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| − | ==Examination Under General Anaesthesia== | + | {{OpenPagesTop}} |
| − | | + | ==Introduction== |
| | The endotracheal tube does not allow full closure of the mouth to examine the relationship between the teeth. In the anaesthetised patient prior to intubation, the muscles are relaxed and the tongue often gets in the way, so a complete evaluation of occlusion is not always possible. | | The endotracheal tube does not allow full closure of the mouth to examine the relationship between the teeth. In the anaesthetised patient prior to intubation, the muscles are relaxed and the tongue often gets in the way, so a complete evaluation of occlusion is not always possible. |
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| − | </center> | + | <br><br></center> |
| − | | + | [[File:Filling a chart.jpg|right|200px|thumb|Filling in a [[Dental Recording|dental chart]] during examination under general anaesthesia<small>''© Lisa Milella 2013''</small>]] |
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| | Any abnormalities need to be noted – look for '''swellings, inflammation, ulcerations'''. Check if the lesion is localised to one area or more generalised. Always '''biopsy''' abnormal tissue if a cause cannot be identified. | | Any abnormalities need to be noted – look for '''swellings, inflammation, ulcerations'''. Check if the lesion is localised to one area or more generalised. Always '''biopsy''' abnormal tissue if a cause cannot be identified. |
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| − | ==Indices and Criteria==
| + | '''Indices and Criteria''' |
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| − | The following indices and criteria should be evaluated for each tooth: | + | The following [[Dental Indices and Criteria|indices and criteria]] should be evaluated for each tooth: |
| | #Gingivitis and gingival index | | #Gingivitis and gingival index |
| | #Periodontal probing depth | | #Periodontal probing depth |
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| | #Furcation involvement | | #Furcation involvement |
| | #Mobility | | #Mobility |
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| − | In animals with large accumulations of dental deposits (plaque and calculus) on the teeth, it may be necessary to remove these to assess periodontal status accurately. Care must be taken not to damage the gingival tissues whilst removing the calculus.
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| − | ===Gingivitis and Gingival Index===
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| − | The presence and degree of '''[[gingivitis]]''' (inflammation of the [[gingiva]]) is assessed based on a combination of redness and swelling, as well as presence or absence of '''bleeding''' on gentle probing of the '''gingival sulcus'''. An index which relies on both visual inspection and bleeding, namely the '''modified Löe and Silness gingival index''' (Löe, 1967), can also be used:
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| − | :'''Gingival index 0''' - Clinically healthy gingiva
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| − | :'''Gingival index 1''' - Mild gingivitis: slight reddening and swelling of the gingival margin; no bleeding on gentle probing of the gingival sulcus
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| − | :'''Gingival index 2''' - Moderate gingivitis: the gingival margin is red and swollen; gentle probing of the gingival sulcus results in bleeding
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| − | :'''Gingival index 3''' - Severe gingivitis: the gingival margin is very swollen with a red or bluish-red color; there is spontaneous hemorrhage and/or ulceration of the gingival margin
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| − | <br><br>
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| − | ===Periodontal Probing Depth (PPD)===
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| − | The depth of the sulcus can be assessed by gently inserting a graduated [[Oral Examination Instruments#Periodontal Probe|periodontal probe]] '''until resistance is encountered at the base of the sulcus'''. The depth from the free [[Gingiva|gingival margin]] to the base of the sulcus is measured in mm at several locations around the whole circumference of the [[:Category:Teeth - Anatomy & Physiology|tooth]]. The probe is moved gently horizontally, walking along the floor of the sulcus. The '''gingival sulcus is 1–3 mm deep in the dog''' and '''0.5–1 mm in the cat'''. Measurements in excess of these values usually indicate [[Periodontal Disease|periodontal disease]], when the [[Enamel Organ#Periodontal Ligament|periodontal ligament]] has been destroyed and [[Enamel Organ#Alveolar Bone|alveolar bone]] resorbed, thus allowing the probe to be inserted to a greater depth. The term used to describe this is '''periodontal pocketing'''. All sites with periodontal pocketing should be accurately recorded. Gingival inflammation resulting in swelling or hyperplasia of the free [[gingiva]] will, of course, also result in measuring sulcus depths in excess of normal values. In these situations, the term '''pseudopocketing''' is used, as the periodontal ligament and bone are intact (i.e.there is no evidence of [[periodontitis]]) and the increase in PPD is due to swelling or hyperplasia of the gingiva.
| + | {{Lisa Milella written |
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| + | |date = 13 August 2014}} |
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| | + | {{Waltham}} |
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| − | ==Gingival Recession==
| + | [[Category:Oral Examination]] |
| − | Gingival recession is also measured using a periodontal probe. It is the distance (in mm) from the cemento-enamel junction to the free gingival margin. At sites with gingival recession, PPD may be within normal values despite loss of alveolar bone due to periodontitis.
| + | [[Category:Waltham reviewed]] |
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| − | ==Furcation Involvement==
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| − | Furcation involvement refers to the situation where the bone between the roots of multirooted teeth is destroyed due to periodontitis (Fig. 6.4). The furcation sites of multirooted teeth should be examined with either a periodontal probe. The grading of furcation involvement:
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| − | '''Grade 0''' - No furcation involvement<br>
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| − | '''Grade 1''' - Initial furcation involvement: the furcation can be felt with the probe/explorer, but horizontal tissue destruction is less than 1/3 of the horizontal width of the furcation<br>
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| − | '''Grade 2''' - Partial furcation involvement: it is possible to explore the furcation but the probe/explorer cannot be passed through it from buccal to palatal/lingual; horizontal tissue destruction is more than 1/3 of the horizontal width of the furcation<br>
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| − | '''Grade 3''' - Total furcation involvement: the probe/explorer can be passed through the furcation from buccal to palatal/lingual
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| − | ==Tooth Mobility==
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| − | The extent of tooth mobility should be assessed using a suitable instrument, e.g. the blunt end of the handle of a dental mirror or probe. It should not be assessed using fingers directly, since the yield of the soft tissues of the fingers will mask the extent of tooth mobility. The grading of mobility:
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| − | '''Grade 0''' - No mobility<br>
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| − | '''Grade 1''' - Horizontal movement of 1 mm or less<br>
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| − | '''Grade 2''' - Horizontal movement of more than 1 mm. Note that multirooted teeth are scored more severely and a horizontal mobility in excess of 1 mm is usually considered a Grade 3 even in the absence of vertical movement.<br>
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| − | '''Grade 3''' - Vertical as well as horizontal movement
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| − | ==Crown Abnormalities==
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| − | Any surface defect of the crown needs to be identified and recorded. Surface defects are diagnosed using the explorer probe – the sharp point is run across the crown to identify any catches. Crown defects such as enamel dysplasia, fractured teeth (with or without pulp exposure), worn teeth, caries lesions or odontoclastic resorptive lesions are noted on the chart and treated appropriately.
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| − | [[Category:To Do - Dentistry]] | |