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Introduction: Universal applicability of Andrews measurements remains uncertain. This becomes relevant in ethnically diverse South Asian population, where craniofacial features differ from Andrews population. Ideal axial inclinations of all teeth are essential for obtaining function and aesthetic at the end of active treatment. In Nepal, currently no standard data exist on tip and torque values in individuals with untreated Angles Class I malocclusion.

Objective: To compare tip and torque values of Nepali sample calculated using digital software with Andrews values to determine their relevance and guide future appliance design.

Methodology: This analytical cross-sectional study included patients visiting Orthodontics department during 2022 January after institutional ethical approval. Patients with skeletal Class I (ANB±2), aged 18-40 years, with an Angle’s Class I malocclusion, and no prior orthodontic treatment were included using convenience sampling. Data were analysed using SPSS v.20. Measurements were expressed as mean±standard deviation. One-sample t-test compared tip and torque values of Nepali sample with Andrews values.

Result: Maxillary and mandibular dental casts of 39 individuals were scanned. Statistically significant differences (p <0.05) were observed for maxillary central incisors, lateral incisors, canines, first and second premolars, first and second molars; and mandibular lateral incisors, second premolars, first and second molars. Mean torque values of Nepali sample were significantly different from Andrews normative data across most teeth (p <0.05). When mean tip values of Nepali sample were compared with Andrews norms, statistically significant differences (p <0.05) were observed for maxillary central incisors, lateral incisors, canines, first and second premolars, and first and second molars, and mandibular lateral incisors, second premolars, first and second molars. No significant differences (p >0.05) were found for mandibular central incisors, canines, and first premolars.

Conclusion: Comparing with Andrews normal data, statistically significant differences were observed in both tip and torque measurements for several teeth, indicating ethnic variations in dental morphology.

Angle’s class I malocclusion; crown angulation; crown inclination; tip; torque.