Time of emergence of permanent teeth of the children of Larkana, Pakistan

Nazeer Khan; Sarfraz Ali Abbasi; Hasham Khan; Mujeeb ur Rehman Baloch; Arham Chohan

Time of emergence of permanent teeth of the children of Larkana, Pakistan

Authors

Nazeer Khan MSc, PhD; Professor of Biostatistics, Shifa Tameer Millat University, Islamabad.
Sarfraz Ali Abbasi BDS, MCPS; Formally Senior Dental Surgeon, Chandka Medical College Hospital, Larkana.
Hasham Khan BDS, MSc; Professor of Pediatric Dentistry, Khyber College of Dentistry, Peshawar.
Mujeeb ur Rehman Baloch BDS, MPH; Professor of Preventive/Community Dentistry Bolan Medical College, Quetta.
Arham Chohan BDS, MSc, FPFA, FADI; Professor of Pediatric Dentistry, CMH Lahore Medical College, Lahore.

Keywords:

Eruption time, just erupted tooth, oral pathology, permanent teeth

Abstract

Introduction: To establish the sequence and eruption time of permanent teeth of children of Sindh and to find out the effect of gender, height, weight, and body mass index on time of eruption.

Material and methods: This investigation was a part of the nationwide study conducted to determine the standard sequence and time of eruption of permanent teeth of Pakistani children. 15 schools, including 9 private schools, were selected from the schools' list. Children with at least one ‘just erupted’ tooth were examined. 1205 cases were collected from Kindergarten 1 to grade 8. Height, weight, and information regarding dietary pattern were recorded.

Results: 658 (54.6%) students were males and the largest number (233) was collected from grade 5. The lowest mean eruption time in the maxillary jaw was for the first molars (#16 & #26) and the largest mean eruption time appeared for the right and left 2nd molars (#17 & #27). The left central incisor (#21) and right first molar (#16) showed the minimum mean eruption time in the mandibular jaw, while the maximum mean eruption time belonged to the left second molar (#37). Only left central incisor (#21) showed significant difference between males and females. 28 and 4 teeth showed a significantly positive correlation of eruption time with weight, and height respectively.

Conclusions: Study showed that due to some different genetic composition, the time of eruption of permanent teeth of Sindhi children is similar to Pakhtoon living in Khyber Pakhtoon Khwa, but different than Mahajirs living in Karachi.