Читать книгу The Veterinary Dental Patient: A Multidisciplinary Approach - Группа авторов - Страница 26

An explorer and periodontal probe are very often combined, having one side of the instrument being an explorer and the other being a probe. For dogs, a combination of a UNC 17 periodontal probe with a shepherd hook explorer is this author's preference (Figure 1.22). In cats, a finer explorer ODU or Orban explorer combined with a Michigan probe with Williams markings will better adapt to the feline gingival sulcus and smaller oral cavity. Additionally, evaluation of areas suspected of tooth resorption is more convenient with this explorer (Figure 1.23).

Mouth props are preferred to gags as they do not apply additional force to the temporomandibular joint area, and in cats they diminish the risk of complications of excessive jaws opening (Stiles et al. 2012) (Figure 1.24).

For conscious patient examination, finger protectors are very useful where there is danger of the patient hurting the assessor (see Figure 1.7).

Mirrors can be used to visualize the palatal and lingual surfaces of teeth, the caudal part of the oral cavity, the pharynx, and the choanae. The most caudal areas can be illuminated by light reflection from the mirror (Figure 1.25).

Revealing small lesions or details during oral examination is easier with the use of magnification combined with lightening (Figure 1.26). For beginners, 2.5 dental loupes are a good choice. With time, 3.5× magnification may be preferred. It is important to understand that using magnification will not immediately improve the quality of a procedure. It takes experience and training, but magnification will become an invaluable support for the operator, help to avoid errors, and expose small details during operations.

The next step in magnifying the operating area is the use of an operating microscope, which further improves the assessment of surgical tissues.

During oral assessment, it is important to record all observations on a dental chart appropriate to the species and age of the patient. Regardless of whether two‐ or four‐handed dentistry (i.e., with or without an assistant) is performed, filling in the chart is obligatory (Figure 1.27).

High‐quality photography can further augment the diagnostic process. It can be used for presentation to the owner, for communication with a referring veterinarian, for comparison at distant follow‐up, and for illustration of publications or presentations. This is a matter of personal preference, but the camera should preserve natural colors and provide sufficient magnification and focal distance. The latter can be difficult in compact cameras, which require very small distances for macro mode, where lenses and external optics may get foggy from the humid oral environment.

Figure 1.19 Advantages of 3D versus 2D imaging. (a) The sequestrum revealed next to the infected root of the 208 (arrow) would not be identified in a standard radiograph. (b) The extent of neoplastic growth is better assessed in 3D than in intraoral radiograph.

Figure 1.20 Device combining a scaler and a polisher.

Figure 1.21 Dental unit main board, including (from left) suction, three‐way syringe, high‐speed handpiece, low‐speed handpiece, second high‐speed handpiece, and illuminating wand.

Figure 1.22 (a) Combination of a UNC probe and explorer in a single instrument. (b) and its pen grasp.

Figure 1.23 Series of combined probes and explorers. (a) Probes. From left: UNC 15, Michigan, Niemiec, UNC 17, Williams. (b) Whole instruments.