Appadurai Rajendran, Lingeshwar D, Missier Mary Shelloni, Maila S Valli
Department of Dental Surgery, Government Royapettah Hospital, Chennai, Tamil Nadu, India.
Indian J Dent Res. 2018 Mar-Apr;29(2):244-246. doi: 10.4103/ijdr.IJDR_4_17.
Developmental malformations of the teeth might result in alterations of their size, shape, and structure. An accessory cusp is a developmental alteration to the shape of the teeth and is more commonly found in anterior teeth, and its occurrence in permanent molars is quite rare. Accessory cusps occurring in permanent mandibular molars are termed as protostylids. Although they do not pose any significant problem with respect to the function and occlusion, it is of tremendous importance in forensic odontology. This case report presents a rare finding of protostylid on the permanent mandibular molar, and its clinical implications are illustrated.
牙齿发育畸形可能导致其大小、形状和结构的改变。副尖是牙齿形状的一种发育性改变，更常见于前牙，在恒牙磨牙中出现相当罕见。发生在恒牙下颌磨牙的副尖被称为原尖。尽管它们在功能和咬合方面不会造成任何重大问题，但在法医牙科学中却极为重要。本病例报告展示了在恒牙下颌磨牙上罕见的原尖发现，并阐述了其临床意义。
