Tehran University of Medical Sciences Frontiers in Dentistry 2676-296X 21 0 2024 08 13 1 6 EN Neeraj Kumar Department of Pediatric Dentistry, Postgraduate Institute of Child Health, Noida (Uttar Pradesh); All India Institute of Medical Sciences, Bilaspur, (H.P); Unit of Pedodontics and Preventive Dentistry, Oral Health Sciences Centre, PGIMER, Chandigarh, India Richa Kumari Department of Pediatric Dentistry, ESIC Dental College and Hospital, Rohini, New Delhi, India 2021 09 23 2022 01 31 Ectopic eruption of molars occurs more frequently in developing permanent dentition, and requires immediate intervention. Herein, two cases are discussed with ectopic eruption of permanent maxillary first molars which were diagnosed and managed conservatively using a modified Humphrey's appliance, named the NR’s appliance. The appliance was fabricated by band adaptation and using wire components of a 21-gauge stainless-steel wire. Also, the Nance palatal arch was used as the anchorage unit. The molars were uprighted and distalized within 3 months. Early diagnosis and prompt treatment could result in prevention of malocclusion in the early mixed dentition period. https://fid.tums.ac.ir/index.php/fid/article/view/4205 https://fid.tums.ac.ir/index.php/fid/article/download/4205/2063