Adenomatoid odontogenic tumour of the jaws

The adenomatoid odontogenic tumour of the jaws is rare. It is important to differentiate it from other odontogenic tumours because of its benign behaviour and this can be reliably done by the histological features.     

The Effect of Fatigue Damage on the Force Required to Remove a Restoration in a Cement-Retained Implant System

PURPOSE: To evaluate the luting agents and retentive forces before and after mechanical stressing. MATERIALS AND METHODS: Sample size N was 12 for each group, and 12 Cera-One closed-end gold cylinders were cemented with three types of luting cements (ImProv, UltraTemp, and TempBond). The force required to remove the gold cylinders from the abutments was determined with an MTS testing machine. After cleaning and recementing the cylinders, the samples were placed in the housings of an Alabama-type three-body wear machine and load of 110 N was applied to the gold cylinders at a frequency of 80 cycles/min for 50,000 cycles. Then each cylinder was pulled from its abutment and the force at which the failure occurred was recorded. The procedure was repeated with 300,000 cycles. RESULTS: Statistical analysis arising from two-way ANOVA found that the forces required to remove the abutments were significantly different. The most retentive cement was ImProv. Before cyclic loading, on average, ImProv produced a retentive value 85% higher than that yielded by TempBond, and 25% higher than that of UltraTemp. The three cements were significantly different at each of the three cycle levels. CONCLUSIONS: These results might suggest TempBond luting agent as the material of choice for provisional cementation because it allows easier removal of the prosthesis and maintains enough retention to prevent loosening of the restoration. The clinical implication is that the effect of cyclic load on the strength of the cements is different, an important factor in selection of a cement. ImProv had the highest retentive value before and after the two cycles, and TempBond had the lowest. UltraTemp had the highest percentage of retentive value lost. TempBond had no significant loss under loading even though initially it was the weakest.     

Mandibular nerve neurosensory impairment after dental implant surgery: management and protocol

More than 70% of dentists have experienced patients with postoperative paresthesia/dysesthesia or anesthesia as a result of dental procedures. The most common nerve affected is the mandibular nerve, which may be injured during either implant surgery or bone grafting procedures. However, no organized protocol directed specifically for general dentists, or for the vast majority of specialists, has been published. The protocol presented in this article is divided into 5 periods: during surgery (1) nerve injury is suspected or (2) known nerve transection, post-operative period (3) 1 week and (4) 12 weeks. The appropriate treatment (pharmacology, monitoring, etc.) for each period is suggested, including the referral to a nerve specialist when appropriate.     

A retrospective analysis of osseotite NT implants in clinical practice: 1-year follow-up

This article reports the preliminary results from a clinical study involving the use of implants with a natural taper design in edentulous and partially edentulous patients. Implants were followed for at least 12 months after occlusal loading. Three hundred nine implants were placed by two periodontists (176 maxillary, 133 mandibular; 198 anterior, 111 posterior). Digital radiographs were taken immediately after implant placement and 1 year after occlusal loading. Computerized measurements were made, with distances calculated between the implant restorative platforms and the greatest heights of interproximal bone on both interproximal surfaces at the time of implant placement and 12 months postplacement. At the 12-month recall appointments, it was noted that 8 of the 309 implants had failed. Osseotite NT implants can be used in the treatment of edentulous and partially edentulous patients using two-stage, single-stage, and immediate occlusal loading protocols with survival rates equivalent to those seen for cylindrically shaped implants.     

Dental abnormalities and bone lesions associated with familial adenomatous polyposis: report of cases

Dental abnormalities and bone lesions of the maxilla and mandible are found in more than 70% of patients with familial adenomatous polyposis (FAP). Dental abnormalities include impacted teeth (other than third molars), supernumerary teeth, congenitally missing teeth, and fused roots of molars. Bone lesions consist of osteomas--isolated or in clusters--in the maxilla and mandible. In this study of 24 patients, 75% had demonstrable dental abnormalities, and 79% had osteomas of the maxilla and mandible. Because dental abnormalities and bone lesions are present early in life, these features may be helpful in diagnosing this syndrome.     

Myositis ossificans traumatica of the masseter muscle: Review of the literature and report of two additional cases

Myositis ossificans traumatica of the masseter muscle is uncommon. The condition is benign and results in reactive heterotopic bone formation, usually producing limitation of opening of the jaws. Radiographic and microscopic examination can confirm the diagnosis. Treatment of myositis ossificans traumatica of the masseter muscle is surgical, with other modalities used when occurring in other muscles of the body     

Smoking and Oral Health: a Population Survey in Finland

Objectives: A survey was conducted to study smokers' oral health behaviors and attitudes, and to determine if smokers were advised by their dentists to quit smoking. Methods : A random sample of 1,200 adults 15 to 64 years of age living in the province of North Karelia, Finland, was selected in each of two study years (1990 and 1991) and surveyed using a mail questionnaire. The 102-item questionnaire solicited information on smoking status, oral health behaviors, missing teeth, perceptions of tobacco's harmful effects on oral health, smoking status and quitting, and advice on smoking cessation provided by dentists. Variations in behaviors and opinions according to smoking status were analyzed. Results : Nonsmokers reported more frequent healthy oral health behaviors than did daily smokers, with the exception that no difference in toothbrushing frequencies existed among women. Daily smoking was associated with increased use of sugar in tea or coffee, and with more frequent alcohol consumption. Daily smoking was correlated with the number of missing teeth in bivariate analyses, but not in multivariate analyses. Fewer daily smokers than nonsmokers considered smoking to have harmful effects on oral health. The majority of daily smokers, however, wanted to quit. Eight percent of daily smokers reported that they had been advised by their dentist to quit. Conclusions : Dentists need to provide patients with counseling on tobacco use because of the desire of many smokers to quit. Counseling of smokers by the oral health team requires special attention and skills, because smokers' health behaviors and attitudes appear to be less favorable to oral health compared to nonsmokers.     

Pediatric fluid resuscitation after thermal injury

Fluid resuscitation after thermal injury in a child or infant can pose a set of unique and significant challenges. Many approaches to fluid resuscitation of children after burns exist, and most are nonevidence based. This review will highlight the important concepts involved in pediatric fluid resuscitation from thermal injury.