Single-Tooth Dental Implant: Restoring Chewing Function After a Long-Standing Missing Lower Molar

Age: 52   Gender: Male

Medical History: Diagnosed with a long-standing edentulous space at the lower right first molar (tooth 46) following extraction six years prior. Patient reported reduced chewing efficiency on the right side and occasional food impaction. Mild controlled hypertension on regular medication. Non-smoker, no diabetes, no known drug allergies, no history of prior implant therapy. The patient is a 52-year-old working professional who preferred a fixed, long-term replacement option over a removable prosthesis.

Long-standing edentulous space at tooth 46 (lower right first molar) with associated alveolar ridge resorption, mesial tipping of tooth 47, and mild supra-eruption of tooth 16. No active dental caries, no periodontal disease, no temporomandibular joint dysfunction. ASA II classification due to controlled hypertension. Confirmed candidate for single-tooth implant rehabilitation with delayed loading.

Single missing posterior teeth are a common adult dental finding, particularly in patients who delay replacement after extraction. Although the gap is not cosmetically visible, the long-term consequences are clinically significant. Adjacent teeth gradually tilt into the edentulous space, opposing teeth over-erupt due to loss of occlusal contact, and the alveolar bone resorbs in the absence of functional loading. These changes affect occlusion, masticatory efficiency, and the long-term restorability of the site. A dental implant replaces both the missing root and crown, restoring function and maintaining alveolar bone stimulation.

The patient was reviewed ten days after crown placement. Functional bilateral chewing had been restored and no occlusal interferences were reported. The previously over-erupted opposing tooth 16 was reshaped to establish even bilateral contact in centric occlusion. The patient was instructed in implant-specific oral hygiene measures, including the use of a soft interdental brush and water flosser, and placed on a six-month professional cleaning recall.

 At the six-month review, peri-apical radiographic evaluation showed stable crestal bone levels around the implant, with no evidence of bone loss or peri-implantitis. The patient is enrolled in a long-term maintenance protocol that includes annual radiographic monitoring and bi-annual professional cleaning. Soft tissue health around the implant remained satisfactory with no signs of inflammation or marginal recession.

This case illustrates a key principle in implant dentistry: single-tooth replacement is most predictable when planned early, with adequate residual bone, controlled systemic health, and accurate CBCT-guided positioning. Long-standing edentulous sites carry secondary changes such as bone resorption, drifting of adjacent teeth, and supra-eruption of the opposing dentition, all of which complicate later restoration. Where the residual bone volume is adequate and systemic conditions are controlled, a CBCT-guided single-tooth implant remains a standard, predictable solution for posterior tooth replacement.