The Narumi-Katayama index of a graph was introduced in 1984 for representing the carbon skeleton of a saturated hydrocarbons and is defined as the product of degrees of all the vertices of the graph. In this paper, we examine the Narumi-Katayama index of different total transformation graphs. MSC (2010): Primary: 05C35; Secondary: 05C07, 05C40

OBJECTIVE The present study aimed at evaluating the reliability of Bolton analysis in tridimensional virtual models, comparing it with the manual method carried out with dental casts. METHODS The present investigation was performed using 56 pairs of dental casts produced from the dental arches of patients in perfect conditions and randomly selected from Universidade Federal da Bahia, School o...

OBJECTIVE The treatment of craniofacial reconstructive surgery patients may benefit from comparison to average referent three-dimensional landmark data. These data may be useful for diagnosis, treatment planning, prosthetic design, or outcomes assessment. With regard to subadult patients, we hypothesize that the pattern of ontogenetic shape change of same sex, same ethnicity, referent populatio...

Mục tiêu: Xác định giá trị trung bình kích thước độ rộng của răng và đánh sự sai biệt hai hàm theo phân tích Bolton trên sinh viên Răng Hàm Mặt tại Trường Đại học Y Dược Cần Thơ. Đối tượng phương pháp: Nghiên cứu cắt ngang mô tả thực hiện 110 Thơ, gồm 57 nam 53 nữ trong tuổi từ 18 – 25. Các đối được lấy dấu, đổ mẫu hàm, sau đó tiến hành đo đạc xác tính toán các tỷ số Bolton. Kết quả: Trung ở đị...

Background To compare the reliability and accuracy of direct and indirect dental measurements derived from two types of 3D virtual models: generated by intraoral laser scanning (ILS) and segmented cone beam computed tomography (CBCT), comparing these with a 2D digital model. Material and Methods One hundred patients were selected. All patients' records included initial plaster models, an intr...

The ant tribe Dacetini contains more than 800 species (Bolton et al. 2006). Many dacetine ants are specialized predators on soil inhabiting arthropods such as Collembola, Acarina, and to some extent also Diplura (Brown and Wilson 1959; Masuko 1984, 2009ab; Wilson 1953). Due to their peculiar morphological characteristics related to this specialized predation, dacetine ants have attracted the in...