Pre-extractive Inter-radicular Implant Bed Preparation versus Conventional Post-extractive Inter-radicular Implant Bed Preparation in Mandibular Molars

Inclusion Criteria:

• Patients with badly decayed posterior molar teeth.
• Distance from height of inter-radicular furcation of mandibular molars to the mandibular canal should be equal to or more than 10 mm

Exclusion Criteria:

• Distance from height of inter-radicular furcation of mandibular molars to the mandibular canal equal to or less than 8 mm.
• Heavy smokers more than 20 cigarettes per day.