(SEMINAR) LESSON Academic Discipline
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METHODICAL RECOMMENDATIONS FOR INDIVIDUAL WORK OF STUDENTS DURING PREPARATION TO PRACTICAL (SEMINAR) LESSON Academic discipline Surgical stomatology Module № 6 Topic of the lesson №15 Gunshot and non-gunshot damage of upper and lower jaws. Orthopedic and surgical treatments. Course V Faculty International (Stomatological) Poltava 1. Relevance of the topic: One of the important problems of modern oral surgery there are a clinic, diagnosis, treatment and prevention of damage to the maxillofacial region, particularly fractures of the lower jaw, which is the highest percentage of all the facial and neck injuries in peacetime. This is associated with a significant increase in the frequency of road accidents, domestic trauma, the use of different types of knives and the growth of street crime and tensions in society. The study of the subject will allow the future doctor is clearly focused on issues clinics, diagnostic methods of first aid to victims the trauma of the lower jaw, in the subsequent practice will avoid many complications primarily related to improper conduct of the doctors in the early stages of providing assistance (late diagnosis, poor and part-time emergency aid). 2. THE SPECIFIC AIMS: 1. Methods оf diagnostics and first aid at ballistic, not ballistic damages of upper and lower jaws. 2. Methods of diagnostics at damages of bones of upper and lower jaws. 3. The help at damages of bones of upper and lower jaws. 4. X-ray diagnostics at damages of bones of upper and lower jaws. 5. Treatment of damages of bones of upper and lower jaws. 3. BASIC KNOWLEDGE, ABILITIES, SKILLS, WHICH ARE NECESSARY FOR STUDY THEMES (intradisciplinary integration) Names of the The received skills previous disciplines 1. Ethics. To establish into psychological contact to the patient. 2. The organization To apply knowledge of principles of the organization of of public health the help at damages of the facial skeleton. To draw up the services. necessary documentation. 3. Pathological To describe character of pathological changes at damages morphology. of the facial skeleton. 4. Pathological To define the aetiology and pathogenesis of raumatic physiology. conditions. 5. Propaedeutics of To write the scheme of the general inspection of the internal illnesses. patient. To make the examination of the patient. 6. General surgery. To describe principles of diagnostics and treatment damages of bones of facial skeleton To prescribe the circuit of inspection of the patient. 4. Tasks for independent work in preparation for the lesson 4.1. The list of the basic terms, parameters, characteristics which the student should master at preparation for employment: Term Definition Combined is physical, thermal, and/or chemical trauma combined with trauma radiation exposure at a dose sufficient to diminish the likelihood of overall survival or functional recovery. Complex trauma Demages of two and more organs and areas. 4.2. Theoretical questions to lesson: 1. Types of surgical methods of treatment of non-bullet fractures of lower and upper jaw. 2. Definition of a concept “direct and indirect osteosynthesis”. 3. Types of direct osteosynthesis, indications and contra-indications, method of operative interference. 4. Types of indirect osteosynthesis, indications and contra-indications, method of operative interference. 5. Modern methods of surgical treatment of non-bullet fractures of lower and upper jaw (mini plates, transplantates, contour osteoplastics etc.). 6. Mistakes and complications during and after application of surgical methods of treatment of non-bullet fractures of lower and upper jaw. 4.3. Practical works (task) which are executed on lesson: 1. To be able to collect anamnesis from a patient. 2. To be able to examine the patient. 3. To be able to prescribe additional examination methods. 4. To be able to read laboratory data. 5. To be able to read x-rays foto of the head. 6. To be able to carry out a differential diagnosis. 7. To know how to write a medical card. 8. To be able to spend splinting of the patient. THE CONTENT OF THE TOPIC: Complete fractures of the mandible can be divided according to their anatomical location into seven main types. These are: 1. Condylar 2. Coronoid 3. Ramus 4. Angle 5. Body (molar and premolar areas) 6. Symphysis and parasymphysis 7. Multiple and comminuted fractures Fractures in each of these situations have clearly denned signs and symptoms which can be readily elicited even in cases of multiple injury. Condylar fractures These are the most common fractures of the mandible and are the ones most commonly missed on clinical examination. Condylar fractures may be unilateral or bilateral and they may either involve the joint compartment as intracapsular fractures or the condylar neck when they are regarded as extracapsular. The latter are the more common. The extracapsular fracture may exist with or without dislocation of the condylar head, and the upper fragment may either remain angulated on the lower portion of the ramus or be displaced medially or laterally. The commonest displacement is antero-medial owing to the direction of pull of the lateral pterygoid muscle, which is attached to the antero-medial aspect of the condylar head and also to the meniscus of the temporo-mandibular joint. In the immediate post-traumatic phase most fractures in the condylar region exhibit similar signs and symptoms. Unilateral condylar fractures Inspection Any movement of the lower jaw is likely to be restricted and painful. There is often swelling over the temporo-mandibular joint area and there may be haemorrhage from the ear on that side. Bleeding from the ear results from laceration of the anterior wall of the external auditory meatus, caused by violent movement of the condylar head against the skin in this region. In the normal subject the close relationship of the condyle to the skin of the external auditory meatus can be appreciated if the little finger is placed within the external ear and the jaw moved. It is important to distinguish bleeding originating in the external auditory canal from the more serious middle ear haemorrhage. The latter signifies a fracture of the petrous temporal bone and may be accompanied by cerebrospinal otorrhoea. In all cases of suspected condylar fracture the ear should be examined carefully with an otoscope. The appearance may be extremely confusing even to an experienced maxillofacial surgeon, and there should be no hesitation in asking the opinion of an otologist in these circumstances. The haematoma surrounding a fractured condyle may track downwards and backwards below the external auditory canal. This gives rise to ecchymosis of the skin just below the mastoid process on the same side. This particular physical sign also occurs with fractures of the base of the skull, when it is known as «Battle's sign». It is vital not to confuse the aetiology when an ecchymosis at this site is discovered On the very rare occasion when the condylar head is impacted through the glenoid fossa, the mandible will be locked and middle ear bleeding may present externally. If the condylar head is dislocated medially and all oedema has subsided due to passage of time, it may be possible to observe a characteristic hollow over the region of the condylar head, but in the immediate post-traumatic phase this physical sign is obscured by oedema. Palpation In the recently injured patient there is invariably tenderness over the condylar area. When post-traumatic oedema is present it is difficult to palpate the condylar head and what is believed to be the condylar head may, in fact, be that portion of the condylar neck continuous with the lower portion of the ramus. It may be possible to determine whether the condylar head is displaced from the glenoid fossa by palpation within the external auditory meatus. Standing in front of the patient both little fingers can be hooked into each external auditory meatus and the position and movement of each condylar head compared. Intra-oral. Displacement of the condyle from the fossa or over-riding of the fractured condylar neck shortens the ramus on that side and produces gagging of the occlusion on the ipsilateral molar teeth. The mandible deviates on opening towards the side of the fracture and there is usually painful limitation of protrusion and lateral excursion to the opposite side. Bilateral condylar fractures The signs and symptoms already mentioned for the unilateral fracture may be present on both sides. Overall mandibular movement is usually more restricted than is the case with a unilateral fracture. Intra-orally It only requires one condyle to be displaced with shortening of the ramus to lead to premature contact of the posterior teeth on the side of injury. Accordingly derangement of the occlusion is more usual with bilateral than with unilateral condylar fractures. Intracapsular fractures produce little if any shortening and the occlusion is often found to be normal. If both fractures have resulted in displacement of the condyles from the glenoid fossa or overriding of the fractured bone ends, an anterior open bite is found to be present. In all cases of bilateral fracture there is pain and limitation of opening with restricted protrusion and lateral excursions. Bilateral condylar fractures are frequently associated with fracture of the symphysis or parasymphysis and these areas should always be carefully examined. Fracture of the coronoid process This is a rare fracture which is usually considered to result from reflex contraction of the powerful anterior fibres of the temporalis muscle. The fracture can be caused by direct trauma to the ramus but is rarely in isolation in these circumstances. If the tip of the coronoid process is detached, the fragment is pulled upwards towards the infratemporal fossa by the temporalis muscle. The coronoid process is sometimes fractured during operations on large cysts of the ramus. This is a difficult fracture to diagnose clinically but there may be tenderness over the anterior part of the ramus and a tell-tale haematoma.