Calcium hydroxylapatite (CaHA) fillers are not new in dorsal hand rejuvenation literature. A practical checklist published in the Journal of Cosmetic Dermatology in July 2026 does not introduce a new treatment. Its focus is reporting: which CaHA system was used, and whether dilution, plane, follow-up, and other key details were recorded clearly enough.
The dorsal hand has thin subcutaneous tissue and visible superficial structures. In this setting, spreading behavior, palpability, local irregularity, and follow-up findings may all depend on formulation state and use pattern. If a paper stops at the material name, meaningful comparison across studies becomes difficult.
The value of this checklist is practical: when reading a paper, do not stop at the material name. First check whether the record is detailed enough. At minimum, the following fields deserve attention:
| Item to Report | What Readers Need to See |
|---|---|
| Product system | CaHA-CMC, HA-CaHA, or another composite system; avoid reporting only “CaHA.” |
| Use state | Original, diluted, hyperdiluted, or mixed use; dilution ratio and mixing vehicle should be stated. |
| Use record | Plane, total amount, distribution pattern, and entry route; do not reduce these details to “injected.” |
| Observation target | Volume improvement, skin-quality observation, or both; endpoints should match the stated objective. |
| Follow-up information | Time points, adverse events, palpability, and local irregularity records. |
These fields are not added to make papers longer. They define what was actually studied. A paper that reports an HA-CaHA composite system, 1:2 dilution, and six months of follow-up is not directly comparable with a paper that only says “CaHA was injected.”
In that sense, the checklist is a reading and reporting aid. It does not rank products, compare use patterns, or provide an operating protocol. It simply asks authors to record the product system, formulation state, use record, and follow-up findings clearly.
This article is a public literature note. It discusses formulation and reporting details in CaHA-based filler studies only, and does not provide medical product recommendations, clinical indications, or treatment advice.
References
- Lin C Y. Calcium Hydroxylapatite-Based Fillers in Dorsal Hand Rejuvenation: A Practical Checklist for Formulation and Protocol Specificity. Journal of Cosmetic Dermatology. 2026;25(7):e71024. DOI: 10.1111/jocd.71024.