Please assess the completion status of the following clinical trial:

Trial Title: Investigation of the Two Level Simplify® Cervical Artificial Disc

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

Eligibility Criteria:
Inclusion Criteria:~* Has cervical degenerative disc disease at two (2) adjacent cervical levels (from C3 C7) requiring surgical treatment and involving intractable radiculopathy, myelopathy, or both;~* Has a herniated disc and/or osteophyte formation at each level to be treated that is producing symptomatic nerve root and/or spinal cord compression. The condition is documented by patient history (e.g., neck pain with arm pain, functional deficit and/or neurological deficit), and the requirement for surgical treatment is evidenced by radiographic studies (e.g., CT, MRI, x-rays, etc.);~* Has been unresponsive to non-operative treatment for at least six weeks or has the presence of progressive symptoms or signs of nerve root/spinal cord compression in the face of continued non-operative management;~* Has no previous surgical intervention at the involved levels or any subsequent planned/staged surgical procedure at the involved or adjacent level(s);~* Must be at least 18 years of age and be skeletally mature at the time of surgery;~* Has a preoperative Neck Disability Index (NDI) ≥ 30;~* Has a preoperative neck pain score \> 8 based on the preoperative Neck and Arm Pain Questionnaire;~* If a female of childbearing potential, patient is non-pregnant, non-nursing, and agrees not to become pregnant during the study period;~* Is willing to comply with the study plan and sign the Patient Informed Consent Form.~Exclusion Criteria:~* Has a cervical spinal condition other than symptomatic cervical DDD requiring surgical treatment at the involved levels;~* Has documented or diagnosed cervical instability relative to adjacent segments at either level, defined by dynamic (flexion/extension) radiographs showing:~  * Sagittal plane translation \> 3.5 mm, or~ * Sagittal plane angulation \> 20°;~* Has more than two cervical levels requiring surgical treatment;~* Has a fused level (or artificial disc replacement) adjacent to the levels to be treated;~* Has severe pathology of the facet joints of the involved vertebral bodies;~* Has had previous surgical intervention at either one or both of the involved levels or at adjacent levels;~* Axial neck pain only (no radicular or myelopathy symptoms);~* Has been previously diagnosed with osteopenia or osteomalacia;~* Has any of the following that may be associated with a diagnosis of osteoporosis (if Yes to any of the below risk factors, a DEXA Scan will be required to determine eligibility):~  * Postmenopausal non-black female over 60 years of age who weighs less than 140 pounds;~ * Postmenopausal female who has sustained a non-traumatic hip, spine, or wrist fracture;~ * Male over the age of 70;~ * Male over the age of 60 who has sustained a non-traumatic hip or spine fracture.~ * If the level of bone mineral density is a T score of -1.5 or lower (i.e., -1.6, 1.7, etc.), then the patient is excluded from the study~* Has presence of spinal metastases;~* Has overt or active bacterial infection, either local or systemic;~* Has insulin-dependent diabetes;~* Has chronic or acute renal failure or prior history of renal disease;~* Known PEEK, ceramic, titanium allergy;~* Is mentally incompetent (if questionable, obtain psychiatric consult);~* Is a prisoner;~* Is pregnant;~* Is currently an alcohol and/or drug abuser or currently undergoing treatment for alcohol and/or drug abuse;~* Is involved with current or pending litigation regarding a spinal condition;~* Has received drugs that may interfere with bone metabolism within two weeks prior to the planned date of spinal surgery (e.g., steroids or methotrexate), excluding routine perioperative anti-inflammatory drugs;~* Has a history of an endocrine or metabolic disorder known to affect osteogenesis (e.g., Paget's Disease, renal osteodystrophy, Ehlers-Danlos Syndrome, or osteogenesis imperfecta);~* Has a condition that requires postoperative medications that interfere with the stability of the implant, such as steroids. (This does not include low-dose aspirin for prophylactic anticoagulation and routine perioperative anti-inflammatory drugs);~* Has received treatment with an investigational therapy within 28 days prior to implantation surgery or such treatment is planned during the 16 weeks following implantation.

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

Study Arms:
- Simplify Disc (Type: EXPERIMENTAL): Simplify Disc at two levels of the cervical spine
- Historical Control (Type: NO_INTERVENTION): This study will utilize a non-concurrent historical control with subject-level data on a parallel group design. The historical control group will be formed from the randomized ACDF arm of a previously completed two level cervical disc trial.

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

Answer: outcome: complete