Sterilization of complete dentures with sodium hypochlorite

It is important to give the patient a denture that is clean and free from cross-contamination. This study was made to determine if Clorox could be used as a rapid, safe, and clinically effective way to sterilize complete dentures. The data obtained from this study indicate that a 5-minute immersion of dentures in undiluted Clorox accomplished sterilization against a variety of microorganisms, including a spore-forming bacteria and C. albicans.     

Perturbation of cobalt 60 radiation doses by metal objects implanted during oral and maxillofacial surgery

The influence on cobalt 60 dose distributions of typical metal parts used in oral and maxillofacial surgery was studied. Relative doses were determined by exposing x-ray films in a polystyrene phantom set-up containing samples of Vitallium, titanium, and stainless steel. Optical densities were converted to doses with the aid of sensitometric curves. The results show that for normal incidence there is a 25% to 40% increase in dose at the entrance side of the metal and a 20% to 25% decrease in dose at the exit side. The enhancement effect falls off rapidly and becomes negligible at about 1 mm from the interface. The reduction effect decreases more gradually and is still evident at distances of a few centimeters. These dose perturbations should be taken into account in the planning of radiation therapy for patients in whom metal objects have been implanted.     

The correlation of temporomandibular joint sounds with joint morphology in fifty-five autopsy specimens

Joint sounds from 55 fresh temporomandibular joint autopsy specimens were correlated with the macroscopic examination of joint morphology. Fifty-eight per cent of the joints were silent. Two thirds of these showed normal superior disc positions and remodeled articular surfaces, whereas one third exhibited anterior disc displacement. Twenty per cent of the joints elicited clicking and showed anterior disc displacement. Twenty-two per cent of the joints elicited crepitation and exhibited mostly arthrosis of the articular surfaces and perforation of the discs. Our results confirm previous statements that clicking and crepitation may be looked upon as signs of abnormal joint morphology, clicking indicating anterior disc displacement and crepitation usually indicating arthrosis. Absence of sound alone, however, should not be accepted as an indication of a normal joint.     

Antibiotic prophylaxis in intraoral orthognathic surgery

A prospective randomized double-blind study was conducted to evaluate two prophylactic antibiotic regimens in a population of 40 patients undergoing intraoral orthognathic surgery. All patients received one intramuscular dose of 600,000 units procaine penicillin G and 400,000 units aqueous penicillin G preoperatively. Two million units aqueous penicillin G were administered intravenously every three hours intraoperatively and postoperatively three hours after the last intraoperative dose. One group of 20 patients then received 2 million units aqueous penicillin G intravenously every four hours for a total of 12 doses (two days) postoperatively. The second group of 20 patients received a placebo intravenously every four hours for a total of 12 doses (two days) postoperatively. Three infections occurred in the group of patients receiving the placebo postoperatively and none in the group of patients receiving the antibiotics postoperatively.     

Differential expression of salivary S100A7 in oral submucous fibrosis

Aim

To investigate the expression of salivary S100A7 levels among patients with oral submucous fibrosis (OSF) and healthy controls.

Myotonic dystrophy: surgical and anesthetic considerations during orthognathic surgery

The surgical and anesthetic considerations of orthognathic surgery for a patient with myotonic dystrophy are discussed. A case report is presented demonstrating how a surgical treatment plan can be modified to avoid the potential postoperative problems associated with this disease.     

微机化多功能力仪的研制及应用

介绍具有多功能、多通道及多参数测试特点的微机化力测试仪的研制方法，并用其进行了无牙颌患者戴全口义齿后咀嚼不同食物时的咀嚼力测试研究。测试表明，仪器性能稳定，灵敏度高，重复性好，数据可靠，测试结果满意