PMC10086329_01
The picture of a patient (Case No. 1). Slight open bite was observed with no occlusal contact from the right canine to the left one. Since facets were observed on both sides of the canine and incisal edges and his study model showed tight occlusion, his mandibular had potentially shifted anteroinferior. Red circles indicate teeth that have occlusal contact.
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F1
As for abnormal clinical findings, Case No.1 showed no occlusal contact from the right canine to the left one; however, his study model which indicated a speculated original tooth position, showed tight occlusion including frontal teeth (Figure 1).
The picture of a patient (Case No. 5). Slight open bite was observed with no occlusal contact from the right first premolar to the left first premolar, and the mandibular slightly shifted to the right. The presence of facets and reconstruction on the study model revealed her mandibular shifted to anteroinferior, and consequently, open bite was presented. Red circles indicate teeth which have occlusal contact.
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F2
Similarly, Case No. 5 showed a slight open bite with no occlusal contact from right first premolar to left first premolar (Figure 2).
The picture of a patient (Case No. 8). Open bite was obvious, but occlusal contact was observed on the right second molar, left second premolar, and left molars. Frontal teeth showed open bite even on the study model; however, the left canine and both sides of the premolars and molars engaged tightly. After 6 months of follow-up, drug-induced open bite improved gradually close to the occlusion observed in the study model. Although the dental crown on the lower left first molar had been removed for the root canal treatment (yellow arrows), any other dental procedures including occlusal adjustment had not been presented. Red circles indicate teeth that have occlusal contact.
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F3
For Case No.8, her frontal teeth showed no contact even on the study model but the left canine and both sides of her molars engaged tightly (Figure 3).
The picture of a patient (Case No. 10). Open bite was obvious, and occlusal contact was observed only on the second molars. Tight occlusal contact was found on the left premolars to right molars on his study model, but partially on the right molars. Drug-induced open bite had never changed during 2 months of follow-up. Red circles indicate teeth that have occlusal contact.
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F4
After a few months of follow-up, their occlusions never improved (Figures 4, 5).
The picture of a patient (Case No. 11). Open bite was obvious, and occlusal contact was observed only partially on the second molars. Tight occlusal contact was found on her study model. Drug-induced open bite never improved even after stopping psychotropic medications. The orthodontic treatment for the intrusion of the second molars started 27 months later. Red circles indicate teeth that have occlusal contact.
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F5
After a few months of follow-up, their occlusions never improved (Figures 4, 5). Moreover, although the tonus of masticatory muscles, bruxism, and clenching improved, both sides of her second molars had been elongated (Figure 5).