"Koperta kostna" translates as "Bone envelope" in English as it refers to the layer of bone that surrounds and supports the tooth. It is typically used to describe the thickness or dimensions of this bone layer.

Example sentences:
1. The CBCT examination revealed a very small amount of bone at the lower incisors, with a bone envelope measuring only 4-5mm at the CEJ level.
2. The dentist noted that the patient had a thin bone envelope around the molars, which could potentially affect the success of implant placement.
3. It is important to evaluate the thickness of the bone envelope before performing any periodontal treatments or surgeries.

Pocket Dentistry
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Nasal floor elevation and grafting
Apr 12, 2015 — Fig 19.6 A long implant (3.75 × 18 mm) is inserted within the osseous envelope and with the implant apex emerging 5 mm through the nasal floor.
https://pocketdentistry.com › bone-...

Bone grafting simultaneous with implant placement
Apr 12, 2015 — ... implant was placed within the bordering sidewalls of the defect (within the osseous envelope)

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Note added at 30 mins (2023-08-15 19:02:51 GMT)
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IADR Abstract Archives
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Evaluation of Association between Orthodontic Therapy and ...
Movement of the incisors out of the osseous envelope of the alveolar process may be associated with a higher tendency for developing gingival recessions.

CDEWorld
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Dental Implant Removal | Parkell Online Learning Center
Occasionally, when a fractured implant is removed via a trephine drill, a wider implant can be placed that will still be within the osseous envelope and ...