Please assess the completion status of the following clinical trial:

Trial Title: Comparison of Two Oral Appliances in the Treatment of Sleep Apnea Syndrome

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

Eligibility Criteria:
Inclusion Criteria:~* Sufficient teeth to allow wearing of the device~* Mild to severe OSAS~* Ability to answer the questionnaires~* No concomitant CPAP treatment~* BMI inferior to 32 kg/m2~Exclusion Criteria:~* Important dental or parodontal disease~* Central sleep apnea~* Jaw opening limitations~* Temporo-mandibular joint dysfunction~* Major gag reflex precluding the long-term use of the device~* Major or unstable cardiovascular or pulmonary disease

- Gender: ALL
- Minimum Age: 18 Years
- Maximum Age: 65 Years
- Healthy Volunteers: f

Study Arms:
- Propulsion type appliance (Herbst) (Type: EXPERIMENTAL): None
- Retention type appliance (ORM) (Type: ACTIVE_COMPARATOR): Retention type appliance

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