Abstract
Background: A smile, a good harmonization of teeth, alveolar bones and gums inside the oral cavity can improve one’s appearance and self-confidence. Short clinical crowns have become a frequent chief complaint. One of reasons for this is the altered passive eruption.
 Objective: To describe the correction of altered passive eruption by performing crown lengthening with an osteotomy to achieve ideal clinical crowns and restore the functions and aesthetics.
 Case Report: A 31-year-old man was admitted to the Periodontics Clinic of Rumah Sakit Gigi dan Mulut, Universitas Gadjah Mada Prof. Soedomo, Yogyakarta, Indonesia, with a chief complaint of front teeth looking short. He was diagnosed with an altered passive eruption in connection with a gummy smile. Crown lengthening was performed by gingivectomy technique with osteotomy, and interdental papilla was preserved.
 Conclusion: Crown lengthening is an effective treatment in correcting dysfunctions and aesthetics due to altered passive eruption.
 Keywords: altered passive eruption, short clinical crowns, crown lengthening procedure, osteotomy, papilla preservation
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