Please assess the completion status of the following clinical trial:

Trial Title: Impact of Interface With/Without Oral Appliance of Sleep Apnea Treatment

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: CROSSOVER
- Observational Model: None
- Primary Purpose: TREATMENT
- Time Perspective: None
- Masking: NONE
- Phase: None
- Number of Arms: 2.0

Eligibility Criteria:
Inclusion Criteria:~* normal nasal breathing~* dentition allowing for use of an oral appliance~* absence of mandibular joint pathology~* Patients requiring the use of a facial mask during CAPP titration due to presence of mouth leaks with a nasal/prong interface~* Patients using CPAP less than 3 hours/day as prescribed following CPAP titration~Exclusion Criteria:~* Clinical instability~* smoking cessation~* current weight loss strategy~* Marked anatomic abnormalities of upper airway (i.e. macroglossia, tonsils hypertrophy)~* severe cardio-metabolic co-morbidity

- Gender: ALL
- Minimum Age: 18 Years
- Maximum Age: None
- Healthy Volunteers: f

Study Arms:
- oro-nasal mask (Type: ACTIVE_COMPARATOR): Oro-nasal mask during 1 month of auto CPAP
- Nasal mask and oral appliance (Type: EXPERIMENTAL): Nasal mask and oral appliance during 1 month of auto CPAP

Based on this trial design, predict the completion outcome and termination type (if applicable).