Many dogs tend to be stoic, inflammation of the gums is a red flag.
In fact, doing anything other than a dental cleaning and whatever else is recommended by the specialist could result in increased pain and infection.
https://www.avdc.org/periodontaldisease.html
excerpt below
Periodontal disease begins when bacteria in the mouth form a substance called plaque that sticks to the surface of the teeth. Subsequently, minerals in the saliva harden the plaque into dental calculus (tartar), which is firmly attached to the teeth. Tartar above the gum line is obvious to many owners, but is not of itself the cause of disease.
The real problem develops as plaque and calculus spread under the gum line. Bacteria in this ‘sub-gingival’ plaque set in motion a cycle of damage to the supporting tissues around the tooth, eventually leading to loss of the tooth. Bacteria under the gum line secrete toxins, which contribute to the tissue damage if untreated. These bacteria also stimulate the animal’s immune system. The initial changes cause white blood cells and inflammatory chemical signals to move into the periodontal space (between the gum or bone and the tooth). The function of the white blood cells is to destroy the bacterial invaders, but chemicals released by the overwhelmed white blood cells cause damage to the supporting tissues of the tooth. Instead of helping the problem, the patient’s own protective system actually worsens the disease when there is severe build-up of plaque and tartar.
Periodontal disease includes gingivitis (inflammation [reddening] of the gums) and periodontitis (loss of bone and soft tissue around the teeth). There is a wide range in the appearance and severity of periodontal disease, which often cannot be properly evaluated or treated without general anesthesia for veterinary patients. Effects within the oral cavity include damage to or loss of gum tissue and bone around the teeth, development of a hole (‘fistula’) from the oral cavity into the nasal passages causing nasal discharge, fractures of the jaw following weakening of the jaw bone, and bone infection (‘osteomyelititis’). Bacteria from the mouth can enter the bloodstream and are carried around the body. Studies in dogs have shown that periodontal disease is associated with microscopic changes in the heart, liver, and kidneys.
Studies in humans have linked periodontal disease to a variety of health problems including poor control of diabetes mellitus and increased severity of diabetic complications. Additionally, it has been shown that diabetes is a risk factor for periodontal disease
