A Comprehensive Clinical Review of Maxillary Sinus Floor Elevation in Patients with Well-Defined Faintly Radiopaque Lesions in the Antrum.

Well-defined, faintly radiopaque lesions are occasionally observed in the antrum of the maxillary sinus in asymptomatic patients during maxillary sinus floor elevation. These lesions are treated as antral pseudocysts (AP) based on the clinical diagnosis in some cases, and maxillary sinus floor elevation is performed without enucleating these lesions. However, further surgery is required after implant placement if the lesion is a mucocele, odontogenic cyst, or tumour.

A Reliable Surgical Procedure for Sinus Floor Augmentation with Antral Pseudocysts.

An antral pseudocyst (AP) is a common well-defined 'dome-shaped' faintly radiopaque lesion of the maxillary sinus, and usually does not require treatment in asymptomatic patients. However, when sinus floor augmentation is required to increase bone volume for implant installation, the elevation of the sinus mucosa might drive the AP against the ostium. This might cause its obstruction and, as possible consequence, sinusitis.

Horizontal alveolar ridge distraction osteogenesis in dogs: radiographic and histologic studies.

Purpose: This study was designed to evaluate the healing process in horizontal alveolar ridge distraction of the narrow alveolus in dogs.

Materials And Methods: Six beagle dogs weighing approximately 9 to 10 kg were used in this experiment. Horizontal alveolar ridge distraction was performed in the right mandible, where the premolars had been extracted 12 weeks previously.

Vitamin D receptor gene polymorphism is associated with chronic periodontitis.

Chronic periodontitis (CP) is caused by enhanced resorption of the alveolar bone supporting the teeth and is associated with intraoral inflammation after infection with certain bacteria. The VDR gene polymorphism was reported recently to be deeply related to the occurrence of tuberculosis and infection of chronic hepatitis B virus. This may be interpreted to indicate a close relationship between VDR gene polymorphism and the immunological action, because vitamin D activates monocytes, stimulates cell-mediated immunity, and suppresses lymphocyte proliferation.

Bone morphogenetic protein-4 gene polymorphism and early marginal bone loss around endosseous implants.

Purpose: At stage II surgery during dental implant treatment, early marginal bone loss around the implant occasionally occurs despite a lack of apparent causal events, and the etiology of this bone loss is unclear. This study was designed to investigate whether the bone morphogenetic protein-4 (BMP-4) genetic polymorphism is associated with early marginal bone loss around implants.

Materials And Methods: The BMP-4 polymorphism was detected by restriction fragment length analysis using HphI digestion after polymerase chain reaction.

Genetic polymorphisms of the interleukin-1 gene and early marginal bone loss around endosseous dental implants.

Dental implant surgery commonly proceeds in two stages. It is generally accepted that bone loss around implants does not occur at stage-II surgery because implants do not receive mechanical loading. However, early marginal bone loss around implants occasionally does occur during the healing period.

Endosseous implants in horizontal alveolar ridge distraction osteogenesis.

Purpose: This study evaluated horizontal distraction of the narrow alveolar ridge in dogs and the possibility of achieving osseointegration of implants placed into the distracted site during a consolidation period.

Materials And Methods: Six beagle dogs weighing approximately 9 to 10 kg were used in this experiment. Twelve weeks after extraction of the mandibular premolars, horizontal alveolar ridge distraction was performed using an originally designed lengthening apparatus.

Association of calcitonin receptor gene polymorphism with early marginal bone loss around endosseous implants.

Purpose: This study investigated the relationship between calcitonin receptor (CTR) genotype and buccal marginal bone loss observed at stage II surgery for endosseous implants.

Materials And Methods: A total of 237 implants were placed in 35 patients; 89 implants were placed in maxillae and 148 implants in mandibles. The CTR genetic polymorphism was examined by the polymerase chain reaction restriction fragment length polymorphism method.