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OCT images of the labial mucosa (b–f) and the alveolar mucosa (h–l). The sample pictures represent the upper (MP1) (b,c) and the lower lip (MP3,MP4) (d–f) as well as the upper (MP2) (h,i) and lower alveolar region (MP5) (j–l). Exemplary HE stained histological cross sections depicting the labial and the alveolar mucosa (a,g) ([44] modified). EP: epithelium, BM: basement membrane, LP: lamina propria. Scale bars: 200 .
