Surgical Repair of Cleft Lip: Comparison of Neonatal and Standard Timing in a Systematic Review
Bibliographic record
Abstract
Cleft lip and palate (CLP) abnormalities are common birth defects encompassing isolated cleft lip, cleft palate, or combined CLP. Current knowledge indicates that CLP has both genetic and environmental causes, with strong associations between a positive family history and maternal factors such as smoking, alcohol consumption, teratogenic substance use, and poor nutrition. The upper lip develops as a result of the fusion of the paired medial nasal prominences to the maxillary prominences, forming the philtrum and lateral portions of the upper lip, respectively. Cleft lip, therefore, arises from a failure in those named structures to fuse. The current best treatment involves surgical repair to reconstruct the lip to restore normal appearance and function, including feeding and speech. This normally occurs around the age of six months (standard time) in most centers, but is performed much earlier, in the neonatal period, in other centers. This study aims to determine whether neonatal cleft lip repair is superior to standard time repair. Secondary aims are to determine both the feasibility and the safety of neonatal repair. Advanced literature searches were carried out using Medline ALL (1946 to date) and Embase (1974 to date); 11 articles were deemed relevant and included in this study. Aesthetic results showed excellent outcomes with neonatal repair with regard to the appearance of the scar, facial (lip and nasal) symmetry, but those aesthetic results are no better than those achieved at standard time. Although early intervention can be beneficial as early repair takes place when the cleft is less severe and when the tissues are more malleable, making the surgery less challenging, and when some aspects of fetal scar healing remain. Additionally, early repair has a positive impact on the development of the alveolar projections and can assist in reducing an alveolar cleft if present, improving the aesthetic outcome. Moreover, neonatal surgery carries with it no greater risk than surgery carried out at six months and will allow feeding to begin at an early stage, promoting recovery. Early repair also brings with it a large positive psychosocial impact, where infants and mothers can build a normal relationship from an early stage. Later in life, children and adults will be less self-conscious following good aesthetic repair. In conclusion, based on the limited available evidence, neonatal repair may be recommended over standard time repair.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.006 | 0.029 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.009 | 0.006 |
| Bibliometrics | 0.012 | 0.015 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.002 | 0.003 |
| Open science | 0.002 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.004 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".