comparison between the effects of miniplat fixation and other methods of fixation of displaced subcondylar fractures on dog temporomandibular joint [radiographical and histological study]

However, management of displaced condylar fractures is still controversial as it may be managed by MMF, transosseous wiring and miniplates. The present study was performed to evaluate the histological and radiographic changes of the TMJ area after inducing displaced subcondylar fracture in dogs through preauricular approach and fixation. The animals were divided into three groups [A,B and C]. In group A: the ftactured segments were reduced and MMF was applied for 7 days. In group B: the fractured segments were reduced and fixed by interosseous wiring. In group C. displaced condylar process was reduced and a titanium miniplate was introduced to fix the fracture. Each group was subdivided into two subgroups according to the sacrification date [45 and 90 days after surgery]. Results indicated that the TMJ exerted variable histologic and radiographic responses in different groups at the various sacrification dates indicating the various effects of each technique on the joint and the miniplate fixation in cases of displaced subcondylar fracture gave the most favorable results. Consequently, it is the technique of choice for such cases

Cardiovascular and haemodynamic changes in healthy and cardiac patient undergoing dental extraction

A clinical study was performed to investigate the role of Midazolam as sedative agent on the possible incidence of ischemic changes which occur during dental extraction for ambulatory patients receiving local anaesthesia and also to identify which group of cardiac patients is mostly at risk during minor oral surgical procedures. Forty patients aged between 20- 50 year represent the materials of this work, of the forty patients, ten healthy patients act as a control group. The thirty patients had a cardiac disease. All patient were monitored for recording [HR], [SBP], [DBP] and [MAP] by automatic non invasive blood pressure monitor. Midazolam 1 mg was given IV. to all patients and the previous parameters were recorded after 5 minutes, at 1 and 5 minutes post injection of local anaesthetic [Mepicaine] and at 1 and 5 minutes after tooth extraction. The threshold for myocardial ischemia used in this study includes RPP values more than 12.000 and PRQ values less than 1.0. Sedation produced significant decrease in the RPP values in all groups [P < 0.05]. Whereas, it produced insignificant change in PRQ values. This beneficial effect of sedation would be recommended for cardiac patients, especially hypertensive patients who have more risk than the other patients to develop myocardial ischemia during dental extraction under local anaesthesia