The distributions of occlusal force are shown in Fig. 8. In model MT67 (Fig. 8e), the occlusal force at the first premolar on the defect side was 10.0–86.5 N, which was 1.2–15.0-fold larger than that on the natural dentition side. The occlusal force at the second premolar on the defect side was 24.6–190.1 N, which was 2.6–8.3-fold larger than on the natural dentition side. The occlusal force at the TMJ on the defect side was 26.8–214.6 N, which was 1.2–1.5-fold larger than that on the natural dentition side. The occlusal force was concentrated at the second premolar on the defect side and approximately equivalent to that at the second molar on the natural dentition side.

In model MT7 (Fig. 8f), the occlusal force at the first premolar on the defect side was almost equivalent to that on the natural dentition side. The occlusal forces at the second premolar under loads 100, 200, 400, and 800 N were 8.6, 21.0, 43.2, and 84.5 N, respectively. These forces were 1.1–3.8-fold larger on the defect side than that on the natural dentition side. Additionally, the occlusal forces at the first molar under loads 100, 200, 400, and 800 N were 18.5, 47.2, 110.7, and 239.0 N, respectively. These forces were 1.5–2.1-fold larger on the defect side than that on the natural dentition side. The occlusal force at the TMJ on the defect side was 24.9–169.1 N, which was 1.1–1.3-fold larger than that on the natural dentition side. The occlusal force was concentrated at the first molar on the defect side and approximately equivalent to that at the second molar on the natural dentition side.

In model Im67 (Fig. 8a), the occlusal force at the premolars and the TMJ on the defect side was smaller than that in model MT67 (shown in Fig. 8e). The occlusal force at the second premolar and TMJ in model Im67 was 9.7–18.3 and 23.7–134.3 N, respectively. Compared with model MT67, the occlusal force at the second premolar and left TMJ in model Im67 was reduced by 0.005–0.5-fold and 0.6–0.9-fold, respectively. Under loads 100 and 200 N, the occlusal force at the implants was slightly smaller than that on the natural dentition side. Under load 800 N, the occlusal force at the first and second molars was 122.7 and 224.9 N, respectively. The occlusal force at the implants was slightly larger than that at natural teeth on the contralateral side. However, occlusal force distribution in model Im67 was considered to be almost symmetrical.