Evaluation of a 3D Printed Space Maintainer Versus the Conventional Band and Loop

Inclusion Criteria

• •1. Apparently healthy children.
• •2. Children of both genders aged 6-9 years old.
• •3. Guardians agree to join the study and sign the informed consent.
• •4. Recent premature loss of primary first molars or having primary first molars indicated for extraction on both sides.
• •5. Sound buccal and lingual surfaces of abutment teeth (primary second molar and primary canine).
• •6. Good oral hygiene.
• •7. Absence of radiographic periapical pathology related to the abutment teeth.
• •8. Absence of abnormal occlusal conditions such as posterior crossbite, deep bite, and scissor bite.
• •9. All the indications for a band and loop space maintainer are met.