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Chapter 9250osteophytes with flattening of the condyles (Figure 4). Since the clinical symptomatology was worse on the right side, the surgeons opted for a unilateral (right) joint replacement.Fig. 4: A 3D model of the TMJ on the right side of the first patient, showing formation of osteophytes and flattening of the condyle (red arrow).In 2018, at the age of 55 years, he received a TMJ Parametro prosthesis on the right side. The lateral pterygoid tendon was fixed to the scaffold in the condylar neck of the mandibular component. The postoperative maximal mouth opening progressed from 21 mm (1 month postoperatively) to 49 mm (3 years postoperatively) (Fig. 5a), while the laterotrusive motion to the left (towards the unoperated side) increased from 6 mm to 14 mm during the same time period (Fig. 5b). Meanwhile, the laterotrusive motion towards the operated side increased from 5 mm to 13 mm. The results from the follow-up of his maximal mandibular movements during this 3-year period are shown in Figure 6a. His VAS pain scores (on a scale of 10) decreased from 10 (preoperatively) to 3 (1 month postoperatively), 2 (3 months postoperatively), and 0 during his next three check-ups (6 months, 1 year and 3 years postoperatively) (Fig. 6a). After 3 months, the patient was able to eat solid food again (Fig. 6a).Nikolas de Meurechy NW.indd 250 05-06-2024 10:14