. Materials and Methods: This study targeted 34 patients (20 males, 14 females)who were treated with a single cantilevered restoration (mesial direction or distal direction) combined with implant installation from May 2004 to December 2013. Radiographic examinations were taken after the implant installation, 1-year after the restoration, and at every OPD (outpatient department) follow-ups during an average of 4 years, and the status of the implant restorations were evaluated at each time. The prognosis was analyzed by clinical finding

1. Clin Oral Implants Res 2008; 19:19-25 2. Arch Orthop Trauma Surg 2012;132:1603-1610.

POSTER 27 Clinical evaluation of sinus bone graft in the patients with mucous retention cyst and/or chronic maxillary sinusitis S. Kim: Section of Dentistry, Seoul National University Bundang Hospital, Y. K. Kim, P. Y. Yun, J. H. Bae e-66

POSTER 28 The clinical prognosis of single cantilevered restoration: the retrospective study S. B. Kim: Section of Dentistry, Seoul National University Bundang Hospital, Y. K. Kim, P. Y. Yun, J. H. Bae

AAOMS  2014