Does Pterygoid Hamulotomy During Palatoplasty Affect Hearing Outcomes in Nonsyndromic Cleft Palate Patients?

Cleft palate repair aims to achieve tension-free closure without compromising Eustachian tube function and hearing outcomes. The effect of pterygoid hamulotomy on postoperative hearing remains inconclusive.

This study evaluated the effect of pterygoid hamulotomy during palatoplasty on hearing thresholds and middle ear status in nonsyndromic cleft palate patients.

This prospective double-blind study was conducted at the Department of Oral and Maxillofacial Surgery at a tertiary care hospital. Eighty nonsyndromic cleft palate patients aged 10 to 60 months were included and allocated alternately to 2 groups: Group I (palatoplasty with hamulotomy, n = 40) and Group II (palatoplasty without hamulotomy, n = 40). Those with prior palatal or ear surgery, syndromic conditions, or congenital hearing loss were excluded.

The predictor variable was operative technique (with or without pterygoid hamulotomy), and patients were alternately allocated to 2 groups upon enrollment.

The primary outcome variable was hearing threshold measured using brainstem-evoked response audiometry preoperatively, and at 1 and 6 months postoperatively. The secondary outcome was middle ear status assessed by otoscopic examination at the same time points.

Covariates included age, sex, and cleft type (complete or incomplete).

Data were analyzed using a mixed-effects repeated measures analysis of variance (ANOVA) to evaluate changes in brainstem-evoked response audiometry hearing thresholds over time and between groups. χ² tests were used for comparing categorical outcomes such as otoscopic findings. A significance level of P < .05 was considered statistically significant.

The final sample included 80 patients (mean age 32.7 ± 12.4 months; 53% male). At 6 months postoperatively, mean hearing thresholds improved in both groups (group I: 32.5 ± 6.4 dB to 22.8 ± 4.9 dB; group II: 33.1 ± 6.2 dB to 23.4 ± 5.1 dB), with no statistically significant difference between groups (mean difference: 0.6 dB, 95% CI: -1.3 to 2.5, P = .6). Normal middle ear status improved at 6 months in both groups (group I: 75.0%, group II: 72.5%), with no significant intergroup difference (P = .8).

Hearing thresholds and middle ear status improved following palatoplasty in both groups. Pterygoid hamulotomy did not adversely affect hearing outcomes, suggesting it may be used without impacting auditory function.