This study aims to evaluate and compare the change on occlusion after placing stainless steel crowns (SCC) using Hall technique and conventional technique in children between the ages of 5-8. In addition, the investigators planned to analyze the change in oral health-related quality of life between SCC applied with the Hall technique and SCC applied with the conventional method, before and after clinical application.

First, the participants who met the inclusion criteria were included in 2 study groups according to age, gender, dental experience, tooth number, applied stainless steel crown technique, Decayed, Missing due to caries, and Filled teeth in the permanent teeth/decayed, missing due to caries, and filled teeth in the deciduous teeth (DMFT/dmft index) values and International Caries Detection and Assessment System (ICDAS II) and radiographic evaluation criteria. In the experimental group, stainless steel crowns were placed on the teeth of 39 participants using the Hall technique. In the control group, stainless steel crowns were placed on the teeth of 39 participants using conventional technique.

Inclusion Criteria:

• Subjects with American Society of Anesthesiologists score I (ASA I),
• Subjects with Frankl's behavior rate III (positive) and IV (definitely positive),
• Clinically, Black class II enamel-dentin caries in the upper jaw primary second molar is; ICDAS II Scale score 4, score 5 and the accepted values in the evaluation of radiographic dental caries are D1-RA3, D2-RB4, D3-RC5,
• Antagonist of the tooth planned to be processed,
• Lamina dura and periodontal space can be observed normally
• There is permanent tooth germ underneath or the position is normal.

Exclusion Criteria:

• Allergic to the local anesthetics or sulfites,
• Had teeth with pain or sepsis,
• Were uncooperative during clinical examination,
• TMJ disorder,
• Had parafunctional habit

Randomization was performed by a computer-generated random sorting sequence