The Spanish adjective 'odontológico' (meaning 'dental' or 'relating to dentistry') comes from combining the Spanish noun 'odontología' (meaning 'dentistry') with the adjective-forming suffix '-ico'. The word 'odontología' itself is constructed from two Ancient Greek elements: 'odonto-' (from 'odous' meaning 'tooth') and '-logia' (meaning 'study of'). This follows a common pattern in scientific terminology where Greek roots are combined to create technical terms.

A simpler related Spanish word is 'odontología' (dentistry), which is more commonly encountered. You might also see 'odontólogo' (dentist) in Spanish-speaking countries, rather than the term 'dentista', though both are used.

In English, we see this same Greek root 'odont-' in scientific terms like 'orthodontics' (the study of correcting teeth alignment), 'periodontal' (relating to the tissues around teeth), and 'orthodontist' (a dental specialist). The suffix '-logical' in English serves the same function as Spanish '-lógico', both coming from Greek '-logía'.