Implants · single question

An implant-supported crown was placed at site #8 when the patient was 15 years old. She returns at age 22 and tooth #9 now appears 2 mm longer than the implant crown. What best explains this finding?

1. Intrusion of the implant into the alveolar bone under occlusal load
2. Continued craniofacial growth and eruption of the natural tooth, leaving the ankylosed implant in infraocclusion
3. Passive eruption of the implant crown margin
4. Attrition of the incisal edge of the implant crown

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