Please assess the completion status of the following clinical trial:

Trial Title: Combination Therapy Associating CPAP and Mandibular Advancement Device in OSA

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: PARALLEL
- Observational Model: None
- Primary Purpose: TREATMENT
- Time Perspective: None
- Masking: NONE
- Phase: None
- Number of Arms: 3.0

Eligibility Criteria:
Inclusion Criteria:~* Arterial Hypertension (Clinical Blood Pressure \> 140/90 mmHg or patient under medication with nocturnal hypertension seen in the Ambulatory Blood Pressure Measurement)~* Severe obstructive sleep apnea syndrome, treated by CPAP for more than 6 months and less than 5 years, with a compliance \<4h/night~* No contraindication to a treatment by Mandibular Advancement Device~* Ability to understand study procedures and signed informed consent~* Covered by French social security system or equivalent~Exclusion Criteria:~* Central Obstructive Apnea (\>20% Central Apneas/Hypopneas)~* Pregnant or breastfeeding womens~* Prisoners or persons who require protection by the law~* Persons within the exclusion period of another study~* Contraindication to a mandibular advancement device (oral-dental pathology, pathology of the temporo-mandibular articulation, poor periodontal status)

- Gender: ALL
- Minimum Age: 30 Years
- Maximum Age: 75 Years
- Healthy Volunteers: f

Study Arms:
- CPAP only (Type: ACTIVE_COMPARATOR): Obstructive sleep apnea patients with CPAP treatment only
- Mandibular Advancement Device only (Type: ACTIVE_COMPARATOR): Obstructive sleep apnea patients with Mandibular Advancement Device only
- CPAP + Mandibular Advancement Device (Type: EXPERIMENTAL): Obstructive sleep apnea patients with combined CPAP and Mandibular Advancement Device

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