Correlation between the thickness of the crestal and buccolingual cortical bone at varying depths and implant stability quotients.

BACKGROUND/PURPOSE: Resonance frequency analysis (RFA) is clinically used in dentistry to access the stiffness of dental implants in surrounding bone. However, the clear advantages and disadvantages of this method are still inconclusive. The aim of this study was to investigate and compare implant stability quotient (ISQ) values obtained from RFA with parameters obtained from a cone beam computed tomography (CBCT) scan of the same region. MATERIALS AND METHODS: Nineteen implants (Conelog) were inserted in the posterior maxillary and mandibular partially edentulous regions of 16 patients. At the time of implant placement, the ISQ values were obtained using RFA (Osstell). CBCT was used to measure the thickness of the crestal, cortical, buccolingual cortical, and cancellous bone at 3, 6, and 9 mm below the crestal bone level, as indicated by radiographic markers. The ratio of the thickness of the cortical to cancellous bone at varying depths was also calculated and classified into 4 groups (Group 1-4). RESULTS: There was a strong correlation between the crestal cortical bone thickness and ISQ values (P<0.001). The thickness of the buccolingual cortical bone and ratio of the cortical to cancellous bone thickness at 3 mm were significantly related to the ISQ (P = 0.018 and P = 0.034, respectively). Furthermore, the ISQs in Group 1 were the highest compared with those in Group 2 and Group 3, whereas the CBCT parameters at 6 and 9 mm did not have any specific correlation with the ISQ values. CONCLUSION: This study showed that the ISQ values obtained from RFA highly correlated with the quantity and quality of bone 3 mm below the crestal bone level. The correlation between the ISQ and bone surrounding the implant site was dependent on the depth of measurement. Therefore, RFA can help to predict the marginal bone level, as confirmed in this study.

Prosthodontic rehabilitation of congenital auricular defect: a clinical report.

This clinical report presents the prosthetic rehabilitation of a congenital auricular defect. The rehabilitation was initially performed with an adhesive retained silicone prosthesis. After careful evaluation of the patient's retentive needs, two endo-osseous craniofacial implants were placed in the mastoid region. After integration, an implant-retained silicone prosthesis was fabricated using a Hader bar with two ERA attachments, which restored the defect with good aesthetic and functional outcome. Prosthetic rehabilitation is a viable treatment option for restoring auricular defects and can be indicated in situations where surgical reconstruction may not be feasible.

Rapid fabrication of silicone orbital prosthesis using conventional methods.

Restoration of orbital defects with silicone prosthesis has been a well-documented and accepted treatment option. Adhesive retained prosthesis offer the patients with adequate retention and treatment satisfaction. However, marginal breakdown and discoloration are common problems associated with these prostheses, necessitating their refabrication. Fabrication of a silicone orbital prosthesis is time consuming and requires multiple clinical and laboratory procedures. This technical article describes simple and cost effective steps for rapid fabrication of a silicone prosthesis using conventional methods.

Fabrication of a new silicone auricular prosthesis without removing the existing metallic framework.

Silicone prostheses require constant repair and refabrication. Auricular prostheses retained with implants have better retention than adhesive-retained prostheses. However, refabrication is complicated if the patient is unwilling to surrender the metallic framework attached to the implants and revert to the use of adhesives. This article describes a technique by which the metal framework of the existing prosthesis need not be removed, thereby improving the patient's quality of life until the new prosthesis is delivered.

Preventive effects of Morus alba L. anthocyanins on diabetes in Zucker diabetic fatty rats.

The mulberry plant (Morus alba L.) contains abundant anthocyanins (ANCs), which are natural antioxidants. The aim of this study was to determine the ANC composition of Thai Morus alba L. fruits and to assess the effect of an ANC extract on blood glucose and insulin levels in male leptin receptor-deficient Zucker diabetic fatty (ZDF) rats. The major components of the ANC extract were identified by high-performance liquid chromatography-electrospray ionization-mass spectrometry. ZDF and lean rats were treated with 125 or 250 mg ANCs/kg body weight, or 1% carboxymethylcellulose (CMC) twice daily for 5 weeks. Neither ANC dose had an effect on body weight. Following 5 weeks of treatment, glucose levels were observed to increase from 105.5±8.7 to 396.25±21 mg/dl (P<0.0001) in the CMC-treated ZDF rats; however, the glucose levels were significantly lower in the rats treated with 125 or 250 mg/kg ANCs (228.25±45 and 131.75±10 mg/dl, respectively; P<0.001 versus CMC). The administration of 250 mg/kg ANCs normalized glucose levels in the ZDF rats towards those of the lean littermates. Insulin levels were decreased significantly in the ZDF rats treated with CMC or 125 mg/kg ANCs (P<0.0001), but not in the rats treated with 250 mg/kg ANCs. Histologically, 250 mg/kg ANCs was observed to prevent islet degeneration compared with the islets in CMC-treated rats. This study, demonstrated that ANCs extracted from Morus alba L. were well tolerated and exhibited effective anti-diabetic properties in ZDF rats. ANCs represent a promising class of therapeutic compounds that may be useful in the prevention of type 2 diabetes.

Late effects of orbital enucleation and radiation on maxillofacial prosthetic rehabilitation: A clinical report.

The retinoblastoma is one of the most common tumors of the eye diagnosed in childhood. The treatment for patients with retinoblastoma includes surgical removal of the lesion along with adjunctive chemotherapy and radiotherapy. If the tumor is controlled, these treatments can have secondary adverse effects pertaining to the growth and development of orofacial structures in young patients. This clinical report describes the prosthetic rehabilitation of a patient who underwent enucleation followed by radiation therapy and adjunctive chemotherapy to treat the primary diagnosis of retinoblastoma. This therapy resulted in a combination of dental and facial growth and developmental abnormalities.

Silicone nasal prosthesis retained by an intranasal stent: a clinical report.

Nasal defects after tumor excision can leave a patient functionally and esthetically impaired. Loss of nasal septal cartilage support causes the soft tissue to collapse or undergo stenosis, further compounding the problem. Intranasal stents can be used to maintain the patency of such nasal defects. This clinical report describes the use of an acrylic resin nasal stent bonded to a silicone nasal prosthesis to rehabilitate a patient with a nasal defect.